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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"
32
33
34
35
36MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
37MODULE_DESCRIPTION("OSS-compatible sequencer module");
38MODULE_LICENSE("GPL");
39
40MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_SEQUENCER);
41MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MUSIC);
42
43
44
45
46
47static int register_device(void);
48static void unregister_device(void);
49#ifdef CONFIG_SND_PROC_FS
50static int register_proc(void);
51static void unregister_proc(void);
52#else
53static inline int register_proc(void) { return 0; }
54static inline void unregister_proc(void) {}
55#endif
56
57static int odev_open(struct inode *inode, struct file *file);
58static int odev_release(struct inode *inode, struct file *file);
59static ssize_t odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset);
60static ssize_t odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset);
61static long odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
62static unsigned int odev_poll(struct file *file, poll_table * wait);
63
64
65
66
67
68
69static struct snd_seq_driver seq_oss_synth_driver = {
70 .driver = {
71 .name = KBUILD_MODNAME,
72 .probe = snd_seq_oss_synth_probe,
73 .remove = snd_seq_oss_synth_remove,
74 },
75 .id = SNDRV_SEQ_DEV_ID_OSS,
76 .argsize = sizeof(struct snd_seq_oss_reg),
77};
78
79static int __init alsa_seq_oss_init(void)
80{
81 int rc;
82
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 rc = snd_seq_driver_register(&seq_oss_synth_driver);
96 if (rc < 0) {
97 snd_seq_oss_delete_client();
98 unregister_proc();
99 unregister_device();
100 goto error;
101 }
102
103
104 snd_seq_oss_synth_init();
105
106 error:
107 return rc;
108}
109
110static void __exit alsa_seq_oss_exit(void)
111{
112 snd_seq_driver_unregister(&seq_oss_synth_driver);
113 snd_seq_oss_delete_client();
114 unregister_proc();
115 unregister_device();
116}
117
118module_init(alsa_seq_oss_init)
119module_exit(alsa_seq_oss_exit)
120
121
122
123
124
125static DEFINE_MUTEX(register_mutex);
126
127static int
128odev_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 mutex_lock(®ister_mutex);
138 rc = snd_seq_oss_open(file, level);
139 mutex_unlock(®ister_mutex);
140
141 return rc;
142}
143
144static int
145odev_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 mutex_lock(®ister_mutex);
153 snd_seq_oss_release(dp);
154 mutex_unlock(®ister_mutex);
155
156 return 0;
157}
158
159static ssize_t
160odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
161{
162 struct seq_oss_devinfo *dp;
163 dp = file->private_data;
164 if (snd_BUG_ON(!dp))
165 return -ENXIO;
166 return snd_seq_oss_read(dp, buf, count);
167}
168
169
170static ssize_t
171odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
172{
173 struct seq_oss_devinfo *dp;
174 dp = file->private_data;
175 if (snd_BUG_ON(!dp))
176 return -ENXIO;
177 return snd_seq_oss_write(dp, buf, count, file);
178}
179
180static long
181odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
182{
183 struct seq_oss_devinfo *dp;
184 dp = file->private_data;
185 if (snd_BUG_ON(!dp))
186 return -ENXIO;
187 return snd_seq_oss_ioctl(dp, cmd, arg);
188}
189
190#ifdef CONFIG_COMPAT
191static long odev_ioctl_compat(struct file *file, unsigned int cmd,
192 unsigned long arg)
193{
194 return odev_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
195}
196#else
197#define odev_ioctl_compat NULL
198#endif
199
200static unsigned int
201odev_poll(struct file *file, poll_table * wait)
202{
203 struct seq_oss_devinfo *dp;
204 dp = file->private_data;
205 if (snd_BUG_ON(!dp))
206 return -ENXIO;
207 return snd_seq_oss_poll(dp, file, wait);
208}
209
210
211
212
213
214static const struct file_operations seq_oss_f_ops =
215{
216 .owner = THIS_MODULE,
217 .read = odev_read,
218 .write = odev_write,
219 .open = odev_open,
220 .release = odev_release,
221 .poll = odev_poll,
222 .unlocked_ioctl = odev_ioctl,
223 .compat_ioctl = odev_ioctl_compat,
224 .llseek = noop_llseek,
225};
226
227static int __init
228register_device(void)
229{
230 int rc;
231
232 mutex_lock(®ister_mutex);
233 if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
234 NULL, 0,
235 &seq_oss_f_ops, NULL)) < 0) {
236 pr_err("ALSA: seq_oss: can't register device seq\n");
237 mutex_unlock(®ister_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)) < 0) {
243 pr_err("ALSA: seq_oss: can't register device music\n");
244 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
245 mutex_unlock(®ister_mutex);
246 return rc;
247 }
248 mutex_unlock(®ister_mutex);
249 return 0;
250}
251
252static void
253unregister_device(void)
254{
255 mutex_lock(®ister_mutex);
256 if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC, NULL, 0) < 0)
257 pr_err("ALSA: seq_oss: error unregister device music\n");
258 if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
259 pr_err("ALSA: seq_oss: error unregister device seq\n");
260 mutex_unlock(®ister_mutex);
261}
262
263
264
265
266
267#ifdef CONFIG_SND_PROC_FS
268
269static struct snd_info_entry *info_entry;
270
271static void
272info_read(struct snd_info_entry *entry, struct snd_info_buffer *buf)
273{
274 mutex_lock(®ister_mutex);
275 snd_iprintf(buf, "OSS sequencer emulation version %s\n", SNDRV_SEQ_OSS_VERSION_STR);
276 snd_seq_oss_system_info_read(buf);
277 snd_seq_oss_synth_info_read(buf);
278 snd_seq_oss_midi_info_read(buf);
279 mutex_unlock(®ister_mutex);
280}
281
282
283static int __init
284register_proc(void)
285{
286 struct snd_info_entry *entry;
287
288 entry = snd_info_create_module_entry(THIS_MODULE, SNDRV_SEQ_OSS_PROCNAME, snd_seq_root);
289 if (entry == NULL)
290 return -ENOMEM;
291
292 entry->content = SNDRV_INFO_CONTENT_TEXT;
293 entry->private_data = NULL;
294 entry->c.text.read = info_read;
295 if (snd_info_register(entry) < 0) {
296 snd_info_free_entry(entry);
297 return -ENOMEM;
298 }
299 info_entry = entry;
300 return 0;
301}
302
303static void
304unregister_proc(void)
305{
306 snd_info_free_entry(info_entry);
307 info_entry = NULL;
308}
309#endif
310