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10#include <linux/init.h>
11#include <linux/module.h>
12#include <linux/mutex.h>
13#include <linux/compat.h>
14#include <sound/core.h>
15#include <sound/minors.h>
16#include <sound/initval.h>
17#include "seq_oss_device.h"
18#include "seq_oss_synth.h"
19
20
21
22
23MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
24MODULE_DESCRIPTION("OSS-compatible sequencer module");
25MODULE_LICENSE("GPL");
26
27MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_SEQUENCER);
28MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MUSIC);
29
30
31
32
33
34static int register_device(void);
35static void unregister_device(void);
36#ifdef CONFIG_SND_PROC_FS
37static int register_proc(void);
38static void unregister_proc(void);
39#else
40static inline int register_proc(void) { return 0; }
41static inline void unregister_proc(void) {}
42#endif
43
44static int odev_open(struct inode *inode, struct file *file);
45static int odev_release(struct inode *inode, struct file *file);
46static ssize_t odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset);
47static ssize_t odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset);
48static long odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
49static __poll_t odev_poll(struct file *file, poll_table * wait);
50
51
52
53
54
55
56static struct snd_seq_driver seq_oss_synth_driver = {
57 .driver = {
58 .name = KBUILD_MODNAME,
59 .probe = snd_seq_oss_synth_probe,
60 .remove = snd_seq_oss_synth_remove,
61 },
62 .id = SNDRV_SEQ_DEV_ID_OSS,
63 .argsize = sizeof(struct snd_seq_oss_reg),
64};
65
66static int __init alsa_seq_oss_init(void)
67{
68 int rc;
69
70 rc = register_device();
71 if (rc < 0)
72 goto error;
73 rc = register_proc();
74 if (rc < 0) {
75 unregister_device();
76 goto error;
77 }
78 rc = snd_seq_oss_create_client();
79 if (rc < 0) {
80 unregister_proc();
81 unregister_device();
82 goto error;
83 }
84
85 rc = snd_seq_driver_register(&seq_oss_synth_driver);
86 if (rc < 0) {
87 snd_seq_oss_delete_client();
88 unregister_proc();
89 unregister_device();
90 goto error;
91 }
92
93
94 snd_seq_oss_synth_init();
95
96 error:
97 return rc;
98}
99
100static void __exit alsa_seq_oss_exit(void)
101{
102 snd_seq_driver_unregister(&seq_oss_synth_driver);
103 snd_seq_oss_delete_client();
104 unregister_proc();
105 unregister_device();
106}
107
108module_init(alsa_seq_oss_init)
109module_exit(alsa_seq_oss_exit)
110
111
112
113
114
115static DEFINE_MUTEX(register_mutex);
116
117static int
118odev_open(struct inode *inode, struct file *file)
119{
120 int level, rc;
121
122 if (iminor(inode) == SNDRV_MINOR_OSS_MUSIC)
123 level = SNDRV_SEQ_OSS_MODE_MUSIC;
124 else
125 level = SNDRV_SEQ_OSS_MODE_SYNTH;
126
127 mutex_lock(®ister_mutex);
128 rc = snd_seq_oss_open(file, level);
129 mutex_unlock(®ister_mutex);
130
131 return rc;
132}
133
134static int
135odev_release(struct inode *inode, struct file *file)
136{
137 struct seq_oss_devinfo *dp;
138
139 dp = file->private_data;
140 if (!dp)
141 return 0;
142
143 mutex_lock(®ister_mutex);
144 snd_seq_oss_release(dp);
145 mutex_unlock(®ister_mutex);
146
147 return 0;
148}
149
150static ssize_t
151odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
152{
153 struct seq_oss_devinfo *dp;
154 dp = file->private_data;
155 if (snd_BUG_ON(!dp))
156 return -ENXIO;
157 return snd_seq_oss_read(dp, buf, count);
158}
159
160
161static ssize_t
162odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
163{
164 struct seq_oss_devinfo *dp;
165 dp = file->private_data;
166 if (snd_BUG_ON(!dp))
167 return -ENXIO;
168 return snd_seq_oss_write(dp, buf, count, file);
169}
170
171static long
172odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
173{
174 struct seq_oss_devinfo *dp;
175 long rc;
176
177 dp = file->private_data;
178 if (snd_BUG_ON(!dp))
179 return -ENXIO;
180
181 if (cmd != SNDCTL_SEQ_SYNC &&
182 mutex_lock_interruptible(®ister_mutex))
183 return -ERESTARTSYS;
184 rc = snd_seq_oss_ioctl(dp, cmd, arg);
185 if (cmd != SNDCTL_SEQ_SYNC)
186 mutex_unlock(®ister_mutex);
187 return rc;
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 __poll_t
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 EPOLLERR;
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 rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
234 NULL, 0,
235 &seq_oss_f_ops, NULL);
236 if (rc < 0) {
237 pr_err("ALSA: seq_oss: can't register device seq\n");
238 mutex_unlock(®ister_mutex);
239 return rc;
240 }
241 rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC,
242 NULL, 0,
243 &seq_oss_f_ops, NULL);
244 if (rc < 0) {
245 pr_err("ALSA: seq_oss: can't register device music\n");
246 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
247 mutex_unlock(®ister_mutex);
248 return rc;
249 }
250 mutex_unlock(®ister_mutex);
251 return 0;
252}
253
254static void
255unregister_device(void)
256{
257 mutex_lock(®ister_mutex);
258 if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC, NULL, 0) < 0)
259 pr_err("ALSA: seq_oss: error unregister device music\n");
260 if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
261 pr_err("ALSA: seq_oss: error unregister device seq\n");
262 mutex_unlock(®ister_mutex);
263}
264
265
266
267
268
269#ifdef CONFIG_SND_PROC_FS
270
271static struct snd_info_entry *info_entry;
272
273static void
274info_read(struct snd_info_entry *entry, struct snd_info_buffer *buf)
275{
276 mutex_lock(®ister_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 mutex_unlock(®ister_mutex);
282}
283
284
285static int __init
286register_proc(void)
287{
288 struct snd_info_entry *entry;
289
290 entry = snd_info_create_module_entry(THIS_MODULE, SNDRV_SEQ_OSS_PROCNAME, snd_seq_root);
291 if (entry == NULL)
292 return -ENOMEM;
293
294 entry->content = SNDRV_INFO_CONTENT_TEXT;
295 entry->private_data = NULL;
296 entry->c.text.read = info_read;
297 if (snd_info_register(entry) < 0) {
298 snd_info_free_entry(entry);
299 return -ENOMEM;
300 }
301 info_entry = entry;
302 return 0;
303}
304
305static void
306unregister_proc(void)
307{
308 snd_info_free_entry(info_entry);
309 info_entry = NULL;
310}
311#endif
312
