blob: d105073298cb536148214fd04edb318220825e13 [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
Takashi Iwaia0830db2012-10-16 13:05:59 +0200103 if (!try_module_get(hw->card->module)) {
104 snd_card_unref(hw->card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 return -EFAULT;
Takashi Iwaia0830db2012-10-16 13:05:59 +0200106 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
108 init_waitqueue_entry(&wait, current);
109 add_wait_queue(&hw->open_wait, &wait);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100110 mutex_lock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 while (1) {
112 if (hw->exclusive && hw->used > 0) {
113 err = -EBUSY;
114 break;
115 }
Takashi Iwai345d0b12009-02-05 09:10:20 +0100116 if (!hw->ops.open) {
117 err = 0;
118 break;
119 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 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);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100131 mutex_unlock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 schedule();
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100133 mutex_lock(&hw->open_mutex);
Takashi Iwai0914f792012-10-16 16:43:39 +0200134 if (hw->card->shutdown) {
135 err = -ENODEV;
136 break;
137 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 if (signal_pending(current)) {
139 err = -ERESTARTSYS;
140 break;
141 }
142 }
143 remove_wait_queue(&hw->open_wait, &wait);
144 if (err >= 0) {
145 err = snd_card_file_add(hw->card, file);
146 if (err >= 0) {
147 file->private_data = hw;
148 hw->used++;
149 } else {
150 if (hw->ops.release)
151 hw->ops.release(hw, file);
152 }
153 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100154 mutex_unlock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 if (err < 0)
156 module_put(hw->card->module);
Takashi Iwaia0830db2012-10-16 13:05:59 +0200157 snd_card_unref(hw->card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 return err;
159}
160
161static int snd_hwdep_release(struct inode *inode, struct file * file)
162{
Takashi Iwai345d0b12009-02-05 09:10:20 +0100163 int err = 0;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100164 struct snd_hwdep *hw = file->private_data;
Florin Malita104326f2006-09-29 12:55:25 +0200165 struct module *mod = hw->card->module;
Karsten Wiese8fa58af2007-01-31 10:05:30 +0100166
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100167 mutex_lock(&hw->open_mutex);
Karsten Wiese8fa58af2007-01-31 10:05:30 +0100168 if (hw->ops.release)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 err = hw->ops.release(hw, file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 if (hw->used > 0)
171 hw->used--;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100172 mutex_unlock(&hw->open_mutex);
Karsten Wiese8fa58af2007-01-31 10:05:30 +0100173 wake_up(&hw->open_wait);
174
175 snd_card_file_remove(hw->card, file);
Florin Malita104326f2006-09-29 12:55:25 +0200176 module_put(mod);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 return err;
178}
179
180static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait)
181{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100182 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 if (hw->ops.poll)
184 return hw->ops.poll(hw, file, wait);
185 return 0;
186}
187
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100188static int snd_hwdep_info(struct snd_hwdep *hw,
189 struct snd_hwdep_info __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100191 struct snd_hwdep_info info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
193 memset(&info, 0, sizeof(info));
194 info.card = hw->card->number;
195 strlcpy(info.id, hw->id, sizeof(info.id));
196 strlcpy(info.name, hw->name, sizeof(info.name));
197 info.iface = hw->iface;
198 if (copy_to_user(_info, &info, sizeof(info)))
199 return -EFAULT;
200 return 0;
201}
202
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100203static int snd_hwdep_dsp_status(struct snd_hwdep *hw,
204 struct snd_hwdep_dsp_status __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100206 struct snd_hwdep_dsp_status info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 int err;
208
209 if (! hw->ops.dsp_status)
210 return -ENXIO;
211 memset(&info, 0, sizeof(info));
212 info.dsp_loaded = hw->dsp_loaded;
213 if ((err = hw->ops.dsp_status(hw, &info)) < 0)
214 return err;
215 if (copy_to_user(_info, &info, sizeof(info)))
216 return -EFAULT;
217 return 0;
218}
219
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100220static int snd_hwdep_dsp_load(struct snd_hwdep *hw,
221 struct snd_hwdep_dsp_image __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100223 struct snd_hwdep_dsp_image info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 int err;
225
226 if (! hw->ops.dsp_load)
227 return -ENXIO;
228 memset(&info, 0, sizeof(info));
229 if (copy_from_user(&info, _info, sizeof(info)))
230 return -EFAULT;
231 /* check whether the dsp was already loaded */
232 if (hw->dsp_loaded & (1 << info.index))
233 return -EBUSY;
234 if (!access_ok(VERIFY_READ, info.image, info.length))
235 return -EFAULT;
236 err = hw->ops.dsp_load(hw, &info);
237 if (err < 0)
238 return err;
239 hw->dsp_loaded |= (1 << info.index);
240 return 0;
241}
242
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100243static long snd_hwdep_ioctl(struct file * file, unsigned int cmd,
244 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100246 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 void __user *argp = (void __user *)arg;
248 switch (cmd) {
249 case SNDRV_HWDEP_IOCTL_PVERSION:
250 return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp);
251 case SNDRV_HWDEP_IOCTL_INFO:
252 return snd_hwdep_info(hw, argp);
253 case SNDRV_HWDEP_IOCTL_DSP_STATUS:
254 return snd_hwdep_dsp_status(hw, argp);
255 case SNDRV_HWDEP_IOCTL_DSP_LOAD:
256 return snd_hwdep_dsp_load(hw, argp);
257 }
258 if (hw->ops.ioctl)
259 return hw->ops.ioctl(hw, file, cmd, arg);
260 return -ENOTTY;
261}
262
263static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma)
264{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100265 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 if (hw->ops.mmap)
267 return hw->ops.mmap(hw, file, vma);
268 return -ENXIO;
269}
270
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100271static int snd_hwdep_control_ioctl(struct snd_card *card,
272 struct snd_ctl_file * control,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 unsigned int cmd, unsigned long arg)
274{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 switch (cmd) {
276 case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE:
277 {
278 int device;
279
280 if (get_user(device, (int __user *)arg))
281 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100282 mutex_lock(&register_mutex);
Dan Carpenterf7b2bb82011-10-28 09:46:01 +0300283
284 if (device < 0)
285 device = 0;
286 else if (device < SNDRV_MINOR_HWDEPS)
287 device++;
288 else
289 device = SNDRV_MINOR_HWDEPS;
290
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 while (device < SNDRV_MINOR_HWDEPS) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100292 if (snd_hwdep_search(card, device))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 break;
294 device++;
295 }
296 if (device >= SNDRV_MINOR_HWDEPS)
297 device = -1;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100298 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 if (put_user(device, (int __user *)arg))
300 return -EFAULT;
301 return 0;
302 }
303 case SNDRV_CTL_IOCTL_HWDEP_INFO:
304 {
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100305 struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100306 int device, err;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100307 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
309 if (get_user(device, &info->device))
310 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100311 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100312 hwdep = snd_hwdep_search(card, device);
313 if (hwdep)
314 err = snd_hwdep_info(hwdep, info);
315 else
316 err = -ENXIO;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100317 mutex_unlock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100318 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 }
320 }
321 return -ENOIOCTLCMD;
322}
323
324#ifdef CONFIG_COMPAT
325#include "hwdep_compat.c"
326#else
327#define snd_hwdep_ioctl_compat NULL
328#endif
329
330/*
331
332 */
333
Arjan van de Ven9c2e08c2007-02-12 00:55:37 -0800334static const struct file_operations snd_hwdep_f_ops =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335{
336 .owner = THIS_MODULE,
337 .llseek = snd_hwdep_llseek,
338 .read = snd_hwdep_read,
339 .write = snd_hwdep_write,
340 .open = snd_hwdep_open,
341 .release = snd_hwdep_release,
342 .poll = snd_hwdep_poll,
343 .unlocked_ioctl = snd_hwdep_ioctl,
344 .compat_ioctl = snd_hwdep_ioctl_compat,
345 .mmap = snd_hwdep_mmap,
346};
347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348/**
349 * snd_hwdep_new - create a new hwdep instance
350 * @card: the card instance
351 * @id: the id string
352 * @device: the device index (zero-based)
353 * @rhwdep: the pointer to store the new hwdep instance
354 *
355 * Creates a new hwdep instance with the given index on the card.
356 * The callbacks (hwdep->ops) must be set on the returned instance
357 * after this call manually by the caller.
358 *
Yacine Belkadieb7c06e2013-03-11 22:05:14 +0100359 * Return: Zero if successful, or a negative error code on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 */
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100361int snd_hwdep_new(struct snd_card *card, char *id, int device,
362 struct snd_hwdep **rhwdep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100364 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 int err;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100366 static struct snd_device_ops ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 .dev_free = snd_hwdep_dev_free,
368 .dev_register = snd_hwdep_dev_register,
Takashi Iwaic4614822006-06-23 14:38:23 +0200369 .dev_disconnect = snd_hwdep_dev_disconnect,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 };
371
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200372 if (snd_BUG_ON(!card))
373 return -ENXIO;
374 if (rhwdep)
375 *rhwdep = NULL;
Takashi Iwaica2c0962005-09-09 14:20:23 +0200376 hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL);
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100377 if (hwdep == NULL) {
378 snd_printk(KERN_ERR "hwdep: cannot allocate\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 return -ENOMEM;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100380 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 hwdep->card = card;
382 hwdep->device = device;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100383 if (id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 strlcpy(hwdep->id, id, sizeof(hwdep->id));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385#ifdef CONFIG_SND_OSSEMUL
386 hwdep->oss_type = -1;
387#endif
388 if ((err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops)) < 0) {
389 snd_hwdep_free(hwdep);
390 return err;
391 }
392 init_waitqueue_head(&hwdep->open_wait);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100393 mutex_init(&hwdep->open_mutex);
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200394 if (rhwdep)
395 *rhwdep = hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 return 0;
397}
398
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100399static int snd_hwdep_free(struct snd_hwdep *hwdep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400{
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200401 if (!hwdep)
402 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 if (hwdep->private_free)
404 hwdep->private_free(hwdep);
405 kfree(hwdep);
406 return 0;
407}
408
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100409static int snd_hwdep_dev_free(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100411 struct snd_hwdep *hwdep = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 return snd_hwdep_free(hwdep);
413}
414
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100415static int snd_hwdep_dev_register(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100417 struct snd_hwdep *hwdep = device->device_data;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100418 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 char name[32];
420
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100421 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100422 if (snd_hwdep_search(hwdep->card, hwdep->device)) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100423 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 return -EBUSY;
425 }
Clemens Ladischf87135f2005-11-20 14:06:59 +0100426 list_add_tail(&hwdep->list, &snd_hwdep_devices);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device);
428 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP,
429 hwdep->card, hwdep->device,
Clemens Ladischf87135f2005-11-20 14:06:59 +0100430 &snd_hwdep_f_ops, hwdep, name)) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n",
432 hwdep->card->number, hwdep->device);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100433 list_del(&hwdep->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100434 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 return err;
436 }
437#ifdef CONFIG_SND_OSSEMUL
438 hwdep->ossreg = 0;
439 if (hwdep->oss_type >= 0) {
440 if ((hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM) && (hwdep->device != 0)) {
441 snd_printk (KERN_WARNING "only hwdep device 0 can be registered as OSS direct FM device!\n");
442 } else {
443 if (snd_register_oss_device(hwdep->oss_type,
444 hwdep->card, hwdep->device,
Clemens Ladischf87135f2005-11-20 14:06:59 +0100445 &snd_hwdep_f_ops, hwdep,
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100446 hwdep->oss_dev) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 snd_printk(KERN_ERR "unable to register OSS compatibility device %i:%i\n",
448 hwdep->card->number, hwdep->device);
449 } else
450 hwdep->ossreg = 1;
451 }
452 }
453#endif
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100454 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 return 0;
456}
457
Takashi Iwaic4614822006-06-23 14:38:23 +0200458static int snd_hwdep_dev_disconnect(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100460 struct snd_hwdep *hwdep = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200462 if (snd_BUG_ON(!hwdep))
463 return -ENXIO;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100464 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100465 if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100466 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 return -EINVAL;
468 }
Takashi Iwai0914f792012-10-16 16:43:39 +0200469 mutex_lock(&hwdep->open_mutex);
470 wake_up(&hwdep->open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471#ifdef CONFIG_SND_OSSEMUL
472 if (hwdep->ossreg)
473 snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device);
474#endif
475 snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device);
Takashi Iwaic4614822006-06-23 14:38:23 +0200476 list_del_init(&hwdep->list);
Takashi Iwai0914f792012-10-16 16:43:39 +0200477 mutex_unlock(&hwdep->open_mutex);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100478 mutex_unlock(&register_mutex);
Takashi Iwaic4614822006-06-23 14:38:23 +0200479 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480}
481
Takashi Iwaie28563c2005-12-01 10:42:42 +0100482#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483/*
484 * Info interface
485 */
486
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100487static void snd_hwdep_proc_read(struct snd_info_entry *entry,
488 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100490 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100492 mutex_lock(&register_mutex);
Johannes Berg9244b2c2006-10-05 16:02:22 +0200493 list_for_each_entry(hwdep, &snd_hwdep_devices, list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 snd_iprintf(buffer, "%02i-%02i: %s\n",
Clemens Ladischf87135f2005-11-20 14:06:59 +0100495 hwdep->card->number, hwdep->device, hwdep->name);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100496 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497}
498
Takashi Iwaie28563c2005-12-01 10:42:42 +0100499static struct snd_info_entry *snd_hwdep_proc_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
Takashi Iwaie28563c2005-12-01 10:42:42 +0100501static void __init snd_hwdep_proc_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100503 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 entry->c.text.read = snd_hwdep_proc_read;
507 if (snd_info_register(entry) < 0) {
508 snd_info_free_entry(entry);
509 entry = NULL;
510 }
511 }
512 snd_hwdep_proc_entry = entry;
Takashi Iwaie28563c2005-12-01 10:42:42 +0100513}
514
515static void __exit snd_hwdep_proc_done(void)
516{
Takashi Iwai746d4a02006-06-23 14:37:59 +0200517 snd_info_free_entry(snd_hwdep_proc_entry);
Takashi Iwaie28563c2005-12-01 10:42:42 +0100518}
519#else /* !CONFIG_PROC_FS */
520#define snd_hwdep_proc_init()
521#define snd_hwdep_proc_done()
522#endif /* CONFIG_PROC_FS */
523
524
525/*
526 * ENTRY functions
527 */
528
529static int __init alsa_hwdep_init(void)
530{
531 snd_hwdep_proc_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 snd_ctl_register_ioctl(snd_hwdep_control_ioctl);
533 snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl);
534 return 0;
535}
536
537static void __exit alsa_hwdep_exit(void)
538{
539 snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl);
540 snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl);
Takashi Iwaie28563c2005-12-01 10:42:42 +0100541 snd_hwdep_proc_done();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542}
543
544module_init(alsa_hwdep_init)
545module_exit(alsa_hwdep_exit)
546
547EXPORT_SYMBOL(snd_hwdep_new);