1 /* $NetBSD: sequencer.c,v 1.55 2012/04/09 10:18:16 plunky 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 1.55 2012/04/09 10:18:16 plunky 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 struct sequencer_softc seqdevs[NSEQUENCER]; 121 122 void sequencerattach(int); 123 static void seq_reset(struct sequencer_softc *); 124 static int seq_do_command(struct sequencer_softc *, seq_event_t *); 125 static int seq_do_chnvoice(struct sequencer_softc *, seq_event_t *); 126 static int seq_do_chncommon(struct sequencer_softc *, seq_event_t *); 127 static void seq_timer_waitabs(struct sequencer_softc *, uint32_t); 128 static int seq_do_timing(struct sequencer_softc *, seq_event_t *); 129 static int seq_do_local(struct sequencer_softc *, seq_event_t *); 130 static int seq_do_sysex(struct sequencer_softc *, seq_event_t *); 131 static int seq_do_fullsize(struct sequencer_softc *, seq_event_t *, struct uio *); 132 static int seq_input_event(struct sequencer_softc *, seq_event_t *); 133 static int seq_drain(struct sequencer_softc *); 134 static void seq_startoutput(struct sequencer_softc *); 135 static void seq_timeout(void *); 136 static int seq_to_new(seq_event_t *, struct uio *); 137 static void seq_softintr(void *); 138 139 static int midiseq_out(struct midi_dev *, u_char *, u_int, int); 140 static struct midi_dev *midiseq_open(int, int); 141 static void midiseq_close(struct midi_dev *); 142 static void midiseq_reset(struct midi_dev *); 143 static int midiseq_noteon(struct midi_dev *, int, int, seq_event_t *); 144 static int midiseq_noteoff(struct midi_dev *, int, int, seq_event_t *); 145 static int midiseq_keypressure(struct midi_dev *, int, int, seq_event_t *); 146 static int midiseq_pgmchange(struct midi_dev *, int, seq_event_t *); 147 static int midiseq_chnpressure(struct midi_dev *, int, seq_event_t *); 148 static int midiseq_ctlchange(struct midi_dev *, int, seq_event_t *); 149 static int midiseq_pitchbend(struct midi_dev *, int, seq_event_t *); 150 static int midiseq_loadpatch(struct midi_dev *, struct sysex_info *, struct uio *); 151 void midiseq_in(struct midi_dev *, u_char *, int); 152 153 static dev_type_open(sequenceropen); 154 static dev_type_close(sequencerclose); 155 static dev_type_read(sequencerread); 156 static dev_type_write(sequencerwrite); 157 static dev_type_ioctl(sequencerioctl); 158 static dev_type_poll(sequencerpoll); 159 static dev_type_kqfilter(sequencerkqfilter); 160 161 const struct cdevsw sequencer_cdevsw = { 162 sequenceropen, sequencerclose, sequencerread, sequencerwrite, 163 sequencerioctl, nostop, notty, sequencerpoll, nommap, 164 sequencerkqfilter, D_OTHER | D_MPSAFE 165 }; 166 167 void 168 sequencerattach(int n) 169 { 170 struct sequencer_softc *sc; 171 172 for (n = 0; n < NSEQUENCER; n++) { 173 sc = &seqdevs[n]; 174 callout_init(&sc->sc_callout, CALLOUT_MPSAFE); 175 sc->sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 176 seq_softintr, sc); 177 mutex_init(&sc->lock, MUTEX_DEFAULT, IPL_NONE); 178 cv_init(&sc->rchan, "midiseqr"); 179 cv_init(&sc->wchan, "midiseqw"); 180 cv_init(&sc->lchan, "midiseql"); 181 sc->pcq = pcq_create(SEQ_MAXQ, KM_SLEEP); 182 if (sc->pcq == NULL) { 183 panic("sequencerattach"); 184 } 185 } 186 } 187 188 /* 189 * Release reference to device acquired with sequencer_enter(). 190 */ 191 static void 192 sequencer_exit(struct sequencer_softc *sc) 193 { 194 195 sc->dvlock--; 196 cv_broadcast(&sc->lchan); 197 mutex_exit(&sc->lock); 198 } 199 200 /* 201 * Look up sequencer device and acquire locks for device access. 202 */ 203 static int 204 sequencer_enter(dev_t dev, struct sequencer_softc **scp) 205 { 206 struct sequencer_softc *sc; 207 int unit; 208 209 /* First, find the device and take sc_lock. */ 210 unit = SEQUENCERUNIT(dev); 211 if (unit >= NSEQUENCER) 212 return (ENXIO); 213 sc = &seqdevs[unit]; 214 if (sc == NULL) 215 return ENXIO; 216 mutex_enter(&sc->lock); 217 while (sc->dvlock) { 218 cv_wait(&sc->lchan, &sc->lock); 219 } 220 sc->dvlock++; 221 if (sc->dying) { 222 sequencer_exit(sc); 223 return EIO; 224 } 225 *scp = sc; 226 return 0; 227 } 228 229 static int 230 sequenceropen(dev_t dev, int flags, int ifmt, struct lwp *l) 231 { 232 int unit = SEQUENCERUNIT(dev); 233 struct sequencer_softc *sc; 234 struct midi_dev *md; 235 struct midi_softc *msc; 236 int error; 237 238 DPRINTF(("sequenceropen\n")); 239 240 if ((error = sequencer_enter(dev, &sc)) != 0) 241 return error; 242 KASSERT(sc == &seqdevs[unit]); 243 if (sc->isopen != 0) { 244 sequencer_exit(sc); 245 return EBUSY; 246 } 247 248 if (SEQ_IS_OLD(unit)) 249 sc->mode = SEQ_OLD; 250 else 251 sc->mode = SEQ_NEW; 252 sc->isopen++; 253 sc->flags = flags & (FREAD|FWRITE); 254 sc->pbus = 0; 255 sc->async = 0; 256 sc->input_stamp = ~0; 257 258 sc->nmidi = 0; 259 sc->ndevs = midi_unit_count(); 260 sc->timer.timebase_divperbeat = 100; 261 sc->timer.tempo_beatpermin = 60; 262 RECALC_USPERDIV(&sc->timer); 263 sc->timer.divs_lastevent = sc->timer.divs_lastchange = 0; 264 microtime(&sc->timer.reftime); 265 266 SEQ_QINIT(&sc->inq); 267 SEQ_QINIT(&sc->outq); 268 sc->lowat = SEQ_MAXQ / 2; 269 270 if (sc->ndevs > 0) { 271 mutex_exit(&sc->lock); 272 sc->devs = kmem_alloc(sc->ndevs * sizeof(struct midi_dev *), 273 KM_SLEEP); 274 for (unit = 0; unit < sc->ndevs; unit++) { 275 md = midiseq_open(unit, flags); 276 if (md) { 277 sc->devs[sc->nmidi++] = md; 278 md->seq = sc; 279 md->doingsysex = 0; 280 } 281 } 282 mutex_enter(&sc->lock); 283 } else { 284 sc->devs = NULL; 285 } 286 287 /* Only now redirect input from MIDI devices. */ 288 for (unit = 0; unit < sc->nmidi; unit++) { 289 msc = sc->devs[unit]->msc; 290 mutex_enter(msc->lock); 291 msc->seqopen = 1; 292 mutex_exit(msc->lock); 293 } 294 295 seq_reset(sc); 296 sequencer_exit(sc); 297 298 DPRINTF(("%s: mode=%d, nmidi=%d\n", __func__, sc->mode, sc->nmidi)); 299 return 0; 300 } 301 302 static int 303 seq_drain(struct sequencer_softc *sc) 304 { 305 int error; 306 307 KASSERT(mutex_owned(&sc->lock)); 308 309 DPRINTFN(3, ("seq_drain: %p, len=%d\n", sc, SEQ_QLEN(&sc->outq))); 310 seq_startoutput(sc); 311 error = 0; 312 while (!SEQ_QEMPTY(&sc->outq) && !error) 313 error = cv_timedwait_sig(&sc->wchan, &sc->lock, 60*hz); 314 return (error); 315 } 316 317 static void 318 seq_timeout(void *addr) 319 { 320 struct sequencer_softc *sc = addr; 321 proc_t *p; 322 pid_t pid; 323 324 DPRINTFN(4, ("seq_timeout: %p\n", sc)); 325 326 mutex_enter(&sc->lock); 327 if (sc->timeout == 0) { 328 mutex_spin_exit(&sc->lock); 329 return; 330 } 331 sc->timeout = 0; 332 seq_startoutput(sc); 333 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 334 mutex_exit(&sc->lock); 335 return; 336 } 337 cv_broadcast(&sc->wchan); 338 selnotify(&sc->wsel, 0, NOTE_SUBMIT); 339 if ((pid = sc->async) != 0) { 340 mutex_enter(proc_lock); 341 if ((p = proc_find(pid)) != NULL) 342 psignal(p, SIGIO); 343 mutex_exit(proc_lock); 344 } 345 mutex_exit(&sc->lock); 346 } 347 348 static void 349 seq_startoutput(struct sequencer_softc *sc) 350 { 351 struct sequencer_queue *q = &sc->outq; 352 seq_event_t cmd; 353 354 KASSERT(mutex_owned(&sc->lock)); 355 356 if (sc->timeout) 357 return; 358 DPRINTFN(4, ("seq_startoutput: %p, len=%d\n", sc, SEQ_QLEN(q))); 359 while (!SEQ_QEMPTY(q) && !sc->timeout) { 360 SEQ_QGET(q, cmd); 361 seq_do_command(sc, &cmd); 362 } 363 } 364 365 static int 366 sequencerclose(dev_t dev, int flags, int ifmt, struct lwp *l) 367 { 368 struct sequencer_softc *sc; 369 struct midi_softc *msc; 370 int unit, error; 371 372 DPRINTF(("sequencerclose: %"PRIx64"\n", dev)); 373 374 if ((error = sequencer_enter(dev, &sc)) != 0) 375 return error; 376 seq_drain(sc); 377 if (sc->timeout) { 378 callout_halt(&sc->sc_callout, &sc->lock); 379 sc->timeout = 0; 380 } 381 /* Bin input from MIDI devices. */ 382 for (unit = 0; unit < sc->nmidi; unit++) { 383 msc = sc->devs[unit]->msc; 384 mutex_enter(msc->lock); 385 msc->seqopen = 0; 386 mutex_exit(msc->lock); 387 } 388 mutex_exit(&sc->lock); 389 390 for (unit = 0; unit < sc->nmidi; unit++) 391 if (sc->devs[unit] != NULL) 392 midiseq_close(sc->devs[unit]); 393 if (sc->devs != NULL) { 394 KASSERT(sc->ndevs > 0); 395 kmem_free(sc->devs, sc->ndevs * sizeof(struct midi_dev *)); 396 sc->devs = NULL; 397 } 398 399 mutex_enter(&sc->lock); 400 sc->isopen = 0; 401 sequencer_exit(sc); 402 403 DPRINTF(("sequencerclose: %"PRIx64" done\n", dev)); 404 405 return (0); 406 } 407 408 static int 409 seq_input_event(struct sequencer_softc *sc, seq_event_t *cmd) 410 { 411 struct sequencer_queue *q; 412 413 KASSERT(mutex_owned(&sc->lock)); 414 415 DPRINTFN(2, ("seq_input_event: %02x %02x %02x %02x %02x " 416 "%02x %02x %02x\n", cmd->tag, 417 cmd->unknown.byte[0], cmd->unknown.byte[1], 418 cmd->unknown.byte[2], cmd->unknown.byte[3], 419 cmd->unknown.byte[4], cmd->unknown.byte[5], 420 cmd->unknown.byte[6])); 421 q = &sc->inq; 422 if (SEQ_QFULL(q)) 423 return (ENOMEM); 424 SEQ_QPUT(q, *cmd); 425 cv_broadcast(&sc->rchan); 426 selnotify(&sc->rsel, 0, NOTE_SUBMIT); 427 if (sc->async != 0) { 428 proc_t *p; 429 430 mutex_enter(proc_lock); 431 if ((p = proc_find(sc->async)) != NULL) 432 psignal(p, SIGIO); 433 mutex_exit(proc_lock); 434 } 435 return 0; 436 } 437 438 static void 439 seq_softintr(void *addr) 440 { 441 struct sequencer_softc *sc; 442 struct timeval now; 443 seq_event_t ev; 444 int status, chan, unit; 445 sequencer_pcqitem_t qi; 446 u_long t; 447 448 sc = addr; 449 450 mutex_enter(&sc->lock); 451 452 qi.qi_ptr = pcq_get(sc->pcq); 453 if (qi.qi_ptr == NULL) { 454 mutex_exit(&sc->lock); 455 return; 456 } 457 KASSERT((qi.qi_msg[3] & 0x80) != 0); 458 unit = qi.qi_msg[3] & ~0x80; 459 status = MIDI_GET_STATUS(qi.qi_msg[0]); 460 chan = MIDI_GET_CHAN(qi.qi_msg[0]); 461 switch (status) { 462 case MIDI_NOTEON: /* midi(4) always canonicalizes hidden note-off */ 463 ev = SEQ_MK_CHN(NOTEON, .device=unit, .channel=chan, 464 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 465 break; 466 case MIDI_NOTEOFF: 467 ev = SEQ_MK_CHN(NOTEOFF, .device=unit, .channel=chan, 468 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 469 break; 470 case MIDI_KEY_PRESSURE: 471 ev = SEQ_MK_CHN(KEY_PRESSURE, .device=unit, .channel=chan, 472 .key=qi.qi_msg[1], .pressure=qi.qi_msg[2]); 473 break; 474 case MIDI_CTL_CHANGE: /* XXX not correct for MSB */ 475 ev = SEQ_MK_CHN(CTL_CHANGE, .device=unit, .channel=chan, 476 .controller=qi.qi_msg[1], .value=qi.qi_msg[2]); 477 break; 478 case MIDI_PGM_CHANGE: 479 ev = SEQ_MK_CHN(PGM_CHANGE, .device=unit, .channel=chan, 480 .program=qi.qi_msg[1]); 481 break; 482 case MIDI_CHN_PRESSURE: 483 ev = SEQ_MK_CHN(CHN_PRESSURE, .device=unit, .channel=chan, 484 .pressure=qi.qi_msg[1]); 485 break; 486 case MIDI_PITCH_BEND: 487 ev = SEQ_MK_CHN(PITCH_BEND, .device=unit, .channel=chan, 488 .value=(qi.qi_msg[1] & 0x7f) | ((qi.qi_msg[2] & 0x7f) << 7)); 489 break; 490 default: /* this is now the point where MIDI_ACKs disappear */ 491 mutex_exit(&sc->lock); 492 return; 493 } 494 microtime(&now); 495 if (!sc->timer.running) 496 now = sc->timer.stoptime; 497 SUBTIMEVAL(&now, &sc->timer.reftime); 498 t = now.tv_sec * 1000000 + now.tv_usec; 499 t /= sc->timer.usperdiv; 500 t += sc->timer.divs_lastchange; 501 if (t != sc->input_stamp) { 502 seq_input_event(sc, &SEQ_MK_TIMING(WAIT_ABS, .divisions=t)); 503 sc->input_stamp = t; /* XXX wha hoppen if timer is reset? */ 504 } 505 seq_input_event(sc, &ev); 506 mutex_exit(&sc->lock); 507 } 508 509 static int 510 sequencerread(dev_t dev, struct uio *uio, int ioflag) 511 { 512 struct sequencer_softc *sc; 513 struct sequencer_queue *q; 514 seq_event_t ev; 515 int error; 516 517 DPRINTFN(20, ("sequencerread: %"PRIx64", count=%d, ioflag=%x\n", 518 dev, (int)uio->uio_resid, ioflag)); 519 520 if ((error = sequencer_enter(dev, &sc)) != 0) 521 return error; 522 q = &sc->inq; 523 524 if (sc->mode == SEQ_OLD) { 525 sequencer_exit(sc); 526 DPRINTFN(-1,("sequencerread: old read\n")); 527 return EINVAL; /* XXX unimplemented */ 528 } 529 while (SEQ_QEMPTY(q)) { 530 if (ioflag & IO_NDELAY) { 531 error = EWOULDBLOCK; 532 break; 533 } 534 /* Drop lock to allow concurrent read/write. */ 535 KASSERT(sc->dvlock != 0); 536 sc->dvlock--; 537 error = cv_wait_sig(&sc->rchan, &sc->lock); 538 while (sc->dvlock != 0) { 539 cv_wait(&sc->lchan, &sc->lock); 540 } 541 sc->dvlock++; 542 if (error) { 543 break; 544 } 545 } 546 while (uio->uio_resid >= sizeof(ev) && !error && !SEQ_QEMPTY(q)) { 547 SEQ_QGET(q, ev); 548 mutex_exit(&sc->lock); 549 error = uiomove(&ev, sizeof(ev), uio); 550 mutex_enter(&sc->lock); 551 } 552 sequencer_exit(sc); 553 return error; 554 } 555 556 static int 557 sequencerwrite(dev_t dev, struct uio *uio, int ioflag) 558 { 559 struct sequencer_softc *sc; 560 struct sequencer_queue *q; 561 int error; 562 seq_event_t cmdbuf; 563 int size; 564 565 DPRINTFN(2, ("sequencerwrite: %"PRIx64", count=%d\n", dev, 566 (int)uio->uio_resid)); 567 568 if ((error = sequencer_enter(dev, &sc)) != 0) 569 return error; 570 q = &sc->outq; 571 572 size = sc->mode == SEQ_NEW ? sizeof cmdbuf : SEQOLD_CMDSIZE; 573 while (uio->uio_resid >= size && error == 0) { 574 mutex_exit(&sc->lock); 575 error = uiomove(&cmdbuf, size, uio); 576 if (error == 0) { 577 if (sc->mode == SEQ_OLD && seq_to_new(&cmdbuf, uio)) { 578 mutex_enter(&sc->lock); 579 continue; 580 } 581 if (cmdbuf.tag == SEQ_FULLSIZE) { 582 /* We do it like OSS does, asynchronously */ 583 error = seq_do_fullsize(sc, &cmdbuf, uio); 584 if (error == 0) { 585 mutex_enter(&sc->lock); 586 continue; 587 } 588 } 589 } 590 mutex_enter(&sc->lock); 591 if (error != 0) { 592 break; 593 } 594 while (SEQ_QFULL(q)) { 595 seq_startoutput(sc); 596 if (SEQ_QFULL(q)) { 597 if (ioflag & IO_NDELAY) { 598 error = EWOULDBLOCK; 599 break; 600 } 601 error = cv_wait_sig(&sc->wchan, &sc->lock); 602 if (error) { 603 break; 604 } 605 } 606 } 607 if (error == 0) { 608 SEQ_QPUT(q, cmdbuf); 609 } 610 } 611 if (error == 0) { 612 seq_startoutput(sc); 613 } else { 614 DPRINTFN(2, ("sequencerwrite: error=%d\n", error)); 615 } 616 sequencer_exit(sc); 617 return error; 618 } 619 620 static int 621 sequencerioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 622 { 623 struct sequencer_softc *sc; 624 struct synth_info *si; 625 struct midi_dev *md; 626 int devno, error, t; 627 struct timeval now; 628 u_long tx; 629 630 DPRINTFN(2, ("sequencerioctl: %"PRIx64" cmd=0x%08lx\n", dev, cmd)); 631 632 if ((error = sequencer_enter(dev, &sc)) != 0) 633 return error; 634 switch (cmd) { 635 case FIONBIO: 636 /* All handled in the upper FS layer. */ 637 break; 638 639 case FIOASYNC: 640 if (*(int *)addr) { 641 if (sc->async != 0) 642 return EBUSY; 643 sc->async = curproc->p_pid; 644 DPRINTF(("sequencer_ioctl: FIOASYNC %d\n", 645 sc->async)); 646 } else { 647 sc->async = 0; 648 } 649 break; 650 651 case SEQUENCER_RESET: 652 seq_reset(sc); 653 break; 654 655 case SEQUENCER_PANIC: 656 seq_reset(sc); 657 /* Do more? OSS doesn't */ 658 break; 659 660 case SEQUENCER_SYNC: 661 if (sc->flags != FREAD) 662 seq_drain(sc); 663 break; 664 665 case SEQUENCER_INFO: 666 si = (struct synth_info*)addr; 667 devno = si->device; 668 if (devno < 0 || devno >= sc->nmidi) { 669 error = EINVAL; 670 break; 671 } 672 md = sc->devs[devno]; 673 strncpy(si->name, md->name, sizeof si->name); 674 si->synth_type = SYNTH_TYPE_MIDI; 675 si->synth_subtype = md->subtype; 676 si->nr_voices = md->nr_voices; 677 si->instr_bank_size = md->instr_bank_size; 678 si->capabilities = md->capabilities; 679 break; 680 681 case SEQUENCER_NRSYNTHS: 682 *(int *)addr = sc->nmidi; 683 break; 684 685 case SEQUENCER_NRMIDIS: 686 *(int *)addr = sc->nmidi; 687 break; 688 689 case SEQUENCER_OUTOFBAND: 690 DPRINTFN(3, ("sequencer_ioctl: OOB=%02x %02x %02x %02x %02x %02x %02x %02x\n", 691 *(u_char *)addr, *((u_char *)addr+1), 692 *((u_char *)addr+2), *((u_char *)addr+3), 693 *((u_char *)addr+4), *((u_char *)addr+5), 694 *((u_char *)addr+6), *((u_char *)addr+7))); 695 if ((sc->flags & FWRITE) == 0) { 696 error = EBADF; 697 } else { 698 error = seq_do_command(sc, (seq_event_t *)addr); 699 } 700 break; 701 702 case SEQUENCER_TMR_TIMEBASE: 703 t = *(int *)addr; 704 if (t < 1) 705 t = 1; 706 if (t > 10000) 707 t = 10000; 708 *(int *)addr = t; 709 sc->timer.timebase_divperbeat = t; 710 sc->timer.divs_lastchange = sc->timer.divs_lastevent; 711 microtime(&sc->timer.reftime); 712 RECALC_USPERDIV(&sc->timer); 713 break; 714 715 case SEQUENCER_TMR_START: 716 error = seq_do_timing(sc, &SEQ_MK_TIMING(START)); 717 break; 718 719 case SEQUENCER_TMR_STOP: 720 error = seq_do_timing(sc, &SEQ_MK_TIMING(STOP)); 721 break; 722 723 case SEQUENCER_TMR_CONTINUE: 724 error = seq_do_timing(sc, &SEQ_MK_TIMING(CONTINUE)); 725 break; 726 727 case SEQUENCER_TMR_TEMPO: 728 error = seq_do_timing(sc, 729 &SEQ_MK_TIMING(TEMPO, .bpm=*(int *)addr)); 730 if (error == 0) 731 *(int *)addr = sc->timer.tempo_beatpermin; 732 break; 733 734 case SEQUENCER_TMR_SOURCE: 735 *(int *)addr = SEQUENCER_TMR_INTERNAL; 736 break; 737 738 case SEQUENCER_TMR_METRONOME: 739 /* noop */ 740 break; 741 742 case SEQUENCER_THRESHOLD: 743 t = SEQ_MAXQ - *(int *)addr / sizeof (seq_event_rec); 744 if (t < 1) 745 t = 1; 746 if (t > SEQ_MAXQ) 747 t = SEQ_MAXQ; 748 sc->lowat = t; 749 break; 750 751 case SEQUENCER_CTRLRATE: 752 *(int *)addr = (sc->timer.tempo_beatpermin 753 *sc->timer.timebase_divperbeat + 30) / 60; 754 break; 755 756 case SEQUENCER_GETTIME: 757 microtime(&now); 758 SUBTIMEVAL(&now, &sc->timer.reftime); 759 tx = now.tv_sec * 1000000 + now.tv_usec; 760 tx /= sc->timer.usperdiv; 761 tx += sc->timer.divs_lastchange; 762 *(int *)addr = tx; 763 break; 764 765 default: 766 DPRINTFN(-1,("sequencer_ioctl: unimpl %08lx\n", cmd)); 767 error = EINVAL; 768 break; 769 } 770 sequencer_exit(sc); 771 772 return error; 773 } 774 775 static int 776 sequencerpoll(dev_t dev, int events, struct lwp *l) 777 { 778 struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)]; 779 int revents = 0; 780 781 DPRINTF(("sequencerpoll: %p events=0x%x\n", sc, events)); 782 783 mutex_enter(&sc->lock); 784 if (events & (POLLIN | POLLRDNORM)) 785 if ((sc->flags&FREAD) && !SEQ_QEMPTY(&sc->inq)) 786 revents |= events & (POLLIN | POLLRDNORM); 787 788 if (events & (POLLOUT | POLLWRNORM)) 789 if ((sc->flags&FWRITE) && SEQ_QLEN(&sc->outq) < sc->lowat) 790 revents |= events & (POLLOUT | POLLWRNORM); 791 792 if (revents == 0) { 793 if ((sc->flags&FREAD) && (events & (POLLIN | POLLRDNORM))) 794 selrecord(l, &sc->rsel); 795 796 if ((sc->flags&FWRITE) && (events & (POLLOUT | POLLWRNORM))) 797 selrecord(l, &sc->wsel); 798 } 799 mutex_exit(&sc->lock); 800 801 return revents; 802 } 803 804 static void 805 filt_sequencerrdetach(struct knote *kn) 806 { 807 struct sequencer_softc *sc = kn->kn_hook; 808 809 mutex_enter(&sc->lock); 810 SLIST_REMOVE(&sc->rsel.sel_klist, kn, knote, kn_selnext); 811 mutex_exit(&sc->lock); 812 } 813 814 static int 815 filt_sequencerread(struct knote *kn, long hint) 816 { 817 struct sequencer_softc *sc = kn->kn_hook; 818 int rv; 819 820 if (hint != NOTE_SUBMIT) { 821 mutex_enter(&sc->lock); 822 } 823 if (SEQ_QEMPTY(&sc->inq)) { 824 rv = 0; 825 } else { 826 kn->kn_data = sizeof(seq_event_rec); 827 rv = 1; 828 } 829 if (hint != NOTE_SUBMIT) { 830 mutex_exit(&sc->lock); 831 } 832 return rv; 833 } 834 835 static const struct filterops sequencerread_filtops = 836 { 1, NULL, filt_sequencerrdetach, filt_sequencerread }; 837 838 static void 839 filt_sequencerwdetach(struct knote *kn) 840 { 841 struct sequencer_softc *sc = kn->kn_hook; 842 843 mutex_enter(&sc->lock); 844 SLIST_REMOVE(&sc->wsel.sel_klist, kn, knote, kn_selnext); 845 mutex_exit(&sc->lock); 846 } 847 848 static int 849 filt_sequencerwrite(struct knote *kn, long hint) 850 { 851 struct sequencer_softc *sc = kn->kn_hook; 852 int rv; 853 854 if (hint != NOTE_SUBMIT) { 855 mutex_enter(&sc->lock); 856 } 857 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 858 rv = 0; 859 } else { 860 kn->kn_data = sizeof(seq_event_rec); 861 rv = 1; 862 } 863 if (hint != NOTE_SUBMIT) { 864 mutex_exit(&sc->lock); 865 } 866 return rv; 867 } 868 869 static const struct filterops sequencerwrite_filtops = 870 { 1, NULL, filt_sequencerwdetach, filt_sequencerwrite }; 871 872 static int 873 sequencerkqfilter(dev_t dev, struct knote *kn) 874 { 875 struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)]; 876 struct klist *klist; 877 878 switch (kn->kn_filter) { 879 case EVFILT_READ: 880 klist = &sc->rsel.sel_klist; 881 kn->kn_fop = &sequencerread_filtops; 882 break; 883 884 case EVFILT_WRITE: 885 klist = &sc->wsel.sel_klist; 886 kn->kn_fop = &sequencerwrite_filtops; 887 break; 888 889 default: 890 return (EINVAL); 891 } 892 893 kn->kn_hook = sc; 894 895 mutex_enter(&sc->lock); 896 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 897 mutex_exit(&sc->lock); 898 899 return (0); 900 } 901 902 static void 903 seq_reset(struct sequencer_softc *sc) 904 { 905 int i, chn; 906 struct midi_dev *md; 907 908 KASSERT(mutex_owned(&sc->lock)); 909 910 if ( !(sc->flags & FWRITE) ) 911 return; 912 for (i = 0; i < sc->nmidi; i++) { 913 md = sc->devs[i]; 914 midiseq_reset(md); 915 for (chn = 0; chn < MAXCHAN; chn++) { 916 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 917 .controller=MIDI_CTRL_NOTES_OFF)); 918 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 919 .controller=MIDI_CTRL_RESET)); 920 midiseq_pitchbend(md, chn, &SEQ_MK_CHN(PITCH_BEND, 921 .value=MIDI_BEND_NEUTRAL)); 922 } 923 } 924 } 925 926 static int 927 seq_do_command(struct sequencer_softc *sc, seq_event_t *b) 928 { 929 int dev; 930 931 KASSERT(mutex_owned(&sc->lock)); 932 933 DPRINTFN(4, ("seq_do_command: %p cmd=0x%02x\n", sc, b->timing.op)); 934 935 switch(b->tag) { 936 case SEQ_LOCAL: 937 return seq_do_local(sc, b); 938 case SEQ_TIMING: 939 return seq_do_timing(sc, b); 940 case SEQ_CHN_VOICE: 941 return seq_do_chnvoice(sc, b); 942 case SEQ_CHN_COMMON: 943 return seq_do_chncommon(sc, b); 944 case SEQ_SYSEX: 945 return seq_do_sysex(sc, b); 946 /* COMPAT */ 947 case SEQOLD_MIDIPUTC: 948 dev = b->putc.device; 949 if (dev < 0 || dev >= sc->nmidi) 950 return (ENXIO); 951 return midiseq_out(sc->devs[dev], &b->putc.byte, 1, 0); 952 default: 953 DPRINTFN(-1,("seq_do_command: unimpl command %02x\n", b->tag)); 954 return (EINVAL); 955 } 956 } 957 958 static int 959 seq_do_chnvoice(struct sequencer_softc *sc, seq_event_t *b) 960 { 961 int dev; 962 int error; 963 struct midi_dev *md; 964 965 KASSERT(mutex_owned(&sc->lock)); 966 967 dev = b->voice.device; 968 if (dev < 0 || dev >= sc->nmidi || 969 b->voice.channel > 15 || 970 b->voice.key >= SEQ_NOTE_MAX) 971 return ENXIO; 972 md = sc->devs[dev]; 973 switch(b->voice.op) { 974 case MIDI_NOTEON: /* no need to special-case hidden noteoff here */ 975 error = midiseq_noteon(md, b->voice.channel, b->voice.key, b); 976 break; 977 case MIDI_NOTEOFF: 978 error = midiseq_noteoff(md, b->voice.channel, b->voice.key, b); 979 break; 980 case MIDI_KEY_PRESSURE: 981 error = midiseq_keypressure(md, 982 b->voice.channel, b->voice.key, b); 983 break; 984 default: 985 DPRINTFN(-1,("seq_do_chnvoice: unimpl command %02x\n", 986 b->voice.op)); 987 error = EINVAL; 988 break; 989 } 990 return error; 991 } 992 993 static int 994 seq_do_chncommon(struct sequencer_softc *sc, seq_event_t *b) 995 { 996 int dev; 997 int error; 998 struct midi_dev *md; 999 1000 KASSERT(mutex_owned(&sc->lock)); 1001 1002 dev = b->common.device; 1003 if (dev < 0 || dev >= sc->nmidi || 1004 b->common.channel > 15) 1005 return ENXIO; 1006 md = sc->devs[dev]; 1007 DPRINTFN(2,("seq_do_chncommon: %02x\n", b->common.op)); 1008 1009 error = 0; 1010 switch(b->common.op) { 1011 case MIDI_PGM_CHANGE: 1012 error = midiseq_pgmchange(md, b->common.channel, b); 1013 break; 1014 case MIDI_CTL_CHANGE: 1015 error = midiseq_ctlchange(md, b->common.channel, b); 1016 break; 1017 case MIDI_PITCH_BEND: 1018 error = midiseq_pitchbend(md, b->common.channel, b); 1019 break; 1020 case MIDI_CHN_PRESSURE: 1021 error = midiseq_chnpressure(md, b->common.channel, b); 1022 break; 1023 default: 1024 DPRINTFN(-1,("seq_do_chncommon: unimpl command %02x\n", 1025 b->common.op)); 1026 error = EINVAL; 1027 break; 1028 } 1029 return error; 1030 } 1031 1032 static int 1033 seq_do_local(struct sequencer_softc *sc, seq_event_t *b) 1034 { 1035 1036 KASSERT(mutex_owned(&sc->lock)); 1037 1038 return (EINVAL); 1039 } 1040 1041 static int 1042 seq_do_sysex(struct sequencer_softc *sc, seq_event_t *b) 1043 { 1044 int dev, i; 1045 struct midi_dev *md; 1046 uint8_t *bf = b->sysex.buffer; 1047 1048 KASSERT(mutex_owned(&sc->lock)); 1049 1050 dev = b->sysex.device; 1051 if (dev < 0 || dev >= sc->nmidi) 1052 return (ENXIO); 1053 DPRINTF(("seq_do_sysex: dev=%d\n", dev)); 1054 md = sc->devs[dev]; 1055 1056 if (!md->doingsysex) { 1057 midiseq_out(md, (uint8_t[]){MIDI_SYSEX_START}, 1, 0); 1058 md->doingsysex = 1; 1059 } 1060 1061 for (i = 0; i < 6 && bf[i] != 0xff; i++) 1062 ; 1063 midiseq_out(md, bf, i, 0); 1064 if (i < 6 || (i > 0 && bf[i-1] == MIDI_SYSEX_END)) 1065 md->doingsysex = 0; 1066 return 0; 1067 } 1068 1069 static void 1070 seq_timer_waitabs(struct sequencer_softc *sc, uint32_t divs) 1071 { 1072 struct timeval when; 1073 long long usec; 1074 struct syn_timer *t; 1075 int ticks; 1076 1077 KASSERT(mutex_owned(&sc->lock)); 1078 1079 t = &sc->timer; 1080 t->divs_lastevent = divs; 1081 divs -= t->divs_lastchange; 1082 usec = (long long)divs * (long long)t->usperdiv; /* convert to usec */ 1083 when.tv_sec = usec / 1000000; 1084 when.tv_usec = usec % 1000000; 1085 DPRINTFN(4, ("seq_timer_waitabs: adjdivs=%d, sleep when=%"PRId64".%06"PRId64, 1086 divs, when.tv_sec, (uint64_t)when.tv_usec)); 1087 ADDTIMEVAL(&when, &t->reftime); /* abstime for end */ 1088 ticks = tvhzto(&when); 1089 DPRINTFN(4, (" when+start=%"PRId64".%06"PRId64", tick=%d\n", 1090 when.tv_sec, (uint64_t)when.tv_usec, ticks)); 1091 if (ticks > 0) { 1092 #ifdef DIAGNOSTIC 1093 if (ticks > 20 * hz) { 1094 /* Waiting more than 20s */ 1095 printf("seq_timer_waitabs: funny ticks=%d, " 1096 "usec=%lld\n", ticks, usec); 1097 } 1098 #endif 1099 sc->timeout = 1; 1100 callout_reset(&sc->sc_callout, ticks, 1101 seq_timeout, sc); 1102 } 1103 #ifdef SEQUENCER_DEBUG 1104 else if (tick < 0) 1105 DPRINTF(("seq_timer_waitabs: ticks = %d\n", ticks)); 1106 #endif 1107 } 1108 1109 static int 1110 seq_do_timing(struct sequencer_softc *sc, seq_event_t *b) 1111 { 1112 struct syn_timer *t = &sc->timer; 1113 struct timeval when; 1114 int error; 1115 1116 KASSERT(mutex_owned(&sc->lock)); 1117 1118 error = 0; 1119 switch(b->timing.op) { 1120 case TMR_WAIT_REL: 1121 seq_timer_waitabs(sc, 1122 b->t_WAIT_REL.divisions + t->divs_lastevent); 1123 break; 1124 case TMR_WAIT_ABS: 1125 seq_timer_waitabs(sc, b->t_WAIT_ABS.divisions); 1126 break; 1127 case TMR_START: 1128 microtime(&t->reftime); 1129 t->divs_lastevent = t->divs_lastchange = 0; 1130 t->running = 1; 1131 break; 1132 case TMR_STOP: 1133 microtime(&t->stoptime); 1134 t->running = 0; 1135 break; 1136 case TMR_CONTINUE: 1137 if (t->running) 1138 break; 1139 microtime(&when); 1140 SUBTIMEVAL(&when, &t->stoptime); 1141 ADDTIMEVAL(&t->reftime, &when); 1142 t->running = 1; 1143 break; 1144 case TMR_TEMPO: 1145 /* bpm is unambiguously MIDI clocks per minute / 24 */ 1146 /* (24 MIDI clocks are usually but not always a quarter note) */ 1147 if (b->t_TEMPO.bpm < 8) /* where are these limits specified? */ 1148 t->tempo_beatpermin = 8; 1149 else if (b->t_TEMPO.bpm > 360) /* ? */ 1150 t->tempo_beatpermin = 360; 1151 else 1152 t->tempo_beatpermin = b->t_TEMPO.bpm; 1153 t->divs_lastchange = t->divs_lastevent; 1154 microtime(&t->reftime); 1155 RECALC_USPERDIV(t); 1156 break; 1157 case TMR_ECHO: 1158 error = seq_input_event(sc, b); 1159 break; 1160 case TMR_RESET: 1161 t->divs_lastevent = t->divs_lastchange = 0; 1162 microtime(&t->reftime); 1163 break; 1164 case TMR_SPP: 1165 case TMR_TIMESIG: 1166 DPRINTF(("seq_do_timing: unimplemented %02x\n", b->timing.op)); 1167 error = EINVAL; /* not quite accurate... */ 1168 break; 1169 default: 1170 DPRINTF(("seq_timer: unknown %02x\n", b->timing.op)); 1171 error = EINVAL; 1172 break; 1173 } 1174 return (error); 1175 } 1176 1177 static int 1178 seq_do_fullsize(struct sequencer_softc *sc, seq_event_t *b, struct uio *uio) 1179 { 1180 struct sysex_info sysex; 1181 u_int dev; 1182 1183 #ifdef DIAGNOSTIC 1184 if (sizeof(seq_event_rec) != SEQ_SYSEX_HDRSIZE) { 1185 printf("seq_do_fullsize: sysex size ??\n"); 1186 return EINVAL; 1187 } 1188 #endif 1189 memcpy(&sysex, b, sizeof sysex); 1190 dev = sysex.device_no; 1191 if (/* dev < 0 || */ dev >= sc->nmidi) 1192 return (ENXIO); 1193 DPRINTFN(2, ("seq_do_fullsize: fmt=%04x, dev=%d, len=%d\n", 1194 sysex.key, dev, sysex.len)); 1195 return (midiseq_loadpatch(sc->devs[dev], &sysex, uio)); 1196 } 1197 1198 /* 1199 * Convert an old sequencer event to a new one. 1200 * NOTE: on entry, *ev may contain valid data only in the first 4 bytes. 1201 * That may be true even on exit (!) in the case of SEQOLD_MIDIPUTC; the 1202 * caller will only look at the first bytes in that case anyway. Ugly? Sure. 1203 */ 1204 static int 1205 seq_to_new(seq_event_t *ev, struct uio *uio) 1206 { 1207 int cmd, chan, note, parm; 1208 uint32_t tmp_delay; 1209 int error; 1210 uint8_t *bfp; 1211 1212 cmd = ev->tag; 1213 bfp = ev->unknown.byte; 1214 chan = *bfp++; 1215 note = *bfp++; 1216 parm = *bfp++; 1217 DPRINTFN(3, ("seq_to_new: 0x%02x %d %d %d\n", cmd, chan, note, parm)); 1218 1219 if (cmd >= 0x80) { 1220 /* Fill the event record */ 1221 if (uio->uio_resid >= sizeof *ev - SEQOLD_CMDSIZE) { 1222 error = uiomove(bfp, sizeof *ev - SEQOLD_CMDSIZE, uio); 1223 if (error) 1224 return error; 1225 } else 1226 return EINVAL; 1227 } 1228 1229 switch(cmd) { 1230 case SEQOLD_NOTEOFF: 1231 /* 1232 * What's with the SEQ_NOTE_XXX? In OSS this seems to have 1233 * been undocumented magic for messing with the overall volume 1234 * of a 'voice', equated precariously with 'channel' and 1235 * pretty much unimplementable except by directly frobbing a 1236 * synth chip. For us, who treat everything as interfaced over 1237 * MIDI, this will just be unceremoniously discarded as 1238 * invalid in midiseq_noteoff, making the whole event an 1239 * elaborate no-op, and that doesn't seem to be any different 1240 * from what happens on linux with a MIDI-interfaced device, 1241 * by the way. The moral is ... use the new /dev/music API, ok? 1242 */ 1243 *ev = SEQ_MK_CHN(NOTEOFF, .device=0, .channel=chan, 1244 .key=SEQ_NOTE_XXX, .velocity=parm); 1245 break; 1246 case SEQOLD_NOTEON: 1247 *ev = SEQ_MK_CHN(NOTEON, 1248 .device=0, .channel=chan, .key=note, .velocity=parm); 1249 break; 1250 case SEQOLD_WAIT: 1251 /* 1252 * This event cannot even /exist/ on non-littleendian machines, 1253 * and so help me, that's exactly the way OSS defined it. 1254 * Also, the OSS programmer's guide states (p. 74, v1.11) 1255 * that seqold time units are system clock ticks, unlike 1256 * the new 'divisions' which are determined by timebase. In 1257 * that case we would need to do scaling here - but no such 1258 * behavior is visible in linux either--which also treats this 1259 * value, surprisingly, as an absolute, not relative, time. 1260 * My guess is that this event has gone unused so long that 1261 * nobody could agree we got it wrong no matter what we do. 1262 */ 1263 tmp_delay = *(uint32_t *)ev >> 8; 1264 *ev = SEQ_MK_TIMING(WAIT_ABS, .divisions=tmp_delay); 1265 break; 1266 case SEQOLD_SYNCTIMER: 1267 /* 1268 * The TMR_RESET event is not defined in any OSS materials 1269 * I can find; it may have been invented here just to provide 1270 * an accurate _to_new translation of this event. 1271 */ 1272 *ev = SEQ_MK_TIMING(RESET); 1273 break; 1274 case SEQOLD_PGMCHANGE: 1275 *ev = SEQ_MK_CHN(PGM_CHANGE, 1276 .device=0, .channel=chan, .program=note); 1277 break; 1278 case SEQOLD_MIDIPUTC: 1279 break; /* interpret in normal mode */ 1280 case SEQOLD_ECHO: 1281 case SEQOLD_PRIVATE: 1282 case SEQOLD_EXTENDED: 1283 default: 1284 DPRINTF(("seq_to_new: not impl 0x%02x\n", cmd)); 1285 return EINVAL; 1286 /* In case new-style events show up */ 1287 case SEQ_TIMING: 1288 case SEQ_CHN_VOICE: 1289 case SEQ_CHN_COMMON: 1290 case SEQ_FULLSIZE: 1291 break; 1292 } 1293 return 0; 1294 } 1295 1296 /**********************************************/ 1297 1298 void 1299 midiseq_in(struct midi_dev *md, u_char *msg, int len) 1300 { 1301 struct sequencer_softc *sc; 1302 sequencer_pcqitem_t qi; 1303 1304 DPRINTFN(2, ("midiseq_in: %p %02x %02x %02x\n", 1305 md, msg[0], msg[1], msg[2])); 1306 1307 sc = md->seq; 1308 1309 qi.qi_msg[0] = msg[0]; 1310 qi.qi_msg[1] = msg[1]; 1311 qi.qi_msg[2] = msg[2]; 1312 qi.qi_msg[3] = md->unit | 0x80; /* ensure non-zero value of qi_ptr */ 1313 pcq_put(sc->pcq, qi.qi_ptr); 1314 softint_schedule(sc->sih); 1315 } 1316 1317 static struct midi_dev * 1318 midiseq_open(int unit, int flags) 1319 { 1320 extern struct cfdriver midi_cd; 1321 int error; 1322 struct midi_dev *md; 1323 struct midi_softc *sc; 1324 struct midi_info mi; 1325 int major; 1326 dev_t dev; 1327 vnode_t *vp; 1328 int oflags; 1329 1330 major = devsw_name2chr("midi", NULL, 0); 1331 dev = makedev(major, unit); 1332 1333 DPRINTFN(2, ("midiseq_open: %d %d\n", unit, flags)); 1334 1335 error = cdevvp(dev, &vp); 1336 if (error) 1337 return NULL; 1338 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1339 error = VOP_OPEN(vp, flags, kauth_cred_get()); 1340 VOP_UNLOCK(vp); 1341 if (error) { 1342 vrele(vp); 1343 return NULL; 1344 } 1345 1346 /* Only after we have acquired reference via VOP_OPEN(). */ 1347 midi_getinfo(dev, &mi); 1348 oflags = flags; 1349 if ((mi.props & MIDI_PROP_CAN_INPUT) == 0) 1350 flags &= ~FREAD; 1351 if ((flags & (FREAD|FWRITE)) == 0) { 1352 VOP_CLOSE(vp, oflags, kauth_cred_get()); 1353 vrele(vp); 1354 return NULL; 1355 } 1356 1357 sc = device_lookup_private(&midi_cd, unit); 1358 md = kmem_zalloc(sizeof(*md), KM_SLEEP); 1359 md->msc = sc; 1360 md->unit = unit; 1361 md->name = mi.name; 1362 md->subtype = 0; 1363 md->nr_voices = 128; /* XXX */ 1364 md->instr_bank_size = 128; /* XXX */ 1365 md->vp = vp; 1366 if (mi.props & MIDI_PROP_CAN_INPUT) 1367 md->capabilities |= SYNTH_CAP_INPUT; 1368 sc->seq_md = md; 1369 return (md); 1370 } 1371 1372 static void 1373 midiseq_close(struct midi_dev *md) 1374 { 1375 int major; 1376 dev_t dev; 1377 1378 major = devsw_name2chr("midi", NULL, 0); 1379 dev = makedev(major, md->unit); 1380 1381 DPRINTFN(2, ("midiseq_close: %d\n", md->unit)); 1382 (void)vn_close(md->vp, 0, kauth_cred_get()); 1383 kmem_free(md, sizeof(*md)); 1384 } 1385 1386 static void 1387 midiseq_reset(struct midi_dev *md) 1388 { 1389 /* XXX send GM reset? */ 1390 DPRINTFN(3, ("midiseq_reset: %d\n", md->unit)); 1391 } 1392 1393 static int 1394 midiseq_out(struct midi_dev *md, u_char *bf, u_int cc, int chk) 1395 { 1396 DPRINTFN(5, ("midiseq_out: m=%p, unit=%d, bf[0]=0x%02x, cc=%d\n", 1397 md->msc, md->unit, bf[0], cc)); 1398 1399 /* midi(4) does running status compression where appropriate. */ 1400 return midi_writebytes(md->unit, bf, cc); 1401 } 1402 1403 /* 1404 * If the writing process hands us a hidden note-off in a note-on event, 1405 * we will simply write it that way; no need to special case it here, 1406 * as midi(4) will always canonicalize or compress as appropriate anyway. 1407 */ 1408 static int 1409 midiseq_noteon(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1410 { 1411 return midiseq_out(md, (uint8_t[]){ 1412 MIDI_NOTEON | chan, key, ev->c_NOTEON.velocity & 0x7f}, 3, 1); 1413 } 1414 1415 static int 1416 midiseq_noteoff(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1417 { 1418 return midiseq_out(md, (uint8_t[]){ 1419 MIDI_NOTEOFF | chan, key, ev->c_NOTEOFF.velocity & 0x7f}, 3, 1); 1420 } 1421 1422 static int 1423 midiseq_keypressure(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1424 { 1425 return midiseq_out(md, (uint8_t[]){ 1426 MIDI_KEY_PRESSURE | chan, key, 1427 ev->c_KEY_PRESSURE.pressure & 0x7f}, 3, 1); 1428 } 1429 1430 static int 1431 midiseq_pgmchange(struct midi_dev *md, int chan, seq_event_t *ev) 1432 { 1433 if (ev->c_PGM_CHANGE.program > 127) 1434 return EINVAL; 1435 return midiseq_out(md, (uint8_t[]){ 1436 MIDI_PGM_CHANGE | chan, ev->c_PGM_CHANGE.program}, 2, 1); 1437 } 1438 1439 static int 1440 midiseq_chnpressure(struct midi_dev *md, int chan, seq_event_t *ev) 1441 { 1442 if (ev->c_CHN_PRESSURE.pressure > 127) 1443 return EINVAL; 1444 return midiseq_out(md, (uint8_t[]){ 1445 MIDI_CHN_PRESSURE | chan, ev->c_CHN_PRESSURE.pressure}, 2, 1); 1446 } 1447 1448 static int 1449 midiseq_ctlchange(struct midi_dev *md, int chan, seq_event_t *ev) 1450 { 1451 if (ev->c_CTL_CHANGE.controller > 127) 1452 return EINVAL; 1453 return midiseq_out( md, (uint8_t[]){ 1454 MIDI_CTL_CHANGE | chan, ev->c_CTL_CHANGE.controller, 1455 ev->c_CTL_CHANGE.value & 0x7f /* XXX this is SO wrong */ 1456 }, 3, 1); 1457 } 1458 1459 static int 1460 midiseq_pitchbend(struct midi_dev *md, int chan, seq_event_t *ev) 1461 { 1462 return midiseq_out(md, (uint8_t[]){ 1463 MIDI_PITCH_BEND | chan, 1464 ev->c_PITCH_BEND.value & 0x7f, 1465 (ev->c_PITCH_BEND.value >> 7) & 0x7f}, 3, 1); 1466 } 1467 1468 static int 1469 midiseq_loadpatch(struct midi_dev *md, 1470 struct sysex_info *sysex, struct uio *uio) 1471 { 1472 struct sequencer_softc *sc; 1473 u_char c, bf[128]; 1474 int i, cc, error; 1475 1476 if (sysex->key != SEQ_SYSEX_PATCH) { 1477 DPRINTFN(-1,("midiseq_loadpatch: bad patch key 0x%04x\n", 1478 sysex->key)); 1479 return (EINVAL); 1480 } 1481 if (uio->uio_resid < sysex->len) 1482 /* adjust length, should be an error */ 1483 sysex->len = uio->uio_resid; 1484 1485 DPRINTFN(2, ("midiseq_loadpatch: len=%d\n", sysex->len)); 1486 if (sysex->len == 0) 1487 return EINVAL; 1488 error = uiomove(&c, 1, uio); 1489 if (error) 1490 return error; 1491 if (c != MIDI_SYSEX_START) /* must start like this */ 1492 return EINVAL; 1493 sc = md->seq; 1494 mutex_enter(&sc->lock); 1495 error = midiseq_out(md, &c, 1, 0); 1496 mutex_exit(&sc->lock); 1497 if (error) 1498 return error; 1499 --sysex->len; 1500 while (sysex->len > 0) { 1501 cc = sysex->len; 1502 if (cc > sizeof bf) 1503 cc = sizeof bf; 1504 error = uiomove(bf, cc, uio); 1505 if (error) 1506 break; 1507 for(i = 0; i < cc && !MIDI_IS_STATUS(bf[i]); i++) 1508 ; 1509 /* 1510 * XXX midi(4)'s buffer might not accommodate this, and the 1511 * function will not block us (though in this case we have 1512 * a process and could in principle block). 1513 */ 1514 mutex_enter(&sc->lock); 1515 error = midiseq_out(md, bf, i, 0); 1516 mutex_exit(&sc->lock); 1517 if (error) 1518 break; 1519 sysex->len -= i; 1520 if (i != cc) 1521 break; 1522 } 1523 /* 1524 * Any leftover data in uio is rubbish; 1525 * the SYSEX should be one write ending in SYSEX_END. 1526 */ 1527 uio->uio_resid = 0; 1528 c = MIDI_SYSEX_END; 1529 mutex_enter(&sc->lock); 1530 error = midiseq_out(md, &c, 1, 0); 1531 mutex_exit(&sc->lock); 1532 return error; 1533 } 1534 1535 #include "midi.h" 1536 #if NMIDI == 0 1537 static dev_type_open(midiopen); 1538 static dev_type_close(midiclose); 1539 1540 const struct cdevsw midi_cdevsw = { 1541 midiopen, midiclose, noread, nowrite, noioctl, 1542 nostop, notty, nopoll, nommap, nokqfilter, D_OTHER | D_MPSAFE 1543 }; 1544 1545 /* 1546 * If someone has a sequencer, but no midi devices there will 1547 * be unresolved references, so we provide little stubs. 1548 */ 1549 1550 int 1551 midi_unit_count(void) 1552 { 1553 return (0); 1554 } 1555 1556 static int 1557 midiopen(dev_t dev, int flags, int ifmt, struct lwp *l) 1558 { 1559 return (ENXIO); 1560 } 1561 1562 struct cfdriver midi_cd; 1563 1564 void 1565 midi_getinfo(dev_t dev, struct midi_info *mi) 1566 { 1567 mi->name = "Dummy MIDI device"; 1568 mi->props = 0; 1569 } 1570 1571 static int 1572 midiclose(dev_t dev, int flags, int ifmt, struct lwp *l) 1573 { 1574 return (ENXIO); 1575 } 1576 1577 int 1578 midi_writebytes(int unit, u_char *bf, int cc) 1579 { 1580 return (ENXIO); 1581 } 1582 #endif /* NMIDI == 0 */ 1583