aboutsummaryrefslogtreecommitdiff
path: root/sound/core/seq/seq_instr.c
blob: 5b40ea2ba8f4f9aaff3f3cbd3aad60fc16510b7a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
/*
 *   Generic Instrument routines for ALSA sequencer
 *   Copyright (c) 1999 by Jaroslav Kysela <perex@suse.cz>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */
 
#include <sound/driver.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <sound/core.h>
#include "seq_clientmgr.h"
#include <sound/seq_instr.h>
#include <sound/initval.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer instrument library.");
MODULE_LICENSE("GPL");


static void snd_instr_lock_ops(snd_seq_kinstr_list_t *list)
{
	if (!(list->flags & SNDRV_SEQ_INSTR_FLG_DIRECT)) {
		spin_lock_irqsave(&list->ops_lock, list->ops_flags);
	} else {
		down(&list->ops_mutex);
	}
}

static void snd_instr_unlock_ops(snd_seq_kinstr_list_t *list)
{
	if (!(list->flags & SNDRV_SEQ_INSTR_FLG_DIRECT)) {
		spin_unlock_irqrestore(&list->ops_lock, list->ops_flags);
	} else {
		up(&list->ops_mutex);
	}
}

static snd_seq_kinstr_t *snd_seq_instr_new(int add_len, int atomic)
{
	snd_seq_kinstr_t *instr;
	
	instr = kcalloc(1, sizeof(snd_seq_kinstr_t) + add_len, atomic ? GFP_ATOMIC : GFP_KERNEL);
	if (instr == NULL)
		return NULL;
	instr->add_len = add_len;
	return instr;
}

static int snd_seq_instr_free(snd_seq_kinstr_t *instr, int atomic)
{
	int result = 0;

	if (instr == NULL)
		return -EINVAL;
	if (instr->ops && instr->ops->remove)
		result = instr->ops->remove(instr->ops->private_data, instr, 1);
	if (!result)
		kfree(instr);
	return result;
}

snd_seq_kinstr_list_t *snd_seq_instr_list_new(void)
{
	snd_seq_kinstr_list_t *list;

	list = kcalloc(1, sizeof(snd_seq_kinstr_list_t), GFP_KERNEL);
	if (list == NULL)
		return NULL;
	spin_lock_init(&list->lock);
	spin_lock_init(&list->ops_lock);
	init_MUTEX(&list->ops_mutex);
	list->owner = -1;
	return list;
}

void snd_seq_instr_list_free(snd_seq_kinstr_list_t **list_ptr)
{
	snd_seq_kinstr_list_t *list;
	snd_seq_kinstr_t *instr;
	snd_seq_kcluster_t *cluster;
	int idx;
	unsigned long flags;

	if (list_ptr == NULL)
		return;
	list = *list_ptr;
	*list_ptr = NULL;
	if (list == NULL)
		return;
	
	for (idx = 0; idx < SNDRV_SEQ_INSTR_HASH_SIZE; idx++) {		
		while ((instr = list->hash[idx]) != NULL) {
			list->hash[idx] = instr->next;
			list->count--;
			spin_lock_irqsave(&list->lock, flags);
			while (instr->use) {
				spin_unlock_irqrestore(&list->lock, flags);
				set_current_state(TASK_INTERRUPTIBLE);
				schedule_timeout(1);
				spin_lock_irqsave(&list->lock, flags);
			}				
			spin_unlock_irqrestore(&list->lock, flags);
			if (snd_seq_instr_free(instr, 0)<0)
				snd_printk(KERN_WARNING "instrument free problem\n");
		}
		while ((cluster = list->chash[idx]) != NULL) {
			list->chash[idx] = cluster->next;
			list->ccount--;
			kfree(cluster);
		}
	}
	kfree(list);
}

static int instr_free_compare(snd_seq_kinstr_t *instr,
			      snd_seq_instr_header_t *ifree,
			      unsigned int client)
{
	switch (ifree->cmd) {
	case SNDRV_SEQ_INSTR_FREE_CMD_ALL:
		/* all, except private for other clients */
		if ((instr->instr.std & 0xff000000) == 0)
			return 0;
		if (((instr->instr.std >> 24) & 0xff) == client)
			return 0;
		return 1;
	case SNDRV_SEQ_INSTR_FREE_CMD_PRIVATE:
		/* all my private instruments */
		if ((instr->instr.std & 0xff000000) == 0)
			return 1;
		if (((instr->instr.std >> 24) & 0xff) == client)
			return 0;
		return 1;
	case SNDRV_SEQ_INSTR_FREE_CMD_CLUSTER:
		/* all my private instruments */
		if ((instr->instr.std & 0xff000000) == 0) {
			if (instr->instr.cluster == ifree->id.cluster)
				return 0;
			return 1;
		}
		if (((instr->instr.std >> 24) & 0xff) == client) {
			if (instr->instr.cluster == ifree->id.cluster)
				return 0;
		}
		return 1;
	}
	return 1;
}

int snd_seq_instr_list_free_cond(snd_seq_kinstr_list_t *list,
			         snd_seq_instr_header_t *ifree,
			         int client,
			         int atomic)
{
	snd_seq_kinstr_t *instr, *prev, *next, *flist;
	int idx;
	unsigned long flags;

	snd_instr_lock_ops(list);
	for (idx = 0; idx < SNDRV_SEQ_INSTR_HASH_SIZE; idx++) {
		spin_lock_irqsave(&list->lock, flags);
		instr = list->hash[idx];
		prev = flist = NULL;
		while (instr) {
			while (instr && instr_free_compare(instr, ifree, (unsigned int)client)) {
				prev = instr;
				instr = instr->next;
			}
			if (instr == NULL)
				continue;
			if (instr->ops && instr->ops->notify)
				instr->ops->notify(instr->ops->private_data, instr, SNDRV_SEQ_INSTR_NOTIFY_REMOVE);
			next = instr->next;
			if (prev == NULL) {
				list->hash[idx] = next;
			} else {
				prev->next = next;
			}
			list->count--;
			instr->next = flist;
			flist = instr;
			instr = next;
		}
		spin_unlock_irqrestore(&list->lock, flags);
		while (flist) {
			instr = flist;
			flist = instr->next;
			while (instr->use) {
				set_current_state(TASK_INTERRUPTIBLE);
				schedule_timeout(1);
			}				
			if (snd_seq_instr_free(instr, atomic)<0)
				snd_printk(KERN_WARNING "instrument free problem\n");
			instr = next;
		}
	}
	snd_instr_unlock_ops(list);
	return 0;	
}

static int compute_hash_instr_key(snd_seq_instr_t *instr)
{
	int result;
	
	result = instr->bank | (instr->prg << 16);
	result += result >> 24;
	result += result >> 16;
	result += result >> 8;
	return result & (SNDRV_SEQ_INSTR_HASH_SIZE-1);
}

#if 0
static int compute_hash_cluster_key(snd_seq_instr_cluster_t cluster)
{
	int result;
	
	result = cluster;
	result += result >> 24;
	result += result >> 16;
	result += result >> 8;
	return result & (SNDRV_SEQ_INSTR_HASH_SIZE-1);
}
#endif

static int compare_instr(snd_seq_instr_t *i1, snd_seq_instr_t *i2, int exact)
{
	if (exact) {
		if (i1->cluster != i2->cluster ||
		    i1->bank != i2->bank ||
		    i1->prg != i2->prg)
			return 1;
		if ((i1->std & 0xff000000) != (i2->std & 0xff000000))
			return 1;
		if (!(i1->std & i2->std))
			return 1;
		return 0;
	} else {
		unsigned int client_check;
		
		if (i2->cluster && i1->cluster != i2->cluster)
			return 1;
		client_check = i2->std & 0xff000000;
		if (client_check) {
			if ((i1->std & 0xff000000) != client_check)
				return 1;
		} else {
			if ((i1->std & i2->std) != i2->std)
				return 1;
		}
		return i1->bank != i2->bank || i1->prg != i2->prg;
	}
}

snd_seq_kinstr_t *snd_seq_instr_find(snd_seq_kinstr_list_t *list,
				     snd_seq_instr_t *instr,
				     int exact,
				     int follow_alias)
{
	unsigned long flags;
	int depth = 0;
	snd_seq_kinstr_t *result;

	if (list == NULL || instr == NULL)
		return NULL;
	spin_lock_irqsave(&list->lock, flags);
      __again:
	result = list->hash[compute_hash_instr_key(instr)];
	while (result) {
		if (!compare_instr(&result->instr, instr, exact)) {
			if (follow_alias && (result->type == SNDRV_SEQ_INSTR_ATYPE_ALIAS)) {
				instr = (snd_seq_instr_t *)KINSTR_DATA(result);
				if (++depth > 10)
					goto __not_found;
				goto __again;
			}
			result->use++;
			spin_unlock_irqrestore(&list->lock, flags);
			return result;
		}
		result = result->next;
	}
      __not_found:
	spin_unlock_irqrestore(&list->lock, flags);
	return NULL;
}

void snd_seq_instr_free_use(snd_seq_kinstr_list_t *list,
			    snd_seq_kinstr_t *instr)
{
	unsigned long flags;

	if (list == NULL || instr == NULL)
		return;
	spin_lock_irqsave(&list->lock, flags);
	if (instr->use <= 0) {
		snd_printk(KERN_ERR "free_use: fatal!!! use = %i, name = '%s'\n", instr->use, instr->name);
	} else {
		instr->use--;
	}
	spin_unlock_irqrestore(&list->lock, flags);
}

static snd_seq_kinstr_ops_t *instr_ops(snd_seq_kinstr_ops_t *ops, char *instr_type)
{
	while (ops) {
		if (!strcmp(ops->instr_type, instr_type))
			return ops;
		ops = ops->next;
	}
	return NULL;
}

static int instr_result(snd_seq_event_t *ev,
			int type, int result,
			int atomic)
{
	snd_seq_event_t sev;
	
	memset(&sev, 0, sizeof(sev));
	sev.type = SNDRV_SEQ_EVENT_RESULT;
	sev.flags = SNDRV_SEQ_TIME_STAMP_REAL | SNDRV_SEQ_EVENT_LENGTH_FIXED |
	            SNDRV_SEQ_PRIORITY_NORMAL;
	sev.source = ev->dest;
	sev.dest = ev->source;
	sev.data.result.event = type;
	sev.data.result.result = result;
#if 0
	printk("instr result - type = %i, result = %i, queue = %i, source.client:port = %i:%i, dest.client:port = %i:%i\n",
				type, result,
				sev.queue,
				sev.source.client, sev.source.port,
				sev.dest.client, sev.dest.port);
#endif
	return snd_seq_kernel_client_dispatch(sev.source.client, &sev, atomic, 0);
}

static int instr_begin(snd_seq_kinstr_ops_t *ops,
		       snd_seq_kinstr_list_t *list,
		       snd_seq_event_t *ev,
		       int atomic, int hop)
{
	unsigned long flags;

	spin_lock_irqsave(&list->lock, flags);
	if (list->owner >= 0 && list->owner != ev->source.client) {
		spin_unlock_irqrestore(&list->lock, flags);
		return instr_result(ev, SNDRV_SEQ_EVENT_INSTR_BEGIN, -EBUSY, atomic);
	}
	list->owner = ev->source.client;
	spin_unlock_irqrestore(&list->lock, flags);
	return instr_result(ev, SNDRV_SEQ_EVENT_INSTR_BEGIN, 0, atomic);
}

static int instr_end(snd_seq_kinstr_ops_t *ops,
		     snd_seq_kinstr_list_t *list,
		     snd_seq_event_t *ev,
		     int atomic, int hop)
{
	unsigned long flags;

	/* TODO: timeout handling */
	spin_lock_irqsave(&list->lock, flags);
	if (list->owner == ev->source.client) {
		list->owner = -1;
		spin_unlock_irqrestore(&list->lock, flags);
		return instr_result(ev, SNDRV_SEQ_EVENT_INSTR_END, 0, atomic);
	}
	spin_unlock_irqrestore(&list->lock, flags);
	return instr_result(ev, SNDRV_SEQ_EVENT_INSTR_END, -EINVAL, atomic);
}

static int instr_info(snd_seq_kinstr_ops_t *ops,
		      snd_seq_kinstr_list_t *list,
		      snd_seq_event_t *ev,
		      int atomic, int hop)
{
	return -ENXIO;
}

static int instr_format_info(snd_seq_kinstr_ops_t *ops,
			     snd_seq_kinstr_list_t *list,
			     snd_seq_event_t *ev,
			     int atomic, int hop)
{
	return -ENXIO;
}

static int instr_reset(snd_seq_kinstr_ops_t *ops,
		       snd_seq_kinstr_list_t *list,
		       snd_seq_event_t *ev,
		       int atomic, int hop)
{
	return -ENXIO;
}

static int instr_status(snd_seq_kinstr_ops_t *ops,
			snd_seq_kinstr_list_t *list,
			snd_seq_event_t *ev,
			int atomic, int hop)
{
	return -ENXIO;
}

static int instr_put(snd_seq_kinstr_ops_t *ops,
		     snd_seq_kinstr_list_t *list,
		     snd_seq_event_t *ev,
		     int atomic, int hop)
{
	unsigned long flags;
	snd_seq_instr_header_t put;
	snd_seq_kinstr_t *instr;
	int result = -EINVAL, len, key;

	if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARUSR)
		goto __return;

	if (ev->data.ext.len < sizeof(snd_seq_instr_header_t))
		goto __return;
	if (copy_from_user(&put, (void __user *)ev->data.ext.ptr, sizeof(snd_seq_instr_header_t))) {
		result = -EFAULT;
		goto __return;
	}
	snd_instr_lock_ops(list);
	if (put.id.instr.std & 0xff000000) {	/* private instrument */
		put.id.instr.std &= 0x00ffffff;
		put.id.instr.std |= (unsigned int)ev->source.client << 24;
	}
	if ((instr = snd_seq_instr_find(list, &put.id.instr, 1, 0))) {
		snd_seq_instr_free_use(list, instr);
		snd_instr_unlock_ops(list);
		result = -EBUSY;
		goto __return;
	}
	ops = instr_ops(ops, put.data.data.format);
	if (ops == NULL) {
		snd_instr_unlock_ops(list);
		goto __return;
	}
	len = ops->add_len;
	if (put.data.type == SNDRV_SEQ_INSTR_ATYPE_ALIAS)
		len = sizeof(snd_seq_instr_t);
	instr = snd_seq_instr_new(len, atomic);
	if (instr == NULL) {
		snd_instr_unlock_ops(list);
		result = -ENOMEM;
		goto __return;
	}
	instr->ops = ops;
	instr->instr = put.id.instr;
	strlcpy(instr->name, put.data.name, sizeof(instr->name));
	instr->type = put.data.type;
	if (instr->type == SNDRV_SEQ_INSTR_ATYPE_DATA) {
		result = ops->put(ops->private_data,
				  instr,
				  (void __user *)ev->data.ext.ptr + sizeof(snd_seq_instr_header_t),
				  ev->data.ext.len - sizeof(snd_seq_instr_header_t),
				  atomic,
				  put.cmd);
		if (result < 0) {
			snd_seq_instr_free(instr, atomic);
			snd_instr_unlock_ops(list);
			goto __return;
		}
	}
	key = compute_hash_instr_key(&instr->instr);
	spin_lock_irqsave(&list->lock, flags);
	instr->next = list->hash[key];
	list->hash[key] = instr;
	list->count++;
	spin_unlock_irqrestore(&list->lock, flags);
	snd_instr_unlock_ops(list);
	result = 0;
      __return:
	instr_result(ev, SNDRV_SEQ_EVENT_INSTR_PUT, result, atomic);
	return result;
}

static int instr_get(snd_seq_kinstr_ops_t *ops,
		     snd_seq_kinstr_list_t *list,
		     snd_seq_event_t *ev,
		     int atomic, int hop)
{
	return -ENXIO;
}

static int instr_free(snd_seq_kinstr_ops_t *ops,
		      snd_seq_kinstr_list_t *list,
		      snd_seq_event_t *ev,
		      int atomic, int hop)
{
	snd_seq_instr_header_t ifree;
	snd_seq_kinstr_t *instr, *prev;
	int result = -EINVAL;
	unsigned long flags;
	unsigned int hash;

	if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARUSR)
		goto __return;

	if (ev->data.ext.len < sizeof(snd_seq_instr_header_t))
		goto __return;
	if (copy_from_user(&ifree, (void __user *)ev->data.ext.ptr, sizeof(snd_seq_instr_header_t))) {
		result = -EFAULT;
		goto __return;
	}
	if (ifree.cmd == SNDRV_SEQ_INSTR_FREE_CMD_ALL ||
	    ifree.cmd == SNDRV_SEQ_INSTR_FREE_CMD_PRIVATE ||
	    ifree.cmd == SNDRV_SEQ_INSTR_FREE_CMD_CLUSTER) {
	    	result = snd_seq_instr_list_free_cond(list, &ifree, ev->dest.client, atomic);
	    	goto __return;
	}
	if (ifree.cmd == SNDRV_SEQ_INSTR_FREE_CMD_SINGLE) {
		if (ifree.id.instr.std & 0xff000000) {
			ifree.id.instr.std &= 0x00ffffff;
			ifree.id.instr.std |= (unsigned int)ev->source.client << 24;
		}
		hash = compute_hash_instr_key(&ifree.id.instr);
		snd_instr_lock_ops(list);
		spin_lock_irqsave(&list->lock, flags);
		instr = list->hash[hash];
		prev = NULL;
		while (instr) {
			if (!compare_instr(&instr->instr, &ifree.id.instr, 1))
				goto __free_single;
			prev = instr;
			instr = instr->next;
		}
		result = -ENOENT;
		spin_unlock_irqrestore(&list->lock, flags);
		snd_instr_unlock_ops(list);
		goto __return;
		
	      __free_single:
		if (prev) {
			prev->next = instr->next;
		} else {
			list->hash[hash] = instr->next;
		}
		if (instr->ops && instr->ops->notify)
			instr->ops->notify(instr->ops->private_data, instr, SNDRV_SEQ_INSTR_NOTIFY_REMOVE);
		while (instr->use) {
			spin_unlock_irqrestore(&list->lock, flags);
			set_current_state(TASK_INTERRUPTIBLE);
			schedule_timeout(1);
			spin_lock_irqsave(&list->lock, flags);
		}				
		spin_unlock_irqrestore(&list->lock, flags);
		result = snd_seq_instr_free(instr, atomic);
		snd_instr_unlock_ops(list);
		goto __return;
	}

      __return:
	instr_result(ev, SNDRV_SEQ_EVENT_INSTR_FREE, result, atomic);
	return result;
}

static int instr_list(snd_seq_kinstr_ops_t *ops,
		      snd_seq_kinstr_list_t *list,
		      snd_seq_event_t *ev,
		      int atomic, int hop)
{
	return -ENXIO;
}

static int instr_cluster(snd_seq_kinstr_ops_t *ops,
			 snd_seq_kinstr_list_t *list,
			 snd_seq_event_t *ev,
			 int atomic, int hop)
{
	return -ENXIO;
}

int snd_seq_instr_event(snd_seq_kinstr_ops_t *ops,
			snd_seq_kinstr_list_t *list,
			snd_seq_event_t *ev,
			int client,
			int atomic,
			int hop)
{
	int direct = 0;

	snd_assert(ops != NULL && list != NULL && ev != NULL, return -EINVAL);
	if (snd_seq_ev_is_direct(ev)) {
		direct = 1;
		switch (ev->type) {
		case SNDRV_SEQ_EVENT_INSTR_BEGIN:
			return instr_begin(ops, list, ev, atomic, hop);
		case SNDRV_SEQ_EVENT_INSTR_END:
			return instr_end(ops, list, ev, atomic, hop);
		}
	}
	if ((list->flags & SNDRV_SEQ_INSTR_FLG_DIRECT) && !direct)
		return -EINVAL;
	switch (ev->type) {
	case SNDRV_SEQ_EVENT_INSTR_INFO:
		return instr_info(ops, list, ev, atomic, hop);
	case SNDRV_SEQ_EVENT_INSTR_FINFO:
		return instr_format_info(ops, list, ev, atomic, hop);
	case SNDRV_SEQ_EVENT_INSTR_RESET:
		return instr_reset(ops, list, ev, atomic, hop);
	case SNDRV_SEQ_EVENT_INSTR_STATUS:
		return instr_status(ops, list, ev, atomic, hop);
	case SNDRV_SEQ_EVENT_INSTR_PUT:
		return instr_put(ops, list, ev, atomic, hop);
	case SNDRV_SEQ_EVENT_INSTR_GET:
		return instr_get(ops, list, ev, atomic, hop);
	case SNDRV_SEQ_EVENT_INSTR_FREE:
		return instr_free(ops, list, ev, atomic, hop);
	case SNDRV_SEQ_EVENT_INSTR_LIST:
		return instr_list(ops, list, ev, atomic, hop);
	case SNDRV_SEQ_EVENT_INSTR_CLUSTER:
		return instr_cluster(ops, list, ev, atomic, hop);
	}
	return -EINVAL;
}
			
/*
 *  Init part
 */

static int __init alsa_seq_instr_init(void)
{
	return 0;
}

static void __exit alsa_seq_instr_exit(void)
{
}

module_init(alsa_seq_instr_init)
module_exit(alsa_seq_instr_exit)

EXPORT_SYMBOL(snd_seq_instr_list_new);
EXPORT_SYMBOL(snd_seq_instr_list_free);
EXPORT_SYMBOL(snd_seq_instr_list_free_cond);
EXPORT_SYMBOL(snd_seq_instr_find);
EXPORT_SYMBOL(snd_seq_instr_free_use);
EXPORT_SYMBOL(snd_seq_instr_event);