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1da177e4 LT |
1 | /* |
2 | * Virtual Raw MIDI client on Sequencer | |
3 | * | |
4 | * Copyright (c) 2000 by Takashi Iwai <tiwai@suse.de>, | |
5 | * Jaroslav Kysela <perex@perex.cz> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | */ | |
22 | ||
23 | /* | |
24 | * Virtual Raw MIDI client | |
25 | * | |
26 | * The virtual rawmidi client is a sequencer client which associate | |
27 | * a rawmidi device file. The created rawmidi device file can be | |
28 | * accessed as a normal raw midi, but its MIDI source and destination | |
29 | * are arbitrary. For example, a user-client software synth connected | |
30 | * to this port can be used as a normal midi device as well. | |
31 | * | |
32 | * The virtual rawmidi device accepts also multiple opens. Each file | |
33 | * has its own input buffer, so that no conflict would occur. The drain | |
34 | * of input/output buffer acts only to the local buffer. | |
35 | * | |
36 | */ | |
37 | ||
38 | #include <sound/driver.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/wait.h> | |
41 | #include <linux/sched.h> | |
42 | #include <linux/slab.h> | |
43 | #include <sound/core.h> | |
44 | #include <sound/rawmidi.h> | |
45 | #include <sound/info.h> | |
46 | #include <sound/control.h> | |
47 | #include <sound/minors.h> | |
48 | #include <sound/seq_kernel.h> | |
49 | #include <sound/seq_midi_event.h> | |
50 | #include <sound/seq_virmidi.h> | |
51 | ||
52 | MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); | |
53 | MODULE_DESCRIPTION("Virtual Raw MIDI client on Sequencer"); | |
54 | MODULE_LICENSE("GPL"); | |
55 | ||
56 | /* | |
57 | * initialize an event record | |
58 | */ | |
c7e0b5bf TI |
59 | static void snd_virmidi_init_event(struct snd_virmidi *vmidi, |
60 | struct snd_seq_event *ev) | |
1da177e4 LT |
61 | { |
62 | memset(ev, 0, sizeof(*ev)); | |
63 | ev->source.port = vmidi->port; | |
64 | switch (vmidi->seq_mode) { | |
65 | case SNDRV_VIRMIDI_SEQ_DISPATCH: | |
66 | ev->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; | |
67 | break; | |
68 | case SNDRV_VIRMIDI_SEQ_ATTACH: | |
69 | /* FIXME: source and destination are same - not good.. */ | |
70 | ev->dest.client = vmidi->client; | |
71 | ev->dest.port = vmidi->port; | |
72 | break; | |
73 | } | |
74 | ev->type = SNDRV_SEQ_EVENT_NONE; | |
75 | } | |
76 | ||
77 | /* | |
78 | * decode input event and put to read buffer of each opened file | |
79 | */ | |
c7e0b5bf TI |
80 | static int snd_virmidi_dev_receive_event(struct snd_virmidi_dev *rdev, |
81 | struct snd_seq_event *ev) | |
1da177e4 | 82 | { |
c7e0b5bf | 83 | struct snd_virmidi *vmidi; |
1da177e4 LT |
84 | struct list_head *list; |
85 | unsigned char msg[4]; | |
86 | int len; | |
87 | ||
88 | read_lock(&rdev->filelist_lock); | |
89 | list_for_each(list, &rdev->filelist) { | |
c7e0b5bf | 90 | vmidi = list_entry(list, struct snd_virmidi, list); |
1da177e4 LT |
91 | if (!vmidi->trigger) |
92 | continue; | |
93 | if (ev->type == SNDRV_SEQ_EVENT_SYSEX) { | |
94 | if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARIABLE) | |
95 | continue; | |
96 | snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)snd_rawmidi_receive, vmidi->substream); | |
97 | } else { | |
98 | len = snd_midi_event_decode(vmidi->parser, msg, sizeof(msg), ev); | |
99 | if (len > 0) | |
100 | snd_rawmidi_receive(vmidi->substream, msg, len); | |
101 | } | |
102 | } | |
103 | read_unlock(&rdev->filelist_lock); | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | /* | |
109 | * receive an event from the remote virmidi port | |
110 | * | |
111 | * for rawmidi inputs, you can call this function from the event | |
112 | * handler of a remote port which is attached to the virmidi via | |
113 | * SNDRV_VIRMIDI_SEQ_ATTACH. | |
114 | */ | |
123992f7 | 115 | #if 0 |
c7e0b5bf | 116 | int snd_virmidi_receive(struct snd_rawmidi *rmidi, struct snd_seq_event *ev) |
1da177e4 | 117 | { |
c7e0b5bf | 118 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
119 | |
120 | rdev = rmidi->private_data; | |
121 | return snd_virmidi_dev_receive_event(rdev, ev); | |
122 | } | |
123992f7 | 123 | #endif /* 0 */ |
1da177e4 LT |
124 | |
125 | /* | |
126 | * event handler of virmidi port | |
127 | */ | |
c7e0b5bf | 128 | static int snd_virmidi_event_input(struct snd_seq_event *ev, int direct, |
1da177e4 LT |
129 | void *private_data, int atomic, int hop) |
130 | { | |
c7e0b5bf | 131 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
132 | |
133 | rdev = private_data; | |
134 | if (!(rdev->flags & SNDRV_VIRMIDI_USE)) | |
135 | return 0; /* ignored */ | |
136 | return snd_virmidi_dev_receive_event(rdev, ev); | |
137 | } | |
138 | ||
139 | /* | |
140 | * trigger rawmidi stream for input | |
141 | */ | |
c7e0b5bf | 142 | static void snd_virmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 143 | { |
c7e0b5bf | 144 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
1da177e4 LT |
145 | |
146 | if (up) { | |
147 | vmidi->trigger = 1; | |
148 | } else { | |
149 | vmidi->trigger = 0; | |
150 | } | |
151 | } | |
152 | ||
153 | /* | |
154 | * trigger rawmidi stream for output | |
155 | */ | |
c7e0b5bf | 156 | static void snd_virmidi_output_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 157 | { |
c7e0b5bf | 158 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
1da177e4 LT |
159 | int count, res; |
160 | unsigned char buf[32], *pbuf; | |
161 | ||
162 | if (up) { | |
163 | vmidi->trigger = 1; | |
164 | if (vmidi->seq_mode == SNDRV_VIRMIDI_SEQ_DISPATCH && | |
165 | !(vmidi->rdev->flags & SNDRV_VIRMIDI_SUBSCRIBE)) { | |
166 | snd_rawmidi_transmit_ack(substream, substream->runtime->buffer_size - substream->runtime->avail); | |
167 | return; /* ignored */ | |
168 | } | |
169 | if (vmidi->event.type != SNDRV_SEQ_EVENT_NONE) { | |
62c5549e | 170 | if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0) |
1da177e4 LT |
171 | return; |
172 | vmidi->event.type = SNDRV_SEQ_EVENT_NONE; | |
173 | } | |
174 | while (1) { | |
175 | count = snd_rawmidi_transmit_peek(substream, buf, sizeof(buf)); | |
176 | if (count <= 0) | |
177 | break; | |
178 | pbuf = buf; | |
179 | while (count > 0) { | |
180 | res = snd_midi_event_encode(vmidi->parser, pbuf, count, &vmidi->event); | |
181 | if (res < 0) { | |
182 | snd_midi_event_reset_encode(vmidi->parser); | |
183 | continue; | |
184 | } | |
185 | snd_rawmidi_transmit_ack(substream, res); | |
186 | pbuf += res; | |
187 | count -= res; | |
188 | if (vmidi->event.type != SNDRV_SEQ_EVENT_NONE) { | |
62c5549e | 189 | if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0) |
1da177e4 LT |
190 | return; |
191 | vmidi->event.type = SNDRV_SEQ_EVENT_NONE; | |
192 | } | |
193 | } | |
194 | } | |
195 | } else { | |
196 | vmidi->trigger = 0; | |
197 | } | |
198 | } | |
199 | ||
200 | /* | |
201 | * open rawmidi handle for input | |
202 | */ | |
c7e0b5bf | 203 | static int snd_virmidi_input_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 204 | { |
c7e0b5bf TI |
205 | struct snd_virmidi_dev *rdev = substream->rmidi->private_data; |
206 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
207 | struct snd_virmidi *vmidi; | |
1da177e4 LT |
208 | unsigned long flags; |
209 | ||
ecca82b4 | 210 | vmidi = kzalloc(sizeof(*vmidi), GFP_KERNEL); |
1da177e4 LT |
211 | if (vmidi == NULL) |
212 | return -ENOMEM; | |
213 | vmidi->substream = substream; | |
214 | if (snd_midi_event_new(0, &vmidi->parser) < 0) { | |
215 | kfree(vmidi); | |
216 | return -ENOMEM; | |
217 | } | |
218 | vmidi->seq_mode = rdev->seq_mode; | |
219 | vmidi->client = rdev->client; | |
220 | vmidi->port = rdev->port; | |
221 | runtime->private_data = vmidi; | |
222 | write_lock_irqsave(&rdev->filelist_lock, flags); | |
223 | list_add_tail(&vmidi->list, &rdev->filelist); | |
224 | write_unlock_irqrestore(&rdev->filelist_lock, flags); | |
225 | vmidi->rdev = rdev; | |
226 | return 0; | |
227 | } | |
228 | ||
229 | /* | |
230 | * open rawmidi handle for output | |
231 | */ | |
c7e0b5bf | 232 | static int snd_virmidi_output_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 233 | { |
c7e0b5bf TI |
234 | struct snd_virmidi_dev *rdev = substream->rmidi->private_data; |
235 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
236 | struct snd_virmidi *vmidi; | |
1da177e4 | 237 | |
ecca82b4 | 238 | vmidi = kzalloc(sizeof(*vmidi), GFP_KERNEL); |
1da177e4 LT |
239 | if (vmidi == NULL) |
240 | return -ENOMEM; | |
241 | vmidi->substream = substream; | |
242 | if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &vmidi->parser) < 0) { | |
243 | kfree(vmidi); | |
244 | return -ENOMEM; | |
245 | } | |
246 | vmidi->seq_mode = rdev->seq_mode; | |
247 | vmidi->client = rdev->client; | |
248 | vmidi->port = rdev->port; | |
249 | snd_virmidi_init_event(vmidi, &vmidi->event); | |
250 | vmidi->rdev = rdev; | |
251 | runtime->private_data = vmidi; | |
252 | return 0; | |
253 | } | |
254 | ||
255 | /* | |
256 | * close rawmidi handle for input | |
257 | */ | |
c7e0b5bf | 258 | static int snd_virmidi_input_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 259 | { |
c7e0b5bf | 260 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
1da177e4 LT |
261 | snd_midi_event_free(vmidi->parser); |
262 | list_del(&vmidi->list); | |
263 | substream->runtime->private_data = NULL; | |
264 | kfree(vmidi); | |
265 | return 0; | |
266 | } | |
267 | ||
268 | /* | |
269 | * close rawmidi handle for output | |
270 | */ | |
c7e0b5bf | 271 | static int snd_virmidi_output_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 272 | { |
c7e0b5bf | 273 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
1da177e4 LT |
274 | snd_midi_event_free(vmidi->parser); |
275 | substream->runtime->private_data = NULL; | |
276 | kfree(vmidi); | |
277 | return 0; | |
278 | } | |
279 | ||
280 | /* | |
281 | * subscribe callback - allow output to rawmidi device | |
282 | */ | |
c7e0b5bf TI |
283 | static int snd_virmidi_subscribe(void *private_data, |
284 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 285 | { |
c7e0b5bf | 286 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
287 | |
288 | rdev = private_data; | |
289 | if (!try_module_get(rdev->card->module)) | |
290 | return -EFAULT; | |
291 | rdev->flags |= SNDRV_VIRMIDI_SUBSCRIBE; | |
292 | return 0; | |
293 | } | |
294 | ||
295 | /* | |
296 | * unsubscribe callback - disallow output to rawmidi device | |
297 | */ | |
c7e0b5bf TI |
298 | static int snd_virmidi_unsubscribe(void *private_data, |
299 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 300 | { |
c7e0b5bf | 301 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
302 | |
303 | rdev = private_data; | |
304 | rdev->flags &= ~SNDRV_VIRMIDI_SUBSCRIBE; | |
305 | module_put(rdev->card->module); | |
306 | return 0; | |
307 | } | |
308 | ||
309 | ||
310 | /* | |
311 | * use callback - allow input to rawmidi device | |
312 | */ | |
c7e0b5bf TI |
313 | static int snd_virmidi_use(void *private_data, |
314 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 315 | { |
c7e0b5bf | 316 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
317 | |
318 | rdev = private_data; | |
319 | if (!try_module_get(rdev->card->module)) | |
320 | return -EFAULT; | |
321 | rdev->flags |= SNDRV_VIRMIDI_USE; | |
322 | return 0; | |
323 | } | |
324 | ||
325 | /* | |
326 | * unuse callback - disallow input to rawmidi device | |
327 | */ | |
c7e0b5bf TI |
328 | static int snd_virmidi_unuse(void *private_data, |
329 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 330 | { |
c7e0b5bf | 331 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
332 | |
333 | rdev = private_data; | |
334 | rdev->flags &= ~SNDRV_VIRMIDI_USE; | |
335 | module_put(rdev->card->module); | |
336 | return 0; | |
337 | } | |
338 | ||
339 | ||
340 | /* | |
341 | * Register functions | |
342 | */ | |
343 | ||
c7e0b5bf | 344 | static struct snd_rawmidi_ops snd_virmidi_input_ops = { |
1da177e4 LT |
345 | .open = snd_virmidi_input_open, |
346 | .close = snd_virmidi_input_close, | |
347 | .trigger = snd_virmidi_input_trigger, | |
348 | }; | |
349 | ||
c7e0b5bf | 350 | static struct snd_rawmidi_ops snd_virmidi_output_ops = { |
1da177e4 LT |
351 | .open = snd_virmidi_output_open, |
352 | .close = snd_virmidi_output_close, | |
353 | .trigger = snd_virmidi_output_trigger, | |
354 | }; | |
355 | ||
356 | /* | |
357 | * create a sequencer client and a port | |
358 | */ | |
c7e0b5bf | 359 | static int snd_virmidi_dev_attach_seq(struct snd_virmidi_dev *rdev) |
1da177e4 LT |
360 | { |
361 | int client; | |
c7e0b5bf | 362 | struct snd_seq_port_callback pcallbacks; |
c7e0b5bf | 363 | struct snd_seq_port_info *pinfo; |
1da177e4 LT |
364 | int err; |
365 | ||
366 | if (rdev->client >= 0) | |
367 | return 0; | |
368 | ||
1da177e4 | 369 | pinfo = kmalloc(sizeof(*pinfo), GFP_KERNEL); |
7b6d9245 | 370 | if (!pinfo) { |
1da177e4 LT |
371 | err = -ENOMEM; |
372 | goto __error; | |
373 | } | |
374 | ||
7b6d9245 CL |
375 | client = snd_seq_create_kernel_client(rdev->card, rdev->device, |
376 | "%s %d-%d", rdev->rmidi->name, | |
377 | rdev->card->number, | |
378 | rdev->device); | |
1da177e4 LT |
379 | if (client < 0) { |
380 | err = client; | |
381 | goto __error; | |
382 | } | |
383 | rdev->client = client; | |
384 | ||
1da177e4 LT |
385 | /* create a port */ |
386 | memset(pinfo, 0, sizeof(*pinfo)); | |
387 | pinfo->addr.client = client; | |
388 | sprintf(pinfo->name, "VirMIDI %d-%d", rdev->card->number, rdev->device); | |
389 | /* set all capabilities */ | |
390 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_WRITE | SNDRV_SEQ_PORT_CAP_SYNC_WRITE | SNDRV_SEQ_PORT_CAP_SUBS_WRITE; | |
391 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_READ | SNDRV_SEQ_PORT_CAP_SYNC_READ | SNDRV_SEQ_PORT_CAP_SUBS_READ; | |
392 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_DUPLEX; | |
393 | pinfo->type = SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC; | |
394 | pinfo->midi_channels = 16; | |
395 | memset(&pcallbacks, 0, sizeof(pcallbacks)); | |
396 | pcallbacks.owner = THIS_MODULE; | |
397 | pcallbacks.private_data = rdev; | |
398 | pcallbacks.subscribe = snd_virmidi_subscribe; | |
399 | pcallbacks.unsubscribe = snd_virmidi_unsubscribe; | |
400 | pcallbacks.use = snd_virmidi_use; | |
401 | pcallbacks.unuse = snd_virmidi_unuse; | |
402 | pcallbacks.event_input = snd_virmidi_event_input; | |
403 | pinfo->kernel = &pcallbacks; | |
0aa0d387 | 404 | err = snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, pinfo); |
1da177e4 LT |
405 | if (err < 0) { |
406 | snd_seq_delete_kernel_client(client); | |
407 | rdev->client = -1; | |
408 | goto __error; | |
409 | } | |
410 | ||
411 | rdev->port = pinfo->addr.port; | |
412 | err = 0; /* success */ | |
413 | ||
414 | __error: | |
1da177e4 LT |
415 | kfree(pinfo); |
416 | return err; | |
417 | } | |
418 | ||
419 | ||
420 | /* | |
421 | * release the sequencer client | |
422 | */ | |
c7e0b5bf | 423 | static void snd_virmidi_dev_detach_seq(struct snd_virmidi_dev *rdev) |
1da177e4 LT |
424 | { |
425 | if (rdev->client >= 0) { | |
426 | snd_seq_delete_kernel_client(rdev->client); | |
427 | rdev->client = -1; | |
428 | } | |
429 | } | |
430 | ||
431 | /* | |
432 | * register the device | |
433 | */ | |
c7e0b5bf | 434 | static int snd_virmidi_dev_register(struct snd_rawmidi *rmidi) |
1da177e4 | 435 | { |
c7e0b5bf | 436 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
1da177e4 LT |
437 | int err; |
438 | ||
439 | switch (rdev->seq_mode) { | |
440 | case SNDRV_VIRMIDI_SEQ_DISPATCH: | |
441 | err = snd_virmidi_dev_attach_seq(rdev); | |
442 | if (err < 0) | |
443 | return err; | |
444 | break; | |
445 | case SNDRV_VIRMIDI_SEQ_ATTACH: | |
446 | if (rdev->client == 0) | |
447 | return -EINVAL; | |
448 | /* should check presence of port more strictly.. */ | |
449 | break; | |
450 | default: | |
451 | snd_printk(KERN_ERR "seq_mode is not set: %d\n", rdev->seq_mode); | |
452 | return -EINVAL; | |
453 | } | |
454 | return 0; | |
455 | } | |
456 | ||
457 | ||
458 | /* | |
459 | * unregister the device | |
460 | */ | |
c7e0b5bf | 461 | static int snd_virmidi_dev_unregister(struct snd_rawmidi *rmidi) |
1da177e4 | 462 | { |
c7e0b5bf | 463 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
1da177e4 LT |
464 | |
465 | if (rdev->seq_mode == SNDRV_VIRMIDI_SEQ_DISPATCH) | |
466 | snd_virmidi_dev_detach_seq(rdev); | |
467 | return 0; | |
468 | } | |
469 | ||
470 | /* | |
471 | * | |
472 | */ | |
c7e0b5bf | 473 | static struct snd_rawmidi_global_ops snd_virmidi_global_ops = { |
1da177e4 LT |
474 | .dev_register = snd_virmidi_dev_register, |
475 | .dev_unregister = snd_virmidi_dev_unregister, | |
476 | }; | |
477 | ||
478 | /* | |
479 | * free device | |
480 | */ | |
c7e0b5bf | 481 | static void snd_virmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 482 | { |
c7e0b5bf | 483 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
1da177e4 LT |
484 | kfree(rdev); |
485 | } | |
486 | ||
487 | /* | |
488 | * create a new device | |
489 | * | |
490 | */ | |
491 | /* exported */ | |
c7e0b5bf | 492 | int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi) |
1da177e4 | 493 | { |
c7e0b5bf TI |
494 | struct snd_rawmidi *rmidi; |
495 | struct snd_virmidi_dev *rdev; | |
1da177e4 LT |
496 | int err; |
497 | ||
498 | *rrmidi = NULL; | |
499 | if ((err = snd_rawmidi_new(card, "VirMidi", device, | |
500 | 16, /* may be configurable */ | |
501 | 16, /* may be configurable */ | |
502 | &rmidi)) < 0) | |
503 | return err; | |
504 | strcpy(rmidi->name, rmidi->id); | |
ecca82b4 | 505 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
1da177e4 LT |
506 | if (rdev == NULL) { |
507 | snd_device_free(card, rmidi); | |
508 | return -ENOMEM; | |
509 | } | |
510 | rdev->card = card; | |
511 | rdev->rmidi = rmidi; | |
512 | rdev->device = device; | |
513 | rdev->client = -1; | |
514 | rwlock_init(&rdev->filelist_lock); | |
515 | INIT_LIST_HEAD(&rdev->filelist); | |
516 | rdev->seq_mode = SNDRV_VIRMIDI_SEQ_DISPATCH; | |
517 | rmidi->private_data = rdev; | |
518 | rmidi->private_free = snd_virmidi_free; | |
519 | rmidi->ops = &snd_virmidi_global_ops; | |
520 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_virmidi_input_ops); | |
521 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_virmidi_output_ops); | |
522 | rmidi->info_flags = SNDRV_RAWMIDI_INFO_INPUT | | |
523 | SNDRV_RAWMIDI_INFO_OUTPUT | | |
524 | SNDRV_RAWMIDI_INFO_DUPLEX; | |
525 | *rrmidi = rmidi; | |
526 | return 0; | |
527 | } | |
528 | ||
529 | /* | |
530 | * ENTRY functions | |
531 | */ | |
532 | ||
533 | static int __init alsa_virmidi_init(void) | |
534 | { | |
535 | return 0; | |
536 | } | |
537 | ||
538 | static void __exit alsa_virmidi_exit(void) | |
539 | { | |
540 | } | |
541 | ||
542 | module_init(alsa_virmidi_init) | |
543 | module_exit(alsa_virmidi_exit) | |
544 | ||
545 | EXPORT_SYMBOL(snd_virmidi_new); |