Commit | Line | Data |
---|---|---|
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; | |
06ab3003 | 158 | unsigned long flags; |
1da177e4 LT |
159 | |
160 | if (up) { | |
161 | vmidi->trigger = 1; | |
162 | if (vmidi->seq_mode == SNDRV_VIRMIDI_SEQ_DISPATCH && | |
163 | !(vmidi->rdev->flags & SNDRV_VIRMIDI_SUBSCRIBE)) { | |
06ab3003 TI |
164 | while (snd_rawmidi_transmit(substream, buf, |
165 | sizeof(buf)) > 0) { | |
166 | /* ignored */ | |
167 | } | |
168 | return; | |
1da177e4 LT |
169 | } |
170 | if (vmidi->event.type != SNDRV_SEQ_EVENT_NONE) { | |
62c5549e | 171 | if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0) |
1da177e4 LT |
172 | return; |
173 | vmidi->event.type = SNDRV_SEQ_EVENT_NONE; | |
174 | } | |
06ab3003 | 175 | spin_lock_irqsave(&substream->runtime->lock, flags); |
1da177e4 | 176 | while (1) { |
06ab3003 | 177 | count = __snd_rawmidi_transmit_peek(substream, buf, sizeof(buf)); |
1da177e4 LT |
178 | if (count <= 0) |
179 | break; | |
180 | pbuf = buf; | |
181 | while (count > 0) { | |
182 | res = snd_midi_event_encode(vmidi->parser, pbuf, count, &vmidi->event); | |
183 | if (res < 0) { | |
184 | snd_midi_event_reset_encode(vmidi->parser); | |
185 | continue; | |
186 | } | |
06ab3003 | 187 | __snd_rawmidi_transmit_ack(substream, res); |
1da177e4 LT |
188 | pbuf += res; |
189 | count -= res; | |
190 | if (vmidi->event.type != SNDRV_SEQ_EVENT_NONE) { | |
62c5549e | 191 | if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0) |
06ab3003 | 192 | goto out; |
1da177e4 LT |
193 | vmidi->event.type = SNDRV_SEQ_EVENT_NONE; |
194 | } | |
195 | } | |
196 | } | |
06ab3003 TI |
197 | out: |
198 | spin_unlock_irqrestore(&substream->runtime->lock, flags); | |
1da177e4 LT |
199 | } else { |
200 | vmidi->trigger = 0; | |
201 | } | |
202 | } | |
203 | ||
204 | /* | |
205 | * open rawmidi handle for input | |
206 | */ | |
c7e0b5bf | 207 | static int snd_virmidi_input_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 208 | { |
c7e0b5bf TI |
209 | struct snd_virmidi_dev *rdev = substream->rmidi->private_data; |
210 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
211 | struct snd_virmidi *vmidi; | |
1da177e4 LT |
212 | unsigned long flags; |
213 | ||
ecca82b4 | 214 | vmidi = kzalloc(sizeof(*vmidi), GFP_KERNEL); |
1da177e4 LT |
215 | if (vmidi == NULL) |
216 | return -ENOMEM; | |
217 | vmidi->substream = substream; | |
218 | if (snd_midi_event_new(0, &vmidi->parser) < 0) { | |
219 | kfree(vmidi); | |
220 | return -ENOMEM; | |
221 | } | |
222 | vmidi->seq_mode = rdev->seq_mode; | |
223 | vmidi->client = rdev->client; | |
224 | vmidi->port = rdev->port; | |
225 | runtime->private_data = vmidi; | |
226 | write_lock_irqsave(&rdev->filelist_lock, flags); | |
227 | list_add_tail(&vmidi->list, &rdev->filelist); | |
228 | write_unlock_irqrestore(&rdev->filelist_lock, flags); | |
229 | vmidi->rdev = rdev; | |
230 | return 0; | |
231 | } | |
232 | ||
233 | /* | |
234 | * open rawmidi handle for output | |
235 | */ | |
c7e0b5bf | 236 | static int snd_virmidi_output_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 237 | { |
c7e0b5bf TI |
238 | struct snd_virmidi_dev *rdev = substream->rmidi->private_data; |
239 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
240 | struct snd_virmidi *vmidi; | |
1da177e4 | 241 | |
ecca82b4 | 242 | vmidi = kzalloc(sizeof(*vmidi), GFP_KERNEL); |
1da177e4 LT |
243 | if (vmidi == NULL) |
244 | return -ENOMEM; | |
245 | vmidi->substream = substream; | |
246 | if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &vmidi->parser) < 0) { | |
247 | kfree(vmidi); | |
248 | return -ENOMEM; | |
249 | } | |
250 | vmidi->seq_mode = rdev->seq_mode; | |
251 | vmidi->client = rdev->client; | |
252 | vmidi->port = rdev->port; | |
253 | snd_virmidi_init_event(vmidi, &vmidi->event); | |
254 | vmidi->rdev = rdev; | |
255 | runtime->private_data = vmidi; | |
256 | return 0; | |
257 | } | |
258 | ||
259 | /* | |
260 | * close rawmidi handle for input | |
261 | */ | |
c7e0b5bf | 262 | static int snd_virmidi_input_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 263 | { |
2d1b5c08 | 264 | struct snd_virmidi_dev *rdev = substream->rmidi->private_data; |
c7e0b5bf | 265 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
2d1b5c08 TI |
266 | |
267 | write_lock_irq(&rdev->filelist_lock); | |
1da177e4 | 268 | list_del(&vmidi->list); |
2d1b5c08 TI |
269 | write_unlock_irq(&rdev->filelist_lock); |
270 | snd_midi_event_free(vmidi->parser); | |
1da177e4 LT |
271 | substream->runtime->private_data = NULL; |
272 | kfree(vmidi); | |
273 | return 0; | |
274 | } | |
275 | ||
276 | /* | |
277 | * close rawmidi handle for output | |
278 | */ | |
c7e0b5bf | 279 | static int snd_virmidi_output_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 280 | { |
c7e0b5bf | 281 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
1da177e4 LT |
282 | snd_midi_event_free(vmidi->parser); |
283 | substream->runtime->private_data = NULL; | |
284 | kfree(vmidi); | |
285 | return 0; | |
286 | } | |
287 | ||
288 | /* | |
289 | * subscribe callback - allow output to rawmidi device | |
290 | */ | |
c7e0b5bf TI |
291 | static int snd_virmidi_subscribe(void *private_data, |
292 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 293 | { |
c7e0b5bf | 294 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
295 | |
296 | rdev = private_data; | |
297 | if (!try_module_get(rdev->card->module)) | |
298 | return -EFAULT; | |
299 | rdev->flags |= SNDRV_VIRMIDI_SUBSCRIBE; | |
300 | return 0; | |
301 | } | |
302 | ||
303 | /* | |
304 | * unsubscribe callback - disallow output to rawmidi device | |
305 | */ | |
c7e0b5bf TI |
306 | static int snd_virmidi_unsubscribe(void *private_data, |
307 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 308 | { |
c7e0b5bf | 309 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
310 | |
311 | rdev = private_data; | |
312 | rdev->flags &= ~SNDRV_VIRMIDI_SUBSCRIBE; | |
313 | module_put(rdev->card->module); | |
314 | return 0; | |
315 | } | |
316 | ||
317 | ||
318 | /* | |
319 | * use callback - allow input to rawmidi device | |
320 | */ | |
c7e0b5bf TI |
321 | static int snd_virmidi_use(void *private_data, |
322 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 323 | { |
c7e0b5bf | 324 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
325 | |
326 | rdev = private_data; | |
327 | if (!try_module_get(rdev->card->module)) | |
328 | return -EFAULT; | |
329 | rdev->flags |= SNDRV_VIRMIDI_USE; | |
330 | return 0; | |
331 | } | |
332 | ||
333 | /* | |
334 | * unuse callback - disallow input to rawmidi device | |
335 | */ | |
c7e0b5bf TI |
336 | static int snd_virmidi_unuse(void *private_data, |
337 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 338 | { |
c7e0b5bf | 339 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
340 | |
341 | rdev = private_data; | |
342 | rdev->flags &= ~SNDRV_VIRMIDI_USE; | |
343 | module_put(rdev->card->module); | |
344 | return 0; | |
345 | } | |
346 | ||
347 | ||
348 | /* | |
349 | * Register functions | |
350 | */ | |
351 | ||
c7e0b5bf | 352 | static struct snd_rawmidi_ops snd_virmidi_input_ops = { |
1da177e4 LT |
353 | .open = snd_virmidi_input_open, |
354 | .close = snd_virmidi_input_close, | |
355 | .trigger = snd_virmidi_input_trigger, | |
356 | }; | |
357 | ||
c7e0b5bf | 358 | static struct snd_rawmidi_ops snd_virmidi_output_ops = { |
1da177e4 LT |
359 | .open = snd_virmidi_output_open, |
360 | .close = snd_virmidi_output_close, | |
361 | .trigger = snd_virmidi_output_trigger, | |
362 | }; | |
363 | ||
364 | /* | |
365 | * create a sequencer client and a port | |
366 | */ | |
c7e0b5bf | 367 | static int snd_virmidi_dev_attach_seq(struct snd_virmidi_dev *rdev) |
1da177e4 LT |
368 | { |
369 | int client; | |
c7e0b5bf | 370 | struct snd_seq_port_callback pcallbacks; |
c7e0b5bf | 371 | struct snd_seq_port_info *pinfo; |
1da177e4 LT |
372 | int err; |
373 | ||
374 | if (rdev->client >= 0) | |
375 | return 0; | |
376 | ||
dd00cc48 | 377 | pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL); |
7b6d9245 | 378 | if (!pinfo) { |
1da177e4 LT |
379 | err = -ENOMEM; |
380 | goto __error; | |
381 | } | |
382 | ||
7b6d9245 CL |
383 | client = snd_seq_create_kernel_client(rdev->card, rdev->device, |
384 | "%s %d-%d", rdev->rmidi->name, | |
385 | rdev->card->number, | |
386 | rdev->device); | |
1da177e4 LT |
387 | if (client < 0) { |
388 | err = client; | |
389 | goto __error; | |
390 | } | |
391 | rdev->client = client; | |
392 | ||
1da177e4 | 393 | /* create a port */ |
1da177e4 LT |
394 | pinfo->addr.client = client; |
395 | sprintf(pinfo->name, "VirMIDI %d-%d", rdev->card->number, rdev->device); | |
396 | /* set all capabilities */ | |
397 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_WRITE | SNDRV_SEQ_PORT_CAP_SYNC_WRITE | SNDRV_SEQ_PORT_CAP_SUBS_WRITE; | |
398 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_READ | SNDRV_SEQ_PORT_CAP_SYNC_READ | SNDRV_SEQ_PORT_CAP_SUBS_READ; | |
399 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_DUPLEX; | |
450047a7 CL |
400 | pinfo->type = SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
401 | | SNDRV_SEQ_PORT_TYPE_SOFTWARE | |
402 | | SNDRV_SEQ_PORT_TYPE_PORT; | |
1da177e4 LT |
403 | pinfo->midi_channels = 16; |
404 | memset(&pcallbacks, 0, sizeof(pcallbacks)); | |
405 | pcallbacks.owner = THIS_MODULE; | |
406 | pcallbacks.private_data = rdev; | |
407 | pcallbacks.subscribe = snd_virmidi_subscribe; | |
408 | pcallbacks.unsubscribe = snd_virmidi_unsubscribe; | |
409 | pcallbacks.use = snd_virmidi_use; | |
410 | pcallbacks.unuse = snd_virmidi_unuse; | |
411 | pcallbacks.event_input = snd_virmidi_event_input; | |
412 | pinfo->kernel = &pcallbacks; | |
0aa0d387 | 413 | err = snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, pinfo); |
1da177e4 LT |
414 | if (err < 0) { |
415 | snd_seq_delete_kernel_client(client); | |
416 | rdev->client = -1; | |
417 | goto __error; | |
418 | } | |
419 | ||
420 | rdev->port = pinfo->addr.port; | |
421 | err = 0; /* success */ | |
422 | ||
423 | __error: | |
1da177e4 LT |
424 | kfree(pinfo); |
425 | return err; | |
426 | } | |
427 | ||
428 | ||
429 | /* | |
430 | * release the sequencer client | |
431 | */ | |
c7e0b5bf | 432 | static void snd_virmidi_dev_detach_seq(struct snd_virmidi_dev *rdev) |
1da177e4 LT |
433 | { |
434 | if (rdev->client >= 0) { | |
435 | snd_seq_delete_kernel_client(rdev->client); | |
436 | rdev->client = -1; | |
437 | } | |
438 | } | |
439 | ||
440 | /* | |
441 | * register the device | |
442 | */ | |
c7e0b5bf | 443 | static int snd_virmidi_dev_register(struct snd_rawmidi *rmidi) |
1da177e4 | 444 | { |
c7e0b5bf | 445 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
1da177e4 LT |
446 | int err; |
447 | ||
448 | switch (rdev->seq_mode) { | |
449 | case SNDRV_VIRMIDI_SEQ_DISPATCH: | |
450 | err = snd_virmidi_dev_attach_seq(rdev); | |
451 | if (err < 0) | |
452 | return err; | |
453 | break; | |
454 | case SNDRV_VIRMIDI_SEQ_ATTACH: | |
455 | if (rdev->client == 0) | |
456 | return -EINVAL; | |
457 | /* should check presence of port more strictly.. */ | |
458 | break; | |
459 | default: | |
04cc79a0 | 460 | pr_err("ALSA: seq_virmidi: seq_mode is not set: %d\n", rdev->seq_mode); |
1da177e4 LT |
461 | return -EINVAL; |
462 | } | |
463 | return 0; | |
464 | } | |
465 | ||
466 | ||
467 | /* | |
468 | * unregister the device | |
469 | */ | |
c7e0b5bf | 470 | static int snd_virmidi_dev_unregister(struct snd_rawmidi *rmidi) |
1da177e4 | 471 | { |
c7e0b5bf | 472 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
1da177e4 LT |
473 | |
474 | if (rdev->seq_mode == SNDRV_VIRMIDI_SEQ_DISPATCH) | |
475 | snd_virmidi_dev_detach_seq(rdev); | |
476 | return 0; | |
477 | } | |
478 | ||
479 | /* | |
480 | * | |
481 | */ | |
efdbe3c3 | 482 | static const struct snd_rawmidi_global_ops snd_virmidi_global_ops = { |
1da177e4 LT |
483 | .dev_register = snd_virmidi_dev_register, |
484 | .dev_unregister = snd_virmidi_dev_unregister, | |
485 | }; | |
486 | ||
487 | /* | |
488 | * free device | |
489 | */ | |
c7e0b5bf | 490 | static void snd_virmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 491 | { |
c7e0b5bf | 492 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
1da177e4 LT |
493 | kfree(rdev); |
494 | } | |
495 | ||
496 | /* | |
497 | * create a new device | |
498 | * | |
499 | */ | |
500 | /* exported */ | |
c7e0b5bf | 501 | int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi) |
1da177e4 | 502 | { |
c7e0b5bf TI |
503 | struct snd_rawmidi *rmidi; |
504 | struct snd_virmidi_dev *rdev; | |
1da177e4 LT |
505 | int err; |
506 | ||
507 | *rrmidi = NULL; | |
508 | if ((err = snd_rawmidi_new(card, "VirMidi", device, | |
509 | 16, /* may be configurable */ | |
510 | 16, /* may be configurable */ | |
511 | &rmidi)) < 0) | |
512 | return err; | |
513 | strcpy(rmidi->name, rmidi->id); | |
ecca82b4 | 514 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
1da177e4 LT |
515 | if (rdev == NULL) { |
516 | snd_device_free(card, rmidi); | |
517 | return -ENOMEM; | |
518 | } | |
519 | rdev->card = card; | |
520 | rdev->rmidi = rmidi; | |
521 | rdev->device = device; | |
522 | rdev->client = -1; | |
523 | rwlock_init(&rdev->filelist_lock); | |
524 | INIT_LIST_HEAD(&rdev->filelist); | |
525 | rdev->seq_mode = SNDRV_VIRMIDI_SEQ_DISPATCH; | |
526 | rmidi->private_data = rdev; | |
527 | rmidi->private_free = snd_virmidi_free; | |
528 | rmidi->ops = &snd_virmidi_global_ops; | |
529 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_virmidi_input_ops); | |
530 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_virmidi_output_ops); | |
531 | rmidi->info_flags = SNDRV_RAWMIDI_INFO_INPUT | | |
532 | SNDRV_RAWMIDI_INFO_OUTPUT | | |
533 | SNDRV_RAWMIDI_INFO_DUPLEX; | |
534 | *rrmidi = rmidi; | |
535 | return 0; | |
536 | } | |
537 | ||
538 | /* | |
539 | * ENTRY functions | |
540 | */ | |
541 | ||
542 | static int __init alsa_virmidi_init(void) | |
543 | { | |
544 | return 0; | |
545 | } | |
546 | ||
547 | static void __exit alsa_virmidi_exit(void) | |
548 | { | |
549 | } | |
550 | ||
551 | module_init(alsa_virmidi_init) | |
552 | module_exit(alsa_virmidi_exit) | |
553 | ||
554 | EXPORT_SYMBOL(snd_virmidi_new); |