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 <sound/driver.h>
24 #include <linux/init.h>
25 #include <linux/moduleparam.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 MODULE_CLASSES("{sound}");
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);
43 #ifdef SNDRV_SEQ_OSS_DEBUG
44 module_param(seq_oss_debug, int, 0644);
45 MODULE_PARM_DESC(seq_oss_debug, "debug option");
46 int seq_oss_debug = 0;
53 static int register_device(void);
54 static void unregister_device(void);
55 static int register_proc(void);
56 static void unregister_proc(void);
58 static int odev_open(struct inode *inode, struct file *file);
59 static int odev_release(struct inode *inode, struct file *file);
60 static ssize_t odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset);
61 static ssize_t odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset);
62 static int odev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
63 static unsigned int odev_poll(struct file *file, poll_table * wait);
65 static void info_read(snd_info_entry_t *entry, snd_info_buffer_t *buf);
73 static int __init alsa_seq_oss_init(void)
76 static snd_seq_dev_ops_t ops = {
77 snd_seq_oss_synth_register,
78 snd_seq_oss_synth_unregister,
81 if ((rc = register_device()) < 0)
83 if ((rc = register_proc()) < 0) {
87 if ((rc = snd_seq_oss_create_client()) < 0) {
93 if ((rc = snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OSS, &ops,
94 sizeof(snd_seq_oss_reg_t))) < 0) {
95 snd_seq_oss_delete_client();
102 snd_seq_oss_synth_init();
106 static void __exit alsa_seq_oss_exit(void)
108 snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OSS);
109 snd_seq_oss_delete_client();
114 module_init(alsa_seq_oss_init)
115 module_exit(alsa_seq_oss_exit)
118 * ALSA minor device interface
121 static DECLARE_MUTEX(register_mutex);
124 odev_open(struct inode *inode, struct file *file)
128 if (iminor(inode) == SNDRV_MINOR_OSS_MUSIC)
129 level = SNDRV_SEQ_OSS_MODE_MUSIC;
131 level = SNDRV_SEQ_OSS_MODE_SYNTH;
133 down(®ister_mutex);
134 rc = snd_seq_oss_open(file, level);
141 odev_release(struct inode *inode, struct file *file)
143 seq_oss_devinfo_t *dp;
145 if ((dp = file->private_data) == NULL)
148 snd_seq_oss_drain_write(dp);
150 down(®ister_mutex);
151 snd_seq_oss_release(dp);
158 odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
160 seq_oss_devinfo_t *dp;
161 dp = file->private_data;
162 snd_assert(dp != NULL, return -EIO);
163 return snd_seq_oss_read(dp, buf, count);
168 odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
170 seq_oss_devinfo_t *dp;
171 dp = file->private_data;
172 snd_assert(dp != NULL, return -EIO);
173 return snd_seq_oss_write(dp, buf, count, file);
177 odev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
179 seq_oss_devinfo_t *dp;
180 dp = file->private_data;
181 snd_assert(dp != NULL, return -EIO);
182 return snd_seq_oss_ioctl(dp, cmd, arg);
187 odev_poll(struct file *file, poll_table * wait)
189 seq_oss_devinfo_t *dp;
190 dp = file->private_data;
191 snd_assert(dp != NULL, return 0);
192 return snd_seq_oss_poll(dp, file, wait);
196 * registration of sequencer minor device
199 static struct file_operations seq_oss_f_ops =
201 .owner = THIS_MODULE,
205 .release = odev_release,
210 static snd_minor_t seq_oss_reg = {
211 .comment = "sequencer",
212 .f_ops = &seq_oss_f_ops,
216 register_device(void)
220 down(®ister_mutex);
221 if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
224 SNDRV_SEQ_OSS_DEVNAME)) < 0) {
225 snd_printk(KERN_ERR "can't register device seq\n");
229 if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC,
232 SNDRV_SEQ_OSS_DEVNAME)) < 0) {
233 snd_printk(KERN_ERR "can't register device music\n");
234 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
238 debug_printk(("device registered\n"));
244 unregister_device(void)
246 down(®ister_mutex);
247 debug_printk(("device unregistered\n"));
248 if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC, NULL, 0) < 0)
249 snd_printk(KERN_ERR "error unregister device music\n");
250 if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
251 snd_printk(KERN_ERR "error unregister device seq\n");
259 #ifdef CONFIG_PROC_FS
261 static snd_info_entry_t *info_entry;
264 info_read(snd_info_entry_t *entry, snd_info_buffer_t *buf)
266 down(®ister_mutex);
267 snd_iprintf(buf, "OSS sequencer emulation version %s\n", SNDRV_SEQ_OSS_VERSION_STR);
268 snd_seq_oss_system_info_read(buf);
269 snd_seq_oss_synth_info_read(buf);
270 snd_seq_oss_midi_info_read(buf);
274 #endif /* CONFIG_PROC_FS */
279 #ifdef CONFIG_PROC_FS
280 snd_info_entry_t *entry;
282 entry = snd_info_create_module_entry(THIS_MODULE, SNDRV_SEQ_OSS_PROCNAME, snd_seq_root);
286 entry->content = SNDRV_INFO_CONTENT_TEXT;
287 entry->private_data = NULL;
288 entry->c.text.read_size = 1024;
289 entry->c.text.read = info_read;
290 if (snd_info_register(entry) < 0) {
291 snd_info_free_entry(entry);
300 unregister_proc(void)
302 #ifdef CONFIG_PROC_FS
304 snd_info_unregister(info_entry);