[ALSA] Remove xxx_t typedefs: Sequencer OSS-emulation
[linux-2.6.git] / sound / core / seq / oss / seq_oss.c
1 /*
2  * OSS compatible sequencer driver
3  *
4  * registration of device and proc
5  *
6  * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
7  *
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.
12  *
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.
17  *
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
21  */
22
23 #include <sound/driver.h>
24 #include <linux/init.h>
25 #include <linux/smp_lock.h>
26 #include <linux/moduleparam.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"
32
33 /*
34  * module option
35  */
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);
42
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;
47 #endif
48
49
50 /*
51  * prototypes
52  */
53 static int register_device(void);
54 static void unregister_device(void);
55 static int register_proc(void);
56 static void unregister_proc(void);
57
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 long odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
63 static unsigned int odev_poll(struct file *file, poll_table * wait);
64 #ifdef CONFIG_PROC_FS
65 static void info_read(struct snd_info_entry *entry, struct snd_info_buffer *buf);
66 #endif
67
68
69 /*
70  * module interface
71  */
72
73 static int __init alsa_seq_oss_init(void)
74 {
75         int rc;
76         static struct snd_seq_dev_ops ops = {
77                 snd_seq_oss_synth_register,
78                 snd_seq_oss_synth_unregister,
79         };
80
81         snd_seq_autoload_lock();
82         if ((rc = register_device()) < 0)
83                 goto error;
84         if ((rc = register_proc()) < 0) {
85                 unregister_device();
86                 goto error;
87         }
88         if ((rc = snd_seq_oss_create_client()) < 0) {
89                 unregister_proc();
90                 unregister_device();
91                 goto error;
92         }
93
94         if ((rc = snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OSS, &ops,
95                                                  sizeof(struct snd_seq_oss_reg))) < 0) {
96                 snd_seq_oss_delete_client();
97                 unregister_proc();
98                 unregister_device();
99                 goto error;
100         }
101
102         /* success */
103         snd_seq_oss_synth_init();
104
105  error:
106         snd_seq_autoload_unlock();
107         return rc;
108 }
109
110 static void __exit alsa_seq_oss_exit(void)
111 {
112         snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OSS);
113         snd_seq_oss_delete_client();
114         unregister_proc();
115         unregister_device();
116 }
117
118 module_init(alsa_seq_oss_init)
119 module_exit(alsa_seq_oss_exit)
120
121 /*
122  * ALSA minor device interface
123  */
124
125 static DECLARE_MUTEX(register_mutex);
126
127 static int
128 odev_open(struct inode *inode, struct file *file)
129 {
130         int level, rc;
131
132         if (iminor(inode) == SNDRV_MINOR_OSS_MUSIC)
133                 level = SNDRV_SEQ_OSS_MODE_MUSIC;
134         else
135                 level = SNDRV_SEQ_OSS_MODE_SYNTH;
136
137         down(&register_mutex);
138         rc = snd_seq_oss_open(file, level);
139         up(&register_mutex);
140
141         return rc;
142 }
143
144 static int
145 odev_release(struct inode *inode, struct file *file)
146 {
147         struct seq_oss_devinfo *dp;
148
149         if ((dp = file->private_data) == NULL)
150                 return 0;
151
152         snd_seq_oss_drain_write(dp);
153
154         down(&register_mutex);
155         snd_seq_oss_release(dp);
156         up(&register_mutex);
157
158         return 0;
159 }
160
161 static ssize_t
162 odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
163 {
164         struct seq_oss_devinfo *dp;
165         dp = file->private_data;
166         snd_assert(dp != NULL, return -EIO);
167         return snd_seq_oss_read(dp, buf, count);
168 }
169
170
171 static ssize_t
172 odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
173 {
174         struct seq_oss_devinfo *dp;
175         dp = file->private_data;
176         snd_assert(dp != NULL, return -EIO);
177         return snd_seq_oss_write(dp, buf, count, file);
178 }
179
180 static long
181 odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
182 {
183         struct seq_oss_devinfo *dp;
184         dp = file->private_data;
185         snd_assert(dp != NULL, return -EIO);
186         return snd_seq_oss_ioctl(dp, cmd, arg);
187 }
188
189 #ifdef CONFIG_COMPAT
190 #define odev_ioctl_compat       odev_ioctl
191 #else
192 #define odev_ioctl_compat       NULL
193 #endif
194
195 static unsigned int
196 odev_poll(struct file *file, poll_table * wait)
197 {
198         struct seq_oss_devinfo *dp;
199         dp = file->private_data;
200         snd_assert(dp != NULL, return 0);
201         return snd_seq_oss_poll(dp, file, wait);
202 }
203
204 /*
205  * registration of sequencer minor device
206  */
207
208 static struct file_operations seq_oss_f_ops =
209 {
210         .owner =        THIS_MODULE,
211         .read =         odev_read,
212         .write =        odev_write,
213         .open =         odev_open,
214         .release =      odev_release,
215         .poll =         odev_poll,
216         .unlocked_ioctl =       odev_ioctl,
217         .compat_ioctl = odev_ioctl_compat,
218 };
219
220 static struct snd_minor seq_oss_reg = {
221         .comment =      "sequencer",
222         .f_ops =        &seq_oss_f_ops,
223 };
224
225 static int __init
226 register_device(void)
227 {
228         int rc;
229
230         down(&register_mutex);
231         if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
232                                           NULL, 0,
233                                           &seq_oss_reg,
234                                           SNDRV_SEQ_OSS_DEVNAME)) < 0) {
235                 snd_printk(KERN_ERR "can't register device seq\n");
236                 up(&register_mutex);
237                 return rc;
238         }
239         if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC,
240                                           NULL, 0,
241                                           &seq_oss_reg,
242                                           SNDRV_SEQ_OSS_DEVNAME)) < 0) {
243                 snd_printk(KERN_ERR "can't register device music\n");
244                 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
245                 up(&register_mutex);
246                 return rc;
247         }
248         debug_printk(("device registered\n"));
249         up(&register_mutex);
250         return 0;
251 }
252
253 static void
254 unregister_device(void)
255 {
256         down(&register_mutex);
257         debug_printk(("device unregistered\n"));
258         if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC, NULL, 0) < 0)                
259                 snd_printk(KERN_ERR "error unregister device music\n");
260         if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
261                 snd_printk(KERN_ERR "error unregister device seq\n");
262         up(&register_mutex);
263 }
264
265 /*
266  * /proc interface
267  */
268
269 #ifdef CONFIG_PROC_FS
270
271 static struct snd_info_entry *info_entry;
272
273 static void
274 info_read(struct snd_info_entry *entry, struct snd_info_buffer *buf)
275 {
276         down(&register_mutex);
277         snd_iprintf(buf, "OSS sequencer emulation version %s\n", SNDRV_SEQ_OSS_VERSION_STR);
278         snd_seq_oss_system_info_read(buf);
279         snd_seq_oss_synth_info_read(buf);
280         snd_seq_oss_midi_info_read(buf);
281         up(&register_mutex);
282 }
283
284 #endif /* CONFIG_PROC_FS */
285
286 static int __init
287 register_proc(void)
288 {
289 #ifdef CONFIG_PROC_FS
290         struct snd_info_entry *entry;
291
292         entry = snd_info_create_module_entry(THIS_MODULE, SNDRV_SEQ_OSS_PROCNAME, snd_seq_root);
293         if (entry == NULL)
294                 return -ENOMEM;
295
296         entry->content = SNDRV_INFO_CONTENT_TEXT;
297         entry->private_data = NULL;
298         entry->c.text.read_size = 1024;
299         entry->c.text.read = info_read;
300         if (snd_info_register(entry) < 0) {
301                 snd_info_free_entry(entry);
302                 return -ENOMEM;
303         }
304         info_entry = entry;
305 #endif
306         return 0;
307 }
308
309 static void
310 unregister_proc(void)
311 {
312 #ifdef CONFIG_PROC_FS
313         if (info_entry)
314                 snd_info_unregister(info_entry);
315         info_entry = NULL;
316 #endif
317 }