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23#include <sound/asoundef.h>
24#include "seq_oss_midi.h"
25#include "seq_oss_readq.h"
26#include "seq_oss_timer.h"
27#include "seq_oss_event.h"
28#include <sound/seq_midi_event.h>
29#include "../seq_lock.h"
30#include <linux/init.h>
31
32
33
34
35
36#define SNDRV_SEQ_OSS_MAX_MIDI_NAME 30
37
38
39
40
41struct seq_oss_midi {
42 int seq_device;
43 int client;
44 int port;
45 unsigned int flags;
46 int opened;
47 unsigned char name[SNDRV_SEQ_OSS_MAX_MIDI_NAME];
48 struct snd_midi_event *coder;
49 struct seq_oss_devinfo *devinfo;
50 snd_use_lock_t use_lock;
51};
52
53
54
55
56
57static int max_midi_devs;
58static struct seq_oss_midi *midi_devs[SNDRV_SEQ_OSS_MAX_MIDI_DEVS];
59
60static DEFINE_SPINLOCK(register_lock);
61
62
63
64
65static struct seq_oss_midi *get_mdev(int dev);
66static struct seq_oss_midi *get_mididev(struct seq_oss_devinfo *dp, int dev);
67static int send_synth_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int dev);
68static int send_midi_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, struct seq_oss_midi *mdev);
69
70
71
72
73
74int __init
75snd_seq_oss_midi_lookup_ports(int client)
76{
77 struct snd_seq_client_info *clinfo;
78 struct snd_seq_port_info *pinfo;
79
80 clinfo = kzalloc(sizeof(*clinfo), GFP_KERNEL);
81 pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL);
82 if (! clinfo || ! pinfo) {
83 kfree(clinfo);
84 kfree(pinfo);
85 return -ENOMEM;
86 }
87 clinfo->client = -1;
88 while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, clinfo) == 0) {
89 if (clinfo->client == client)
90 continue;
91 pinfo->addr.client = clinfo->client;
92 pinfo->addr.port = -1;
93 while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, pinfo) == 0)
94 snd_seq_oss_midi_check_new_port(pinfo);
95 }
96 kfree(clinfo);
97 kfree(pinfo);
98 return 0;
99}
100
101
102
103
104static struct seq_oss_midi *
105get_mdev(int dev)
106{
107 struct seq_oss_midi *mdev;
108 unsigned long flags;
109
110 spin_lock_irqsave(®ister_lock, flags);
111 mdev = midi_devs[dev];
112 if (mdev)
113 snd_use_lock_use(&mdev->use_lock);
114 spin_unlock_irqrestore(®ister_lock, flags);
115 return mdev;
116}
117
118
119
120
121static struct seq_oss_midi *
122find_slot(int client, int port)
123{
124 int i;
125 struct seq_oss_midi *mdev;
126 unsigned long flags;
127
128 spin_lock_irqsave(®ister_lock, flags);
129 for (i = 0; i < max_midi_devs; i++) {
130 mdev = midi_devs[i];
131 if (mdev && mdev->client == client && mdev->port == port) {
132
133 snd_use_lock_use(&mdev->use_lock);
134 spin_unlock_irqrestore(®ister_lock, flags);
135 return mdev;
136 }
137 }
138 spin_unlock_irqrestore(®ister_lock, flags);
139 return NULL;
140}
141
142
143#define PERM_WRITE (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE)
144#define PERM_READ (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ)
145
146
147
148int
149snd_seq_oss_midi_check_new_port(struct snd_seq_port_info *pinfo)
150{
151 int i;
152 struct seq_oss_midi *mdev;
153 unsigned long flags;
154
155 debug_printk(("check for MIDI client %d port %d\n", pinfo->addr.client, pinfo->addr.port));
156
157 if (! (pinfo->type & SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC))
158 return 0;
159
160 if ((pinfo->capability & PERM_WRITE) != PERM_WRITE &&
161 (pinfo->capability & PERM_READ) != PERM_READ)
162 return 0;
163
164
165
166
167 if ((mdev = find_slot(pinfo->addr.client, pinfo->addr.port)) != NULL) {
168
169 snd_use_lock_free(&mdev->use_lock);
170 return 0;
171 }
172
173
174
175
176 if ((mdev = kzalloc(sizeof(*mdev), GFP_KERNEL)) == NULL) {
177 snd_printk(KERN_ERR "can't malloc midi info\n");
178 return -ENOMEM;
179 }
180
181
182 mdev->client = pinfo->addr.client;
183 mdev->port = pinfo->addr.port;
184 mdev->flags = pinfo->capability;
185 mdev->opened = 0;
186 snd_use_lock_init(&mdev->use_lock);
187
188
189 strlcpy(mdev->name, pinfo->name, sizeof(mdev->name));
190
191
192 if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &mdev->coder) < 0) {
193 snd_printk(KERN_ERR "can't malloc midi coder\n");
194 kfree(mdev);
195 return -ENOMEM;
196 }
197
198 snd_midi_event_no_status(mdev->coder, 1);
199
200
201
202
203 spin_lock_irqsave(®ister_lock, flags);
204 for (i = 0; i < max_midi_devs; i++) {
205 if (midi_devs[i] == NULL)
206 break;
207 }
208 if (i >= max_midi_devs) {
209 if (max_midi_devs >= SNDRV_SEQ_OSS_MAX_MIDI_DEVS) {
210 spin_unlock_irqrestore(®ister_lock, flags);
211 snd_midi_event_free(mdev->coder);
212 kfree(mdev);
213 return -ENOMEM;
214 }
215 max_midi_devs++;
216 }
217 mdev->seq_device = i;
218 midi_devs[mdev->seq_device] = mdev;
219 spin_unlock_irqrestore(®ister_lock, flags);
220
221 return 0;
222}
223
224
225
226
227int
228snd_seq_oss_midi_check_exit_port(int client, int port)
229{
230 struct seq_oss_midi *mdev;
231 unsigned long flags;
232 int index;
233
234 if ((mdev = find_slot(client, port)) != NULL) {
235 spin_lock_irqsave(®ister_lock, flags);
236 midi_devs[mdev->seq_device] = NULL;
237 spin_unlock_irqrestore(®ister_lock, flags);
238 snd_use_lock_free(&mdev->use_lock);
239 snd_use_lock_sync(&mdev->use_lock);
240 if (mdev->coder)
241 snd_midi_event_free(mdev->coder);
242 kfree(mdev);
243 }
244 spin_lock_irqsave(®ister_lock, flags);
245 for (index = max_midi_devs - 1; index >= 0; index--) {
246 if (midi_devs[index])
247 break;
248 }
249 max_midi_devs = index + 1;
250 spin_unlock_irqrestore(®ister_lock, flags);
251 return 0;
252}
253
254
255
256
257
258void
259snd_seq_oss_midi_clear_all(void)
260{
261 int i;
262 struct seq_oss_midi *mdev;
263 unsigned long flags;
264
265 spin_lock_irqsave(®ister_lock, flags);
266 for (i = 0; i < max_midi_devs; i++) {
267 if ((mdev = midi_devs[i]) != NULL) {
268 if (mdev->coder)
269 snd_midi_event_free(mdev->coder);
270 kfree(mdev);
271 midi_devs[i] = NULL;
272 }
273 }
274 max_midi_devs = 0;
275 spin_unlock_irqrestore(®ister_lock, flags);
276}
277
278
279
280
281
282void
283snd_seq_oss_midi_setup(struct seq_oss_devinfo *dp)
284{
285 dp->max_mididev = max_midi_devs;
286}
287
288
289
290
291void
292snd_seq_oss_midi_cleanup(struct seq_oss_devinfo *dp)
293{
294 int i;
295 for (i = 0; i < dp->max_mididev; i++)
296 snd_seq_oss_midi_close(dp, i);
297 dp->max_mididev = 0;
298}
299
300
301
302
303
304void
305snd_seq_oss_midi_open_all(struct seq_oss_devinfo *dp, int file_mode)
306{
307 int i;
308 for (i = 0; i < dp->max_mididev; i++)
309 snd_seq_oss_midi_open(dp, i, file_mode);
310}
311
312
313
314
315
316static struct seq_oss_midi *
317get_mididev(struct seq_oss_devinfo *dp, int dev)
318{
319 if (dev < 0 || dev >= dp->max_mididev)
320 return NULL;
321 return get_mdev(dev);
322}
323
324
325
326
327
328int
329snd_seq_oss_midi_open(struct seq_oss_devinfo *dp, int dev, int fmode)
330{
331 int perm;
332 struct seq_oss_midi *mdev;
333 struct snd_seq_port_subscribe subs;
334
335 if ((mdev = get_mididev(dp, dev)) == NULL)
336 return -ENODEV;
337
338
339 if (mdev->opened && mdev->devinfo != dp) {
340 snd_use_lock_free(&mdev->use_lock);
341 return -EBUSY;
342 }
343
344 perm = 0;
345 if (is_write_mode(fmode))
346 perm |= PERM_WRITE;
347 if (is_read_mode(fmode))
348 perm |= PERM_READ;
349 perm &= mdev->flags;
350 if (perm == 0) {
351 snd_use_lock_free(&mdev->use_lock);
352 return -ENXIO;
353 }
354
355
356 if ((mdev->opened & perm) == perm) {
357 snd_use_lock_free(&mdev->use_lock);
358 return 0;
359 }
360
361 perm &= ~mdev->opened;
362
363 memset(&subs, 0, sizeof(subs));
364
365 if (perm & PERM_WRITE) {
366 subs.sender = dp->addr;
367 subs.dest.client = mdev->client;
368 subs.dest.port = mdev->port;
369 if (snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs) >= 0)
370 mdev->opened |= PERM_WRITE;
371 }
372 if (perm & PERM_READ) {
373 subs.sender.client = mdev->client;
374 subs.sender.port = mdev->port;
375 subs.dest = dp->addr;
376 subs.flags = SNDRV_SEQ_PORT_SUBS_TIMESTAMP;
377 subs.queue = dp->queue;
378 if (snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs) >= 0)
379 mdev->opened |= PERM_READ;
380 }
381
382 if (! mdev->opened) {
383 snd_use_lock_free(&mdev->use_lock);
384 return -ENXIO;
385 }
386
387 mdev->devinfo = dp;
388 snd_use_lock_free(&mdev->use_lock);
389 return 0;
390}
391
392
393
394
395int
396snd_seq_oss_midi_close(struct seq_oss_devinfo *dp, int dev)
397{
398 struct seq_oss_midi *mdev;
399 struct snd_seq_port_subscribe subs;
400
401 if ((mdev = get_mididev(dp, dev)) == NULL)
402 return -ENODEV;
403 if (! mdev->opened || mdev->devinfo != dp) {
404 snd_use_lock_free(&mdev->use_lock);
405 return 0;
406 }
407
408 debug_printk(("closing client %d port %d mode %d\n", mdev->client, mdev->port, mdev->opened));
409 memset(&subs, 0, sizeof(subs));
410 if (mdev->opened & PERM_WRITE) {
411 subs.sender = dp->addr;
412 subs.dest.client = mdev->client;
413 subs.dest.port = mdev->port;
414 snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, &subs);
415 }
416 if (mdev->opened & PERM_READ) {
417 subs.sender.client = mdev->client;
418 subs.sender.port = mdev->port;
419 subs.dest = dp->addr;
420 snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, &subs);
421 }
422
423 mdev->opened = 0;
424 mdev->devinfo = NULL;
425
426 snd_use_lock_free(&mdev->use_lock);
427 return 0;
428}
429
430
431
432
433int
434snd_seq_oss_midi_filemode(struct seq_oss_devinfo *dp, int dev)
435{
436 struct seq_oss_midi *mdev;
437 int mode;
438
439 if ((mdev = get_mididev(dp, dev)) == NULL)
440 return 0;
441
442 mode = 0;
443 if (mdev->opened & PERM_WRITE)
444 mode |= SNDRV_SEQ_OSS_FILE_WRITE;
445 if (mdev->opened & PERM_READ)
446 mode |= SNDRV_SEQ_OSS_FILE_READ;
447
448 snd_use_lock_free(&mdev->use_lock);
449 return mode;
450}
451
452
453
454
455
456void
457snd_seq_oss_midi_reset(struct seq_oss_devinfo *dp, int dev)
458{
459 struct seq_oss_midi *mdev;
460
461 if ((mdev = get_mididev(dp, dev)) == NULL)
462 return;
463 if (! mdev->opened) {
464 snd_use_lock_free(&mdev->use_lock);
465 return;
466 }
467
468 if (mdev->opened & PERM_WRITE) {
469 struct snd_seq_event ev;
470 int c;
471
472 debug_printk(("resetting client %d port %d\n", mdev->client, mdev->port));
473 memset(&ev, 0, sizeof(ev));
474 ev.dest.client = mdev->client;
475 ev.dest.port = mdev->port;
476 ev.queue = dp->queue;
477 ev.source.port = dp->port;
478 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_SYNTH) {
479 ev.type = SNDRV_SEQ_EVENT_SENSING;
480 snd_seq_oss_dispatch(dp, &ev, 0, 0);
481 }
482 for (c = 0; c < 16; c++) {
483 ev.type = SNDRV_SEQ_EVENT_CONTROLLER;
484 ev.data.control.channel = c;
485 ev.data.control.param = MIDI_CTL_ALL_NOTES_OFF;
486 snd_seq_oss_dispatch(dp, &ev, 0, 0);
487 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) {
488 ev.data.control.param =
489 MIDI_CTL_RESET_CONTROLLERS;
490 snd_seq_oss_dispatch(dp, &ev, 0, 0);
491 ev.type = SNDRV_SEQ_EVENT_PITCHBEND;
492 ev.data.control.value = 0;
493 snd_seq_oss_dispatch(dp, &ev, 0, 0);
494 }
495 }
496 }
497
498 snd_use_lock_free(&mdev->use_lock);
499}
500
501
502
503
504
505void
506snd_seq_oss_midi_get_addr(struct seq_oss_devinfo *dp, int dev, struct snd_seq_addr *addr)
507{
508 struct seq_oss_midi *mdev;
509
510 if ((mdev = get_mididev(dp, dev)) == NULL)
511 return;
512 addr->client = mdev->client;
513 addr->port = mdev->port;
514 snd_use_lock_free(&mdev->use_lock);
515}
516
517
518
519
520
521int
522snd_seq_oss_midi_input(struct snd_seq_event *ev, int direct, void *private_data)
523{
524 struct seq_oss_devinfo *dp = (struct seq_oss_devinfo *)private_data;
525 struct seq_oss_midi *mdev;
526 int rc;
527
528 if (dp->readq == NULL)
529 return 0;
530 if ((mdev = find_slot(ev->source.client, ev->source.port)) == NULL)
531 return 0;
532 if (! (mdev->opened & PERM_READ)) {
533 snd_use_lock_free(&mdev->use_lock);
534 return 0;
535 }
536
537 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
538 rc = send_synth_event(dp, ev, mdev->seq_device);
539 else
540 rc = send_midi_event(dp, ev, mdev);
541
542 snd_use_lock_free(&mdev->use_lock);
543 return rc;
544}
545
546
547
548
549static int
550send_synth_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int dev)
551{
552 union evrec ossev;
553
554 memset(&ossev, 0, sizeof(ossev));
555
556 switch (ev->type) {
557 case SNDRV_SEQ_EVENT_NOTEON:
558 ossev.v.cmd = MIDI_NOTEON; break;
559 case SNDRV_SEQ_EVENT_NOTEOFF:
560 ossev.v.cmd = MIDI_NOTEOFF; break;
561 case SNDRV_SEQ_EVENT_KEYPRESS:
562 ossev.v.cmd = MIDI_KEY_PRESSURE; break;
563 case SNDRV_SEQ_EVENT_CONTROLLER:
564 ossev.l.cmd = MIDI_CTL_CHANGE; break;
565 case SNDRV_SEQ_EVENT_PGMCHANGE:
566 ossev.l.cmd = MIDI_PGM_CHANGE; break;
567 case SNDRV_SEQ_EVENT_CHANPRESS:
568 ossev.l.cmd = MIDI_CHN_PRESSURE; break;
569 case SNDRV_SEQ_EVENT_PITCHBEND:
570 ossev.l.cmd = MIDI_PITCH_BEND; break;
571 default:
572 return 0;
573 }
574
575 ossev.v.dev = dev;
576
577 switch (ev->type) {
578 case SNDRV_SEQ_EVENT_NOTEON:
579 case SNDRV_SEQ_EVENT_NOTEOFF:
580 case SNDRV_SEQ_EVENT_KEYPRESS:
581 ossev.v.code = EV_CHN_VOICE;
582 ossev.v.note = ev->data.note.note;
583 ossev.v.parm = ev->data.note.velocity;
584 ossev.v.chn = ev->data.note.channel;
585 break;
586 case SNDRV_SEQ_EVENT_CONTROLLER:
587 case SNDRV_SEQ_EVENT_PGMCHANGE:
588 case SNDRV_SEQ_EVENT_CHANPRESS:
589 ossev.l.code = EV_CHN_COMMON;
590 ossev.l.p1 = ev->data.control.param;
591 ossev.l.val = ev->data.control.value;
592 ossev.l.chn = ev->data.control.channel;
593 break;
594 case SNDRV_SEQ_EVENT_PITCHBEND:
595 ossev.l.code = EV_CHN_COMMON;
596 ossev.l.val = ev->data.control.value + 8192;
597 ossev.l.chn = ev->data.control.channel;
598 break;
599 }
600
601 snd_seq_oss_readq_put_timestamp(dp->readq, ev->time.tick, dp->seq_mode);
602 snd_seq_oss_readq_put_event(dp->readq, &ossev);
603
604 return 0;
605}
606
607
608
609
610static int
611send_midi_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, struct seq_oss_midi *mdev)
612{
613 char msg[32];
614 int len;
615
616 snd_seq_oss_readq_put_timestamp(dp->readq, ev->time.tick, dp->seq_mode);
617 if (!dp->timer->running)
618 len = snd_seq_oss_timer_start(dp->timer);
619 if (ev->type == SNDRV_SEQ_EVENT_SYSEX) {
620 if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) == SNDRV_SEQ_EVENT_LENGTH_VARIABLE)
621 snd_seq_oss_readq_puts(dp->readq, mdev->seq_device,
622 ev->data.ext.ptr, ev->data.ext.len);
623 } else {
624 len = snd_midi_event_decode(mdev->coder, msg, sizeof(msg), ev);
625 if (len > 0)
626 snd_seq_oss_readq_puts(dp->readq, mdev->seq_device, msg, len);
627 }
628
629 return 0;
630}
631
632
633
634
635
636
637
638int
639snd_seq_oss_midi_putc(struct seq_oss_devinfo *dp, int dev, unsigned char c, struct snd_seq_event *ev)
640{
641 struct seq_oss_midi *mdev;
642
643 if ((mdev = get_mididev(dp, dev)) == NULL)
644 return -ENODEV;
645 if (snd_midi_event_encode_byte(mdev->coder, c, ev) > 0) {
646 snd_seq_oss_fill_addr(dp, ev, mdev->client, mdev->port);
647 snd_use_lock_free(&mdev->use_lock);
648 return 0;
649 }
650 snd_use_lock_free(&mdev->use_lock);
651 return -EINVAL;
652}
653
654
655
656
657int
658snd_seq_oss_midi_make_info(struct seq_oss_devinfo *dp, int dev, struct midi_info *inf)
659{
660 struct seq_oss_midi *mdev;
661
662 if ((mdev = get_mididev(dp, dev)) == NULL)
663 return -ENXIO;
664 inf->device = dev;
665 inf->dev_type = 0;
666 inf->capabilities = 0;
667 strlcpy(inf->name, mdev->name, sizeof(inf->name));
668 snd_use_lock_free(&mdev->use_lock);
669 return 0;
670}
671
672
673#ifdef CONFIG_PROC_FS
674
675
676
677static char *
678capmode_str(int val)
679{
680 val &= PERM_READ|PERM_WRITE;
681 if (val == (PERM_READ|PERM_WRITE))
682 return "read/write";
683 else if (val == PERM_READ)
684 return "read";
685 else if (val == PERM_WRITE)
686 return "write";
687 else
688 return "none";
689}
690
691void
692snd_seq_oss_midi_info_read(struct snd_info_buffer *buf)
693{
694 int i;
695 struct seq_oss_midi *mdev;
696
697 snd_iprintf(buf, "\nNumber of MIDI devices: %d\n", max_midi_devs);
698 for (i = 0; i < max_midi_devs; i++) {
699 snd_iprintf(buf, "\nmidi %d: ", i);
700 mdev = get_mdev(i);
701 if (mdev == NULL) {
702 snd_iprintf(buf, "*empty*\n");
703 continue;
704 }
705 snd_iprintf(buf, "[%s] ALSA port %d:%d\n", mdev->name,
706 mdev->client, mdev->port);
707 snd_iprintf(buf, " capability %s / opened %s\n",
708 capmode_str(mdev->flags),
709 capmode_str(mdev->opened));
710 snd_use_lock_free(&mdev->use_lock);
711 }
712}
713#endif
714