1 /* $NetBSD: sequencer.c,v 1.57 2013/10/17 21:19:40 christos 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 1.57 2013/10/17 21:19:40 christos 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 sequenceropen, sequencerclose, sequencerread, sequencerwrite, 161 sequencerioctl, nostop, notty, sequencerpoll, nommap, 162 sequencerkqfilter, D_OTHER | D_MPSAFE 163 }; 164 static LIST_HEAD(, sequencer_softc) sequencers = LIST_HEAD_INITIALIZER(sequencers); 165 static kmutex_t sequencer_lock; 166 167 static void 168 sequencerdestroy(struct sequencer_softc *sc) { 169 callout_destroy(&sc->sc_callout); 170 softint_disestablish(sc->sih); 171 cv_destroy(&sc->rchan); 172 cv_destroy(&sc->wchan); 173 cv_destroy(&sc->lchan); 174 if (sc->pcq) 175 pcq_destroy(sc->pcq); 176 kmem_free(sc, sizeof(*sc)); 177 } 178 179 static struct sequencer_softc * 180 sequencercreate(int unit) { 181 struct sequencer_softc *sc = kmem_zalloc(sizeof(*sc), KM_SLEEP); 182 if (sc == NULL) { 183 #ifdef DIAGNOSTIC 184 printf("%s: out of memory\n", __func__); 185 #endif 186 return NULL; 187 } 188 sc->sc_unit = unit; 189 callout_init(&sc->sc_callout, CALLOUT_MPSAFE); 190 sc->sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 191 seq_softintr, sc); 192 mutex_init(&sc->lock, MUTEX_DEFAULT, IPL_NONE); 193 cv_init(&sc->rchan, "midiseqr"); 194 cv_init(&sc->wchan, "midiseqw"); 195 cv_init(&sc->lchan, "midiseql"); 196 sc->pcq = pcq_create(SEQ_MAXQ, KM_SLEEP); 197 if (sc->pcq == NULL) { 198 sequencerdestroy(sc); 199 return NULL; 200 } 201 return sc; 202 } 203 204 205 static struct sequencer_softc * 206 sequencerget(int unit) { 207 struct sequencer_softc *sc; 208 if (unit < 0) { 209 #ifdef DIAGNOSTIC 210 panic("%s: unit %d!", __func__, unit); 211 #endif 212 return NULL; 213 } 214 mutex_enter(&sequencer_lock); 215 LIST_FOREACH(sc, &sequencers, sc_link) { 216 if (sc->sc_unit == unit) { 217 mutex_exit(&sequencer_lock); 218 return sc; 219 } 220 } 221 mutex_exit(&sequencer_lock); 222 if ((sc = sequencercreate(unit)) == NULL) 223 return NULL; 224 mutex_enter(&sequencer_lock); 225 LIST_INSERT_HEAD(&sequencers, sc, sc_link); 226 mutex_exit(&sequencer_lock); 227 return sc; 228 } 229 230 #ifdef notyet 231 static void 232 sequencerput(struct sequencer_softc *sc) { 233 mutex_enter(&sequencer_lock); 234 LIST_REMOVE(sc, sc_link); 235 mutex_exit(&sequencer_lock); 236 sequencerdestroy(sc); 237 } 238 #endif 239 240 void 241 sequencerattach(int n) 242 { 243 mutex_init(&sequencer_lock, MUTEX_DEFAULT, IPL_NONE); 244 } 245 246 /* 247 * Release reference to device acquired with sequencer_enter(). 248 */ 249 static void 250 sequencer_exit(struct sequencer_softc *sc) 251 { 252 253 sc->dvlock--; 254 cv_broadcast(&sc->lchan); 255 mutex_exit(&sc->lock); 256 } 257 258 /* 259 * Look up sequencer device and acquire locks for device access. 260 */ 261 static int 262 sequencer_enter(dev_t dev, struct sequencer_softc **scp) 263 { 264 struct sequencer_softc *sc; 265 266 /* First, find the device and take sc_lock. */ 267 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 268 return ENXIO; 269 mutex_enter(&sc->lock); 270 while (sc->dvlock) { 271 cv_wait(&sc->lchan, &sc->lock); 272 } 273 sc->dvlock++; 274 if (sc->dying) { 275 sequencer_exit(sc); 276 return EIO; 277 } 278 *scp = sc; 279 return 0; 280 } 281 282 static int 283 sequenceropen(dev_t dev, int flags, int ifmt, struct lwp *l) 284 { 285 struct sequencer_softc *sc; 286 struct midi_dev *md; 287 struct midi_softc *msc; 288 int error, unit; 289 290 DPRINTF(("sequenceropen\n")); 291 292 if ((error = sequencer_enter(dev, &sc)) != 0) 293 return error; 294 if (sc->isopen != 0) { 295 sequencer_exit(sc); 296 return EBUSY; 297 } 298 299 if (SEQ_IS_OLD(SEQUENCERUNIT(dev))) 300 sc->mode = SEQ_OLD; 301 else 302 sc->mode = SEQ_NEW; 303 sc->isopen++; 304 sc->flags = flags & (FREAD|FWRITE); 305 sc->pbus = 0; 306 sc->async = 0; 307 sc->input_stamp = ~0; 308 309 sc->nmidi = 0; 310 sc->ndevs = midi_unit_count(); 311 sc->timer.timebase_divperbeat = 100; 312 sc->timer.tempo_beatpermin = 60; 313 RECALC_USPERDIV(&sc->timer); 314 sc->timer.divs_lastevent = sc->timer.divs_lastchange = 0; 315 microtime(&sc->timer.reftime); 316 317 SEQ_QINIT(&sc->inq); 318 SEQ_QINIT(&sc->outq); 319 sc->lowat = SEQ_MAXQ / 2; 320 321 if (sc->ndevs > 0) { 322 mutex_exit(&sc->lock); 323 sc->devs = kmem_alloc(sc->ndevs * sizeof(struct midi_dev *), 324 KM_SLEEP); 325 for (unit = 0; unit < sc->ndevs; unit++) { 326 md = midiseq_open(unit, flags); 327 if (md) { 328 sc->devs[sc->nmidi++] = md; 329 md->seq = sc; 330 md->doingsysex = 0; 331 } 332 } 333 mutex_enter(&sc->lock); 334 } else { 335 sc->devs = NULL; 336 } 337 338 /* Only now redirect input from MIDI devices. */ 339 for (unit = 0; unit < sc->nmidi; unit++) { 340 msc = sc->devs[unit]->msc; 341 mutex_enter(msc->lock); 342 msc->seqopen = 1; 343 mutex_exit(msc->lock); 344 } 345 346 seq_reset(sc); 347 sequencer_exit(sc); 348 349 DPRINTF(("%s: mode=%d, nmidi=%d\n", __func__, sc->mode, sc->nmidi)); 350 return 0; 351 } 352 353 static int 354 seq_drain(struct sequencer_softc *sc) 355 { 356 int error; 357 358 KASSERT(mutex_owned(&sc->lock)); 359 360 DPRINTFN(3, ("seq_drain: %p, len=%d\n", sc, SEQ_QLEN(&sc->outq))); 361 seq_startoutput(sc); 362 error = 0; 363 while (!SEQ_QEMPTY(&sc->outq) && !error) 364 error = cv_timedwait_sig(&sc->wchan, &sc->lock, 60*hz); 365 return (error); 366 } 367 368 static void 369 seq_timeout(void *addr) 370 { 371 struct sequencer_softc *sc = addr; 372 proc_t *p; 373 pid_t pid; 374 375 DPRINTFN(4, ("seq_timeout: %p\n", sc)); 376 377 mutex_enter(&sc->lock); 378 if (sc->timeout == 0) { 379 mutex_spin_exit(&sc->lock); 380 return; 381 } 382 sc->timeout = 0; 383 seq_startoutput(sc); 384 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 385 mutex_exit(&sc->lock); 386 return; 387 } 388 cv_broadcast(&sc->wchan); 389 selnotify(&sc->wsel, 0, NOTE_SUBMIT); 390 if ((pid = sc->async) != 0) { 391 mutex_enter(proc_lock); 392 if ((p = proc_find(pid)) != NULL) 393 psignal(p, SIGIO); 394 mutex_exit(proc_lock); 395 } 396 mutex_exit(&sc->lock); 397 } 398 399 static void 400 seq_startoutput(struct sequencer_softc *sc) 401 { 402 struct sequencer_queue *q = &sc->outq; 403 seq_event_t cmd; 404 405 KASSERT(mutex_owned(&sc->lock)); 406 407 if (sc->timeout) 408 return; 409 DPRINTFN(4, ("seq_startoutput: %p, len=%d\n", sc, SEQ_QLEN(q))); 410 while (!SEQ_QEMPTY(q) && !sc->timeout) { 411 SEQ_QGET(q, cmd); 412 seq_do_command(sc, &cmd); 413 } 414 } 415 416 static int 417 sequencerclose(dev_t dev, int flags, int ifmt, struct lwp *l) 418 { 419 struct sequencer_softc *sc; 420 struct midi_softc *msc; 421 int unit, error; 422 423 DPRINTF(("sequencerclose: %"PRIx64"\n", dev)); 424 425 if ((error = sequencer_enter(dev, &sc)) != 0) 426 return error; 427 seq_drain(sc); 428 if (sc->timeout) { 429 callout_halt(&sc->sc_callout, &sc->lock); 430 sc->timeout = 0; 431 } 432 /* Bin input from MIDI devices. */ 433 for (unit = 0; unit < sc->nmidi; unit++) { 434 msc = sc->devs[unit]->msc; 435 mutex_enter(msc->lock); 436 msc->seqopen = 0; 437 mutex_exit(msc->lock); 438 } 439 mutex_exit(&sc->lock); 440 441 for (unit = 0; unit < sc->nmidi; unit++) 442 if (sc->devs[unit] != NULL) 443 midiseq_close(sc->devs[unit]); 444 if (sc->devs != NULL) { 445 KASSERT(sc->ndevs > 0); 446 kmem_free(sc->devs, sc->ndevs * sizeof(struct midi_dev *)); 447 sc->devs = NULL; 448 } 449 450 mutex_enter(&sc->lock); 451 sc->isopen = 0; 452 sequencer_exit(sc); 453 454 DPRINTF(("sequencerclose: %"PRIx64" done\n", dev)); 455 456 return (0); 457 } 458 459 static int 460 seq_input_event(struct sequencer_softc *sc, seq_event_t *cmd) 461 { 462 struct sequencer_queue *q; 463 464 KASSERT(mutex_owned(&sc->lock)); 465 466 DPRINTFN(2, ("seq_input_event: %02x %02x %02x %02x %02x " 467 "%02x %02x %02x\n", cmd->tag, 468 cmd->unknown.byte[0], cmd->unknown.byte[1], 469 cmd->unknown.byte[2], cmd->unknown.byte[3], 470 cmd->unknown.byte[4], cmd->unknown.byte[5], 471 cmd->unknown.byte[6])); 472 q = &sc->inq; 473 if (SEQ_QFULL(q)) 474 return (ENOMEM); 475 SEQ_QPUT(q, *cmd); 476 cv_broadcast(&sc->rchan); 477 selnotify(&sc->rsel, 0, NOTE_SUBMIT); 478 if (sc->async != 0) { 479 proc_t *p; 480 481 mutex_enter(proc_lock); 482 if ((p = proc_find(sc->async)) != NULL) 483 psignal(p, SIGIO); 484 mutex_exit(proc_lock); 485 } 486 return 0; 487 } 488 489 static void 490 seq_softintr(void *addr) 491 { 492 struct sequencer_softc *sc; 493 struct timeval now; 494 seq_event_t ev; 495 int status, chan, unit; 496 sequencer_pcqitem_t qi; 497 u_long t; 498 499 sc = addr; 500 501 mutex_enter(&sc->lock); 502 503 qi.qi_ptr = pcq_get(sc->pcq); 504 if (qi.qi_ptr == NULL) { 505 mutex_exit(&sc->lock); 506 return; 507 } 508 KASSERT((qi.qi_msg[3] & 0x80) != 0); 509 unit = qi.qi_msg[3] & ~0x80; 510 status = MIDI_GET_STATUS(qi.qi_msg[0]); 511 chan = MIDI_GET_CHAN(qi.qi_msg[0]); 512 switch (status) { 513 case MIDI_NOTEON: /* midi(4) always canonicalizes hidden note-off */ 514 ev = SEQ_MK_CHN(NOTEON, .device=unit, .channel=chan, 515 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 516 break; 517 case MIDI_NOTEOFF: 518 ev = SEQ_MK_CHN(NOTEOFF, .device=unit, .channel=chan, 519 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 520 break; 521 case MIDI_KEY_PRESSURE: 522 ev = SEQ_MK_CHN(KEY_PRESSURE, .device=unit, .channel=chan, 523 .key=qi.qi_msg[1], .pressure=qi.qi_msg[2]); 524 break; 525 case MIDI_CTL_CHANGE: /* XXX not correct for MSB */ 526 ev = SEQ_MK_CHN(CTL_CHANGE, .device=unit, .channel=chan, 527 .controller=qi.qi_msg[1], .value=qi.qi_msg[2]); 528 break; 529 case MIDI_PGM_CHANGE: 530 ev = SEQ_MK_CHN(PGM_CHANGE, .device=unit, .channel=chan, 531 .program=qi.qi_msg[1]); 532 break; 533 case MIDI_CHN_PRESSURE: 534 ev = SEQ_MK_CHN(CHN_PRESSURE, .device=unit, .channel=chan, 535 .pressure=qi.qi_msg[1]); 536 break; 537 case MIDI_PITCH_BEND: 538 ev = SEQ_MK_CHN(PITCH_BEND, .device=unit, .channel=chan, 539 .value=(qi.qi_msg[1] & 0x7f) | ((qi.qi_msg[2] & 0x7f) << 7)); 540 break; 541 default: /* this is now the point where MIDI_ACKs disappear */ 542 mutex_exit(&sc->lock); 543 return; 544 } 545 microtime(&now); 546 if (!sc->timer.running) 547 now = sc->timer.stoptime; 548 SUBTIMEVAL(&now, &sc->timer.reftime); 549 t = now.tv_sec * 1000000 + now.tv_usec; 550 t /= sc->timer.usperdiv; 551 t += sc->timer.divs_lastchange; 552 if (t != sc->input_stamp) { 553 seq_input_event(sc, &SEQ_MK_TIMING(WAIT_ABS, .divisions=t)); 554 sc->input_stamp = t; /* XXX wha hoppen if timer is reset? */ 555 } 556 seq_input_event(sc, &ev); 557 mutex_exit(&sc->lock); 558 } 559 560 static int 561 sequencerread(dev_t dev, struct uio *uio, int ioflag) 562 { 563 struct sequencer_softc *sc; 564 struct sequencer_queue *q; 565 seq_event_t ev; 566 int error; 567 568 DPRINTFN(20, ("sequencerread: %"PRIx64", count=%d, ioflag=%x\n", 569 dev, (int)uio->uio_resid, ioflag)); 570 571 if ((error = sequencer_enter(dev, &sc)) != 0) 572 return error; 573 q = &sc->inq; 574 575 if (sc->mode == SEQ_OLD) { 576 sequencer_exit(sc); 577 DPRINTFN(-1,("sequencerread: old read\n")); 578 return EINVAL; /* XXX unimplemented */ 579 } 580 while (SEQ_QEMPTY(q)) { 581 if (ioflag & IO_NDELAY) { 582 error = EWOULDBLOCK; 583 break; 584 } 585 /* Drop lock to allow concurrent read/write. */ 586 KASSERT(sc->dvlock != 0); 587 sc->dvlock--; 588 error = cv_wait_sig(&sc->rchan, &sc->lock); 589 while (sc->dvlock != 0) { 590 cv_wait(&sc->lchan, &sc->lock); 591 } 592 sc->dvlock++; 593 if (error) { 594 break; 595 } 596 } 597 while (uio->uio_resid >= sizeof(ev) && !error && !SEQ_QEMPTY(q)) { 598 SEQ_QGET(q, ev); 599 mutex_exit(&sc->lock); 600 error = uiomove(&ev, sizeof(ev), uio); 601 mutex_enter(&sc->lock); 602 } 603 sequencer_exit(sc); 604 return error; 605 } 606 607 static int 608 sequencerwrite(dev_t dev, struct uio *uio, int ioflag) 609 { 610 struct sequencer_softc *sc; 611 struct sequencer_queue *q; 612 int error; 613 seq_event_t cmdbuf; 614 int size; 615 616 DPRINTFN(2, ("sequencerwrite: %"PRIx64", count=%d\n", dev, 617 (int)uio->uio_resid)); 618 619 if ((error = sequencer_enter(dev, &sc)) != 0) 620 return error; 621 q = &sc->outq; 622 623 size = sc->mode == SEQ_NEW ? sizeof cmdbuf : SEQOLD_CMDSIZE; 624 while (uio->uio_resid >= size && error == 0) { 625 mutex_exit(&sc->lock); 626 error = uiomove(&cmdbuf, size, uio); 627 if (error == 0) { 628 if (sc->mode == SEQ_OLD && seq_to_new(&cmdbuf, uio)) { 629 mutex_enter(&sc->lock); 630 continue; 631 } 632 if (cmdbuf.tag == SEQ_FULLSIZE) { 633 /* We do it like OSS does, asynchronously */ 634 error = seq_do_fullsize(sc, &cmdbuf, uio); 635 if (error == 0) { 636 mutex_enter(&sc->lock); 637 continue; 638 } 639 } 640 } 641 mutex_enter(&sc->lock); 642 if (error != 0) { 643 break; 644 } 645 while (SEQ_QFULL(q)) { 646 seq_startoutput(sc); 647 if (SEQ_QFULL(q)) { 648 if (ioflag & IO_NDELAY) { 649 error = EWOULDBLOCK; 650 break; 651 } 652 error = cv_wait_sig(&sc->wchan, &sc->lock); 653 if (error) { 654 break; 655 } 656 } 657 } 658 if (error == 0) { 659 SEQ_QPUT(q, cmdbuf); 660 } 661 } 662 if (error == 0) { 663 seq_startoutput(sc); 664 } else { 665 DPRINTFN(2, ("sequencerwrite: error=%d\n", error)); 666 } 667 sequencer_exit(sc); 668 return error; 669 } 670 671 static int 672 sequencerioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 673 { 674 struct sequencer_softc *sc; 675 struct synth_info *si; 676 struct midi_dev *md; 677 int devno, error, t; 678 struct timeval now; 679 u_long tx; 680 681 DPRINTFN(2, ("sequencerioctl: %"PRIx64" cmd=0x%08lx\n", dev, cmd)); 682 683 if ((error = sequencer_enter(dev, &sc)) != 0) 684 return error; 685 switch (cmd) { 686 case FIONBIO: 687 /* All handled in the upper FS layer. */ 688 break; 689 690 case FIOASYNC: 691 if (*(int *)addr) { 692 if (sc->async != 0) 693 return EBUSY; 694 sc->async = curproc->p_pid; 695 DPRINTF(("sequencer_ioctl: FIOASYNC %d\n", 696 sc->async)); 697 } else { 698 sc->async = 0; 699 } 700 break; 701 702 case SEQUENCER_RESET: 703 seq_reset(sc); 704 break; 705 706 case SEQUENCER_PANIC: 707 seq_reset(sc); 708 /* Do more? OSS doesn't */ 709 break; 710 711 case SEQUENCER_SYNC: 712 if (sc->flags != FREAD) 713 seq_drain(sc); 714 break; 715 716 case SEQUENCER_INFO: 717 si = (struct synth_info*)addr; 718 devno = si->device; 719 if (devno < 0 || devno >= sc->nmidi) { 720 error = EINVAL; 721 break; 722 } 723 md = sc->devs[devno]; 724 strncpy(si->name, md->name, sizeof si->name); 725 si->synth_type = SYNTH_TYPE_MIDI; 726 si->synth_subtype = md->subtype; 727 si->nr_voices = md->nr_voices; 728 si->instr_bank_size = md->instr_bank_size; 729 si->capabilities = md->capabilities; 730 break; 731 732 case SEQUENCER_NRSYNTHS: 733 *(int *)addr = sc->nmidi; 734 break; 735 736 case SEQUENCER_NRMIDIS: 737 *(int *)addr = sc->nmidi; 738 break; 739 740 case SEQUENCER_OUTOFBAND: 741 DPRINTFN(3, ("sequencer_ioctl: OOB=%02x %02x %02x %02x %02x %02x %02x %02x\n", 742 *(u_char *)addr, *((u_char *)addr+1), 743 *((u_char *)addr+2), *((u_char *)addr+3), 744 *((u_char *)addr+4), *((u_char *)addr+5), 745 *((u_char *)addr+6), *((u_char *)addr+7))); 746 if ((sc->flags & FWRITE) == 0) { 747 error = EBADF; 748 } else { 749 error = seq_do_command(sc, (seq_event_t *)addr); 750 } 751 break; 752 753 case SEQUENCER_TMR_TIMEBASE: 754 t = *(int *)addr; 755 if (t < 1) 756 t = 1; 757 if (t > 10000) 758 t = 10000; 759 *(int *)addr = t; 760 sc->timer.timebase_divperbeat = t; 761 sc->timer.divs_lastchange = sc->timer.divs_lastevent; 762 microtime(&sc->timer.reftime); 763 RECALC_USPERDIV(&sc->timer); 764 break; 765 766 case SEQUENCER_TMR_START: 767 error = seq_do_timing(sc, &SEQ_MK_TIMING(START)); 768 break; 769 770 case SEQUENCER_TMR_STOP: 771 error = seq_do_timing(sc, &SEQ_MK_TIMING(STOP)); 772 break; 773 774 case SEQUENCER_TMR_CONTINUE: 775 error = seq_do_timing(sc, &SEQ_MK_TIMING(CONTINUE)); 776 break; 777 778 case SEQUENCER_TMR_TEMPO: 779 error = seq_do_timing(sc, 780 &SEQ_MK_TIMING(TEMPO, .bpm=*(int *)addr)); 781 if (error == 0) 782 *(int *)addr = sc->timer.tempo_beatpermin; 783 break; 784 785 case SEQUENCER_TMR_SOURCE: 786 *(int *)addr = SEQUENCER_TMR_INTERNAL; 787 break; 788 789 case SEQUENCER_TMR_METRONOME: 790 /* noop */ 791 break; 792 793 case SEQUENCER_THRESHOLD: 794 t = SEQ_MAXQ - *(int *)addr / sizeof (seq_event_rec); 795 if (t < 1) 796 t = 1; 797 if (t > SEQ_MAXQ) 798 t = SEQ_MAXQ; 799 sc->lowat = t; 800 break; 801 802 case SEQUENCER_CTRLRATE: 803 *(int *)addr = (sc->timer.tempo_beatpermin 804 *sc->timer.timebase_divperbeat + 30) / 60; 805 break; 806 807 case SEQUENCER_GETTIME: 808 microtime(&now); 809 SUBTIMEVAL(&now, &sc->timer.reftime); 810 tx = now.tv_sec * 1000000 + now.tv_usec; 811 tx /= sc->timer.usperdiv; 812 tx += sc->timer.divs_lastchange; 813 *(int *)addr = tx; 814 break; 815 816 default: 817 DPRINTFN(-1,("sequencer_ioctl: unimpl %08lx\n", cmd)); 818 error = EINVAL; 819 break; 820 } 821 sequencer_exit(sc); 822 823 return error; 824 } 825 826 static int 827 sequencerpoll(dev_t dev, int events, struct lwp *l) 828 { 829 struct sequencer_softc *sc; 830 int revents = 0; 831 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 832 return ENXIO; 833 834 DPRINTF(("sequencerpoll: %p events=0x%x\n", sc, events)); 835 836 mutex_enter(&sc->lock); 837 if (events & (POLLIN | POLLRDNORM)) 838 if ((sc->flags&FREAD) && !SEQ_QEMPTY(&sc->inq)) 839 revents |= events & (POLLIN | POLLRDNORM); 840 841 if (events & (POLLOUT | POLLWRNORM)) 842 if ((sc->flags&FWRITE) && SEQ_QLEN(&sc->outq) < sc->lowat) 843 revents |= events & (POLLOUT | POLLWRNORM); 844 845 if (revents == 0) { 846 if ((sc->flags&FREAD) && (events & (POLLIN | POLLRDNORM))) 847 selrecord(l, &sc->rsel); 848 849 if ((sc->flags&FWRITE) && (events & (POLLOUT | POLLWRNORM))) 850 selrecord(l, &sc->wsel); 851 } 852 mutex_exit(&sc->lock); 853 854 return revents; 855 } 856 857 static void 858 filt_sequencerrdetach(struct knote *kn) 859 { 860 struct sequencer_softc *sc = kn->kn_hook; 861 862 mutex_enter(&sc->lock); 863 SLIST_REMOVE(&sc->rsel.sel_klist, kn, knote, kn_selnext); 864 mutex_exit(&sc->lock); 865 } 866 867 static int 868 filt_sequencerread(struct knote *kn, long hint) 869 { 870 struct sequencer_softc *sc = kn->kn_hook; 871 int rv; 872 873 if (hint != NOTE_SUBMIT) { 874 mutex_enter(&sc->lock); 875 } 876 if (SEQ_QEMPTY(&sc->inq)) { 877 rv = 0; 878 } else { 879 kn->kn_data = sizeof(seq_event_rec); 880 rv = 1; 881 } 882 if (hint != NOTE_SUBMIT) { 883 mutex_exit(&sc->lock); 884 } 885 return rv; 886 } 887 888 static const struct filterops sequencerread_filtops = 889 { 1, NULL, filt_sequencerrdetach, filt_sequencerread }; 890 891 static void 892 filt_sequencerwdetach(struct knote *kn) 893 { 894 struct sequencer_softc *sc = kn->kn_hook; 895 896 mutex_enter(&sc->lock); 897 SLIST_REMOVE(&sc->wsel.sel_klist, kn, knote, kn_selnext); 898 mutex_exit(&sc->lock); 899 } 900 901 static int 902 filt_sequencerwrite(struct knote *kn, long hint) 903 { 904 struct sequencer_softc *sc = kn->kn_hook; 905 int rv; 906 907 if (hint != NOTE_SUBMIT) { 908 mutex_enter(&sc->lock); 909 } 910 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 911 rv = 0; 912 } else { 913 kn->kn_data = sizeof(seq_event_rec); 914 rv = 1; 915 } 916 if (hint != NOTE_SUBMIT) { 917 mutex_exit(&sc->lock); 918 } 919 return rv; 920 } 921 922 static const struct filterops sequencerwrite_filtops = 923 { 1, NULL, filt_sequencerwdetach, filt_sequencerwrite }; 924 925 static int 926 sequencerkqfilter(dev_t dev, struct knote *kn) 927 { 928 struct sequencer_softc *sc; 929 struct klist *klist; 930 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 931 return ENXIO; 932 933 switch (kn->kn_filter) { 934 case EVFILT_READ: 935 klist = &sc->rsel.sel_klist; 936 kn->kn_fop = &sequencerread_filtops; 937 break; 938 939 case EVFILT_WRITE: 940 klist = &sc->wsel.sel_klist; 941 kn->kn_fop = &sequencerwrite_filtops; 942 break; 943 944 default: 945 return (EINVAL); 946 } 947 948 kn->kn_hook = sc; 949 950 mutex_enter(&sc->lock); 951 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 952 mutex_exit(&sc->lock); 953 954 return (0); 955 } 956 957 static void 958 seq_reset(struct sequencer_softc *sc) 959 { 960 int i, chn; 961 struct midi_dev *md; 962 963 KASSERT(mutex_owned(&sc->lock)); 964 965 if ( !(sc->flags & FWRITE) ) 966 return; 967 for (i = 0; i < sc->nmidi; i++) { 968 md = sc->devs[i]; 969 midiseq_reset(md); 970 for (chn = 0; chn < MAXCHAN; chn++) { 971 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 972 .controller=MIDI_CTRL_NOTES_OFF)); 973 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 974 .controller=MIDI_CTRL_RESET)); 975 midiseq_pitchbend(md, chn, &SEQ_MK_CHN(PITCH_BEND, 976 .value=MIDI_BEND_NEUTRAL)); 977 } 978 } 979 } 980 981 static int 982 seq_do_command(struct sequencer_softc *sc, seq_event_t *b) 983 { 984 int dev; 985 986 KASSERT(mutex_owned(&sc->lock)); 987 988 DPRINTFN(4, ("seq_do_command: %p cmd=0x%02x\n", sc, b->timing.op)); 989 990 switch(b->tag) { 991 case SEQ_LOCAL: 992 return seq_do_local(sc, b); 993 case SEQ_TIMING: 994 return seq_do_timing(sc, b); 995 case SEQ_CHN_VOICE: 996 return seq_do_chnvoice(sc, b); 997 case SEQ_CHN_COMMON: 998 return seq_do_chncommon(sc, b); 999 case SEQ_SYSEX: 1000 return seq_do_sysex(sc, b); 1001 /* COMPAT */ 1002 case SEQOLD_MIDIPUTC: 1003 dev = b->putc.device; 1004 if (dev < 0 || dev >= sc->nmidi) 1005 return (ENXIO); 1006 return midiseq_out(sc->devs[dev], &b->putc.byte, 1, 0); 1007 default: 1008 DPRINTFN(-1,("seq_do_command: unimpl command %02x\n", b->tag)); 1009 return (EINVAL); 1010 } 1011 } 1012 1013 static int 1014 seq_do_chnvoice(struct sequencer_softc *sc, seq_event_t *b) 1015 { 1016 int dev; 1017 int error; 1018 struct midi_dev *md; 1019 1020 KASSERT(mutex_owned(&sc->lock)); 1021 1022 dev = b->voice.device; 1023 if (dev < 0 || dev >= sc->nmidi || 1024 b->voice.channel > 15 || 1025 b->voice.key >= SEQ_NOTE_MAX) 1026 return ENXIO; 1027 md = sc->devs[dev]; 1028 switch(b->voice.op) { 1029 case MIDI_NOTEON: /* no need to special-case hidden noteoff here */ 1030 error = midiseq_noteon(md, b->voice.channel, b->voice.key, b); 1031 break; 1032 case MIDI_NOTEOFF: 1033 error = midiseq_noteoff(md, b->voice.channel, b->voice.key, b); 1034 break; 1035 case MIDI_KEY_PRESSURE: 1036 error = midiseq_keypressure(md, 1037 b->voice.channel, b->voice.key, b); 1038 break; 1039 default: 1040 DPRINTFN(-1,("seq_do_chnvoice: unimpl command %02x\n", 1041 b->voice.op)); 1042 error = EINVAL; 1043 break; 1044 } 1045 return error; 1046 } 1047 1048 static int 1049 seq_do_chncommon(struct sequencer_softc *sc, seq_event_t *b) 1050 { 1051 int dev; 1052 int error; 1053 struct midi_dev *md; 1054 1055 KASSERT(mutex_owned(&sc->lock)); 1056 1057 dev = b->common.device; 1058 if (dev < 0 || dev >= sc->nmidi || 1059 b->common.channel > 15) 1060 return ENXIO; 1061 md = sc->devs[dev]; 1062 DPRINTFN(2,("seq_do_chncommon: %02x\n", b->common.op)); 1063 1064 error = 0; 1065 switch(b->common.op) { 1066 case MIDI_PGM_CHANGE: 1067 error = midiseq_pgmchange(md, b->common.channel, b); 1068 break; 1069 case MIDI_CTL_CHANGE: 1070 error = midiseq_ctlchange(md, b->common.channel, b); 1071 break; 1072 case MIDI_PITCH_BEND: 1073 error = midiseq_pitchbend(md, b->common.channel, b); 1074 break; 1075 case MIDI_CHN_PRESSURE: 1076 error = midiseq_chnpressure(md, b->common.channel, b); 1077 break; 1078 default: 1079 DPRINTFN(-1,("seq_do_chncommon: unimpl command %02x\n", 1080 b->common.op)); 1081 error = EINVAL; 1082 break; 1083 } 1084 return error; 1085 } 1086 1087 static int 1088 seq_do_local(struct sequencer_softc *sc, seq_event_t *b) 1089 { 1090 1091 KASSERT(mutex_owned(&sc->lock)); 1092 1093 return (EINVAL); 1094 } 1095 1096 static int 1097 seq_do_sysex(struct sequencer_softc *sc, seq_event_t *b) 1098 { 1099 int dev, i; 1100 struct midi_dev *md; 1101 uint8_t *bf = b->sysex.buffer; 1102 1103 KASSERT(mutex_owned(&sc->lock)); 1104 1105 dev = b->sysex.device; 1106 if (dev < 0 || dev >= sc->nmidi) 1107 return (ENXIO); 1108 DPRINTF(("seq_do_sysex: dev=%d\n", dev)); 1109 md = sc->devs[dev]; 1110 1111 if (!md->doingsysex) { 1112 midiseq_out(md, (uint8_t[]){MIDI_SYSEX_START}, 1, 0); 1113 md->doingsysex = 1; 1114 } 1115 1116 for (i = 0; i < 6 && bf[i] != 0xff; i++) 1117 ; 1118 midiseq_out(md, bf, i, 0); 1119 if (i < 6 || (i > 0 && bf[i-1] == MIDI_SYSEX_END)) 1120 md->doingsysex = 0; 1121 return 0; 1122 } 1123 1124 static void 1125 seq_timer_waitabs(struct sequencer_softc *sc, uint32_t divs) 1126 { 1127 struct timeval when; 1128 long long usec; 1129 struct syn_timer *t; 1130 int ticks; 1131 1132 KASSERT(mutex_owned(&sc->lock)); 1133 1134 t = &sc->timer; 1135 t->divs_lastevent = divs; 1136 divs -= t->divs_lastchange; 1137 usec = (long long)divs * (long long)t->usperdiv; /* convert to usec */ 1138 when.tv_sec = usec / 1000000; 1139 when.tv_usec = usec % 1000000; 1140 DPRINTFN(4, ("seq_timer_waitabs: adjdivs=%d, sleep when=%"PRId64".%06"PRId64, 1141 divs, when.tv_sec, (uint64_t)when.tv_usec)); 1142 ADDTIMEVAL(&when, &t->reftime); /* abstime for end */ 1143 ticks = tvhzto(&when); 1144 DPRINTFN(4, (" when+start=%"PRId64".%06"PRId64", tick=%d\n", 1145 when.tv_sec, (uint64_t)when.tv_usec, ticks)); 1146 if (ticks > 0) { 1147 #ifdef DIAGNOSTIC 1148 if (ticks > 20 * hz) { 1149 /* Waiting more than 20s */ 1150 printf("seq_timer_waitabs: funny ticks=%d, " 1151 "usec=%lld\n", ticks, usec); 1152 } 1153 #endif 1154 sc->timeout = 1; 1155 callout_reset(&sc->sc_callout, ticks, 1156 seq_timeout, sc); 1157 } 1158 #ifdef SEQUENCER_DEBUG 1159 else if (tick < 0) 1160 DPRINTF(("seq_timer_waitabs: ticks = %d\n", ticks)); 1161 #endif 1162 } 1163 1164 static int 1165 seq_do_timing(struct sequencer_softc *sc, seq_event_t *b) 1166 { 1167 struct syn_timer *t = &sc->timer; 1168 struct timeval when; 1169 int error; 1170 1171 KASSERT(mutex_owned(&sc->lock)); 1172 1173 error = 0; 1174 switch(b->timing.op) { 1175 case TMR_WAIT_REL: 1176 seq_timer_waitabs(sc, 1177 b->t_WAIT_REL.divisions + t->divs_lastevent); 1178 break; 1179 case TMR_WAIT_ABS: 1180 seq_timer_waitabs(sc, b->t_WAIT_ABS.divisions); 1181 break; 1182 case TMR_START: 1183 microtime(&t->reftime); 1184 t->divs_lastevent = t->divs_lastchange = 0; 1185 t->running = 1; 1186 break; 1187 case TMR_STOP: 1188 microtime(&t->stoptime); 1189 t->running = 0; 1190 break; 1191 case TMR_CONTINUE: 1192 if (t->running) 1193 break; 1194 microtime(&when); 1195 SUBTIMEVAL(&when, &t->stoptime); 1196 ADDTIMEVAL(&t->reftime, &when); 1197 t->running = 1; 1198 break; 1199 case TMR_TEMPO: 1200 /* bpm is unambiguously MIDI clocks per minute / 24 */ 1201 /* (24 MIDI clocks are usually but not always a quarter note) */ 1202 if (b->t_TEMPO.bpm < 8) /* where are these limits specified? */ 1203 t->tempo_beatpermin = 8; 1204 else if (b->t_TEMPO.bpm > 360) /* ? */ 1205 t->tempo_beatpermin = 360; 1206 else 1207 t->tempo_beatpermin = b->t_TEMPO.bpm; 1208 t->divs_lastchange = t->divs_lastevent; 1209 microtime(&t->reftime); 1210 RECALC_USPERDIV(t); 1211 break; 1212 case TMR_ECHO: 1213 error = seq_input_event(sc, b); 1214 break; 1215 case TMR_RESET: 1216 t->divs_lastevent = t->divs_lastchange = 0; 1217 microtime(&t->reftime); 1218 break; 1219 case TMR_SPP: 1220 case TMR_TIMESIG: 1221 DPRINTF(("seq_do_timing: unimplemented %02x\n", b->timing.op)); 1222 error = EINVAL; /* not quite accurate... */ 1223 break; 1224 default: 1225 DPRINTF(("seq_timer: unknown %02x\n", b->timing.op)); 1226 error = EINVAL; 1227 break; 1228 } 1229 return (error); 1230 } 1231 1232 static int 1233 seq_do_fullsize(struct sequencer_softc *sc, seq_event_t *b, struct uio *uio) 1234 { 1235 struct sysex_info sysex; 1236 u_int dev; 1237 1238 #ifdef DIAGNOSTIC 1239 if (sizeof(seq_event_rec) != SEQ_SYSEX_HDRSIZE) { 1240 printf("seq_do_fullsize: sysex size ??\n"); 1241 return EINVAL; 1242 } 1243 #endif 1244 memcpy(&sysex, b, sizeof sysex); 1245 dev = sysex.device_no; 1246 if (/* dev < 0 || */ dev >= sc->nmidi) 1247 return (ENXIO); 1248 DPRINTFN(2, ("seq_do_fullsize: fmt=%04x, dev=%d, len=%d\n", 1249 sysex.key, dev, sysex.len)); 1250 return (midiseq_loadpatch(sc->devs[dev], &sysex, uio)); 1251 } 1252 1253 /* 1254 * Convert an old sequencer event to a new one. 1255 * NOTE: on entry, *ev may contain valid data only in the first 4 bytes. 1256 * That may be true even on exit (!) in the case of SEQOLD_MIDIPUTC; the 1257 * caller will only look at the first bytes in that case anyway. Ugly? Sure. 1258 */ 1259 static int 1260 seq_to_new(seq_event_t *ev, struct uio *uio) 1261 { 1262 int cmd, chan, note, parm; 1263 uint32_t tmp_delay; 1264 int error; 1265 uint8_t *bfp; 1266 1267 cmd = ev->tag; 1268 bfp = ev->unknown.byte; 1269 chan = *bfp++; 1270 note = *bfp++; 1271 parm = *bfp++; 1272 DPRINTFN(3, ("seq_to_new: 0x%02x %d %d %d\n", cmd, chan, note, parm)); 1273 1274 if (cmd >= 0x80) { 1275 /* Fill the event record */ 1276 if (uio->uio_resid >= sizeof *ev - SEQOLD_CMDSIZE) { 1277 error = uiomove(bfp, sizeof *ev - SEQOLD_CMDSIZE, uio); 1278 if (error) 1279 return error; 1280 } else 1281 return EINVAL; 1282 } 1283 1284 switch(cmd) { 1285 case SEQOLD_NOTEOFF: 1286 /* 1287 * What's with the SEQ_NOTE_XXX? In OSS this seems to have 1288 * been undocumented magic for messing with the overall volume 1289 * of a 'voice', equated precariously with 'channel' and 1290 * pretty much unimplementable except by directly frobbing a 1291 * synth chip. For us, who treat everything as interfaced over 1292 * MIDI, this will just be unceremoniously discarded as 1293 * invalid in midiseq_noteoff, making the whole event an 1294 * elaborate no-op, and that doesn't seem to be any different 1295 * from what happens on linux with a MIDI-interfaced device, 1296 * by the way. The moral is ... use the new /dev/music API, ok? 1297 */ 1298 *ev = SEQ_MK_CHN(NOTEOFF, .device=0, .channel=chan, 1299 .key=SEQ_NOTE_XXX, .velocity=parm); 1300 break; 1301 case SEQOLD_NOTEON: 1302 *ev = SEQ_MK_CHN(NOTEON, 1303 .device=0, .channel=chan, .key=note, .velocity=parm); 1304 break; 1305 case SEQOLD_WAIT: 1306 /* 1307 * This event cannot even /exist/ on non-littleendian machines, 1308 * and so help me, that's exactly the way OSS defined it. 1309 * Also, the OSS programmer's guide states (p. 74, v1.11) 1310 * that seqold time units are system clock ticks, unlike 1311 * the new 'divisions' which are determined by timebase. In 1312 * that case we would need to do scaling here - but no such 1313 * behavior is visible in linux either--which also treats this 1314 * value, surprisingly, as an absolute, not relative, time. 1315 * My guess is that this event has gone unused so long that 1316 * nobody could agree we got it wrong no matter what we do. 1317 */ 1318 tmp_delay = *(uint32_t *)ev >> 8; 1319 *ev = SEQ_MK_TIMING(WAIT_ABS, .divisions=tmp_delay); 1320 break; 1321 case SEQOLD_SYNCTIMER: 1322 /* 1323 * The TMR_RESET event is not defined in any OSS materials 1324 * I can find; it may have been invented here just to provide 1325 * an accurate _to_new translation of this event. 1326 */ 1327 *ev = SEQ_MK_TIMING(RESET); 1328 break; 1329 case SEQOLD_PGMCHANGE: 1330 *ev = SEQ_MK_CHN(PGM_CHANGE, 1331 .device=0, .channel=chan, .program=note); 1332 break; 1333 case SEQOLD_MIDIPUTC: 1334 break; /* interpret in normal mode */ 1335 case SEQOLD_ECHO: 1336 case SEQOLD_PRIVATE: 1337 case SEQOLD_EXTENDED: 1338 default: 1339 DPRINTF(("seq_to_new: not impl 0x%02x\n", cmd)); 1340 return EINVAL; 1341 /* In case new-style events show up */ 1342 case SEQ_TIMING: 1343 case SEQ_CHN_VOICE: 1344 case SEQ_CHN_COMMON: 1345 case SEQ_FULLSIZE: 1346 break; 1347 } 1348 return 0; 1349 } 1350 1351 /**********************************************/ 1352 1353 void 1354 midiseq_in(struct midi_dev *md, u_char *msg, int len) 1355 { 1356 struct sequencer_softc *sc; 1357 sequencer_pcqitem_t qi; 1358 1359 DPRINTFN(2, ("midiseq_in: %p %02x %02x %02x\n", 1360 md, msg[0], msg[1], msg[2])); 1361 1362 sc = md->seq; 1363 1364 qi.qi_msg[0] = msg[0]; 1365 qi.qi_msg[1] = msg[1]; 1366 qi.qi_msg[2] = msg[2]; 1367 qi.qi_msg[3] = md->unit | 0x80; /* ensure non-zero value of qi_ptr */ 1368 pcq_put(sc->pcq, qi.qi_ptr); 1369 softint_schedule(sc->sih); 1370 } 1371 1372 static struct midi_dev * 1373 midiseq_open(int unit, int flags) 1374 { 1375 extern struct cfdriver midi_cd; 1376 int error; 1377 struct midi_dev *md; 1378 struct midi_softc *sc; 1379 struct midi_info mi; 1380 int major; 1381 dev_t dev; 1382 vnode_t *vp; 1383 int oflags; 1384 1385 major = devsw_name2chr("midi", NULL, 0); 1386 dev = makedev(major, unit); 1387 1388 DPRINTFN(2, ("midiseq_open: %d %d\n", unit, flags)); 1389 1390 error = cdevvp(dev, &vp); 1391 if (error) 1392 return NULL; 1393 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1394 error = VOP_OPEN(vp, flags, kauth_cred_get()); 1395 VOP_UNLOCK(vp); 1396 if (error) { 1397 vrele(vp); 1398 return NULL; 1399 } 1400 1401 /* Only after we have acquired reference via VOP_OPEN(). */ 1402 midi_getinfo(dev, &mi); 1403 oflags = flags; 1404 if ((mi.props & MIDI_PROP_CAN_INPUT) == 0) 1405 flags &= ~FREAD; 1406 if ((flags & (FREAD|FWRITE)) == 0) { 1407 VOP_CLOSE(vp, oflags, kauth_cred_get()); 1408 vrele(vp); 1409 return NULL; 1410 } 1411 1412 sc = device_lookup_private(&midi_cd, unit); 1413 md = kmem_zalloc(sizeof(*md), KM_SLEEP); 1414 md->msc = sc; 1415 md->unit = unit; 1416 md->name = mi.name; 1417 md->subtype = 0; 1418 md->nr_voices = 128; /* XXX */ 1419 md->instr_bank_size = 128; /* XXX */ 1420 md->vp = vp; 1421 if (mi.props & MIDI_PROP_CAN_INPUT) 1422 md->capabilities |= SYNTH_CAP_INPUT; 1423 sc->seq_md = md; 1424 return (md); 1425 } 1426 1427 static void 1428 midiseq_close(struct midi_dev *md) 1429 { 1430 DPRINTFN(2, ("midiseq_close: %d\n", md->unit)); 1431 (void)vn_close(md->vp, 0, kauth_cred_get()); 1432 kmem_free(md, sizeof(*md)); 1433 } 1434 1435 static void 1436 midiseq_reset(struct midi_dev *md) 1437 { 1438 /* XXX send GM reset? */ 1439 DPRINTFN(3, ("midiseq_reset: %d\n", md->unit)); 1440 } 1441 1442 static int 1443 midiseq_out(struct midi_dev *md, u_char *bf, u_int cc, int chk) 1444 { 1445 DPRINTFN(5, ("midiseq_out: m=%p, unit=%d, bf[0]=0x%02x, cc=%d\n", 1446 md->msc, md->unit, bf[0], cc)); 1447 1448 /* midi(4) does running status compression where appropriate. */ 1449 return midi_writebytes(md->unit, bf, cc); 1450 } 1451 1452 /* 1453 * If the writing process hands us a hidden note-off in a note-on event, 1454 * we will simply write it that way; no need to special case it here, 1455 * as midi(4) will always canonicalize or compress as appropriate anyway. 1456 */ 1457 static int 1458 midiseq_noteon(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1459 { 1460 return midiseq_out(md, (uint8_t[]){ 1461 MIDI_NOTEON | chan, key, ev->c_NOTEON.velocity & 0x7f}, 3, 1); 1462 } 1463 1464 static int 1465 midiseq_noteoff(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1466 { 1467 return midiseq_out(md, (uint8_t[]){ 1468 MIDI_NOTEOFF | chan, key, ev->c_NOTEOFF.velocity & 0x7f}, 3, 1); 1469 } 1470 1471 static int 1472 midiseq_keypressure(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1473 { 1474 return midiseq_out(md, (uint8_t[]){ 1475 MIDI_KEY_PRESSURE | chan, key, 1476 ev->c_KEY_PRESSURE.pressure & 0x7f}, 3, 1); 1477 } 1478 1479 static int 1480 midiseq_pgmchange(struct midi_dev *md, int chan, seq_event_t *ev) 1481 { 1482 if (ev->c_PGM_CHANGE.program > 127) 1483 return EINVAL; 1484 return midiseq_out(md, (uint8_t[]){ 1485 MIDI_PGM_CHANGE | chan, ev->c_PGM_CHANGE.program}, 2, 1); 1486 } 1487 1488 static int 1489 midiseq_chnpressure(struct midi_dev *md, int chan, seq_event_t *ev) 1490 { 1491 if (ev->c_CHN_PRESSURE.pressure > 127) 1492 return EINVAL; 1493 return midiseq_out(md, (uint8_t[]){ 1494 MIDI_CHN_PRESSURE | chan, ev->c_CHN_PRESSURE.pressure}, 2, 1); 1495 } 1496 1497 static int 1498 midiseq_ctlchange(struct midi_dev *md, int chan, seq_event_t *ev) 1499 { 1500 if (ev->c_CTL_CHANGE.controller > 127) 1501 return EINVAL; 1502 return midiseq_out( md, (uint8_t[]){ 1503 MIDI_CTL_CHANGE | chan, ev->c_CTL_CHANGE.controller, 1504 ev->c_CTL_CHANGE.value & 0x7f /* XXX this is SO wrong */ 1505 }, 3, 1); 1506 } 1507 1508 static int 1509 midiseq_pitchbend(struct midi_dev *md, int chan, seq_event_t *ev) 1510 { 1511 return midiseq_out(md, (uint8_t[]){ 1512 MIDI_PITCH_BEND | chan, 1513 ev->c_PITCH_BEND.value & 0x7f, 1514 (ev->c_PITCH_BEND.value >> 7) & 0x7f}, 3, 1); 1515 } 1516 1517 static int 1518 midiseq_loadpatch(struct midi_dev *md, 1519 struct sysex_info *sysex, struct uio *uio) 1520 { 1521 struct sequencer_softc *sc; 1522 u_char c, bf[128]; 1523 int i, cc, error; 1524 1525 if (sysex->key != SEQ_SYSEX_PATCH) { 1526 DPRINTFN(-1,("midiseq_loadpatch: bad patch key 0x%04x\n", 1527 sysex->key)); 1528 return (EINVAL); 1529 } 1530 if (uio->uio_resid < sysex->len) 1531 /* adjust length, should be an error */ 1532 sysex->len = uio->uio_resid; 1533 1534 DPRINTFN(2, ("midiseq_loadpatch: len=%d\n", sysex->len)); 1535 if (sysex->len == 0) 1536 return EINVAL; 1537 error = uiomove(&c, 1, uio); 1538 if (error) 1539 return error; 1540 if (c != MIDI_SYSEX_START) /* must start like this */ 1541 return EINVAL; 1542 sc = md->seq; 1543 mutex_enter(&sc->lock); 1544 error = midiseq_out(md, &c, 1, 0); 1545 mutex_exit(&sc->lock); 1546 if (error) 1547 return error; 1548 --sysex->len; 1549 while (sysex->len > 0) { 1550 cc = sysex->len; 1551 if (cc > sizeof bf) 1552 cc = sizeof bf; 1553 error = uiomove(bf, cc, uio); 1554 if (error) 1555 break; 1556 for(i = 0; i < cc && !MIDI_IS_STATUS(bf[i]); i++) 1557 ; 1558 /* 1559 * XXX midi(4)'s buffer might not accommodate this, and the 1560 * function will not block us (though in this case we have 1561 * a process and could in principle block). 1562 */ 1563 mutex_enter(&sc->lock); 1564 error = midiseq_out(md, bf, i, 0); 1565 mutex_exit(&sc->lock); 1566 if (error) 1567 break; 1568 sysex->len -= i; 1569 if (i != cc) 1570 break; 1571 } 1572 /* 1573 * Any leftover data in uio is rubbish; 1574 * the SYSEX should be one write ending in SYSEX_END. 1575 */ 1576 uio->uio_resid = 0; 1577 c = MIDI_SYSEX_END; 1578 mutex_enter(&sc->lock); 1579 error = midiseq_out(md, &c, 1, 0); 1580 mutex_exit(&sc->lock); 1581 return error; 1582 } 1583 1584 #include "midi.h" 1585 #if NMIDI == 0 1586 static dev_type_open(midiopen); 1587 static dev_type_close(midiclose); 1588 1589 const struct cdevsw midi_cdevsw = { 1590 midiopen, midiclose, noread, nowrite, noioctl, 1591 nostop, notty, nopoll, nommap, nokqfilter, D_OTHER | D_MPSAFE 1592 }; 1593 1594 /* 1595 * If someone has a sequencer, but no midi devices there will 1596 * be unresolved references, so we provide little stubs. 1597 */ 1598 1599 int 1600 midi_unit_count(void) 1601 { 1602 return (0); 1603 } 1604 1605 static int 1606 midiopen(dev_t dev, int flags, int ifmt, struct lwp *l) 1607 { 1608 return (ENXIO); 1609 } 1610 1611 struct cfdriver midi_cd; 1612 1613 void 1614 midi_getinfo(dev_t dev, struct midi_info *mi) 1615 { 1616 mi->name = "Dummy MIDI device"; 1617 mi->props = 0; 1618 } 1619 1620 static int 1621 midiclose(dev_t dev, int flags, int ifmt, struct lwp *l) 1622 { 1623 return (ENXIO); 1624 } 1625 1626 int 1627 midi_writebytes(int unit, u_char *bf, int cc) 1628 { 1629 return (ENXIO); 1630 } 1631 #endif /* NMIDI == 0 */ 1632