1 /* $NetBSD: sequencer.c,v 1.84 2023/10/17 09:59:46 riastradh 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 (at) 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 1.84 2023/10/17 09:59:46 riastradh Exp $"); 59 60 #ifdef _KERNEL_OPT 61 #include "midi.h" 62 #endif 63 64 #include <sys/param.h> 65 #include <sys/types.h> 66 67 #include <sys/atomic.h> 68 #include <sys/audioio.h> 69 #include <sys/conf.h> 70 #include <sys/device.h> 71 #include <sys/fcntl.h> 72 #include <sys/intr.h> 73 #include <sys/ioctl.h> 74 #include <sys/kauth.h> 75 #include <sys/kernel.h> 76 #include <sys/kmem.h> 77 #include <sys/midiio.h> 78 #include <sys/pcq.h> 79 #include <sys/poll.h> 80 #include <sys/proc.h> 81 #include <sys/select.h> 82 #include <sys/signalvar.h> 83 #include <sys/syslog.h> 84 #include <sys/systm.h> 85 #include <sys/vnode.h> 86 #include <sys/vnode.h> 87 88 #include <dev/midi_if.h> 89 #include <dev/midivar.h> 90 #include <dev/sequencervar.h> 91 92 #include "ioconf.h" 93 94 /* 95 * XXX Kludge. This module uses midi_cd, and depends on the `midi' 96 * module, but there's no obvious way to get midi_cd declared in 97 * ioconf.h without actually pulling MIDI into the module in 98 * sys/modules/sequencer/sequencer.ioconf. Please fix me! 99 * 100 * XXX XXX XXX Apparently sequencer.ioconf doesn't actually make the 101 * sequencer cdev! Did this ever work? 102 * 103 * XXX XXX XXX Apparently there are even some kernels that include a 104 * sequencer pseudo-device but exclude any midi device. How do they 105 * even link?? 106 */ 107 extern struct cfdriver midi_cd; 108 #ifdef _MODULE 109 extern struct cfdriver sequencer_cd; 110 #endif 111 112 #define ADDTIMEVAL(a, b) ( \ 113 (a)->tv_sec += (b)->tv_sec, \ 114 (a)->tv_usec += (b)->tv_usec, \ 115 (a)->tv_usec > 1000000 ? ((a)->tv_sec++, (a)->tv_usec -= 1000000) : 0\ 116 ) 117 118 #define SUBTIMEVAL(a, b) ( \ 119 (a)->tv_sec -= (b)->tv_sec, \ 120 (a)->tv_usec -= (b)->tv_usec, \ 121 (a)->tv_usec < 0 ? ((a)->tv_sec--, (a)->tv_usec += 1000000) : 0\ 122 ) 123 124 #ifdef AUDIO_DEBUG 125 #define DPRINTF(x) do { if (sequencerdebug) printf x; } while (0) 126 #define DPRINTFN(n,x) do { if (sequencerdebug >= (n)) printf x; } while (0) 127 int sequencerdebug = 0; 128 #else 129 #define DPRINTF(x) do { } while (0) 130 #define DPRINTFN(n,x) do { } while (0) 131 #endif 132 133 #define SEQ_NOTE_MAX 128 134 #define SEQ_NOTE_XXX 255 135 136 #define RECALC_USPERDIV(t) \ 137 ((t)->usperdiv = 60*1000000L/((t)->tempo_beatpermin*(t)->timebase_divperbeat)) 138 139 typedef union sequencer_pcqitem { 140 void *qi_ptr; 141 char qi_msg[4]; 142 } sequencer_pcqitem_t; 143 144 static void seq_reset(struct sequencer_softc *); 145 static int seq_do_command(struct sequencer_softc *, seq_event_t *); 146 static int seq_do_chnvoice(struct sequencer_softc *, seq_event_t *); 147 static int seq_do_chncommon(struct sequencer_softc *, seq_event_t *); 148 static void seq_timer_waitabs(struct sequencer_softc *, uint32_t); 149 static int seq_do_timing(struct sequencer_softc *, seq_event_t *); 150 static int seq_do_local(struct sequencer_softc *, seq_event_t *); 151 static int seq_do_sysex(struct sequencer_softc *, seq_event_t *); 152 static int seq_do_fullsize(struct sequencer_softc *, seq_event_t *, 153 struct uio *); 154 static int seq_input_event(struct sequencer_softc *, seq_event_t *); 155 static int seq_drain(struct sequencer_softc *); 156 static void seq_startoutput(struct sequencer_softc *); 157 static void seq_timeout(void *); 158 static int seq_to_new(seq_event_t *, struct uio *); 159 static void seq_softintr(void *); 160 161 static int midiseq_out(struct midi_dev *, u_char *, u_int, int); 162 static struct midi_dev *midiseq_open(int, int); 163 static void midiseq_close(struct midi_dev *); 164 static void midiseq_reset(struct midi_dev *); 165 static int midiseq_noteon(struct midi_dev *, int, int, seq_event_t *); 166 static int midiseq_noteoff(struct midi_dev *, int, int, seq_event_t *); 167 static int midiseq_keypressure(struct midi_dev *, int, int, seq_event_t *); 168 static int midiseq_pgmchange(struct midi_dev *, int, seq_event_t *); 169 static int midiseq_chnpressure(struct midi_dev *, int, seq_event_t *); 170 static int midiseq_ctlchange(struct midi_dev *, int, seq_event_t *); 171 static int midiseq_pitchbend(struct midi_dev *, int, seq_event_t *); 172 static int midiseq_loadpatch(struct midi_dev *, struct sysex_info *, 173 struct uio *); 174 void midiseq_in(struct midi_dev *, u_char *, int); 175 176 static dev_type_open(sequenceropen); 177 static dev_type_close(sequencerclose); 178 static dev_type_read(sequencerread); 179 static dev_type_write(sequencerwrite); 180 static dev_type_ioctl(sequencerioctl); 181 static dev_type_poll(sequencerpoll); 182 static dev_type_kqfilter(sequencerkqfilter); 183 184 const struct cdevsw sequencer_cdevsw = { 185 .d_open = sequenceropen, 186 .d_close = sequencerclose, 187 .d_read = sequencerread, 188 .d_write = sequencerwrite, 189 .d_ioctl = sequencerioctl, 190 .d_stop = nostop, 191 .d_tty = notty, 192 .d_poll = sequencerpoll, 193 .d_mmap = nommap, 194 .d_kqfilter = sequencerkqfilter, 195 .d_discard = nodiscard, 196 .d_flag = D_OTHER | D_MPSAFE 197 }; 198 static LIST_HEAD(, sequencer_softc) sequencers = 199 LIST_HEAD_INITIALIZER(sequencers); 200 static kmutex_t sequencer_lock; 201 202 static void 203 sequencerdestroy(struct sequencer_softc *sc) 204 { 205 206 callout_halt(&sc->sc_callout, &sc->lock); 207 callout_destroy(&sc->sc_callout); 208 softint_disestablish(sc->sih); 209 cv_destroy(&sc->rchan); 210 cv_destroy(&sc->wchan); 211 cv_destroy(&sc->lchan); 212 if (sc->pcq) 213 pcq_destroy(sc->pcq); 214 kmem_free(sc, sizeof(*sc)); 215 } 216 217 static struct sequencer_softc * 218 sequencercreate(int unit) 219 { 220 struct sequencer_softc *sc = kmem_zalloc(sizeof(*sc), KM_SLEEP); 221 222 sc->sc_unit = unit; 223 callout_init(&sc->sc_callout, CALLOUT_MPSAFE); 224 sc->sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 225 seq_softintr, sc); 226 mutex_init(&sc->lock, MUTEX_DEFAULT, IPL_NONE); 227 cv_init(&sc->rchan, "midiseqr"); 228 cv_init(&sc->wchan, "midiseqw"); 229 cv_init(&sc->lchan, "midiseql"); 230 sc->pcq = pcq_create(SEQ_MAXQ, KM_SLEEP); 231 if (sc->pcq == NULL) { 232 sequencerdestroy(sc); 233 return NULL; 234 } 235 return sc; 236 } 237 238 239 static struct sequencer_softc * 240 sequencerget(int unit) 241 { 242 struct sequencer_softc *sc; 243 244 KASSERTMSG(unit >= 0, "unit=%d", unit); 245 246 if (unit < 0) 247 return NULL; 248 249 mutex_enter(&sequencer_lock); 250 LIST_FOREACH(sc, &sequencers, sc_link) { 251 if (sc->sc_unit == unit) { 252 mutex_exit(&sequencer_lock); 253 return sc; 254 } 255 } 256 mutex_exit(&sequencer_lock); 257 258 /* 259 * XXXSMP -- nothing excludes another thread from creating the 260 * same unit here 261 */ 262 if ((sc = sequencercreate(unit)) == NULL) 263 return NULL; 264 265 mutex_enter(&sequencer_lock); 266 LIST_INSERT_HEAD(&sequencers, sc, sc_link); 267 mutex_exit(&sequencer_lock); 268 269 return sc; 270 } 271 272 #ifdef notyet 273 static void 274 sequencerput(struct sequencer_softc *sc) 275 { 276 277 mutex_enter(&sequencer_lock); 278 LIST_REMOVE(sc, sc_link); 279 mutex_exit(&sequencer_lock); 280 sequencerdestroy(sc); 281 } 282 #endif 283 284 void 285 sequencerattach(int n) 286 { 287 288 mutex_init(&sequencer_lock, MUTEX_DEFAULT, IPL_NONE); 289 } 290 291 /* 292 * Release reference to device acquired with sequencer_enter(). 293 */ 294 static void 295 sequencer_exit(struct sequencer_softc *sc) 296 { 297 298 sc->dvlock--; 299 cv_broadcast(&sc->lchan); 300 mutex_exit(&sc->lock); 301 } 302 303 /* 304 * Look up sequencer device and acquire locks for device access. 305 */ 306 static int 307 sequencer_enter(dev_t dev, struct sequencer_softc **scp) 308 { 309 struct sequencer_softc *sc; 310 311 /* First, find the device and take sc_lock. */ 312 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 313 return ENXIO; 314 315 mutex_enter(&sc->lock); 316 while (sc->dvlock) { 317 cv_wait(&sc->lchan, &sc->lock); 318 } 319 sc->dvlock++; 320 if (sc->dying) { 321 sequencer_exit(sc); 322 return EIO; 323 } 324 *scp = sc; 325 return 0; 326 } 327 328 static int 329 sequenceropen(dev_t dev, int flags, int ifmt, struct lwp *l) 330 { 331 struct sequencer_softc *sc; 332 struct midi_dev *md; 333 struct midi_softc *msc; 334 int error, unit, mdno; 335 336 DPRINTF(("sequenceropen\n")); 337 338 if ((error = sequencer_enter(dev, &sc)) != 0) 339 return error; 340 if (sc->isopen != 0) { 341 sequencer_exit(sc); 342 return EBUSY; 343 } 344 345 if (SEQ_IS_OLD(SEQUENCERUNIT(dev))) 346 sc->mode = SEQ_OLD; 347 else 348 sc->mode = SEQ_NEW; 349 sc->isopen++; 350 sc->flags = flags & (FREAD|FWRITE); 351 sc->pbus = 0; 352 sc->async = 0; 353 sc->input_stamp = ~0; 354 355 sc->nmidi = 0; 356 sc->ndevs = midi_unit_count(); 357 sc->timer.timebase_divperbeat = 100; 358 sc->timer.tempo_beatpermin = 60; 359 RECALC_USPERDIV(&sc->timer); 360 sc->timer.divs_lastevent = sc->timer.divs_lastchange = 0; 361 microtime(&sc->timer.reftime); 362 363 SEQ_QINIT(&sc->inq); 364 SEQ_QINIT(&sc->outq); 365 sc->lowat = SEQ_MAXQ / 2; 366 367 if (sc->ndevs > 0) { 368 mutex_exit(&sc->lock); 369 sc->devs = kmem_alloc(sc->ndevs * sizeof(struct midi_dev *), 370 KM_SLEEP); 371 for (unit = 0; unit < sc->ndevs; unit++) { 372 md = midiseq_open(unit, flags); 373 if (md) { 374 sc->devs[sc->nmidi++] = md; 375 md->seq = sc; 376 md->doingsysex = 0; 377 DPRINTF(("%s: midi unit %d opened as seq %p\n", 378 __func__, unit, md)); 379 } else { 380 DPRINTF(("%s: midi unit %d not opened as seq\n", 381 __func__, unit)); 382 } 383 } 384 mutex_enter(&sc->lock); 385 } else { 386 sc->devs = NULL; 387 } 388 389 /* Only now redirect input from MIDI devices. */ 390 for (mdno = 0; mdno < sc->nmidi; mdno++) { 391 msc = device_lookup_private(&midi_cd, sc->devs[mdno]->unit); 392 if (msc) { 393 mutex_enter(msc->lock); 394 msc->seqopen = 1; 395 mutex_exit(msc->lock); 396 } 397 } 398 399 seq_reset(sc); 400 sequencer_exit(sc); 401 402 DPRINTF(("%s: mode=%d, nmidi=%d\n", __func__, sc->mode, sc->nmidi)); 403 return 0; 404 } 405 406 static int 407 seq_drain(struct sequencer_softc *sc) 408 { 409 int error; 410 411 KASSERT(mutex_owned(&sc->lock)); 412 413 DPRINTFN(3, ("seq_drain: %p, len=%d\n", sc, SEQ_QLEN(&sc->outq))); 414 seq_startoutput(sc); 415 error = 0; 416 while (!SEQ_QEMPTY(&sc->outq) && !error) 417 error = cv_timedwait_sig(&sc->wchan, &sc->lock, 60*hz); 418 return error; 419 } 420 421 static void 422 seq_timeout(void *addr) 423 { 424 struct sequencer_softc *sc = addr; 425 proc_t *p; 426 pid_t pid; 427 428 DPRINTFN(4, ("seq_timeout: %p\n", sc)); 429 430 mutex_enter(&sc->lock); 431 if (sc->timeout == 0) { 432 mutex_exit(&sc->lock); 433 return; 434 } 435 sc->timeout = 0; 436 seq_startoutput(sc); 437 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 438 mutex_exit(&sc->lock); 439 return; 440 } 441 cv_broadcast(&sc->wchan); 442 selnotify(&sc->wsel, 0, NOTE_SUBMIT); 443 if ((pid = sc->async) != 0) { 444 mutex_enter(&proc_lock); 445 if ((p = proc_find(pid)) != NULL) 446 psignal(p, SIGIO); 447 mutex_exit(&proc_lock); 448 } 449 mutex_exit(&sc->lock); 450 } 451 452 static void 453 seq_startoutput(struct sequencer_softc *sc) 454 { 455 struct sequencer_queue *q = &sc->outq; 456 seq_event_t cmd; 457 458 KASSERT(mutex_owned(&sc->lock)); 459 460 if (sc->timeout) 461 return; 462 DPRINTFN(4, ("seq_startoutput: %p, len=%d\n", sc, SEQ_QLEN(q))); 463 while (!SEQ_QEMPTY(q) && !sc->timeout) { 464 SEQ_QGET(q, cmd); 465 seq_do_command(sc, &cmd); 466 } 467 } 468 469 static int 470 sequencerclose(dev_t dev, int flags, int ifmt, struct lwp *l) 471 { 472 struct sequencer_softc *sc; 473 struct midi_softc *msc; 474 int unit, error; 475 476 DPRINTF(("%s: %"PRIx64"\n", __func__, dev)); 477 478 if ((error = sequencer_enter(dev, &sc)) != 0) 479 return error; 480 seq_drain(sc); 481 if (sc->timeout) { 482 callout_halt(&sc->sc_callout, &sc->lock); 483 sc->timeout = 0; 484 } 485 /* Bin input from MIDI devices. */ 486 for (unit = 0; unit < sc->nmidi; unit++) { 487 msc = device_lookup_private(&midi_cd, unit); 488 if (msc) { 489 mutex_enter(msc->lock); 490 msc->seqopen = 0; 491 mutex_exit(msc->lock); 492 } 493 } 494 mutex_exit(&sc->lock); 495 496 for (unit = 0; unit < sc->nmidi; unit++) 497 if (sc->devs[unit] != NULL) 498 midiseq_close(sc->devs[unit]); 499 if (sc->devs != NULL) { 500 KASSERT(sc->ndevs > 0); 501 kmem_free(sc->devs, sc->ndevs * sizeof(struct midi_dev *)); 502 sc->devs = NULL; 503 } 504 505 mutex_enter(&sc->lock); 506 sc->isopen = 0; 507 sequencer_exit(sc); 508 509 DPRINTF(("%s: %"PRIx64" done\n", __func__, dev)); 510 511 return 0; 512 } 513 514 static int 515 seq_input_event(struct sequencer_softc *sc, seq_event_t *cmd) 516 { 517 struct sequencer_queue *q; 518 519 KASSERT(mutex_owned(&sc->lock)); 520 521 DPRINTFN(2, ("seq_input_event: %02x %02x %02x %02x %02x " 522 "%02x %02x %02x\n", cmd->tag, 523 cmd->unknown.byte[0], cmd->unknown.byte[1], 524 cmd->unknown.byte[2], cmd->unknown.byte[3], 525 cmd->unknown.byte[4], cmd->unknown.byte[5], 526 cmd->unknown.byte[6])); 527 q = &sc->inq; 528 if (SEQ_QFULL(q)) 529 return ENOMEM; 530 SEQ_QPUT(q, *cmd); 531 cv_broadcast(&sc->rchan); 532 selnotify(&sc->rsel, 0, NOTE_SUBMIT); 533 if (sc->async != 0) { 534 proc_t *p; 535 536 mutex_enter(&proc_lock); 537 if ((p = proc_find(sc->async)) != NULL) 538 psignal(p, SIGIO); 539 mutex_exit(&proc_lock); 540 } 541 return 0; 542 } 543 544 static void 545 seq_softintr(void *addr) 546 { 547 struct sequencer_softc *sc; 548 struct timeval now; 549 seq_event_t ev; 550 int status, chan, unit; 551 sequencer_pcqitem_t qi; 552 u_long t; 553 554 sc = addr; 555 556 mutex_enter(&sc->lock); 557 558 qi.qi_ptr = pcq_get(sc->pcq); 559 if (qi.qi_ptr == NULL) { 560 mutex_exit(&sc->lock); 561 return; 562 } 563 KASSERT((qi.qi_msg[3] & 0x80) != 0); 564 unit = qi.qi_msg[3] & ~0x80; 565 status = MIDI_GET_STATUS(qi.qi_msg[0]); 566 chan = MIDI_GET_CHAN(qi.qi_msg[0]); 567 switch (status) { 568 case MIDI_NOTEON: /* midi(4) always canonicalizes hidden note-off */ 569 ev = SEQ_MK_CHN(NOTEON, .device=unit, .channel=chan, 570 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 571 break; 572 case MIDI_NOTEOFF: 573 ev = SEQ_MK_CHN(NOTEOFF, .device=unit, .channel=chan, 574 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 575 break; 576 case MIDI_KEY_PRESSURE: 577 ev = SEQ_MK_CHN(KEY_PRESSURE, .device=unit, .channel=chan, 578 .key=qi.qi_msg[1], .pressure=qi.qi_msg[2]); 579 break; 580 case MIDI_CTL_CHANGE: /* XXX not correct for MSB */ 581 ev = SEQ_MK_CHN(CTL_CHANGE, .device=unit, .channel=chan, 582 .controller=qi.qi_msg[1], .value=qi.qi_msg[2]); 583 break; 584 case MIDI_PGM_CHANGE: 585 ev = SEQ_MK_CHN(PGM_CHANGE, .device=unit, .channel=chan, 586 .program=qi.qi_msg[1]); 587 break; 588 case MIDI_CHN_PRESSURE: 589 ev = SEQ_MK_CHN(CHN_PRESSURE, .device=unit, .channel=chan, 590 .pressure=qi.qi_msg[1]); 591 break; 592 case MIDI_PITCH_BEND: 593 ev = SEQ_MK_CHN(PITCH_BEND, .device=unit, .channel=chan, 594 .value=(qi.qi_msg[1] & 0x7f) | ((qi.qi_msg[2] & 0x7f) << 7)); 595 break; 596 default: /* this is now the point where MIDI_ACKs disappear */ 597 mutex_exit(&sc->lock); 598 return; 599 } 600 microtime(&now); 601 if (!sc->timer.running) 602 now = sc->timer.stoptime; 603 SUBTIMEVAL(&now, &sc->timer.reftime); 604 t = now.tv_sec * 1000000 + now.tv_usec; 605 t /= sc->timer.usperdiv; 606 t += sc->timer.divs_lastchange; 607 if (t != sc->input_stamp) { 608 seq_input_event(sc, &SEQ_MK_TIMING(WAIT_ABS, .divisions=t)); 609 sc->input_stamp = t; /* XXX what happens if timer is reset? */ 610 } 611 seq_input_event(sc, &ev); 612 mutex_exit(&sc->lock); 613 } 614 615 static int 616 sequencerread(dev_t dev, struct uio *uio, int ioflag) 617 { 618 struct sequencer_softc *sc; 619 struct sequencer_queue *q; 620 seq_event_t ev; 621 int error; 622 623 DPRINTFN(2, ("sequencerread: %"PRIx64", count=%d, ioflag=%x\n", 624 dev, (int)uio->uio_resid, ioflag)); 625 626 if ((error = sequencer_enter(dev, &sc)) != 0) 627 return error; 628 q = &sc->inq; 629 630 if (sc->mode == SEQ_OLD) { 631 sequencer_exit(sc); 632 DPRINTFN(-1,("sequencerread: old read\n")); 633 return EINVAL; /* XXX unimplemented */ 634 } 635 while (SEQ_QEMPTY(q)) { 636 if (ioflag & IO_NDELAY) { 637 error = EWOULDBLOCK; 638 break; 639 } 640 /* Drop lock to allow concurrent read/write. */ 641 KASSERT(sc->dvlock != 0); 642 sc->dvlock--; 643 error = cv_wait_sig(&sc->rchan, &sc->lock); 644 while (sc->dvlock != 0) { 645 cv_wait(&sc->lchan, &sc->lock); 646 } 647 sc->dvlock++; 648 if (error) { 649 break; 650 } 651 } 652 while (uio->uio_resid >= sizeof(ev) && !error && !SEQ_QEMPTY(q)) { 653 SEQ_QGET(q, ev); 654 mutex_exit(&sc->lock); 655 error = uiomove(&ev, sizeof(ev), uio); 656 mutex_enter(&sc->lock); 657 } 658 sequencer_exit(sc); 659 return error; 660 } 661 662 static int 663 sequencerwrite(dev_t dev, struct uio *uio, int ioflag) 664 { 665 struct sequencer_softc *sc; 666 struct sequencer_queue *q; 667 int error; 668 seq_event_t cmdbuf; 669 int size; 670 671 DPRINTFN(2, ("sequencerwrite: %"PRIx64", count=%d\n", dev, 672 (int)uio->uio_resid)); 673 674 if ((error = sequencer_enter(dev, &sc)) != 0) 675 return error; 676 q = &sc->outq; 677 678 size = sc->mode == SEQ_NEW ? sizeof cmdbuf : SEQOLD_CMDSIZE; 679 while (uio->uio_resid >= size && error == 0) { 680 mutex_exit(&sc->lock); 681 error = uiomove(&cmdbuf, size, uio); 682 if (error == 0) { 683 if (sc->mode == SEQ_OLD && seq_to_new(&cmdbuf, uio)) { 684 mutex_enter(&sc->lock); 685 continue; 686 } 687 if (cmdbuf.tag == SEQ_FULLSIZE) { 688 /* We do it like OSS does, asynchronously */ 689 error = seq_do_fullsize(sc, &cmdbuf, uio); 690 if (error == 0) { 691 mutex_enter(&sc->lock); 692 continue; 693 } 694 } 695 } 696 mutex_enter(&sc->lock); 697 if (error != 0) { 698 break; 699 } 700 while (SEQ_QFULL(q)) { 701 seq_startoutput(sc); 702 if (SEQ_QFULL(q)) { 703 if (ioflag & IO_NDELAY) { 704 error = EWOULDBLOCK; 705 break; 706 } 707 error = cv_wait_sig(&sc->wchan, &sc->lock); 708 if (error) { 709 break; 710 } 711 } 712 } 713 if (error == 0) { 714 SEQ_QPUT(q, cmdbuf); 715 } 716 } 717 if (error == 0) { 718 seq_startoutput(sc); 719 } else { 720 DPRINTFN(2, ("sequencerwrite: error=%d\n", error)); 721 } 722 sequencer_exit(sc); 723 return error; 724 } 725 726 static int 727 sequencerioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 728 { 729 struct sequencer_softc *sc; 730 struct synth_info *si; 731 struct midi_dev *md; 732 int devno, error, t; 733 struct timeval now; 734 u_long tx; 735 736 DPRINTFN(2, ("sequencerioctl: %"PRIx64" cmd=0x%08lx\n", dev, cmd)); 737 738 if ((error = sequencer_enter(dev, &sc)) != 0) 739 return error; 740 switch (cmd) { 741 case FIONBIO: 742 /* All handled in the upper FS layer. */ 743 break; 744 745 case FIOASYNC: 746 if (*(int *)addr) { 747 if (sc->async != 0) { 748 error = EBUSY; 749 break; 750 } 751 sc->async = curproc->p_pid; 752 DPRINTF(("%s: FIOASYNC %d\n", __func__, 753 sc->async)); 754 } else { 755 sc->async = 0; 756 } 757 break; 758 759 case SEQUENCER_RESET: 760 seq_reset(sc); 761 break; 762 763 case SEQUENCER_PANIC: 764 seq_reset(sc); 765 /* Do more? OSS doesn't */ 766 break; 767 768 case SEQUENCER_SYNC: 769 if (sc->flags != FREAD) 770 seq_drain(sc); 771 break; 772 773 case SEQUENCER_INFO: 774 si = (struct synth_info*)addr; 775 devno = si->device; 776 if (devno < 0 || devno >= sc->nmidi) { 777 error = EINVAL; 778 break; 779 } 780 md = sc->devs[devno]; 781 strncpy(si->name, md->name, sizeof si->name); 782 si->synth_type = SYNTH_TYPE_MIDI; 783 si->synth_subtype = md->subtype; 784 si->nr_voices = md->nr_voices; 785 si->instr_bank_size = md->instr_bank_size; 786 si->capabilities = md->capabilities; 787 break; 788 789 case SEQUENCER_NRSYNTHS: 790 *(int *)addr = sc->nmidi; 791 break; 792 793 case SEQUENCER_NRMIDIS: 794 *(int *)addr = sc->nmidi; 795 break; 796 797 case SEQUENCER_OUTOFBAND: 798 DPRINTFN(3, ("sequencer_ioctl: OOB=%02x %02x %02x %02x %02x %02x %02x %02x\n", 799 *(u_char *)addr, *((u_char *)addr+1), 800 *((u_char *)addr+2), *((u_char *)addr+3), 801 *((u_char *)addr+4), *((u_char *)addr+5), 802 *((u_char *)addr+6), *((u_char *)addr+7))); 803 if ((sc->flags & FWRITE) == 0) { 804 error = EBADF; 805 } else { 806 error = seq_do_command(sc, (seq_event_t *)addr); 807 } 808 break; 809 810 case SEQUENCER_TMR_TIMEBASE: 811 t = *(int *)addr; 812 if (t < 1) 813 t = 1; 814 if (t > 10000) 815 t = 10000; 816 *(int *)addr = t; 817 sc->timer.timebase_divperbeat = t; 818 sc->timer.divs_lastchange = sc->timer.divs_lastevent; 819 microtime(&sc->timer.reftime); 820 RECALC_USPERDIV(&sc->timer); 821 break; 822 823 case SEQUENCER_TMR_START: 824 error = seq_do_timing(sc, &SEQ_MK_TIMING(START)); 825 break; 826 827 case SEQUENCER_TMR_STOP: 828 error = seq_do_timing(sc, &SEQ_MK_TIMING(STOP)); 829 break; 830 831 case SEQUENCER_TMR_CONTINUE: 832 error = seq_do_timing(sc, &SEQ_MK_TIMING(CONTINUE)); 833 break; 834 835 case SEQUENCER_TMR_TEMPO: 836 error = seq_do_timing(sc, 837 &SEQ_MK_TIMING(TEMPO, .bpm=*(int *)addr)); 838 RECALC_USPERDIV(&sc->timer); 839 if (error == 0) 840 *(int *)addr = sc->timer.tempo_beatpermin; 841 break; 842 843 case SEQUENCER_TMR_SOURCE: 844 *(int *)addr = SEQUENCER_TMR_INTERNAL; 845 break; 846 847 case SEQUENCER_TMR_METRONOME: 848 /* noop */ 849 break; 850 851 case SEQUENCER_THRESHOLD: 852 t = SEQ_MAXQ - *(int *)addr / sizeof (seq_event_rec); 853 if (t < 1) 854 t = 1; 855 if (t > SEQ_MAXQ) 856 t = SEQ_MAXQ; 857 sc->lowat = t; 858 break; 859 860 case SEQUENCER_CTRLRATE: 861 *(int *)addr = (sc->timer.tempo_beatpermin 862 *sc->timer.timebase_divperbeat + 30) / 60; 863 break; 864 865 case SEQUENCER_GETTIME: 866 microtime(&now); 867 SUBTIMEVAL(&now, &sc->timer.reftime); 868 tx = now.tv_sec * 1000000 + now.tv_usec; 869 tx /= sc->timer.usperdiv; 870 tx += sc->timer.divs_lastchange; 871 *(int *)addr = tx; 872 break; 873 874 default: 875 DPRINTFN(-1,("sequencer_ioctl: unimpl %08lx\n", cmd)); 876 error = EINVAL; 877 break; 878 } 879 sequencer_exit(sc); 880 881 return error; 882 } 883 884 static int 885 sequencerpoll(dev_t dev, int events, struct lwp *l) 886 { 887 struct sequencer_softc *sc; 888 int revents = 0; 889 890 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 891 return ENXIO; 892 893 DPRINTF(("%s: %p events=0x%x\n", __func__, sc, events)); 894 895 mutex_enter(&sc->lock); 896 if (events & (POLLIN | POLLRDNORM)) 897 if ((sc->flags&FREAD) && !SEQ_QEMPTY(&sc->inq)) 898 revents |= events & (POLLIN | POLLRDNORM); 899 900 if (events & (POLLOUT | POLLWRNORM)) 901 if ((sc->flags&FWRITE) && SEQ_QLEN(&sc->outq) < sc->lowat) 902 revents |= events & (POLLOUT | POLLWRNORM); 903 904 if (revents == 0) { 905 if ((sc->flags&FREAD) && (events & (POLLIN | POLLRDNORM))) 906 selrecord(l, &sc->rsel); 907 908 if ((sc->flags&FWRITE) && (events & (POLLOUT | POLLWRNORM))) 909 selrecord(l, &sc->wsel); 910 } 911 mutex_exit(&sc->lock); 912 913 return revents; 914 } 915 916 static void 917 filt_sequencerrdetach(struct knote *kn) 918 { 919 struct sequencer_softc *sc = kn->kn_hook; 920 921 mutex_enter(&sc->lock); 922 selremove_knote(&sc->rsel, kn); 923 mutex_exit(&sc->lock); 924 } 925 926 static int 927 filt_sequencerread(struct knote *kn, long hint) 928 { 929 struct sequencer_softc *sc = kn->kn_hook; 930 int rv; 931 932 if (hint != NOTE_SUBMIT) { 933 mutex_enter(&sc->lock); 934 } 935 if (SEQ_QEMPTY(&sc->inq)) { 936 rv = 0; 937 } else { 938 kn->kn_data = sizeof(seq_event_rec); 939 rv = 1; 940 } 941 if (hint != NOTE_SUBMIT) { 942 mutex_exit(&sc->lock); 943 } 944 return rv; 945 } 946 947 static const struct filterops sequencerread_filtops = { 948 .f_flags = FILTEROP_ISFD, 949 .f_attach = NULL, 950 .f_detach = filt_sequencerrdetach, 951 .f_event = filt_sequencerread, 952 }; 953 954 static void 955 filt_sequencerwdetach(struct knote *kn) 956 { 957 struct sequencer_softc *sc = kn->kn_hook; 958 959 mutex_enter(&sc->lock); 960 selremove_knote(&sc->wsel, kn); 961 mutex_exit(&sc->lock); 962 } 963 964 static int 965 filt_sequencerwrite(struct knote *kn, long hint) 966 { 967 struct sequencer_softc *sc = kn->kn_hook; 968 int rv; 969 970 if (hint != NOTE_SUBMIT) { 971 mutex_enter(&sc->lock); 972 } 973 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 974 rv = 0; 975 } else { 976 kn->kn_data = sizeof(seq_event_rec); 977 rv = 1; 978 } 979 if (hint != NOTE_SUBMIT) { 980 mutex_exit(&sc->lock); 981 } 982 return rv; 983 } 984 985 static const struct filterops sequencerwrite_filtops = { 986 .f_flags = FILTEROP_ISFD, 987 .f_attach = NULL, 988 .f_detach = filt_sequencerwdetach, 989 .f_event = filt_sequencerwrite, 990 }; 991 992 static int 993 sequencerkqfilter(dev_t dev, struct knote *kn) 994 { 995 struct sequencer_softc *sc; 996 struct selinfo *sip; 997 998 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 999 return ENXIO; 1000 1001 switch (kn->kn_filter) { 1002 case EVFILT_READ: 1003 sip = &sc->rsel; 1004 kn->kn_fop = &sequencerread_filtops; 1005 break; 1006 1007 case EVFILT_WRITE: 1008 sip = &sc->wsel; 1009 kn->kn_fop = &sequencerwrite_filtops; 1010 break; 1011 1012 default: 1013 return EINVAL; 1014 } 1015 1016 kn->kn_hook = sc; 1017 1018 mutex_enter(&sc->lock); 1019 selrecord_knote(sip, kn); 1020 mutex_exit(&sc->lock); 1021 1022 return 0; 1023 } 1024 1025 static void 1026 seq_reset(struct sequencer_softc *sc) 1027 { 1028 int i, chn; 1029 struct midi_dev *md; 1030 1031 KASSERT(mutex_owned(&sc->lock)); 1032 1033 if (!(sc->flags & FWRITE)) 1034 return; 1035 for (i = 0; i < sc->nmidi; i++) { 1036 md = sc->devs[i]; 1037 midiseq_reset(md); 1038 for (chn = 0; chn < MAXCHAN; chn++) { 1039 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 1040 .controller=MIDI_CTRL_NOTES_OFF)); 1041 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 1042 .controller=MIDI_CTRL_RESET)); 1043 midiseq_pitchbend(md, chn, &SEQ_MK_CHN(PITCH_BEND, 1044 .value=MIDI_BEND_NEUTRAL)); 1045 } 1046 } 1047 } 1048 1049 static int 1050 seq_do_command(struct sequencer_softc *sc, seq_event_t *b) 1051 { 1052 int dev; 1053 1054 KASSERT(mutex_owned(&sc->lock)); 1055 1056 DPRINTFN(4, ("seq_do_command: %p cmd=0x%02x\n", sc, b->timing.op)); 1057 1058 switch(b->tag) { 1059 case SEQ_LOCAL: 1060 return seq_do_local(sc, b); 1061 case SEQ_TIMING: 1062 return seq_do_timing(sc, b); 1063 case SEQ_CHN_VOICE: 1064 return seq_do_chnvoice(sc, b); 1065 case SEQ_CHN_COMMON: 1066 return seq_do_chncommon(sc, b); 1067 case SEQ_SYSEX: 1068 return seq_do_sysex(sc, b); 1069 /* COMPAT */ 1070 case SEQOLD_MIDIPUTC: 1071 dev = b->putc.device; 1072 if (dev < 0 || dev >= sc->nmidi) 1073 return ENXIO; 1074 return midiseq_out(sc->devs[dev], &b->putc.byte, 1, 0); 1075 default: 1076 DPRINTFN(-1,("seq_do_command: unimpl command %02x\n", b->tag)); 1077 return EINVAL; 1078 } 1079 } 1080 1081 static int 1082 seq_do_chnvoice(struct sequencer_softc *sc, seq_event_t *b) 1083 { 1084 int dev; 1085 int error; 1086 struct midi_dev *md; 1087 1088 KASSERT(mutex_owned(&sc->lock)); 1089 1090 dev = b->voice.device; 1091 if (dev < 0 || dev >= sc->nmidi || 1092 b->voice.channel > 15 || 1093 b->voice.key >= SEQ_NOTE_MAX) 1094 return ENXIO; 1095 md = sc->devs[dev]; 1096 switch(b->voice.op) { 1097 case MIDI_NOTEON: /* no need to special-case hidden noteoff here */ 1098 error = midiseq_noteon(md, b->voice.channel, b->voice.key, b); 1099 break; 1100 case MIDI_NOTEOFF: 1101 error = midiseq_noteoff(md, b->voice.channel, b->voice.key, b); 1102 break; 1103 case MIDI_KEY_PRESSURE: 1104 error = midiseq_keypressure(md, 1105 b->voice.channel, b->voice.key, b); 1106 break; 1107 default: 1108 DPRINTFN(-1,("seq_do_chnvoice: unimpl command %02x\n", 1109 b->voice.op)); 1110 error = EINVAL; 1111 break; 1112 } 1113 return error; 1114 } 1115 1116 static int 1117 seq_do_chncommon(struct sequencer_softc *sc, seq_event_t *b) 1118 { 1119 int dev; 1120 int error; 1121 struct midi_dev *md; 1122 1123 KASSERT(mutex_owned(&sc->lock)); 1124 1125 dev = b->common.device; 1126 if (dev < 0 || dev >= sc->nmidi || 1127 b->common.channel > 15) 1128 return ENXIO; 1129 md = sc->devs[dev]; 1130 DPRINTFN(2,("seq_do_chncommon: %02x\n", b->common.op)); 1131 1132 error = 0; 1133 switch(b->common.op) { 1134 case MIDI_PGM_CHANGE: 1135 error = midiseq_pgmchange(md, b->common.channel, b); 1136 break; 1137 case MIDI_CTL_CHANGE: 1138 error = midiseq_ctlchange(md, b->common.channel, b); 1139 break; 1140 case MIDI_PITCH_BEND: 1141 error = midiseq_pitchbend(md, b->common.channel, b); 1142 break; 1143 case MIDI_CHN_PRESSURE: 1144 error = midiseq_chnpressure(md, b->common.channel, b); 1145 break; 1146 default: 1147 DPRINTFN(-1,("seq_do_chncommon: unimpl command %02x\n", 1148 b->common.op)); 1149 error = EINVAL; 1150 break; 1151 } 1152 return error; 1153 } 1154 1155 static int 1156 seq_do_local(struct sequencer_softc *sc, seq_event_t *b) 1157 { 1158 1159 KASSERT(mutex_owned(&sc->lock)); 1160 1161 return EINVAL; 1162 } 1163 1164 static int 1165 seq_do_sysex(struct sequencer_softc *sc, seq_event_t *b) 1166 { 1167 int dev, i; 1168 struct midi_dev *md; 1169 uint8_t *bf = b->sysex.buffer; 1170 1171 KASSERT(mutex_owned(&sc->lock)); 1172 1173 dev = b->sysex.device; 1174 if (dev < 0 || dev >= sc->nmidi) 1175 return ENXIO; 1176 DPRINTF(("%s: dev=%d\n", __func__, dev)); 1177 md = sc->devs[dev]; 1178 1179 if (!md->doingsysex) { 1180 midiseq_out(md, (uint8_t[]){MIDI_SYSEX_START}, 1, 0); 1181 md->doingsysex = 1; 1182 } 1183 1184 for (i = 0; i < 6 && bf[i] != 0xff; i++) 1185 ; 1186 midiseq_out(md, bf, i, 0); 1187 if (i < 6 || (i > 0 && bf[i-1] == MIDI_SYSEX_END)) 1188 md->doingsysex = 0; 1189 return 0; 1190 } 1191 1192 static void 1193 seq_timer_waitabs(struct sequencer_softc *sc, uint32_t divs) 1194 { 1195 struct timeval when; 1196 long long usec; 1197 struct syn_timer *t; 1198 int ticks; 1199 1200 KASSERT(mutex_owned(&sc->lock)); 1201 1202 t = &sc->timer; 1203 t->divs_lastevent = divs; 1204 divs -= t->divs_lastchange; 1205 usec = (long long)divs * (long long)t->usperdiv; /* convert to usec */ 1206 when.tv_sec = usec / 1000000; 1207 when.tv_usec = usec % 1000000; 1208 DPRINTFN(4, ("seq_timer_waitabs: adjdivs=%d, sleep when=%"PRId64".%06"PRId64, 1209 divs, when.tv_sec, (uint64_t)when.tv_usec)); 1210 ADDTIMEVAL(&when, &t->reftime); /* abstime for end */ 1211 ticks = tvhzto(&when); 1212 DPRINTFN(4, (" when+start=%"PRId64".%06"PRId64", tick=%d\n", 1213 when.tv_sec, (uint64_t)when.tv_usec, ticks)); 1214 if (ticks > 0) { 1215 #ifdef DIAGNOSTIC 1216 if (ticks > 20 * hz) { 1217 /* Waiting more than 20s */ 1218 printf("seq_timer_waitabs: funny ticks=%d, " 1219 "usec=%lld\n", ticks, usec); 1220 } 1221 #endif 1222 sc->timeout = 1; 1223 callout_reset(&sc->sc_callout, ticks, 1224 seq_timeout, sc); 1225 } 1226 #ifdef SEQUENCER_DEBUG 1227 else if (tick < 0) 1228 DPRINTF(("%s: ticks = %d\n", __func__, ticks)); 1229 #endif 1230 } 1231 1232 static int 1233 seq_do_timing(struct sequencer_softc *sc, seq_event_t *b) 1234 { 1235 struct syn_timer *t = &sc->timer; 1236 struct timeval when; 1237 int error; 1238 1239 KASSERT(mutex_owned(&sc->lock)); 1240 1241 error = 0; 1242 switch(b->timing.op) { 1243 case TMR_WAIT_REL: 1244 seq_timer_waitabs(sc, 1245 b->t_WAIT_REL.divisions + t->divs_lastevent); 1246 break; 1247 case TMR_WAIT_ABS: 1248 seq_timer_waitabs(sc, b->t_WAIT_ABS.divisions); 1249 break; 1250 case TMR_START: 1251 microtime(&t->reftime); 1252 t->divs_lastevent = t->divs_lastchange = 0; 1253 t->running = 1; 1254 break; 1255 case TMR_STOP: 1256 microtime(&t->stoptime); 1257 t->running = 0; 1258 break; 1259 case TMR_CONTINUE: 1260 if (t->running) 1261 break; 1262 microtime(&when); 1263 SUBTIMEVAL(&when, &t->stoptime); 1264 ADDTIMEVAL(&t->reftime, &when); 1265 t->running = 1; 1266 break; 1267 case TMR_TEMPO: 1268 /* bpm is unambiguously MIDI clocks per minute / 24 */ 1269 /* (24 MIDI clocks are usually but not always a quarter note) */ 1270 if (b->t_TEMPO.bpm < 8) /* where are these limits specified? */ 1271 t->tempo_beatpermin = 8; 1272 else if (b->t_TEMPO.bpm > 360) /* ? */ 1273 t->tempo_beatpermin = 360; 1274 else 1275 t->tempo_beatpermin = b->t_TEMPO.bpm; 1276 t->divs_lastchange = t->divs_lastevent; 1277 microtime(&t->reftime); 1278 RECALC_USPERDIV(t); 1279 break; 1280 case TMR_ECHO: 1281 error = seq_input_event(sc, b); 1282 break; 1283 case TMR_RESET: 1284 t->divs_lastevent = t->divs_lastchange = 0; 1285 microtime(&t->reftime); 1286 break; 1287 case TMR_SPP: 1288 case TMR_TIMESIG: 1289 DPRINTF(("%s: unimplemented %02x\n", __func__, b->timing.op)); 1290 error = EINVAL; /* not quite accurate... */ 1291 break; 1292 default: 1293 DPRINTF(("%s: unknown %02x\n", __func__, b->timing.op)); 1294 error = EINVAL; 1295 break; 1296 } 1297 return error; 1298 } 1299 1300 static int 1301 seq_do_fullsize(struct sequencer_softc *sc, seq_event_t *b, struct uio *uio) 1302 { 1303 struct sysex_info sysex; 1304 u_int dev; 1305 1306 CTASSERT(sizeof(seq_event_rec) == SEQ_SYSEX_HDRSIZE); 1307 memcpy(&sysex, b, sizeof(*b)); 1308 dev = sysex.device_no; 1309 if (/* dev < 0 || */ dev >= sc->nmidi) 1310 return ENXIO; 1311 DPRINTFN(2, ("seq_do_fullsize: fmt=%04x, dev=%d, len=%d\n", 1312 sysex.key, dev, sysex.len)); 1313 return midiseq_loadpatch(sc->devs[dev], &sysex, uio); 1314 } 1315 1316 /* 1317 * Convert an old sequencer event to a new one. 1318 * NOTE: on entry, *ev may contain valid data only in the first 4 bytes. 1319 * That may be true even on exit (!) in the case of SEQOLD_MIDIPUTC; the 1320 * caller will only look at the first bytes in that case anyway. Ugly? Sure. 1321 */ 1322 static int 1323 seq_to_new(seq_event_t *ev, struct uio *uio) 1324 { 1325 int cmd, chan, note, parm; 1326 uint32_t tmp_delay; 1327 int error; 1328 uint8_t *bfp; 1329 1330 cmd = ev->tag; 1331 bfp = ev->unknown.byte; 1332 chan = *bfp++; 1333 note = *bfp++; 1334 parm = *bfp++; 1335 DPRINTFN(3, ("seq_to_new: 0x%02x %d %d %d\n", cmd, chan, note, parm)); 1336 1337 if (cmd >= 0x80) { 1338 /* Fill the event record */ 1339 if (uio->uio_resid >= sizeof *ev - SEQOLD_CMDSIZE) { 1340 error = uiomove(bfp, sizeof *ev - SEQOLD_CMDSIZE, uio); 1341 if (error) 1342 return error; 1343 } else 1344 return EINVAL; 1345 } 1346 1347 switch(cmd) { 1348 case SEQOLD_NOTEOFF: 1349 /* 1350 * What's with the SEQ_NOTE_XXX? In OSS this seems to have 1351 * been undocumented magic for messing with the overall volume 1352 * of a 'voice', equated precariously with 'channel' and 1353 * pretty much unimplementable except by directly frobbing a 1354 * synth chip. For us, who treat everything as interfaced over 1355 * MIDI, this will just be unceremoniously discarded as 1356 * invalid in midiseq_noteoff, making the whole event an 1357 * elaborate no-op, and that doesn't seem to be any different 1358 * from what happens on linux with a MIDI-interfaced device, 1359 * by the way. The moral is ... use the new /dev/music API, ok? 1360 */ 1361 *ev = SEQ_MK_CHN(NOTEOFF, .device=0, .channel=chan, 1362 .key=SEQ_NOTE_XXX, .velocity=parm); 1363 break; 1364 case SEQOLD_NOTEON: 1365 *ev = SEQ_MK_CHN(NOTEON, 1366 .device=0, .channel=chan, .key=note, .velocity=parm); 1367 break; 1368 case SEQOLD_WAIT: 1369 /* 1370 * This event cannot even /exist/ on non-littleendian machines, 1371 * and so help me, that's exactly the way OSS defined it. 1372 * Also, the OSS programmer's guide states (p. 74, v1.11) 1373 * that seqold time units are system clock ticks, unlike 1374 * the new 'divisions' which are determined by timebase. In 1375 * that case we would need to do scaling here - but no such 1376 * behavior is visible in linux either--which also treats this 1377 * value, surprisingly, as an absolute, not relative, time. 1378 * My guess is that this event has gone unused so long that 1379 * nobody could agree we got it wrong no matter what we do. 1380 */ 1381 tmp_delay = *(uint32_t *)ev >> 8; 1382 *ev = SEQ_MK_TIMING(WAIT_ABS, .divisions=tmp_delay); 1383 break; 1384 case SEQOLD_SYNCTIMER: 1385 /* 1386 * The TMR_RESET event is not defined in any OSS materials 1387 * I can find; it may have been invented here just to provide 1388 * an accurate _to_new translation of this event. 1389 */ 1390 *ev = SEQ_MK_TIMING(RESET); 1391 break; 1392 case SEQOLD_PGMCHANGE: 1393 *ev = SEQ_MK_CHN(PGM_CHANGE, 1394 .device=0, .channel=chan, .program=note); 1395 break; 1396 case SEQOLD_MIDIPUTC: 1397 break; /* interpret in normal mode */ 1398 case SEQOLD_ECHO: 1399 case SEQOLD_PRIVATE: 1400 case SEQOLD_EXTENDED: 1401 default: 1402 DPRINTF(("%s: not impl 0x%02x\n", __func__, cmd)); 1403 return EINVAL; 1404 /* In case new-style events show up */ 1405 case SEQ_TIMING: 1406 case SEQ_CHN_VOICE: 1407 case SEQ_CHN_COMMON: 1408 case SEQ_FULLSIZE: 1409 break; 1410 } 1411 return 0; 1412 } 1413 1414 /**********************************************/ 1415 1416 void 1417 midiseq_in(struct midi_dev *md, u_char *msg, int len) 1418 { 1419 struct sequencer_softc *sc; 1420 sequencer_pcqitem_t qi; 1421 1422 DPRINTFN(2, ("midiseq_in: %p %02x %02x %02x\n", 1423 md, msg[0], msg[1], msg[2])); 1424 1425 sc = md->seq; 1426 1427 qi.qi_msg[0] = msg[0]; 1428 qi.qi_msg[1] = msg[1]; 1429 qi.qi_msg[2] = msg[2]; 1430 qi.qi_msg[3] = md->unit | 0x80; /* ensure non-zero value of qi_ptr */ 1431 pcq_put(sc->pcq, qi.qi_ptr); 1432 softint_schedule(sc->sih); 1433 } 1434 1435 static struct midi_dev * 1436 midiseq_open(int unit, int flags) 1437 { 1438 int error; 1439 struct midi_dev *md; 1440 struct midi_softc *sc; 1441 struct midi_info mi; 1442 int major; 1443 dev_t dev; 1444 vnode_t *vp; 1445 int oflags; 1446 1447 major = devsw_name2chr("midi", NULL, 0); 1448 dev = makedev(major, unit); 1449 1450 DPRINTFN(2, ("midiseq_open: %d %d\n", unit, flags)); 1451 1452 error = cdevvp(dev, &vp); 1453 if (error) 1454 return NULL; 1455 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1456 error = VOP_OPEN(vp, flags, kauth_cred_get()); 1457 VOP_UNLOCK(vp); 1458 if (error) { 1459 vrele(vp); 1460 return NULL; 1461 } 1462 1463 /* Only after we have acquired reference via VOP_OPEN(). */ 1464 midi_getinfo(dev, &mi); 1465 oflags = flags; 1466 if ((mi.props & MIDI_PROP_CAN_INPUT) == 0) 1467 flags &= ~FREAD; 1468 if ((flags & (FREAD|FWRITE)) == 0) { 1469 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1470 VOP_CLOSE(vp, oflags, kauth_cred_get()); 1471 VOP_UNLOCK(vp); 1472 vrele(vp); 1473 return NULL; 1474 } 1475 1476 sc = device_lookup_private(&midi_cd, unit); 1477 md = kmem_zalloc(sizeof(*md), KM_SLEEP); 1478 md->unit = unit; 1479 md->name = mi.name; 1480 md->subtype = 0; 1481 md->nr_voices = 128; /* XXX */ 1482 md->instr_bank_size = 128; /* XXX */ 1483 md->vp = vp; 1484 if (mi.props & MIDI_PROP_CAN_INPUT) 1485 md->capabilities |= SYNTH_CAP_INPUT; 1486 sc->seq_md = md; 1487 return md; 1488 } 1489 1490 static void 1491 midiseq_close(struct midi_dev *md) 1492 { 1493 1494 DPRINTFN(2, ("midiseq_close: %d\n", md->unit)); 1495 (void)vn_close(md->vp, 0, kauth_cred_get()); 1496 kmem_free(md, sizeof(*md)); 1497 } 1498 1499 static void 1500 midiseq_reset(struct midi_dev *md) 1501 { 1502 /* XXX send GM reset? */ 1503 DPRINTFN(3, ("midiseq_reset: %d\n", md->unit)); 1504 } 1505 1506 static int 1507 midiseq_out(struct midi_dev *md, u_char *bf, u_int cc, int chk) 1508 { 1509 DPRINTFN(5, ("midiseq_out: md=%p, unit=%d, bf[0]=0x%02x, cc=%d\n", 1510 md, md->unit, bf[0], cc)); 1511 1512 /* midi(4) does running status compression where appropriate. */ 1513 return midi_writebytes(md->unit, bf, cc); 1514 } 1515 1516 /* 1517 * If the writing process hands us a hidden note-off in a note-on event, 1518 * we will simply write it that way; no need to special case it here, 1519 * as midi(4) will always canonicalize or compress as appropriate anyway. 1520 */ 1521 static int 1522 midiseq_noteon(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1523 { 1524 1525 return midiseq_out(md, (uint8_t[]){ 1526 MIDI_NOTEON | chan, key, ev->c_NOTEON.velocity & 0x7f}, 3, 1); 1527 } 1528 1529 static int 1530 midiseq_noteoff(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1531 { 1532 1533 return midiseq_out(md, (uint8_t[]){ 1534 MIDI_NOTEOFF | chan, key, ev->c_NOTEOFF.velocity & 0x7f}, 3, 1); 1535 } 1536 1537 static int 1538 midiseq_keypressure(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1539 { 1540 1541 return midiseq_out(md, (uint8_t[]){ 1542 MIDI_KEY_PRESSURE | chan, key, 1543 ev->c_KEY_PRESSURE.pressure & 0x7f}, 3, 1); 1544 } 1545 1546 static int 1547 midiseq_pgmchange(struct midi_dev *md, int chan, seq_event_t *ev) 1548 { 1549 1550 if (ev->c_PGM_CHANGE.program > 127) 1551 return EINVAL; 1552 return midiseq_out(md, (uint8_t[]){ 1553 MIDI_PGM_CHANGE | chan, ev->c_PGM_CHANGE.program}, 2, 1); 1554 } 1555 1556 static int 1557 midiseq_chnpressure(struct midi_dev *md, int chan, seq_event_t *ev) 1558 { 1559 1560 if (ev->c_CHN_PRESSURE.pressure > 127) 1561 return EINVAL; 1562 return midiseq_out(md, (uint8_t[]){ 1563 MIDI_CHN_PRESSURE | chan, ev->c_CHN_PRESSURE.pressure}, 2, 1); 1564 } 1565 1566 static int 1567 midiseq_ctlchange(struct midi_dev *md, int chan, seq_event_t *ev) 1568 { 1569 1570 if (ev->c_CTL_CHANGE.controller > 127) 1571 return EINVAL; 1572 return midiseq_out( md, (uint8_t[]){ 1573 MIDI_CTL_CHANGE | chan, ev->c_CTL_CHANGE.controller, 1574 ev->c_CTL_CHANGE.value & 0x7f /* XXX this is SO wrong */ 1575 }, 3, 1); 1576 } 1577 1578 static int 1579 midiseq_pitchbend(struct midi_dev *md, int chan, seq_event_t *ev) 1580 { 1581 1582 return midiseq_out(md, (uint8_t[]){ 1583 MIDI_PITCH_BEND | chan, 1584 ev->c_PITCH_BEND.value & 0x7f, 1585 (ev->c_PITCH_BEND.value >> 7) & 0x7f}, 3, 1); 1586 } 1587 1588 static int 1589 midiseq_loadpatch(struct midi_dev *md, 1590 struct sysex_info *sysex, struct uio *uio) 1591 { 1592 struct sequencer_softc *sc; 1593 u_char c, bf[128]; 1594 int i, cc, error; 1595 1596 if (sysex->key != SEQ_SYSEX_PATCH) { 1597 DPRINTFN(-1,("midiseq_loadpatch: bad patch key 0x%04x\n", 1598 sysex->key)); 1599 return EINVAL; 1600 } 1601 if (uio->uio_resid < sysex->len) 1602 /* adjust length, should be an error */ 1603 sysex->len = uio->uio_resid; 1604 1605 DPRINTFN(2, ("midiseq_loadpatch: len=%d\n", sysex->len)); 1606 if (sysex->len == 0) 1607 return EINVAL; 1608 error = uiomove(&c, 1, uio); 1609 if (error) 1610 return error; 1611 if (c != MIDI_SYSEX_START) /* must start like this */ 1612 return EINVAL; 1613 sc = md->seq; 1614 mutex_enter(&sc->lock); 1615 error = midiseq_out(md, &c, 1, 0); 1616 mutex_exit(&sc->lock); 1617 if (error) 1618 return error; 1619 --sysex->len; 1620 while (sysex->len > 0) { 1621 cc = sysex->len; 1622 if (cc > sizeof bf) 1623 cc = sizeof bf; 1624 error = uiomove(bf, cc, uio); 1625 if (error) 1626 break; 1627 for(i = 0; i < cc && !MIDI_IS_STATUS(bf[i]); i++) 1628 ; 1629 /* 1630 * XXX midi(4)'s buffer might not accommodate this, and the 1631 * function will not block us (though in this case we have 1632 * a process and could in principle block). 1633 */ 1634 mutex_enter(&sc->lock); 1635 error = midiseq_out(md, bf, i, 0); 1636 mutex_exit(&sc->lock); 1637 if (error) 1638 break; 1639 sysex->len -= i; 1640 if (i != cc) 1641 break; 1642 } 1643 /* 1644 * Any leftover data in uio is rubbish; 1645 * the SYSEX should be one write ending in SYSEX_END. 1646 */ 1647 uio->uio_resid = 0; 1648 c = MIDI_SYSEX_END; 1649 mutex_enter(&sc->lock); 1650 error = midiseq_out(md, &c, 1, 0); 1651 mutex_exit(&sc->lock); 1652 return error; 1653 } 1654 1655 #if NMIDI == 0 1656 static dev_type_open(midiopen); 1657 static dev_type_close(midiclose); 1658 1659 /* 1660 * If someone has a sequencer, but no midi devices there will 1661 * be unresolved references, so we provide little stubs. 1662 */ 1663 1664 int 1665 midi_unit_count(void) 1666 { 1667 return 0; 1668 } 1669 1670 static int 1671 midiopen(dev_t dev, int flags, int ifmt, struct lwp *l) 1672 { 1673 return ENXIO; 1674 } 1675 1676 void 1677 midi_getinfo(dev_t dev, struct midi_info *mi) 1678 { 1679 mi->name = "Dummy MIDI device"; 1680 mi->props = 0; 1681 } 1682 1683 static int 1684 midiclose(dev_t dev, int flags, int ifmt, struct lwp *l) 1685 { 1686 return ENXIO; 1687 } 1688 1689 int 1690 midi_writebytes(int unit, u_char *bf, int cc) 1691 { 1692 return ENXIO; 1693 } 1694 #endif /* NMIDI == 0 */ 1695
Indexes created Sat Sep 20 22:09:52 GMT 2025