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1da177e4 LT |
1 | /* |
2 | * Generic MIDI synth driver for ALSA sequencer | |
3 | * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl> | |
c1017a4c | 4 | * Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
22 | /* | |
23 | Possible options for midisynth module: | |
24 | - automatic opening of midi ports on first received event or subscription | |
25 | (close will be performed when client leaves) | |
26 | */ | |
27 | ||
28 | ||
1da177e4 LT |
29 | #include <linux/init.h> |
30 | #include <linux/slab.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/moduleparam.h> | |
1a60d4c5 | 34 | #include <linux/mutex.h> |
1da177e4 LT |
35 | #include <sound/core.h> |
36 | #include <sound/rawmidi.h> | |
37 | #include <sound/seq_kernel.h> | |
38 | #include <sound/seq_device.h> | |
39 | #include <sound/seq_midi_event.h> | |
40 | #include <sound/initval.h> | |
41 | ||
c1017a4c | 42 | MODULE_AUTHOR("Frank van de Pol <fvdpol@coil.demon.nl>, Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
43 | MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer MIDI synth."); |
44 | MODULE_LICENSE("GPL"); | |
45 | static int output_buffer_size = PAGE_SIZE; | |
46 | module_param(output_buffer_size, int, 0644); | |
47 | MODULE_PARM_DESC(output_buffer_size, "Output buffer size in bytes."); | |
48 | static int input_buffer_size = PAGE_SIZE; | |
49 | module_param(input_buffer_size, int, 0644); | |
50 | MODULE_PARM_DESC(input_buffer_size, "Input buffer size in bytes."); | |
51 | ||
52 | /* data for this midi synth driver */ | |
c7e0b5bf TI |
53 | struct seq_midisynth { |
54 | struct snd_card *card; | |
1da177e4 LT |
55 | int device; |
56 | int subdevice; | |
c7e0b5bf TI |
57 | struct snd_rawmidi_file input_rfile; |
58 | struct snd_rawmidi_file output_rfile; | |
1da177e4 LT |
59 | int seq_client; |
60 | int seq_port; | |
c7e0b5bf TI |
61 | struct snd_midi_event *parser; |
62 | }; | |
1da177e4 | 63 | |
c7e0b5bf | 64 | struct seq_midisynth_client { |
1da177e4 LT |
65 | int seq_client; |
66 | int num_ports; | |
67 | int ports_per_device[SNDRV_RAWMIDI_DEVICES]; | |
c7e0b5bf TI |
68 | struct seq_midisynth *ports[SNDRV_RAWMIDI_DEVICES]; |
69 | }; | |
1da177e4 | 70 | |
c7e0b5bf | 71 | static struct seq_midisynth_client *synths[SNDRV_CARDS]; |
1a60d4c5 | 72 | static DEFINE_MUTEX(register_mutex); |
1da177e4 LT |
73 | |
74 | /* handle rawmidi input event (MIDI v1.0 stream) */ | |
c7e0b5bf | 75 | static void snd_midi_input_event(struct snd_rawmidi_substream *substream) |
1da177e4 | 76 | { |
c7e0b5bf TI |
77 | struct snd_rawmidi_runtime *runtime; |
78 | struct seq_midisynth *msynth; | |
79 | struct snd_seq_event ev; | |
1da177e4 LT |
80 | char buf[16], *pbuf; |
81 | long res, count; | |
82 | ||
83 | if (substream == NULL) | |
84 | return; | |
85 | runtime = substream->runtime; | |
c7e0b5bf | 86 | msynth = runtime->private_data; |
1da177e4 LT |
87 | if (msynth == NULL) |
88 | return; | |
89 | memset(&ev, 0, sizeof(ev)); | |
90 | while (runtime->avail > 0) { | |
91 | res = snd_rawmidi_kernel_read(substream, buf, sizeof(buf)); | |
92 | if (res <= 0) | |
93 | continue; | |
94 | if (msynth->parser == NULL) | |
95 | continue; | |
96 | pbuf = buf; | |
97 | while (res > 0) { | |
98 | count = snd_midi_event_encode(msynth->parser, pbuf, res, &ev); | |
99 | if (count < 0) | |
100 | break; | |
101 | pbuf += count; | |
102 | res -= count; | |
103 | if (ev.type != SNDRV_SEQ_EVENT_NONE) { | |
104 | ev.source.port = msynth->seq_port; | |
105 | ev.dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; | |
106 | snd_seq_kernel_client_dispatch(msynth->seq_client, &ev, 1, 0); | |
107 | /* clear event and reset header */ | |
108 | memset(&ev, 0, sizeof(ev)); | |
109 | } | |
110 | } | |
111 | } | |
112 | } | |
113 | ||
c7e0b5bf | 114 | static int dump_midi(struct snd_rawmidi_substream *substream, const char *buf, int count) |
1da177e4 | 115 | { |
c7e0b5bf | 116 | struct snd_rawmidi_runtime *runtime; |
1da177e4 LT |
117 | int tmp; |
118 | ||
119 | snd_assert(substream != NULL || buf != NULL, return -EINVAL); | |
120 | runtime = substream->runtime; | |
121 | if ((tmp = runtime->avail) < count) { | |
122 | snd_printd("warning, output event was lost (count = %i, available = %i)\n", count, tmp); | |
123 | return -ENOMEM; | |
124 | } | |
125 | if (snd_rawmidi_kernel_write(substream, buf, count) < count) | |
126 | return -EINVAL; | |
127 | return 0; | |
128 | } | |
129 | ||
c7e0b5bf | 130 | static int event_process_midi(struct snd_seq_event *ev, int direct, |
1da177e4 LT |
131 | void *private_data, int atomic, int hop) |
132 | { | |
c7e0b5bf | 133 | struct seq_midisynth *msynth = private_data; |
1da177e4 | 134 | unsigned char msg[10]; /* buffer for constructing midi messages */ |
c7e0b5bf | 135 | struct snd_rawmidi_substream *substream; |
d06e4c40 | 136 | int len; |
1da177e4 LT |
137 | |
138 | snd_assert(msynth != NULL, return -EINVAL); | |
139 | substream = msynth->output_rfile.output; | |
140 | if (substream == NULL) | |
141 | return -ENODEV; | |
142 | if (ev->type == SNDRV_SEQ_EVENT_SYSEX) { /* special case, to save space */ | |
143 | if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARIABLE) { | |
144 | /* invalid event */ | |
145 | snd_printd("seq_midi: invalid sysex event flags = 0x%x\n", ev->flags); | |
146 | return 0; | |
147 | } | |
d06e4c40 | 148 | snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)dump_midi, substream); |
1da177e4 | 149 | snd_midi_event_reset_decode(msynth->parser); |
1da177e4 LT |
150 | } else { |
151 | if (msynth->parser == NULL) | |
152 | return -EIO; | |
d06e4c40 CL |
153 | len = snd_midi_event_decode(msynth->parser, msg, sizeof(msg), ev); |
154 | if (len < 0) | |
155 | return 0; | |
156 | if (dump_midi(substream, msg, len) < 0) | |
1da177e4 | 157 | snd_midi_event_reset_decode(msynth->parser); |
1da177e4 LT |
158 | } |
159 | return 0; | |
160 | } | |
161 | ||
162 | ||
c7e0b5bf TI |
163 | static int snd_seq_midisynth_new(struct seq_midisynth *msynth, |
164 | struct snd_card *card, | |
1da177e4 LT |
165 | int device, |
166 | int subdevice) | |
167 | { | |
168 | if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &msynth->parser) < 0) | |
169 | return -ENOMEM; | |
170 | msynth->card = card; | |
171 | msynth->device = device; | |
172 | msynth->subdevice = subdevice; | |
173 | return 0; | |
174 | } | |
175 | ||
176 | /* open associated midi device for input */ | |
c7e0b5bf | 177 | static int midisynth_subscribe(void *private_data, struct snd_seq_port_subscribe *info) |
1da177e4 LT |
178 | { |
179 | int err; | |
c7e0b5bf TI |
180 | struct seq_midisynth *msynth = private_data; |
181 | struct snd_rawmidi_runtime *runtime; | |
182 | struct snd_rawmidi_params params; | |
1da177e4 LT |
183 | |
184 | /* open midi port */ | |
f87135f5 CL |
185 | if ((err = snd_rawmidi_kernel_open(msynth->card, msynth->device, |
186 | msynth->subdevice, | |
187 | SNDRV_RAWMIDI_LFLG_INPUT, | |
188 | &msynth->input_rfile)) < 0) { | |
1da177e4 LT |
189 | snd_printd("midi input open failed!!!\n"); |
190 | return err; | |
191 | } | |
192 | runtime = msynth->input_rfile.input->runtime; | |
193 | memset(¶ms, 0, sizeof(params)); | |
194 | params.avail_min = 1; | |
195 | params.buffer_size = input_buffer_size; | |
196 | if ((err = snd_rawmidi_input_params(msynth->input_rfile.input, ¶ms)) < 0) { | |
197 | snd_rawmidi_kernel_release(&msynth->input_rfile); | |
198 | return err; | |
199 | } | |
200 | snd_midi_event_reset_encode(msynth->parser); | |
201 | runtime->event = snd_midi_input_event; | |
202 | runtime->private_data = msynth; | |
203 | snd_rawmidi_kernel_read(msynth->input_rfile.input, NULL, 0); | |
204 | return 0; | |
205 | } | |
206 | ||
207 | /* close associated midi device for input */ | |
c7e0b5bf | 208 | static int midisynth_unsubscribe(void *private_data, struct snd_seq_port_subscribe *info) |
1da177e4 LT |
209 | { |
210 | int err; | |
c7e0b5bf | 211 | struct seq_midisynth *msynth = private_data; |
1da177e4 LT |
212 | |
213 | snd_assert(msynth->input_rfile.input != NULL, return -EINVAL); | |
214 | err = snd_rawmidi_kernel_release(&msynth->input_rfile); | |
215 | return err; | |
216 | } | |
217 | ||
218 | /* open associated midi device for output */ | |
c7e0b5bf | 219 | static int midisynth_use(void *private_data, struct snd_seq_port_subscribe *info) |
1da177e4 LT |
220 | { |
221 | int err; | |
c7e0b5bf TI |
222 | struct seq_midisynth *msynth = private_data; |
223 | struct snd_rawmidi_params params; | |
1da177e4 LT |
224 | |
225 | /* open midi port */ | |
f87135f5 CL |
226 | if ((err = snd_rawmidi_kernel_open(msynth->card, msynth->device, |
227 | msynth->subdevice, | |
228 | SNDRV_RAWMIDI_LFLG_OUTPUT, | |
229 | &msynth->output_rfile)) < 0) { | |
1da177e4 LT |
230 | snd_printd("midi output open failed!!!\n"); |
231 | return err; | |
232 | } | |
233 | memset(¶ms, 0, sizeof(params)); | |
234 | params.avail_min = 1; | |
235 | params.buffer_size = output_buffer_size; | |
236 | if ((err = snd_rawmidi_output_params(msynth->output_rfile.output, ¶ms)) < 0) { | |
237 | snd_rawmidi_kernel_release(&msynth->output_rfile); | |
238 | return err; | |
239 | } | |
240 | snd_midi_event_reset_decode(msynth->parser); | |
241 | return 0; | |
242 | } | |
243 | ||
244 | /* close associated midi device for output */ | |
c7e0b5bf | 245 | static int midisynth_unuse(void *private_data, struct snd_seq_port_subscribe *info) |
1da177e4 | 246 | { |
c7e0b5bf | 247 | struct seq_midisynth *msynth = private_data; |
1da177e4 LT |
248 | unsigned char buf = 0xff; /* MIDI reset */ |
249 | ||
250 | snd_assert(msynth->output_rfile.output != NULL, return -EINVAL); | |
251 | /* sending single MIDI reset message to shut the device up */ | |
252 | snd_rawmidi_kernel_write(msynth->output_rfile.output, &buf, 1); | |
253 | snd_rawmidi_drain_output(msynth->output_rfile.output); | |
254 | return snd_rawmidi_kernel_release(&msynth->output_rfile); | |
255 | } | |
256 | ||
257 | /* delete given midi synth port */ | |
c7e0b5bf | 258 | static void snd_seq_midisynth_delete(struct seq_midisynth *msynth) |
1da177e4 LT |
259 | { |
260 | if (msynth == NULL) | |
261 | return; | |
262 | ||
263 | if (msynth->seq_client > 0) { | |
264 | /* delete port */ | |
265 | snd_seq_event_port_detach(msynth->seq_client, msynth->seq_port); | |
266 | } | |
267 | ||
268 | if (msynth->parser) | |
269 | snd_midi_event_free(msynth->parser); | |
270 | } | |
271 | ||
1da177e4 LT |
272 | /* register new midi synth port */ |
273 | static int | |
c7e0b5bf | 274 | snd_seq_midisynth_register_port(struct snd_seq_device *dev) |
1da177e4 | 275 | { |
c7e0b5bf TI |
276 | struct seq_midisynth_client *client; |
277 | struct seq_midisynth *msynth, *ms; | |
278 | struct snd_seq_port_info *port; | |
279 | struct snd_rawmidi_info *info; | |
a7b928ac | 280 | struct snd_rawmidi *rmidi = dev->private_data; |
1da177e4 LT |
281 | int newclient = 0; |
282 | unsigned int p, ports; | |
c7e0b5bf TI |
283 | struct snd_seq_port_callback pcallbacks; |
284 | struct snd_card *card = dev->card; | |
1da177e4 LT |
285 | int device = dev->device; |
286 | unsigned int input_count = 0, output_count = 0; | |
287 | ||
288 | snd_assert(card != NULL && device >= 0 && device < SNDRV_RAWMIDI_DEVICES, return -EINVAL); | |
289 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
290 | if (! info) | |
291 | return -ENOMEM; | |
292 | info->device = device; | |
293 | info->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
294 | info->subdevice = 0; | |
295 | if (snd_rawmidi_info_select(card, info) >= 0) | |
296 | output_count = info->subdevices_count; | |
297 | info->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
298 | if (snd_rawmidi_info_select(card, info) >= 0) { | |
299 | input_count = info->subdevices_count; | |
300 | } | |
301 | ports = output_count; | |
302 | if (ports < input_count) | |
303 | ports = input_count; | |
304 | if (ports == 0) { | |
305 | kfree(info); | |
306 | return -ENODEV; | |
307 | } | |
308 | if (ports > (256 / SNDRV_RAWMIDI_DEVICES)) | |
309 | ports = 256 / SNDRV_RAWMIDI_DEVICES; | |
310 | ||
1a60d4c5 | 311 | mutex_lock(®ister_mutex); |
1da177e4 LT |
312 | client = synths[card->number]; |
313 | if (client == NULL) { | |
314 | newclient = 1; | |
ecca82b4 | 315 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
1da177e4 | 316 | if (client == NULL) { |
1a60d4c5 | 317 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
318 | kfree(info); |
319 | return -ENOMEM; | |
320 | } | |
7b6d9245 CL |
321 | client->seq_client = |
322 | snd_seq_create_kernel_client( | |
78fc030b AH |
323 | card, 0, "%s", card->shortname[0] ? |
324 | (const char *)card->shortname : "External MIDI"); | |
1da177e4 LT |
325 | if (client->seq_client < 0) { |
326 | kfree(client); | |
1a60d4c5 | 327 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
328 | kfree(info); |
329 | return -ENOMEM; | |
330 | } | |
7b6d9245 | 331 | } |
1da177e4 | 332 | |
c7e0b5bf | 333 | msynth = kcalloc(ports, sizeof(struct seq_midisynth), GFP_KERNEL); |
1da177e4 LT |
334 | port = kmalloc(sizeof(*port), GFP_KERNEL); |
335 | if (msynth == NULL || port == NULL) | |
336 | goto __nomem; | |
337 | ||
338 | for (p = 0; p < ports; p++) { | |
339 | ms = &msynth[p]; | |
340 | ||
341 | if (snd_seq_midisynth_new(ms, card, device, p) < 0) | |
342 | goto __nomem; | |
343 | ||
344 | /* declare port */ | |
345 | memset(port, 0, sizeof(*port)); | |
346 | port->addr.client = client->seq_client; | |
347 | port->addr.port = device * (256 / SNDRV_RAWMIDI_DEVICES) + p; | |
348 | port->flags = SNDRV_SEQ_PORT_FLG_GIVEN_PORT; | |
349 | memset(info, 0, sizeof(*info)); | |
350 | info->device = device; | |
351 | if (p < output_count) | |
352 | info->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
353 | else | |
354 | info->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
355 | info->subdevice = p; | |
356 | if (snd_rawmidi_info_select(card, info) >= 0) | |
357 | strcpy(port->name, info->subname); | |
358 | if (! port->name[0]) { | |
359 | if (info->name[0]) { | |
360 | if (ports > 1) | |
361 | snprintf(port->name, sizeof(port->name), "%s-%d", info->name, p); | |
362 | else | |
363 | snprintf(port->name, sizeof(port->name), "%s", info->name); | |
364 | } else { | |
365 | /* last resort */ | |
366 | if (ports > 1) | |
367 | sprintf(port->name, "MIDI %d-%d-%d", card->number, device, p); | |
368 | else | |
369 | sprintf(port->name, "MIDI %d-%d", card->number, device); | |
370 | } | |
371 | } | |
372 | if ((info->flags & SNDRV_RAWMIDI_INFO_OUTPUT) && p < output_count) | |
373 | port->capability |= SNDRV_SEQ_PORT_CAP_WRITE | SNDRV_SEQ_PORT_CAP_SYNC_WRITE | SNDRV_SEQ_PORT_CAP_SUBS_WRITE; | |
374 | if ((info->flags & SNDRV_RAWMIDI_INFO_INPUT) && p < input_count) | |
375 | port->capability |= SNDRV_SEQ_PORT_CAP_READ | SNDRV_SEQ_PORT_CAP_SYNC_READ | SNDRV_SEQ_PORT_CAP_SUBS_READ; | |
376 | if ((port->capability & (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_READ)) == (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_READ) && | |
377 | info->flags & SNDRV_RAWMIDI_INFO_DUPLEX) | |
378 | port->capability |= SNDRV_SEQ_PORT_CAP_DUPLEX; | |
450047a7 CL |
379 | port->type = SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
380 | | SNDRV_SEQ_PORT_TYPE_HARDWARE | |
381 | | SNDRV_SEQ_PORT_TYPE_PORT; | |
1da177e4 LT |
382 | port->midi_channels = 16; |
383 | memset(&pcallbacks, 0, sizeof(pcallbacks)); | |
384 | pcallbacks.owner = THIS_MODULE; | |
385 | pcallbacks.private_data = ms; | |
386 | pcallbacks.subscribe = midisynth_subscribe; | |
387 | pcallbacks.unsubscribe = midisynth_unsubscribe; | |
388 | pcallbacks.use = midisynth_use; | |
389 | pcallbacks.unuse = midisynth_unuse; | |
390 | pcallbacks.event_input = event_process_midi; | |
391 | port->kernel = &pcallbacks; | |
a7b928ac CL |
392 | if (rmidi->ops && rmidi->ops->get_port_info) |
393 | rmidi->ops->get_port_info(rmidi, p, port); | |
1da177e4 LT |
394 | if (snd_seq_kernel_client_ctl(client->seq_client, SNDRV_SEQ_IOCTL_CREATE_PORT, port)<0) |
395 | goto __nomem; | |
396 | ms->seq_client = client->seq_client; | |
397 | ms->seq_port = port->addr.port; | |
398 | } | |
399 | client->ports_per_device[device] = ports; | |
400 | client->ports[device] = msynth; | |
401 | client->num_ports++; | |
402 | if (newclient) | |
403 | synths[card->number] = client; | |
1a60d4c5 | 404 | mutex_unlock(®ister_mutex); |
51f633da TI |
405 | kfree(info); |
406 | kfree(port); | |
1da177e4 LT |
407 | return 0; /* success */ |
408 | ||
409 | __nomem: | |
410 | if (msynth != NULL) { | |
411 | for (p = 0; p < ports; p++) | |
412 | snd_seq_midisynth_delete(&msynth[p]); | |
413 | kfree(msynth); | |
414 | } | |
415 | if (newclient) { | |
416 | snd_seq_delete_kernel_client(client->seq_client); | |
417 | kfree(client); | |
418 | } | |
419 | kfree(info); | |
420 | kfree(port); | |
1a60d4c5 | 421 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
422 | return -ENOMEM; |
423 | } | |
424 | ||
425 | /* release midi synth port */ | |
426 | static int | |
c7e0b5bf | 427 | snd_seq_midisynth_unregister_port(struct snd_seq_device *dev) |
1da177e4 | 428 | { |
c7e0b5bf TI |
429 | struct seq_midisynth_client *client; |
430 | struct seq_midisynth *msynth; | |
431 | struct snd_card *card = dev->card; | |
1da177e4 LT |
432 | int device = dev->device, p, ports; |
433 | ||
1a60d4c5 | 434 | mutex_lock(®ister_mutex); |
1da177e4 LT |
435 | client = synths[card->number]; |
436 | if (client == NULL || client->ports[device] == NULL) { | |
1a60d4c5 | 437 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
438 | return -ENODEV; |
439 | } | |
440 | ports = client->ports_per_device[device]; | |
441 | client->ports_per_device[device] = 0; | |
442 | msynth = client->ports[device]; | |
443 | client->ports[device] = NULL; | |
1da177e4 LT |
444 | for (p = 0; p < ports; p++) |
445 | snd_seq_midisynth_delete(&msynth[p]); | |
446 | kfree(msynth); | |
1da177e4 LT |
447 | client->num_ports--; |
448 | if (client->num_ports <= 0) { | |
449 | snd_seq_delete_kernel_client(client->seq_client); | |
450 | synths[card->number] = NULL; | |
451 | kfree(client); | |
452 | } | |
1a60d4c5 | 453 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
454 | return 0; |
455 | } | |
456 | ||
457 | ||
458 | static int __init alsa_seq_midi_init(void) | |
459 | { | |
c7e0b5bf | 460 | static struct snd_seq_dev_ops ops = { |
1da177e4 LT |
461 | snd_seq_midisynth_register_port, |
462 | snd_seq_midisynth_unregister_port, | |
463 | }; | |
464 | memset(&synths, 0, sizeof(synths)); | |
465 | snd_seq_autoload_lock(); | |
466 | snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_MIDISYNTH, &ops, 0); | |
467 | snd_seq_autoload_unlock(); | |
468 | return 0; | |
469 | } | |
470 | ||
471 | static void __exit alsa_seq_midi_exit(void) | |
472 | { | |
473 | snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_MIDISYNTH); | |
474 | } | |
475 | ||
476 | module_init(alsa_seq_midi_init) | |
477 | module_exit(alsa_seq_midi_exit) |