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[netbsd-mini2440.git] / sys / dev / sequencer.c
blobb281d96c32e4a84b3c583fc65f9ad80ac709a928
1 /* $NetBSD: sequencer.c,v 1.51 2009/01/11 10:40:27 cegger Exp $ */
2
3 /*
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Lennart Augustsson (augustss@NetBSD.org).
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: sequencer.c,v 1.51 2009/01/11 10:40:27 cegger Exp $");
34
35 #include "sequencer.h"
36
37 #include <sys/param.h>
38 #include <sys/ioctl.h>
39 #include <sys/fcntl.h>
40 #include <sys/vnode.h>
41 #include <sys/select.h>
42 #include <sys/poll.h>
43 #include <sys/malloc.h>
44 #include <sys/proc.h>
45 #include <sys/systm.h>
46 #include <sys/syslog.h>
47 #include <sys/kernel.h>
48 #include <sys/signalvar.h>
49 #include <sys/conf.h>
50 #include <sys/audioio.h>
51 #include <sys/midiio.h>
52 #include <sys/device.h>
53 #include <sys/intr.h>
54
55 #include <dev/midi_if.h>
56 #include <dev/midivar.h>
57 #include <dev/sequencervar.h>
58
59 #define ADDTIMEVAL(a, b) ( \
60 (a)->tv_sec += (b)->tv_sec, \
61 (a)->tv_usec += (b)->tv_usec, \
62 (a)->tv_usec > 1000000 ? ((a)->tv_sec++, (a)->tv_usec -= 1000000) : 0\
63 )
64
65 #define SUBTIMEVAL(a, b) ( \
66 (a)->tv_sec -= (b)->tv_sec, \
67 (a)->tv_usec -= (b)->tv_usec, \
68 (a)->tv_usec < 0 ? ((a)->tv_sec--, (a)->tv_usec += 1000000) : 0\
69 )
70
71 #ifdef AUDIO_DEBUG
72 #define DPRINTF(x) if (sequencerdebug) printf x
73 #define DPRINTFN(n,x) if (sequencerdebug >= (n)) printf x
74 int sequencerdebug = 0;
75 #else
76 #define DPRINTF(x)
77 #define DPRINTFN(n,x)
78 #endif
79
80 #define SEQ_NOTE_MAX 128
81 #define SEQ_NOTE_XXX 255
82
83 #define RECALC_USPERDIV(t) \
84 ((t)->usperdiv = 60*1000000L/((t)->tempo_beatpermin*(t)->timebase_divperbeat))
85
86 struct sequencer_softc seqdevs[NSEQUENCER];
87
88 void sequencerattach(int);
89 static void seq_reset(struct sequencer_softc *);
90 static int seq_do_command(struct sequencer_softc *, seq_event_t *);
91 static int seq_do_chnvoice(struct sequencer_softc *, seq_event_t *);
92 static int seq_do_chncommon(struct sequencer_softc *, seq_event_t *);
93 static void seq_timer_waitabs(struct sequencer_softc *, uint32_t);
94 static int seq_do_timing(struct sequencer_softc *, seq_event_t *);
95 static int seq_do_local(struct sequencer_softc *, seq_event_t *);
96 static int seq_do_sysex(struct sequencer_softc *, seq_event_t *);
97 static int seq_do_fullsize(struct sequencer_softc *, seq_event_t *, struct uio *);
98 static int seq_input_event(struct sequencer_softc *, seq_event_t *);
99 static int seq_drain(struct sequencer_softc *);
100 static void seq_startoutput(struct sequencer_softc *);
101 static void seq_timeout(void *);
102 static int seq_to_new(seq_event_t *, struct uio *);
103 static int seq_sleep_timo(int *, const char *, int);
104 static int seq_sleep(int *, const char *);
105 static void seq_wakeup(int *);
106 static void seq_softintr(void *);
107
108 struct midi_softc;
109 static int midiseq_out(struct midi_dev *, u_char *, u_int, int);
110 static struct midi_dev *midiseq_open(int, int);
111 static void midiseq_close(struct midi_dev *);
112 static void midiseq_reset(struct midi_dev *);
113 static int midiseq_noteon(struct midi_dev *, int, int, seq_event_t *);
114 static int midiseq_noteoff(struct midi_dev *, int, int, seq_event_t *);
115 static int midiseq_keypressure(struct midi_dev *, int, int, seq_event_t *);
116 static int midiseq_pgmchange(struct midi_dev *, int, seq_event_t *);
117 static int midiseq_chnpressure(struct midi_dev *, int, seq_event_t *);
118 static int midiseq_ctlchange(struct midi_dev *, int, seq_event_t *);
119 static int midiseq_pitchbend(struct midi_dev *, int, seq_event_t *);
120 static int midiseq_loadpatch(struct midi_dev *, struct sysex_info *, struct uio *);
121 void midiseq_in(struct midi_dev *, u_char *, int);
122
123 static dev_type_open(sequenceropen);
124 static dev_type_close(sequencerclose);
125 static dev_type_read(sequencerread);
126 static dev_type_write(sequencerwrite);
127 static dev_type_ioctl(sequencerioctl);
128 static dev_type_poll(sequencerpoll);
129 static dev_type_kqfilter(sequencerkqfilter);
130
131 const struct cdevsw sequencer_cdevsw = {
132 sequenceropen, sequencerclose, sequencerread, sequencerwrite,
133 sequencerioctl, nostop, notty, sequencerpoll, nommap,
134 sequencerkqfilter, D_OTHER,
135 };
136
137 void
138 sequencerattach(int n)
139 {
140 struct sequencer_softc *sc;
141
142 for (n = 0; n < NSEQUENCER; n++) {
143 sc = &seqdevs[n];
144 callout_init(&sc->sc_callout, 0);
145 sc->sih = softint_establish(SOFTINT_SERIAL, seq_softintr, sc);
146 }
147 }
148
149 static int
150 sequenceropen(dev_t dev, int flags, int ifmt, struct lwp *l)
151 {
152 int unit = SEQUENCERUNIT(dev);
153 struct sequencer_softc *sc;
154 struct midi_dev *md;
155 int nmidi;
156
157 DPRINTF(("sequenceropen\n"));
158
159 if (unit >= NSEQUENCER)
160 return (ENXIO);
161 sc = &seqdevs[unit];
162 if (sc->isopen)
163 return EBUSY;
164 if (SEQ_IS_OLD(unit))
165 sc->mode = SEQ_OLD;
166 else
167 sc->mode = SEQ_NEW;
168 sc->isopen++;
169 sc->flags = flags & (FREAD|FWRITE);
170 sc->rchan = 0;
171 sc->wchan = 0;
172 sc->pbus = 0;
173 sc->async = 0;
174 sc->input_stamp = ~0;
175
176 sc->nmidi = 0;
177 nmidi = midi_unit_count();
178
179 sc->devs = malloc(nmidi * sizeof(struct midi_dev *),
180 M_DEVBUF, M_WAITOK);
181 for (unit = 0; unit < nmidi; unit++) {
182 md = midiseq_open(unit, flags);
183 if (md) {
184 sc->devs[sc->nmidi++] = md;
185 md->seq = sc;
186 md->doingsysex = 0;
187 }
188 }
189
190 sc->timer.timebase_divperbeat = 100;
191 sc->timer.tempo_beatpermin = 60;
192 RECALC_USPERDIV(&sc->timer);
193 sc->timer.divs_lastevent = sc->timer.divs_lastchange = 0;
194 microtime(&sc->timer.reftime);
195
196 SEQ_QINIT(&sc->inq);
197 SEQ_QINIT(&sc->outq);
198 sc->lowat = SEQ_MAXQ / 2;
199
200 seq_reset(sc);
201
202 DPRINTF(("sequenceropen: mode=%d, nmidi=%d\n", sc->mode, sc->nmidi));
203 return 0;
204 }
205
206 static int
207 seq_sleep_timo(int *chan, const char *label, int timo)
208 {
209 int st;
210
211 if (!label)
212 label = "seq";
213
214 DPRINTFN(5, ("seq_sleep_timo: %p %s %d\n", chan, label, timo));
215 *chan = 1;
216 st = tsleep(chan, PWAIT | PCATCH, label, timo);
217 *chan = 0;
218 #ifdef MIDI_DEBUG
219 if (st != 0)
220 printf("seq_sleep: %d\n", st);
221 #endif
222 return st;
223 }
224
225 static int
226 seq_sleep(int *chan, const char *label)
227 {
228 return seq_sleep_timo(chan, label, 0);
229 }
230
231 static void
232 seq_wakeup(int *chan)
233 {
234 if (*chan) {
235 DPRINTFN(5, ("seq_wakeup: %p\n", chan));
236 wakeup(chan);
237 *chan = 0;
238 }
239 }
240
241 static int
242 seq_drain(struct sequencer_softc *sc)
243 {
244 int error;
245
246 DPRINTFN(3, ("seq_drain: %p, len=%d\n", sc, SEQ_QLEN(&sc->outq)));
247 seq_startoutput(sc);
248 error = 0;
249 while(!SEQ_QEMPTY(&sc->outq) && !error)
250 error = seq_sleep_timo(&sc->wchan, "seq_dr", 60*hz);
251 return (error);
252 }
253
254 static void
255 seq_timeout(void *addr)
256 {
257 struct sequencer_softc *sc = addr;
258 struct proc *p;
259
260 DPRINTFN(4, ("seq_timeout: %p\n", sc));
261 sc->timeout = 0;
262 seq_startoutput(sc);
263 if (SEQ_QLEN(&sc->outq) < sc->lowat) {
264 seq_wakeup(&sc->wchan);
265 selnotify(&sc->wsel, 0, 0);
266 if (sc->async != NULL) {
267 mutex_enter(proc_lock);
268 if ((p = sc->async) != NULL)
269 psignal(p, SIGIO);
270 mutex_exit(proc_lock);
271 }
272 }
273
274 }
275
276 static void
277 seq_startoutput(struct sequencer_softc *sc)
278 {
279 struct sequencer_queue *q = &sc->outq;
280 seq_event_t cmd;
281
282 if (sc->timeout)
283 return;
284 DPRINTFN(4, ("seq_startoutput: %p, len=%d\n", sc, SEQ_QLEN(q)));
285 while(!SEQ_QEMPTY(q) && !sc->timeout) {
286 SEQ_QGET(q, cmd);
287 seq_do_command(sc, &cmd);
288 }
289 }
290
291 static int
292 sequencerclose(dev_t dev, int flags, int ifmt,
293 struct lwp *l)
294 {
295 struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)];
296 int n, s;
297
298 DPRINTF(("sequencerclose: %p\n", sc));
299
300 seq_drain(sc);
301 s = splaudio();
302 if (sc->timeout) {
303 callout_stop(&sc->sc_callout);
304 sc->timeout = 0;
305 }
306 splx(s);
307
308 for (n = 0; n < sc->nmidi; n++)
309 midiseq_close(sc->devs[n]);
310 free(sc->devs, M_DEVBUF);
311 sc->isopen = 0;
312 return (0);
313 }
314
315 static void
316 seq_softintr(void *cookie)
317 {
318 struct sequencer_softc *sc = cookie;
319 struct proc *p;
320
321 seq_wakeup(&sc->rchan);
322 selnotify(&sc->rsel, 0, 0);
323 if (sc->async != NULL) {
324 mutex_enter(proc_lock);
325 if ((p = sc->async) != NULL)
326 psignal(p, SIGIO);
327 mutex_exit(proc_lock);
328 }
329 }
330
331 static int
332 seq_input_event(struct sequencer_softc *sc, seq_event_t *cmd)
333 {
334 struct sequencer_queue *q = &sc->inq;
335
336 DPRINTFN(2, ("seq_input_event: %02x %02x %02x %02x %02x %02x %02x %02x\n",
337 cmd->tag,
338 cmd->unknown.byte[0], cmd->unknown.byte[1],
339 cmd->unknown.byte[2], cmd->unknown.byte[3],
340 cmd->unknown.byte[4], cmd->unknown.byte[5],
341 cmd->unknown.byte[6]));
342 if (SEQ_QFULL(q))
343 return (ENOMEM);
344 SEQ_QPUT(q, *cmd);
345 softint_schedule(sc->sih);
346 return 0;
347 }
348
349 void
350 seq_event_intr(void *addr, seq_event_t *iev)
351 {
352 struct sequencer_softc *sc = addr;
353 u_long t;
354 struct timeval now;
355 int s;
356
357 microtime(&now);
358 s = splsoftclock();
359 if (!sc->timer.running)
360 now = sc->timer.stoptime;
361 SUBTIMEVAL(&now, &sc->timer.reftime);
362 t = now.tv_sec * 1000000 + now.tv_usec;
363 t /= sc->timer.usperdiv;
364 t += sc->timer.divs_lastchange;
365 splx(s);
366 if (t != sc->input_stamp) {
367 seq_input_event(sc, &SEQ_MK_TIMING(WAIT_ABS, .divisions=t));
368 sc->input_stamp = t; /* XXX wha hoppen if timer is reset? */
369 }
370 seq_input_event(sc, iev);
371 }
372
373 static int
374 sequencerread(dev_t dev, struct uio *uio, int ioflag)
375 {
376 struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)];
377 struct sequencer_queue *q = &sc->inq;
378 seq_event_t ev;
379 int error, s;
380
381 DPRINTFN(20, ("sequencerread: %p, count=%d, ioflag=%x\n",
382 sc, (int) uio->uio_resid, ioflag));
383
384 if (sc->mode == SEQ_OLD) {
385 DPRINTFN(-1,("sequencerread: old read\n"));
386 return (EINVAL); /* XXX unimplemented */
387 }
388
389 error = 0;
390 while (SEQ_QEMPTY(q)) {
391 if (ioflag & IO_NDELAY)
392 return EWOULDBLOCK;
393 else {
394 error = seq_sleep(&sc->rchan, "seq rd");
395 if (error)
396 return error;
397 }
398 }
399 s = splaudio();
400 while (uio->uio_resid >= sizeof ev && !error && !SEQ_QEMPTY(q)) {
401 SEQ_QGET(q, ev);
402 error = uiomove(&ev, sizeof ev, uio);
403 }
404 splx(s);
405 return error;
406 }
407
408 static int
409 sequencerwrite(dev_t dev, struct uio *uio, int ioflag)
410 {
411 struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)];
412 struct sequencer_queue *q = &sc->outq;
413 int error;
414 seq_event_t cmdbuf;
415 int size;
416
417 DPRINTFN(2, ("sequencerwrite: %p, count=%d\n", sc, (int) uio->uio_resid));
418
419 error = 0;
420 size = sc->mode == SEQ_NEW ? sizeof cmdbuf : SEQOLD_CMDSIZE;
421 while (uio->uio_resid >= size) {
422 error = uiomove(&cmdbuf, size, uio);
423 if (error)
424 break;
425 if (sc->mode == SEQ_OLD)
426 if (seq_to_new(&cmdbuf, uio))
427 continue;
428 if (cmdbuf.tag == SEQ_FULLSIZE) {
429 /* We do it like OSS does, asynchronously */
430 error = seq_do_fullsize(sc, &cmdbuf, uio);
431 if (error)
432 break;
433 continue;
434 }
435 while (SEQ_QFULL(q)) {
436 seq_startoutput(sc);
437 if (SEQ_QFULL(q)) {
438 if (ioflag & IO_NDELAY)
439 return EWOULDBLOCK;
440 error = seq_sleep(&sc->wchan, "seq_wr");
441 if (error)
442 return error;
443 }
444 }
445 SEQ_QPUT(q, cmdbuf);
446 }
447 seq_startoutput(sc);
448
449 #ifdef SEQUENCER_DEBUG
450 if (error)
451 DPRINTFN(2, ("sequencerwrite: error=%d\n", error));
452 #endif
453 return error;
454 }
455
456 static int
457 sequencerioctl(dev_t dev, u_long cmd, void *addr, int flag,
458 struct lwp *l)
459 {
460 struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)];
461 struct synth_info *si;
462 struct midi_dev *md;
463 int devno;
464 int error;
465 int s;
466 int t;
467
468 DPRINTFN(2, ("sequencerioctl: %p cmd=0x%08lx\n", sc, cmd));
469
470 error = 0;
471 switch (cmd) {
472 case FIONBIO:
473 /* All handled in the upper FS layer. */
474 break;
475
476 case FIOASYNC:
477 if (*(int *)addr) {
478 if (sc->async)
479 return EBUSY;
480 sc->async = l->l_proc;
481 DPRINTF(("sequencer_ioctl: FIOASYNC %p\n", l));
482 } else
483 sc->async = 0;
484 break;
485
486 case SEQUENCER_RESET:
487 seq_reset(sc);
488 break;
489
490 case SEQUENCER_PANIC:
491 seq_reset(sc);
492 /* Do more? OSS doesn't */
493 break;
494
495 case SEQUENCER_SYNC:
496 if (sc->flags == FREAD)
497 return 0;
498 seq_drain(sc);
499 error = 0;
500 break;
501
502 case SEQUENCER_INFO:
503 si = (struct synth_info*)addr;
504 devno = si->device;
505 if (devno < 0 || devno >= sc->nmidi)
506 return EINVAL;
507 md = sc->devs[devno];
508 strncpy(si->name, md->name, sizeof si->name);
509 si->synth_type = SYNTH_TYPE_MIDI;
510 si->synth_subtype = md->subtype;
511 si->nr_voices = md->nr_voices;
512 si->instr_bank_size = md->instr_bank_size;
513 si->capabilities = md->capabilities;
514 break;
515
516 case SEQUENCER_NRSYNTHS:
517 *(int *)addr = sc->nmidi;
518 break;
519
520 case SEQUENCER_NRMIDIS:
521 *(int *)addr = sc->nmidi;
522 break;
523
524 case SEQUENCER_OUTOFBAND:
525 DPRINTFN(3, ("sequencer_ioctl: OOB=%02x %02x %02x %02x %02x %02x %02x %02x\n",
526 *(u_char *)addr, *((u_char *)addr+1),
527 *((u_char *)addr+2), *((u_char *)addr+3),
528 *((u_char *)addr+4), *((u_char *)addr+5),
529 *((u_char *)addr+6), *((u_char *)addr+7)));
530 if ( !(sc->flags & FWRITE ) )
531 return EBADF;
532 error = seq_do_command(sc, (seq_event_t *)addr);
533 break;
534
535 case SEQUENCER_TMR_TIMEBASE:
536 t = *(int *)addr;
537 if (t < 1)
538 t = 1;
539 if (t > 10000)
540 t = 10000;
541 *(int *)addr = t;
542 s = splsoftclock();
543 sc->timer.timebase_divperbeat = t;
544 sc->timer.divs_lastchange = sc->timer.divs_lastevent;
545 microtime(&sc->timer.reftime);
546 RECALC_USPERDIV(&sc->timer);
547 splx(s);
548 break;
549
550 case SEQUENCER_TMR_START:
551 s = splsoftclock();
552 error = seq_do_timing(sc, &SEQ_MK_TIMING(START));
553 splx(s);
554 break;
555
556 case SEQUENCER_TMR_STOP:
557 s = splsoftclock();
558 error = seq_do_timing(sc, &SEQ_MK_TIMING(STOP));
559 splx(s);
560 break;
561
562 case SEQUENCER_TMR_CONTINUE:
563 s = splsoftclock();
564 error = seq_do_timing(sc, &SEQ_MK_TIMING(CONTINUE));
565 splx(s);
566 break;
567
568 case SEQUENCER_TMR_TEMPO:
569 s = splsoftclock();
570 error = seq_do_timing(sc,
571 &SEQ_MK_TIMING(TEMPO, .bpm=*(int *)addr));
572 splx(s);
573 if (!error)
574 *(int *)addr = sc->timer.tempo_beatpermin;
575 break;
576
577 case SEQUENCER_TMR_SOURCE:
578 *(int *)addr = SEQUENCER_TMR_INTERNAL;
579 break;
580
581 case SEQUENCER_TMR_METRONOME:
582 /* noop */
583 break;
584
585 case SEQUENCER_THRESHOLD:
586 t = SEQ_MAXQ - *(int *)addr / sizeof (seq_event_rec);
587 if (t < 1)
588 t = 1;
589 if (t > SEQ_MAXQ)
590 t = SEQ_MAXQ;
591 sc->lowat = t;
592 break;
593
594 case SEQUENCER_CTRLRATE:
595 s = splsoftclock();
596 *(int *)addr = (sc->timer.tempo_beatpermin
597 *sc->timer.timebase_divperbeat + 30) / 60;
598 splx(s);
599 break;
600
601 case SEQUENCER_GETTIME:
602 {
603 struct timeval now;
604 u_long tx;
605 microtime(&now);
606 s = splsoftclock();
607 SUBTIMEVAL(&now, &sc->timer.reftime);
608 tx = now.tv_sec * 1000000 + now.tv_usec;
609 tx /= sc->timer.usperdiv;
610 tx += sc->timer.divs_lastchange;
611 splx(s);
612 *(int *)addr = tx;
613 break;
614 }
615
616 default:
617 DPRINTFN(-1,("sequencer_ioctl: unimpl %08lx\n", cmd));
618 error = EINVAL;
619 break;
620 }
621 return error;
622 }
623
624 static int
625 sequencerpoll(dev_t dev, int events, struct lwp *l)
626 {
627 struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)];
628 int revents = 0;
629
630 DPRINTF(("sequencerpoll: %p events=0x%x\n", sc, events));
631
632 if (events & (POLLIN | POLLRDNORM))
633 if ((sc->flags&FREAD) && !SEQ_QEMPTY(&sc->inq))
634 revents |= events & (POLLIN | POLLRDNORM);
635
636 if (events & (POLLOUT | POLLWRNORM))
637 if ((sc->flags&FWRITE) && SEQ_QLEN(&sc->outq) < sc->lowat)
638 revents |= events & (POLLOUT | POLLWRNORM);
639
640 if (revents == 0) {
641 if ((sc->flags&FREAD) && (events & (POLLIN | POLLRDNORM)))
642 selrecord(l, &sc->rsel);
643
644 if ((sc->flags&FWRITE) && (events & (POLLOUT | POLLWRNORM)))
645 selrecord(l, &sc->wsel);
646 }
647
648 return revents;
649 }
650
651 static void
652 filt_sequencerrdetach(struct knote *kn)
653 {
654 struct sequencer_softc *sc = kn->kn_hook;
655 int s;
656
657 s = splaudio();
658 SLIST_REMOVE(&sc->rsel.sel_klist, kn, knote, kn_selnext);
659 splx(s);
660 }
661
662 static int
663 filt_sequencerread(struct knote *kn, long hint)
664 {
665 struct sequencer_softc *sc = kn->kn_hook;
666
667 /* XXXLUKEM (thorpej): make sure this is correct */
668
669 if (SEQ_QEMPTY(&sc->inq))
670 return (0);
671 kn->kn_data = sizeof(seq_event_rec);
672 return (1);
673 }
674
675 static const struct filterops sequencerread_filtops =
676 { 1, NULL, filt_sequencerrdetach, filt_sequencerread };
677
678 static void
679 filt_sequencerwdetach(struct knote *kn)
680 {
681 struct sequencer_softc *sc = kn->kn_hook;
682 int s;
683
684 s = splaudio();
685 SLIST_REMOVE(&sc->wsel.sel_klist, kn, knote, kn_selnext);
686 splx(s);
687 }
688
689 static int
690 filt_sequencerwrite(struct knote *kn, long hint)
691 {
692 struct sequencer_softc *sc = kn->kn_hook;
693
694 /* XXXLUKEM (thorpej): make sure this is correct */
695
696 if (SEQ_QLEN(&sc->outq) >= sc->lowat)
697 return (0);
698 kn->kn_data = sizeof(seq_event_rec);
699 return (1);
700 }
701
702 static const struct filterops sequencerwrite_filtops =
703 { 1, NULL, filt_sequencerwdetach, filt_sequencerwrite };
704
705 static int
706 sequencerkqfilter(dev_t dev, struct knote *kn)
707 {
708 struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)];
709 struct klist *klist;
710 int s;
711
712 switch (kn->kn_filter) {
713 case EVFILT_READ:
714 klist = &sc->rsel.sel_klist;
715 kn->kn_fop = &sequencerread_filtops;
716 break;
717
718 case EVFILT_WRITE:
719 klist = &sc->wsel.sel_klist;
720 kn->kn_fop = &sequencerwrite_filtops;
721 break;
722
723 default:
724 return (EINVAL);
725 }
726
727 kn->kn_hook = sc;
728
729 s = splaudio();
730 SLIST_INSERT_HEAD(klist, kn, kn_selnext);
731 splx(s);
732
733 return (0);
734 }
735
736 static void
737 seq_reset(struct sequencer_softc *sc)
738 {
739 int i, chn;
740 struct midi_dev *md;
741
742 if ( !(sc->flags & FWRITE) )
743 return;
744 for (i = 0; i < sc->nmidi; i++) {
745 md = sc->devs[i];
746 midiseq_reset(md);
747 for (chn = 0; chn < MAXCHAN; chn++) {
748 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE,
749 .controller=MIDI_CTRL_NOTES_OFF));
750 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE,
751 .controller=MIDI_CTRL_RESET));
752 midiseq_pitchbend(md, chn, &SEQ_MK_CHN(PITCH_BEND,
753 .value=MIDI_BEND_NEUTRAL));
754 }
755 }
756 }
757
758 static int
759 seq_do_command(struct sequencer_softc *sc, seq_event_t *b)
760 {
761 int dev;
762
763 DPRINTFN(4, ("seq_do_command: %p cmd=0x%02x\n", sc, b->timing.op));
764
765 switch(b->tag) {
766 case SEQ_LOCAL:
767 return seq_do_local(sc, b);
768 case SEQ_TIMING:
769 return seq_do_timing(sc, b);
770 case SEQ_CHN_VOICE:
771 return seq_do_chnvoice(sc, b);
772 case SEQ_CHN_COMMON:
773 return seq_do_chncommon(sc, b);
774 case SEQ_SYSEX:
775 return seq_do_sysex(sc, b);
776 /* COMPAT */
777 case SEQOLD_MIDIPUTC:
778 dev = b->putc.device;
779 if (dev < 0 || dev >= sc->nmidi)
780 return (ENXIO);
781 return midiseq_out(sc->devs[dev], &b->putc.byte, 1, 0);
782 default:
783 DPRINTFN(-1,("seq_do_command: unimpl command %02x\n", b->tag));
784 return (EINVAL);
785 }
786 }
787
788 static int
789 seq_do_chnvoice(struct sequencer_softc *sc, seq_event_t *b)
790 {
791 int dev;
792 int error;
793 struct midi_dev *md;
794
795 dev = b->voice.device;
796 if (dev < 0 || dev >= sc->nmidi ||
797 b->voice.channel > 15 ||
798 b->voice.key >= SEQ_NOTE_MAX)
799 return ENXIO;
800 md = sc->devs[dev];
801 switch(b->voice.op) {
802 case MIDI_NOTEON: /* no need to special-case hidden noteoff here */
803 error = midiseq_noteon(md, b->voice.channel, b->voice.key, b);
804 break;
805 case MIDI_NOTEOFF:
806 error = midiseq_noteoff(md, b->voice.channel, b->voice.key, b);
807 break;
808 case MIDI_KEY_PRESSURE:
809 error = midiseq_keypressure(md,
810 b->voice.channel, b->voice.key, b);
811 break;
812 default:
813 DPRINTFN(-1,("seq_do_chnvoice: unimpl command %02x\n",
814 b->voice.op));
815 error = EINVAL;
816 break;
817 }
818 return error;
819 }
820
821 static int
822 seq_do_chncommon(struct sequencer_softc *sc, seq_event_t *b)
823 {
824 int dev;
825 int error;
826 struct midi_dev *md;
827
828 dev = b->common.device;
829 if (dev < 0 || dev >= sc->nmidi ||
830 b->common.channel > 15)
831 return ENXIO;
832 md = sc->devs[dev];
833 DPRINTFN(2,("seq_do_chncommon: %02x\n", b->common.op));
834
835 error = 0;
836 switch(b->common.op) {
837 case MIDI_PGM_CHANGE:
838 error = midiseq_pgmchange(md, b->common.channel, b);
839 break;
840 case MIDI_CTL_CHANGE:
841 error = midiseq_ctlchange(md, b->common.channel, b);
842 break;
843 case MIDI_PITCH_BEND:
844 error = midiseq_pitchbend(md, b->common.channel, b);
845 break;
846 case MIDI_CHN_PRESSURE:
847 error = midiseq_chnpressure(md, b->common.channel, b);
848 break;
849 default:
850 DPRINTFN(-1,("seq_do_chncommon: unimpl command %02x\n",
851 b->common.op));
852 error = EINVAL;
853 break;
854 }
855 return error;
856 }
857
858 static int
859 seq_do_local(struct sequencer_softc *sc, seq_event_t *b)
860 {
861 return (EINVAL);
862 }
863
864 static int
865 seq_do_sysex(struct sequencer_softc *sc, seq_event_t *b)
866 {
867 int dev, i;
868 struct midi_dev *md;
869 uint8_t *bf = b->sysex.buffer;
870
871 dev = b->sysex.device;
872 if (dev < 0 || dev >= sc->nmidi)
873 return (ENXIO);
874 DPRINTF(("seq_do_sysex: dev=%d\n", dev));
875 md = sc->devs[dev];
876
877 if (!md->doingsysex) {
878 midiseq_out(md, (uint8_t[]){MIDI_SYSEX_START}, 1, 0);
879 md->doingsysex = 1;
880 }
881
882 for (i = 0; i < 6 && bf[i] != 0xff; i++)
883 ;
884 midiseq_out(md, bf, i, 0);
885 if (i < 6 || (i > 0 && bf[i-1] == MIDI_SYSEX_END))
886 md->doingsysex = 0;
887 return 0;
888 }
889
890 static void
891 seq_timer_waitabs(struct sequencer_softc *sc, uint32_t divs)
892 {
893 struct timeval when;
894 long long usec;
895 struct syn_timer *t;
896 int ticks;
897
898 t = &sc->timer;
899 t->divs_lastevent = divs;
900 divs -= t->divs_lastchange;
901 usec = (long long)divs * (long long)t->usperdiv; /* convert to usec */
902 when.tv_sec = usec / 1000000;
903 when.tv_usec = usec % 1000000;
904 DPRINTFN(4, ("seq_timer_waitabs: adjdivs=%d, sleep when=%"PRId64".%06"PRId64,
905 divs, when.tv_sec, (uint64_t)when.tv_usec));
906 ADDTIMEVAL(&when, &t->reftime); /* abstime for end */
907 ticks = tvhzto(&when);
908 DPRINTFN(4, (" when+start=%"PRId64".%06"PRId64", tick=%d\n",
909 when.tv_sec, (uint64_t)when.tv_usec, ticks));
910 if (ticks > 0) {
911 #ifdef DIAGNOSTIC
912 if (ticks > 20 * hz) {
913 /* Waiting more than 20s */
914 printf("seq_timer_waitabs: funny ticks=%d, "
915 "usec=%lld\n", ticks, usec);
916 }
917 #endif
918 sc->timeout = 1;
919 callout_reset(&sc->sc_callout, ticks,
920 seq_timeout, sc);
921 }
922 #ifdef SEQUENCER_DEBUG
923 else if (tick < 0)
924 DPRINTF(("seq_timer_waitabs: ticks = %d\n", ticks));
925 #endif
926 }
927
928 static int
929 seq_do_timing(struct sequencer_softc *sc, seq_event_t *b)
930 {
931 struct syn_timer *t = &sc->timer;
932 struct timeval when;
933 int error;
934
935 error = 0;
936 switch(b->timing.op) {
937 case TMR_WAIT_REL:
938 seq_timer_waitabs(sc,
939 b->t_WAIT_REL.divisions + t->divs_lastevent);
940 break;
941 case TMR_WAIT_ABS:
942 seq_timer_waitabs(sc, b->t_WAIT_ABS.divisions);
943 break;
944 case TMR_START:
945 microtime(&t->reftime);
946 t->divs_lastevent = t->divs_lastchange = 0;
947 t->running = 1;
948 break;
949 case TMR_STOP:
950 microtime(&t->stoptime);
951 t->running = 0;
952 break;
953 case TMR_CONTINUE:
954 if (t->running)
955 break;
956 microtime(&when);
957 SUBTIMEVAL(&when, &t->stoptime);
958 ADDTIMEVAL(&t->reftime, &when);
959 t->running = 1;
960 break;
961 case TMR_TEMPO:
962 /* bpm is unambiguously MIDI clocks per minute / 24 */
963 /* (24 MIDI clocks are usually but not always a quarter note) */
964 if (b->t_TEMPO.bpm < 8) /* where are these limits specified? */
965 t->tempo_beatpermin = 8;
966 else if (b->t_TEMPO.bpm > 360) /* ? */
967 t->tempo_beatpermin = 360;
968 else
969 t->tempo_beatpermin = b->t_TEMPO.bpm;
970 t->divs_lastchange = t->divs_lastevent;
971 microtime(&t->reftime);
972 RECALC_USPERDIV(t);
973 break;
974 case TMR_ECHO:
975 error = seq_input_event(sc, b);
976 break;
977 case TMR_RESET:
978 t->divs_lastevent = t->divs_lastchange = 0;
979 microtime(&t->reftime);
980 break;
981 case TMR_SPP:
982 case TMR_TIMESIG:
983 DPRINTF(("seq_do_timing: unimplemented %02x\n", b->timing.op));
984 error = EINVAL; /* not quite accurate... */
985 break;
986 default:
987 DPRINTF(("seq_timer: unknown %02x\n", b->timing.op));
988 error = EINVAL;
989 break;
990 }
991 return (error);
992 }
993
994 static int
995 seq_do_fullsize(struct sequencer_softc *sc, seq_event_t *b, struct uio *uio)
996 {
997 struct sysex_info sysex;
998 u_int dev;
999
1000 #ifdef DIAGNOSTIC
1001 if (sizeof(seq_event_rec) != SEQ_SYSEX_HDRSIZE) {
1002 printf("seq_do_fullsize: sysex size ??\n");
1003 return EINVAL;
1004 }
1005 #endif
1006 memcpy(&sysex, b, sizeof sysex);
1007 dev = sysex.device_no;
1008 if (/* dev < 0 || */ dev >= sc->nmidi)
1009 return (ENXIO);
1010 DPRINTFN(2, ("seq_do_fullsize: fmt=%04x, dev=%d, len=%d\n",
1011 sysex.key, dev, sysex.len));
1012 return (midiseq_loadpatch(sc->devs[dev], &sysex, uio));
1013 }
1014
1015 /*
1016 * Convert an old sequencer event to a new one.
1017 * NOTE: on entry, *ev may contain valid data only in the first 4 bytes.
1018 * That may be true even on exit (!) in the case of SEQOLD_MIDIPUTC; the
1019 * caller will only look at the first bytes in that case anyway. Ugly? Sure.
1020 */
1021 static int
1022 seq_to_new(seq_event_t *ev, struct uio *uio)
1023 {
1024 int cmd, chan, note, parm;
1025 uint32_t tmp_delay;
1026 int error;
1027 uint8_t *bfp;
1028
1029 cmd = ev->tag;
1030 bfp = ev->unknown.byte;
1031 chan = *bfp++;
1032 note = *bfp++;
1033 parm = *bfp++;
1034 DPRINTFN(3, ("seq_to_new: 0x%02x %d %d %d\n", cmd, chan, note, parm));
1035
1036 if (cmd >= 0x80) {
1037 /* Fill the event record */
1038 if (uio->uio_resid >= sizeof *ev - SEQOLD_CMDSIZE) {
1039 error = uiomove(bfp, sizeof *ev - SEQOLD_CMDSIZE, uio);
1040 if (error)
1041 return error;
1042 } else
1043 return EINVAL;
1044 }
1045
1046 switch(cmd) {
1047 case SEQOLD_NOTEOFF:
1048 /*
1049 * What's with the SEQ_NOTE_XXX? In OSS this seems to have
1050 * been undocumented magic for messing with the overall volume
1051 * of a 'voice', equated precariously with 'channel' and
1052 * pretty much unimplementable except by directly frobbing a
1053 * synth chip. For us, who treat everything as interfaced over
1054 * MIDI, this will just be unceremoniously discarded as
1055 * invalid in midiseq_noteoff, making the whole event an
1056 * elaborate no-op, and that doesn't seem to be any different
1057 * from what happens on linux with a MIDI-interfaced device,
1058 * by the way. The moral is ... use the new /dev/music API, ok?
1059 */
1060 *ev = SEQ_MK_CHN(NOTEOFF, .device=0, .channel=chan,
1061 .key=SEQ_NOTE_XXX, .velocity=parm);
1062 break;
1063 case SEQOLD_NOTEON:
1064 *ev = SEQ_MK_CHN(NOTEON,
1065 .device=0, .channel=chan, .key=note, .velocity=parm);
1066 break;
1067 case SEQOLD_WAIT:
1068 /*
1069 * This event cannot even /exist/ on non-littleendian machines,
1070 * and so help me, that's exactly the way OSS defined it.
1071 * Also, the OSS programmer's guide states (p. 74, v1.11)
1072 * that seqold time units are system clock ticks, unlike
1073 * the new 'divisions' which are determined by timebase. In
1074 * that case we would need to do scaling here - but no such
1075 * behavior is visible in linux either--which also treats this
1076 * value, surprisingly, as an absolute, not relative, time.
1077 * My guess is that this event has gone unused so long that
1078 * nobody could agree we got it wrong no matter what we do.
1079 */
1080 tmp_delay = *(uint32_t *)ev >> 8;
1081 *ev = SEQ_MK_TIMING(WAIT_ABS, .divisions=tmp_delay);
1082 break;
1083 case SEQOLD_SYNCTIMER:
1084 /*
1085 * The TMR_RESET event is not defined in any OSS materials
1086 * I can find; it may have been invented here just to provide
1087 * an accurate _to_new translation of this event.
1088 */
1089 *ev = SEQ_MK_TIMING(RESET);
1090 break;
1091 case SEQOLD_PGMCHANGE:
1092 *ev = SEQ_MK_CHN(PGM_CHANGE,
1093 .device=0, .channel=chan, .program=note);
1094 break;
1095 case SEQOLD_MIDIPUTC:
1096 break; /* interpret in normal mode */
1097 case SEQOLD_ECHO:
1098 case SEQOLD_PRIVATE:
1099 case SEQOLD_EXTENDED:
1100 default:
1101 DPRINTF(("seq_to_new: not impl 0x%02x\n", cmd));
1102 return EINVAL;
1103 /* In case new-style events show up */
1104 case SEQ_TIMING:
1105 case SEQ_CHN_VOICE:
1106 case SEQ_CHN_COMMON:
1107 case SEQ_FULLSIZE:
1108 break;
1109 }
1110 return 0;
1111 }
1112
1113 /**********************************************/
1114
1115 void
1116 midiseq_in(struct midi_dev *md, u_char *msg, int len)
1117 {
1118 int unit = md->unit;
1119 seq_event_t ev;
1120 int status, chan;
1121
1122 DPRINTFN(2, ("midiseq_in: %p %02x %02x %02x\n",
1123 md, msg[0], msg[1], msg[2]));
1124
1125 status = MIDI_GET_STATUS(msg[0]);
1126 chan = MIDI_GET_CHAN(msg[0]);
1127 switch (status) {
1128 case MIDI_NOTEON: /* midi(4) always canonicalizes hidden note-off */
1129 ev = SEQ_MK_CHN(NOTEON, .device=unit, .channel=chan,
1130 .key=msg[1], .velocity=msg[2]);
1131 break;
1132 case MIDI_NOTEOFF:
1133 ev = SEQ_MK_CHN(NOTEOFF, .device=unit, .channel=chan,
1134 .key=msg[1], .velocity=msg[2]);
1135 break;
1136 case MIDI_KEY_PRESSURE:
1137 ev = SEQ_MK_CHN(KEY_PRESSURE, .device=unit, .channel=chan,
1138 .key=msg[1], .pressure=msg[2]);
1139 break;
1140 case MIDI_CTL_CHANGE: /* XXX not correct for MSB */
1141 ev = SEQ_MK_CHN(CTL_CHANGE, .device=unit, .channel=chan,
1142 .controller=msg[1], .value=msg[2]);
1143 break;
1144 case MIDI_PGM_CHANGE:
1145 ev = SEQ_MK_CHN(PGM_CHANGE, .device=unit, .channel=chan,
1146 .program=msg[1]);
1147 break;
1148 case MIDI_CHN_PRESSURE:
1149 ev = SEQ_MK_CHN(CHN_PRESSURE, .device=unit, .channel=chan,
1150 .pressure=msg[1]);
1151 break;
1152 case MIDI_PITCH_BEND:
1153 ev = SEQ_MK_CHN(PITCH_BEND, .device=unit, .channel=chan,
1154 .value=(msg[1] & 0x7f) | ((msg[2] & 0x7f) << 7));
1155 break;
1156 default: /* this is now the point where MIDI_ACKs disappear */
1157 return;
1158 }
1159 seq_event_intr(md->seq, &ev);
1160 }
1161
1162 static struct midi_dev *
1163 midiseq_open(int unit, int flags)
1164 {
1165 extern struct cfdriver midi_cd;
1166 int error;
1167 struct midi_dev *md;
1168 struct midi_softc *sc;
1169 struct midi_info mi;
1170 int major;
1171 dev_t dev;
1172
1173 major = devsw_name2chr("midi", NULL, 0);
1174 dev = makedev(major, unit);
1175
1176 midi_getinfo(dev, &mi);
1177 if ( !(mi.props & MIDI_PROP_CAN_INPUT) )
1178 flags &= ~FREAD;
1179 if ( 0 == ( flags & ( FREAD | FWRITE ) ) )
1180 return 0;
1181 DPRINTFN(2, ("midiseq_open: %d %d\n", unit, flags));
1182 error = cdev_open(dev, flags, 0, 0);
1183 if (error)
1184 return (0);
1185 sc = device_lookup_private(&midi_cd, unit);
1186 sc->seqopen = 1;
1187 md = malloc(sizeof *md, M_DEVBUF, M_WAITOK|M_ZERO);
1188 sc->seq_md = md;
1189 md->msc = sc;
1190 md->unit = unit;
1191 md->name = mi.name;
1192 md->subtype = 0;
1193 md->nr_voices = 128; /* XXX */
1194 md->instr_bank_size = 128; /* XXX */
1195 if (mi.props & MIDI_PROP_CAN_INPUT)
1196 md->capabilities |= SYNTH_CAP_INPUT;
1197 return (md);
1198 }
1199
1200 static void
1201 midiseq_close(struct midi_dev *md)
1202 {
1203 int major;
1204 dev_t dev;
1205
1206 major = devsw_name2chr("midi", NULL, 0);
1207 dev = makedev(major, md->unit);
1208
1209 DPRINTFN(2, ("midiseq_close: %d\n", md->unit));
1210 cdev_close(dev, 0, 0, 0);
1211 free(md, M_DEVBUF);
1212 }
1213
1214 static void
1215 midiseq_reset(struct midi_dev *md)
1216 {
1217 /* XXX send GM reset? */
1218 DPRINTFN(3, ("midiseq_reset: %d\n", md->unit));
1219 }
1220
1221 static int
1222 midiseq_out(struct midi_dev *md, u_char *bf, u_int cc, int chk)
1223 {
1224 DPRINTFN(5, ("midiseq_out: m=%p, unit=%d, bf[0]=0x%02x, cc=%d\n",
1225 md->msc, md->unit, bf[0], cc));
1226
1227 /* midi(4) does running status compression where appropriate. */
1228 return midi_writebytes(md->unit, bf, cc);
1229 }
1230
1231 /*
1232 * If the writing process hands us a hidden note-off in a note-on event,
1233 * we will simply write it that way; no need to special case it here,
1234 * as midi(4) will always canonicalize or compress as appropriate anyway.
1235 */
1236 static int
1237 midiseq_noteon(struct midi_dev *md, int chan, int key, seq_event_t *ev)
1238 {
1239 return midiseq_out(md, (uint8_t[]){
1240 MIDI_NOTEON | chan, key, ev->c_NOTEON.velocity & 0x7f}, 3, 1);
1241 }
1242
1243 static int
1244 midiseq_noteoff(struct midi_dev *md, int chan, int key, seq_event_t *ev)
1245 {
1246 return midiseq_out(md, (uint8_t[]){
1247 MIDI_NOTEOFF | chan, key, ev->c_NOTEOFF.velocity & 0x7f}, 3, 1);
1248 }
1249
1250 static int
1251 midiseq_keypressure(struct midi_dev *md, int chan, int key, seq_event_t *ev)
1252 {
1253 return midiseq_out(md, (uint8_t[]){
1254 MIDI_KEY_PRESSURE | chan, key,
1255 ev->c_KEY_PRESSURE.pressure & 0x7f}, 3, 1);
1256 }
1257
1258 static int
1259 midiseq_pgmchange(struct midi_dev *md, int chan, seq_event_t *ev)
1260 {
1261 if (ev->c_PGM_CHANGE.program > 127)
1262 return EINVAL;
1263 return midiseq_out(md, (uint8_t[]){
1264 MIDI_PGM_CHANGE | chan, ev->c_PGM_CHANGE.program}, 2, 1);
1265 }
1266
1267 static int
1268 midiseq_chnpressure(struct midi_dev *md, int chan, seq_event_t *ev)
1269 {
1270 if (ev->c_CHN_PRESSURE.pressure > 127)
1271 return EINVAL;
1272 return midiseq_out(md, (uint8_t[]){
1273 MIDI_CHN_PRESSURE | chan, ev->c_CHN_PRESSURE.pressure}, 2, 1);
1274 }
1275
1276 static int
1277 midiseq_ctlchange(struct midi_dev *md, int chan, seq_event_t *ev)
1278 {
1279 if (ev->c_CTL_CHANGE.controller > 127)
1280 return EINVAL;
1281 return midiseq_out( md, (uint8_t[]){
1282 MIDI_CTL_CHANGE | chan, ev->c_CTL_CHANGE.controller,
1283 ev->c_CTL_CHANGE.value & 0x7f /* XXX this is SO wrong */
1284 }, 3, 1);
1285 }
1286
1287 static int
1288 midiseq_pitchbend(struct midi_dev *md, int chan, seq_event_t *ev)
1289 {
1290 return midiseq_out(md, (uint8_t[]){
1291 MIDI_PITCH_BEND | chan,
1292 ev->c_PITCH_BEND.value & 0x7f,
1293 (ev->c_PITCH_BEND.value >> 7) & 0x7f}, 3, 1);
1294 }
1295
1296 static int
1297 midiseq_loadpatch(struct midi_dev *md,
1298 struct sysex_info *sysex, struct uio *uio)
1299 {
1300 u_char c, bf[128];
1301 int i, cc, error;
1302
1303 if (sysex->key != SEQ_SYSEX_PATCH) {
1304 DPRINTFN(-1,("midiseq_loadpatch: bad patch key 0x%04x\n",
1305 sysex->key));
1306 return (EINVAL);
1307 }
1308 if (uio->uio_resid < sysex->len)
1309 /* adjust length, should be an error */
1310 sysex->len = uio->uio_resid;
1311
1312 DPRINTFN(2, ("midiseq_loadpatch: len=%d\n", sysex->len));
1313 if (sysex->len == 0)
1314 return EINVAL;
1315 error = uiomove(&c, 1, uio);
1316 if (error)
1317 return error;
1318 if (c != MIDI_SYSEX_START) /* must start like this */
1319 return EINVAL;
1320 error = midiseq_out(md, &c, 1, 0);
1321 if (error)
1322 return error;
1323 --sysex->len;
1324 while (sysex->len > 0) {
1325 cc = sysex->len;
1326 if (cc > sizeof bf)
1327 cc = sizeof bf;
1328 error = uiomove(bf, cc, uio);
1329 if (error)
1330 break;
1331 for(i = 0; i < cc && !MIDI_IS_STATUS(bf[i]); i++)
1332 ;
1333 /*
1334 * XXX midi(4)'s buffer might not accommodate this, and the
1335 * function will not block us (though in this case we have
1336 * a process and could in principle block).
1337 */
1338 error = midiseq_out(md, bf, i, 0);
1339 if (error)
1340 break;
1341 sysex->len -= i;
1342 if (i != cc)
1343 break;
1344 }
1345 /*
1346 * Any leftover data in uio is rubbish;
1347 * the SYSEX should be one write ending in SYSEX_END.
1348 */
1349 uio->uio_resid = 0;
1350 c = MIDI_SYSEX_END;
1351 return midiseq_out(md, &c, 1, 0);
1352 }
1353
1354 #include "midi.h"
1355 #if NMIDI == 0
1356 static dev_type_open(midiopen);
1357 static dev_type_close(midiclose);
1358
1359 const struct cdevsw midi_cdevsw = {
1360 midiopen, midiclose, noread, nowrite, noioctl,
1361 nostop, notty, nopoll, nommap, nokqfilter, D_OTHER
1362 };
1363
1364 /*
1365 * If someone has a sequencer, but no midi devices there will
1366 * be unresolved references, so we provide little stubs.
1367 */
1368
1369 int
1370 midi_unit_count(void)
1371 {
1372 return (0);
1373 }
1374
1375 static int
1376 midiopen(dev_t dev, int flags, int ifmt, struct lwp *l)
1377 {
1378 return (ENXIO);
1379 }
1380
1381 struct cfdriver midi_cd;
1382
1383 void
1384 midi_getinfo(dev_t dev, struct midi_info *mi)
1385 {
1386 mi->name = "Dummy MIDI device";
1387 mi->props = 0;
1388 }
1389
1390 static int
1391 midiclose(dev_t dev, int flags, int ifmt, struct lwp *l)
1392 {
1393 return (ENXIO);
1394 }
1395
1396 int
1397 midi_writebytes(int unit, u_char *bf, int cc)
1398 {
1399 return (ENXIO);
1400 }
1401 #endif /* NMIDI == 0 */
NetBSD on the FriendlyARM MINI2440