sound: fix drivers needing module.h not moduleparam.h
[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 <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"
31
32 /*
33  * module option
34  */
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);
41
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;
46 #endif
47
48
49 /*
50  * prototypes
51  */
52 static int register_device(void);
53 static void unregister_device(void);
54 #ifdef CONFIG_PROC_FS
55 static int register_proc(void);
56 static void unregister_proc(void);
57 #else
58 static inline int register_proc(void) { return 0; }
59 static inline void unregister_proc(void) {}
60 #endif
61
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);
68
69
70 /*
71  * module interface
72  */
73
74 static int __init alsa_seq_oss_init(void)
75 {
76         int rc;
77         static struct snd_seq_dev_ops ops = {
78                 snd_seq_oss_synth_register,
79                 snd_seq_oss_synth_unregister,
80         };
81
82         snd_seq_autoload_lock();
83         if ((rc = register_device()) < 0)
84                 goto error;
85         if ((rc = register_proc()) < 0) {
86                 unregister_device();
87                 goto error;
88         }
89         if ((rc = snd_seq_oss_create_client()) < 0) {
90                 unregister_proc();
91                 unregister_device();
92                 goto error;
93         }
94
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();
98                 unregister_proc();
99                 unregister_device();
100                 goto error;
101         }
102
103         /* success */
104         snd_seq_oss_synth_init();
105
106  error:
107         snd_seq_autoload_unlock();
108         return rc;
109 }
110
111 static void __exit alsa_seq_oss_exit(void)
112 {
113         snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OSS);
114         snd_seq_oss_delete_client();
115         unregister_proc();
116         unregister_device();
117 }
118
119 module_init(alsa_seq_oss_init)
120 module_exit(alsa_seq_oss_exit)
121
122 /*
123  * ALSA minor device interface
124  */
125
126 static DEFINE_MUTEX(register_mutex);
127
128 static int
129 odev_open(struct inode *inode, struct file *file)
130 {
131         int level, rc;
132
133         if (iminor(inode) == SNDRV_MINOR_OSS_MUSIC)
134                 level = SNDRV_SEQ_OSS_MODE_MUSIC;
135         else
136                 level = SNDRV_SEQ_OSS_MODE_SYNTH;
137
138         mutex_lock(&register_mutex);
139         rc = snd_seq_oss_open(file, level);
140         mutex_unlock(&register_mutex);
141
142         return rc;
143 }
144
145 static int
146 odev_release(struct inode *inode, struct file *file)
147 {
148         struct seq_oss_devinfo *dp;
149
150         if ((dp = file->private_data) == NULL)
151                 return 0;
152
153         snd_seq_oss_drain_write(dp);
154
155         mutex_lock(&register_mutex);
156         snd_seq_oss_release(dp);
157         mutex_unlock(&register_mutex);
158
159         return 0;
160 }
161
162 static ssize_t
163 odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
164 {
165         struct seq_oss_devinfo *dp;
166         dp = file->private_data;
167         if (snd_BUG_ON(!dp))
168                 return -ENXIO;
169         return snd_seq_oss_read(dp, buf, count);
170 }
171
172
173 static ssize_t
174 odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
175 {
176         struct seq_oss_devinfo *dp;
177         dp = file->private_data;
178         if (snd_BUG_ON(!dp))
179                 return -ENXIO;
180         return snd_seq_oss_write(dp, buf, count, file);
181 }
182
183 static long
184 odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
185 {
186         struct seq_oss_devinfo *dp;
187         dp = file->private_data;
188         if (snd_BUG_ON(!dp))
189                 return -ENXIO;
190         return snd_seq_oss_ioctl(dp, cmd, arg);
191 }
192
193 #ifdef CONFIG_COMPAT
194 #define odev_ioctl_compat       odev_ioctl
195 #else
196 #define odev_ioctl_compat       NULL
197 #endif
198
199 static unsigned int
200 odev_poll(struct file *file, poll_table * wait)
201 {
202         struct seq_oss_devinfo *dp;
203         dp = file->private_data;
204         if (snd_BUG_ON(!dp))
205                 return -ENXIO;
206         return snd_seq_oss_poll(dp, file, wait);
207 }
208
209 /*
210  * registration of sequencer minor device
211  */
212
213 static const struct file_operations seq_oss_f_ops =
214 {
215         .owner =        THIS_MODULE,
216         .read =         odev_read,
217         .write =        odev_write,
218         .open =         odev_open,
219         .release =      odev_release,
220         .poll =         odev_poll,
221         .unlocked_ioctl =       odev_ioctl,
222         .compat_ioctl = odev_ioctl_compat,
223         .llseek =       noop_llseek,
224 };
225
226 static int __init
227 register_device(void)
228 {
229         int rc;
230
231         mutex_lock(&register_mutex);
232         if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
233                                           NULL, 0,
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(&register_mutex);
238                 return rc;
239         }
240         if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC,
241                                           NULL, 0,
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(&register_mutex);
247                 return rc;
248         }
249         debug_printk(("device registered\n"));
250         mutex_unlock(&register_mutex);
251         return 0;
252 }
253
254 static void
255 unregister_device(void)
256 {
257         mutex_lock(&register_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(&register_mutex);
264 }
265
266 /*
267  * /proc interface
268  */
269
270 #ifdef CONFIG_PROC_FS
271
272 static struct snd_info_entry *info_entry;
273
274 static void
275 info_read(struct snd_info_entry *entry, struct snd_info_buffer *buf)
276 {
277         mutex_lock(&register_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(&register_mutex);
283 }
284
285
286 static int __init
287 register_proc(void)
288 {
289         struct snd_info_entry *entry;
290
291         entry = snd_info_create_module_entry(THIS_MODULE, SNDRV_SEQ_OSS_PROCNAME, snd_seq_root);
292         if (entry == NULL)
293                 return -ENOMEM;
294
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);
300                 return -ENOMEM;
301         }
302         info_entry = entry;
303         return 0;
304 }
305
306 static void
307 unregister_proc(void)
308 {
309         snd_info_free_entry(info_entry);
310         info_entry = NULL;
311 }
312 #endif /* CONFIG_PROC_FS */