blob: 56e0f4cd3f8299837053961747a64b8a736b3867 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/init.h>
39#include <linux/wait.h>
Paul Gortmakerda155d52011-07-15 12:38:28 -040040#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#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
51MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
52MODULE_DESCRIPTION("Virtual Raw MIDI client on Sequencer");
53MODULE_LICENSE("GPL");
54
55/*
56 * initialize an event record
57 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +010058static void snd_virmidi_init_event(struct snd_virmidi *vmidi,
59 struct snd_seq_event *ev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070060{
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 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +010079static int snd_virmidi_dev_receive_event(struct snd_virmidi_dev *rdev,
80 struct snd_seq_event *ev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070081{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +010082 struct snd_virmidi *vmidi;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 unsigned char msg[4];
84 int len;
85
86 read_lock(&rdev->filelist_lock);
Johannes Berg9244b2c2006-10-05 16:02:22 +020087 list_for_each_entry(vmidi, &rdev->filelist, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 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 */
Adrian Bunk123992f2005-05-18 18:02:04 +0200112#if 0
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100113int snd_virmidi_receive(struct snd_rawmidi *rmidi, struct snd_seq_event *ev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100115 struct snd_virmidi_dev *rdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
117 rdev = rmidi->private_data;
118 return snd_virmidi_dev_receive_event(rdev, ev);
119}
Adrian Bunk123992f2005-05-18 18:02:04 +0200120#endif /* 0 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
122/*
123 * event handler of virmidi port
124 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100125static int snd_virmidi_event_input(struct snd_seq_event *ev, int direct,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 void *private_data, int atomic, int hop)
127{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100128 struct snd_virmidi_dev *rdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
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 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100139static void snd_virmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100141 struct snd_virmidi *vmidi = substream->runtime->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
143 if (up) {
144 vmidi->trigger = 1;
145 } else {
146 vmidi->trigger = 0;
147 }
148}
149
150/*
151 * trigger rawmidi stream for output
152 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100153static void snd_virmidi_output_trigger(struct snd_rawmidi_substream *substream, int up)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100155 struct snd_virmidi *vmidi = substream->runtime->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 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) {
Takashi Iwai62c5549e2006-02-22 17:14:34 +0100167 if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 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) {
Takashi Iwai62c5549e2006-02-22 17:14:34 +0100186 if (snd_seq_kernel_client_dispatch(vmidi->client, &vmidi->event, in_atomic(), 0) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 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 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100200static int snd_virmidi_input_open(struct snd_rawmidi_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100202 struct snd_virmidi_dev *rdev = substream->rmidi->private_data;
203 struct snd_rawmidi_runtime *runtime = substream->runtime;
204 struct snd_virmidi *vmidi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 unsigned long flags;
206
Takashi Iwaiecca82b2005-09-09 14:20:49 +0200207 vmidi = kzalloc(sizeof(*vmidi), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 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 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100229static int snd_virmidi_output_open(struct snd_rawmidi_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100231 struct snd_virmidi_dev *rdev = substream->rmidi->private_data;
232 struct snd_rawmidi_runtime *runtime = substream->runtime;
233 struct snd_virmidi *vmidi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
Takashi Iwaiecca82b2005-09-09 14:20:49 +0200235 vmidi = kzalloc(sizeof(*vmidi), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 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 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100255static int snd_virmidi_input_close(struct snd_rawmidi_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100257 struct snd_virmidi *vmidi = substream->runtime->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 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 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100268static int snd_virmidi_output_close(struct snd_rawmidi_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100270 struct snd_virmidi *vmidi = substream->runtime->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 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 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100280static int snd_virmidi_subscribe(void *private_data,
281 struct snd_seq_port_subscribe *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100283 struct snd_virmidi_dev *rdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284
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 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100295static int snd_virmidi_unsubscribe(void *private_data,
296 struct snd_seq_port_subscribe *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100298 struct snd_virmidi_dev *rdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
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 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100310static int snd_virmidi_use(void *private_data,
311 struct snd_seq_port_subscribe *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100313 struct snd_virmidi_dev *rdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
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 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100325static int snd_virmidi_unuse(void *private_data,
326 struct snd_seq_port_subscribe *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100328 struct snd_virmidi_dev *rdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
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
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100341static struct snd_rawmidi_ops snd_virmidi_input_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 .open = snd_virmidi_input_open,
343 .close = snd_virmidi_input_close,
344 .trigger = snd_virmidi_input_trigger,
345};
346
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100347static struct snd_rawmidi_ops snd_virmidi_output_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 .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 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100356static int snd_virmidi_dev_attach_seq(struct snd_virmidi_dev *rdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357{
358 int client;
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100359 struct snd_seq_port_callback pcallbacks;
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100360 struct snd_seq_port_info *pinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 int err;
362
363 if (rdev->client >= 0)
364 return 0;
365
Yoann Padioleaudd00cc42007-07-19 01:49:03 -0700366 pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL);
Clemens Ladisch7b6d9242005-12-12 09:33:37 +0100367 if (!pinfo) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 err = -ENOMEM;
369 goto __error;
370 }
371
Clemens Ladisch7b6d9242005-12-12 09:33:37 +0100372 client = snd_seq_create_kernel_client(rdev->card, rdev->device,
373 "%s %d-%d", rdev->rmidi->name,
374 rdev->card->number,
375 rdev->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 if (client < 0) {
377 err = client;
378 goto __error;
379 }
380 rdev->client = client;
381
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 /* create a port */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 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;
Clemens Ladisch450047a2006-05-02 16:08:41 +0200389 pinfo->type = SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC
390 | SNDRV_SEQ_PORT_TYPE_SOFTWARE
391 | SNDRV_SEQ_PORT_TYPE_PORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 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;
Clemens Ladisch0aa0d382005-04-06 09:43:59 +0200402 err = snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, pinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 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:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 kfree(pinfo);
414 return err;
415}
416
417
418/*
419 * release the sequencer client
420 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100421static void snd_virmidi_dev_detach_seq(struct snd_virmidi_dev *rdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422{
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 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100432static int snd_virmidi_dev_register(struct snd_rawmidi *rmidi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100434 struct snd_virmidi_dev *rdev = rmidi->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 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:
Takashi Iwai04cc79a2014-02-04 18:24:34 +0100449 pr_err("ALSA: seq_virmidi: seq_mode is not set: %d\n", rdev->seq_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 return -EINVAL;
451 }
452 return 0;
453}
454
455
456/*
457 * unregister the device
458 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100459static int snd_virmidi_dev_unregister(struct snd_rawmidi *rmidi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100461 struct snd_virmidi_dev *rdev = rmidi->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462
463 if (rdev->seq_mode == SNDRV_VIRMIDI_SEQ_DISPATCH)
464 snd_virmidi_dev_detach_seq(rdev);
465 return 0;
466}
467
468/*
469 *
470 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100471static struct snd_rawmidi_global_ops snd_virmidi_global_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 .dev_register = snd_virmidi_dev_register,
473 .dev_unregister = snd_virmidi_dev_unregister,
474};
475
476/*
477 * free device
478 */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100479static void snd_virmidi_free(struct snd_rawmidi *rmidi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100481 struct snd_virmidi_dev *rdev = rmidi->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 kfree(rdev);
483}
484
485/*
486 * create a new device
487 *
488 */
489/* exported */
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100490int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491{
Takashi Iwaic7e0b5b2005-11-17 14:04:02 +0100492 struct snd_rawmidi *rmidi;
493 struct snd_virmidi_dev *rdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 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);
Takashi Iwaiecca82b2005-09-09 14:20:49 +0200503 rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 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
531static int __init alsa_virmidi_init(void)
532{
533 return 0;
534}
535
536static void __exit alsa_virmidi_exit(void)
537{
538}
539
540module_init(alsa_virmidi_init)
541module_exit(alsa_virmidi_exit)
542
543EXPORT_SYMBOL(snd_virmidi_new);