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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Hardware dependent layer
Jaroslav Kyselac1017a42007-10-15 09:50:19 +02003 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/slab.h>
26#include <linux/time.h>
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010027#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#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
Jaroslav Kyselac1017a42007-10-15 09:50:19 +020034MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
Linus Torvalds1da177e2005-04-16 15:20:36 -070035MODULE_DESCRIPTION("Hardware dependent layer");
36MODULE_LICENSE("GPL");
37
Clemens Ladischf87135f2005-11-20 14:06:59 +010038static LIST_HEAD(snd_hwdep_devices);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010039static DEFINE_MUTEX(register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
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);
Takashi Iwaic4614822006-06-23 14:38:23 +020044static int snd_hwdep_dev_disconnect(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{
Clemens Ladischf87135f2005-11-20 14:06:59 +010049 struct snd_hwdep *hwdep;
50
Johannes Berg9244b2c2006-10-05 16:02:22 +020051 list_for_each_entry(hwdep, &snd_hwdep_devices, list)
Clemens Ladischf87135f2005-11-20 14:06:59 +010052 if (hwdep->card == card && hwdep->device == device)
53 return hwdep;
Clemens Ladischf87135f2005-11-20 14:06:59 +010054 return NULL;
55}
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57static loff_t snd_hwdep_llseek(struct file * file, loff_t offset, int orig)
58{
Takashi Iwaid9a98de2005-11-17 13:58:21 +010059 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 if (hw->ops.llseek)
61 return hw->ops.llseek(hw, file, offset, orig);
62 return -ENXIO;
63}
64
Takashi Iwaid9a98de2005-11-17 13:58:21 +010065static ssize_t snd_hwdep_read(struct file * file, char __user *buf,
66 size_t count, loff_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -070067{
Takashi Iwaid9a98de2005-11-17 13:58:21 +010068 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 if (hw->ops.read)
70 return hw->ops.read(hw, buf, count, offset);
71 return -ENXIO;
72}
73
Takashi Iwaid9a98de2005-11-17 13:58:21 +010074static ssize_t snd_hwdep_write(struct file * file, const char __user *buf,
75 size_t count, loff_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -070076{
Takashi Iwaid9a98de2005-11-17 13:58:21 +010077 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 if (hw->ops.write)
79 return hw->ops.write(hw, buf, count, offset);
80 return -ENXIO;
81}
82
83static int snd_hwdep_open(struct inode *inode, struct file * file)
84{
85 int major = imajor(inode);
Takashi Iwaid9a98de2005-11-17 13:58:21 +010086 struct snd_hwdep *hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 int err;
88 wait_queue_t wait;
89
Clemens Ladischf1902862005-10-24 17:05:03 +020090 if (major == snd_major) {
Clemens Ladischf87135f2005-11-20 14:06:59 +010091 hw = snd_lookup_minor_data(iminor(inode),
92 SNDRV_DEVICE_TYPE_HWDEP);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093#ifdef CONFIG_SND_OSSEMUL
Clemens Ladischf1902862005-10-24 17:05:03 +020094 } else if (major == SOUND_MAJOR) {
Clemens Ladischf87135f2005-11-20 14:06:59 +010095 hw = snd_lookup_oss_minor_data(iminor(inode),
96 SNDRV_OSS_DEVICE_TYPE_DMFM);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097#endif
Clemens Ladischf1902862005-10-24 17:05:03 +020098 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 if (hw == NULL)
101 return -ENODEV;
102
103 if (!hw->ops.open)
104 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
106 if (!try_module_get(hw->card->module))
107 return -EFAULT;
108
109 init_waitqueue_entry(&wait, current);
110 add_wait_queue(&hw->open_wait, &wait);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100111 mutex_lock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 while (1) {
113 if (hw->exclusive && hw->used > 0) {
114 err = -EBUSY;
115 break;
116 }
117 err = hw->ops.open(hw, file);
118 if (err >= 0)
119 break;
120 if (err == -EAGAIN) {
121 if (file->f_flags & O_NONBLOCK) {
122 err = -EBUSY;
123 break;
124 }
125 } else
126 break;
127 set_current_state(TASK_INTERRUPTIBLE);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100128 mutex_unlock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 schedule();
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100130 mutex_lock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 if (signal_pending(current)) {
132 err = -ERESTARTSYS;
133 break;
134 }
135 }
136 remove_wait_queue(&hw->open_wait, &wait);
137 if (err >= 0) {
138 err = snd_card_file_add(hw->card, file);
139 if (err >= 0) {
140 file->private_data = hw;
141 hw->used++;
142 } else {
143 if (hw->ops.release)
144 hw->ops.release(hw, file);
145 }
146 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100147 mutex_unlock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 if (err < 0)
149 module_put(hw->card->module);
150 return err;
151}
152
153static int snd_hwdep_release(struct inode *inode, struct file * file)
154{
155 int err = -ENXIO;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100156 struct snd_hwdep *hw = file->private_data;
Florin Malita104326f2006-09-29 12:55:25 +0200157 struct module *mod = hw->card->module;
Karsten Wiese8fa58af2007-01-31 10:05:30 +0100158
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100159 mutex_lock(&hw->open_mutex);
Karsten Wiese8fa58af2007-01-31 10:05:30 +0100160 if (hw->ops.release)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 err = hw->ops.release(hw, file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 if (hw->used > 0)
163 hw->used--;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100164 mutex_unlock(&hw->open_mutex);
Karsten Wiese8fa58af2007-01-31 10:05:30 +0100165 wake_up(&hw->open_wait);
166
167 snd_card_file_remove(hw->card, file);
Florin Malita104326f2006-09-29 12:55:25 +0200168 module_put(mod);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 return err;
170}
171
172static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait)
173{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100174 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 if (hw->ops.poll)
176 return hw->ops.poll(hw, file, wait);
177 return 0;
178}
179
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100180static int snd_hwdep_info(struct snd_hwdep *hw,
181 struct snd_hwdep_info __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100183 struct snd_hwdep_info info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
185 memset(&info, 0, sizeof(info));
186 info.card = hw->card->number;
187 strlcpy(info.id, hw->id, sizeof(info.id));
188 strlcpy(info.name, hw->name, sizeof(info.name));
189 info.iface = hw->iface;
190 if (copy_to_user(_info, &info, sizeof(info)))
191 return -EFAULT;
192 return 0;
193}
194
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100195static int snd_hwdep_dsp_status(struct snd_hwdep *hw,
196 struct snd_hwdep_dsp_status __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100198 struct snd_hwdep_dsp_status info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 int err;
200
201 if (! hw->ops.dsp_status)
202 return -ENXIO;
203 memset(&info, 0, sizeof(info));
204 info.dsp_loaded = hw->dsp_loaded;
205 if ((err = hw->ops.dsp_status(hw, &info)) < 0)
206 return err;
207 if (copy_to_user(_info, &info, sizeof(info)))
208 return -EFAULT;
209 return 0;
210}
211
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100212static int snd_hwdep_dsp_load(struct snd_hwdep *hw,
213 struct snd_hwdep_dsp_image __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100215 struct snd_hwdep_dsp_image info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 int err;
217
218 if (! hw->ops.dsp_load)
219 return -ENXIO;
220 memset(&info, 0, sizeof(info));
221 if (copy_from_user(&info, _info, sizeof(info)))
222 return -EFAULT;
223 /* check whether the dsp was already loaded */
224 if (hw->dsp_loaded & (1 << info.index))
225 return -EBUSY;
226 if (!access_ok(VERIFY_READ, info.image, info.length))
227 return -EFAULT;
228 err = hw->ops.dsp_load(hw, &info);
229 if (err < 0)
230 return err;
231 hw->dsp_loaded |= (1 << info.index);
232 return 0;
233}
234
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100235static long snd_hwdep_ioctl(struct file * file, unsigned int cmd,
236 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100238 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 void __user *argp = (void __user *)arg;
240 switch (cmd) {
241 case SNDRV_HWDEP_IOCTL_PVERSION:
242 return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp);
243 case SNDRV_HWDEP_IOCTL_INFO:
244 return snd_hwdep_info(hw, argp);
245 case SNDRV_HWDEP_IOCTL_DSP_STATUS:
246 return snd_hwdep_dsp_status(hw, argp);
247 case SNDRV_HWDEP_IOCTL_DSP_LOAD:
248 return snd_hwdep_dsp_load(hw, argp);
249 }
250 if (hw->ops.ioctl)
251 return hw->ops.ioctl(hw, file, cmd, arg);
252 return -ENOTTY;
253}
254
255static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma)
256{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100257 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 if (hw->ops.mmap)
259 return hw->ops.mmap(hw, file, vma);
260 return -ENXIO;
261}
262
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100263static int snd_hwdep_control_ioctl(struct snd_card *card,
264 struct snd_ctl_file * control,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 unsigned int cmd, unsigned long arg)
266{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 switch (cmd) {
268 case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE:
269 {
270 int device;
271
272 if (get_user(device, (int __user *)arg))
273 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100274 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 device = device < 0 ? 0 : device + 1;
276 while (device < SNDRV_MINOR_HWDEPS) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100277 if (snd_hwdep_search(card, device))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 break;
279 device++;
280 }
281 if (device >= SNDRV_MINOR_HWDEPS)
282 device = -1;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100283 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 if (put_user(device, (int __user *)arg))
285 return -EFAULT;
286 return 0;
287 }
288 case SNDRV_CTL_IOCTL_HWDEP_INFO:
289 {
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100290 struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100291 int device, err;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100292 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
294 if (get_user(device, &info->device))
295 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100296 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100297 hwdep = snd_hwdep_search(card, device);
298 if (hwdep)
299 err = snd_hwdep_info(hwdep, info);
300 else
301 err = -ENXIO;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100302 mutex_unlock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100303 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 }
305 }
306 return -ENOIOCTLCMD;
307}
308
309#ifdef CONFIG_COMPAT
310#include "hwdep_compat.c"
311#else
312#define snd_hwdep_ioctl_compat NULL
313#endif
314
315/*
316
317 */
318
Arjan van de Ven9c2e08c2007-02-12 00:55:37 -0800319static const struct file_operations snd_hwdep_f_ops =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320{
321 .owner = THIS_MODULE,
322 .llseek = snd_hwdep_llseek,
323 .read = snd_hwdep_read,
324 .write = snd_hwdep_write,
325 .open = snd_hwdep_open,
326 .release = snd_hwdep_release,
327 .poll = snd_hwdep_poll,
328 .unlocked_ioctl = snd_hwdep_ioctl,
329 .compat_ioctl = snd_hwdep_ioctl_compat,
330 .mmap = snd_hwdep_mmap,
331};
332
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333/**
334 * snd_hwdep_new - create a new hwdep instance
335 * @card: the card instance
336 * @id: the id string
337 * @device: the device index (zero-based)
338 * @rhwdep: the pointer to store the new hwdep instance
339 *
340 * Creates a new hwdep instance with the given index on the card.
341 * The callbacks (hwdep->ops) must be set on the returned instance
342 * after this call manually by the caller.
343 *
344 * Returns zero if successful, or a negative error code on failure.
345 */
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100346int snd_hwdep_new(struct snd_card *card, char *id, int device,
347 struct snd_hwdep **rhwdep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100349 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 int err;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100351 static struct snd_device_ops ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 .dev_free = snd_hwdep_dev_free,
353 .dev_register = snd_hwdep_dev_register,
Takashi Iwaic4614822006-06-23 14:38:23 +0200354 .dev_disconnect = snd_hwdep_dev_disconnect,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 };
356
357 snd_assert(rhwdep != NULL, return -EINVAL);
358 *rhwdep = NULL;
359 snd_assert(card != NULL, return -ENXIO);
Takashi Iwaica2c0962005-09-09 14:20:23 +0200360 hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL);
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100361 if (hwdep == NULL) {
362 snd_printk(KERN_ERR "hwdep: cannot allocate\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 return -ENOMEM;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100364 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 hwdep->card = card;
366 hwdep->device = device;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100367 if (id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 strlcpy(hwdep->id, id, sizeof(hwdep->id));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369#ifdef CONFIG_SND_OSSEMUL
370 hwdep->oss_type = -1;
371#endif
372 if ((err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops)) < 0) {
373 snd_hwdep_free(hwdep);
374 return err;
375 }
376 init_waitqueue_head(&hwdep->open_wait);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100377 mutex_init(&hwdep->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 *rhwdep = hwdep;
379 return 0;
380}
381
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100382static int snd_hwdep_free(struct snd_hwdep *hwdep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383{
384 snd_assert(hwdep != NULL, return -ENXIO);
385 if (hwdep->private_free)
386 hwdep->private_free(hwdep);
387 kfree(hwdep);
388 return 0;
389}
390
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100391static int snd_hwdep_dev_free(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100393 struct snd_hwdep *hwdep = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 return snd_hwdep_free(hwdep);
395}
396
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100397static int snd_hwdep_dev_register(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100399 struct snd_hwdep *hwdep = device->device_data;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100400 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 char name[32];
402
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100403 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100404 if (snd_hwdep_search(hwdep->card, hwdep->device)) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100405 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 return -EBUSY;
407 }
Clemens Ladischf87135f2005-11-20 14:06:59 +0100408 list_add_tail(&hwdep->list, &snd_hwdep_devices);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device);
410 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP,
411 hwdep->card, hwdep->device,
Clemens Ladischf87135f2005-11-20 14:06:59 +0100412 &snd_hwdep_f_ops, hwdep, name)) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n",
414 hwdep->card->number, hwdep->device);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100415 list_del(&hwdep->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100416 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 return err;
418 }
419#ifdef CONFIG_SND_OSSEMUL
420 hwdep->ossreg = 0;
421 if (hwdep->oss_type >= 0) {
422 if ((hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM) && (hwdep->device != 0)) {
423 snd_printk (KERN_WARNING "only hwdep device 0 can be registered as OSS direct FM device!\n");
424 } else {
425 if (snd_register_oss_device(hwdep->oss_type,
426 hwdep->card, hwdep->device,
Clemens Ladischf87135f2005-11-20 14:06:59 +0100427 &snd_hwdep_f_ops, hwdep,
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100428 hwdep->oss_dev) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 snd_printk(KERN_ERR "unable to register OSS compatibility device %i:%i\n",
430 hwdep->card->number, hwdep->device);
431 } else
432 hwdep->ossreg = 1;
433 }
434 }
435#endif
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100436 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 return 0;
438}
439
Takashi Iwaic4614822006-06-23 14:38:23 +0200440static int snd_hwdep_dev_disconnect(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100442 struct snd_hwdep *hwdep = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
444 snd_assert(hwdep != NULL, return -ENXIO);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100445 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100446 if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100447 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 return -EINVAL;
449 }
450#ifdef CONFIG_SND_OSSEMUL
451 if (hwdep->ossreg)
452 snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device);
453#endif
454 snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device);
Takashi Iwaic4614822006-06-23 14:38:23 +0200455 list_del_init(&hwdep->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100456 mutex_unlock(&register_mutex);
Takashi Iwaic4614822006-06-23 14:38:23 +0200457 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458}
459
Takashi Iwaie28563c2005-12-01 10:42:42 +0100460#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461/*
462 * Info interface
463 */
464
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100465static void snd_hwdep_proc_read(struct snd_info_entry *entry,
466 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100468 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100470 mutex_lock(&register_mutex);
Johannes Berg9244b2c2006-10-05 16:02:22 +0200471 list_for_each_entry(hwdep, &snd_hwdep_devices, list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 snd_iprintf(buffer, "%02i-%02i: %s\n",
Clemens Ladischf87135f2005-11-20 14:06:59 +0100473 hwdep->card->number, hwdep->device, hwdep->name);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100474 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475}
476
Takashi Iwaie28563c2005-12-01 10:42:42 +0100477static struct snd_info_entry *snd_hwdep_proc_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Takashi Iwaie28563c2005-12-01 10:42:42 +0100479static void __init snd_hwdep_proc_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100481 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 entry->c.text.read = snd_hwdep_proc_read;
485 if (snd_info_register(entry) < 0) {
486 snd_info_free_entry(entry);
487 entry = NULL;
488 }
489 }
490 snd_hwdep_proc_entry = entry;
Takashi Iwaie28563c2005-12-01 10:42:42 +0100491}
492
493static void __exit snd_hwdep_proc_done(void)
494{
Takashi Iwai746d4a02006-06-23 14:37:59 +0200495 snd_info_free_entry(snd_hwdep_proc_entry);
Takashi Iwaie28563c2005-12-01 10:42:42 +0100496}
497#else /* !CONFIG_PROC_FS */
498#define snd_hwdep_proc_init()
499#define snd_hwdep_proc_done()
500#endif /* CONFIG_PROC_FS */
501
502
503/*
504 * ENTRY functions
505 */
506
507static int __init alsa_hwdep_init(void)
508{
509 snd_hwdep_proc_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 snd_ctl_register_ioctl(snd_hwdep_control_ioctl);
511 snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl);
512 return 0;
513}
514
515static void __exit alsa_hwdep_exit(void)
516{
517 snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl);
518 snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl);
Takashi Iwaie28563c2005-12-01 10:42:42 +0100519 snd_hwdep_proc_done();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520}
521
522module_init(alsa_hwdep_init)
523module_exit(alsa_hwdep_exit)
524
525EXPORT_SYMBOL(snd_hwdep_new);