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 <linux/compat.h>
27 #include <sound/core.h>
28 #include <sound/minors.h>
29 #include <sound/initval.h>
30 #include "seq_oss_device.h"
31 #include "seq_oss_synth.h"
36 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
37 MODULE_DESCRIPTION("OSS-compatible sequencer module");
38 MODULE_LICENSE("GPL");
39 /* Takashi says this is really only for sound-service-0-, but this is OK. */
40 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_SEQUENCER);
41 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MUSIC);
47 static int register_device(void);
48 static void unregister_device(void);
49 #ifdef CONFIG_SND_PROC_FS
50 static int register_proc(void);
51 static void unregister_proc(void);
53 static inline int register_proc(void) { return 0; }
54 static inline void unregister_proc(void) {}
57 static int odev_open(struct inode *inode, struct file *file);
58 static int odev_release(struct inode *inode, struct file *file);
59 static ssize_t odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset);
60 static ssize_t odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset);
61 static long odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
62 static __poll_t odev_poll(struct file *file, poll_table * wait);
69 static struct snd_seq_driver seq_oss_synth_driver = {
71 .name = KBUILD_MODNAME,
72 .probe = snd_seq_oss_synth_probe,
73 .remove = snd_seq_oss_synth_remove,
75 .id = SNDRV_SEQ_DEV_ID_OSS,
76 .argsize = sizeof(struct snd_seq_oss_reg),
79 static int __init alsa_seq_oss_init(void)
83 if ((rc = register_device()) < 0)
85 if ((rc = register_proc()) < 0) {
89 if ((rc = snd_seq_oss_create_client()) < 0) {
95 rc = snd_seq_driver_register(&seq_oss_synth_driver);
97 snd_seq_oss_delete_client();
104 snd_seq_oss_synth_init();
110 static void __exit alsa_seq_oss_exit(void)
112 snd_seq_driver_unregister(&seq_oss_synth_driver);
113 snd_seq_oss_delete_client();
118 module_init(alsa_seq_oss_init)
119 module_exit(alsa_seq_oss_exit)
122 * ALSA minor device interface
125 static DEFINE_MUTEX(register_mutex);
128 odev_open(struct inode *inode, struct file *file)
132 if (iminor(inode) == SNDRV_MINOR_OSS_MUSIC)
133 level = SNDRV_SEQ_OSS_MODE_MUSIC;
135 level = SNDRV_SEQ_OSS_MODE_SYNTH;
137 mutex_lock(®ister_mutex);
138 rc = snd_seq_oss_open(file, level);
139 mutex_unlock(®ister_mutex);
145 odev_release(struct inode *inode, struct file *file)
147 struct seq_oss_devinfo *dp;
149 if ((dp = file->private_data) == NULL)
152 mutex_lock(®ister_mutex);
153 snd_seq_oss_release(dp);
154 mutex_unlock(®ister_mutex);
160 odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
162 struct seq_oss_devinfo *dp;
163 dp = file->private_data;
166 return snd_seq_oss_read(dp, buf, count);
171 odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
173 struct seq_oss_devinfo *dp;
174 dp = file->private_data;
177 return snd_seq_oss_write(dp, buf, count, file);
181 odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
183 struct seq_oss_devinfo *dp;
186 dp = file->private_data;
190 if (cmd != SNDCTL_SEQ_SYNC &&
191 mutex_lock_interruptible(®ister_mutex))
193 rc = snd_seq_oss_ioctl(dp, cmd, arg);
194 if (cmd != SNDCTL_SEQ_SYNC)
195 mutex_unlock(®ister_mutex);
200 static long odev_ioctl_compat(struct file *file, unsigned int cmd,
203 return odev_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
206 #define odev_ioctl_compat NULL
210 odev_poll(struct file *file, poll_table * wait)
212 struct seq_oss_devinfo *dp;
213 dp = file->private_data;
216 return snd_seq_oss_poll(dp, file, wait);
220 * registration of sequencer minor device
223 static const struct file_operations seq_oss_f_ops =
225 .owner = THIS_MODULE,
229 .release = odev_release,
231 .unlocked_ioctl = odev_ioctl,
232 .compat_ioctl = odev_ioctl_compat,
233 .llseek = noop_llseek,
237 register_device(void)
241 mutex_lock(®ister_mutex);
242 if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
244 &seq_oss_f_ops, NULL)) < 0) {
245 pr_err("ALSA: seq_oss: can't register device seq\n");
246 mutex_unlock(®ister_mutex);
249 if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC,
251 &seq_oss_f_ops, NULL)) < 0) {
252 pr_err("ALSA: seq_oss: can't register device music\n");
253 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
254 mutex_unlock(®ister_mutex);
257 mutex_unlock(®ister_mutex);
262 unregister_device(void)
264 mutex_lock(®ister_mutex);
265 if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC, NULL, 0) < 0)
266 pr_err("ALSA: seq_oss: error unregister device music\n");
267 if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
268 pr_err("ALSA: seq_oss: error unregister device seq\n");
269 mutex_unlock(®ister_mutex);
276 #ifdef CONFIG_SND_PROC_FS
278 static struct snd_info_entry *info_entry;
281 info_read(struct snd_info_entry *entry, struct snd_info_buffer *buf)
283 mutex_lock(®ister_mutex);
284 snd_iprintf(buf, "OSS sequencer emulation version %s\n", SNDRV_SEQ_OSS_VERSION_STR);
285 snd_seq_oss_system_info_read(buf);
286 snd_seq_oss_synth_info_read(buf);
287 snd_seq_oss_midi_info_read(buf);
288 mutex_unlock(®ister_mutex);
295 struct snd_info_entry *entry;
297 entry = snd_info_create_module_entry(THIS_MODULE, SNDRV_SEQ_OSS_PROCNAME, snd_seq_root);
301 entry->content = SNDRV_INFO_CONTENT_TEXT;
302 entry->private_data = NULL;
303 entry->c.text.read = info_read;
304 if (snd_info_register(entry) < 0) {
305 snd_info_free_entry(entry);
313 unregister_proc(void)
315 snd_info_free_entry(info_entry);
318 #endif /* CONFIG_SND_PROC_FS */