blob: 75ea16f35b1aa1e1db985802e923c86e28f69af3 [file] [log] [blame]
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/major.h>
23#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/slab.h>
25#include <linux/time.h>
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010026#include <linux/mutex.h>
Paul Gortmakerda155d52011-07-15 12:38:28 -040027#include <linux/module.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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 if (!try_module_get(hw->card->module))
104 return -EFAULT;
105
106 init_waitqueue_entry(&wait, current);
107 add_wait_queue(&hw->open_wait, &wait);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100108 mutex_lock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 while (1) {
110 if (hw->exclusive && hw->used > 0) {
111 err = -EBUSY;
112 break;
113 }
Takashi Iwai345d0b12009-02-05 09:10:20 +0100114 if (!hw->ops.open) {
115 err = 0;
116 break;
117 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 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);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100129 mutex_unlock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 schedule();
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100131 mutex_lock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 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 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100148 mutex_unlock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 if (err < 0)
150 module_put(hw->card->module);
151 return err;
152}
153
154static int snd_hwdep_release(struct inode *inode, struct file * file)
155{
Takashi Iwai345d0b12009-02-05 09:10:20 +0100156 int err = 0;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100157 struct snd_hwdep *hw = file->private_data;
Florin Malita104326f2006-09-29 12:55:25 +0200158 struct module *mod = hw->card->module;
Karsten Wiese8fa58af2007-01-31 10:05:30 +0100159
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100160 mutex_lock(&hw->open_mutex);
Karsten Wiese8fa58af2007-01-31 10:05:30 +0100161 if (hw->ops.release)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 err = hw->ops.release(hw, file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 if (hw->used > 0)
164 hw->used--;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100165 mutex_unlock(&hw->open_mutex);
Karsten Wiese8fa58af2007-01-31 10:05:30 +0100166 wake_up(&hw->open_wait);
167
168 snd_card_file_remove(hw->card, file);
Florin Malita104326f2006-09-29 12:55:25 +0200169 module_put(mod);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 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;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100275 mutex_lock(&register_mutex);
Dan Carpenterf7b2bb82011-10-28 09:46:01 +0300276
277 if (device < 0)
278 device = 0;
279 else if (device < SNDRV_MINOR_HWDEPS)
280 device++;
281 else
282 device = SNDRV_MINOR_HWDEPS;
283
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 while (device < SNDRV_MINOR_HWDEPS) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100285 if (snd_hwdep_search(card, device))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 break;
287 device++;
288 }
289 if (device >= SNDRV_MINOR_HWDEPS)
290 device = -1;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100291 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 if (put_user(device, (int __user *)arg))
293 return -EFAULT;
294 return 0;
295 }
296 case SNDRV_CTL_IOCTL_HWDEP_INFO:
297 {
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100298 struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100299 int device, err;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100300 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
302 if (get_user(device, &info->device))
303 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100304 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100305 hwdep = snd_hwdep_search(card, device);
306 if (hwdep)
307 err = snd_hwdep_info(hwdep, info);
308 else
309 err = -ENXIO;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100310 mutex_unlock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100311 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 }
313 }
314 return -ENOIOCTLCMD;
315}
316
317#ifdef CONFIG_COMPAT
318#include "hwdep_compat.c"
319#else
320#define snd_hwdep_ioctl_compat NULL
321#endif
322
323/*
324
325 */
326
Arjan van de Ven9c2e08c2007-02-12 00:55:37 -0800327static const struct file_operations snd_hwdep_f_ops =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328{
329 .owner = THIS_MODULE,
330 .llseek = snd_hwdep_llseek,
331 .read = snd_hwdep_read,
332 .write = snd_hwdep_write,
333 .open = snd_hwdep_open,
334 .release = snd_hwdep_release,
335 .poll = snd_hwdep_poll,
336 .unlocked_ioctl = snd_hwdep_ioctl,
337 .compat_ioctl = snd_hwdep_ioctl_compat,
338 .mmap = snd_hwdep_mmap,
339};
340
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341/**
342 * snd_hwdep_new - create a new hwdep instance
343 * @card: the card instance
344 * @id: the id string
345 * @device: the device index (zero-based)
346 * @rhwdep: the pointer to store the new hwdep instance
347 *
348 * Creates a new hwdep instance with the given index on the card.
349 * The callbacks (hwdep->ops) must be set on the returned instance
350 * after this call manually by the caller.
351 *
352 * Returns zero if successful, or a negative error code on failure.
353 */
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100354int snd_hwdep_new(struct snd_card *card, char *id, int device,
355 struct snd_hwdep **rhwdep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100357 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 int err;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100359 static struct snd_device_ops ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 .dev_free = snd_hwdep_dev_free,
361 .dev_register = snd_hwdep_dev_register,
Takashi Iwaic4614822006-06-23 14:38:23 +0200362 .dev_disconnect = snd_hwdep_dev_disconnect,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 };
364
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200365 if (snd_BUG_ON(!card))
366 return -ENXIO;
367 if (rhwdep)
368 *rhwdep = NULL;
Takashi Iwaica2c0962005-09-09 14:20:23 +0200369 hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL);
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100370 if (hwdep == NULL) {
371 snd_printk(KERN_ERR "hwdep: cannot allocate\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 return -ENOMEM;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100373 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 hwdep->card = card;
375 hwdep->device = device;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100376 if (id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 strlcpy(hwdep->id, id, sizeof(hwdep->id));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378#ifdef CONFIG_SND_OSSEMUL
379 hwdep->oss_type = -1;
380#endif
381 if ((err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops)) < 0) {
382 snd_hwdep_free(hwdep);
383 return err;
384 }
385 init_waitqueue_head(&hwdep->open_wait);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100386 mutex_init(&hwdep->open_mutex);
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200387 if (rhwdep)
388 *rhwdep = hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 return 0;
390}
391
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100392static int snd_hwdep_free(struct snd_hwdep *hwdep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393{
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200394 if (!hwdep)
395 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 if (hwdep->private_free)
397 hwdep->private_free(hwdep);
398 kfree(hwdep);
399 return 0;
400}
401
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100402static int snd_hwdep_dev_free(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100404 struct snd_hwdep *hwdep = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 return snd_hwdep_free(hwdep);
406}
407
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100408static int snd_hwdep_dev_register(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100410 struct snd_hwdep *hwdep = device->device_data;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100411 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 char name[32];
413
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100414 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100415 if (snd_hwdep_search(hwdep->card, hwdep->device)) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100416 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 return -EBUSY;
418 }
Clemens Ladischf87135f2005-11-20 14:06:59 +0100419 list_add_tail(&hwdep->list, &snd_hwdep_devices);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device);
421 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP,
422 hwdep->card, hwdep->device,
Clemens Ladischf87135f2005-11-20 14:06:59 +0100423 &snd_hwdep_f_ops, hwdep, name)) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n",
425 hwdep->card->number, hwdep->device);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100426 list_del(&hwdep->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100427 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 return err;
429 }
430#ifdef CONFIG_SND_OSSEMUL
431 hwdep->ossreg = 0;
432 if (hwdep->oss_type >= 0) {
433 if ((hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM) && (hwdep->device != 0)) {
434 snd_printk (KERN_WARNING "only hwdep device 0 can be registered as OSS direct FM device!\n");
435 } else {
436 if (snd_register_oss_device(hwdep->oss_type,
437 hwdep->card, hwdep->device,
Clemens Ladischf87135f2005-11-20 14:06:59 +0100438 &snd_hwdep_f_ops, hwdep,
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100439 hwdep->oss_dev) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 snd_printk(KERN_ERR "unable to register OSS compatibility device %i:%i\n",
441 hwdep->card->number, hwdep->device);
442 } else
443 hwdep->ossreg = 1;
444 }
445 }
446#endif
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100447 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 return 0;
449}
450
Takashi Iwaic4614822006-06-23 14:38:23 +0200451static int snd_hwdep_dev_disconnect(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100453 struct snd_hwdep *hwdep = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200455 if (snd_BUG_ON(!hwdep))
456 return -ENXIO;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100457 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100458 if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100459 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 return -EINVAL;
461 }
462#ifdef CONFIG_SND_OSSEMUL
463 if (hwdep->ossreg)
464 snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device);
465#endif
466 snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device);
Takashi Iwaic4614822006-06-23 14:38:23 +0200467 list_del_init(&hwdep->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100468 mutex_unlock(&register_mutex);
Takashi Iwaic4614822006-06-23 14:38:23 +0200469 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470}
471
Takashi Iwaie28563c2005-12-01 10:42:42 +0100472#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473/*
474 * Info interface
475 */
476
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100477static void snd_hwdep_proc_read(struct snd_info_entry *entry,
478 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100480 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100482 mutex_lock(&register_mutex);
Johannes Berg9244b2c2006-10-05 16:02:22 +0200483 list_for_each_entry(hwdep, &snd_hwdep_devices, list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 snd_iprintf(buffer, "%02i-%02i: %s\n",
Clemens Ladischf87135f2005-11-20 14:06:59 +0100485 hwdep->card->number, hwdep->device, hwdep->name);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100486 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487}
488
Takashi Iwaie28563c2005-12-01 10:42:42 +0100489static struct snd_info_entry *snd_hwdep_proc_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
Takashi Iwaie28563c2005-12-01 10:42:42 +0100491static void __init snd_hwdep_proc_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100493 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 entry->c.text.read = snd_hwdep_proc_read;
497 if (snd_info_register(entry) < 0) {
498 snd_info_free_entry(entry);
499 entry = NULL;
500 }
501 }
502 snd_hwdep_proc_entry = entry;
Takashi Iwaie28563c2005-12-01 10:42:42 +0100503}
504
505static void __exit snd_hwdep_proc_done(void)
506{
Takashi Iwai746d4a02006-06-23 14:37:59 +0200507 snd_info_free_entry(snd_hwdep_proc_entry);
Takashi Iwaie28563c2005-12-01 10:42:42 +0100508}
509#else /* !CONFIG_PROC_FS */
510#define snd_hwdep_proc_init()
511#define snd_hwdep_proc_done()
512#endif /* CONFIG_PROC_FS */
513
514
515/*
516 * ENTRY functions
517 */
518
519static int __init alsa_hwdep_init(void)
520{
521 snd_hwdep_proc_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 snd_ctl_register_ioctl(snd_hwdep_control_ioctl);
523 snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl);
524 return 0;
525}
526
527static void __exit alsa_hwdep_exit(void)
528{
529 snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl);
530 snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl);
Takashi Iwaie28563c2005-12-01 10:42:42 +0100531 snd_hwdep_proc_done();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532}
533
534module_init(alsa_hwdep_init)
535module_exit(alsa_hwdep_exit)
536
537EXPORT_SYMBOL(snd_hwdep_new);