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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 if ((rc = register_device()) < 0)
71 goto error;
72 if ((rc = register_proc()) < 0) {
73 unregister_device();
74 goto error;
75 }
76 if ((rc = snd_seq_oss_create_client()) < 0) {
77 unregister_proc();
78 unregister_device();
79 goto error;
80 }
81
82 rc = snd_seq_driver_register(&seq_oss_synth_driver);
83 if (rc < 0) {
84 snd_seq_oss_delete_client();
85 unregister_proc();
86 unregister_device();
87 goto error;
88 }
89
90
91 snd_seq_oss_synth_init();
92
93 error:
94 return rc;
95}
96
97static void __exit alsa_seq_oss_exit(void)
98{
99 snd_seq_driver_unregister(&seq_oss_synth_driver);
100 snd_seq_oss_delete_client();
101 unregister_proc();
102 unregister_device();
103}
104
105module_init(alsa_seq_oss_init)
106module_exit(alsa_seq_oss_exit)
107
108
109
110
111
112static DEFINE_MUTEX(register_mutex);
113
114static int
115odev_open(struct inode *inode, struct file *file)
116{
117 int level, rc;
118
119 if (iminor(inode) == SNDRV_MINOR_OSS_MUSIC)
120 level = SNDRV_SEQ_OSS_MODE_MUSIC;
121 else
122 level = SNDRV_SEQ_OSS_MODE_SYNTH;
123
124 mutex_lock(®ister_mutex);
125 rc = snd_seq_oss_open(file, level);
126 mutex_unlock(®ister_mutex);
127
128 return rc;
129}
130
131static int
132odev_release(struct inode *inode, struct file *file)
133{
134 struct seq_oss_devinfo *dp;
135
136 if ((dp = file->private_data) == NULL)
137 return 0;
138
139 mutex_lock(®ister_mutex);
140 snd_seq_oss_release(dp);
141 mutex_unlock(®ister_mutex);
142
143 return 0;
144}
145
146static ssize_t
147odev_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
148{
149 struct seq_oss_devinfo *dp;
150 dp = file->private_data;
151 if (snd_BUG_ON(!dp))
152 return -ENXIO;
153 return snd_seq_oss_read(dp, buf, count);
154}
155
156
157static ssize_t
158odev_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
159{
160 struct seq_oss_devinfo *dp;
161 dp = file->private_data;
162 if (snd_BUG_ON(!dp))
163 return -ENXIO;
164 return snd_seq_oss_write(dp, buf, count, file);
165}
166
167static long
168odev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
169{
170 struct seq_oss_devinfo *dp;
171 dp = file->private_data;
172 if (snd_BUG_ON(!dp))
173 return -ENXIO;
174 return snd_seq_oss_ioctl(dp, cmd, arg);
175}
176
177#ifdef CONFIG_COMPAT
178static long odev_ioctl_compat(struct file *file, unsigned int cmd,
179 unsigned long arg)
180{
181 return odev_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
182}
183#else
184#define odev_ioctl_compat NULL
185#endif
186
187static __poll_t
188odev_poll(struct file *file, poll_table * wait)
189{
190 struct seq_oss_devinfo *dp;
191 dp = file->private_data;
192 if (snd_BUG_ON(!dp))
193 return EPOLLERR;
194 return snd_seq_oss_poll(dp, file, wait);
195}
196
197
198
199
200
201static const struct file_operations seq_oss_f_ops =
202{
203 .owner = THIS_MODULE,
204 .read = odev_read,
205 .write = odev_write,
206 .open = odev_open,
207 .release = odev_release,
208 .poll = odev_poll,
209 .unlocked_ioctl = odev_ioctl,
210 .compat_ioctl = odev_ioctl_compat,
211 .llseek = noop_llseek,
212};
213
214static int __init
215register_device(void)
216{
217 int rc;
218
219 mutex_lock(®ister_mutex);
220 if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
221 NULL, 0,
222 &seq_oss_f_ops, NULL)) < 0) {
223 pr_err("ALSA: seq_oss: can't register device seq\n");
224 mutex_unlock(®ister_mutex);
225 return rc;
226 }
227 if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC,
228 NULL, 0,
229 &seq_oss_f_ops, NULL)) < 0) {
230 pr_err("ALSA: seq_oss: can't register device music\n");
231 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
232 mutex_unlock(®ister_mutex);
233 return rc;
234 }
235 mutex_unlock(®ister_mutex);
236 return 0;
237}
238
239static void
240unregister_device(void)
241{
242 mutex_lock(®ister_mutex);
243 if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC, NULL, 0) < 0)
244 pr_err("ALSA: seq_oss: error unregister device music\n");
245 if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
246 pr_err("ALSA: seq_oss: error unregister device seq\n");
247 mutex_unlock(®ister_mutex);
248}
249
250
251
252
253
254#ifdef CONFIG_SND_PROC_FS
255
256static struct snd_info_entry *info_entry;
257
258static void
259info_read(struct snd_info_entry *entry, struct snd_info_buffer *buf)
260{
261 mutex_lock(®ister_mutex);
262 snd_iprintf(buf, "OSS sequencer emulation version %s\n", SNDRV_SEQ_OSS_VERSION_STR);
263 snd_seq_oss_system_info_read(buf);
264 snd_seq_oss_synth_info_read(buf);
265 snd_seq_oss_midi_info_read(buf);
266 mutex_unlock(®ister_mutex);
267}
268
269
270static int __init
271register_proc(void)
272{
273 struct snd_info_entry *entry;
274
275 entry = snd_info_create_module_entry(THIS_MODULE, SNDRV_SEQ_OSS_PROCNAME, snd_seq_root);
276 if (entry == NULL)
277 return -ENOMEM;
278
279 entry->content = SNDRV_INFO_CONTENT_TEXT;
280 entry->private_data = NULL;
281 entry->c.text.read = info_read;
282 if (snd_info_register(entry) < 0) {
283 snd_info_free_entry(entry);
284 return -ENOMEM;
285 }
286 info_entry = entry;
287 return 0;
288}
289
290static void
291unregister_proc(void)
292{
293 snd_info_free_entry(info_entry);
294 info_entry = NULL;
295}
296#endif
297
