1 /* $NetBSD: sequencer.c,v 1.54 2012/02/13 01:47:16 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (augustss@NetBSD.org) and by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Locking: 34 * 35 * o sc_lock: provides atomic access to all data structures. Taken from 36 * both process and soft interrupt context. 37 * 38 * o sc_dvlock: serializes operations on /dev/sequencer. Taken from 39 * process context. Dropped while waiting for data in sequencerread() 40 * to allow concurrent reads/writes while no data available. 41 * 42 * o sc_isopen: we allow only one concurrent open, only to prevent user 43 * and/or application error. 44 * 45 * o MIDI softc locks. These can be spinlocks and there can be many of 46 * them, because we can open many MIDI devices. We take these only in two 47 * places: when enabling redirection from the MIDI device and when 48 * disabling it (open/close). midiseq_in() is called by the MIDI driver 49 * with its own lock held when passing data into this module. To avoid 50 * lock order and context problems, we package the received message as a 51 * sequencer_pcqitem_t and put onto a producer-consumer queue. A soft 52 * interrupt is scheduled to dequeue and decode the message later where we 53 * can safely acquire the sequencer device's sc_lock. PCQ is lockless for 54 * multiple producer, single consumer settings like this one. 55 */ 56 57 #include <sys/cdefs.h> 58 __KERNEL_RCSID(0, "$NetBSD: sequencer.c,v 1.54 2012/02/13 01:47:16 mrg Exp $"); 59 60 #include "sequencer.h" 61 62 #include <sys/param.h> 63 #include <sys/ioctl.h> 64 #include <sys/fcntl.h> 65 #include <sys/vnode.h> 66 #include <sys/select.h> 67 #include <sys/poll.h> 68 #include <sys/kmem.h> 69 #include <sys/proc.h> 70 #include <sys/systm.h> 71 #include <sys/syslog.h> 72 #include <sys/kernel.h> 73 #include <sys/signalvar.h> 74 #include <sys/conf.h> 75 #include <sys/audioio.h> 76 #include <sys/midiio.h> 77 #include <sys/device.h> 78 #include <sys/intr.h> 79 #include <sys/atomic.h> 80 #include <sys/pcq.h> 81 #include <sys/vnode.h> 82 #include <sys/kauth.h> 83 84 #include <dev/midi_if.h> 85 #include <dev/midivar.h> 86 #include <dev/sequencervar.h> 87 88 #define ADDTIMEVAL(a, b) ( \ 89 (a)->tv_sec += (b)->tv_sec, \ 90 (a)->tv_usec += (b)->tv_usec, \ 91 (a)->tv_usec > 1000000 ? ((a)->tv_sec++, (a)->tv_usec -= 1000000) : 0\ 92 ) 93 94 #define SUBTIMEVAL(a, b) ( \ 95 (a)->tv_sec -= (b)->tv_sec, \ 96 (a)->tv_usec -= (b)->tv_usec, \ 97 (a)->tv_usec < 0 ? ((a)->tv_sec--, (a)->tv_usec += 1000000) : 0\ 98 ) 99 100 #ifdef AUDIO_DEBUG 101 #define DPRINTF(x) if (sequencerdebug) printf x 102 #define DPRINTFN(n,x) if (sequencerdebug >= (n)) printf x 103 int sequencerdebug = 0; 104 #else 105 #define DPRINTF(x) 106 #define DPRINTFN(n,x) 107 #endif 108 109 #define SEQ_NOTE_MAX 128 110 #define SEQ_NOTE_XXX 255 111 112 #define RECALC_USPERDIV(t) \ 113 ((t)->usperdiv = 60*1000000L/((t)->tempo_beatpermin*(t)->timebase_divperbeat)) 114 115 typedef union sequencer_pcqitem { 116 void *qi_ptr; 117 char qi_msg[4]; 118 } sequencer_pcqitem_t; 119 120 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 struct midi_softc; 140 static int midiseq_out(struct midi_dev *, u_char *, u_int, int); 141 static struct midi_dev *midiseq_open(int, int); 142 static void midiseq_close(struct midi_dev *); 143 static void midiseq_reset(struct midi_dev *); 144 static int midiseq_noteon(struct midi_dev *, int, int, seq_event_t *); 145 static int midiseq_noteoff(struct midi_dev *, int, int, seq_event_t *); 146 static int midiseq_keypressure(struct midi_dev *, int, int, seq_event_t *); 147 static int midiseq_pgmchange(struct midi_dev *, int, seq_event_t *); 148 static int midiseq_chnpressure(struct midi_dev *, int, seq_event_t *); 149 static int midiseq_ctlchange(struct midi_dev *, int, seq_event_t *); 150 static int midiseq_pitchbend(struct midi_dev *, int, seq_event_t *); 151 static int midiseq_loadpatch(struct midi_dev *, struct sysex_info *, struct uio *); 152 void midiseq_in(struct midi_dev *, u_char *, int); 153 154 static dev_type_open(sequenceropen); 155 static dev_type_close(sequencerclose); 156 static dev_type_read(sequencerread); 157 static dev_type_write(sequencerwrite); 158 static dev_type_ioctl(sequencerioctl); 159 static dev_type_poll(sequencerpoll); 160 static dev_type_kqfilter(sequencerkqfilter); 161 162 const struct cdevsw sequencer_cdevsw = { 163 sequenceropen, sequencerclose, sequencerread, sequencerwrite, 164 sequencerioctl, nostop, notty, sequencerpoll, nommap, 165 sequencerkqfilter, D_OTHER | D_MPSAFE 166 }; 167 168 void 169 sequencerattach(int n) 170 { 171 struct sequencer_softc *sc; 172 173 for (n = 0; n < NSEQUENCER; n++) { 174 sc = &seqdevs[n]; 175 callout_init(&sc->sc_callout, CALLOUT_MPSAFE); 176 sc->sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 177 seq_softintr, sc); 178 mutex_init(&sc->lock, MUTEX_DEFAULT, IPL_NONE); 179 cv_init(&sc->rchan, "midiseqr"); 180 cv_init(&sc->wchan, "midiseqw"); 181 cv_init(&sc->lchan, "midiseql"); 182 sc->pcq = pcq_create(SEQ_MAXQ, KM_SLEEP); 183 if (sc->pcq == NULL) { 184 panic("sequencerattach"); 185 } 186 } 187 } 188 189 /* 190 * Release reference to device acquired with sequencer_enter(). 191 */ 192 static void 193 sequencer_exit(struct sequencer_softc *sc) 194 { 195 196 sc->dvlock--; 197 cv_broadcast(&sc->lchan); 198 mutex_exit(&sc->lock); 199 } 200 201 /* 202 * Look up sequencer device and acquire locks for device access. 203 */ 204 static int 205 sequencer_enter(dev_t dev, struct sequencer_softc **scp) 206 { 207 struct sequencer_softc *sc; 208 int unit; 209 210 /* First, find the device and take sc_lock. */ 211 unit = SEQUENCERUNIT(dev); 212 if (unit >= NSEQUENCER) 213 return (ENXIO); 214 sc = &seqdevs[unit]; 215 if (sc == NULL) 216 return ENXIO; 217 mutex_enter(&sc->lock); 218 while (sc->dvlock) { 219 cv_wait(&sc->lchan, &sc->lock); 220 } 221 sc->dvlock++; 222 if (sc->dying) { 223 sequencer_exit(sc); 224 return EIO; 225 } 226 *scp = sc; 227 return 0; 228 } 229 230 static int 231 sequenceropen(dev_t dev, int flags, int ifmt, struct lwp *l) 232 { 233 int unit = SEQUENCERUNIT(dev); 234 struct sequencer_softc *sc; 235 struct midi_dev *md; 236 struct midi_softc *msc; 237 int error; 238 239 DPRINTF(("sequenceropen\n")); 240 241 if ((error = sequencer_enter(dev, &sc)) != 0) 242 return error; 243 KASSERT(sc == &seqdevs[unit]); 244 if (sc->isopen != 0) { 245 sequencer_exit(sc); 246 return EBUSY; 247 } 248 249 if (SEQ_IS_OLD(unit)) 250 sc->mode = SEQ_OLD; 251 else 252 sc->mode = SEQ_NEW; 253 sc->isopen++; 254 sc->flags = flags & (FREAD|FWRITE); 255 sc->pbus = 0; 256 sc->async = 0; 257 sc->input_stamp = ~0; 258 259 sc->nmidi = 0; 260 sc->ndevs = midi_unit_count(); 261 sc->timer.timebase_divperbeat = 100; 262 sc->timer.tempo_beatpermin = 60; 263 RECALC_USPERDIV(&sc->timer); 264 sc->timer.divs_lastevent = sc->timer.divs_lastchange = 0; 265 microtime(&sc->timer.reftime); 266 267 SEQ_QINIT(&sc->inq); 268 SEQ_QINIT(&sc->outq); 269 sc->lowat = SEQ_MAXQ / 2; 270 271 if (sc->ndevs > 0) { 272 mutex_exit(&sc->lock); 273 sc->devs = kmem_alloc(sc->ndevs * sizeof(struct midi_dev *), 274 KM_SLEEP); 275 for (unit = 0; unit < sc->ndevs; unit++) { 276 md = midiseq_open(unit, flags); 277 if (md) { 278 sc->devs[sc->nmidi++] = md; 279 md->seq = sc; 280 md->doingsysex = 0; 281 } 282 } 283 mutex_enter(&sc->lock); 284 } else { 285 sc->devs = NULL; 286 } 287 288 /* Only now redirect input from MIDI devices. */ 289 for (unit = 0; unit < sc->nmidi; unit++) { 290 msc = sc->devs[unit]->msc; 291 mutex_enter(msc->lock); 292 msc->seqopen = 1; 293 mutex_exit(msc->lock); 294 } 295 296 seq_reset(sc); 297 sequencer_exit(sc); 298 299 DPRINTF(("%s: mode=%d, nmidi=%d\n", __func__, sc->mode, sc->nmidi)); 300 return 0; 301 } 302 303 static int 304 seq_drain(struct sequencer_softc *sc) 305 { 306 int error; 307 308 KASSERT(mutex_owned(&sc->lock)); 309 310 DPRINTFN(3, ("seq_drain: %p, len=%d\n", sc, SEQ_QLEN(&sc->outq))); 311 seq_startoutput(sc); 312 error = 0; 313 while (!SEQ_QEMPTY(&sc->outq) && !error) 314 error = cv_timedwait_sig(&sc->wchan, &sc->lock, 60*hz); 315 return (error); 316 } 317 318 static void 319 seq_timeout(void *addr) 320 { 321 struct sequencer_softc *sc = addr; 322 proc_t *p; 323 pid_t pid; 324 325 DPRINTFN(4, ("seq_timeout: %p\n", sc)); 326 327 mutex_enter(&sc->lock); 328 if (sc->timeout == 0) { 329 mutex_spin_exit(&sc->lock); 330 return; 331 } 332 sc->timeout = 0; 333 seq_startoutput(sc); 334 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 335 mutex_exit(&sc->lock); 336 return; 337 } 338 cv_broadcast(&sc->wchan); 339 selnotify(&sc->wsel, 0, NOTE_SUBMIT); 340 if ((pid = sc->async) != 0) { 341 mutex_enter(proc_lock); 342 if ((p = proc_find(pid)) != NULL) 343 psignal(p, SIGIO); 344 mutex_exit(proc_lock); 345 } 346 mutex_exit(&sc->lock); 347 } 348 349 static void 350 seq_startoutput(struct sequencer_softc *sc) 351 { 352 struct sequencer_queue *q = &sc->outq; 353 seq_event_t cmd; 354 355 KASSERT(mutex_owned(&sc->lock)); 356 357 if (sc->timeout) 358 return; 359 DPRINTFN(4, ("seq_startoutput: %p, len=%d\n", sc, SEQ_QLEN(q))); 360 while (!SEQ_QEMPTY(q) && !sc->timeout) { 361 SEQ_QGET(q, cmd); 362 seq_do_command(sc, &cmd); 363 } 364 } 365 366 static int 367 sequencerclose(dev_t dev, int flags, int ifmt, struct lwp *l) 368 { 369 struct sequencer_softc *sc; 370 struct midi_softc *msc; 371 int unit, error; 372 373 DPRINTF(("sequencerclose: %"PRIx64"\n", dev)); 374 375 if ((error = sequencer_enter(dev, &sc)) != 0) 376 return error; 377 seq_drain(sc); 378 if (sc->timeout) { 379 callout_halt(&sc->sc_callout, &sc->lock); 380 sc->timeout = 0; 381 } 382 /* Bin input from MIDI devices. */ 383 for (unit = 0; unit < sc->nmidi; unit++) { 384 msc = sc->devs[unit]->msc; 385 mutex_enter(msc->lock); 386 msc->seqopen = 0; 387 mutex_exit(msc->lock); 388 } 389 mutex_exit(&sc->lock); 390 391 for (unit = 0; unit < sc->nmidi; unit++) 392 if (sc->devs[unit] != NULL) 393 midiseq_close(sc->devs[unit]); 394 if (sc->devs != NULL) { 395 KASSERT(sc->ndevs > 0); 396 kmem_free(sc->devs, sc->ndevs * sizeof(struct midi_dev *)); 397 sc->devs = NULL; 398 } 399 400 mutex_enter(&sc->lock); 401 sc->isopen = 0; 402 sequencer_exit(sc); 403 404 DPRINTF(("sequencerclose: %"PRIx64" done\n", dev)); 405 406 return (0); 407 } 408 409 static int 410 seq_input_event(struct sequencer_softc *sc, seq_event_t *cmd) 411 { 412 struct sequencer_queue *q; 413 414 KASSERT(mutex_owned(&sc->lock)); 415 416 DPRINTFN(2, ("seq_input_event: %02x %02x %02x %02x %02x " 417 "%02x %02x %02x\n", cmd->tag, 418 cmd->unknown.byte[0], cmd->unknown.byte[1], 419 cmd->unknown.byte[2], cmd->unknown.byte[3], 420 cmd->unknown.byte[4], cmd->unknown.byte[5], 421 cmd->unknown.byte[6])); 422 q = &sc->inq; 423 if (SEQ_QFULL(q)) 424 return (ENOMEM); 425 SEQ_QPUT(q, *cmd); 426 cv_broadcast(&sc->rchan); 427 selnotify(&sc->rsel, 0, NOTE_SUBMIT); 428 if (sc->async != 0) { 429 proc_t *p; 430 431 mutex_enter(proc_lock); 432 if ((p = proc_find(sc->async)) != NULL) 433 psignal(p, SIGIO); 434 mutex_exit(proc_lock); 435 } 436 return 0; 437 } 438 439 static void 440 seq_softintr(void *addr) 441 { 442 struct sequencer_softc *sc; 443 struct timeval now; 444 seq_event_t ev; 445 int status, chan, unit; 446 sequencer_pcqitem_t qi; 447 u_long t; 448 449 sc = addr; 450 451 mutex_enter(&sc->lock); 452 453 qi.qi_ptr = pcq_get(sc->pcq); 454 if (qi.qi_ptr == NULL) { 455 mutex_exit(&sc->lock); 456 return; 457 } 458 KASSERT((qi.qi_msg[3] & 0x80) != 0); 459 unit = qi.qi_msg[3] & ~0x80; 460 status = MIDI_GET_STATUS(qi.qi_msg[0]); 461 chan = MIDI_GET_CHAN(qi.qi_msg[0]); 462 switch (status) { 463 case MIDI_NOTEON: /* midi(4) always canonicalizes hidden note-off */ 464 ev = SEQ_MK_CHN(NOTEON, .device=unit, .channel=chan, 465 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 466 break; 467 case MIDI_NOTEOFF: 468 ev = SEQ_MK_CHN(NOTEOFF, .device=unit, .channel=chan, 469 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 470 break; 471 case MIDI_KEY_PRESSURE: 472 ev = SEQ_MK_CHN(KEY_PRESSURE, .device=unit, .channel=chan, 473 .key=qi.qi_msg[1], .pressure=qi.qi_msg[2]); 474 break; 475 case MIDI_CTL_CHANGE: /* XXX not correct for MSB */ 476 ev = SEQ_MK_CHN(CTL_CHANGE, .device=unit, .channel=chan, 477 .controller=qi.qi_msg[1], .value=qi.qi_msg[2]); 478 break; 479 case MIDI_PGM_CHANGE: 480 ev = SEQ_MK_CHN(PGM_CHANGE, .device=unit, .channel=chan, 481 .program=qi.qi_msg[1]); 482 break; 483 case MIDI_CHN_PRESSURE: 484 ev = SEQ_MK_CHN(CHN_PRESSURE, .device=unit, .channel=chan, 485 .pressure=qi.qi_msg[1]); 486 break; 487 case MIDI_PITCH_BEND: 488 ev = SEQ_MK_CHN(PITCH_BEND, .device=unit, .channel=chan, 489 .value=(qi.qi_msg[1] & 0x7f) | ((qi.qi_msg[2] & 0x7f) << 7)); 490 break; 491 default: /* this is now the point where MIDI_ACKs disappear */ 492 mutex_exit(&sc->lock); 493 return; 494 } 495 microtime(&now); 496 if (!sc->timer.running) 497 now = sc->timer.stoptime; 498 SUBTIMEVAL(&now, &sc->timer.reftime); 499 t = now.tv_sec * 1000000 + now.tv_usec; 500 t /= sc->timer.usperdiv; 501 t += sc->timer.divs_lastchange; 502 if (t != sc->input_stamp) { 503 seq_input_event(sc, &SEQ_MK_TIMING(WAIT_ABS, .divisions=t)); 504 sc->input_stamp = t; /* XXX wha hoppen if timer is reset? */ 505 } 506 seq_input_event(sc, &ev); 507 mutex_exit(&sc->lock); 508 } 509 510 static int 511 sequencerread(dev_t dev, struct uio *uio, int ioflag) 512 { 513 struct sequencer_softc *sc; 514 struct sequencer_queue *q; 515 seq_event_t ev; 516 int error; 517 518 DPRINTFN(20, ("sequencerread: %"PRIx64", count=%d, ioflag=%x\n", 519 dev, (int)uio->uio_resid, ioflag)); 520 521 if ((error = sequencer_enter(dev, &sc)) != 0) 522 return error; 523 q = &sc->inq; 524 525 if (sc->mode == SEQ_OLD) { 526 sequencer_exit(sc); 527 DPRINTFN(-1,("sequencerread: old read\n")); 528 return EINVAL; /* XXX unimplemented */ 529 } 530 while (SEQ_QEMPTY(q)) { 531 if (ioflag & IO_NDELAY) { 532 error = EWOULDBLOCK; 533 break; 534 } 535 /* Drop lock to allow concurrent read/write. */ 536 KASSERT(sc->dvlock != 0); 537 sc->dvlock--; 538 error = cv_wait_sig(&sc->rchan, &sc->lock); 539 while (sc->dvlock != 0) { 540 cv_wait(&sc->lchan, &sc->lock); 541 } 542 sc->dvlock++; 543 if (error) { 544 break; 545 } 546 } 547 while (uio->uio_resid >= sizeof(ev) && !error && !SEQ_QEMPTY(q)) { 548 SEQ_QGET(q, ev); 549 mutex_exit(&sc->lock); 550 error = uiomove(&ev, sizeof(ev), uio); 551 mutex_enter(&sc->lock); 552 } 553 sequencer_exit(sc); 554 return error; 555 } 556 557 static int 558 sequencerwrite(dev_t dev, struct uio *uio, int ioflag) 559 { 560 struct sequencer_softc *sc; 561 struct sequencer_queue *q; 562 int error; 563 seq_event_t cmdbuf; 564 int size; 565 566 DPRINTFN(2, ("sequencerwrite: %"PRIx64", count=%d\n", dev, 567 (int)uio->uio_resid)); 568 569 if ((error = sequencer_enter(dev, &sc)) != 0) 570 return error; 571 q = &sc->outq; 572 573 size = sc->mode == SEQ_NEW ? sizeof cmdbuf : SEQOLD_CMDSIZE; 574 while (uio->uio_resid >= size && error == 0) { 575 mutex_exit(&sc->lock); 576 error = uiomove(&cmdbuf, size, uio); 577 if (error == 0) { 578 if (sc->mode == SEQ_OLD && seq_to_new(&cmdbuf, uio)) { 579 mutex_enter(&sc->lock); 580 continue; 581 } 582 if (cmdbuf.tag == SEQ_FULLSIZE) { 583 /* We do it like OSS does, asynchronously */ 584 error = seq_do_fullsize(sc, &cmdbuf, uio); 585 if (error == 0) { 586 mutex_enter(&sc->lock); 587 continue; 588 } 589 } 590 } 591 mutex_enter(&sc->lock); 592 if (error != 0) { 593 break; 594 } 595 while (SEQ_QFULL(q)) { 596 seq_startoutput(sc); 597 if (SEQ_QFULL(q)) { 598 if (ioflag & IO_NDELAY) { 599 error = EWOULDBLOCK; 600 break; 601 } 602 error = cv_wait_sig(&sc->wchan, &sc->lock); 603 if (error) { 604 break; 605 } 606 } 607 } 608 if (error == 0) { 609 SEQ_QPUT(q, cmdbuf); 610 } 611 } 612 if (error == 0) { 613 seq_startoutput(sc); 614 } else { 615 DPRINTFN(2, ("sequencerwrite: error=%d\n", error)); 616 } 617 sequencer_exit(sc); 618 return error; 619 } 620 621 static int 622 sequencerioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 623 { 624 struct sequencer_softc *sc; 625 struct synth_info *si; 626 struct midi_dev *md; 627 int devno, error, t; 628 struct timeval now; 629 u_long tx; 630 631 DPRINTFN(2, ("sequencerioctl: %"PRIx64" cmd=0x%08lx\n", dev, cmd)); 632 633 if ((error = sequencer_enter(dev, &sc)) != 0) 634 return error; 635 switch (cmd) { 636 case FIONBIO: 637 /* All handled in the upper FS layer. */ 638 break; 639 640 case FIOASYNC: 641 if (*(int *)addr) { 642 if (sc->async != 0) 643 return EBUSY; 644 sc->async = curproc->p_pid; 645 DPRINTF(("sequencer_ioctl: FIOASYNC %d\n", 646 sc->async)); 647 } else { 648 sc->async = 0; 649 } 650 break; 651 652 case SEQUENCER_RESET: 653 seq_reset(sc); 654 break; 655 656 case SEQUENCER_PANIC: 657 seq_reset(sc); 658 /* Do more? OSS doesn't */ 659 break; 660 661 case SEQUENCER_SYNC: 662 if (sc->flags != FREAD) 663 seq_drain(sc); 664 break; 665 666 case SEQUENCER_INFO: 667 si = (struct synth_info*)addr; 668 devno = si->device; 669 if (devno < 0 || devno >= sc->nmidi) { 670 error = EINVAL; 671 break; 672 } 673 md = sc->devs[devno]; 674 strncpy(si->name, md->name, sizeof si->name); 675 si->synth_type = SYNTH_TYPE_MIDI; 676 si->synth_subtype = md->subtype; 677 si->nr_voices = md->nr_voices; 678 si->instr_bank_size = md->instr_bank_size; 679 si->capabilities = md->capabilities; 680 break; 681 682 case SEQUENCER_NRSYNTHS: 683 *(int *)addr = sc->nmidi; 684 break; 685 686 case SEQUENCER_NRMIDIS: 687 *(int *)addr = sc->nmidi; 688 break; 689 690 case SEQUENCER_OUTOFBAND: 691 DPRINTFN(3, ("sequencer_ioctl: OOB=%02x %02x %02x %02x %02x %02x %02x %02x\n", 692 *(u_char *)addr, *((u_char *)addr+1), 693 *((u_char *)addr+2), *((u_char *)addr+3), 694 *((u_char *)addr+4), *((u_char *)addr+5), 695 *((u_char *)addr+6), *((u_char *)addr+7))); 696 if ((sc->flags & FWRITE) == 0) { 697 error = EBADF; 698 } else { 699 error = seq_do_command(sc, (seq_event_t *)addr); 700 } 701 break; 702 703 case SEQUENCER_TMR_TIMEBASE: 704 t = *(int *)addr; 705 if (t < 1) 706 t = 1; 707 if (t > 10000) 708 t = 10000; 709 *(int *)addr = t; 710 sc->timer.timebase_divperbeat = t; 711 sc->timer.divs_lastchange = sc->timer.divs_lastevent; 712 microtime(&sc->timer.reftime); 713 RECALC_USPERDIV(&sc->timer); 714 break; 715 716 case SEQUENCER_TMR_START: 717 error = seq_do_timing(sc, &SEQ_MK_TIMING(START)); 718 break; 719 720 case SEQUENCER_TMR_STOP: 721 error = seq_do_timing(sc, &SEQ_MK_TIMING(STOP)); 722 break; 723 724 case SEQUENCER_TMR_CONTINUE: 725 error = seq_do_timing(sc, &SEQ_MK_TIMING(CONTINUE)); 726 break; 727 728 case SEQUENCER_TMR_TEMPO: 729 error = seq_do_timing(sc, 730 &SEQ_MK_TIMING(TEMPO, .bpm=*(int *)addr)); 731 if (error == 0) 732 *(int *)addr = sc->timer.tempo_beatpermin; 733 break; 734 735 case SEQUENCER_TMR_SOURCE: 736 *(int *)addr = SEQUENCER_TMR_INTERNAL; 737 break; 738 739 case SEQUENCER_TMR_METRONOME: 740 /* noop */ 741 break; 742 743 case SEQUENCER_THRESHOLD: 744 t = SEQ_MAXQ - *(int *)addr / sizeof (seq_event_rec); 745 if (t < 1) 746 t = 1; 747 if (t > SEQ_MAXQ) 748 t = SEQ_MAXQ; 749 sc->lowat = t; 750 break; 751 752 case SEQUENCER_CTRLRATE: 753 *(int *)addr = (sc->timer.tempo_beatpermin 754 *sc->timer.timebase_divperbeat + 30) / 60; 755 break; 756 757 case SEQUENCER_GETTIME: 758 microtime(&now); 759 SUBTIMEVAL(&now, &sc->timer.reftime); 760 tx = now.tv_sec * 1000000 + now.tv_usec; 761 tx /= sc->timer.usperdiv; 762 tx += sc->timer.divs_lastchange; 763 *(int *)addr = tx; 764 break; 765 766 default: 767 DPRINTFN(-1,("sequencer_ioctl: unimpl %08lx\n", cmd)); 768 error = EINVAL; 769 break; 770 } 771 sequencer_exit(sc); 772 773 return error; 774 } 775 776 static int 777 sequencerpoll(dev_t dev, int events, struct lwp *l) 778 { 779 struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)]; 780 int revents = 0; 781 782 DPRINTF(("sequencerpoll: %p events=0x%x\n", sc, events)); 783 784 mutex_enter(&sc->lock); 785 if (events & (POLLIN | POLLRDNORM)) 786 if ((sc->flags&FREAD) && !SEQ_QEMPTY(&sc->inq)) 787 revents |= events & (POLLIN | POLLRDNORM); 788 789 if (events & (POLLOUT | POLLWRNORM)) 790 if ((sc->flags&FWRITE) && SEQ_QLEN(&sc->outq) < sc->lowat) 791 revents |= events & (POLLOUT | POLLWRNORM); 792 793 if (revents == 0) { 794 if ((sc->flags&FREAD) && (events & (POLLIN | POLLRDNORM))) 795 selrecord(l, &sc->rsel); 796 797 if ((sc->flags&FWRITE) && (events & (POLLOUT | POLLWRNORM))) 798 selrecord(l, &sc->wsel); 799 } 800 mutex_exit(&sc->lock); 801 802 return revents; 803 } 804 805 static void 806 filt_sequencerrdetach(struct knote *kn) 807 { 808 struct sequencer_softc *sc = kn->kn_hook; 809 810 mutex_enter(&sc->lock); 811 SLIST_REMOVE(&sc->rsel.sel_klist, kn, knote, kn_selnext); 812 mutex_exit(&sc->lock); 813 } 814 815 static int 816 filt_sequencerread(struct knote *kn, long hint) 817 { 818 struct sequencer_softc *sc = kn->kn_hook; 819 int rv; 820 821 if (hint != NOTE_SUBMIT) { 822 mutex_enter(&sc->lock); 823 } 824 if (SEQ_QEMPTY(&sc->inq)) { 825 rv = 0; 826 } else { 827 kn->kn_data = sizeof(seq_event_rec); 828 rv = 1; 829 } 830 if (hint != NOTE_SUBMIT) { 831 mutex_exit(&sc->lock); 832 } 833 return rv; 834 } 835 836 static const struct filterops sequencerread_filtops = 837 { 1, NULL, filt_sequencerrdetach, filt_sequencerread }; 838 839 static void 840 filt_sequencerwdetach(struct knote *kn) 841 { 842 struct sequencer_softc *sc = kn->kn_hook; 843 844 mutex_enter(&sc->lock); 845 SLIST_REMOVE(&sc->wsel.sel_klist, kn, knote, kn_selnext); 846 mutex_exit(&sc->lock); 847 } 848 849 static int 850 filt_sequencerwrite(struct knote *kn, long hint) 851 { 852 struct sequencer_softc *sc = kn->kn_hook; 853 int rv; 854 855 if (hint != NOTE_SUBMIT) { 856 mutex_enter(&sc->lock); 857 } 858 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 859 rv = 0; 860 } else { 861 kn->kn_data = sizeof(seq_event_rec); 862 rv = 1; 863 } 864 if (hint != NOTE_SUBMIT) { 865 mutex_exit(&sc->lock); 866 } 867 return rv; 868 } 869 870 static const struct filterops sequencerwrite_filtops = 871 { 1, NULL, filt_sequencerwdetach, filt_sequencerwrite }; 872 873 static int 874 sequencerkqfilter(dev_t dev, struct knote *kn) 875 { 876 struct sequencer_softc *sc = &seqdevs[SEQUENCERUNIT(dev)]; 877 struct klist *klist; 878 879 switch (kn->kn_filter) { 880 case EVFILT_READ: 881 klist = &sc->rsel.sel_klist; 882 kn->kn_fop = &sequencerread_filtops; 883 break; 884 885 case EVFILT_WRITE: 886 klist = &sc->wsel.sel_klist; 887 kn->kn_fop = &sequencerwrite_filtops; 888 break; 889 890 default: 891 return (EINVAL); 892 } 893 894 kn->kn_hook = sc; 895 896 mutex_enter(&sc->lock); 897 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 898 mutex_exit(&sc->lock); 899 900 return (0); 901 } 902 903 static void 904 seq_reset(struct sequencer_softc *sc) 905 { 906 int i, chn; 907 struct midi_dev *md; 908 909 KASSERT(mutex_owned(&sc->lock)); 910 911 if ( !(sc->flags & FWRITE) ) 912 return; 913 for (i = 0; i < sc->nmidi; i++) { 914 md = sc->devs[i]; 915 midiseq_reset(md); 916 for (chn = 0; chn < MAXCHAN; chn++) { 917 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 918 .controller=MIDI_CTRL_NOTES_OFF)); 919 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 920 .controller=MIDI_CTRL_RESET)); 921 midiseq_pitchbend(md, chn, &SEQ_MK_CHN(PITCH_BEND, 922 .value=MIDI_BEND_NEUTRAL)); 923 } 924 } 925 } 926 927 static int 928 seq_do_command(struct sequencer_softc *sc, seq_event_t *b) 929 { 930 int dev; 931 932 KASSERT(mutex_owned(&sc->lock)); 933 934 DPRINTFN(4, ("seq_do_command: %p cmd=0x%02x\n", sc, b->timing.op)); 935 936 switch(b->tag) { 937 case SEQ_LOCAL: 938 return seq_do_local(sc, b); 939 case SEQ_TIMING: 940 return seq_do_timing(sc, b); 941 case SEQ_CHN_VOICE: 942 return seq_do_chnvoice(sc, b); 943 case SEQ_CHN_COMMON: 944 return seq_do_chncommon(sc, b); 945 case SEQ_SYSEX: 946 return seq_do_sysex(sc, b); 947 /* COMPAT */ 948 case SEQOLD_MIDIPUTC: 949 dev = b->putc.device; 950 if (dev < 0 || dev >= sc->nmidi) 951 return (ENXIO); 952 return midiseq_out(sc->devs[dev], &b->putc.byte, 1, 0); 953 default: 954 DPRINTFN(-1,("seq_do_command: unimpl command %02x\n", b->tag)); 955 return (EINVAL); 956 } 957 } 958 959 static int 960 seq_do_chnvoice(struct sequencer_softc *sc, seq_event_t *b) 961 { 962 int dev; 963 int error; 964 struct midi_dev *md; 965 966 KASSERT(mutex_owned(&sc->lock)); 967 968 dev = b->voice.device; 969 if (dev < 0 || dev >= sc->nmidi || 970 b->voice.channel > 15 || 971 b->voice.key >= SEQ_NOTE_MAX) 972 return ENXIO; 973 md = sc->devs[dev]; 974 switch(b->voice.op) { 975 case MIDI_NOTEON: /* no need to special-case hidden noteoff here */ 976 error = midiseq_noteon(md, b->voice.channel, b->voice.key, b); 977 break; 978 case MIDI_NOTEOFF: 979 error = midiseq_noteoff(md, b->voice.channel, b->voice.key, b); 980 break; 981 case MIDI_KEY_PRESSURE: 982 error = midiseq_keypressure(md, 983 b->voice.channel, b->voice.key, b); 984 break; 985 default: 986 DPRINTFN(-1,("seq_do_chnvoice: unimpl command %02x\n", 987 b->voice.op)); 988 error = EINVAL; 989 break; 990 } 991 return error; 992 } 993 994 static int 995 seq_do_chncommon(struct sequencer_softc *sc, seq_event_t *b) 996 { 997 int dev; 998 int error; 999 struct midi_dev *md; 1000 1001 KASSERT(mutex_owned(&sc->lock)); 1002 1003 dev = b->common.device; 1004 if (dev < 0 || dev >= sc->nmidi || 1005 b->common.channel > 15) 1006 return ENXIO; 1007 md = sc->devs[dev]; 1008 DPRINTFN(2,("seq_do_chncommon: %02x\n", b->common.op)); 1009 1010 error = 0; 1011 switch(b->common.op) { 1012 case MIDI_PGM_CHANGE: 1013 error = midiseq_pgmchange(md, b->common.channel, b); 1014 break; 1015 case MIDI_CTL_CHANGE: 1016 error = midiseq_ctlchange(md, b->common.channel, b); 1017 break; 1018 case MIDI_PITCH_BEND: 1019 error = midiseq_pitchbend(md, b->common.channel, b); 1020 break; 1021 case MIDI_CHN_PRESSURE: 1022 error = midiseq_chnpressure(md, b->common.channel, b); 1023 break; 1024 default: 1025 DPRINTFN(-1,("seq_do_chncommon: unimpl command %02x\n", 1026 b->common.op)); 1027 error = EINVAL; 1028 break; 1029 } 1030 return error; 1031 } 1032 1033 static int 1034 seq_do_local(struct sequencer_softc *sc, seq_event_t *b) 1035 { 1036 1037 KASSERT(mutex_owned(&sc->lock)); 1038 1039 return (EINVAL); 1040 } 1041 1042 static int 1043 seq_do_sysex(struct sequencer_softc *sc, seq_event_t *b) 1044 { 1045 int dev, i; 1046 struct midi_dev *md; 1047 uint8_t *bf = b->sysex.buffer; 1048 1049 KASSERT(mutex_owned(&sc->lock)); 1050 1051 dev = b->sysex.device; 1052 if (dev < 0 || dev >= sc->nmidi) 1053 return (ENXIO); 1054 DPRINTF(("seq_do_sysex: dev=%d\n", dev)); 1055 md = sc->devs[dev]; 1056 1057 if (!md->doingsysex) { 1058 midiseq_out(md, (uint8_t[]){MIDI_SYSEX_START}, 1, 0); 1059 md->doingsysex = 1; 1060 } 1061 1062 for (i = 0; i < 6 && bf[i] != 0xff; i++) 1063 ; 1064 midiseq_out(md, bf, i, 0); 1065 if (i < 6 || (i > 0 && bf[i-1] == MIDI_SYSEX_END)) 1066 md->doingsysex = 0; 1067 return 0; 1068 } 1069 1070 static void 1071 seq_timer_waitabs(struct sequencer_softc *sc, uint32_t divs) 1072 { 1073 struct timeval when; 1074 long long usec; 1075 struct syn_timer *t; 1076 int ticks; 1077 1078 KASSERT(mutex_owned(&sc->lock)); 1079 1080 t = &sc->timer; 1081 t->divs_lastevent = divs; 1082 divs -= t->divs_lastchange; 1083 usec = (long long)divs * (long long)t->usperdiv; /* convert to usec */ 1084 when.tv_sec = usec / 1000000; 1085 when.tv_usec = usec % 1000000; 1086 DPRINTFN(4, ("seq_timer_waitabs: adjdivs=%d, sleep when=%"PRId64".%06"PRId64, 1087 divs, when.tv_sec, (uint64_t)when.tv_usec)); 1088 ADDTIMEVAL(&when, &t->reftime); /* abstime for end */ 1089 ticks = tvhzto(&when); 1090 DPRINTFN(4, (" when+start=%"PRId64".%06"PRId64", tick=%d\n", 1091 when.tv_sec, (uint64_t)when.tv_usec, ticks)); 1092 if (ticks > 0) { 1093 #ifdef DIAGNOSTIC 1094 if (ticks > 20 * hz) { 1095 /* Waiting more than 20s */ 1096 printf("seq_timer_waitabs: funny ticks=%d, " 1097 "usec=%lld\n", ticks, usec); 1098 } 1099 #endif 1100 sc->timeout = 1; 1101 callout_reset(&sc->sc_callout, ticks, 1102 seq_timeout, sc); 1103 } 1104 #ifdef SEQUENCER_DEBUG 1105 else if (tick < 0) 1106 DPRINTF(("seq_timer_waitabs: ticks = %d\n", ticks)); 1107 #endif 1108 } 1109 1110 static int 1111 seq_do_timing(struct sequencer_softc *sc, seq_event_t *b) 1112 { 1113 struct syn_timer *t = &sc->timer; 1114 struct timeval when; 1115 int error; 1116 1117 KASSERT(mutex_owned(&sc->lock)); 1118 1119 error = 0; 1120 switch(b->timing.op) { 1121 case TMR_WAIT_REL: 1122 seq_timer_waitabs(sc, 1123 b->t_WAIT_REL.divisions + t->divs_lastevent); 1124 break; 1125 case TMR_WAIT_ABS: 1126 seq_timer_waitabs(sc, b->t_WAIT_ABS.divisions); 1127 break; 1128 case TMR_START: 1129 microtime(&t->reftime); 1130 t->divs_lastevent = t->divs_lastchange = 0; 1131 t->running = 1; 1132 break; 1133 case TMR_STOP: 1134 microtime(&t->stoptime); 1135 t->running = 0; 1136 break; 1137 case TMR_CONTINUE: 1138 if (t->running) 1139 break; 1140 microtime(&when); 1141 SUBTIMEVAL(&when, &t->stoptime); 1142 ADDTIMEVAL(&t->reftime, &when); 1143 t->running = 1; 1144 break; 1145 case TMR_TEMPO: 1146 /* bpm is unambiguously MIDI clocks per minute / 24 */ 1147 /* (24 MIDI clocks are usually but not always a quarter note) */ 1148 if (b->t_TEMPO.bpm < 8) /* where are these limits specified? */ 1149 t->tempo_beatpermin = 8; 1150 else if (b->t_TEMPO.bpm > 360) /* ? */ 1151 t->tempo_beatpermin = 360; 1152 else 1153 t->tempo_beatpermin = b->t_TEMPO.bpm; 1154 t->divs_lastchange = t->divs_lastevent; 1155 microtime(&t->reftime); 1156 RECALC_USPERDIV(t); 1157 break; 1158 case TMR_ECHO: 1159 error = seq_input_event(sc, b); 1160 break; 1161 case TMR_RESET: 1162 t->divs_lastevent = t->divs_lastchange = 0; 1163 microtime(&t->reftime); 1164 break; 1165 case TMR_SPP: 1166 case TMR_TIMESIG: 1167 DPRINTF(("seq_do_timing: unimplemented %02x\n", b->timing.op)); 1168 error = EINVAL; /* not quite accurate... */ 1169 break; 1170 default: 1171 DPRINTF(("seq_timer: unknown %02x\n", b->timing.op)); 1172 error = EINVAL; 1173 break; 1174 } 1175 return (error); 1176 } 1177 1178 static int 1179 seq_do_fullsize(struct sequencer_softc *sc, seq_event_t *b, struct uio *uio) 1180 { 1181 struct sysex_info sysex; 1182 u_int dev; 1183 1184 #ifdef DIAGNOSTIC 1185 if (sizeof(seq_event_rec) != SEQ_SYSEX_HDRSIZE) { 1186 printf("seq_do_fullsize: sysex size ??\n"); 1187 return EINVAL; 1188 } 1189 #endif 1190 memcpy(&sysex, b, sizeof sysex); 1191 dev = sysex.device_no; 1192 if (/* dev < 0 || */ dev >= sc->nmidi) 1193 return (ENXIO); 1194 DPRINTFN(2, ("seq_do_fullsize: fmt=%04x, dev=%d, len=%d\n", 1195 sysex.key, dev, sysex.len)); 1196 return (midiseq_loadpatch(sc->devs[dev], &sysex, uio)); 1197 } 1198 1199 /* 1200 * Convert an old sequencer event to a new one. 1201 * NOTE: on entry, *ev may contain valid data only in the first 4 bytes. 1202 * That may be true even on exit (!) in the case of SEQOLD_MIDIPUTC; the 1203 * caller will only look at the first bytes in that case anyway. Ugly? Sure. 1204 */ 1205 static int 1206 seq_to_new(seq_event_t *ev, struct uio *uio) 1207 { 1208 int cmd, chan, note, parm; 1209 uint32_t tmp_delay; 1210 int error; 1211 uint8_t *bfp; 1212 1213 cmd = ev->tag; 1214 bfp = ev->unknown.byte; 1215 chan = *bfp++; 1216 note = *bfp++; 1217 parm = *bfp++; 1218 DPRINTFN(3, ("seq_to_new: 0x%02x %d %d %d\n", cmd, chan, note, parm)); 1219 1220 if (cmd >= 0x80) { 1221 /* Fill the event record */ 1222 if (uio->uio_resid >= sizeof *ev - SEQOLD_CMDSIZE) { 1223 error = uiomove(bfp, sizeof *ev - SEQOLD_CMDSIZE, uio); 1224 if (error) 1225 return error; 1226 } else 1227 return EINVAL; 1228 } 1229 1230 switch(cmd) { 1231 case SEQOLD_NOTEOFF: 1232 /* 1233 * What's with the SEQ_NOTE_XXX? In OSS this seems to have 1234 * been undocumented magic for messing with the overall volume 1235 * of a 'voice', equated precariously with 'channel' and 1236 * pretty much unimplementable except by directly frobbing a 1237 * synth chip. For us, who treat everything as interfaced over 1238 * MIDI, this will just be unceremoniously discarded as 1239 * invalid in midiseq_noteoff, making the whole event an 1240 * elaborate no-op, and that doesn't seem to be any different 1241 * from what happens on linux with a MIDI-interfaced device, 1242 * by the way. The moral is ... use the new /dev/music API, ok? 1243 */ 1244 *ev = SEQ_MK_CHN(NOTEOFF, .device=0, .channel=chan, 1245 .key=SEQ_NOTE_XXX, .velocity=parm); 1246 break; 1247 case SEQOLD_NOTEON: 1248 *ev = SEQ_MK_CHN(NOTEON, 1249 .device=0, .channel=chan, .key=note, .velocity=parm); 1250 break; 1251 case SEQOLD_WAIT: 1252 /* 1253 * This event cannot even /exist/ on non-littleendian machines, 1254 * and so help me, that's exactly the way OSS defined it. 1255 * Also, the OSS programmer's guide states (p. 74, v1.11) 1256 * that seqold time units are system clock ticks, unlike 1257 * the new 'divisions' which are determined by timebase. In 1258 * that case we would need to do scaling here - but no such 1259 * behavior is visible in linux either--which also treats this 1260 * value, surprisingly, as an absolute, not relative, time. 1261 * My guess is that this event has gone unused so long that 1262 * nobody could agree we got it wrong no matter what we do. 1263 */ 1264 tmp_delay = *(uint32_t *)ev >> 8; 1265 *ev = SEQ_MK_TIMING(WAIT_ABS, .divisions=tmp_delay); 1266 break; 1267 case SEQOLD_SYNCTIMER: 1268 /* 1269 * The TMR_RESET event is not defined in any OSS materials 1270 * I can find; it may have been invented here just to provide 1271 * an accurate _to_new translation of this event. 1272 */ 1273 *ev = SEQ_MK_TIMING(RESET); 1274 break; 1275 case SEQOLD_PGMCHANGE: 1276 *ev = SEQ_MK_CHN(PGM_CHANGE, 1277 .device=0, .channel=chan, .program=note); 1278 break; 1279 case SEQOLD_MIDIPUTC: 1280 break; /* interpret in normal mode */ 1281 case SEQOLD_ECHO: 1282 case SEQOLD_PRIVATE: 1283 case SEQOLD_EXTENDED: 1284 default: 1285 DPRINTF(("seq_to_new: not impl 0x%02x\n", cmd)); 1286 return EINVAL; 1287 /* In case new-style events show up */ 1288 case SEQ_TIMING: 1289 case SEQ_CHN_VOICE: 1290 case SEQ_CHN_COMMON: 1291 case SEQ_FULLSIZE: 1292 break; 1293 } 1294 return 0; 1295 } 1296 1297 /**********************************************/ 1298 1299 void 1300 midiseq_in(struct midi_dev *md, u_char *msg, int len) 1301 { 1302 struct sequencer_softc *sc; 1303 sequencer_pcqitem_t qi; 1304 1305 DPRINTFN(2, ("midiseq_in: %p %02x %02x %02x\n", 1306 md, msg[0], msg[1], msg[2])); 1307 1308 sc = md->seq; 1309 1310 qi.qi_msg[0] = msg[0]; 1311 qi.qi_msg[1] = msg[1]; 1312 qi.qi_msg[2] = msg[2]; 1313 qi.qi_msg[3] = md->unit | 0x80; /* ensure non-zero value of qi_ptr */ 1314 pcq_put(sc->pcq, qi.qi_ptr); 1315 softint_schedule(sc->sih); 1316 } 1317 1318 static struct midi_dev * 1319 midiseq_open(int unit, int flags) 1320 { 1321 extern struct cfdriver midi_cd; 1322 int error; 1323 struct midi_dev *md; 1324 struct midi_softc *sc; 1325 struct midi_info mi; 1326 int major; 1327 dev_t dev; 1328 vnode_t *vp; 1329 int oflags; 1330 1331 major = devsw_name2chr("midi", NULL, 0); 1332 dev = makedev(major, unit); 1333 1334 DPRINTFN(2, ("midiseq_open: %d %d\n", unit, flags)); 1335 1336 error = cdevvp(dev, &vp); 1337 if (error) 1338 return NULL; 1339 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1340 error = VOP_OPEN(vp, flags, kauth_cred_get()); 1341 VOP_UNLOCK(vp); 1342 if (error) { 1343 vrele(vp); 1344 return NULL; 1345 } 1346 1347 /* Only after we have acquired reference via VOP_OPEN(). */ 1348 midi_getinfo(dev, &mi); 1349 oflags = flags; 1350 if ((mi.props & MIDI_PROP_CAN_INPUT) == 0) 1351 flags &= ~FREAD; 1352 if ((flags & (FREAD|FWRITE)) == 0) { 1353 VOP_CLOSE(vp, oflags, kauth_cred_get()); 1354 vrele(vp); 1355 return NULL; 1356 } 1357 1358 sc = device_lookup_private(&midi_cd, unit); 1359 md = kmem_zalloc(sizeof(*md), KM_SLEEP); 1360 md->msc = sc; 1361 md->unit = unit; 1362 md->name = mi.name; 1363 md->subtype = 0; 1364 md->nr_voices = 128; /* XXX */ 1365 md->instr_bank_size = 128; /* XXX */ 1366 md->vp = vp; 1367 if (mi.props & MIDI_PROP_CAN_INPUT) 1368 md->capabilities |= SYNTH_CAP_INPUT; 1369 sc->seq_md = md; 1370 return (md); 1371 } 1372 1373 static void 1374 midiseq_close(struct midi_dev *md) 1375 { 1376 int major; 1377 dev_t dev; 1378 1379 major = devsw_name2chr("midi", NULL, 0); 1380 dev = makedev(major, md->unit); 1381 1382 DPRINTFN(2, ("midiseq_close: %d\n", md->unit)); 1383 (void)vn_close(md->vp, 0, kauth_cred_get()); 1384 kmem_free(md, sizeof(*md)); 1385 } 1386 1387 static void 1388 midiseq_reset(struct midi_dev *md) 1389 { 1390 /* XXX send GM reset? */ 1391 DPRINTFN(3, ("midiseq_reset: %d\n", md->unit)); 1392 } 1393 1394 static int 1395 midiseq_out(struct midi_dev *md, u_char *bf, u_int cc, int chk) 1396 { 1397 DPRINTFN(5, ("midiseq_out: m=%p, unit=%d, bf[0]=0x%02x, cc=%d\n", 1398 md->msc, md->unit, bf[0], cc)); 1399 1400 /* midi(4) does running status compression where appropriate. */ 1401 return midi_writebytes(md->unit, bf, cc); 1402 } 1403 1404 /* 1405 * If the writing process hands us a hidden note-off in a note-on event, 1406 * we will simply write it that way; no need to special case it here, 1407 * as midi(4) will always canonicalize or compress as appropriate anyway. 1408 */ 1409 static int 1410 midiseq_noteon(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1411 { 1412 return midiseq_out(md, (uint8_t[]){ 1413 MIDI_NOTEON | chan, key, ev->c_NOTEON.velocity & 0x7f}, 3, 1); 1414 } 1415 1416 static int 1417 midiseq_noteoff(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1418 { 1419 return midiseq_out(md, (uint8_t[]){ 1420 MIDI_NOTEOFF | chan, key, ev->c_NOTEOFF.velocity & 0x7f}, 3, 1); 1421 } 1422 1423 static int 1424 midiseq_keypressure(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1425 { 1426 return midiseq_out(md, (uint8_t[]){ 1427 MIDI_KEY_PRESSURE | chan, key, 1428 ev->c_KEY_PRESSURE.pressure & 0x7f}, 3, 1); 1429 } 1430 1431 static int 1432 midiseq_pgmchange(struct midi_dev *md, int chan, seq_event_t *ev) 1433 { 1434 if (ev->c_PGM_CHANGE.program > 127) 1435 return EINVAL; 1436 return midiseq_out(md, (uint8_t[]){ 1437 MIDI_PGM_CHANGE | chan, ev->c_PGM_CHANGE.program}, 2, 1); 1438 } 1439 1440 static int 1441 midiseq_chnpressure(struct midi_dev *md, int chan, seq_event_t *ev) 1442 { 1443 if (ev->c_CHN_PRESSURE.pressure > 127) 1444 return EINVAL; 1445 return midiseq_out(md, (uint8_t[]){ 1446 MIDI_CHN_PRESSURE | chan, ev->c_CHN_PRESSURE.pressure}, 2, 1); 1447 } 1448 1449 static int 1450 midiseq_ctlchange(struct midi_dev *md, int chan, seq_event_t *ev) 1451 { 1452 if (ev->c_CTL_CHANGE.controller > 127) 1453 return EINVAL; 1454 return midiseq_out( md, (uint8_t[]){ 1455 MIDI_CTL_CHANGE | chan, ev->c_CTL_CHANGE.controller, 1456 ev->c_CTL_CHANGE.value & 0x7f /* XXX this is SO wrong */ 1457 }, 3, 1); 1458 } 1459 1460 static int 1461 midiseq_pitchbend(struct midi_dev *md, int chan, seq_event_t *ev) 1462 { 1463 return midiseq_out(md, (uint8_t[]){ 1464 MIDI_PITCH_BEND | chan, 1465 ev->c_PITCH_BEND.value & 0x7f, 1466 (ev->c_PITCH_BEND.value >> 7) & 0x7f}, 3, 1); 1467 } 1468 1469 static int 1470 midiseq_loadpatch(struct midi_dev *md, 1471 struct sysex_info *sysex, struct uio *uio) 1472 { 1473 struct sequencer_softc *sc; 1474 u_char c, bf[128]; 1475 int i, cc, error; 1476 1477 if (sysex->key != SEQ_SYSEX_PATCH) { 1478 DPRINTFN(-1,("midiseq_loadpatch: bad patch key 0x%04x\n", 1479 sysex->key)); 1480 return (EINVAL); 1481 } 1482 if (uio->uio_resid < sysex->len) 1483 /* adjust length, should be an error */ 1484 sysex->len = uio->uio_resid; 1485 1486 DPRINTFN(2, ("midiseq_loadpatch: len=%d\n", sysex->len)); 1487 if (sysex->len == 0) 1488 return EINVAL; 1489 error = uiomove(&c, 1, uio); 1490 if (error) 1491 return error; 1492 if (c != MIDI_SYSEX_START) /* must start like this */ 1493 return EINVAL; 1494 sc = md->seq; 1495 mutex_enter(&sc->lock); 1496 error = midiseq_out(md, &c, 1, 0); 1497 mutex_exit(&sc->lock); 1498 if (error) 1499 return error; 1500 --sysex->len; 1501 while (sysex->len > 0) { 1502 cc = sysex->len; 1503 if (cc > sizeof bf) 1504 cc = sizeof bf; 1505 error = uiomove(bf, cc, uio); 1506 if (error) 1507 break; 1508 for(i = 0; i < cc && !MIDI_IS_STATUS(bf[i]); i++) 1509 ; 1510 /* 1511 * XXX midi(4)'s buffer might not accommodate this, and the 1512 * function will not block us (though in this case we have 1513 * a process and could in principle block). 1514 */ 1515 mutex_enter(&sc->lock); 1516 error = midiseq_out(md, bf, i, 0); 1517 mutex_exit(&sc->lock); 1518 if (error) 1519 break; 1520 sysex->len -= i; 1521 if (i != cc) 1522 break; 1523 } 1524 /* 1525 * Any leftover data in uio is rubbish; 1526 * the SYSEX should be one write ending in SYSEX_END. 1527 */ 1528 uio->uio_resid = 0; 1529 c = MIDI_SYSEX_END; 1530 mutex_enter(&sc->lock); 1531 error = midiseq_out(md, &c, 1, 0); 1532 mutex_exit(&sc->lock); 1533 return error; 1534 } 1535 1536 #include "midi.h" 1537 #if NMIDI == 0 1538 static dev_type_open(midiopen); 1539 static dev_type_close(midiclose); 1540 1541 const struct cdevsw midi_cdevsw = { 1542 midiopen, midiclose, noread, nowrite, noioctl, 1543 nostop, notty, nopoll, nommap, nokqfilter, D_OTHER | D_MPSAFE 1544 }; 1545 1546 /* 1547 * If someone has a sequencer, but no midi devices there will 1548 * be unresolved references, so we provide little stubs. 1549 */ 1550 1551 int 1552 midi_unit_count(void) 1553 { 1554 return (0); 1555 } 1556 1557 static int 1558 midiopen(dev_t dev, int flags, int ifmt, struct lwp *l) 1559 { 1560 return (ENXIO); 1561 } 1562 1563 struct cfdriver midi_cd; 1564 1565 void 1566 midi_getinfo(dev_t dev, struct midi_info *mi) 1567 { 1568 mi->name = "Dummy MIDI device"; 1569 mi->props = 0; 1570 } 1571 1572 static int 1573 midiclose(dev_t dev, int flags, int ifmt, struct lwp *l) 1574 { 1575 return (ENXIO); 1576 } 1577 1578 int 1579 midi_writebytes(int unit, u_char *bf, int cc) 1580 { 1581 return (ENXIO); 1582 } 1583 #endif /* NMIDI == 0 */ 1584