blob: 618c43be0bc36e35cd9915fe9652c36ebd3f3fc6 [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>
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
34MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
35MODULE_DESCRIPTION("Hardware dependent layer");
36MODULE_LICENSE("GPL");
37
Clemens Ladischf87135f2005-11-20 14:06:59 +010038static LIST_HEAD(snd_hwdep_devices);
Linus Torvalds1da177e2005-04-16 15:20:36 -070039static DECLARE_MUTEX(register_mutex);
40
Takashi Iwaid9a98de2005-11-17 13:58:21 +010041static int snd_hwdep_free(struct snd_hwdep *hwdep);
42static int snd_hwdep_dev_free(struct snd_device *device);
43static int snd_hwdep_dev_register(struct snd_device *device);
44static int snd_hwdep_dev_unregister(struct snd_device *device);
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Clemens Ladischf87135f2005-11-20 14:06:59 +010047static struct snd_hwdep *snd_hwdep_search(struct snd_card *card, int device)
48{
49 struct list_head *p;
50 struct snd_hwdep *hwdep;
51
52 list_for_each(p, &snd_hwdep_devices) {
53 hwdep = list_entry(p, struct snd_hwdep, list);
54 if (hwdep->card == card && hwdep->device == device)
55 return hwdep;
56 }
57 return NULL;
58}
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
60static loff_t snd_hwdep_llseek(struct file * file, loff_t offset, int orig)
61{
Takashi Iwaid9a98de2005-11-17 13:58:21 +010062 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 if (hw->ops.llseek)
64 return hw->ops.llseek(hw, file, offset, orig);
65 return -ENXIO;
66}
67
Takashi Iwaid9a98de2005-11-17 13:58:21 +010068static ssize_t snd_hwdep_read(struct file * file, char __user *buf,
69 size_t count, loff_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070{
Takashi Iwaid9a98de2005-11-17 13:58:21 +010071 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 if (hw->ops.read)
73 return hw->ops.read(hw, buf, count, offset);
74 return -ENXIO;
75}
76
Takashi Iwaid9a98de2005-11-17 13:58:21 +010077static ssize_t snd_hwdep_write(struct file * file, const char __user *buf,
78 size_t count, loff_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -070079{
Takashi Iwaid9a98de2005-11-17 13:58:21 +010080 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 if (hw->ops.write)
82 return hw->ops.write(hw, buf, count, offset);
83 return -ENXIO;
84}
85
86static int snd_hwdep_open(struct inode *inode, struct file * file)
87{
88 int major = imajor(inode);
Takashi Iwaid9a98de2005-11-17 13:58:21 +010089 struct snd_hwdep *hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 int err;
91 wait_queue_t wait;
92
Clemens Ladischf1902862005-10-24 17:05:03 +020093 if (major == snd_major) {
Clemens Ladischf87135f2005-11-20 14:06:59 +010094 hw = snd_lookup_minor_data(iminor(inode),
95 SNDRV_DEVICE_TYPE_HWDEP);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096#ifdef CONFIG_SND_OSSEMUL
Clemens Ladischf1902862005-10-24 17:05:03 +020097 } else if (major == SOUND_MAJOR) {
Clemens Ladischf87135f2005-11-20 14:06:59 +010098 hw = snd_lookup_oss_minor_data(iminor(inode),
99 SNDRV_OSS_DEVICE_TYPE_DMFM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100#endif
Clemens Ladischf1902862005-10-24 17:05:03 +0200101 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 if (hw == NULL)
104 return -ENODEV;
105
106 if (!hw->ops.open)
107 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
109 if (!try_module_get(hw->card->module))
110 return -EFAULT;
111
112 init_waitqueue_entry(&wait, current);
113 add_wait_queue(&hw->open_wait, &wait);
114 down(&hw->open_mutex);
115 while (1) {
116 if (hw->exclusive && hw->used > 0) {
117 err = -EBUSY;
118 break;
119 }
120 err = hw->ops.open(hw, file);
121 if (err >= 0)
122 break;
123 if (err == -EAGAIN) {
124 if (file->f_flags & O_NONBLOCK) {
125 err = -EBUSY;
126 break;
127 }
128 } else
129 break;
130 set_current_state(TASK_INTERRUPTIBLE);
131 up(&hw->open_mutex);
132 schedule();
133 down(&hw->open_mutex);
134 if (signal_pending(current)) {
135 err = -ERESTARTSYS;
136 break;
137 }
138 }
139 remove_wait_queue(&hw->open_wait, &wait);
140 if (err >= 0) {
141 err = snd_card_file_add(hw->card, file);
142 if (err >= 0) {
143 file->private_data = hw;
144 hw->used++;
145 } else {
146 if (hw->ops.release)
147 hw->ops.release(hw, file);
148 }
149 }
150 up(&hw->open_mutex);
151 if (err < 0)
152 module_put(hw->card->module);
153 return err;
154}
155
156static int snd_hwdep_release(struct inode *inode, struct file * file)
157{
158 int err = -ENXIO;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100159 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 down(&hw->open_mutex);
161 if (hw->ops.release) {
162 err = hw->ops.release(hw, file);
163 wake_up(&hw->open_wait);
164 }
165 if (hw->used > 0)
166 hw->used--;
167 snd_card_file_remove(hw->card, file);
168 up(&hw->open_mutex);
169 module_put(hw->card->module);
170 return err;
171}
172
173static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait)
174{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100175 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 if (hw->ops.poll)
177 return hw->ops.poll(hw, file, wait);
178 return 0;
179}
180
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100181static int snd_hwdep_info(struct snd_hwdep *hw,
182 struct snd_hwdep_info __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100184 struct snd_hwdep_info info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
186 memset(&info, 0, sizeof(info));
187 info.card = hw->card->number;
188 strlcpy(info.id, hw->id, sizeof(info.id));
189 strlcpy(info.name, hw->name, sizeof(info.name));
190 info.iface = hw->iface;
191 if (copy_to_user(_info, &info, sizeof(info)))
192 return -EFAULT;
193 return 0;
194}
195
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100196static int snd_hwdep_dsp_status(struct snd_hwdep *hw,
197 struct snd_hwdep_dsp_status __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100199 struct snd_hwdep_dsp_status info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 int err;
201
202 if (! hw->ops.dsp_status)
203 return -ENXIO;
204 memset(&info, 0, sizeof(info));
205 info.dsp_loaded = hw->dsp_loaded;
206 if ((err = hw->ops.dsp_status(hw, &info)) < 0)
207 return err;
208 if (copy_to_user(_info, &info, sizeof(info)))
209 return -EFAULT;
210 return 0;
211}
212
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100213static int snd_hwdep_dsp_load(struct snd_hwdep *hw,
214 struct snd_hwdep_dsp_image __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100216 struct snd_hwdep_dsp_image info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 int err;
218
219 if (! hw->ops.dsp_load)
220 return -ENXIO;
221 memset(&info, 0, sizeof(info));
222 if (copy_from_user(&info, _info, sizeof(info)))
223 return -EFAULT;
224 /* check whether the dsp was already loaded */
225 if (hw->dsp_loaded & (1 << info.index))
226 return -EBUSY;
227 if (!access_ok(VERIFY_READ, info.image, info.length))
228 return -EFAULT;
229 err = hw->ops.dsp_load(hw, &info);
230 if (err < 0)
231 return err;
232 hw->dsp_loaded |= (1 << info.index);
233 return 0;
234}
235
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100236static long snd_hwdep_ioctl(struct file * file, unsigned int cmd,
237 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100239 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 void __user *argp = (void __user *)arg;
241 switch (cmd) {
242 case SNDRV_HWDEP_IOCTL_PVERSION:
243 return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp);
244 case SNDRV_HWDEP_IOCTL_INFO:
245 return snd_hwdep_info(hw, argp);
246 case SNDRV_HWDEP_IOCTL_DSP_STATUS:
247 return snd_hwdep_dsp_status(hw, argp);
248 case SNDRV_HWDEP_IOCTL_DSP_LOAD:
249 return snd_hwdep_dsp_load(hw, argp);
250 }
251 if (hw->ops.ioctl)
252 return hw->ops.ioctl(hw, file, cmd, arg);
253 return -ENOTTY;
254}
255
256static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma)
257{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100258 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 if (hw->ops.mmap)
260 return hw->ops.mmap(hw, file, vma);
261 return -ENXIO;
262}
263
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100264static int snd_hwdep_control_ioctl(struct snd_card *card,
265 struct snd_ctl_file * control,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 unsigned int cmd, unsigned long arg)
267{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 switch (cmd) {
269 case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE:
270 {
271 int device;
272
273 if (get_user(device, (int __user *)arg))
274 return -EFAULT;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100275 down(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 device = device < 0 ? 0 : device + 1;
277 while (device < SNDRV_MINOR_HWDEPS) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100278 if (snd_hwdep_search(card, device))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 break;
280 device++;
281 }
282 if (device >= SNDRV_MINOR_HWDEPS)
283 device = -1;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100284 up(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 if (put_user(device, (int __user *)arg))
286 return -EFAULT;
287 return 0;
288 }
289 case SNDRV_CTL_IOCTL_HWDEP_INFO:
290 {
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100291 struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100292 int device, err;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100293 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
295 if (get_user(device, &info->device))
296 return -EFAULT;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100297 down(&register_mutex);
298 hwdep = snd_hwdep_search(card, device);
299 if (hwdep)
300 err = snd_hwdep_info(hwdep, info);
301 else
302 err = -ENXIO;
303 up(&register_mutex);
304 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 }
306 }
307 return -ENOIOCTLCMD;
308}
309
310#ifdef CONFIG_COMPAT
311#include "hwdep_compat.c"
312#else
313#define snd_hwdep_ioctl_compat NULL
314#endif
315
316/*
317
318 */
319
320static struct file_operations snd_hwdep_f_ops =
321{
322 .owner = THIS_MODULE,
323 .llseek = snd_hwdep_llseek,
324 .read = snd_hwdep_read,
325 .write = snd_hwdep_write,
326 .open = snd_hwdep_open,
327 .release = snd_hwdep_release,
328 .poll = snd_hwdep_poll,
329 .unlocked_ioctl = snd_hwdep_ioctl,
330 .compat_ioctl = snd_hwdep_ioctl_compat,
331 .mmap = snd_hwdep_mmap,
332};
333
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334/**
335 * snd_hwdep_new - create a new hwdep instance
336 * @card: the card instance
337 * @id: the id string
338 * @device: the device index (zero-based)
339 * @rhwdep: the pointer to store the new hwdep instance
340 *
341 * Creates a new hwdep instance with the given index on the card.
342 * The callbacks (hwdep->ops) must be set on the returned instance
343 * after this call manually by the caller.
344 *
345 * Returns zero if successful, or a negative error code on failure.
346 */
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100347int snd_hwdep_new(struct snd_card *card, char *id, int device,
348 struct snd_hwdep **rhwdep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100350 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 int err;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100352 static struct snd_device_ops ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 .dev_free = snd_hwdep_dev_free,
354 .dev_register = snd_hwdep_dev_register,
355 .dev_unregister = snd_hwdep_dev_unregister
356 };
357
358 snd_assert(rhwdep != NULL, return -EINVAL);
359 *rhwdep = NULL;
360 snd_assert(card != NULL, return -ENXIO);
Takashi Iwaica2c0962005-09-09 14:20:23 +0200361 hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL);
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100362 if (hwdep == NULL) {
363 snd_printk(KERN_ERR "hwdep: cannot allocate\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 return -ENOMEM;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100365 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 hwdep->card = card;
367 hwdep->device = device;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100368 if (id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 strlcpy(hwdep->id, id, sizeof(hwdep->id));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370#ifdef CONFIG_SND_OSSEMUL
371 hwdep->oss_type = -1;
372#endif
373 if ((err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops)) < 0) {
374 snd_hwdep_free(hwdep);
375 return err;
376 }
377 init_waitqueue_head(&hwdep->open_wait);
378 init_MUTEX(&hwdep->open_mutex);
379 *rhwdep = hwdep;
380 return 0;
381}
382
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100383static int snd_hwdep_free(struct snd_hwdep *hwdep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384{
385 snd_assert(hwdep != NULL, return -ENXIO);
386 if (hwdep->private_free)
387 hwdep->private_free(hwdep);
388 kfree(hwdep);
389 return 0;
390}
391
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100392static int snd_hwdep_dev_free(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100394 struct snd_hwdep *hwdep = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 return snd_hwdep_free(hwdep);
396}
397
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100398static int snd_hwdep_dev_register(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100400 struct snd_hwdep *hwdep = device->device_data;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100401 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 char name[32];
403
404 down(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100405 if (snd_hwdep_search(hwdep->card, hwdep->device)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 up(&register_mutex);
407 return -EBUSY;
408 }
Clemens Ladischf87135f2005-11-20 14:06:59 +0100409 list_add_tail(&hwdep->list, &snd_hwdep_devices);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device);
411 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP,
412 hwdep->card, hwdep->device,
Clemens Ladischf87135f2005-11-20 14:06:59 +0100413 &snd_hwdep_f_ops, hwdep, name)) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n",
415 hwdep->card->number, hwdep->device);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100416 list_del(&hwdep->list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 up(&register_mutex);
418 return err;
419 }
420#ifdef CONFIG_SND_OSSEMUL
421 hwdep->ossreg = 0;
422 if (hwdep->oss_type >= 0) {
423 if ((hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM) && (hwdep->device != 0)) {
424 snd_printk (KERN_WARNING "only hwdep device 0 can be registered as OSS direct FM device!\n");
425 } else {
426 if (snd_register_oss_device(hwdep->oss_type,
427 hwdep->card, hwdep->device,
Clemens Ladischf87135f2005-11-20 14:06:59 +0100428 &snd_hwdep_f_ops, hwdep,
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100429 hwdep->oss_dev) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 snd_printk(KERN_ERR "unable to register OSS compatibility device %i:%i\n",
431 hwdep->card->number, hwdep->device);
432 } else
433 hwdep->ossreg = 1;
434 }
435 }
436#endif
437 up(&register_mutex);
438 return 0;
439}
440
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100441static int snd_hwdep_dev_unregister(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100443 struct snd_hwdep *hwdep = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
445 snd_assert(hwdep != NULL, return -ENXIO);
446 down(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100447 if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 up(&register_mutex);
449 return -EINVAL;
450 }
451#ifdef CONFIG_SND_OSSEMUL
452 if (hwdep->ossreg)
453 snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device);
454#endif
455 snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100456 list_del(&hwdep->list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 up(&register_mutex);
458 return snd_hwdep_free(hwdep);
459}
460
Takashi Iwaie28563c2005-12-01 10:42:42 +0100461#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462/*
463 * Info interface
464 */
465
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100466static void snd_hwdep_proc_read(struct snd_info_entry *entry,
467 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468{
Clemens Ladischf87135f2005-11-20 14:06:59 +0100469 struct list_head *p;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100470 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
472 down(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100473 list_for_each(p, &snd_hwdep_devices) {
474 hwdep = list_entry(p, struct snd_hwdep, list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 snd_iprintf(buffer, "%02i-%02i: %s\n",
Clemens Ladischf87135f2005-11-20 14:06:59 +0100476 hwdep->card->number, hwdep->device, hwdep->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 }
478 up(&register_mutex);
479}
480
Takashi Iwaie28563c2005-12-01 10:42:42 +0100481static struct snd_info_entry *snd_hwdep_proc_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
Takashi Iwaie28563c2005-12-01 10:42:42 +0100483static void __init snd_hwdep_proc_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100485 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100488 entry->c.text.read_size = PAGE_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 entry->c.text.read = snd_hwdep_proc_read;
490 if (snd_info_register(entry) < 0) {
491 snd_info_free_entry(entry);
492 entry = NULL;
493 }
494 }
495 snd_hwdep_proc_entry = entry;
Takashi Iwaie28563c2005-12-01 10:42:42 +0100496}
497
498static void __exit snd_hwdep_proc_done(void)
499{
500 snd_info_unregister(snd_hwdep_proc_entry);
501}
502#else /* !CONFIG_PROC_FS */
503#define snd_hwdep_proc_init()
504#define snd_hwdep_proc_done()
505#endif /* CONFIG_PROC_FS */
506
507
508/*
509 * ENTRY functions
510 */
511
512static int __init alsa_hwdep_init(void)
513{
514 snd_hwdep_proc_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 snd_ctl_register_ioctl(snd_hwdep_control_ioctl);
516 snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl);
517 return 0;
518}
519
520static void __exit alsa_hwdep_exit(void)
521{
522 snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl);
523 snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl);
Takashi Iwaie28563c2005-12-01 10:42:42 +0100524 snd_hwdep_proc_done();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525}
526
527module_init(alsa_hwdep_init)
528module_exit(alsa_hwdep_exit)
529
530EXPORT_SYMBOL(snd_hwdep_new);