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