blob: 36d2416f90d994d9408ef75f3e332567a46ea470 [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_dev_free(struct snd_device *device);
42static int snd_hwdep_dev_register(struct snd_device *device);
Takashi Iwaic4614822006-06-23 14:38:23 +020043static int snd_hwdep_dev_disconnect(struct snd_device *device);
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
Clemens Ladischf87135f2005-11-20 14:06:59 +010046static struct snd_hwdep *snd_hwdep_search(struct snd_card *card, int device)
47{
Clemens Ladischf87135f2005-11-20 14:06:59 +010048 struct snd_hwdep *hwdep;
49
Johannes Berg9244b2c2006-10-05 16:02:22 +020050 list_for_each_entry(hwdep, &snd_hwdep_devices, list)
Clemens Ladischf87135f2005-11-20 14:06:59 +010051 if (hwdep->card == card && hwdep->device == device)
52 return hwdep;
Clemens Ladischf87135f2005-11-20 14:06:59 +010053 return NULL;
54}
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56static loff_t snd_hwdep_llseek(struct file * file, loff_t offset, int orig)
57{
Takashi Iwaid9a98de2005-11-17 13:58:21 +010058 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 if (hw->ops.llseek)
60 return hw->ops.llseek(hw, file, offset, orig);
61 return -ENXIO;
62}
63
Takashi Iwaid9a98de2005-11-17 13:58:21 +010064static ssize_t snd_hwdep_read(struct file * file, char __user *buf,
65 size_t count, loff_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
Takashi Iwaid9a98de2005-11-17 13:58:21 +010067 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 if (hw->ops.read)
69 return hw->ops.read(hw, buf, count, offset);
70 return -ENXIO;
71}
72
Takashi Iwaid9a98de2005-11-17 13:58:21 +010073static ssize_t snd_hwdep_write(struct file * file, const char __user *buf,
74 size_t count, loff_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -070075{
Takashi Iwaid9a98de2005-11-17 13:58:21 +010076 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 if (hw->ops.write)
78 return hw->ops.write(hw, buf, count, offset);
79 return -ENXIO;
80}
81
82static int snd_hwdep_open(struct inode *inode, struct file * file)
83{
84 int major = imajor(inode);
Takashi Iwaid9a98de2005-11-17 13:58:21 +010085 struct snd_hwdep *hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 int err;
87 wait_queue_t wait;
88
Clemens Ladischf1902862005-10-24 17:05:03 +020089 if (major == snd_major) {
Clemens Ladischf87135f2005-11-20 14:06:59 +010090 hw = snd_lookup_minor_data(iminor(inode),
91 SNDRV_DEVICE_TYPE_HWDEP);
Linus Torvalds1da177e2005-04-16 15:20:36 -070092#ifdef CONFIG_SND_OSSEMUL
Clemens Ladischf1902862005-10-24 17:05:03 +020093 } else if (major == SOUND_MAJOR) {
Clemens Ladischf87135f2005-11-20 14:06:59 +010094 hw = snd_lookup_oss_minor_data(iminor(inode),
95 SNDRV_OSS_DEVICE_TYPE_DMFM);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096#endif
Clemens Ladischf1902862005-10-24 17:05:03 +020097 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 if (hw == NULL)
100 return -ENODEV;
101
Takashi Iwaia0830db2012-10-16 13:05:59 +0200102 if (!try_module_get(hw->card->module)) {
103 snd_card_unref(hw->card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 return -EFAULT;
Takashi Iwaia0830db2012-10-16 13:05:59 +0200105 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
107 init_waitqueue_entry(&wait, current);
108 add_wait_queue(&hw->open_wait, &wait);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100109 mutex_lock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 while (1) {
111 if (hw->exclusive && hw->used > 0) {
112 err = -EBUSY;
113 break;
114 }
Takashi Iwai345d0b12009-02-05 09:10:20 +0100115 if (!hw->ops.open) {
116 err = 0;
117 break;
118 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 err = hw->ops.open(hw, file);
120 if (err >= 0)
121 break;
122 if (err == -EAGAIN) {
123 if (file->f_flags & O_NONBLOCK) {
124 err = -EBUSY;
125 break;
126 }
127 } else
128 break;
129 set_current_state(TASK_INTERRUPTIBLE);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100130 mutex_unlock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 schedule();
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100132 mutex_lock(&hw->open_mutex);
Takashi Iwai0914f792012-10-16 16:43:39 +0200133 if (hw->card->shutdown) {
134 err = -ENODEV;
135 break;
136 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 if (signal_pending(current)) {
138 err = -ERESTARTSYS;
139 break;
140 }
141 }
142 remove_wait_queue(&hw->open_wait, &wait);
143 if (err >= 0) {
144 err = snd_card_file_add(hw->card, file);
145 if (err >= 0) {
146 file->private_data = hw;
147 hw->used++;
148 } else {
149 if (hw->ops.release)
150 hw->ops.release(hw, file);
151 }
152 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100153 mutex_unlock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 if (err < 0)
155 module_put(hw->card->module);
Takashi Iwaia0830db2012-10-16 13:05:59 +0200156 snd_card_unref(hw->card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 return err;
158}
159
160static int snd_hwdep_release(struct inode *inode, struct file * file)
161{
Takashi Iwai345d0b12009-02-05 09:10:20 +0100162 int err = 0;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100163 struct snd_hwdep *hw = file->private_data;
Florin Malita104326f2006-09-29 12:55:25 +0200164 struct module *mod = hw->card->module;
Karsten Wiese8fa58af2007-01-31 10:05:30 +0100165
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100166 mutex_lock(&hw->open_mutex);
Karsten Wiese8fa58af2007-01-31 10:05:30 +0100167 if (hw->ops.release)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 err = hw->ops.release(hw, file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 if (hw->used > 0)
170 hw->used--;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100171 mutex_unlock(&hw->open_mutex);
Karsten Wiese8fa58af2007-01-31 10:05:30 +0100172 wake_up(&hw->open_wait);
173
174 snd_card_file_remove(hw->card, file);
Florin Malita104326f2006-09-29 12:55:25 +0200175 module_put(mod);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 return err;
177}
178
179static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait)
180{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100181 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 if (hw->ops.poll)
183 return hw->ops.poll(hw, file, wait);
184 return 0;
185}
186
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100187static int snd_hwdep_info(struct snd_hwdep *hw,
188 struct snd_hwdep_info __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100190 struct snd_hwdep_info info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
192 memset(&info, 0, sizeof(info));
193 info.card = hw->card->number;
194 strlcpy(info.id, hw->id, sizeof(info.id));
195 strlcpy(info.name, hw->name, sizeof(info.name));
196 info.iface = hw->iface;
197 if (copy_to_user(_info, &info, sizeof(info)))
198 return -EFAULT;
199 return 0;
200}
201
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100202static int snd_hwdep_dsp_status(struct snd_hwdep *hw,
203 struct snd_hwdep_dsp_status __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100205 struct snd_hwdep_dsp_status info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 int err;
207
208 if (! hw->ops.dsp_status)
209 return -ENXIO;
210 memset(&info, 0, sizeof(info));
211 info.dsp_loaded = hw->dsp_loaded;
212 if ((err = hw->ops.dsp_status(hw, &info)) < 0)
213 return err;
214 if (copy_to_user(_info, &info, sizeof(info)))
215 return -EFAULT;
216 return 0;
217}
218
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100219static int snd_hwdep_dsp_load(struct snd_hwdep *hw,
220 struct snd_hwdep_dsp_image __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100222 struct snd_hwdep_dsp_image info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 int err;
224
225 if (! hw->ops.dsp_load)
226 return -ENXIO;
227 memset(&info, 0, sizeof(info));
228 if (copy_from_user(&info, _info, sizeof(info)))
229 return -EFAULT;
230 /* check whether the dsp was already loaded */
231 if (hw->dsp_loaded & (1 << info.index))
232 return -EBUSY;
233 if (!access_ok(VERIFY_READ, info.image, info.length))
234 return -EFAULT;
235 err = hw->ops.dsp_load(hw, &info);
236 if (err < 0)
237 return err;
238 hw->dsp_loaded |= (1 << info.index);
239 return 0;
240}
241
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100242static long snd_hwdep_ioctl(struct file * file, unsigned int cmd,
243 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100245 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 void __user *argp = (void __user *)arg;
247 switch (cmd) {
248 case SNDRV_HWDEP_IOCTL_PVERSION:
249 return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp);
250 case SNDRV_HWDEP_IOCTL_INFO:
251 return snd_hwdep_info(hw, argp);
252 case SNDRV_HWDEP_IOCTL_DSP_STATUS:
253 return snd_hwdep_dsp_status(hw, argp);
254 case SNDRV_HWDEP_IOCTL_DSP_LOAD:
255 return snd_hwdep_dsp_load(hw, argp);
256 }
257 if (hw->ops.ioctl)
258 return hw->ops.ioctl(hw, file, cmd, arg);
259 return -ENOTTY;
260}
261
262static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma)
263{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100264 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 if (hw->ops.mmap)
266 return hw->ops.mmap(hw, file, vma);
267 return -ENXIO;
268}
269
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100270static int snd_hwdep_control_ioctl(struct snd_card *card,
271 struct snd_ctl_file * control,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 unsigned int cmd, unsigned long arg)
273{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 switch (cmd) {
275 case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE:
276 {
277 int device;
278
279 if (get_user(device, (int __user *)arg))
280 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100281 mutex_lock(&register_mutex);
Dan Carpenterf7b2bb82011-10-28 09:46:01 +0300282
283 if (device < 0)
284 device = 0;
285 else if (device < SNDRV_MINOR_HWDEPS)
286 device++;
287 else
288 device = SNDRV_MINOR_HWDEPS;
289
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 while (device < SNDRV_MINOR_HWDEPS) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100291 if (snd_hwdep_search(card, device))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 break;
293 device++;
294 }
295 if (device >= SNDRV_MINOR_HWDEPS)
296 device = -1;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100297 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 if (put_user(device, (int __user *)arg))
299 return -EFAULT;
300 return 0;
301 }
302 case SNDRV_CTL_IOCTL_HWDEP_INFO:
303 {
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100304 struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100305 int device, err;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100306 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
308 if (get_user(device, &info->device))
309 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100310 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100311 hwdep = snd_hwdep_search(card, device);
312 if (hwdep)
313 err = snd_hwdep_info(hwdep, info);
314 else
315 err = -ENXIO;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100316 mutex_unlock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100317 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 }
319 }
320 return -ENOIOCTLCMD;
321}
322
323#ifdef CONFIG_COMPAT
324#include "hwdep_compat.c"
325#else
326#define snd_hwdep_ioctl_compat NULL
327#endif
328
329/*
330
331 */
332
Arjan van de Ven9c2e08c2007-02-12 00:55:37 -0800333static const struct file_operations snd_hwdep_f_ops =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334{
335 .owner = THIS_MODULE,
336 .llseek = snd_hwdep_llseek,
337 .read = snd_hwdep_read,
338 .write = snd_hwdep_write,
339 .open = snd_hwdep_open,
340 .release = snd_hwdep_release,
341 .poll = snd_hwdep_poll,
342 .unlocked_ioctl = snd_hwdep_ioctl,
343 .compat_ioctl = snd_hwdep_ioctl_compat,
344 .mmap = snd_hwdep_mmap,
345};
346
Takashi Iwai7b461602015-01-29 17:13:32 +0100347static void release_hwdep_device(struct device *dev)
348{
349 kfree(container_of(dev, struct snd_hwdep, dev));
350}
351
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352/**
353 * snd_hwdep_new - create a new hwdep instance
354 * @card: the card instance
355 * @id: the id string
356 * @device: the device index (zero-based)
357 * @rhwdep: the pointer to store the new hwdep instance
358 *
359 * Creates a new hwdep instance with the given index on the card.
360 * The callbacks (hwdep->ops) must be set on the returned instance
361 * after this call manually by the caller.
362 *
Yacine Belkadieb7c06e2013-03-11 22:05:14 +0100363 * Return: Zero if successful, or a negative error code on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 */
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100365int snd_hwdep_new(struct snd_card *card, char *id, int device,
366 struct snd_hwdep **rhwdep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100368 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 int err;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100370 static struct snd_device_ops ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 .dev_free = snd_hwdep_dev_free,
372 .dev_register = snd_hwdep_dev_register,
Takashi Iwaic4614822006-06-23 14:38:23 +0200373 .dev_disconnect = snd_hwdep_dev_disconnect,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 };
375
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200376 if (snd_BUG_ON(!card))
377 return -ENXIO;
378 if (rhwdep)
379 *rhwdep = NULL;
Takashi Iwaica2c0962005-09-09 14:20:23 +0200380 hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL);
Takashi Iwaiec0e9932015-03-10 15:42:14 +0100381 if (!hwdep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 return -ENOMEM;
Takashi Iwai7b461602015-01-29 17:13:32 +0100383
384 init_waitqueue_head(&hwdep->open_wait);
385 mutex_init(&hwdep->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 hwdep->card = card;
387 hwdep->device = device;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100388 if (id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 strlcpy(hwdep->id, id, sizeof(hwdep->id));
Takashi Iwai7b461602015-01-29 17:13:32 +0100390
391 snd_device_initialize(&hwdep->dev, card);
392 hwdep->dev.release = release_hwdep_device;
393 dev_set_name(&hwdep->dev, "hwC%iD%i", card->number, device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394#ifdef CONFIG_SND_OSSEMUL
395 hwdep->oss_type = -1;
396#endif
Takashi Iwai7b461602015-01-29 17:13:32 +0100397
398 err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops);
399 if (err < 0) {
400 put_device(&hwdep->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 return err;
402 }
Takashi Iwai7b461602015-01-29 17:13:32 +0100403
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200404 if (rhwdep)
405 *rhwdep = hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 return 0;
407}
Takashi Iwai6776a5d2014-02-27 16:00:17 +0100408EXPORT_SYMBOL(snd_hwdep_new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
Takashi Iwai7b461602015-01-29 17:13:32 +0100410static int snd_hwdep_dev_free(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411{
Takashi Iwai7b461602015-01-29 17:13:32 +0100412 struct snd_hwdep *hwdep = device->device_data;
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200413 if (!hwdep)
414 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 if (hwdep->private_free)
416 hwdep->private_free(hwdep);
Takashi Iwai7b461602015-01-29 17:13:32 +0100417 put_device(&hwdep->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 return 0;
419}
420
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100421static int snd_hwdep_dev_register(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100423 struct snd_hwdep *hwdep = device->device_data;
Takashi Iwai2ebef692014-02-04 18:21:54 +0100424 struct snd_card *card = hwdep->card;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100425 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100427 mutex_lock(&register_mutex);
Takashi Iwai2ebef692014-02-04 18:21:54 +0100428 if (snd_hwdep_search(card, hwdep->device)) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100429 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 return -EBUSY;
431 }
Clemens Ladischf87135f2005-11-20 14:06:59 +0100432 list_add_tail(&hwdep->list, &snd_hwdep_devices);
Takashi Iwai40a4b262015-01-30 08:34:58 +0100433 err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP,
434 hwdep->card, hwdep->device,
435 &snd_hwdep_f_ops, hwdep, &hwdep->dev);
Takashi Iwai71e2e1c2014-02-25 08:05:21 +0100436 if (err < 0) {
Takashi Iwai7b461602015-01-29 17:13:32 +0100437 dev_err(&hwdep->dev, "unable to register\n");
Clemens Ladischf87135f2005-11-20 14:06:59 +0100438 list_del(&hwdep->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100439 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 return err;
441 }
Takashi Iwaicaa751b2014-02-25 08:30:50 +0100442
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443#ifdef CONFIG_SND_OSSEMUL
444 hwdep->ossreg = 0;
445 if (hwdep->oss_type >= 0) {
Takashi Iwai7b461602015-01-29 17:13:32 +0100446 if (hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM &&
447 hwdep->device)
448 dev_warn(&hwdep->dev,
Takashi Iwai2ebef692014-02-04 18:21:54 +0100449 "only hwdep device 0 can be registered as OSS direct FM device!\n");
Takashi Iwai7b461602015-01-29 17:13:32 +0100450 else if (snd_register_oss_device(hwdep->oss_type,
451 card, hwdep->device,
452 &snd_hwdep_f_ops, hwdep) < 0)
453 dev_warn(&hwdep->dev,
454 "unable to register OSS compatibility device\n");
455 else
456 hwdep->ossreg = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 }
458#endif
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100459 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 return 0;
461}
462
Takashi Iwaic4614822006-06-23 14:38:23 +0200463static int snd_hwdep_dev_disconnect(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100465 struct snd_hwdep *hwdep = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200467 if (snd_BUG_ON(!hwdep))
468 return -ENXIO;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100469 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100470 if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100471 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 return -EINVAL;
473 }
Takashi Iwai0914f792012-10-16 16:43:39 +0200474 mutex_lock(&hwdep->open_mutex);
475 wake_up(&hwdep->open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476#ifdef CONFIG_SND_OSSEMUL
477 if (hwdep->ossreg)
478 snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device);
479#endif
Takashi Iwai40a4b262015-01-30 08:34:58 +0100480 snd_unregister_device(&hwdep->dev);
Takashi Iwaic4614822006-06-23 14:38:23 +0200481 list_del_init(&hwdep->list);
Takashi Iwai0914f792012-10-16 16:43:39 +0200482 mutex_unlock(&hwdep->open_mutex);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100483 mutex_unlock(&register_mutex);
Takashi Iwaic4614822006-06-23 14:38:23 +0200484 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485}
486
Jie Yangcd6a6502015-05-27 19:45:45 +0800487#ifdef CONFIG_SND_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488/*
489 * Info interface
490 */
491
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100492static void snd_hwdep_proc_read(struct snd_info_entry *entry,
493 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100495 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100497 mutex_lock(&register_mutex);
Johannes Berg9244b2c2006-10-05 16:02:22 +0200498 list_for_each_entry(hwdep, &snd_hwdep_devices, list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 snd_iprintf(buffer, "%02i-%02i: %s\n",
Clemens Ladischf87135f2005-11-20 14:06:59 +0100500 hwdep->card->number, hwdep->device, hwdep->name);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100501 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502}
503
Takashi Iwaie28563c2005-12-01 10:42:42 +0100504static struct snd_info_entry *snd_hwdep_proc_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505
Takashi Iwaie28563c2005-12-01 10:42:42 +0100506static void __init snd_hwdep_proc_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100508 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 entry->c.text.read = snd_hwdep_proc_read;
512 if (snd_info_register(entry) < 0) {
513 snd_info_free_entry(entry);
514 entry = NULL;
515 }
516 }
517 snd_hwdep_proc_entry = entry;
Takashi Iwaie28563c2005-12-01 10:42:42 +0100518}
519
520static void __exit snd_hwdep_proc_done(void)
521{
Takashi Iwai746d4a02006-06-23 14:37:59 +0200522 snd_info_free_entry(snd_hwdep_proc_entry);
Takashi Iwaie28563c2005-12-01 10:42:42 +0100523}
Jie Yangcd6a6502015-05-27 19:45:45 +0800524#else /* !CONFIG_SND_PROC_FS */
Takashi Iwaie28563c2005-12-01 10:42:42 +0100525#define snd_hwdep_proc_init()
526#define snd_hwdep_proc_done()
Jie Yangcd6a6502015-05-27 19:45:45 +0800527#endif /* CONFIG_SND_PROC_FS */
Takashi Iwaie28563c2005-12-01 10:42:42 +0100528
529
530/*
531 * ENTRY functions
532 */
533
534static int __init alsa_hwdep_init(void)
535{
536 snd_hwdep_proc_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 snd_ctl_register_ioctl(snd_hwdep_control_ioctl);
538 snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl);
539 return 0;
540}
541
542static void __exit alsa_hwdep_exit(void)
543{
544 snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl);
545 snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl);
Takashi Iwaie28563c2005-12-01 10:42:42 +0100546 snd_hwdep_proc_done();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547}
548
549module_init(alsa_hwdep_init)
550module_exit(alsa_hwdep_exit)