1 /* $NetBSD: sequencer.c,v 1.63 2014/12/30 07:39:15 mrg 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 1.63 2014/12/30 07:39:15 mrg 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 { 179 callout_halt(&sc->sc_callout, &sc->lock); 180 callout_destroy(&sc->sc_callout); 181 softint_disestablish(sc->sih); 182 cv_destroy(&sc->rchan); 183 cv_destroy(&sc->wchan); 184 cv_destroy(&sc->lchan); 185 if (sc->pcq) 186 pcq_destroy(sc->pcq); 187 kmem_free(sc, sizeof(*sc)); 188 } 189 190 static struct sequencer_softc * 191 sequencercreate(int unit) 192 { 193 struct sequencer_softc *sc = kmem_zalloc(sizeof(*sc), KM_SLEEP); 194 if (sc == NULL) { 195 #ifdef DIAGNOSTIC 196 printf("%s: out of memory\n", __func__); 197 #endif 198 return NULL; 199 } 200 sc->sc_unit = unit; 201 callout_init(&sc->sc_callout, CALLOUT_MPSAFE); 202 sc->sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 203 seq_softintr, sc); 204 mutex_init(&sc->lock, MUTEX_DEFAULT, IPL_NONE); 205 cv_init(&sc->rchan, "midiseqr"); 206 cv_init(&sc->wchan, "midiseqw"); 207 cv_init(&sc->lchan, "midiseql"); 208 sc->pcq = pcq_create(SEQ_MAXQ, KM_SLEEP); 209 if (sc->pcq == NULL) { 210 sequencerdestroy(sc); 211 return NULL; 212 } 213 return sc; 214 } 215 216 217 static struct sequencer_softc * 218 sequencerget(int unit) 219 { 220 struct sequencer_softc *sc; 221 if (unit < 0) { 222 #ifdef DIAGNOSTIC 223 panic("%s: unit %d!", __func__, unit); 224 #endif 225 return NULL; 226 } 227 mutex_enter(&sequencer_lock); 228 LIST_FOREACH(sc, &sequencers, sc_link) { 229 if (sc->sc_unit == unit) { 230 mutex_exit(&sequencer_lock); 231 return sc; 232 } 233 } 234 mutex_exit(&sequencer_lock); 235 if ((sc = sequencercreate(unit)) == NULL) 236 return NULL; 237 mutex_enter(&sequencer_lock); 238 LIST_INSERT_HEAD(&sequencers, sc, sc_link); 239 mutex_exit(&sequencer_lock); 240 return sc; 241 } 242 243 #ifdef notyet 244 static void 245 sequencerput(struct sequencer_softc *sc) 246 { 247 mutex_enter(&sequencer_lock); 248 LIST_REMOVE(sc, sc_link); 249 mutex_exit(&sequencer_lock); 250 sequencerdestroy(sc); 251 } 252 #endif 253 254 void 255 sequencerattach(int n) 256 { 257 mutex_init(&sequencer_lock, MUTEX_DEFAULT, IPL_NONE); 258 } 259 260 /* 261 * Release reference to device acquired with sequencer_enter(). 262 */ 263 static void 264 sequencer_exit(struct sequencer_softc *sc) 265 { 266 267 sc->dvlock--; 268 cv_broadcast(&sc->lchan); 269 mutex_exit(&sc->lock); 270 } 271 272 /* 273 * Look up sequencer device and acquire locks for device access. 274 */ 275 static int 276 sequencer_enter(dev_t dev, struct sequencer_softc **scp) 277 { 278 struct sequencer_softc *sc; 279 280 /* First, find the device and take sc_lock. */ 281 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 282 return ENXIO; 283 mutex_enter(&sc->lock); 284 while (sc->dvlock) { 285 cv_wait(&sc->lchan, &sc->lock); 286 } 287 sc->dvlock++; 288 if (sc->dying) { 289 sequencer_exit(sc); 290 return EIO; 291 } 292 *scp = sc; 293 return 0; 294 } 295 296 static int 297 sequenceropen(dev_t dev, int flags, int ifmt, struct lwp *l) 298 { 299 struct sequencer_softc *sc; 300 struct midi_dev *md; 301 struct midi_softc *msc; 302 int error, unit, mdno; 303 304 DPRINTF(("sequenceropen\n")); 305 306 if ((error = sequencer_enter(dev, &sc)) != 0) 307 return error; 308 if (sc->isopen != 0) { 309 sequencer_exit(sc); 310 return EBUSY; 311 } 312 313 if (SEQ_IS_OLD(SEQUENCERUNIT(dev))) 314 sc->mode = SEQ_OLD; 315 else 316 sc->mode = SEQ_NEW; 317 sc->isopen++; 318 sc->flags = flags & (FREAD|FWRITE); 319 sc->pbus = 0; 320 sc->async = 0; 321 sc->input_stamp = ~0; 322 323 sc->nmidi = 0; 324 sc->ndevs = midi_unit_count(); 325 sc->timer.timebase_divperbeat = 100; 326 sc->timer.tempo_beatpermin = 60; 327 RECALC_USPERDIV(&sc->timer); 328 sc->timer.divs_lastevent = sc->timer.divs_lastchange = 0; 329 microtime(&sc->timer.reftime); 330 331 SEQ_QINIT(&sc->inq); 332 SEQ_QINIT(&sc->outq); 333 sc->lowat = SEQ_MAXQ / 2; 334 335 if (sc->ndevs > 0) { 336 mutex_exit(&sc->lock); 337 sc->devs = kmem_alloc(sc->ndevs * sizeof(struct midi_dev *), 338 KM_SLEEP); 339 for (unit = 0; unit < sc->ndevs; unit++) { 340 md = midiseq_open(unit, flags); 341 if (md) { 342 sc->devs[sc->nmidi++] = md; 343 md->seq = sc; 344 md->doingsysex = 0; 345 DPRINTF(("%s: midi unit %d opened as seq %p\n", 346 __func__, unit, md)); 347 } else { 348 DPRINTF(("%s: midi unit %d not opened as seq\n", 349 __func__, unit)); 350 } 351 } 352 mutex_enter(&sc->lock); 353 } else { 354 sc->devs = NULL; 355 } 356 357 /* Only now redirect input from MIDI devices. */ 358 for (mdno = 0; mdno < sc->nmidi; mdno++) { 359 extern struct cfdriver midi_cd; 360 361 msc = device_lookup_private(&midi_cd, sc->devs[mdno]->unit); 362 if (msc) { 363 mutex_enter(msc->lock); 364 msc->seqopen = 1; 365 mutex_exit(msc->lock); 366 } 367 } 368 369 seq_reset(sc); 370 sequencer_exit(sc); 371 372 DPRINTF(("%s: mode=%d, nmidi=%d\n", __func__, sc->mode, sc->nmidi)); 373 return 0; 374 } 375 376 static int 377 seq_drain(struct sequencer_softc *sc) 378 { 379 int error; 380 381 KASSERT(mutex_owned(&sc->lock)); 382 383 DPRINTFN(3, ("seq_drain: %p, len=%d\n", sc, SEQ_QLEN(&sc->outq))); 384 seq_startoutput(sc); 385 error = 0; 386 while (!SEQ_QEMPTY(&sc->outq) && !error) 387 error = cv_timedwait_sig(&sc->wchan, &sc->lock, 60*hz); 388 return (error); 389 } 390 391 static void 392 seq_timeout(void *addr) 393 { 394 struct sequencer_softc *sc = addr; 395 proc_t *p; 396 pid_t pid; 397 398 DPRINTFN(4, ("seq_timeout: %p\n", sc)); 399 400 mutex_enter(&sc->lock); 401 if (sc->timeout == 0) { 402 mutex_spin_exit(&sc->lock); 403 return; 404 } 405 sc->timeout = 0; 406 seq_startoutput(sc); 407 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 408 mutex_exit(&sc->lock); 409 return; 410 } 411 cv_broadcast(&sc->wchan); 412 selnotify(&sc->wsel, 0, NOTE_SUBMIT); 413 if ((pid = sc->async) != 0) { 414 mutex_enter(proc_lock); 415 if ((p = proc_find(pid)) != NULL) 416 psignal(p, SIGIO); 417 mutex_exit(proc_lock); 418 } 419 mutex_exit(&sc->lock); 420 } 421 422 static void 423 seq_startoutput(struct sequencer_softc *sc) 424 { 425 struct sequencer_queue *q = &sc->outq; 426 seq_event_t cmd; 427 428 KASSERT(mutex_owned(&sc->lock)); 429 430 if (sc->timeout) 431 return; 432 DPRINTFN(4, ("seq_startoutput: %p, len=%d\n", sc, SEQ_QLEN(q))); 433 while (!SEQ_QEMPTY(q) && !sc->timeout) { 434 SEQ_QGET(q, cmd); 435 seq_do_command(sc, &cmd); 436 } 437 } 438 439 static int 440 sequencerclose(dev_t dev, int flags, int ifmt, struct lwp *l) 441 { 442 struct sequencer_softc *sc; 443 struct midi_softc *msc; 444 int unit, error; 445 446 DPRINTF(("%s: %"PRIx64"\n", __func__, dev)); 447 448 if ((error = sequencer_enter(dev, &sc)) != 0) 449 return error; 450 seq_drain(sc); 451 if (sc->timeout) { 452 callout_halt(&sc->sc_callout, &sc->lock); 453 sc->timeout = 0; 454 } 455 /* Bin input from MIDI devices. */ 456 for (unit = 0; unit < sc->nmidi; unit++) { 457 extern struct cfdriver midi_cd; 458 459 msc = device_lookup_private(&midi_cd, unit); 460 if (msc) { 461 mutex_enter(msc->lock); 462 msc->seqopen = 0; 463 mutex_exit(msc->lock); 464 } 465 } 466 mutex_exit(&sc->lock); 467 468 for (unit = 0; unit < sc->nmidi; unit++) 469 if (sc->devs[unit] != NULL) 470 midiseq_close(sc->devs[unit]); 471 if (sc->devs != NULL) { 472 KASSERT(sc->ndevs > 0); 473 kmem_free(sc->devs, sc->ndevs * sizeof(struct midi_dev *)); 474 sc->devs = NULL; 475 } 476 477 mutex_enter(&sc->lock); 478 sc->isopen = 0; 479 sequencer_exit(sc); 480 481 DPRINTF(("%s: %"PRIx64" done\n", __func__, dev)); 482 483 return (0); 484 } 485 486 static int 487 seq_input_event(struct sequencer_softc *sc, seq_event_t *cmd) 488 { 489 struct sequencer_queue *q; 490 491 KASSERT(mutex_owned(&sc->lock)); 492 493 DPRINTFN(2, ("seq_input_event: %02x %02x %02x %02x %02x " 494 "%02x %02x %02x\n", cmd->tag, 495 cmd->unknown.byte[0], cmd->unknown.byte[1], 496 cmd->unknown.byte[2], cmd->unknown.byte[3], 497 cmd->unknown.byte[4], cmd->unknown.byte[5], 498 cmd->unknown.byte[6])); 499 q = &sc->inq; 500 if (SEQ_QFULL(q)) 501 return (ENOMEM); 502 SEQ_QPUT(q, *cmd); 503 cv_broadcast(&sc->rchan); 504 selnotify(&sc->rsel, 0, NOTE_SUBMIT); 505 if (sc->async != 0) { 506 proc_t *p; 507 508 mutex_enter(proc_lock); 509 if ((p = proc_find(sc->async)) != NULL) 510 psignal(p, SIGIO); 511 mutex_exit(proc_lock); 512 } 513 return 0; 514 } 515 516 static void 517 seq_softintr(void *addr) 518 { 519 struct sequencer_softc *sc; 520 struct timeval now; 521 seq_event_t ev; 522 int status, chan, unit; 523 sequencer_pcqitem_t qi; 524 u_long t; 525 526 sc = addr; 527 528 mutex_enter(&sc->lock); 529 530 qi.qi_ptr = pcq_get(sc->pcq); 531 if (qi.qi_ptr == NULL) { 532 mutex_exit(&sc->lock); 533 return; 534 } 535 KASSERT((qi.qi_msg[3] & 0x80) != 0); 536 unit = qi.qi_msg[3] & ~0x80; 537 status = MIDI_GET_STATUS(qi.qi_msg[0]); 538 chan = MIDI_GET_CHAN(qi.qi_msg[0]); 539 switch (status) { 540 case MIDI_NOTEON: /* midi(4) always canonicalizes hidden note-off */ 541 ev = SEQ_MK_CHN(NOTEON, .device=unit, .channel=chan, 542 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 543 break; 544 case MIDI_NOTEOFF: 545 ev = SEQ_MK_CHN(NOTEOFF, .device=unit, .channel=chan, 546 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 547 break; 548 case MIDI_KEY_PRESSURE: 549 ev = SEQ_MK_CHN(KEY_PRESSURE, .device=unit, .channel=chan, 550 .key=qi.qi_msg[1], .pressure=qi.qi_msg[2]); 551 break; 552 case MIDI_CTL_CHANGE: /* XXX not correct for MSB */ 553 ev = SEQ_MK_CHN(CTL_CHANGE, .device=unit, .channel=chan, 554 .controller=qi.qi_msg[1], .value=qi.qi_msg[2]); 555 break; 556 case MIDI_PGM_CHANGE: 557 ev = SEQ_MK_CHN(PGM_CHANGE, .device=unit, .channel=chan, 558 .program=qi.qi_msg[1]); 559 break; 560 case MIDI_CHN_PRESSURE: 561 ev = SEQ_MK_CHN(CHN_PRESSURE, .device=unit, .channel=chan, 562 .pressure=qi.qi_msg[1]); 563 break; 564 case MIDI_PITCH_BEND: 565 ev = SEQ_MK_CHN(PITCH_BEND, .device=unit, .channel=chan, 566 .value=(qi.qi_msg[1] & 0x7f) | ((qi.qi_msg[2] & 0x7f) << 7)); 567 break; 568 default: /* this is now the point where MIDI_ACKs disappear */ 569 mutex_exit(&sc->lock); 570 return; 571 } 572 microtime(&now); 573 if (!sc->timer.running) 574 now = sc->timer.stoptime; 575 SUBTIMEVAL(&now, &sc->timer.reftime); 576 t = now.tv_sec * 1000000 + now.tv_usec; 577 t /= sc->timer.usperdiv; 578 t += sc->timer.divs_lastchange; 579 if (t != sc->input_stamp) { 580 seq_input_event(sc, &SEQ_MK_TIMING(WAIT_ABS, .divisions=t)); 581 sc->input_stamp = t; /* XXX what happens if timer is reset? */ 582 } 583 seq_input_event(sc, &ev); 584 mutex_exit(&sc->lock); 585 } 586 587 static int 588 sequencerread(dev_t dev, struct uio *uio, int ioflag) 589 { 590 struct sequencer_softc *sc; 591 struct sequencer_queue *q; 592 seq_event_t ev; 593 int error; 594 595 DPRINTFN(2, ("sequencerread: %"PRIx64", count=%d, ioflag=%x\n", 596 dev, (int)uio->uio_resid, ioflag)); 597 598 if ((error = sequencer_enter(dev, &sc)) != 0) 599 return error; 600 q = &sc->inq; 601 602 if (sc->mode == SEQ_OLD) { 603 sequencer_exit(sc); 604 DPRINTFN(-1,("sequencerread: old read\n")); 605 return EINVAL; /* XXX unimplemented */ 606 } 607 while (SEQ_QEMPTY(q)) { 608 if (ioflag & IO_NDELAY) { 609 error = EWOULDBLOCK; 610 break; 611 } 612 /* Drop lock to allow concurrent read/write. */ 613 KASSERT(sc->dvlock != 0); 614 sc->dvlock--; 615 error = cv_wait_sig(&sc->rchan, &sc->lock); 616 while (sc->dvlock != 0) { 617 cv_wait(&sc->lchan, &sc->lock); 618 } 619 sc->dvlock++; 620 if (error) { 621 break; 622 } 623 } 624 while (uio->uio_resid >= sizeof(ev) && !error && !SEQ_QEMPTY(q)) { 625 SEQ_QGET(q, ev); 626 mutex_exit(&sc->lock); 627 error = uiomove(&ev, sizeof(ev), uio); 628 mutex_enter(&sc->lock); 629 } 630 sequencer_exit(sc); 631 return error; 632 } 633 634 static int 635 sequencerwrite(dev_t dev, struct uio *uio, int ioflag) 636 { 637 struct sequencer_softc *sc; 638 struct sequencer_queue *q; 639 int error; 640 seq_event_t cmdbuf; 641 int size; 642 643 DPRINTFN(2, ("sequencerwrite: %"PRIx64", count=%d\n", dev, 644 (int)uio->uio_resid)); 645 646 if ((error = sequencer_enter(dev, &sc)) != 0) 647 return error; 648 q = &sc->outq; 649 650 size = sc->mode == SEQ_NEW ? sizeof cmdbuf : SEQOLD_CMDSIZE; 651 while (uio->uio_resid >= size && error == 0) { 652 mutex_exit(&sc->lock); 653 error = uiomove(&cmdbuf, size, uio); 654 if (error == 0) { 655 if (sc->mode == SEQ_OLD && seq_to_new(&cmdbuf, uio)) { 656 mutex_enter(&sc->lock); 657 continue; 658 } 659 if (cmdbuf.tag == SEQ_FULLSIZE) { 660 /* We do it like OSS does, asynchronously */ 661 error = seq_do_fullsize(sc, &cmdbuf, uio); 662 if (error == 0) { 663 mutex_enter(&sc->lock); 664 continue; 665 } 666 } 667 } 668 mutex_enter(&sc->lock); 669 if (error != 0) { 670 break; 671 } 672 while (SEQ_QFULL(q)) { 673 seq_startoutput(sc); 674 if (SEQ_QFULL(q)) { 675 if (ioflag & IO_NDELAY) { 676 error = EWOULDBLOCK; 677 break; 678 } 679 error = cv_wait_sig(&sc->wchan, &sc->lock); 680 if (error) { 681 break; 682 } 683 } 684 } 685 if (error == 0) { 686 SEQ_QPUT(q, cmdbuf); 687 } 688 } 689 if (error == 0) { 690 seq_startoutput(sc); 691 } else { 692 DPRINTFN(2, ("sequencerwrite: error=%d\n", error)); 693 } 694 sequencer_exit(sc); 695 return error; 696 } 697 698 static int 699 sequencerioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 700 { 701 struct sequencer_softc *sc; 702 struct synth_info *si; 703 struct midi_dev *md; 704 int devno, error, t; 705 struct timeval now; 706 u_long tx; 707 708 DPRINTFN(2, ("sequencerioctl: %"PRIx64" cmd=0x%08lx\n", dev, cmd)); 709 710 if ((error = sequencer_enter(dev, &sc)) != 0) 711 return error; 712 switch (cmd) { 713 case FIONBIO: 714 /* All handled in the upper FS layer. */ 715 break; 716 717 case FIOASYNC: 718 if (*(int *)addr) { 719 if (sc->async != 0) 720 return EBUSY; 721 sc->async = curproc->p_pid; 722 DPRINTF(("%s: FIOASYNC %d\n", __func__, 723 sc->async)); 724 } else { 725 sc->async = 0; 726 } 727 break; 728 729 case SEQUENCER_RESET: 730 seq_reset(sc); 731 break; 732 733 case SEQUENCER_PANIC: 734 seq_reset(sc); 735 /* Do more? OSS doesn't */ 736 break; 737 738 case SEQUENCER_SYNC: 739 if (sc->flags != FREAD) 740 seq_drain(sc); 741 break; 742 743 case SEQUENCER_INFO: 744 si = (struct synth_info*)addr; 745 devno = si->device; 746 if (devno < 0 || devno >= sc->nmidi) { 747 error = EINVAL; 748 break; 749 } 750 md = sc->devs[devno]; 751 strncpy(si->name, md->name, sizeof si->name); 752 si->synth_type = SYNTH_TYPE_MIDI; 753 si->synth_subtype = md->subtype; 754 si->nr_voices = md->nr_voices; 755 si->instr_bank_size = md->instr_bank_size; 756 si->capabilities = md->capabilities; 757 break; 758 759 case SEQUENCER_NRSYNTHS: 760 *(int *)addr = sc->nmidi; 761 break; 762 763 case SEQUENCER_NRMIDIS: 764 *(int *)addr = sc->nmidi; 765 break; 766 767 case SEQUENCER_OUTOFBAND: 768 DPRINTFN(3, ("sequencer_ioctl: OOB=%02x %02x %02x %02x %02x %02x %02x %02x\n", 769 *(u_char *)addr, *((u_char *)addr+1), 770 *((u_char *)addr+2), *((u_char *)addr+3), 771 *((u_char *)addr+4), *((u_char *)addr+5), 772 *((u_char *)addr+6), *((u_char *)addr+7))); 773 if ((sc->flags & FWRITE) == 0) { 774 error = EBADF; 775 } else { 776 error = seq_do_command(sc, (seq_event_t *)addr); 777 } 778 break; 779 780 case SEQUENCER_TMR_TIMEBASE: 781 t = *(int *)addr; 782 if (t < 1) 783 t = 1; 784 if (t > 10000) 785 t = 10000; 786 *(int *)addr = t; 787 sc->timer.timebase_divperbeat = t; 788 sc->timer.divs_lastchange = sc->timer.divs_lastevent; 789 microtime(&sc->timer.reftime); 790 RECALC_USPERDIV(&sc->timer); 791 break; 792 793 case SEQUENCER_TMR_START: 794 error = seq_do_timing(sc, &SEQ_MK_TIMING(START)); 795 break; 796 797 case SEQUENCER_TMR_STOP: 798 error = seq_do_timing(sc, &SEQ_MK_TIMING(STOP)); 799 break; 800 801 case SEQUENCER_TMR_CONTINUE: 802 error = seq_do_timing(sc, &SEQ_MK_TIMING(CONTINUE)); 803 break; 804 805 case SEQUENCER_TMR_TEMPO: 806 error = seq_do_timing(sc, 807 &SEQ_MK_TIMING(TEMPO, .bpm=*(int *)addr)); 808 RECALC_USPERDIV(&sc->timer); 809 if (error == 0) 810 *(int *)addr = sc->timer.tempo_beatpermin; 811 break; 812 813 case SEQUENCER_TMR_SOURCE: 814 *(int *)addr = SEQUENCER_TMR_INTERNAL; 815 break; 816 817 case SEQUENCER_TMR_METRONOME: 818 /* noop */ 819 break; 820 821 case SEQUENCER_THRESHOLD: 822 t = SEQ_MAXQ - *(int *)addr / sizeof (seq_event_rec); 823 if (t < 1) 824 t = 1; 825 if (t > SEQ_MAXQ) 826 t = SEQ_MAXQ; 827 sc->lowat = t; 828 break; 829 830 case SEQUENCER_CTRLRATE: 831 *(int *)addr = (sc->timer.tempo_beatpermin 832 *sc->timer.timebase_divperbeat + 30) / 60; 833 break; 834 835 case SEQUENCER_GETTIME: 836 microtime(&now); 837 SUBTIMEVAL(&now, &sc->timer.reftime); 838 tx = now.tv_sec * 1000000 + now.tv_usec; 839 tx /= sc->timer.usperdiv; 840 tx += sc->timer.divs_lastchange; 841 *(int *)addr = tx; 842 break; 843 844 default: 845 DPRINTFN(-1,("sequencer_ioctl: unimpl %08lx\n", cmd)); 846 error = EINVAL; 847 break; 848 } 849 sequencer_exit(sc); 850 851 return error; 852 } 853 854 static int 855 sequencerpoll(dev_t dev, int events, struct lwp *l) 856 { 857 struct sequencer_softc *sc; 858 int revents = 0; 859 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 860 return ENXIO; 861 862 DPRINTF(("%s: %p events=0x%x\n", __func__, sc, events)); 863 864 mutex_enter(&sc->lock); 865 if (events & (POLLIN | POLLRDNORM)) 866 if ((sc->flags&FREAD) && !SEQ_QEMPTY(&sc->inq)) 867 revents |= events & (POLLIN | POLLRDNORM); 868 869 if (events & (POLLOUT | POLLWRNORM)) 870 if ((sc->flags&FWRITE) && SEQ_QLEN(&sc->outq) < sc->lowat) 871 revents |= events & (POLLOUT | POLLWRNORM); 872 873 if (revents == 0) { 874 if ((sc->flags&FREAD) && (events & (POLLIN | POLLRDNORM))) 875 selrecord(l, &sc->rsel); 876 877 if ((sc->flags&FWRITE) && (events & (POLLOUT | POLLWRNORM))) 878 selrecord(l, &sc->wsel); 879 } 880 mutex_exit(&sc->lock); 881 882 return revents; 883 } 884 885 static void 886 filt_sequencerrdetach(struct knote *kn) 887 { 888 struct sequencer_softc *sc = kn->kn_hook; 889 890 mutex_enter(&sc->lock); 891 SLIST_REMOVE(&sc->rsel.sel_klist, kn, knote, kn_selnext); 892 mutex_exit(&sc->lock); 893 } 894 895 static int 896 filt_sequencerread(struct knote *kn, long hint) 897 { 898 struct sequencer_softc *sc = kn->kn_hook; 899 int rv; 900 901 if (hint != NOTE_SUBMIT) { 902 mutex_enter(&sc->lock); 903 } 904 if (SEQ_QEMPTY(&sc->inq)) { 905 rv = 0; 906 } else { 907 kn->kn_data = sizeof(seq_event_rec); 908 rv = 1; 909 } 910 if (hint != NOTE_SUBMIT) { 911 mutex_exit(&sc->lock); 912 } 913 return rv; 914 } 915 916 static const struct filterops sequencerread_filtops = 917 { 1, NULL, filt_sequencerrdetach, filt_sequencerread }; 918 919 static void 920 filt_sequencerwdetach(struct knote *kn) 921 { 922 struct sequencer_softc *sc = kn->kn_hook; 923 924 mutex_enter(&sc->lock); 925 SLIST_REMOVE(&sc->wsel.sel_klist, kn, knote, kn_selnext); 926 mutex_exit(&sc->lock); 927 } 928 929 static int 930 filt_sequencerwrite(struct knote *kn, long hint) 931 { 932 struct sequencer_softc *sc = kn->kn_hook; 933 int rv; 934 935 if (hint != NOTE_SUBMIT) { 936 mutex_enter(&sc->lock); 937 } 938 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 939 rv = 0; 940 } else { 941 kn->kn_data = sizeof(seq_event_rec); 942 rv = 1; 943 } 944 if (hint != NOTE_SUBMIT) { 945 mutex_exit(&sc->lock); 946 } 947 return rv; 948 } 949 950 static const struct filterops sequencerwrite_filtops = 951 { 1, NULL, filt_sequencerwdetach, filt_sequencerwrite }; 952 953 static int 954 sequencerkqfilter(dev_t dev, struct knote *kn) 955 { 956 struct sequencer_softc *sc; 957 struct klist *klist; 958 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 959 return ENXIO; 960 961 switch (kn->kn_filter) { 962 case EVFILT_READ: 963 klist = &sc->rsel.sel_klist; 964 kn->kn_fop = &sequencerread_filtops; 965 break; 966 967 case EVFILT_WRITE: 968 klist = &sc->wsel.sel_klist; 969 kn->kn_fop = &sequencerwrite_filtops; 970 break; 971 972 default: 973 return (EINVAL); 974 } 975 976 kn->kn_hook = sc; 977 978 mutex_enter(&sc->lock); 979 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 980 mutex_exit(&sc->lock); 981 982 return (0); 983 } 984 985 static void 986 seq_reset(struct sequencer_softc *sc) 987 { 988 int i, chn; 989 struct midi_dev *md; 990 991 KASSERT(mutex_owned(&sc->lock)); 992 993 if (!(sc->flags & FWRITE)) 994 return; 995 for (i = 0; i < sc->nmidi; i++) { 996 md = sc->devs[i]; 997 midiseq_reset(md); 998 for (chn = 0; chn < MAXCHAN; chn++) { 999 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 1000 .controller=MIDI_CTRL_NOTES_OFF)); 1001 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 1002 .controller=MIDI_CTRL_RESET)); 1003 midiseq_pitchbend(md, chn, &SEQ_MK_CHN(PITCH_BEND, 1004 .value=MIDI_BEND_NEUTRAL)); 1005 } 1006 } 1007 } 1008 1009 static int 1010 seq_do_command(struct sequencer_softc *sc, seq_event_t *b) 1011 { 1012 int dev; 1013 1014 KASSERT(mutex_owned(&sc->lock)); 1015 1016 DPRINTFN(4, ("seq_do_command: %p cmd=0x%02x\n", sc, b->timing.op)); 1017 1018 switch(b->tag) { 1019 case SEQ_LOCAL: 1020 return seq_do_local(sc, b); 1021 case SEQ_TIMING: 1022 return seq_do_timing(sc, b); 1023 case SEQ_CHN_VOICE: 1024 return seq_do_chnvoice(sc, b); 1025 case SEQ_CHN_COMMON: 1026 return seq_do_chncommon(sc, b); 1027 case SEQ_SYSEX: 1028 return seq_do_sysex(sc, b); 1029 /* COMPAT */ 1030 case SEQOLD_MIDIPUTC: 1031 dev = b->putc.device; 1032 if (dev < 0 || dev >= sc->nmidi) 1033 return (ENXIO); 1034 return midiseq_out(sc->devs[dev], &b->putc.byte, 1, 0); 1035 default: 1036 DPRINTFN(-1,("seq_do_command: unimpl command %02x\n", b->tag)); 1037 return (EINVAL); 1038 } 1039 } 1040 1041 static int 1042 seq_do_chnvoice(struct sequencer_softc *sc, seq_event_t *b) 1043 { 1044 int dev; 1045 int error; 1046 struct midi_dev *md; 1047 1048 KASSERT(mutex_owned(&sc->lock)); 1049 1050 dev = b->voice.device; 1051 if (dev < 0 || dev >= sc->nmidi || 1052 b->voice.channel > 15 || 1053 b->voice.key >= SEQ_NOTE_MAX) 1054 return ENXIO; 1055 md = sc->devs[dev]; 1056 switch(b->voice.op) { 1057 case MIDI_NOTEON: /* no need to special-case hidden noteoff here */ 1058 error = midiseq_noteon(md, b->voice.channel, b->voice.key, b); 1059 break; 1060 case MIDI_NOTEOFF: 1061 error = midiseq_noteoff(md, b->voice.channel, b->voice.key, b); 1062 break; 1063 case MIDI_KEY_PRESSURE: 1064 error = midiseq_keypressure(md, 1065 b->voice.channel, b->voice.key, b); 1066 break; 1067 default: 1068 DPRINTFN(-1,("seq_do_chnvoice: unimpl command %02x\n", 1069 b->voice.op)); 1070 error = EINVAL; 1071 break; 1072 } 1073 return error; 1074 } 1075 1076 static int 1077 seq_do_chncommon(struct sequencer_softc *sc, seq_event_t *b) 1078 { 1079 int dev; 1080 int error; 1081 struct midi_dev *md; 1082 1083 KASSERT(mutex_owned(&sc->lock)); 1084 1085 dev = b->common.device; 1086 if (dev < 0 || dev >= sc->nmidi || 1087 b->common.channel > 15) 1088 return ENXIO; 1089 md = sc->devs[dev]; 1090 DPRINTFN(2,("seq_do_chncommon: %02x\n", b->common.op)); 1091 1092 error = 0; 1093 switch(b->common.op) { 1094 case MIDI_PGM_CHANGE: 1095 error = midiseq_pgmchange(md, b->common.channel, b); 1096 break; 1097 case MIDI_CTL_CHANGE: 1098 error = midiseq_ctlchange(md, b->common.channel, b); 1099 break; 1100 case MIDI_PITCH_BEND: 1101 error = midiseq_pitchbend(md, b->common.channel, b); 1102 break; 1103 case MIDI_CHN_PRESSURE: 1104 error = midiseq_chnpressure(md, b->common.channel, b); 1105 break; 1106 default: 1107 DPRINTFN(-1,("seq_do_chncommon: unimpl command %02x\n", 1108 b->common.op)); 1109 error = EINVAL; 1110 break; 1111 } 1112 return error; 1113 } 1114 1115 static int 1116 seq_do_local(struct sequencer_softc *sc, seq_event_t *b) 1117 { 1118 1119 KASSERT(mutex_owned(&sc->lock)); 1120 1121 return (EINVAL); 1122 } 1123 1124 static int 1125 seq_do_sysex(struct sequencer_softc *sc, seq_event_t *b) 1126 { 1127 int dev, i; 1128 struct midi_dev *md; 1129 uint8_t *bf = b->sysex.buffer; 1130 1131 KASSERT(mutex_owned(&sc->lock)); 1132 1133 dev = b->sysex.device; 1134 if (dev < 0 || dev >= sc->nmidi) 1135 return (ENXIO); 1136 DPRINTF(("%s: dev=%d\n", __func__, dev)); 1137 md = sc->devs[dev]; 1138 1139 if (!md->doingsysex) { 1140 midiseq_out(md, (uint8_t[]){MIDI_SYSEX_START}, 1, 0); 1141 md->doingsysex = 1; 1142 } 1143 1144 for (i = 0; i < 6 && bf[i] != 0xff; i++) 1145 ; 1146 midiseq_out(md, bf, i, 0); 1147 if (i < 6 || (i > 0 && bf[i-1] == MIDI_SYSEX_END)) 1148 md->doingsysex = 0; 1149 return 0; 1150 } 1151 1152 static void 1153 seq_timer_waitabs(struct sequencer_softc *sc, uint32_t divs) 1154 { 1155 struct timeval when; 1156 long long usec; 1157 struct syn_timer *t; 1158 int ticks; 1159 1160 KASSERT(mutex_owned(&sc->lock)); 1161 1162 t = &sc->timer; 1163 t->divs_lastevent = divs; 1164 divs -= t->divs_lastchange; 1165 usec = (long long)divs * (long long)t->usperdiv; /* convert to usec */ 1166 when.tv_sec = usec / 1000000; 1167 when.tv_usec = usec % 1000000; 1168 DPRINTFN(4, ("seq_timer_waitabs: adjdivs=%d, sleep when=%"PRId64".%06"PRId64, 1169 divs, when.tv_sec, (uint64_t)when.tv_usec)); 1170 ADDTIMEVAL(&when, &t->reftime); /* abstime for end */ 1171 ticks = tvhzto(&when); 1172 DPRINTFN(4, (" when+start=%"PRId64".%06"PRId64", tick=%d\n", 1173 when.tv_sec, (uint64_t)when.tv_usec, ticks)); 1174 if (ticks > 0) { 1175 #ifdef DIAGNOSTIC 1176 if (ticks > 20 * hz) { 1177 /* Waiting more than 20s */ 1178 printf("seq_timer_waitabs: funny ticks=%d, " 1179 "usec=%lld\n", ticks, usec); 1180 } 1181 #endif 1182 sc->timeout = 1; 1183 callout_reset(&sc->sc_callout, ticks, 1184 seq_timeout, sc); 1185 } 1186 #ifdef SEQUENCER_DEBUG 1187 else if (tick < 0) 1188 DPRINTF(("%s: ticks = %d\n", __func__, ticks)); 1189 #endif 1190 } 1191 1192 static int 1193 seq_do_timing(struct sequencer_softc *sc, seq_event_t *b) 1194 { 1195 struct syn_timer *t = &sc->timer; 1196 struct timeval when; 1197 int error; 1198 1199 KASSERT(mutex_owned(&sc->lock)); 1200 1201 error = 0; 1202 switch(b->timing.op) { 1203 case TMR_WAIT_REL: 1204 seq_timer_waitabs(sc, 1205 b->t_WAIT_REL.divisions + t->divs_lastevent); 1206 break; 1207 case TMR_WAIT_ABS: 1208 seq_timer_waitabs(sc, b->t_WAIT_ABS.divisions); 1209 break; 1210 case TMR_START: 1211 microtime(&t->reftime); 1212 t->divs_lastevent = t->divs_lastchange = 0; 1213 t->running = 1; 1214 break; 1215 case TMR_STOP: 1216 microtime(&t->stoptime); 1217 t->running = 0; 1218 break; 1219 case TMR_CONTINUE: 1220 if (t->running) 1221 break; 1222 microtime(&when); 1223 SUBTIMEVAL(&when, &t->stoptime); 1224 ADDTIMEVAL(&t->reftime, &when); 1225 t->running = 1; 1226 break; 1227 case TMR_TEMPO: 1228 /* bpm is unambiguously MIDI clocks per minute / 24 */ 1229 /* (24 MIDI clocks are usually but not always a quarter note) */ 1230 if (b->t_TEMPO.bpm < 8) /* where are these limits specified? */ 1231 t->tempo_beatpermin = 8; 1232 else if (b->t_TEMPO.bpm > 360) /* ? */ 1233 t->tempo_beatpermin = 360; 1234 else 1235 t->tempo_beatpermin = b->t_TEMPO.bpm; 1236 t->divs_lastchange = t->divs_lastevent; 1237 microtime(&t->reftime); 1238 RECALC_USPERDIV(t); 1239 break; 1240 case TMR_ECHO: 1241 error = seq_input_event(sc, b); 1242 break; 1243 case TMR_RESET: 1244 t->divs_lastevent = t->divs_lastchange = 0; 1245 microtime(&t->reftime); 1246 break; 1247 case TMR_SPP: 1248 case TMR_TIMESIG: 1249 DPRINTF(("%s: unimplemented %02x\n", __func__, b->timing.op)); 1250 error = EINVAL; /* not quite accurate... */ 1251 break; 1252 default: 1253 DPRINTF(("%s: unknown %02x\n", __func__, b->timing.op)); 1254 error = EINVAL; 1255 break; 1256 } 1257 return (error); 1258 } 1259 1260 static int 1261 seq_do_fullsize(struct sequencer_softc *sc, seq_event_t *b, struct uio *uio) 1262 { 1263 struct sysex_info sysex; 1264 u_int dev; 1265 1266 #ifdef DIAGNOSTIC 1267 if (sizeof(seq_event_rec) != SEQ_SYSEX_HDRSIZE) { 1268 printf("seq_do_fullsize: sysex size ??\n"); 1269 return EINVAL; 1270 } 1271 #endif 1272 memcpy(&sysex, b, sizeof sysex); 1273 dev = sysex.device_no; 1274 if (/* dev < 0 || */ dev >= sc->nmidi) 1275 return (ENXIO); 1276 DPRINTFN(2, ("seq_do_fullsize: fmt=%04x, dev=%d, len=%d\n", 1277 sysex.key, dev, sysex.len)); 1278 return (midiseq_loadpatch(sc->devs[dev], &sysex, uio)); 1279 } 1280 1281 /* 1282 * Convert an old sequencer event to a new one. 1283 * NOTE: on entry, *ev may contain valid data only in the first 4 bytes. 1284 * That may be true even on exit (!) in the case of SEQOLD_MIDIPUTC; the 1285 * caller will only look at the first bytes in that case anyway. Ugly? Sure. 1286 */ 1287 static int 1288 seq_to_new(seq_event_t *ev, struct uio *uio) 1289 { 1290 int cmd, chan, note, parm; 1291 uint32_t tmp_delay; 1292 int error; 1293 uint8_t *bfp; 1294 1295 cmd = ev->tag; 1296 bfp = ev->unknown.byte; 1297 chan = *bfp++; 1298 note = *bfp++; 1299 parm = *bfp++; 1300 DPRINTFN(3, ("seq_to_new: 0x%02x %d %d %d\n", cmd, chan, note, parm)); 1301 1302 if (cmd >= 0x80) { 1303 /* Fill the event record */ 1304 if (uio->uio_resid >= sizeof *ev - SEQOLD_CMDSIZE) { 1305 error = uiomove(bfp, sizeof *ev - SEQOLD_CMDSIZE, uio); 1306 if (error) 1307 return error; 1308 } else 1309 return EINVAL; 1310 } 1311 1312 switch(cmd) { 1313 case SEQOLD_NOTEOFF: 1314 /* 1315 * What's with the SEQ_NOTE_XXX? In OSS this seems to have 1316 * been undocumented magic for messing with the overall volume 1317 * of a 'voice', equated precariously with 'channel' and 1318 * pretty much unimplementable except by directly frobbing a 1319 * synth chip. For us, who treat everything as interfaced over 1320 * MIDI, this will just be unceremoniously discarded as 1321 * invalid in midiseq_noteoff, making the whole event an 1322 * elaborate no-op, and that doesn't seem to be any different 1323 * from what happens on linux with a MIDI-interfaced device, 1324 * by the way. The moral is ... use the new /dev/music API, ok? 1325 */ 1326 *ev = SEQ_MK_CHN(NOTEOFF, .device=0, .channel=chan, 1327 .key=SEQ_NOTE_XXX, .velocity=parm); 1328 break; 1329 case SEQOLD_NOTEON: 1330 *ev = SEQ_MK_CHN(NOTEON, 1331 .device=0, .channel=chan, .key=note, .velocity=parm); 1332 break; 1333 case SEQOLD_WAIT: 1334 /* 1335 * This event cannot even /exist/ on non-littleendian machines, 1336 * and so help me, that's exactly the way OSS defined it. 1337 * Also, the OSS programmer's guide states (p. 74, v1.11) 1338 * that seqold time units are system clock ticks, unlike 1339 * the new 'divisions' which are determined by timebase. In 1340 * that case we would need to do scaling here - but no such 1341 * behavior is visible in linux either--which also treats this 1342 * value, surprisingly, as an absolute, not relative, time. 1343 * My guess is that this event has gone unused so long that 1344 * nobody could agree we got it wrong no matter what we do. 1345 */ 1346 tmp_delay = *(uint32_t *)ev >> 8; 1347 *ev = SEQ_MK_TIMING(WAIT_ABS, .divisions=tmp_delay); 1348 break; 1349 case SEQOLD_SYNCTIMER: 1350 /* 1351 * The TMR_RESET event is not defined in any OSS materials 1352 * I can find; it may have been invented here just to provide 1353 * an accurate _to_new translation of this event. 1354 */ 1355 *ev = SEQ_MK_TIMING(RESET); 1356 break; 1357 case SEQOLD_PGMCHANGE: 1358 *ev = SEQ_MK_CHN(PGM_CHANGE, 1359 .device=0, .channel=chan, .program=note); 1360 break; 1361 case SEQOLD_MIDIPUTC: 1362 break; /* interpret in normal mode */ 1363 case SEQOLD_ECHO: 1364 case SEQOLD_PRIVATE: 1365 case SEQOLD_EXTENDED: 1366 default: 1367 DPRINTF(("%s: not impl 0x%02x\n", __func__, cmd)); 1368 return EINVAL; 1369 /* In case new-style events show up */ 1370 case SEQ_TIMING: 1371 case SEQ_CHN_VOICE: 1372 case SEQ_CHN_COMMON: 1373 case SEQ_FULLSIZE: 1374 break; 1375 } 1376 return 0; 1377 } 1378 1379 /**********************************************/ 1380 1381 void 1382 midiseq_in(struct midi_dev *md, u_char *msg, int len) 1383 { 1384 struct sequencer_softc *sc; 1385 sequencer_pcqitem_t qi; 1386 1387 DPRINTFN(2, ("midiseq_in: %p %02x %02x %02x\n", 1388 md, msg[0], msg[1], msg[2])); 1389 1390 sc = md->seq; 1391 1392 qi.qi_msg[0] = msg[0]; 1393 qi.qi_msg[1] = msg[1]; 1394 qi.qi_msg[2] = msg[2]; 1395 qi.qi_msg[3] = md->unit | 0x80; /* ensure non-zero value of qi_ptr */ 1396 pcq_put(sc->pcq, qi.qi_ptr); 1397 softint_schedule(sc->sih); 1398 } 1399 1400 static struct midi_dev * 1401 midiseq_open(int unit, int flags) 1402 { 1403 extern struct cfdriver midi_cd; 1404 int error; 1405 struct midi_dev *md; 1406 struct midi_softc *sc; 1407 struct midi_info mi; 1408 int major; 1409 dev_t dev; 1410 vnode_t *vp; 1411 int oflags; 1412 1413 major = devsw_name2chr("midi", NULL, 0); 1414 dev = makedev(major, unit); 1415 1416 DPRINTFN(2, ("midiseq_open: %d %d\n", unit, flags)); 1417 1418 error = cdevvp(dev, &vp); 1419 if (error) 1420 return NULL; 1421 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1422 error = VOP_OPEN(vp, flags, kauth_cred_get()); 1423 VOP_UNLOCK(vp); 1424 if (error) { 1425 vrele(vp); 1426 return NULL; 1427 } 1428 1429 /* Only after we have acquired reference via VOP_OPEN(). */ 1430 midi_getinfo(dev, &mi); 1431 oflags = flags; 1432 if ((mi.props & MIDI_PROP_CAN_INPUT) == 0) 1433 flags &= ~FREAD; 1434 if ((flags & (FREAD|FWRITE)) == 0) { 1435 VOP_CLOSE(vp, oflags, kauth_cred_get()); 1436 vrele(vp); 1437 return NULL; 1438 } 1439 1440 sc = device_lookup_private(&midi_cd, unit); 1441 md = kmem_zalloc(sizeof(*md), KM_SLEEP); 1442 md->unit = unit; 1443 md->name = mi.name; 1444 md->subtype = 0; 1445 md->nr_voices = 128; /* XXX */ 1446 md->instr_bank_size = 128; /* XXX */ 1447 md->vp = vp; 1448 if (mi.props & MIDI_PROP_CAN_INPUT) 1449 md->capabilities |= SYNTH_CAP_INPUT; 1450 sc->seq_md = md; 1451 return (md); 1452 } 1453 1454 static void 1455 midiseq_close(struct midi_dev *md) 1456 { 1457 DPRINTFN(2, ("midiseq_close: %d\n", md->unit)); 1458 (void)vn_close(md->vp, 0, kauth_cred_get()); 1459 kmem_free(md, sizeof(*md)); 1460 } 1461 1462 static void 1463 midiseq_reset(struct midi_dev *md) 1464 { 1465 /* XXX send GM reset? */ 1466 DPRINTFN(3, ("midiseq_reset: %d\n", md->unit)); 1467 } 1468 1469 static int 1470 midiseq_out(struct midi_dev *md, u_char *bf, u_int cc, int chk) 1471 { 1472 DPRINTFN(5, ("midiseq_out: md=%p, unit=%d, bf[0]=0x%02x, cc=%d\n", 1473 md, md->unit, bf[0], cc)); 1474 1475 /* midi(4) does running status compression where appropriate. */ 1476 return midi_writebytes(md->unit, bf, cc); 1477 } 1478 1479 /* 1480 * If the writing process hands us a hidden note-off in a note-on event, 1481 * we will simply write it that way; no need to special case it here, 1482 * as midi(4) will always canonicalize or compress as appropriate anyway. 1483 */ 1484 static int 1485 midiseq_noteon(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1486 { 1487 return midiseq_out(md, (uint8_t[]){ 1488 MIDI_NOTEON | chan, key, ev->c_NOTEON.velocity & 0x7f}, 3, 1); 1489 } 1490 1491 static int 1492 midiseq_noteoff(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1493 { 1494 return midiseq_out(md, (uint8_t[]){ 1495 MIDI_NOTEOFF | chan, key, ev->c_NOTEOFF.velocity & 0x7f}, 3, 1); 1496 } 1497 1498 static int 1499 midiseq_keypressure(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1500 { 1501 return midiseq_out(md, (uint8_t[]){ 1502 MIDI_KEY_PRESSURE | chan, key, 1503 ev->c_KEY_PRESSURE.pressure & 0x7f}, 3, 1); 1504 } 1505 1506 static int 1507 midiseq_pgmchange(struct midi_dev *md, int chan, seq_event_t *ev) 1508 { 1509 if (ev->c_PGM_CHANGE.program > 127) 1510 return EINVAL; 1511 return midiseq_out(md, (uint8_t[]){ 1512 MIDI_PGM_CHANGE | chan, ev->c_PGM_CHANGE.program}, 2, 1); 1513 } 1514 1515 static int 1516 midiseq_chnpressure(struct midi_dev *md, int chan, seq_event_t *ev) 1517 { 1518 if (ev->c_CHN_PRESSURE.pressure > 127) 1519 return EINVAL; 1520 return midiseq_out(md, (uint8_t[]){ 1521 MIDI_CHN_PRESSURE | chan, ev->c_CHN_PRESSURE.pressure}, 2, 1); 1522 } 1523 1524 static int 1525 midiseq_ctlchange(struct midi_dev *md, int chan, seq_event_t *ev) 1526 { 1527 if (ev->c_CTL_CHANGE.controller > 127) 1528 return EINVAL; 1529 return midiseq_out( md, (uint8_t[]){ 1530 MIDI_CTL_CHANGE | chan, ev->c_CTL_CHANGE.controller, 1531 ev->c_CTL_CHANGE.value & 0x7f /* XXX this is SO wrong */ 1532 }, 3, 1); 1533 } 1534 1535 static int 1536 midiseq_pitchbend(struct midi_dev *md, int chan, seq_event_t *ev) 1537 { 1538 return midiseq_out(md, (uint8_t[]){ 1539 MIDI_PITCH_BEND | chan, 1540 ev->c_PITCH_BEND.value & 0x7f, 1541 (ev->c_PITCH_BEND.value >> 7) & 0x7f}, 3, 1); 1542 } 1543 1544 static int 1545 midiseq_loadpatch(struct midi_dev *md, 1546 struct sysex_info *sysex, struct uio *uio) 1547 { 1548 struct sequencer_softc *sc; 1549 u_char c, bf[128]; 1550 int i, cc, error; 1551 1552 if (sysex->key != SEQ_SYSEX_PATCH) { 1553 DPRINTFN(-1,("midiseq_loadpatch: bad patch key 0x%04x\n", 1554 sysex->key)); 1555 return (EINVAL); 1556 } 1557 if (uio->uio_resid < sysex->len) 1558 /* adjust length, should be an error */ 1559 sysex->len = uio->uio_resid; 1560 1561 DPRINTFN(2, ("midiseq_loadpatch: len=%d\n", sysex->len)); 1562 if (sysex->len == 0) 1563 return EINVAL; 1564 error = uiomove(&c, 1, uio); 1565 if (error) 1566 return error; 1567 if (c != MIDI_SYSEX_START) /* must start like this */ 1568 return EINVAL; 1569 sc = md->seq; 1570 mutex_enter(&sc->lock); 1571 error = midiseq_out(md, &c, 1, 0); 1572 mutex_exit(&sc->lock); 1573 if (error) 1574 return error; 1575 --sysex->len; 1576 while (sysex->len > 0) { 1577 cc = sysex->len; 1578 if (cc > sizeof bf) 1579 cc = sizeof bf; 1580 error = uiomove(bf, cc, uio); 1581 if (error) 1582 break; 1583 for(i = 0; i < cc && !MIDI_IS_STATUS(bf[i]); i++) 1584 ; 1585 /* 1586 * XXX midi(4)'s buffer might not accommodate this, and the 1587 * function will not block us (though in this case we have 1588 * a process and could in principle block). 1589 */ 1590 mutex_enter(&sc->lock); 1591 error = midiseq_out(md, bf, i, 0); 1592 mutex_exit(&sc->lock); 1593 if (error) 1594 break; 1595 sysex->len -= i; 1596 if (i != cc) 1597 break; 1598 } 1599 /* 1600 * Any leftover data in uio is rubbish; 1601 * the SYSEX should be one write ending in SYSEX_END. 1602 */ 1603 uio->uio_resid = 0; 1604 c = MIDI_SYSEX_END; 1605 mutex_enter(&sc->lock); 1606 error = midiseq_out(md, &c, 1, 0); 1607 mutex_exit(&sc->lock); 1608 return error; 1609 } 1610 1611 #include "midi.h" 1612 #if NMIDI == 0 1613 static dev_type_open(midiopen); 1614 static dev_type_close(midiclose); 1615 1616 const struct cdevsw midi_cdevsw = { 1617 .d_open = midiopen, 1618 .d_close = midiclose, 1619 .d_read = noread, 1620 .d_write = nowrite, 1621 .d_ioctl = noioctl, 1622 .d_stop = nostop, 1623 .d_tty = notty, 1624 .d_poll = nopoll, 1625 .d_mmap = nommap, 1626 .d_kqfilter = nokqfilter, 1627 .d_discard = nodiscard, 1628 .d_flag = D_OTHER | D_MPSAFE 1629 }; 1630 1631 /* 1632 * If someone has a sequencer, but no midi devices there will 1633 * be unresolved references, so we provide little stubs. 1634 */ 1635 1636 int 1637 midi_unit_count(void) 1638 { 1639 return (0); 1640 } 1641 1642 static int 1643 midiopen(dev_t dev, int flags, int ifmt, struct lwp *l) 1644 { 1645 return (ENXIO); 1646 } 1647 1648 struct cfdriver midi_cd; 1649 1650 void 1651 midi_getinfo(dev_t dev, struct midi_info *mi) 1652 { 1653 mi->name = "Dummy MIDI device"; 1654 mi->props = 0; 1655 } 1656 1657 static int 1658 midiclose(dev_t dev, int flags, int ifmt, struct lwp *l) 1659 { 1660 return (ENXIO); 1661 } 1662 1663 int 1664 midi_writebytes(int unit, u_char *bf, int cc) 1665 { 1666 return (ENXIO); 1667 } 1668 #endif /* NMIDI == 0 */ 1669