2
* OSS compatible sequencer driver
4
* registration of device and proc
6
* Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
8
* This program is free software; you can redistribute it and/or modify
9
* it under the terms of the GNU General Public License as published by
10
* the Free Software Foundation; either version 2 of the License, or
11
* (at your option) any later version.
13
* This program is distributed in the hope that it will be useful,
14
* but WITHOUT ANY WARRANTY; without even the implied warranty of
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16
* GNU General Public License for more details.
18
* You should have received a copy of the GNU General Public License
19
* along with this program; if not, write to the Free Software
20
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23
#include <linux/init.h>
24
#include <linux/module.h>
25
#include <linux/mutex.h>
26
#include <sound/core.h>
27
#include <sound/minors.h>
28
#include <sound/initval.h>
29
#include "seq_oss_device.h"
30
#include "seq_oss_synth.h"
35
MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
36
MODULE_DESCRIPTION("OSS-compatible sequencer module");
37
MODULE_LICENSE("GPL");
38
/* Takashi says this is really only for sound-service-0-, but this is OK. */
39
MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_SEQUENCER);
40
MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MUSIC);
42
#ifdef SNDRV_SEQ_OSS_DEBUG
43
module_param(seq_oss_debug, int, 0644);
44
MODULE_PARM_DESC(seq_oss_debug, "debug option");
45
int seq_oss_debug = 0;
52
static int register_device(void);
53
static void unregister_device(void);
55
static int register_proc(void);
56
static void unregister_proc(void);
58
static inline int register_proc(void) { return 0; }
59
static inline void unregister_proc(void) {}
62
static int odev_open(struct inode *inode, struct file *file);
63
static int odev_release(struct inode *inode, struct file *file);
64
static ssize_t odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset);
65
static ssize_t odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset);
66
static long odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
67
static unsigned int odev_poll(struct file *file, poll_table * wait);
74
static int __init alsa_seq_oss_init(void)
77
static struct snd_seq_dev_ops ops = {
78
snd_seq_oss_synth_register,
79
snd_seq_oss_synth_unregister,
82
snd_seq_autoload_lock();
83
if ((rc = register_device()) < 0)
85
if ((rc = register_proc()) < 0) {
89
if ((rc = snd_seq_oss_create_client()) < 0) {
95
if ((rc = snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OSS, &ops,
96
sizeof(struct snd_seq_oss_reg))) < 0) {
97
snd_seq_oss_delete_client();
104
snd_seq_oss_synth_init();
107
snd_seq_autoload_unlock();
111
static void __exit alsa_seq_oss_exit(void)
113
snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OSS);
114
snd_seq_oss_delete_client();
119
module_init(alsa_seq_oss_init)
120
module_exit(alsa_seq_oss_exit)
123
* ALSA minor device interface
126
static DEFINE_MUTEX(register_mutex);
129
odev_open(struct inode *inode, struct file *file)
133
if (iminor(inode) == SNDRV_MINOR_OSS_MUSIC)
134
level = SNDRV_SEQ_OSS_MODE_MUSIC;
136
level = SNDRV_SEQ_OSS_MODE_SYNTH;
138
mutex_lock(®ister_mutex);
139
rc = snd_seq_oss_open(file, level);
140
mutex_unlock(®ister_mutex);
146
odev_release(struct inode *inode, struct file *file)
148
struct seq_oss_devinfo *dp;
150
if ((dp = file->private_data) == NULL)
153
snd_seq_oss_drain_write(dp);
155
mutex_lock(®ister_mutex);
156
snd_seq_oss_release(dp);
157
mutex_unlock(®ister_mutex);
163
odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
165
struct seq_oss_devinfo *dp;
166
dp = file->private_data;
169
return snd_seq_oss_read(dp, buf, count);
174
odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
176
struct seq_oss_devinfo *dp;
177
dp = file->private_data;
180
return snd_seq_oss_write(dp, buf, count, file);
184
odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
186
struct seq_oss_devinfo *dp;
187
dp = file->private_data;
190
return snd_seq_oss_ioctl(dp, cmd, arg);
194
#define odev_ioctl_compat odev_ioctl
196
#define odev_ioctl_compat NULL
200
odev_poll(struct file *file, poll_table * wait)
202
struct seq_oss_devinfo *dp;
203
dp = file->private_data;
206
return snd_seq_oss_poll(dp, file, wait);
210
* registration of sequencer minor device
213
static const struct file_operations seq_oss_f_ops =
215
.owner = THIS_MODULE,
219
.release = odev_release,
221
.unlocked_ioctl = odev_ioctl,
222
.compat_ioctl = odev_ioctl_compat,
223
.llseek = noop_llseek,
227
register_device(void)
231
mutex_lock(®ister_mutex);
232
if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
234
&seq_oss_f_ops, NULL,
235
SNDRV_SEQ_OSS_DEVNAME)) < 0) {
236
snd_printk(KERN_ERR "can't register device seq\n");
237
mutex_unlock(®ister_mutex);
240
if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC,
242
&seq_oss_f_ops, NULL,
243
SNDRV_SEQ_OSS_DEVNAME)) < 0) {
244
snd_printk(KERN_ERR "can't register device music\n");
245
snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
246
mutex_unlock(®ister_mutex);
249
debug_printk(("device registered\n"));
250
mutex_unlock(®ister_mutex);
255
unregister_device(void)
257
mutex_lock(®ister_mutex);
258
debug_printk(("device unregistered\n"));
259
if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC, NULL, 0) < 0)
260
snd_printk(KERN_ERR "error unregister device music\n");
261
if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
262
snd_printk(KERN_ERR "error unregister device seq\n");
263
mutex_unlock(®ister_mutex);
270
#ifdef CONFIG_PROC_FS
272
static struct snd_info_entry *info_entry;
275
info_read(struct snd_info_entry *entry, struct snd_info_buffer *buf)
277
mutex_lock(®ister_mutex);
278
snd_iprintf(buf, "OSS sequencer emulation version %s\n", SNDRV_SEQ_OSS_VERSION_STR);
279
snd_seq_oss_system_info_read(buf);
280
snd_seq_oss_synth_info_read(buf);
281
snd_seq_oss_midi_info_read(buf);
282
mutex_unlock(®ister_mutex);
289
struct snd_info_entry *entry;
291
entry = snd_info_create_module_entry(THIS_MODULE, SNDRV_SEQ_OSS_PROCNAME, snd_seq_root);
295
entry->content = SNDRV_INFO_CONTENT_TEXT;
296
entry->private_data = NULL;
297
entry->c.text.read = info_read;
298
if (snd_info_register(entry) < 0) {
299
snd_info_free_entry(entry);
307
unregister_proc(void)
309
snd_info_free_entry(info_entry);
312
#endif /* CONFIG_PROC_FS */