1 /* $NetBSD: sequencer.c,v 1.59 2014/07/25 08:10:35 dholland Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2008 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) and by Andrew Doran. 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 /* 33 * Locking: 34 * 35 * o sc_lock: provides atomic access to all data structures. Taken from 36 * both process and soft interrupt context. 37 * 38 * o sc_dvlock: serializes operations on /dev/sequencer. Taken from 39 * process context. Dropped while waiting for data in sequencerread() 40 * to allow concurrent reads/writes while no data available. 41 * 42 * o sc_isopen: we allow only one concurrent open, only to prevent user 43 * and/or application error. 44 * 45 * o MIDI softc locks. These can be spinlocks and there can be many of 46 * them, because we can open many MIDI devices. We take these only in two 47 * places: when enabling redirection from the MIDI device and when 48 * disabling it (open/close). midiseq_in() is called by the MIDI driver 49 * with its own lock held when passing data into this module. To avoid 50 * lock order and context problems, we package the received message as a 51 * sequencer_pcqitem_t and put onto a producer-consumer queue. A soft 52 * interrupt is scheduled to dequeue and decode the message later where we 53 * can safely acquire the sequencer device's sc_lock. PCQ is lockless for 54 * multiple producer, single consumer settings like this one. 55 */ 56 57 #include <sys/cdefs.h> 58 __KERNEL_RCSID(0, "$NetBSD: sequencer.c,v 1.59 2014/07/25 08:10:35 dholland Exp $"); 59 60 #include "sequencer.h" 61 62 #include <sys/param.h> 63 #include <sys/ioctl.h> 64 #include <sys/fcntl.h> 65 #include <sys/vnode.h> 66 #include <sys/select.h> 67 #include <sys/poll.h> 68 #include <sys/kmem.h> 69 #include <sys/proc.h> 70 #include <sys/systm.h> 71 #include <sys/syslog.h> 72 #include <sys/kernel.h> 73 #include <sys/signalvar.h> 74 #include <sys/conf.h> 75 #include <sys/audioio.h> 76 #include <sys/midiio.h> 77 #include <sys/device.h> 78 #include <sys/intr.h> 79 #include <sys/atomic.h> 80 #include <sys/pcq.h> 81 #include <sys/vnode.h> 82 #include <sys/kauth.h> 83 84 #include <dev/midi_if.h> 85 #include <dev/midivar.h> 86 #include <dev/sequencervar.h> 87 88 #define ADDTIMEVAL(a, b) ( \ 89 (a)->tv_sec += (b)->tv_sec, \ 90 (a)->tv_usec += (b)->tv_usec, \ 91 (a)->tv_usec > 1000000 ? ((a)->tv_sec++, (a)->tv_usec -= 1000000) : 0\ 92 ) 93 94 #define SUBTIMEVAL(a, b) ( \ 95 (a)->tv_sec -= (b)->tv_sec, \ 96 (a)->tv_usec -= (b)->tv_usec, \ 97 (a)->tv_usec < 0 ? ((a)->tv_sec--, (a)->tv_usec += 1000000) : 0\ 98 ) 99 100 #ifdef AUDIO_DEBUG 101 #define DPRINTF(x) if (sequencerdebug) printf x 102 #define DPRINTFN(n,x) if (sequencerdebug >= (n)) printf x 103 int sequencerdebug = 0; 104 #else 105 #define DPRINTF(x) 106 #define DPRINTFN(n,x) 107 #endif 108 109 #define SEQ_NOTE_MAX 128 110 #define SEQ_NOTE_XXX 255 111 112 #define RECALC_USPERDIV(t) \ 113 ((t)->usperdiv = 60*1000000L/((t)->tempo_beatpermin*(t)->timebase_divperbeat)) 114 115 typedef union sequencer_pcqitem { 116 void *qi_ptr; 117 char qi_msg[4]; 118 } sequencer_pcqitem_t; 119 120 void sequencerattach(int); 121 static void seq_reset(struct sequencer_softc *); 122 static int seq_do_command(struct sequencer_softc *, seq_event_t *); 123 static int seq_do_chnvoice(struct sequencer_softc *, seq_event_t *); 124 static int seq_do_chncommon(struct sequencer_softc *, seq_event_t *); 125 static void seq_timer_waitabs(struct sequencer_softc *, uint32_t); 126 static int seq_do_timing(struct sequencer_softc *, seq_event_t *); 127 static int seq_do_local(struct sequencer_softc *, seq_event_t *); 128 static int seq_do_sysex(struct sequencer_softc *, seq_event_t *); 129 static int seq_do_fullsize(struct sequencer_softc *, seq_event_t *, struct uio *); 130 static int seq_input_event(struct sequencer_softc *, seq_event_t *); 131 static int seq_drain(struct sequencer_softc *); 132 static void seq_startoutput(struct sequencer_softc *); 133 static void seq_timeout(void *); 134 static int seq_to_new(seq_event_t *, struct uio *); 135 static void seq_softintr(void *); 136 137 static int midiseq_out(struct midi_dev *, u_char *, u_int, int); 138 static struct midi_dev *midiseq_open(int, int); 139 static void midiseq_close(struct midi_dev *); 140 static void midiseq_reset(struct midi_dev *); 141 static int midiseq_noteon(struct midi_dev *, int, int, seq_event_t *); 142 static int midiseq_noteoff(struct midi_dev *, int, int, seq_event_t *); 143 static int midiseq_keypressure(struct midi_dev *, int, int, seq_event_t *); 144 static int midiseq_pgmchange(struct midi_dev *, int, seq_event_t *); 145 static int midiseq_chnpressure(struct midi_dev *, int, seq_event_t *); 146 static int midiseq_ctlchange(struct midi_dev *, int, seq_event_t *); 147 static int midiseq_pitchbend(struct midi_dev *, int, seq_event_t *); 148 static int midiseq_loadpatch(struct midi_dev *, struct sysex_info *, struct uio *); 149 void midiseq_in(struct midi_dev *, u_char *, int); 150 151 static dev_type_open(sequenceropen); 152 static dev_type_close(sequencerclose); 153 static dev_type_read(sequencerread); 154 static dev_type_write(sequencerwrite); 155 static dev_type_ioctl(sequencerioctl); 156 static dev_type_poll(sequencerpoll); 157 static dev_type_kqfilter(sequencerkqfilter); 158 159 const struct cdevsw sequencer_cdevsw = { 160 .d_open = sequenceropen, 161 .d_close = sequencerclose, 162 .d_read = sequencerread, 163 .d_write = sequencerwrite, 164 .d_ioctl = sequencerioctl, 165 .d_stop = nostop, 166 .d_tty = notty, 167 .d_poll = sequencerpoll, 168 .d_mmap = nommap, 169 .d_kqfilter = sequencerkqfilter, 170 .d_discard = nodiscard, 171 .d_flag = D_OTHER | D_MPSAFE 172 }; 173 static LIST_HEAD(, sequencer_softc) sequencers = LIST_HEAD_INITIALIZER(sequencers); 174 static kmutex_t sequencer_lock; 175 176 static void 177 sequencerdestroy(struct sequencer_softc *sc) { 178 callout_destroy(&sc->sc_callout); 179 softint_disestablish(sc->sih); 180 cv_destroy(&sc->rchan); 181 cv_destroy(&sc->wchan); 182 cv_destroy(&sc->lchan); 183 if (sc->pcq) 184 pcq_destroy(sc->pcq); 185 kmem_free(sc, sizeof(*sc)); 186 } 187 188 static struct sequencer_softc * 189 sequencercreate(int unit) { 190 struct sequencer_softc *sc = kmem_zalloc(sizeof(*sc), KM_SLEEP); 191 if (sc == NULL) { 192 #ifdef DIAGNOSTIC 193 printf("%s: out of memory\n", __func__); 194 #endif 195 return NULL; 196 } 197 sc->sc_unit = unit; 198 callout_init(&sc->sc_callout, CALLOUT_MPSAFE); 199 sc->sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 200 seq_softintr, sc); 201 mutex_init(&sc->lock, MUTEX_DEFAULT, IPL_NONE); 202 cv_init(&sc->rchan, "midiseqr"); 203 cv_init(&sc->wchan, "midiseqw"); 204 cv_init(&sc->lchan, "midiseql"); 205 sc->pcq = pcq_create(SEQ_MAXQ, KM_SLEEP); 206 if (sc->pcq == NULL) { 207 sequencerdestroy(sc); 208 return NULL; 209 } 210 return sc; 211 } 212 213 214 static struct sequencer_softc * 215 sequencerget(int unit) { 216 struct sequencer_softc *sc; 217 if (unit < 0) { 218 #ifdef DIAGNOSTIC 219 panic("%s: unit %d!", __func__, unit); 220 #endif 221 return NULL; 222 } 223 mutex_enter(&sequencer_lock); 224 LIST_FOREACH(sc, &sequencers, sc_link) { 225 if (sc->sc_unit == unit) { 226 mutex_exit(&sequencer_lock); 227 return sc; 228 } 229 } 230 mutex_exit(&sequencer_lock); 231 if ((sc = sequencercreate(unit)) == NULL) 232 return NULL; 233 mutex_enter(&sequencer_lock); 234 LIST_INSERT_HEAD(&sequencers, sc, sc_link); 235 mutex_exit(&sequencer_lock); 236 return sc; 237 } 238 239 #ifdef notyet 240 static void 241 sequencerput(struct sequencer_softc *sc) { 242 mutex_enter(&sequencer_lock); 243 LIST_REMOVE(sc, sc_link); 244 mutex_exit(&sequencer_lock); 245 sequencerdestroy(sc); 246 } 247 #endif 248 249 void 250 sequencerattach(int n) 251 { 252 mutex_init(&sequencer_lock, MUTEX_DEFAULT, IPL_NONE); 253 } 254 255 /* 256 * Release reference to device acquired with sequencer_enter(). 257 */ 258 static void 259 sequencer_exit(struct sequencer_softc *sc) 260 { 261 262 sc->dvlock--; 263 cv_broadcast(&sc->lchan); 264 mutex_exit(&sc->lock); 265 } 266 267 /* 268 * Look up sequencer device and acquire locks for device access. 269 */ 270 static int 271 sequencer_enter(dev_t dev, struct sequencer_softc **scp) 272 { 273 struct sequencer_softc *sc; 274 275 /* First, find the device and take sc_lock. */ 276 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 277 return ENXIO; 278 mutex_enter(&sc->lock); 279 while (sc->dvlock) { 280 cv_wait(&sc->lchan, &sc->lock); 281 } 282 sc->dvlock++; 283 if (sc->dying) { 284 sequencer_exit(sc); 285 return EIO; 286 } 287 *scp = sc; 288 return 0; 289 } 290 291 static int 292 sequenceropen(dev_t dev, int flags, int ifmt, struct lwp *l) 293 { 294 struct sequencer_softc *sc; 295 struct midi_dev *md; 296 struct midi_softc *msc; 297 int error, unit; 298 299 DPRINTF(("sequenceropen\n")); 300 301 if ((error = sequencer_enter(dev, &sc)) != 0) 302 return error; 303 if (sc->isopen != 0) { 304 sequencer_exit(sc); 305 return EBUSY; 306 } 307 308 if (SEQ_IS_OLD(SEQUENCERUNIT(dev))) 309 sc->mode = SEQ_OLD; 310 else 311 sc->mode = SEQ_NEW; 312 sc->isopen++; 313 sc->flags = flags & (FREAD|FWRITE); 314 sc->pbus = 0; 315 sc->async = 0; 316 sc->input_stamp = ~0; 317 318 sc->nmidi = 0; 319 sc->ndevs = midi_unit_count(); 320 sc->timer.timebase_divperbeat = 100; 321 sc->timer.tempo_beatpermin = 60; 322 RECALC_USPERDIV(&sc->timer); 323 sc->timer.divs_lastevent = sc->timer.divs_lastchange = 0; 324 microtime(&sc->timer.reftime); 325 326 SEQ_QINIT(&sc->inq); 327 SEQ_QINIT(&sc->outq); 328 sc->lowat = SEQ_MAXQ / 2; 329 330 if (sc->ndevs > 0) { 331 mutex_exit(&sc->lock); 332 sc->devs = kmem_alloc(sc->ndevs * sizeof(struct midi_dev *), 333 KM_SLEEP); 334 for (unit = 0; unit < sc->ndevs; unit++) { 335 md = midiseq_open(unit, flags); 336 if (md) { 337 sc->devs[sc->nmidi++] = md; 338 md->seq = sc; 339 md->doingsysex = 0; 340 } 341 } 342 mutex_enter(&sc->lock); 343 } else { 344 sc->devs = NULL; 345 } 346 347 /* Only now redirect input from MIDI devices. */ 348 for (unit = 0; unit < sc->nmidi; unit++) { 349 msc = sc->devs[unit]->msc; 350 mutex_enter(msc->lock); 351 msc->seqopen = 1; 352 mutex_exit(msc->lock); 353 } 354 355 seq_reset(sc); 356 sequencer_exit(sc); 357 358 DPRINTF(("%s: mode=%d, nmidi=%d\n", __func__, sc->mode, sc->nmidi)); 359 return 0; 360 } 361 362 static int 363 seq_drain(struct sequencer_softc *sc) 364 { 365 int error; 366 367 KASSERT(mutex_owned(&sc->lock)); 368 369 DPRINTFN(3, ("seq_drain: %p, len=%d\n", sc, SEQ_QLEN(&sc->outq))); 370 seq_startoutput(sc); 371 error = 0; 372 while (!SEQ_QEMPTY(&sc->outq) && !error) 373 error = cv_timedwait_sig(&sc->wchan, &sc->lock, 60*hz); 374 return (error); 375 } 376 377 static void 378 seq_timeout(void *addr) 379 { 380 struct sequencer_softc *sc = addr; 381 proc_t *p; 382 pid_t pid; 383 384 DPRINTFN(4, ("seq_timeout: %p\n", sc)); 385 386 mutex_enter(&sc->lock); 387 if (sc->timeout == 0) { 388 mutex_spin_exit(&sc->lock); 389 return; 390 } 391 sc->timeout = 0; 392 seq_startoutput(sc); 393 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 394 mutex_exit(&sc->lock); 395 return; 396 } 397 cv_broadcast(&sc->wchan); 398 selnotify(&sc->wsel, 0, NOTE_SUBMIT); 399 if ((pid = sc->async) != 0) { 400 mutex_enter(proc_lock); 401 if ((p = proc_find(pid)) != NULL) 402 psignal(p, SIGIO); 403 mutex_exit(proc_lock); 404 } 405 mutex_exit(&sc->lock); 406 } 407 408 static void 409 seq_startoutput(struct sequencer_softc *sc) 410 { 411 struct sequencer_queue *q = &sc->outq; 412 seq_event_t cmd; 413 414 KASSERT(mutex_owned(&sc->lock)); 415 416 if (sc->timeout) 417 return; 418 DPRINTFN(4, ("seq_startoutput: %p, len=%d\n", sc, SEQ_QLEN(q))); 419 while (!SEQ_QEMPTY(q) && !sc->timeout) { 420 SEQ_QGET(q, cmd); 421 seq_do_command(sc, &cmd); 422 } 423 } 424 425 static int 426 sequencerclose(dev_t dev, int flags, int ifmt, struct lwp *l) 427 { 428 struct sequencer_softc *sc; 429 struct midi_softc *msc; 430 int unit, error; 431 432 DPRINTF(("sequencerclose: %"PRIx64"\n", dev)); 433 434 if ((error = sequencer_enter(dev, &sc)) != 0) 435 return error; 436 seq_drain(sc); 437 if (sc->timeout) { 438 callout_halt(&sc->sc_callout, &sc->lock); 439 sc->timeout = 0; 440 } 441 /* Bin input from MIDI devices. */ 442 for (unit = 0; unit < sc->nmidi; unit++) { 443 msc = sc->devs[unit]->msc; 444 mutex_enter(msc->lock); 445 msc->seqopen = 0; 446 mutex_exit(msc->lock); 447 } 448 mutex_exit(&sc->lock); 449 450 for (unit = 0; unit < sc->nmidi; unit++) 451 if (sc->devs[unit] != NULL) 452 midiseq_close(sc->devs[unit]); 453 if (sc->devs != NULL) { 454 KASSERT(sc->ndevs > 0); 455 kmem_free(sc->devs, sc->ndevs * sizeof(struct midi_dev *)); 456 sc->devs = NULL; 457 } 458 459 mutex_enter(&sc->lock); 460 sc->isopen = 0; 461 sequencer_exit(sc); 462 463 DPRINTF(("sequencerclose: %"PRIx64" done\n", dev)); 464 465 return (0); 466 } 467 468 static int 469 seq_input_event(struct sequencer_softc *sc, seq_event_t *cmd) 470 { 471 struct sequencer_queue *q; 472 473 KASSERT(mutex_owned(&sc->lock)); 474 475 DPRINTFN(2, ("seq_input_event: %02x %02x %02x %02x %02x " 476 "%02x %02x %02x\n", cmd->tag, 477 cmd->unknown.byte[0], cmd->unknown.byte[1], 478 cmd->unknown.byte[2], cmd->unknown.byte[3], 479 cmd->unknown.byte[4], cmd->unknown.byte[5], 480 cmd->unknown.byte[6])); 481 q = &sc->inq; 482 if (SEQ_QFULL(q)) 483 return (ENOMEM); 484 SEQ_QPUT(q, *cmd); 485 cv_broadcast(&sc->rchan); 486 selnotify(&sc->rsel, 0, NOTE_SUBMIT); 487 if (sc->async != 0) { 488 proc_t *p; 489 490 mutex_enter(proc_lock); 491 if ((p = proc_find(sc->async)) != NULL) 492 psignal(p, SIGIO); 493 mutex_exit(proc_lock); 494 } 495 return 0; 496 } 497 498 static void 499 seq_softintr(void *addr) 500 { 501 struct sequencer_softc *sc; 502 struct timeval now; 503 seq_event_t ev; 504 int status, chan, unit; 505 sequencer_pcqitem_t qi; 506 u_long t; 507 508 sc = addr; 509 510 mutex_enter(&sc->lock); 511 512 qi.qi_ptr = pcq_get(sc->pcq); 513 if (qi.qi_ptr == NULL) { 514 mutex_exit(&sc->lock); 515 return; 516 } 517 KASSERT((qi.qi_msg[3] & 0x80) != 0); 518 unit = qi.qi_msg[3] & ~0x80; 519 status = MIDI_GET_STATUS(qi.qi_msg[0]); 520 chan = MIDI_GET_CHAN(qi.qi_msg[0]); 521 switch (status) { 522 case MIDI_NOTEON: /* midi(4) always canonicalizes hidden note-off */ 523 ev = SEQ_MK_CHN(NOTEON, .device=unit, .channel=chan, 524 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 525 break; 526 case MIDI_NOTEOFF: 527 ev = SEQ_MK_CHN(NOTEOFF, .device=unit, .channel=chan, 528 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 529 break; 530 case MIDI_KEY_PRESSURE: 531 ev = SEQ_MK_CHN(KEY_PRESSURE, .device=unit, .channel=chan, 532 .key=qi.qi_msg[1], .pressure=qi.qi_msg[2]); 533 break; 534 case MIDI_CTL_CHANGE: /* XXX not correct for MSB */ 535 ev = SEQ_MK_CHN(CTL_CHANGE, .device=unit, .channel=chan, 536 .controller=qi.qi_msg[1], .value=qi.qi_msg[2]); 537 break; 538 case MIDI_PGM_CHANGE: 539 ev = SEQ_MK_CHN(PGM_CHANGE, .device=unit, .channel=chan, 540 .program=qi.qi_msg[1]); 541 break; 542 case MIDI_CHN_PRESSURE: 543 ev = SEQ_MK_CHN(CHN_PRESSURE, .device=unit, .channel=chan, 544 .pressure=qi.qi_msg[1]); 545 break; 546 case MIDI_PITCH_BEND: 547 ev = SEQ_MK_CHN(PITCH_BEND, .device=unit, .channel=chan, 548 .value=(qi.qi_msg[1] & 0x7f) | ((qi.qi_msg[2] & 0x7f) << 7)); 549 break; 550 default: /* this is now the point where MIDI_ACKs disappear */ 551 mutex_exit(&sc->lock); 552 return; 553 } 554 microtime(&now); 555 if (!sc->timer.running) 556 now = sc->timer.stoptime; 557 SUBTIMEVAL(&now, &sc->timer.reftime); 558 t = now.tv_sec * 1000000 + now.tv_usec; 559 t /= sc->timer.usperdiv; 560 t += sc->timer.divs_lastchange; 561 if (t != sc->input_stamp) { 562 seq_input_event(sc, &SEQ_MK_TIMING(WAIT_ABS, .divisions=t)); 563 sc->input_stamp = t; /* XXX wha hoppen if timer is reset? */ 564 } 565 seq_input_event(sc, &ev); 566 mutex_exit(&sc->lock); 567 } 568 569 static int 570 sequencerread(dev_t dev, struct uio *uio, int ioflag) 571 { 572 struct sequencer_softc *sc; 573 struct sequencer_queue *q; 574 seq_event_t ev; 575 int error; 576 577 DPRINTFN(20, ("sequencerread: %"PRIx64", count=%d, ioflag=%x\n", 578 dev, (int)uio->uio_resid, ioflag)); 579 580 if ((error = sequencer_enter(dev, &sc)) != 0) 581 return error; 582 q = &sc->inq; 583 584 if (sc->mode == SEQ_OLD) { 585 sequencer_exit(sc); 586 DPRINTFN(-1,("sequencerread: old read\n")); 587 return EINVAL; /* XXX unimplemented */ 588 } 589 while (SEQ_QEMPTY(q)) { 590 if (ioflag & IO_NDELAY) { 591 error = EWOULDBLOCK; 592 break; 593 } 594 /* Drop lock to allow concurrent read/write. */ 595 KASSERT(sc->dvlock != 0); 596 sc->dvlock--; 597 error = cv_wait_sig(&sc->rchan, &sc->lock); 598 while (sc->dvlock != 0) { 599 cv_wait(&sc->lchan, &sc->lock); 600 } 601 sc->dvlock++; 602 if (error) { 603 break; 604 } 605 } 606 while (uio->uio_resid >= sizeof(ev) && !error && !SEQ_QEMPTY(q)) { 607 SEQ_QGET(q, ev); 608 mutex_exit(&sc->lock); 609 error = uiomove(&ev, sizeof(ev), uio); 610 mutex_enter(&sc->lock); 611 } 612 sequencer_exit(sc); 613 return error; 614 } 615 616 static int 617 sequencerwrite(dev_t dev, struct uio *uio, int ioflag) 618 { 619 struct sequencer_softc *sc; 620 struct sequencer_queue *q; 621 int error; 622 seq_event_t cmdbuf; 623 int size; 624 625 DPRINTFN(2, ("sequencerwrite: %"PRIx64", count=%d\n", dev, 626 (int)uio->uio_resid)); 627 628 if ((error = sequencer_enter(dev, &sc)) != 0) 629 return error; 630 q = &sc->outq; 631 632 size = sc->mode == SEQ_NEW ? sizeof cmdbuf : SEQOLD_CMDSIZE; 633 while (uio->uio_resid >= size && error == 0) { 634 mutex_exit(&sc->lock); 635 error = uiomove(&cmdbuf, size, uio); 636 if (error == 0) { 637 if (sc->mode == SEQ_OLD && seq_to_new(&cmdbuf, uio)) { 638 mutex_enter(&sc->lock); 639 continue; 640 } 641 if (cmdbuf.tag == SEQ_FULLSIZE) { 642 /* We do it like OSS does, asynchronously */ 643 error = seq_do_fullsize(sc, &cmdbuf, uio); 644 if (error == 0) { 645 mutex_enter(&sc->lock); 646 continue; 647 } 648 } 649 } 650 mutex_enter(&sc->lock); 651 if (error != 0) { 652 break; 653 } 654 while (SEQ_QFULL(q)) { 655 seq_startoutput(sc); 656 if (SEQ_QFULL(q)) { 657 if (ioflag & IO_NDELAY) { 658 error = EWOULDBLOCK; 659 break; 660 } 661 error = cv_wait_sig(&sc->wchan, &sc->lock); 662 if (error) { 663 break; 664 } 665 } 666 } 667 if (error == 0) { 668 SEQ_QPUT(q, cmdbuf); 669 } 670 } 671 if (error == 0) { 672 seq_startoutput(sc); 673 } else { 674 DPRINTFN(2, ("sequencerwrite: error=%d\n", error)); 675 } 676 sequencer_exit(sc); 677 return error; 678 } 679 680 static int 681 sequencerioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 682 { 683 struct sequencer_softc *sc; 684 struct synth_info *si; 685 struct midi_dev *md; 686 int devno, error, t; 687 struct timeval now; 688 u_long tx; 689 690 DPRINTFN(2, ("sequencerioctl: %"PRIx64" cmd=0x%08lx\n", dev, cmd)); 691 692 if ((error = sequencer_enter(dev, &sc)) != 0) 693 return error; 694 switch (cmd) { 695 case FIONBIO: 696 /* All handled in the upper FS layer. */ 697 break; 698 699 case FIOASYNC: 700 if (*(int *)addr) { 701 if (sc->async != 0) 702 return EBUSY; 703 sc->async = curproc->p_pid; 704 DPRINTF(("sequencer_ioctl: FIOASYNC %d\n", 705 sc->async)); 706 } else { 707 sc->async = 0; 708 } 709 break; 710 711 case SEQUENCER_RESET: 712 seq_reset(sc); 713 break; 714 715 case SEQUENCER_PANIC: 716 seq_reset(sc); 717 /* Do more? OSS doesn't */ 718 break; 719 720 case SEQUENCER_SYNC: 721 if (sc->flags != FREAD) 722 seq_drain(sc); 723 break; 724 725 case SEQUENCER_INFO: 726 si = (struct synth_info*)addr; 727 devno = si->device; 728 if (devno < 0 || devno >= sc->nmidi) { 729 error = EINVAL; 730 break; 731 } 732 md = sc->devs[devno]; 733 strncpy(si->name, md->name, sizeof si->name); 734 si->synth_type = SYNTH_TYPE_MIDI; 735 si->synth_subtype = md->subtype; 736 si->nr_voices = md->nr_voices; 737 si->instr_bank_size = md->instr_bank_size; 738 si->capabilities = md->capabilities; 739 break; 740 741 case SEQUENCER_NRSYNTHS: 742 *(int *)addr = sc->nmidi; 743 break; 744 745 case SEQUENCER_NRMIDIS: 746 *(int *)addr = sc->nmidi; 747 break; 748 749 case SEQUENCER_OUTOFBAND: 750 DPRINTFN(3, ("sequencer_ioctl: OOB=%02x %02x %02x %02x %02x %02x %02x %02x\n", 751 *(u_char *)addr, *((u_char *)addr+1), 752 *((u_char *)addr+2), *((u_char *)addr+3), 753 *((u_char *)addr+4), *((u_char *)addr+5), 754 *((u_char *)addr+6), *((u_char *)addr+7))); 755 if ((sc->flags & FWRITE) == 0) { 756 error = EBADF; 757 } else { 758 error = seq_do_command(sc, (seq_event_t *)addr); 759 } 760 break; 761 762 case SEQUENCER_TMR_TIMEBASE: 763 t = *(int *)addr; 764 if (t < 1) 765 t = 1; 766 if (t > 10000) 767 t = 10000; 768 *(int *)addr = t; 769 sc->timer.timebase_divperbeat = t; 770 sc->timer.divs_lastchange = sc->timer.divs_lastevent; 771 microtime(&sc->timer.reftime); 772 RECALC_USPERDIV(&sc->timer); 773 break; 774 775 case SEQUENCER_TMR_START: 776 error = seq_do_timing(sc, &SEQ_MK_TIMING(START)); 777 break; 778 779 case SEQUENCER_TMR_STOP: 780 error = seq_do_timing(sc, &SEQ_MK_TIMING(STOP)); 781 break; 782 783 case SEQUENCER_TMR_CONTINUE: 784 error = seq_do_timing(sc, &SEQ_MK_TIMING(CONTINUE)); 785 break; 786 787 case SEQUENCER_TMR_TEMPO: 788 error = seq_do_timing(sc, 789 &SEQ_MK_TIMING(TEMPO, .bpm=*(int *)addr)); 790 if (error == 0) 791 *(int *)addr = sc->timer.tempo_beatpermin; 792 break; 793 794 case SEQUENCER_TMR_SOURCE: 795 *(int *)addr = SEQUENCER_TMR_INTERNAL; 796 break; 797 798 case SEQUENCER_TMR_METRONOME: 799 /* noop */ 800 break; 801 802 case SEQUENCER_THRESHOLD: 803 t = SEQ_MAXQ - *(int *)addr / sizeof (seq_event_rec); 804 if (t < 1) 805 t = 1; 806 if (t > SEQ_MAXQ) 807 t = SEQ_MAXQ; 808 sc->lowat = t; 809 break; 810 811 case SEQUENCER_CTRLRATE: 812 *(int *)addr = (sc->timer.tempo_beatpermin 813 *sc->timer.timebase_divperbeat + 30) / 60; 814 break; 815 816 case SEQUENCER_GETTIME: 817 microtime(&now); 818 SUBTIMEVAL(&now, &sc->timer.reftime); 819 tx = now.tv_sec * 1000000 + now.tv_usec; 820 tx /= sc->timer.usperdiv; 821 tx += sc->timer.divs_lastchange; 822 *(int *)addr = tx; 823 break; 824 825 default: 826 DPRINTFN(-1,("sequencer_ioctl: unimpl %08lx\n", cmd)); 827 error = EINVAL; 828 break; 829 } 830 sequencer_exit(sc); 831 832 return error; 833 } 834 835 static int 836 sequencerpoll(dev_t dev, int events, struct lwp *l) 837 { 838 struct sequencer_softc *sc; 839 int revents = 0; 840 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 841 return ENXIO; 842 843 DPRINTF(("sequencerpoll: %p events=0x%x\n", sc, events)); 844 845 mutex_enter(&sc->lock); 846 if (events & (POLLIN | POLLRDNORM)) 847 if ((sc->flags&FREAD) && !SEQ_QEMPTY(&sc->inq)) 848 revents |= events & (POLLIN | POLLRDNORM); 849 850 if (events & (POLLOUT | POLLWRNORM)) 851 if ((sc->flags&FWRITE) && SEQ_QLEN(&sc->outq) < sc->lowat) 852 revents |= events & (POLLOUT | POLLWRNORM); 853 854 if (revents == 0) { 855 if ((sc->flags&FREAD) && (events & (POLLIN | POLLRDNORM))) 856 selrecord(l, &sc->rsel); 857 858 if ((sc->flags&FWRITE) && (events & (POLLOUT | POLLWRNORM))) 859 selrecord(l, &sc->wsel); 860 } 861 mutex_exit(&sc->lock); 862 863 return revents; 864 } 865 866 static void 867 filt_sequencerrdetach(struct knote *kn) 868 { 869 struct sequencer_softc *sc = kn->kn_hook; 870 871 mutex_enter(&sc->lock); 872 SLIST_REMOVE(&sc->rsel.sel_klist, kn, knote, kn_selnext); 873 mutex_exit(&sc->lock); 874 } 875 876 static int 877 filt_sequencerread(struct knote *kn, long hint) 878 { 879 struct sequencer_softc *sc = kn->kn_hook; 880 int rv; 881 882 if (hint != NOTE_SUBMIT) { 883 mutex_enter(&sc->lock); 884 } 885 if (SEQ_QEMPTY(&sc->inq)) { 886 rv = 0; 887 } else { 888 kn->kn_data = sizeof(seq_event_rec); 889 rv = 1; 890 } 891 if (hint != NOTE_SUBMIT) { 892 mutex_exit(&sc->lock); 893 } 894 return rv; 895 } 896 897 static const struct filterops sequencerread_filtops = 898 { 1, NULL, filt_sequencerrdetach, filt_sequencerread }; 899 900 static void 901 filt_sequencerwdetach(struct knote *kn) 902 { 903 struct sequencer_softc *sc = kn->kn_hook; 904 905 mutex_enter(&sc->lock); 906 SLIST_REMOVE(&sc->wsel.sel_klist, kn, knote, kn_selnext); 907 mutex_exit(&sc->lock); 908 } 909 910 static int 911 filt_sequencerwrite(struct knote *kn, long hint) 912 { 913 struct sequencer_softc *sc = kn->kn_hook; 914 int rv; 915 916 if (hint != NOTE_SUBMIT) { 917 mutex_enter(&sc->lock); 918 } 919 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 920 rv = 0; 921 } else { 922 kn->kn_data = sizeof(seq_event_rec); 923 rv = 1; 924 } 925 if (hint != NOTE_SUBMIT) { 926 mutex_exit(&sc->lock); 927 } 928 return rv; 929 } 930 931 static const struct filterops sequencerwrite_filtops = 932 { 1, NULL, filt_sequencerwdetach, filt_sequencerwrite }; 933 934 static int 935 sequencerkqfilter(dev_t dev, struct knote *kn) 936 { 937 struct sequencer_softc *sc; 938 struct klist *klist; 939 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 940 return ENXIO; 941 942 switch (kn->kn_filter) { 943 case EVFILT_READ: 944 klist = &sc->rsel.sel_klist; 945 kn->kn_fop = &sequencerread_filtops; 946 break; 947 948 case EVFILT_WRITE: 949 klist = &sc->wsel.sel_klist; 950 kn->kn_fop = &sequencerwrite_filtops; 951 break; 952 953 default: 954 return (EINVAL); 955 } 956 957 kn->kn_hook = sc; 958 959 mutex_enter(&sc->lock); 960 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 961 mutex_exit(&sc->lock); 962 963 return (0); 964 } 965 966 static void 967 seq_reset(struct sequencer_softc *sc) 968 { 969 int i, chn; 970 struct midi_dev *md; 971 972 KASSERT(mutex_owned(&sc->lock)); 973 974 if ( !(sc->flags & FWRITE) ) 975 return; 976 for (i = 0; i < sc->nmidi; i++) { 977 md = sc->devs[i]; 978 midiseq_reset(md); 979 for (chn = 0; chn < MAXCHAN; chn++) { 980 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 981 .controller=MIDI_CTRL_NOTES_OFF)); 982 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 983 .controller=MIDI_CTRL_RESET)); 984 midiseq_pitchbend(md, chn, &SEQ_MK_CHN(PITCH_BEND, 985 .value=MIDI_BEND_NEUTRAL)); 986 } 987 } 988 } 989 990 static int 991 seq_do_command(struct sequencer_softc *sc, seq_event_t *b) 992 { 993 int dev; 994 995 KASSERT(mutex_owned(&sc->lock)); 996 997 DPRINTFN(4, ("seq_do_command: %p cmd=0x%02x\n", sc, b->timing.op)); 998 999 switch(b->tag) { 1000 case SEQ_LOCAL: 1001 return seq_do_local(sc, b); 1002 case SEQ_TIMING: 1003 return seq_do_timing(sc, b); 1004 case SEQ_CHN_VOICE: 1005 return seq_do_chnvoice(sc, b); 1006 case SEQ_CHN_COMMON: 1007 return seq_do_chncommon(sc, b); 1008 case SEQ_SYSEX: 1009 return seq_do_sysex(sc, b); 1010 /* COMPAT */ 1011 case SEQOLD_MIDIPUTC: 1012 dev = b->putc.device; 1013 if (dev < 0 || dev >= sc->nmidi) 1014 return (ENXIO); 1015 return midiseq_out(sc->devs[dev], &b->putc.byte, 1, 0); 1016 default: 1017 DPRINTFN(-1,("seq_do_command: unimpl command %02x\n", b->tag)); 1018 return (EINVAL); 1019 } 1020 } 1021 1022 static int 1023 seq_do_chnvoice(struct sequencer_softc *sc, seq_event_t *b) 1024 { 1025 int dev; 1026 int error; 1027 struct midi_dev *md; 1028 1029 KASSERT(mutex_owned(&sc->lock)); 1030 1031 dev = b->voice.device; 1032 if (dev < 0 || dev >= sc->nmidi || 1033 b->voice.channel > 15 || 1034 b->voice.key >= SEQ_NOTE_MAX) 1035 return ENXIO; 1036 md = sc->devs[dev]; 1037 switch(b->voice.op) { 1038 case MIDI_NOTEON: /* no need to special-case hidden noteoff here */ 1039 error = midiseq_noteon(md, b->voice.channel, b->voice.key, b); 1040 break; 1041 case MIDI_NOTEOFF: 1042 error = midiseq_noteoff(md, b->voice.channel, b->voice.key, b); 1043 break; 1044 case MIDI_KEY_PRESSURE: 1045 error = midiseq_keypressure(md, 1046 b->voice.channel, b->voice.key, b); 1047 break; 1048 default: 1049 DPRINTFN(-1,("seq_do_chnvoice: unimpl command %02x\n", 1050 b->voice.op)); 1051 error = EINVAL; 1052 break; 1053 } 1054 return error; 1055 } 1056 1057 static int 1058 seq_do_chncommon(struct sequencer_softc *sc, seq_event_t *b) 1059 { 1060 int dev; 1061 int error; 1062 struct midi_dev *md; 1063 1064 KASSERT(mutex_owned(&sc->lock)); 1065 1066 dev = b->common.device; 1067 if (dev < 0 || dev >= sc->nmidi || 1068 b->common.channel > 15) 1069 return ENXIO; 1070 md = sc->devs[dev]; 1071 DPRINTFN(2,("seq_do_chncommon: %02x\n", b->common.op)); 1072 1073 error = 0; 1074 switch(b->common.op) { 1075 case MIDI_PGM_CHANGE: 1076 error = midiseq_pgmchange(md, b->common.channel, b); 1077 break; 1078 case MIDI_CTL_CHANGE: 1079 error = midiseq_ctlchange(md, b->common.channel, b); 1080 break; 1081 case MIDI_PITCH_BEND: 1082 error = midiseq_pitchbend(md, b->common.channel, b); 1083 break; 1084 case MIDI_CHN_PRESSURE: 1085 error = midiseq_chnpressure(md, b->common.channel, b); 1086 break; 1087 default: 1088 DPRINTFN(-1,("seq_do_chncommon: unimpl command %02x\n", 1089 b->common.op)); 1090 error = EINVAL; 1091 break; 1092 } 1093 return error; 1094 } 1095 1096 static int 1097 seq_do_local(struct sequencer_softc *sc, seq_event_t *b) 1098 { 1099 1100 KASSERT(mutex_owned(&sc->lock)); 1101 1102 return (EINVAL); 1103 } 1104 1105 static int 1106 seq_do_sysex(struct sequencer_softc *sc, seq_event_t *b) 1107 { 1108 int dev, i; 1109 struct midi_dev *md; 1110 uint8_t *bf = b->sysex.buffer; 1111 1112 KASSERT(mutex_owned(&sc->lock)); 1113 1114 dev = b->sysex.device; 1115 if (dev < 0 || dev >= sc->nmidi) 1116 return (ENXIO); 1117 DPRINTF(("seq_do_sysex: dev=%d\n", dev)); 1118 md = sc->devs[dev]; 1119 1120 if (!md->doingsysex) { 1121 midiseq_out(md, (uint8_t[]){MIDI_SYSEX_START}, 1, 0); 1122 md->doingsysex = 1; 1123 } 1124 1125 for (i = 0; i < 6 && bf[i] != 0xff; i++) 1126 ; 1127 midiseq_out(md, bf, i, 0); 1128 if (i < 6 || (i > 0 && bf[i-1] == MIDI_SYSEX_END)) 1129 md->doingsysex = 0; 1130 return 0; 1131 } 1132 1133 static void 1134 seq_timer_waitabs(struct sequencer_softc *sc, uint32_t divs) 1135 { 1136 struct timeval when; 1137 long long usec; 1138 struct syn_timer *t; 1139 int ticks; 1140 1141 KASSERT(mutex_owned(&sc->lock)); 1142 1143 t = &sc->timer; 1144 t->divs_lastevent = divs; 1145 divs -= t->divs_lastchange; 1146 usec = (long long)divs * (long long)t->usperdiv; /* convert to usec */ 1147 when.tv_sec = usec / 1000000; 1148 when.tv_usec = usec % 1000000; 1149 DPRINTFN(4, ("seq_timer_waitabs: adjdivs=%d, sleep when=%"PRId64".%06"PRId64, 1150 divs, when.tv_sec, (uint64_t)when.tv_usec)); 1151 ADDTIMEVAL(&when, &t->reftime); /* abstime for end */ 1152 ticks = tvhzto(&when); 1153 DPRINTFN(4, (" when+start=%"PRId64".%06"PRId64", tick=%d\n", 1154 when.tv_sec, (uint64_t)when.tv_usec, ticks)); 1155 if (ticks > 0) { 1156 #ifdef DIAGNOSTIC 1157 if (ticks > 20 * hz) { 1158 /* Waiting more than 20s */ 1159 printf("seq_timer_waitabs: funny ticks=%d, " 1160 "usec=%lld\n", ticks, usec); 1161 } 1162 #endif 1163 sc->timeout = 1; 1164 callout_reset(&sc->sc_callout, ticks, 1165 seq_timeout, sc); 1166 } 1167 #ifdef SEQUENCER_DEBUG 1168 else if (tick < 0) 1169 DPRINTF(("seq_timer_waitabs: ticks = %d\n", ticks)); 1170 #endif 1171 } 1172 1173 static int 1174 seq_do_timing(struct sequencer_softc *sc, seq_event_t *b) 1175 { 1176 struct syn_timer *t = &sc->timer; 1177 struct timeval when; 1178 int error; 1179 1180 KASSERT(mutex_owned(&sc->lock)); 1181 1182 error = 0; 1183 switch(b->timing.op) { 1184 case TMR_WAIT_REL: 1185 seq_timer_waitabs(sc, 1186 b->t_WAIT_REL.divisions + t->divs_lastevent); 1187 break; 1188 case TMR_WAIT_ABS: 1189 seq_timer_waitabs(sc, b->t_WAIT_ABS.divisions); 1190 break; 1191 case TMR_START: 1192 microtime(&t->reftime); 1193 t->divs_lastevent = t->divs_lastchange = 0; 1194 t->running = 1; 1195 break; 1196 case TMR_STOP: 1197 microtime(&t->stoptime); 1198 t->running = 0; 1199 break; 1200 case TMR_CONTINUE: 1201 if (t->running) 1202 break; 1203 microtime(&when); 1204 SUBTIMEVAL(&when, &t->stoptime); 1205 ADDTIMEVAL(&t->reftime, &when); 1206 t->running = 1; 1207 break; 1208 case TMR_TEMPO: 1209 /* bpm is unambiguously MIDI clocks per minute / 24 */ 1210 /* (24 MIDI clocks are usually but not always a quarter note) */ 1211 if (b->t_TEMPO.bpm < 8) /* where are these limits specified? */ 1212 t->tempo_beatpermin = 8; 1213 else if (b->t_TEMPO.bpm > 360) /* ? */ 1214 t->tempo_beatpermin = 360; 1215 else 1216 t->tempo_beatpermin = b->t_TEMPO.bpm; 1217 t->divs_lastchange = t->divs_lastevent; 1218 microtime(&t->reftime); 1219 RECALC_USPERDIV(t); 1220 break; 1221 case TMR_ECHO: 1222 error = seq_input_event(sc, b); 1223 break; 1224 case TMR_RESET: 1225 t->divs_lastevent = t->divs_lastchange = 0; 1226 microtime(&t->reftime); 1227 break; 1228 case TMR_SPP: 1229 case TMR_TIMESIG: 1230 DPRINTF(("seq_do_timing: unimplemented %02x\n", b->timing.op)); 1231 error = EINVAL; /* not quite accurate... */ 1232 break; 1233 default: 1234 DPRINTF(("seq_timer: unknown %02x\n", b->timing.op)); 1235 error = EINVAL; 1236 break; 1237 } 1238 return (error); 1239 } 1240 1241 static int 1242 seq_do_fullsize(struct sequencer_softc *sc, seq_event_t *b, struct uio *uio) 1243 { 1244 struct sysex_info sysex; 1245 u_int dev; 1246 1247 #ifdef DIAGNOSTIC 1248 if (sizeof(seq_event_rec) != SEQ_SYSEX_HDRSIZE) { 1249 printf("seq_do_fullsize: sysex size ??\n"); 1250 return EINVAL; 1251 } 1252 #endif 1253 memcpy(&sysex, b, sizeof sysex); 1254 dev = sysex.device_no; 1255 if (/* dev < 0 || */ dev >= sc->nmidi) 1256 return (ENXIO); 1257 DPRINTFN(2, ("seq_do_fullsize: fmt=%04x, dev=%d, len=%d\n", 1258 sysex.key, dev, sysex.len)); 1259 return (midiseq_loadpatch(sc->devs[dev], &sysex, uio)); 1260 } 1261 1262 /* 1263 * Convert an old sequencer event to a new one. 1264 * NOTE: on entry, *ev may contain valid data only in the first 4 bytes. 1265 * That may be true even on exit (!) in the case of SEQOLD_MIDIPUTC; the 1266 * caller will only look at the first bytes in that case anyway. Ugly? Sure. 1267 */ 1268 static int 1269 seq_to_new(seq_event_t *ev, struct uio *uio) 1270 { 1271 int cmd, chan, note, parm; 1272 uint32_t tmp_delay; 1273 int error; 1274 uint8_t *bfp; 1275 1276 cmd = ev->tag; 1277 bfp = ev->unknown.byte; 1278 chan = *bfp++; 1279 note = *bfp++; 1280 parm = *bfp++; 1281 DPRINTFN(3, ("seq_to_new: 0x%02x %d %d %d\n", cmd, chan, note, parm)); 1282 1283 if (cmd >= 0x80) { 1284 /* Fill the event record */ 1285 if (uio->uio_resid >= sizeof *ev - SEQOLD_CMDSIZE) { 1286 error = uiomove(bfp, sizeof *ev - SEQOLD_CMDSIZE, uio); 1287 if (error) 1288 return error; 1289 } else 1290 return EINVAL; 1291 } 1292 1293 switch(cmd) { 1294 case SEQOLD_NOTEOFF: 1295 /* 1296 * What's with the SEQ_NOTE_XXX? In OSS this seems to have 1297 * been undocumented magic for messing with the overall volume 1298 * of a 'voice', equated precariously with 'channel' and 1299 * pretty much unimplementable except by directly frobbing a 1300 * synth chip. For us, who treat everything as interfaced over 1301 * MIDI, this will just be unceremoniously discarded as 1302 * invalid in midiseq_noteoff, making the whole event an 1303 * elaborate no-op, and that doesn't seem to be any different 1304 * from what happens on linux with a MIDI-interfaced device, 1305 * by the way. The moral is ... use the new /dev/music API, ok? 1306 */ 1307 *ev = SEQ_MK_CHN(NOTEOFF, .device=0, .channel=chan, 1308 .key=SEQ_NOTE_XXX, .velocity=parm); 1309 break; 1310 case SEQOLD_NOTEON: 1311 *ev = SEQ_MK_CHN(NOTEON, 1312 .device=0, .channel=chan, .key=note, .velocity=parm); 1313 break; 1314 case SEQOLD_WAIT: 1315 /* 1316 * This event cannot even /exist/ on non-littleendian machines, 1317 * and so help me, that's exactly the way OSS defined it. 1318 * Also, the OSS programmer's guide states (p. 74, v1.11) 1319 * that seqold time units are system clock ticks, unlike 1320 * the new 'divisions' which are determined by timebase. In 1321 * that case we would need to do scaling here - but no such 1322 * behavior is visible in linux either--which also treats this 1323 * value, surprisingly, as an absolute, not relative, time. 1324 * My guess is that this event has gone unused so long that 1325 * nobody could agree we got it wrong no matter what we do. 1326 */ 1327 tmp_delay = *(uint32_t *)ev >> 8; 1328 *ev = SEQ_MK_TIMING(WAIT_ABS, .divisions=tmp_delay); 1329 break; 1330 case SEQOLD_SYNCTIMER: 1331 /* 1332 * The TMR_RESET event is not defined in any OSS materials 1333 * I can find; it may have been invented here just to provide 1334 * an accurate _to_new translation of this event. 1335 */ 1336 *ev = SEQ_MK_TIMING(RESET); 1337 break; 1338 case SEQOLD_PGMCHANGE: 1339 *ev = SEQ_MK_CHN(PGM_CHANGE, 1340 .device=0, .channel=chan, .program=note); 1341 break; 1342 case SEQOLD_MIDIPUTC: 1343 break; /* interpret in normal mode */ 1344 case SEQOLD_ECHO: 1345 case SEQOLD_PRIVATE: 1346 case SEQOLD_EXTENDED: 1347 default: 1348 DPRINTF(("seq_to_new: not impl 0x%02x\n", cmd)); 1349 return EINVAL; 1350 /* In case new-style events show up */ 1351 case SEQ_TIMING: 1352 case SEQ_CHN_VOICE: 1353 case SEQ_CHN_COMMON: 1354 case SEQ_FULLSIZE: 1355 break; 1356 } 1357 return 0; 1358 } 1359 1360 /**********************************************/ 1361 1362 void 1363 midiseq_in(struct midi_dev *md, u_char *msg, int len) 1364 { 1365 struct sequencer_softc *sc; 1366 sequencer_pcqitem_t qi; 1367 1368 DPRINTFN(2, ("midiseq_in: %p %02x %02x %02x\n", 1369 md, msg[0], msg[1], msg[2])); 1370 1371 sc = md->seq; 1372 1373 qi.qi_msg[0] = msg[0]; 1374 qi.qi_msg[1] = msg[1]; 1375 qi.qi_msg[2] = msg[2]; 1376 qi.qi_msg[3] = md->unit | 0x80; /* ensure non-zero value of qi_ptr */ 1377 pcq_put(sc->pcq, qi.qi_ptr); 1378 softint_schedule(sc->sih); 1379 } 1380 1381 static struct midi_dev * 1382 midiseq_open(int unit, int flags) 1383 { 1384 extern struct cfdriver midi_cd; 1385 int error; 1386 struct midi_dev *md; 1387 struct midi_softc *sc; 1388 struct midi_info mi; 1389 int major; 1390 dev_t dev; 1391 vnode_t *vp; 1392 int oflags; 1393 1394 major = devsw_name2chr("midi", NULL, 0); 1395 dev = makedev(major, unit); 1396 1397 DPRINTFN(2, ("midiseq_open: %d %d\n", unit, flags)); 1398 1399 error = cdevvp(dev, &vp); 1400 if (error) 1401 return NULL; 1402 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1403 error = VOP_OPEN(vp, flags, kauth_cred_get()); 1404 VOP_UNLOCK(vp); 1405 if (error) { 1406 vrele(vp); 1407 return NULL; 1408 } 1409 1410 /* Only after we have acquired reference via VOP_OPEN(). */ 1411 midi_getinfo(dev, &mi); 1412 oflags = flags; 1413 if ((mi.props & MIDI_PROP_CAN_INPUT) == 0) 1414 flags &= ~FREAD; 1415 if ((flags & (FREAD|FWRITE)) == 0) { 1416 VOP_CLOSE(vp, oflags, kauth_cred_get()); 1417 vrele(vp); 1418 return NULL; 1419 } 1420 1421 sc = device_lookup_private(&midi_cd, unit); 1422 md = kmem_zalloc(sizeof(*md), KM_SLEEP); 1423 md->msc = sc; 1424 md->unit = unit; 1425 md->name = mi.name; 1426 md->subtype = 0; 1427 md->nr_voices = 128; /* XXX */ 1428 md->instr_bank_size = 128; /* XXX */ 1429 md->vp = vp; 1430 if (mi.props & MIDI_PROP_CAN_INPUT) 1431 md->capabilities |= SYNTH_CAP_INPUT; 1432 sc->seq_md = md; 1433 return (md); 1434 } 1435 1436 static void 1437 midiseq_close(struct midi_dev *md) 1438 { 1439 DPRINTFN(2, ("midiseq_close: %d\n", md->unit)); 1440 (void)vn_close(md->vp, 0, kauth_cred_get()); 1441 kmem_free(md, sizeof(*md)); 1442 } 1443 1444 static void 1445 midiseq_reset(struct midi_dev *md) 1446 { 1447 /* XXX send GM reset? */ 1448 DPRINTFN(3, ("midiseq_reset: %d\n", md->unit)); 1449 } 1450 1451 static int 1452 midiseq_out(struct midi_dev *md, u_char *bf, u_int cc, int chk) 1453 { 1454 DPRINTFN(5, ("midiseq_out: m=%p, unit=%d, bf[0]=0x%02x, cc=%d\n", 1455 md->msc, md->unit, bf[0], cc)); 1456 1457 /* midi(4) does running status compression where appropriate. */ 1458 return midi_writebytes(md->unit, bf, cc); 1459 } 1460 1461 /* 1462 * If the writing process hands us a hidden note-off in a note-on event, 1463 * we will simply write it that way; no need to special case it here, 1464 * as midi(4) will always canonicalize or compress as appropriate anyway. 1465 */ 1466 static int 1467 midiseq_noteon(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1468 { 1469 return midiseq_out(md, (uint8_t[]){ 1470 MIDI_NOTEON | chan, key, ev->c_NOTEON.velocity & 0x7f}, 3, 1); 1471 } 1472 1473 static int 1474 midiseq_noteoff(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1475 { 1476 return midiseq_out(md, (uint8_t[]){ 1477 MIDI_NOTEOFF | chan, key, ev->c_NOTEOFF.velocity & 0x7f}, 3, 1); 1478 } 1479 1480 static int 1481 midiseq_keypressure(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1482 { 1483 return midiseq_out(md, (uint8_t[]){ 1484 MIDI_KEY_PRESSURE | chan, key, 1485 ev->c_KEY_PRESSURE.pressure & 0x7f}, 3, 1); 1486 } 1487 1488 static int 1489 midiseq_pgmchange(struct midi_dev *md, int chan, seq_event_t *ev) 1490 { 1491 if (ev->c_PGM_CHANGE.program > 127) 1492 return EINVAL; 1493 return midiseq_out(md, (uint8_t[]){ 1494 MIDI_PGM_CHANGE | chan, ev->c_PGM_CHANGE.program}, 2, 1); 1495 } 1496 1497 static int 1498 midiseq_chnpressure(struct midi_dev *md, int chan, seq_event_t *ev) 1499 { 1500 if (ev->c_CHN_PRESSURE.pressure > 127) 1501 return EINVAL; 1502 return midiseq_out(md, (uint8_t[]){ 1503 MIDI_CHN_PRESSURE | chan, ev->c_CHN_PRESSURE.pressure}, 2, 1); 1504 } 1505 1506 static int 1507 midiseq_ctlchange(struct midi_dev *md, int chan, seq_event_t *ev) 1508 { 1509 if (ev->c_CTL_CHANGE.controller > 127) 1510 return EINVAL; 1511 return midiseq_out( md, (uint8_t[]){ 1512 MIDI_CTL_CHANGE | chan, ev->c_CTL_CHANGE.controller, 1513 ev->c_CTL_CHANGE.value & 0x7f /* XXX this is SO wrong */ 1514 }, 3, 1); 1515 } 1516 1517 static int 1518 midiseq_pitchbend(struct midi_dev *md, int chan, seq_event_t *ev) 1519 { 1520 return midiseq_out(md, (uint8_t[]){ 1521 MIDI_PITCH_BEND | chan, 1522 ev->c_PITCH_BEND.value & 0x7f, 1523 (ev->c_PITCH_BEND.value >> 7) & 0x7f}, 3, 1); 1524 } 1525 1526 static int 1527 midiseq_loadpatch(struct midi_dev *md, 1528 struct sysex_info *sysex, struct uio *uio) 1529 { 1530 struct sequencer_softc *sc; 1531 u_char c, bf[128]; 1532 int i, cc, error; 1533 1534 if (sysex->key != SEQ_SYSEX_PATCH) { 1535 DPRINTFN(-1,("midiseq_loadpatch: bad patch key 0x%04x\n", 1536 sysex->key)); 1537 return (EINVAL); 1538 } 1539 if (uio->uio_resid < sysex->len) 1540 /* adjust length, should be an error */ 1541 sysex->len = uio->uio_resid; 1542 1543 DPRINTFN(2, ("midiseq_loadpatch: len=%d\n", sysex->len)); 1544 if (sysex->len == 0) 1545 return EINVAL; 1546 error = uiomove(&c, 1, uio); 1547 if (error) 1548 return error; 1549 if (c != MIDI_SYSEX_START) /* must start like this */ 1550 return EINVAL; 1551 sc = md->seq; 1552 mutex_enter(&sc->lock); 1553 error = midiseq_out(md, &c, 1, 0); 1554 mutex_exit(&sc->lock); 1555 if (error) 1556 return error; 1557 --sysex->len; 1558 while (sysex->len > 0) { 1559 cc = sysex->len; 1560 if (cc > sizeof bf) 1561 cc = sizeof bf; 1562 error = uiomove(bf, cc, uio); 1563 if (error) 1564 break; 1565 for(i = 0; i < cc && !MIDI_IS_STATUS(bf[i]); i++) 1566 ; 1567 /* 1568 * XXX midi(4)'s buffer might not accommodate this, and the 1569 * function will not block us (though in this case we have 1570 * a process and could in principle block). 1571 */ 1572 mutex_enter(&sc->lock); 1573 error = midiseq_out(md, bf, i, 0); 1574 mutex_exit(&sc->lock); 1575 if (error) 1576 break; 1577 sysex->len -= i; 1578 if (i != cc) 1579 break; 1580 } 1581 /* 1582 * Any leftover data in uio is rubbish; 1583 * the SYSEX should be one write ending in SYSEX_END. 1584 */ 1585 uio->uio_resid = 0; 1586 c = MIDI_SYSEX_END; 1587 mutex_enter(&sc->lock); 1588 error = midiseq_out(md, &c, 1, 0); 1589 mutex_exit(&sc->lock); 1590 return error; 1591 } 1592 1593 #include "midi.h" 1594 #if NMIDI == 0 1595 static dev_type_open(midiopen); 1596 static dev_type_close(midiclose); 1597 1598 const struct cdevsw midi_cdevsw = { 1599 .d_open = midiopen, 1600 .d_close = midiclose, 1601 .d_read = noread, 1602 .d_write = nowrite, 1603 .d_ioctl = noioctl, 1604 .d_stop = nostop, 1605 .d_tty = notty, 1606 .d_poll = nopoll, 1607 .d_mmap = nommap, 1608 .d_kqfilter = nokqfilter, 1609 .d_discard = nodiscard, 1610 .d_flag = D_OTHER | D_MPSAFE 1611 }; 1612 1613 /* 1614 * If someone has a sequencer, but no midi devices there will 1615 * be unresolved references, so we provide little stubs. 1616 */ 1617 1618 int 1619 midi_unit_count(void) 1620 { 1621 return (0); 1622 } 1623 1624 static int 1625 midiopen(dev_t dev, int flags, int ifmt, struct lwp *l) 1626 { 1627 return (ENXIO); 1628 } 1629 1630 struct cfdriver midi_cd; 1631 1632 void 1633 midi_getinfo(dev_t dev, struct midi_info *mi) 1634 { 1635 mi->name = "Dummy MIDI device"; 1636 mi->props = 0; 1637 } 1638 1639 static int 1640 midiclose(dev_t dev, int flags, int ifmt, struct lwp *l) 1641 { 1642 return (ENXIO); 1643 } 1644 1645 int 1646 midi_writebytes(int unit, u_char *bf, int cc) 1647 { 1648 return (ENXIO); 1649 } 1650 #endif /* NMIDI == 0 */ 1651