Commit | Line | Data |
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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 | 79 | static int snd_virmidi_dev_receive_event(struct snd_virmidi_dev *rdev, |
5803b023 TI |
80 | struct snd_seq_event *ev, |
81 | bool atomic) | |
1da177e4 | 82 | { |
c7e0b5bf | 83 | struct snd_virmidi *vmidi; |
1da177e4 LT |
84 | unsigned char msg[4]; |
85 | int len; | |
86 | ||
5803b023 TI |
87 | if (atomic) |
88 | read_lock(&rdev->filelist_lock); | |
89 | else | |
90 | down_read(&rdev->filelist_sem); | |
9244b2c3 | 91 | list_for_each_entry(vmidi, &rdev->filelist, list) { |
1da177e4 LT |
92 | if (!vmidi->trigger) |
93 | continue; | |
94 | if (ev->type == SNDRV_SEQ_EVENT_SYSEX) { | |
95 | if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARIABLE) | |
96 | continue; | |
97 | snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)snd_rawmidi_receive, vmidi->substream); | |
98 | } else { | |
99 | len = snd_midi_event_decode(vmidi->parser, msg, sizeof(msg), ev); | |
100 | if (len > 0) | |
101 | snd_rawmidi_receive(vmidi->substream, msg, len); | |
102 | } | |
103 | } | |
5803b023 TI |
104 | if (atomic) |
105 | read_unlock(&rdev->filelist_lock); | |
106 | else | |
107 | up_read(&rdev->filelist_sem); | |
1da177e4 LT |
108 | |
109 | return 0; | |
110 | } | |
111 | ||
112 | /* | |
113 | * receive an event from the remote virmidi port | |
114 | * | |
115 | * for rawmidi inputs, you can call this function from the event | |
116 | * handler of a remote port which is attached to the virmidi via | |
117 | * SNDRV_VIRMIDI_SEQ_ATTACH. | |
118 | */ | |
123992f7 | 119 | #if 0 |
c7e0b5bf | 120 | int snd_virmidi_receive(struct snd_rawmidi *rmidi, struct snd_seq_event *ev) |
1da177e4 | 121 | { |
c7e0b5bf | 122 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
123 | |
124 | rdev = rmidi->private_data; | |
5803b023 | 125 | return snd_virmidi_dev_receive_event(rdev, ev, true); |
1da177e4 | 126 | } |
123992f7 | 127 | #endif /* 0 */ |
1da177e4 LT |
128 | |
129 | /* | |
130 | * event handler of virmidi port | |
131 | */ | |
c7e0b5bf | 132 | static int snd_virmidi_event_input(struct snd_seq_event *ev, int direct, |
1da177e4 LT |
133 | void *private_data, int atomic, int hop) |
134 | { | |
c7e0b5bf | 135 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
136 | |
137 | rdev = private_data; | |
138 | if (!(rdev->flags & SNDRV_VIRMIDI_USE)) | |
139 | return 0; /* ignored */ | |
5803b023 | 140 | return snd_virmidi_dev_receive_event(rdev, ev, atomic); |
1da177e4 LT |
141 | } |
142 | ||
143 | /* | |
144 | * trigger rawmidi stream for input | |
145 | */ | |
c7e0b5bf | 146 | static void snd_virmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 147 | { |
c7e0b5bf | 148 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
1da177e4 LT |
149 | |
150 | if (up) { | |
151 | vmidi->trigger = 1; | |
152 | } else { | |
153 | vmidi->trigger = 0; | |
154 | } | |
155 | } | |
156 | ||
157 | /* | |
158 | * trigger rawmidi stream for output | |
159 | */ | |
c7e0b5bf | 160 | static void snd_virmidi_output_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 161 | { |
c7e0b5bf | 162 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
1da177e4 LT |
163 | int count, res; |
164 | unsigned char buf[32], *pbuf; | |
06ab3003 | 165 | unsigned long flags; |
1da177e4 LT |
166 | |
167 | if (up) { | |
168 | vmidi->trigger = 1; | |
169 | if (vmidi->seq_mode == SNDRV_VIRMIDI_SEQ_DISPATCH && | |
170 | !(vmidi->rdev->flags & SNDRV_VIRMIDI_SUBSCRIBE)) { | |
06ab3003 TI |
171 | while (snd_rawmidi_transmit(substream, buf, |
172 | sizeof(buf)) > 0) { | |
173 | /* ignored */ | |
174 | } | |
175 | return; | |
1da177e4 | 176 | } |
8f22e525 | 177 | spin_lock_irqsave(&substream->runtime->lock, flags); |
1da177e4 | 178 | if (vmidi->event.type != SNDRV_SEQ_EVENT_NONE) { |
62c5549e | 179 | if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0) |
8f22e525 | 180 | goto out; |
1da177e4 LT |
181 | vmidi->event.type = SNDRV_SEQ_EVENT_NONE; |
182 | } | |
183 | while (1) { | |
06ab3003 | 184 | count = __snd_rawmidi_transmit_peek(substream, buf, sizeof(buf)); |
1da177e4 LT |
185 | if (count <= 0) |
186 | break; | |
187 | pbuf = buf; | |
188 | while (count > 0) { | |
189 | res = snd_midi_event_encode(vmidi->parser, pbuf, count, &vmidi->event); | |
190 | if (res < 0) { | |
191 | snd_midi_event_reset_encode(vmidi->parser); | |
192 | continue; | |
193 | } | |
06ab3003 | 194 | __snd_rawmidi_transmit_ack(substream, res); |
1da177e4 LT |
195 | pbuf += res; |
196 | count -= res; | |
197 | if (vmidi->event.type != SNDRV_SEQ_EVENT_NONE) { | |
62c5549e | 198 | if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0) |
06ab3003 | 199 | goto out; |
1da177e4 LT |
200 | vmidi->event.type = SNDRV_SEQ_EVENT_NONE; |
201 | } | |
202 | } | |
203 | } | |
06ab3003 TI |
204 | out: |
205 | spin_unlock_irqrestore(&substream->runtime->lock, flags); | |
1da177e4 LT |
206 | } else { |
207 | vmidi->trigger = 0; | |
208 | } | |
209 | } | |
210 | ||
211 | /* | |
212 | * open rawmidi handle for input | |
213 | */ | |
c7e0b5bf | 214 | static int snd_virmidi_input_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 215 | { |
c7e0b5bf TI |
216 | struct snd_virmidi_dev *rdev = substream->rmidi->private_data; |
217 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
218 | struct snd_virmidi *vmidi; | |
1da177e4 | 219 | |
ecca82b4 | 220 | vmidi = kzalloc(sizeof(*vmidi), GFP_KERNEL); |
1da177e4 LT |
221 | if (vmidi == NULL) |
222 | return -ENOMEM; | |
223 | vmidi->substream = substream; | |
224 | if (snd_midi_event_new(0, &vmidi->parser) < 0) { | |
225 | kfree(vmidi); | |
226 | return -ENOMEM; | |
227 | } | |
228 | vmidi->seq_mode = rdev->seq_mode; | |
229 | vmidi->client = rdev->client; | |
230 | vmidi->port = rdev->port; | |
231 | runtime->private_data = vmidi; | |
5803b023 TI |
232 | down_write(&rdev->filelist_sem); |
233 | write_lock_irq(&rdev->filelist_lock); | |
1da177e4 | 234 | list_add_tail(&vmidi->list, &rdev->filelist); |
5803b023 TI |
235 | write_unlock_irq(&rdev->filelist_lock); |
236 | up_write(&rdev->filelist_sem); | |
1da177e4 LT |
237 | vmidi->rdev = rdev; |
238 | return 0; | |
239 | } | |
240 | ||
241 | /* | |
242 | * open rawmidi handle for output | |
243 | */ | |
c7e0b5bf | 244 | static int snd_virmidi_output_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 245 | { |
c7e0b5bf TI |
246 | struct snd_virmidi_dev *rdev = substream->rmidi->private_data; |
247 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
248 | struct snd_virmidi *vmidi; | |
1da177e4 | 249 | |
ecca82b4 | 250 | vmidi = kzalloc(sizeof(*vmidi), GFP_KERNEL); |
1da177e4 LT |
251 | if (vmidi == NULL) |
252 | return -ENOMEM; | |
253 | vmidi->substream = substream; | |
254 | if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &vmidi->parser) < 0) { | |
255 | kfree(vmidi); | |
256 | return -ENOMEM; | |
257 | } | |
258 | vmidi->seq_mode = rdev->seq_mode; | |
259 | vmidi->client = rdev->client; | |
260 | vmidi->port = rdev->port; | |
261 | snd_virmidi_init_event(vmidi, &vmidi->event); | |
262 | vmidi->rdev = rdev; | |
263 | runtime->private_data = vmidi; | |
264 | return 0; | |
265 | } | |
266 | ||
267 | /* | |
268 | * close rawmidi handle for input | |
269 | */ | |
c7e0b5bf | 270 | static int snd_virmidi_input_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 271 | { |
2d1b5c08 | 272 | struct snd_virmidi_dev *rdev = substream->rmidi->private_data; |
c7e0b5bf | 273 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
2d1b5c08 | 274 | |
5803b023 | 275 | down_write(&rdev->filelist_sem); |
2d1b5c08 | 276 | write_lock_irq(&rdev->filelist_lock); |
1da177e4 | 277 | list_del(&vmidi->list); |
2d1b5c08 | 278 | write_unlock_irq(&rdev->filelist_lock); |
5803b023 | 279 | up_write(&rdev->filelist_sem); |
2d1b5c08 | 280 | snd_midi_event_free(vmidi->parser); |
1da177e4 LT |
281 | substream->runtime->private_data = NULL; |
282 | kfree(vmidi); | |
283 | return 0; | |
284 | } | |
285 | ||
286 | /* | |
287 | * close rawmidi handle for output | |
288 | */ | |
c7e0b5bf | 289 | static int snd_virmidi_output_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 290 | { |
c7e0b5bf | 291 | struct snd_virmidi *vmidi = substream->runtime->private_data; |
1da177e4 LT |
292 | snd_midi_event_free(vmidi->parser); |
293 | substream->runtime->private_data = NULL; | |
294 | kfree(vmidi); | |
295 | return 0; | |
296 | } | |
297 | ||
298 | /* | |
299 | * subscribe callback - allow output to rawmidi device | |
300 | */ | |
c7e0b5bf TI |
301 | static int snd_virmidi_subscribe(void *private_data, |
302 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 303 | { |
c7e0b5bf | 304 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
305 | |
306 | rdev = private_data; | |
307 | if (!try_module_get(rdev->card->module)) | |
308 | return -EFAULT; | |
309 | rdev->flags |= SNDRV_VIRMIDI_SUBSCRIBE; | |
310 | return 0; | |
311 | } | |
312 | ||
313 | /* | |
314 | * unsubscribe callback - disallow output to rawmidi device | |
315 | */ | |
c7e0b5bf TI |
316 | static int snd_virmidi_unsubscribe(void *private_data, |
317 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 318 | { |
c7e0b5bf | 319 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
320 | |
321 | rdev = private_data; | |
322 | rdev->flags &= ~SNDRV_VIRMIDI_SUBSCRIBE; | |
323 | module_put(rdev->card->module); | |
324 | return 0; | |
325 | } | |
326 | ||
327 | ||
328 | /* | |
329 | * use callback - allow input to rawmidi device | |
330 | */ | |
c7e0b5bf TI |
331 | static int snd_virmidi_use(void *private_data, |
332 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 333 | { |
c7e0b5bf | 334 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
335 | |
336 | rdev = private_data; | |
337 | if (!try_module_get(rdev->card->module)) | |
338 | return -EFAULT; | |
339 | rdev->flags |= SNDRV_VIRMIDI_USE; | |
340 | return 0; | |
341 | } | |
342 | ||
343 | /* | |
344 | * unuse callback - disallow input to rawmidi device | |
345 | */ | |
c7e0b5bf TI |
346 | static int snd_virmidi_unuse(void *private_data, |
347 | struct snd_seq_port_subscribe *info) | |
1da177e4 | 348 | { |
c7e0b5bf | 349 | struct snd_virmidi_dev *rdev; |
1da177e4 LT |
350 | |
351 | rdev = private_data; | |
352 | rdev->flags &= ~SNDRV_VIRMIDI_USE; | |
353 | module_put(rdev->card->module); | |
354 | return 0; | |
355 | } | |
356 | ||
357 | ||
358 | /* | |
359 | * Register functions | |
360 | */ | |
361 | ||
c62a5700 | 362 | static const struct snd_rawmidi_ops snd_virmidi_input_ops = { |
1da177e4 LT |
363 | .open = snd_virmidi_input_open, |
364 | .close = snd_virmidi_input_close, | |
365 | .trigger = snd_virmidi_input_trigger, | |
366 | }; | |
367 | ||
c62a5700 | 368 | static const struct snd_rawmidi_ops snd_virmidi_output_ops = { |
1da177e4 LT |
369 | .open = snd_virmidi_output_open, |
370 | .close = snd_virmidi_output_close, | |
371 | .trigger = snd_virmidi_output_trigger, | |
372 | }; | |
373 | ||
374 | /* | |
375 | * create a sequencer client and a port | |
376 | */ | |
c7e0b5bf | 377 | static int snd_virmidi_dev_attach_seq(struct snd_virmidi_dev *rdev) |
1da177e4 LT |
378 | { |
379 | int client; | |
c7e0b5bf | 380 | struct snd_seq_port_callback pcallbacks; |
c7e0b5bf | 381 | struct snd_seq_port_info *pinfo; |
1da177e4 LT |
382 | int err; |
383 | ||
384 | if (rdev->client >= 0) | |
385 | return 0; | |
386 | ||
dd00cc48 | 387 | pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL); |
7b6d9245 | 388 | if (!pinfo) { |
1da177e4 LT |
389 | err = -ENOMEM; |
390 | goto __error; | |
391 | } | |
392 | ||
7b6d9245 CL |
393 | client = snd_seq_create_kernel_client(rdev->card, rdev->device, |
394 | "%s %d-%d", rdev->rmidi->name, | |
395 | rdev->card->number, | |
396 | rdev->device); | |
1da177e4 LT |
397 | if (client < 0) { |
398 | err = client; | |
399 | goto __error; | |
400 | } | |
401 | rdev->client = client; | |
402 | ||
1da177e4 | 403 | /* create a port */ |
1da177e4 LT |
404 | pinfo->addr.client = client; |
405 | sprintf(pinfo->name, "VirMIDI %d-%d", rdev->card->number, rdev->device); | |
406 | /* set all capabilities */ | |
407 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_WRITE | SNDRV_SEQ_PORT_CAP_SYNC_WRITE | SNDRV_SEQ_PORT_CAP_SUBS_WRITE; | |
408 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_READ | SNDRV_SEQ_PORT_CAP_SYNC_READ | SNDRV_SEQ_PORT_CAP_SUBS_READ; | |
409 | pinfo->capability |= SNDRV_SEQ_PORT_CAP_DUPLEX; | |
450047a7 CL |
410 | pinfo->type = SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
411 | | SNDRV_SEQ_PORT_TYPE_SOFTWARE | |
412 | | SNDRV_SEQ_PORT_TYPE_PORT; | |
1da177e4 LT |
413 | pinfo->midi_channels = 16; |
414 | memset(&pcallbacks, 0, sizeof(pcallbacks)); | |
415 | pcallbacks.owner = THIS_MODULE; | |
416 | pcallbacks.private_data = rdev; | |
417 | pcallbacks.subscribe = snd_virmidi_subscribe; | |
418 | pcallbacks.unsubscribe = snd_virmidi_unsubscribe; | |
419 | pcallbacks.use = snd_virmidi_use; | |
420 | pcallbacks.unuse = snd_virmidi_unuse; | |
421 | pcallbacks.event_input = snd_virmidi_event_input; | |
422 | pinfo->kernel = &pcallbacks; | |
0aa0d387 | 423 | err = snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, pinfo); |
1da177e4 LT |
424 | if (err < 0) { |
425 | snd_seq_delete_kernel_client(client); | |
426 | rdev->client = -1; | |
427 | goto __error; | |
428 | } | |
429 | ||
430 | rdev->port = pinfo->addr.port; | |
431 | err = 0; /* success */ | |
432 | ||
433 | __error: | |
1da177e4 LT |
434 | kfree(pinfo); |
435 | return err; | |
436 | } | |
437 | ||
438 | ||
439 | /* | |
440 | * release the sequencer client | |
441 | */ | |
c7e0b5bf | 442 | static void snd_virmidi_dev_detach_seq(struct snd_virmidi_dev *rdev) |
1da177e4 LT |
443 | { |
444 | if (rdev->client >= 0) { | |
445 | snd_seq_delete_kernel_client(rdev->client); | |
446 | rdev->client = -1; | |
447 | } | |
448 | } | |
449 | ||
450 | /* | |
451 | * register the device | |
452 | */ | |
c7e0b5bf | 453 | static int snd_virmidi_dev_register(struct snd_rawmidi *rmidi) |
1da177e4 | 454 | { |
c7e0b5bf | 455 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
1da177e4 LT |
456 | int err; |
457 | ||
458 | switch (rdev->seq_mode) { | |
459 | case SNDRV_VIRMIDI_SEQ_DISPATCH: | |
460 | err = snd_virmidi_dev_attach_seq(rdev); | |
461 | if (err < 0) | |
462 | return err; | |
463 | break; | |
464 | case SNDRV_VIRMIDI_SEQ_ATTACH: | |
465 | if (rdev->client == 0) | |
466 | return -EINVAL; | |
467 | /* should check presence of port more strictly.. */ | |
468 | break; | |
469 | default: | |
04cc79a0 | 470 | pr_err("ALSA: seq_virmidi: seq_mode is not set: %d\n", rdev->seq_mode); |
1da177e4 LT |
471 | return -EINVAL; |
472 | } | |
473 | return 0; | |
474 | } | |
475 | ||
476 | ||
477 | /* | |
478 | * unregister the device | |
479 | */ | |
c7e0b5bf | 480 | static int snd_virmidi_dev_unregister(struct snd_rawmidi *rmidi) |
1da177e4 | 481 | { |
c7e0b5bf | 482 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
1da177e4 LT |
483 | |
484 | if (rdev->seq_mode == SNDRV_VIRMIDI_SEQ_DISPATCH) | |
485 | snd_virmidi_dev_detach_seq(rdev); | |
486 | return 0; | |
487 | } | |
488 | ||
489 | /* | |
490 | * | |
491 | */ | |
efdbe3c3 | 492 | static const struct snd_rawmidi_global_ops snd_virmidi_global_ops = { |
1da177e4 LT |
493 | .dev_register = snd_virmidi_dev_register, |
494 | .dev_unregister = snd_virmidi_dev_unregister, | |
495 | }; | |
496 | ||
497 | /* | |
498 | * free device | |
499 | */ | |
c7e0b5bf | 500 | static void snd_virmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 501 | { |
c7e0b5bf | 502 | struct snd_virmidi_dev *rdev = rmidi->private_data; |
1da177e4 LT |
503 | kfree(rdev); |
504 | } | |
505 | ||
506 | /* | |
507 | * create a new device | |
508 | * | |
509 | */ | |
510 | /* exported */ | |
c7e0b5bf | 511 | int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi) |
1da177e4 | 512 | { |
c7e0b5bf TI |
513 | struct snd_rawmidi *rmidi; |
514 | struct snd_virmidi_dev *rdev; | |
1da177e4 LT |
515 | int err; |
516 | ||
517 | *rrmidi = NULL; | |
518 | if ((err = snd_rawmidi_new(card, "VirMidi", device, | |
519 | 16, /* may be configurable */ | |
520 | 16, /* may be configurable */ | |
521 | &rmidi)) < 0) | |
522 | return err; | |
523 | strcpy(rmidi->name, rmidi->id); | |
ecca82b4 | 524 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); |
1da177e4 LT |
525 | if (rdev == NULL) { |
526 | snd_device_free(card, rmidi); | |
527 | return -ENOMEM; | |
528 | } | |
529 | rdev->card = card; | |
530 | rdev->rmidi = rmidi; | |
531 | rdev->device = device; | |
532 | rdev->client = -1; | |
5803b023 | 533 | init_rwsem(&rdev->filelist_sem); |
1da177e4 LT |
534 | rwlock_init(&rdev->filelist_lock); |
535 | INIT_LIST_HEAD(&rdev->filelist); | |
536 | rdev->seq_mode = SNDRV_VIRMIDI_SEQ_DISPATCH; | |
537 | rmidi->private_data = rdev; | |
538 | rmidi->private_free = snd_virmidi_free; | |
539 | rmidi->ops = &snd_virmidi_global_ops; | |
540 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_virmidi_input_ops); | |
541 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_virmidi_output_ops); | |
542 | rmidi->info_flags = SNDRV_RAWMIDI_INFO_INPUT | | |
543 | SNDRV_RAWMIDI_INFO_OUTPUT | | |
544 | SNDRV_RAWMIDI_INFO_DUPLEX; | |
545 | *rrmidi = rmidi; | |
546 | return 0; | |
547 | } | |
9c8ddd10 | 548 | EXPORT_SYMBOL(snd_virmidi_new); |
1da177e4 LT |
549 | |
550 | /* | |
551 | * ENTRY functions | |
552 | */ | |
553 | ||
554 | static int __init alsa_virmidi_init(void) | |
555 | { | |
556 | return 0; | |
557 | } | |
558 | ||
559 | static void __exit alsa_virmidi_exit(void) | |
560 | { | |
561 | } | |
562 | ||
563 | module_init(alsa_virmidi_init) | |
564 | module_exit(alsa_virmidi_exit) |