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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 | ||
1da177e4 LT |
38 | #include <linux/init.h> |
39 | #include <linux/wait.h> | |
da155d5b | 40 | #include <linux/module.h> |
1da177e4 LT |
41 | #include <linux/slab.h> |
42 | #include <sound/core.h> | |
43 | #include <sound/rawmidi.h> | |
44 | #include <sound/info.h> | |
45 | #include <sound/control.h> | |
46 | #include <sound/minors.h> | |
47 | #include <sound/seq_kernel.h> | |
48 | #include <sound/seq_midi_event.h> | |
49 | #include <sound/seq_virmidi.h> | |
50 | ||
51 | MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); | |
52 | MODULE_DESCRIPTION("Virtual Raw MIDI client on Sequencer"); | |
53 | MODULE_LICENSE("GPL"); | |
54 | ||
55 | /* | |
56 | * initialize an event record | |
57 | */ | |
c7e0b5bf TI |
58 | static void snd_virmidi_init_event(struct snd_virmidi *vmidi, |
59 | struct snd_seq_event *ev) | |
1da177e4 LT |
60 | { |
61 | memset(ev, 0, sizeof(*ev)); | |
62 | ev->source.port = vmidi->port; | |
63 | switch (vmidi->seq_mode) { | |
64 | case SNDRV_VIRMIDI_SEQ_DISPATCH: | |
65 | ev->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; | |
66 | break; | |
67 | case SNDRV_VIRMIDI_SEQ_ATTACH: | |
68 | /* FIXME: source and destination are same - not good.. */ | |
69 | ev->dest.client = vmidi->client; | |
70 | ev->dest.port = vmidi->port; | |
71 | break; | |
72 | } | |
73 | ev->type = SNDRV_SEQ_EVENT_NONE; | |
74 | } | |
75 | ||
76 | /* | |
77 | * decode input event and put to read buffer of each opened file | |
78 | */ | |
c7e0b5bf TI |
79 | static int snd_virmidi_dev_receive_event(struct snd_virmidi_dev *rdev, |
80 | struct snd_seq_event *ev) | |
1da177e4 | 81 | { |
c7e0b5bf | 82 | struct snd_virmidi *vmidi; |
1da177e4 LT |
83 | unsigned char msg[4]; |
84 | int len; | |
85 | ||
86 | read_lock(&rdev->filelist_lock); | |
9244b2c3 | 87 | list_for_each_entry(vmidi, &rdev->filelist, list) { |
1da177e4 LT |
88 | if (!vmidi->trigger) |
89 | continue; | |
90 | if (ev->type == SNDRV_SEQ_EVENT_SYSEX) { | |
91 | if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARIABLE) | |
92 | continue; | |
93 | snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)snd_rawmidi_receive, vmidi->substream); | |
94 | } else { | |
95 | len = snd_midi_event_decode(vmidi->parser, msg, sizeof(msg), ev); | |
96 | if (len > 0) | |
97 | snd_rawmidi_receive(vmidi->substream, msg, len); | |
98 | } | |
99 | } | |
100 | read_unlock(&rdev->filelist_lock); | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | /* | |
106 | * receive an event from the remote virmidi port | |
107 | * | |
108 | * for rawmidi inputs, you can call this function from the event | |
109 | * handler of a remote port which is attached to the virmidi via | |
110 | * SNDRV_VIRMIDI_SEQ_ATTACH. | |
111 | */ | |
123992f7 | 112 | #if 0 |
c7e0b5bf | 113 | int snd_virmidi_receive(struct snd_rawmidi *rmidi, struct snd_seq_event *ev) |
1da177e4 | 114 | { |
c7e0b5bf | 115 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
116 | |
117 | rdev = rmidi->private_data; | |
118 | return snd_virmidi_dev_receive_event(rdev, ev); | |
119 | } | |
123992f7 | 120 | #endif /* 0 */ |
1da177e4 LT |
121 | |
122 | /* | |
123 | * event handler of virmidi port | |
124 | */ | |
c7e0b5bf | 125 | static int snd_virmidi_event_input(struct snd_seq_event *ev, int direct, |
1da177e4 LT |
126 | void *private_data, int atomic, int hop) |
127 | { | |
c7e0b5bf | 128 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
129 | |
130 | rdev = private_data; | |
131 | if (!(rdev->flags & SNDRV_VIRMIDI_USE)) | |
132 | return 0; /* ignored */ | |
133 | return snd_virmidi_dev_receive_event(rdev, ev); | |
134 | } | |
135 | ||
136 | /* | |
137 | * trigger rawmidi stream for input | |
138 | */ | |
c7e0b5bf | 139 | static void snd_virmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 140 | { |
c7e0b5bf | 141 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
1da177e4 LT |
142 | |
143 | if (up) { | |
144 | vmidi->trigger = 1; | |
145 | } else { | |
146 | vmidi->trigger = 0; | |
147 | } | |
148 | } | |
149 | ||
150 | /* | |
151 | * trigger rawmidi stream for output | |
152 | */ | |
c7e0b5bf | 153 | static void snd_virmidi_output_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 154 | { |
c7e0b5bf | 155 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
1da177e4 LT |
156 | int count, res; |
157 | unsigned char buf[32], *pbuf; | |
158 | ||
159 | if (up) { | |
160 | vmidi->trigger = 1; | |
161 | if (vmidi->seq_mode == SNDRV_VIRMIDI_SEQ_DISPATCH && | |
162 | !(vmidi->rdev->flags & SNDRV_VIRMIDI_SUBSCRIBE)) { | |
163 | snd_rawmidi_transmit_ack(substream, substream->runtime->buffer_size - substream->runtime->avail); | |
164 | return; /* ignored */ | |
165 | } | |
166 | if (vmidi->event.type != SNDRV_SEQ_EVENT_NONE) { | |
62c5549e | 167 | if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0) |
1da177e4 LT |
168 | return; |
169 | vmidi->event.type = SNDRV_SEQ_EVENT_NONE; | |
170 | } | |
171 | while (1) { | |
172 | count = snd_rawmidi_transmit_peek(substream, buf, sizeof(buf)); | |
173 | if (count <= 0) | |
174 | break; | |
175 | pbuf = buf; | |
176 | while (count > 0) { | |
177 | res = snd_midi_event_encode(vmidi->parser, pbuf, count, &vmidi->event); | |
178 | if (res < 0) { | |
179 | snd_midi_event_reset_encode(vmidi->parser); | |
180 | continue; | |
181 | } | |
182 | snd_rawmidi_transmit_ack(substream, res); | |
183 | pbuf += res; | |
184 | count -= res; | |
185 | if (vmidi->event.type != SNDRV_SEQ_EVENT_NONE) { | |
62c5549e | 186 | if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0) |
1da177e4 LT |
187 | return; |
188 | vmidi->event.type = SNDRV_SEQ_EVENT_NONE; | |
189 | } | |
190 | } | |
191 | } | |
192 | } else { | |
193 | vmidi->trigger = 0; | |
194 | } | |
195 | } | |
196 | ||
197 | /* | |
198 | * open rawmidi handle for input | |
199 | */ | |
c7e0b5bf | 200 | static int snd_virmidi_input_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 201 | { |
c7e0b5bf TI |
202 | struct snd_virmidi_dev *rdev = substream->rmidi->private_data; |
203 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
204 | struct snd_virmidi *vmidi; | |
1da177e4 LT |
205 | unsigned long flags; |
206 | ||
ecca82b4 | 207 | vmidi = kzalloc(sizeof(*vmidi), GFP_KERNEL); |
1da177e4 LT |
208 | if (vmidi == NULL) |
209 | return -ENOMEM; | |
210 | vmidi->substream = substream; | |
211 | if (snd_midi_event_new(0, &vmidi->parser) < 0) { | |
212 | kfree(vmidi); | |
213 | return -ENOMEM; | |
214 | } | |
215 | vmidi->seq_mode = rdev->seq_mode; | |
216 | vmidi->client = rdev->client; | |
217 | vmidi->port = rdev->port; | |
218 | runtime->private_data = vmidi; | |
219 | write_lock_irqsave(&rdev->filelist_lock, flags); | |
220 | list_add_tail(&vmidi->list, &rdev->filelist); | |
221 | write_unlock_irqrestore(&rdev->filelist_lock, flags); | |
222 | vmidi->rdev = rdev; | |
223 | return 0; | |
224 | } | |
225 | ||
226 | /* | |
227 | * open rawmidi handle for output | |
228 | */ | |
c7e0b5bf | 229 | static int snd_virmidi_output_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 230 | { |
c7e0b5bf TI |
231 | struct snd_virmidi_dev *rdev = substream->rmidi->private_data; |
232 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
233 | struct snd_virmidi *vmidi; | |
1da177e4 | 234 | |
ecca82b4 | 235 | vmidi = kzalloc(sizeof(*vmidi), GFP_KERNEL); |
1da177e4 LT |
236 | if (vmidi == NULL) |
237 | return -ENOMEM; | |
238 | vmidi->substream = substream; | |
239 | if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &vmidi->parser) < 0) { | |
240 | kfree(vmidi); | |
241 | return -ENOMEM; | |
242 | } | |
243 | vmidi->seq_mode = rdev->seq_mode; | |
244 | vmidi->client = rdev->client; | |
245 | vmidi->port = rdev->port; | |
246 | snd_virmidi_init_event(vmidi, &vmidi->event); | |
247 | vmidi->rdev = rdev; | |
248 | runtime->private_data = vmidi; | |
249 | return 0; | |
250 | } | |
251 | ||
252 | /* | |
253 | * close rawmidi handle for input | |
254 | */ | |
c7e0b5bf | 255 | static int snd_virmidi_input_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 256 | { |
c7e0b5bf | 257 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
1da177e4 LT |
258 | snd_midi_event_free(vmidi->parser); |
259 | list_del(&vmidi->list); | |
260 | substream->runtime->private_data = NULL; | |
261 | kfree(vmidi); | |
262 | return 0; | |
263 | } | |
264 | ||
265 | /* | |
266 | * close rawmidi handle for output | |
267 | */ | |
c7e0b5bf | 268 | static int snd_virmidi_output_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 269 | { |
c7e0b5bf | 270 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
1da177e4 LT |
271 | snd_midi_event_free(vmidi->parser); |
272 | substream->runtime->private_data = NULL; | |
273 | kfree(vmidi); | |
274 | return 0; | |
275 | } | |
276 | ||
277 | /* | |
278 | * subscribe callback - allow output to rawmidi device | |
279 | */ | |
c7e0b5bf TI |
280 | static int snd_virmidi_subscribe(void *private_data, |
281 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 282 | { |
c7e0b5bf | 283 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
284 | |
285 | rdev = private_data; | |
286 | if (!try_module_get(rdev->card->module)) | |
287 | return -EFAULT; | |
288 | rdev->flags |= SNDRV_VIRMIDI_SUBSCRIBE; | |
289 | return 0; | |
290 | } | |
291 | ||
292 | /* | |
293 | * unsubscribe callback - disallow output to rawmidi device | |
294 | */ | |
c7e0b5bf TI |
295 | static int snd_virmidi_unsubscribe(void *private_data, |
296 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 297 | { |
c7e0b5bf | 298 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
299 | |
300 | rdev = private_data; | |
301 | rdev->flags &= ~SNDRV_VIRMIDI_SUBSCRIBE; | |
302 | module_put(rdev->card->module); | |
303 | return 0; | |
304 | } | |
305 | ||
306 | ||
307 | /* | |
308 | * use callback - allow input to rawmidi device | |
309 | */ | |
c7e0b5bf TI |
310 | static int snd_virmidi_use(void *private_data, |
311 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 312 | { |
c7e0b5bf | 313 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
314 | |
315 | rdev = private_data; | |
316 | if (!try_module_get(rdev->card->module)) | |
317 | return -EFAULT; | |
318 | rdev->flags |= SNDRV_VIRMIDI_USE; | |
319 | return 0; | |
320 | } | |
321 | ||
322 | /* | |
323 | * unuse callback - disallow input to rawmidi device | |
324 | */ | |
c7e0b5bf TI |
325 | static int snd_virmidi_unuse(void *private_data, |
326 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 327 | { |
c7e0b5bf | 328 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
329 | |
330 | rdev = private_data; | |
331 | rdev->flags &= ~SNDRV_VIRMIDI_USE; | |
332 | module_put(rdev->card->module); | |
333 | return 0; | |
334 | } | |
335 | ||
336 | ||
337 | /* | |
338 | * Register functions | |
339 | */ | |
340 | ||
c7e0b5bf | 341 | static struct snd_rawmidi_ops snd_virmidi_input_ops = { |
1da177e4 LT |
342 | .open = snd_virmidi_input_open, |
343 | .close = snd_virmidi_input_close, | |
344 | .trigger = snd_virmidi_input_trigger, | |
345 | }; | |
346 | ||
c7e0b5bf | 347 | static struct snd_rawmidi_ops snd_virmidi_output_ops = { |
1da177e4 LT |
348 | .open = snd_virmidi_output_open, |
349 | .close = snd_virmidi_output_close, | |
350 | .trigger = snd_virmidi_output_trigger, | |
351 | }; | |
352 | ||
353 | /* | |
354 | * create a sequencer client and a port | |
355 | */ | |
c7e0b5bf | 356 | static int snd_virmidi_dev_attach_seq(struct snd_virmidi_dev *rdev) |
1da177e4 LT |
357 | { |
358 | int client; | |
c7e0b5bf | 359 | struct snd_seq_port_callback pcallbacks; |
c7e0b5bf | 360 | struct snd_seq_port_info *pinfo; |
1da177e4 LT |
361 | int err; |
362 | ||
363 | if (rdev->client >= 0) | |
364 | return 0; | |
365 | ||
dd00cc48 | 366 | pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL); |
7b6d9245 | 367 | if (!pinfo) { |
1da177e4 LT |
368 | err = -ENOMEM; |
369 | goto __error; | |
370 | } | |
371 | ||
7b6d9245 CL |
372 | client = snd_seq_create_kernel_client(rdev->card, rdev->device, |
373 | "%s %d-%d", rdev->rmidi->name, | |
374 | rdev->card->number, | |
375 | rdev->device); | |
1da177e4 LT |
376 | if (client < 0) { |
377 | err = client; | |
378 | goto __error; | |
379 | } | |
380 | rdev->client = client; | |
381 | ||
1da177e4 | 382 | /* create a port */ |
1da177e4 LT |
383 | pinfo->addr.client = client; |
384 | sprintf(pinfo->name, "VirMIDI %d-%d", rdev->card->number, rdev->device); | |
385 | /* set all capabilities */ | |
386 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_WRITE | SNDRV_SEQ_PORT_CAP_SYNC_WRITE | SNDRV_SEQ_PORT_CAP_SUBS_WRITE; | |
387 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_READ | SNDRV_SEQ_PORT_CAP_SYNC_READ | SNDRV_SEQ_PORT_CAP_SUBS_READ; | |
388 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_DUPLEX; | |
450047a7 CL |
389 | pinfo->type = SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
390 | | SNDRV_SEQ_PORT_TYPE_SOFTWARE | |
391 | | SNDRV_SEQ_PORT_TYPE_PORT; | |
1da177e4 LT |
392 | pinfo->midi_channels = 16; |
393 | memset(&pcallbacks, 0, sizeof(pcallbacks)); | |
394 | pcallbacks.owner = THIS_MODULE; | |
395 | pcallbacks.private_data = rdev; | |
396 | pcallbacks.subscribe = snd_virmidi_subscribe; | |
397 | pcallbacks.unsubscribe = snd_virmidi_unsubscribe; | |
398 | pcallbacks.use = snd_virmidi_use; | |
399 | pcallbacks.unuse = snd_virmidi_unuse; | |
400 | pcallbacks.event_input = snd_virmidi_event_input; | |
401 | pinfo->kernel = &pcallbacks; | |
0aa0d387 | 402 | err = snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, pinfo); |
1da177e4 LT |
403 | if (err < 0) { |
404 | snd_seq_delete_kernel_client(client); | |
405 | rdev->client = -1; | |
406 | goto __error; | |
407 | } | |
408 | ||
409 | rdev->port = pinfo->addr.port; | |
410 | err = 0; /* success */ | |
411 | ||
412 | __error: | |
1da177e4 LT |
413 | kfree(pinfo); |
414 | return err; | |
415 | } | |
416 | ||
417 | ||
418 | /* | |
419 | * release the sequencer client | |
420 | */ | |
c7e0b5bf | 421 | static void snd_virmidi_dev_detach_seq(struct snd_virmidi_dev *rdev) |
1da177e4 LT |
422 | { |
423 | if (rdev->client >= 0) { | |
424 | snd_seq_delete_kernel_client(rdev->client); | |
425 | rdev->client = -1; | |
426 | } | |
427 | } | |
428 | ||
429 | /* | |
430 | * register the device | |
431 | */ | |
c7e0b5bf | 432 | static int snd_virmidi_dev_register(struct snd_rawmidi *rmidi) |
1da177e4 | 433 | { |
c7e0b5bf | 434 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
1da177e4 LT |
435 | int err; |
436 | ||
437 | switch (rdev->seq_mode) { | |
438 | case SNDRV_VIRMIDI_SEQ_DISPATCH: | |
439 | err = snd_virmidi_dev_attach_seq(rdev); | |
440 | if (err < 0) | |
441 | return err; | |
442 | break; | |
443 | case SNDRV_VIRMIDI_SEQ_ATTACH: | |
444 | if (rdev->client == 0) | |
445 | return -EINVAL; | |
446 | /* should check presence of port more strictly.. */ | |
447 | break; | |
448 | default: | |
04cc79a0 | 449 | pr_err("ALSA: seq_virmidi: seq_mode is not set: %d\n", rdev->seq_mode); |
1da177e4 LT |
450 | return -EINVAL; |
451 | } | |
452 | return 0; | |
453 | } | |
454 | ||
455 | ||
456 | /* | |
457 | * unregister the device | |
458 | */ | |
c7e0b5bf | 459 | static int snd_virmidi_dev_unregister(struct snd_rawmidi *rmidi) |
1da177e4 | 460 | { |
c7e0b5bf | 461 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
1da177e4 LT |
462 | |
463 | if (rdev->seq_mode == SNDRV_VIRMIDI_SEQ_DISPATCH) | |
464 | snd_virmidi_dev_detach_seq(rdev); | |
465 | return 0; | |
466 | } | |
467 | ||
468 | /* | |
469 | * | |
470 | */ | |
efdbe3c3 | 471 | static const struct snd_rawmidi_global_ops snd_virmidi_global_ops = { |
1da177e4 LT |
472 | .dev_register = snd_virmidi_dev_register, |
473 | .dev_unregister = snd_virmidi_dev_unregister, | |
474 | }; | |
475 | ||
476 | /* | |
477 | * free device | |
478 | */ | |
c7e0b5bf | 479 | static void snd_virmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 480 | { |
c7e0b5bf | 481 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
1da177e4 LT |
482 | kfree(rdev); |
483 | } | |
484 | ||
485 | /* | |
486 | * create a new device | |
487 | * | |
488 | */ | |
489 | /* exported */ | |
c7e0b5bf | 490 | int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi) |
1da177e4 | 491 | { |
c7e0b5bf TI |
492 | struct snd_rawmidi *rmidi; |
493 | struct snd_virmidi_dev *rdev; | |
1da177e4 LT |
494 | int err; |
495 | ||
496 | *rrmidi = NULL; | |
497 | if ((err = snd_rawmidi_new(card, "VirMidi", device, | |
498 | 16, /* may be configurable */ | |
499 | 16, /* may be configurable */ | |
500 | &rmidi)) < 0) | |
501 | return err; | |
502 | strcpy(rmidi->name, rmidi->id); | |
ecca82b4 | 503 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
1da177e4 LT |
504 | if (rdev == NULL) { |
505 | snd_device_free(card, rmidi); | |
506 | return -ENOMEM; | |
507 | } | |
508 | rdev->card = card; | |
509 | rdev->rmidi = rmidi; | |
510 | rdev->device = device; | |
511 | rdev->client = -1; | |
512 | rwlock_init(&rdev->filelist_lock); | |
513 | INIT_LIST_HEAD(&rdev->filelist); | |
514 | rdev->seq_mode = SNDRV_VIRMIDI_SEQ_DISPATCH; | |
515 | rmidi->private_data = rdev; | |
516 | rmidi->private_free = snd_virmidi_free; | |
517 | rmidi->ops = &snd_virmidi_global_ops; | |
518 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_virmidi_input_ops); | |
519 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_virmidi_output_ops); | |
520 | rmidi->info_flags = SNDRV_RAWMIDI_INFO_INPUT | | |
521 | SNDRV_RAWMIDI_INFO_OUTPUT | | |
522 | SNDRV_RAWMIDI_INFO_DUPLEX; | |
523 | *rrmidi = rmidi; | |
524 | return 0; | |
525 | } | |
526 | ||
527 | /* | |
528 | * ENTRY functions | |
529 | */ | |
530 | ||
531 | static int __init alsa_virmidi_init(void) | |
532 | { | |
533 | return 0; | |
534 | } | |
535 | ||
536 | static void __exit alsa_virmidi_exit(void) | |
537 | { | |
538 | } | |
539 | ||
540 | module_init(alsa_virmidi_init) | |
541 | module_exit(alsa_virmidi_exit) | |
542 | ||
543 | EXPORT_SYMBOL(snd_virmidi_new); |