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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
34
35MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
36MODULE_DESCRIPTION("OSS-compatible sequencer module");
37MODULE_LICENSE("GPL");
38
39MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_SEQUENCER);
40MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MUSIC);
41
42
43
44
45
46static int register_device(void);
47static void unregister_device(void);
48#ifdef CONFIG_SND_PROC_FS
49static int register_proc(void);
50static void unregister_proc(void);
51#else
52static inline int register_proc(void) { return 0; }
53static inline void unregister_proc(void) {}
54#endif
55
56static int odev_open(struct inode *inode, struct file *file);
57static int odev_release(struct inode *inode, struct file *file);
58static ssize_t odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset);
59static ssize_t odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset);
60static long odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
61static unsigned int odev_poll(struct file *file, poll_table * wait);
62
63
64
65
66
67
68static struct snd_seq_driver seq_oss_synth_driver = {
69 .driver = {
70 .name = KBUILD_MODNAME,
71 .probe = snd_seq_oss_synth_probe,
72 .remove = snd_seq_oss_synth_remove,
73 },
74 .id = SNDRV_SEQ_DEV_ID_OSS,
75 .argsize = sizeof(struct snd_seq_oss_reg),
76};
77
78static int __init alsa_seq_oss_init(void)
79{
80 int rc;
81
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 rc = snd_seq_driver_register(&seq_oss_synth_driver);
95 if (rc < 0) {
96 snd_seq_oss_delete_client();
97 unregister_proc();
98 unregister_device();
99 goto error;
100 }
101
102
103 snd_seq_oss_synth_init();
104
105 error:
106 return rc;
107}
108
109static void __exit alsa_seq_oss_exit(void)
110{
111 snd_seq_driver_unregister(&seq_oss_synth_driver);
112 snd_seq_oss_delete_client();
113 unregister_proc();
114 unregister_device();
115}
116
117module_init(alsa_seq_oss_init)
118module_exit(alsa_seq_oss_exit)
119
120
121
122
123
124static DEFINE_MUTEX(register_mutex);
125
126static int
127odev_open(struct inode *inode, struct file *file)
128{
129 int level, rc;
130
131 if (iminor(inode) == SNDRV_MINOR_OSS_MUSIC)
132 level = SNDRV_SEQ_OSS_MODE_MUSIC;
133 else
134 level = SNDRV_SEQ_OSS_MODE_SYNTH;
135
136 mutex_lock(®ister_mutex);
137 rc = snd_seq_oss_open(file, level);
138 mutex_unlock(®ister_mutex);
139
140 return rc;
141}
142
143static int
144odev_release(struct inode *inode, struct file *file)
145{
146 struct seq_oss_devinfo *dp;
147
148 if ((dp = file->private_data) == NULL)
149 return 0;
150
151 snd_seq_oss_drain_write(dp);
152
153 mutex_lock(®ister_mutex);
154 snd_seq_oss_release(dp);
155 mutex_unlock(®ister_mutex);
156
157 return 0;
158}
159
160static ssize_t
161odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
162{
163 struct seq_oss_devinfo *dp;
164 dp = file->private_data;
165 if (snd_BUG_ON(!dp))
166 return -ENXIO;
167 return snd_seq_oss_read(dp, buf, count);
168}
169
170
171static ssize_t
172odev_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 if (snd_BUG_ON(!dp))
177 return -ENXIO;
178 return snd_seq_oss_write(dp, buf, count, file);
179}
180
181static long
182odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
183{
184 struct seq_oss_devinfo *dp;
185 dp = file->private_data;
186 if (snd_BUG_ON(!dp))
187 return -ENXIO;
188 return snd_seq_oss_ioctl(dp, cmd, arg);
189}
190
191#ifdef CONFIG_COMPAT
192#define odev_ioctl_compat odev_ioctl
193#else
194#define odev_ioctl_compat NULL
195#endif
196
197static unsigned int
198odev_poll(struct file *file, poll_table * wait)
199{
200 struct seq_oss_devinfo *dp;
201 dp = file->private_data;
202 if (snd_BUG_ON(!dp))
203 return -ENXIO;
204 return snd_seq_oss_poll(dp, file, wait);
205}
206
207
208
209
210
211static const struct file_operations seq_oss_f_ops =
212{
213 .owner = THIS_MODULE,
214 .read = odev_read,
215 .write = odev_write,
216 .open = odev_open,
217 .release = odev_release,
218 .poll = odev_poll,
219 .unlocked_ioctl = odev_ioctl,
220 .compat_ioctl = odev_ioctl_compat,
221 .llseek = noop_llseek,
222};
223
224static int __init
225register_device(void)
226{
227 int rc;
228
229 mutex_lock(®ister_mutex);
230 if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
231 NULL, 0,
232 &seq_oss_f_ops, NULL)) < 0) {
233 pr_err("ALSA: seq_oss: can't register device seq\n");
234 mutex_unlock(®ister_mutex);
235 return rc;
236 }
237 if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC,
238 NULL, 0,
239 &seq_oss_f_ops, NULL)) < 0) {
240 pr_err("ALSA: seq_oss: can't register device music\n");
241 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
242 mutex_unlock(®ister_mutex);
243 return rc;
244 }
245 mutex_unlock(®ister_mutex);
246 return 0;
247}
248
249static void
250unregister_device(void)
251{
252 mutex_lock(®ister_mutex);
253 if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC, NULL, 0) < 0)
254 pr_err("ALSA: seq_oss: error unregister device music\n");
255 if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
256 pr_err("ALSA: seq_oss: error unregister device seq\n");
257 mutex_unlock(®ister_mutex);
258}
259
260
261
262
263
264#ifdef CONFIG_SND_PROC_FS
265
266static struct snd_info_entry *info_entry;
267
268static void
269info_read(struct snd_info_entry *entry, struct snd_info_buffer *buf)
270{
271 mutex_lock(®ister_mutex);
272 snd_iprintf(buf, "OSS sequencer emulation version %s\n", SNDRV_SEQ_OSS_VERSION_STR);
273 snd_seq_oss_system_info_read(buf);
274 snd_seq_oss_synth_info_read(buf);
275 snd_seq_oss_midi_info_read(buf);
276 mutex_unlock(®ister_mutex);
277}
278
279
280static int __init
281register_proc(void)
282{
283 struct snd_info_entry *entry;
284
285 entry = snd_info_create_module_entry(THIS_MODULE, SNDRV_SEQ_OSS_PROCNAME, snd_seq_root);
286 if (entry == NULL)
287 return -ENOMEM;
288
289 entry->content = SNDRV_INFO_CONTENT_TEXT;
290 entry->private_data = NULL;
291 entry->c.text.read = info_read;
292 if (snd_info_register(entry) < 0) {
293 snd_info_free_entry(entry);
294 return -ENOMEM;
295 }
296 info_entry = entry;
297 return 0;
298}
299
300static void
301unregister_proc(void)
302{
303 snd_info_free_entry(info_entry);
304 info_entry = NULL;
305}
306#endif
307