Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Generic MIDI synth driver for ALSA sequencer |
| 3 | * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl> |
| 4 | * Jaroslav Kysela <perex@suse.cz> |
| 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> |
| 35 | #include <asm/semaphore.h> |
| 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 | |
| 43 | MODULE_AUTHOR("Frank van de Pol <fvdpol@coil.demon.nl>, Jaroslav Kysela <perex@suse.cz>"); |
| 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 */ |
| 54 | typedef struct { |
| 55 | snd_card_t *card; |
| 56 | int device; |
| 57 | int subdevice; |
| 58 | snd_rawmidi_file_t input_rfile; |
| 59 | snd_rawmidi_file_t output_rfile; |
| 60 | int seq_client; |
| 61 | int seq_port; |
| 62 | snd_midi_event_t *parser; |
| 63 | } seq_midisynth_t; |
| 64 | |
| 65 | typedef struct { |
| 66 | int seq_client; |
| 67 | int num_ports; |
| 68 | int ports_per_device[SNDRV_RAWMIDI_DEVICES]; |
| 69 | seq_midisynth_t *ports[SNDRV_RAWMIDI_DEVICES]; |
| 70 | } seq_midisynth_client_t; |
| 71 | |
| 72 | static seq_midisynth_client_t *synths[SNDRV_CARDS]; |
| 73 | static DECLARE_MUTEX(register_mutex); |
| 74 | |
| 75 | /* handle rawmidi input event (MIDI v1.0 stream) */ |
| 76 | static void snd_midi_input_event(snd_rawmidi_substream_t * substream) |
| 77 | { |
| 78 | snd_rawmidi_runtime_t *runtime; |
| 79 | seq_midisynth_t *msynth; |
| 80 | snd_seq_event_t ev; |
| 81 | char buf[16], *pbuf; |
| 82 | long res, count; |
| 83 | |
| 84 | if (substream == NULL) |
| 85 | return; |
| 86 | runtime = substream->runtime; |
| 87 | msynth = (seq_midisynth_t *) runtime->private_data; |
| 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 | |
| 115 | static int dump_midi(snd_rawmidi_substream_t *substream, const char *buf, int count) |
| 116 | { |
| 117 | snd_rawmidi_runtime_t *runtime; |
| 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 | |
| 131 | static int event_process_midi(snd_seq_event_t * ev, int direct, |
| 132 | void *private_data, int atomic, int hop) |
| 133 | { |
| 134 | seq_midisynth_t *msynth = (seq_midisynth_t *) private_data; |
| 135 | unsigned char msg[10]; /* buffer for constructing midi messages */ |
| 136 | snd_rawmidi_substream_t *substream; |
| 137 | int res; |
| 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 | } |
| 149 | res = snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)dump_midi, substream); |
| 150 | snd_midi_event_reset_decode(msynth->parser); |
| 151 | if (res < 0) |
| 152 | return res; |
| 153 | } else { |
| 154 | if (msynth->parser == NULL) |
| 155 | return -EIO; |
| 156 | res = snd_midi_event_decode(msynth->parser, msg, sizeof(msg), ev); |
| 157 | if (res < 0) |
| 158 | return res; |
| 159 | if ((res = dump_midi(substream, msg, res)) < 0) { |
| 160 | snd_midi_event_reset_decode(msynth->parser); |
| 161 | return res; |
| 162 | } |
| 163 | } |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | |
| 168 | static int snd_seq_midisynth_new(seq_midisynth_t *msynth, |
| 169 | snd_card_t *card, |
| 170 | int device, |
| 171 | int subdevice) |
| 172 | { |
| 173 | if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &msynth->parser) < 0) |
| 174 | return -ENOMEM; |
| 175 | msynth->card = card; |
| 176 | msynth->device = device; |
| 177 | msynth->subdevice = subdevice; |
| 178 | return 0; |
| 179 | } |
| 180 | |
| 181 | /* open associated midi device for input */ |
| 182 | static int midisynth_subscribe(void *private_data, snd_seq_port_subscribe_t *info) |
| 183 | { |
| 184 | int err; |
| 185 | seq_midisynth_t *msynth = (seq_midisynth_t *)private_data; |
| 186 | snd_rawmidi_runtime_t *runtime; |
| 187 | snd_rawmidi_params_t params; |
| 188 | |
| 189 | /* open midi port */ |
| 190 | if ((err = snd_rawmidi_kernel_open(msynth->card->number, msynth->device, msynth->subdevice, SNDRV_RAWMIDI_LFLG_INPUT, &msynth->input_rfile)) < 0) { |
| 191 | snd_printd("midi input open failed!!!\n"); |
| 192 | return err; |
| 193 | } |
| 194 | runtime = msynth->input_rfile.input->runtime; |
| 195 | memset(¶ms, 0, sizeof(params)); |
| 196 | params.avail_min = 1; |
| 197 | params.buffer_size = input_buffer_size; |
| 198 | if ((err = snd_rawmidi_input_params(msynth->input_rfile.input, ¶ms)) < 0) { |
| 199 | snd_rawmidi_kernel_release(&msynth->input_rfile); |
| 200 | return err; |
| 201 | } |
| 202 | snd_midi_event_reset_encode(msynth->parser); |
| 203 | runtime->event = snd_midi_input_event; |
| 204 | runtime->private_data = msynth; |
| 205 | snd_rawmidi_kernel_read(msynth->input_rfile.input, NULL, 0); |
| 206 | return 0; |
| 207 | } |
| 208 | |
| 209 | /* close associated midi device for input */ |
| 210 | static int midisynth_unsubscribe(void *private_data, snd_seq_port_subscribe_t *info) |
| 211 | { |
| 212 | int err; |
| 213 | seq_midisynth_t *msynth = (seq_midisynth_t *)private_data; |
| 214 | |
| 215 | snd_assert(msynth->input_rfile.input != NULL, return -EINVAL); |
| 216 | err = snd_rawmidi_kernel_release(&msynth->input_rfile); |
| 217 | return err; |
| 218 | } |
| 219 | |
| 220 | /* open associated midi device for output */ |
| 221 | static int midisynth_use(void *private_data, snd_seq_port_subscribe_t *info) |
| 222 | { |
| 223 | int err; |
| 224 | seq_midisynth_t *msynth = (seq_midisynth_t *)private_data; |
| 225 | snd_rawmidi_params_t params; |
| 226 | |
| 227 | /* open midi port */ |
| 228 | if ((err = snd_rawmidi_kernel_open(msynth->card->number, msynth->device, msynth->subdevice, SNDRV_RAWMIDI_LFLG_OUTPUT, &msynth->output_rfile)) < 0) { |
| 229 | snd_printd("midi output open failed!!!\n"); |
| 230 | return err; |
| 231 | } |
| 232 | memset(¶ms, 0, sizeof(params)); |
| 233 | params.avail_min = 1; |
| 234 | params.buffer_size = output_buffer_size; |
| 235 | if ((err = snd_rawmidi_output_params(msynth->output_rfile.output, ¶ms)) < 0) { |
| 236 | snd_rawmidi_kernel_release(&msynth->output_rfile); |
| 237 | return err; |
| 238 | } |
| 239 | snd_midi_event_reset_decode(msynth->parser); |
| 240 | return 0; |
| 241 | } |
| 242 | |
| 243 | /* close associated midi device for output */ |
| 244 | static int midisynth_unuse(void *private_data, snd_seq_port_subscribe_t *info) |
| 245 | { |
| 246 | seq_midisynth_t *msynth = (seq_midisynth_t *)private_data; |
| 247 | unsigned char buf = 0xff; /* MIDI reset */ |
| 248 | |
| 249 | snd_assert(msynth->output_rfile.output != NULL, return -EINVAL); |
| 250 | /* sending single MIDI reset message to shut the device up */ |
| 251 | snd_rawmidi_kernel_write(msynth->output_rfile.output, &buf, 1); |
| 252 | snd_rawmidi_drain_output(msynth->output_rfile.output); |
| 253 | return snd_rawmidi_kernel_release(&msynth->output_rfile); |
| 254 | } |
| 255 | |
| 256 | /* delete given midi synth port */ |
| 257 | static void snd_seq_midisynth_delete(seq_midisynth_t *msynth) |
| 258 | { |
| 259 | if (msynth == NULL) |
| 260 | return; |
| 261 | |
| 262 | if (msynth->seq_client > 0) { |
| 263 | /* delete port */ |
| 264 | snd_seq_event_port_detach(msynth->seq_client, msynth->seq_port); |
| 265 | } |
| 266 | |
| 267 | if (msynth->parser) |
| 268 | snd_midi_event_free(msynth->parser); |
| 269 | } |
| 270 | |
| 271 | /* set our client name */ |
| 272 | static int set_client_name(seq_midisynth_client_t *client, snd_card_t *card, |
| 273 | snd_rawmidi_info_t *rmidi) |
| 274 | { |
| 275 | snd_seq_client_info_t cinfo; |
| 276 | const char *name; |
| 277 | |
| 278 | memset(&cinfo, 0, sizeof(cinfo)); |
| 279 | cinfo.client = client->seq_client; |
| 280 | cinfo.type = KERNEL_CLIENT; |
| 281 | name = rmidi->name[0] ? (const char *)rmidi->name : "External MIDI"; |
| 282 | strlcpy(cinfo.name, name, sizeof(cinfo.name)); |
| 283 | return snd_seq_kernel_client_ctl(client->seq_client, SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, &cinfo); |
| 284 | } |
| 285 | |
| 286 | /* register new midi synth port */ |
| 287 | static int |
| 288 | snd_seq_midisynth_register_port(snd_seq_device_t *dev) |
| 289 | { |
| 290 | seq_midisynth_client_t *client; |
| 291 | seq_midisynth_t *msynth, *ms; |
| 292 | snd_seq_port_info_t *port; |
| 293 | snd_rawmidi_info_t *info; |
| 294 | int newclient = 0; |
| 295 | unsigned int p, ports; |
| 296 | snd_seq_client_callback_t callbacks; |
| 297 | snd_seq_port_callback_t pcallbacks; |
| 298 | snd_card_t *card = dev->card; |
| 299 | int device = dev->device; |
| 300 | unsigned int input_count = 0, output_count = 0; |
| 301 | |
| 302 | snd_assert(card != NULL && device >= 0 && device < SNDRV_RAWMIDI_DEVICES, return -EINVAL); |
| 303 | info = kmalloc(sizeof(*info), GFP_KERNEL); |
| 304 | if (! info) |
| 305 | return -ENOMEM; |
| 306 | info->device = device; |
| 307 | info->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; |
| 308 | info->subdevice = 0; |
| 309 | if (snd_rawmidi_info_select(card, info) >= 0) |
| 310 | output_count = info->subdevices_count; |
| 311 | info->stream = SNDRV_RAWMIDI_STREAM_INPUT; |
| 312 | if (snd_rawmidi_info_select(card, info) >= 0) { |
| 313 | input_count = info->subdevices_count; |
| 314 | } |
| 315 | ports = output_count; |
| 316 | if (ports < input_count) |
| 317 | ports = input_count; |
| 318 | if (ports == 0) { |
| 319 | kfree(info); |
| 320 | return -ENODEV; |
| 321 | } |
| 322 | if (ports > (256 / SNDRV_RAWMIDI_DEVICES)) |
| 323 | ports = 256 / SNDRV_RAWMIDI_DEVICES; |
| 324 | |
| 325 | down(®ister_mutex); |
| 326 | client = synths[card->number]; |
| 327 | if (client == NULL) { |
| 328 | newclient = 1; |
| 329 | client = kcalloc(1, sizeof(*client), GFP_KERNEL); |
| 330 | if (client == NULL) { |
| 331 | up(®ister_mutex); |
| 332 | kfree(info); |
| 333 | return -ENOMEM; |
| 334 | } |
| 335 | memset(&callbacks, 0, sizeof(callbacks)); |
| 336 | callbacks.private_data = client; |
| 337 | callbacks.allow_input = callbacks.allow_output = 1; |
| 338 | client->seq_client = snd_seq_create_kernel_client(card, 0, &callbacks); |
| 339 | if (client->seq_client < 0) { |
| 340 | kfree(client); |
| 341 | up(®ister_mutex); |
| 342 | kfree(info); |
| 343 | return -ENOMEM; |
| 344 | } |
| 345 | set_client_name(client, card, info); |
| 346 | } else if (device == 0) |
| 347 | set_client_name(client, card, info); /* use the first device's name */ |
| 348 | |
| 349 | msynth = kcalloc(ports, sizeof(seq_midisynth_t), GFP_KERNEL); |
| 350 | port = kmalloc(sizeof(*port), GFP_KERNEL); |
| 351 | if (msynth == NULL || port == NULL) |
| 352 | goto __nomem; |
| 353 | |
| 354 | for (p = 0; p < ports; p++) { |
| 355 | ms = &msynth[p]; |
| 356 | |
| 357 | if (snd_seq_midisynth_new(ms, card, device, p) < 0) |
| 358 | goto __nomem; |
| 359 | |
| 360 | /* declare port */ |
| 361 | memset(port, 0, sizeof(*port)); |
| 362 | port->addr.client = client->seq_client; |
| 363 | port->addr.port = device * (256 / SNDRV_RAWMIDI_DEVICES) + p; |
| 364 | port->flags = SNDRV_SEQ_PORT_FLG_GIVEN_PORT; |
| 365 | memset(info, 0, sizeof(*info)); |
| 366 | info->device = device; |
| 367 | if (p < output_count) |
| 368 | info->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; |
| 369 | else |
| 370 | info->stream = SNDRV_RAWMIDI_STREAM_INPUT; |
| 371 | info->subdevice = p; |
| 372 | if (snd_rawmidi_info_select(card, info) >= 0) |
| 373 | strcpy(port->name, info->subname); |
| 374 | if (! port->name[0]) { |
| 375 | if (info->name[0]) { |
| 376 | if (ports > 1) |
| 377 | snprintf(port->name, sizeof(port->name), "%s-%d", info->name, p); |
| 378 | else |
| 379 | snprintf(port->name, sizeof(port->name), "%s", info->name); |
| 380 | } else { |
| 381 | /* last resort */ |
| 382 | if (ports > 1) |
| 383 | sprintf(port->name, "MIDI %d-%d-%d", card->number, device, p); |
| 384 | else |
| 385 | sprintf(port->name, "MIDI %d-%d", card->number, device); |
| 386 | } |
| 387 | } |
| 388 | if ((info->flags & SNDRV_RAWMIDI_INFO_OUTPUT) && p < output_count) |
| 389 | port->capability |= SNDRV_SEQ_PORT_CAP_WRITE | SNDRV_SEQ_PORT_CAP_SYNC_WRITE | SNDRV_SEQ_PORT_CAP_SUBS_WRITE; |
| 390 | if ((info->flags & SNDRV_RAWMIDI_INFO_INPUT) && p < input_count) |
| 391 | port->capability |= SNDRV_SEQ_PORT_CAP_READ | SNDRV_SEQ_PORT_CAP_SYNC_READ | SNDRV_SEQ_PORT_CAP_SUBS_READ; |
| 392 | if ((port->capability & (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_READ)) == (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_READ) && |
| 393 | info->flags & SNDRV_RAWMIDI_INFO_DUPLEX) |
| 394 | port->capability |= SNDRV_SEQ_PORT_CAP_DUPLEX; |
| 395 | port->type = SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC; |
| 396 | port->midi_channels = 16; |
| 397 | memset(&pcallbacks, 0, sizeof(pcallbacks)); |
| 398 | pcallbacks.owner = THIS_MODULE; |
| 399 | pcallbacks.private_data = ms; |
| 400 | pcallbacks.subscribe = midisynth_subscribe; |
| 401 | pcallbacks.unsubscribe = midisynth_unsubscribe; |
| 402 | pcallbacks.use = midisynth_use; |
| 403 | pcallbacks.unuse = midisynth_unuse; |
| 404 | pcallbacks.event_input = event_process_midi; |
| 405 | port->kernel = &pcallbacks; |
| 406 | if (snd_seq_kernel_client_ctl(client->seq_client, SNDRV_SEQ_IOCTL_CREATE_PORT, port)<0) |
| 407 | goto __nomem; |
| 408 | ms->seq_client = client->seq_client; |
| 409 | ms->seq_port = port->addr.port; |
| 410 | } |
| 411 | client->ports_per_device[device] = ports; |
| 412 | client->ports[device] = msynth; |
| 413 | client->num_ports++; |
| 414 | if (newclient) |
| 415 | synths[card->number] = client; |
| 416 | up(®ister_mutex); |
| 417 | return 0; /* success */ |
| 418 | |
| 419 | __nomem: |
| 420 | if (msynth != NULL) { |
| 421 | for (p = 0; p < ports; p++) |
| 422 | snd_seq_midisynth_delete(&msynth[p]); |
| 423 | kfree(msynth); |
| 424 | } |
| 425 | if (newclient) { |
| 426 | snd_seq_delete_kernel_client(client->seq_client); |
| 427 | kfree(client); |
| 428 | } |
| 429 | kfree(info); |
| 430 | kfree(port); |
| 431 | up(®ister_mutex); |
| 432 | return -ENOMEM; |
| 433 | } |
| 434 | |
| 435 | /* release midi synth port */ |
| 436 | static int |
| 437 | snd_seq_midisynth_unregister_port(snd_seq_device_t *dev) |
| 438 | { |
| 439 | seq_midisynth_client_t *client; |
| 440 | seq_midisynth_t *msynth; |
| 441 | snd_card_t *card = dev->card; |
| 442 | int device = dev->device, p, ports; |
| 443 | |
| 444 | down(®ister_mutex); |
| 445 | client = synths[card->number]; |
| 446 | if (client == NULL || client->ports[device] == NULL) { |
| 447 | up(®ister_mutex); |
| 448 | return -ENODEV; |
| 449 | } |
| 450 | ports = client->ports_per_device[device]; |
| 451 | client->ports_per_device[device] = 0; |
| 452 | msynth = client->ports[device]; |
| 453 | client->ports[device] = NULL; |
| 454 | snd_runtime_check(msynth != NULL || ports <= 0, goto __skip); |
| 455 | for (p = 0; p < ports; p++) |
| 456 | snd_seq_midisynth_delete(&msynth[p]); |
| 457 | kfree(msynth); |
| 458 | __skip: |
| 459 | client->num_ports--; |
| 460 | if (client->num_ports <= 0) { |
| 461 | snd_seq_delete_kernel_client(client->seq_client); |
| 462 | synths[card->number] = NULL; |
| 463 | kfree(client); |
| 464 | } |
| 465 | up(®ister_mutex); |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | |
| 470 | static int __init alsa_seq_midi_init(void) |
| 471 | { |
| 472 | static snd_seq_dev_ops_t ops = { |
| 473 | snd_seq_midisynth_register_port, |
| 474 | snd_seq_midisynth_unregister_port, |
| 475 | }; |
| 476 | memset(&synths, 0, sizeof(synths)); |
| 477 | snd_seq_autoload_lock(); |
| 478 | snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_MIDISYNTH, &ops, 0); |
| 479 | snd_seq_autoload_unlock(); |
| 480 | return 0; |
| 481 | } |
| 482 | |
| 483 | static void __exit alsa_seq_midi_exit(void) |
| 484 | { |
| 485 | snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_MIDISYNTH); |
| 486 | } |
| 487 | |
| 488 | module_init(alsa_seq_midi_init) |
| 489 | module_exit(alsa_seq_midi_exit) |