1 /* $NetBSD: sequencer.c,v 1.70 2017/10/29 17:57:21 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@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 1.70 2017/10/29 17:57:21 riastradh Exp $"); 59 60 #ifdef _KERNEL_OPT 61 #include "sequencer.h" 62 #include "midi.h" 63 #endif 64 65 #include <sys/param.h> 66 #include <sys/ioctl.h> 67 #include <sys/fcntl.h> 68 #include <sys/vnode.h> 69 #include <sys/select.h> 70 #include <sys/poll.h> 71 #include <sys/kmem.h> 72 #include <sys/proc.h> 73 #include <sys/systm.h> 74 #include <sys/syslog.h> 75 #include <sys/kernel.h> 76 #include <sys/signalvar.h> 77 #include <sys/conf.h> 78 #include <sys/audioio.h> 79 #include <sys/midiio.h> 80 #include <sys/device.h> 81 #include <sys/intr.h> 82 #include <sys/atomic.h> 83 #include <sys/pcq.h> 84 #include <sys/vnode.h> 85 #include <sys/kauth.h> 86 #include <sys/module.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) if (sequencerdebug) printf x 126 #define DPRINTFN(n,x) if (sequencerdebug >= (n)) printf x 127 int sequencerdebug = 0; 128 #else 129 #define DPRINTF(x) 130 #define DPRINTFN(n,x) 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 *, struct uio *); 153 static int seq_input_event(struct sequencer_softc *, seq_event_t *); 154 static int seq_drain(struct sequencer_softc *); 155 static void seq_startoutput(struct sequencer_softc *); 156 static void seq_timeout(void *); 157 static int seq_to_new(seq_event_t *, struct uio *); 158 static void seq_softintr(void *); 159 160 static int midiseq_out(struct midi_dev *, u_char *, u_int, int); 161 static struct midi_dev *midiseq_open(int, int); 162 static void midiseq_close(struct midi_dev *); 163 static void midiseq_reset(struct midi_dev *); 164 static int midiseq_noteon(struct midi_dev *, int, int, seq_event_t *); 165 static int midiseq_noteoff(struct midi_dev *, int, int, seq_event_t *); 166 static int midiseq_keypressure(struct midi_dev *, int, int, seq_event_t *); 167 static int midiseq_pgmchange(struct midi_dev *, int, seq_event_t *); 168 static int midiseq_chnpressure(struct midi_dev *, int, seq_event_t *); 169 static int midiseq_ctlchange(struct midi_dev *, int, seq_event_t *); 170 static int midiseq_pitchbend(struct midi_dev *, int, seq_event_t *); 171 static int midiseq_loadpatch(struct midi_dev *, struct sysex_info *, struct uio *); 172 void midiseq_in(struct midi_dev *, u_char *, int); 173 174 static dev_type_open(sequenceropen); 175 static dev_type_close(sequencerclose); 176 static dev_type_read(sequencerread); 177 static dev_type_write(sequencerwrite); 178 static dev_type_ioctl(sequencerioctl); 179 static dev_type_poll(sequencerpoll); 180 static dev_type_kqfilter(sequencerkqfilter); 181 182 const struct cdevsw sequencer_cdevsw = { 183 .d_open = sequenceropen, 184 .d_close = sequencerclose, 185 .d_read = sequencerread, 186 .d_write = sequencerwrite, 187 .d_ioctl = sequencerioctl, 188 .d_stop = nostop, 189 .d_tty = notty, 190 .d_poll = sequencerpoll, 191 .d_mmap = nommap, 192 .d_kqfilter = sequencerkqfilter, 193 .d_discard = nodiscard, 194 .d_flag = D_OTHER | D_MPSAFE 195 }; 196 static LIST_HEAD(, sequencer_softc) sequencers = LIST_HEAD_INITIALIZER(sequencers); 197 static kmutex_t sequencer_lock; 198 199 static void 200 sequencerdestroy(struct sequencer_softc *sc) 201 { 202 callout_halt(&sc->sc_callout, &sc->lock); 203 callout_destroy(&sc->sc_callout); 204 softint_disestablish(sc->sih); 205 cv_destroy(&sc->rchan); 206 cv_destroy(&sc->wchan); 207 cv_destroy(&sc->lchan); 208 if (sc->pcq) 209 pcq_destroy(sc->pcq); 210 kmem_free(sc, sizeof(*sc)); 211 } 212 213 static struct sequencer_softc * 214 sequencercreate(int unit) 215 { 216 struct sequencer_softc *sc = kmem_zalloc(sizeof(*sc), KM_SLEEP); 217 sc->sc_unit = unit; 218 callout_init(&sc->sc_callout, CALLOUT_MPSAFE); 219 sc->sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 220 seq_softintr, sc); 221 mutex_init(&sc->lock, MUTEX_DEFAULT, IPL_NONE); 222 cv_init(&sc->rchan, "midiseqr"); 223 cv_init(&sc->wchan, "midiseqw"); 224 cv_init(&sc->lchan, "midiseql"); 225 sc->pcq = pcq_create(SEQ_MAXQ, KM_SLEEP); 226 if (sc->pcq == NULL) { 227 sequencerdestroy(sc); 228 return NULL; 229 } 230 return sc; 231 } 232 233 234 static struct sequencer_softc * 235 sequencerget(int unit) 236 { 237 struct sequencer_softc *sc; 238 if (unit < 0) { 239 #ifdef DIAGNOSTIC 240 panic("%s: unit %d!", __func__, unit); 241 #endif 242 return NULL; 243 } 244 mutex_enter(&sequencer_lock); 245 LIST_FOREACH(sc, &sequencers, sc_link) { 246 if (sc->sc_unit == unit) { 247 mutex_exit(&sequencer_lock); 248 return sc; 249 } 250 } 251 mutex_exit(&sequencer_lock); 252 if ((sc = sequencercreate(unit)) == NULL) 253 return NULL; 254 mutex_enter(&sequencer_lock); 255 LIST_INSERT_HEAD(&sequencers, sc, sc_link); 256 mutex_exit(&sequencer_lock); 257 return sc; 258 } 259 260 #ifdef notyet 261 static void 262 sequencerput(struct sequencer_softc *sc) 263 { 264 mutex_enter(&sequencer_lock); 265 LIST_REMOVE(sc, sc_link); 266 mutex_exit(&sequencer_lock); 267 sequencerdestroy(sc); 268 } 269 #endif 270 271 void 272 sequencerattach(int n) 273 { 274 mutex_init(&sequencer_lock, MUTEX_DEFAULT, IPL_NONE); 275 } 276 277 /* 278 * Release reference to device acquired with sequencer_enter(). 279 */ 280 static void 281 sequencer_exit(struct sequencer_softc *sc) 282 { 283 284 sc->dvlock--; 285 cv_broadcast(&sc->lchan); 286 mutex_exit(&sc->lock); 287 } 288 289 /* 290 * Look up sequencer device and acquire locks for device access. 291 */ 292 static int 293 sequencer_enter(dev_t dev, struct sequencer_softc **scp) 294 { 295 struct sequencer_softc *sc; 296 297 /* First, find the device and take sc_lock. */ 298 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 299 return ENXIO; 300 mutex_enter(&sc->lock); 301 while (sc->dvlock) { 302 cv_wait(&sc->lchan, &sc->lock); 303 } 304 sc->dvlock++; 305 if (sc->dying) { 306 sequencer_exit(sc); 307 return EIO; 308 } 309 *scp = sc; 310 return 0; 311 } 312 313 static int 314 sequenceropen(dev_t dev, int flags, int ifmt, struct lwp *l) 315 { 316 struct sequencer_softc *sc; 317 struct midi_dev *md; 318 struct midi_softc *msc; 319 int error, unit, mdno; 320 321 DPRINTF(("sequenceropen\n")); 322 323 if ((error = sequencer_enter(dev, &sc)) != 0) 324 return error; 325 if (sc->isopen != 0) { 326 sequencer_exit(sc); 327 return EBUSY; 328 } 329 330 if (SEQ_IS_OLD(SEQUENCERUNIT(dev))) 331 sc->mode = SEQ_OLD; 332 else 333 sc->mode = SEQ_NEW; 334 sc->isopen++; 335 sc->flags = flags & (FREAD|FWRITE); 336 sc->pbus = 0; 337 sc->async = 0; 338 sc->input_stamp = ~0; 339 340 sc->nmidi = 0; 341 sc->ndevs = midi_unit_count(); 342 sc->timer.timebase_divperbeat = 100; 343 sc->timer.tempo_beatpermin = 60; 344 RECALC_USPERDIV(&sc->timer); 345 sc->timer.divs_lastevent = sc->timer.divs_lastchange = 0; 346 microtime(&sc->timer.reftime); 347 348 SEQ_QINIT(&sc->inq); 349 SEQ_QINIT(&sc->outq); 350 sc->lowat = SEQ_MAXQ / 2; 351 352 if (sc->ndevs > 0) { 353 mutex_exit(&sc->lock); 354 sc->devs = kmem_alloc(sc->ndevs * sizeof(struct midi_dev *), 355 KM_SLEEP); 356 for (unit = 0; unit < sc->ndevs; unit++) { 357 md = midiseq_open(unit, flags); 358 if (md) { 359 sc->devs[sc->nmidi++] = md; 360 md->seq = sc; 361 md->doingsysex = 0; 362 DPRINTF(("%s: midi unit %d opened as seq %p\n", 363 __func__, unit, md)); 364 } else { 365 DPRINTF(("%s: midi unit %d not opened as seq\n", 366 __func__, unit)); 367 } 368 } 369 mutex_enter(&sc->lock); 370 } else { 371 sc->devs = NULL; 372 } 373 374 /* Only now redirect input from MIDI devices. */ 375 for (mdno = 0; mdno < sc->nmidi; mdno++) { 376 msc = device_lookup_private(&midi_cd, sc->devs[mdno]->unit); 377 if (msc) { 378 mutex_enter(msc->lock); 379 msc->seqopen = 1; 380 mutex_exit(msc->lock); 381 } 382 } 383 384 seq_reset(sc); 385 sequencer_exit(sc); 386 387 DPRINTF(("%s: mode=%d, nmidi=%d\n", __func__, sc->mode, sc->nmidi)); 388 return 0; 389 } 390 391 static int 392 seq_drain(struct sequencer_softc *sc) 393 { 394 int error; 395 396 KASSERT(mutex_owned(&sc->lock)); 397 398 DPRINTFN(3, ("seq_drain: %p, len=%d\n", sc, SEQ_QLEN(&sc->outq))); 399 seq_startoutput(sc); 400 error = 0; 401 while (!SEQ_QEMPTY(&sc->outq) && !error) 402 error = cv_timedwait_sig(&sc->wchan, &sc->lock, 60*hz); 403 return (error); 404 } 405 406 static void 407 seq_timeout(void *addr) 408 { 409 struct sequencer_softc *sc = addr; 410 proc_t *p; 411 pid_t pid; 412 413 DPRINTFN(4, ("seq_timeout: %p\n", sc)); 414 415 mutex_enter(&sc->lock); 416 if (sc->timeout == 0) { 417 mutex_spin_exit(&sc->lock); 418 return; 419 } 420 sc->timeout = 0; 421 seq_startoutput(sc); 422 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 423 mutex_exit(&sc->lock); 424 return; 425 } 426 cv_broadcast(&sc->wchan); 427 selnotify(&sc->wsel, 0, NOTE_SUBMIT); 428 if ((pid = sc->async) != 0) { 429 mutex_enter(proc_lock); 430 if ((p = proc_find(pid)) != NULL) 431 psignal(p, SIGIO); 432 mutex_exit(proc_lock); 433 } 434 mutex_exit(&sc->lock); 435 } 436 437 static void 438 seq_startoutput(struct sequencer_softc *sc) 439 { 440 struct sequencer_queue *q = &sc->outq; 441 seq_event_t cmd; 442 443 KASSERT(mutex_owned(&sc->lock)); 444 445 if (sc->timeout) 446 return; 447 DPRINTFN(4, ("seq_startoutput: %p, len=%d\n", sc, SEQ_QLEN(q))); 448 while (!SEQ_QEMPTY(q) && !sc->timeout) { 449 SEQ_QGET(q, cmd); 450 seq_do_command(sc, &cmd); 451 } 452 } 453 454 static int 455 sequencerclose(dev_t dev, int flags, int ifmt, struct lwp *l) 456 { 457 struct sequencer_softc *sc; 458 struct midi_softc *msc; 459 int unit, error; 460 461 DPRINTF(("%s: %"PRIx64"\n", __func__, dev)); 462 463 if ((error = sequencer_enter(dev, &sc)) != 0) 464 return error; 465 seq_drain(sc); 466 if (sc->timeout) { 467 callout_halt(&sc->sc_callout, &sc->lock); 468 sc->timeout = 0; 469 } 470 /* Bin input from MIDI devices. */ 471 for (unit = 0; unit < sc->nmidi; unit++) { 472 msc = device_lookup_private(&midi_cd, unit); 473 if (msc) { 474 mutex_enter(msc->lock); 475 msc->seqopen = 0; 476 mutex_exit(msc->lock); 477 } 478 } 479 mutex_exit(&sc->lock); 480 481 for (unit = 0; unit < sc->nmidi; unit++) 482 if (sc->devs[unit] != NULL) 483 midiseq_close(sc->devs[unit]); 484 if (sc->devs != NULL) { 485 KASSERT(sc->ndevs > 0); 486 kmem_free(sc->devs, sc->ndevs * sizeof(struct midi_dev *)); 487 sc->devs = NULL; 488 } 489 490 mutex_enter(&sc->lock); 491 sc->isopen = 0; 492 sequencer_exit(sc); 493 494 DPRINTF(("%s: %"PRIx64" done\n", __func__, dev)); 495 496 return (0); 497 } 498 499 static int 500 seq_input_event(struct sequencer_softc *sc, seq_event_t *cmd) 501 { 502 struct sequencer_queue *q; 503 504 KASSERT(mutex_owned(&sc->lock)); 505 506 DPRINTFN(2, ("seq_input_event: %02x %02x %02x %02x %02x " 507 "%02x %02x %02x\n", cmd->tag, 508 cmd->unknown.byte[0], cmd->unknown.byte[1], 509 cmd->unknown.byte[2], cmd->unknown.byte[3], 510 cmd->unknown.byte[4], cmd->unknown.byte[5], 511 cmd->unknown.byte[6])); 512 q = &sc->inq; 513 if (SEQ_QFULL(q)) 514 return (ENOMEM); 515 SEQ_QPUT(q, *cmd); 516 cv_broadcast(&sc->rchan); 517 selnotify(&sc->rsel, 0, NOTE_SUBMIT); 518 if (sc->async != 0) { 519 proc_t *p; 520 521 mutex_enter(proc_lock); 522 if ((p = proc_find(sc->async)) != NULL) 523 psignal(p, SIGIO); 524 mutex_exit(proc_lock); 525 } 526 return 0; 527 } 528 529 static void 530 seq_softintr(void *addr) 531 { 532 struct sequencer_softc *sc; 533 struct timeval now; 534 seq_event_t ev; 535 int status, chan, unit; 536 sequencer_pcqitem_t qi; 537 u_long t; 538 539 sc = addr; 540 541 mutex_enter(&sc->lock); 542 543 qi.qi_ptr = pcq_get(sc->pcq); 544 if (qi.qi_ptr == NULL) { 545 mutex_exit(&sc->lock); 546 return; 547 } 548 KASSERT((qi.qi_msg[3] & 0x80) != 0); 549 unit = qi.qi_msg[3] & ~0x80; 550 status = MIDI_GET_STATUS(qi.qi_msg[0]); 551 chan = MIDI_GET_CHAN(qi.qi_msg[0]); 552 switch (status) { 553 case MIDI_NOTEON: /* midi(4) always canonicalizes hidden note-off */ 554 ev = SEQ_MK_CHN(NOTEON, .device=unit, .channel=chan, 555 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 556 break; 557 case MIDI_NOTEOFF: 558 ev = SEQ_MK_CHN(NOTEOFF, .device=unit, .channel=chan, 559 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 560 break; 561 case MIDI_KEY_PRESSURE: 562 ev = SEQ_MK_CHN(KEY_PRESSURE, .device=unit, .channel=chan, 563 .key=qi.qi_msg[1], .pressure=qi.qi_msg[2]); 564 break; 565 case MIDI_CTL_CHANGE: /* XXX not correct for MSB */ 566 ev = SEQ_MK_CHN(CTL_CHANGE, .device=unit, .channel=chan, 567 .controller=qi.qi_msg[1], .value=qi.qi_msg[2]); 568 break; 569 case MIDI_PGM_CHANGE: 570 ev = SEQ_MK_CHN(PGM_CHANGE, .device=unit, .channel=chan, 571 .program=qi.qi_msg[1]); 572 break; 573 case MIDI_CHN_PRESSURE: 574 ev = SEQ_MK_CHN(CHN_PRESSURE, .device=unit, .channel=chan, 575 .pressure=qi.qi_msg[1]); 576 break; 577 case MIDI_PITCH_BEND: 578 ev = SEQ_MK_CHN(PITCH_BEND, .device=unit, .channel=chan, 579 .value=(qi.qi_msg[1] & 0x7f) | ((qi.qi_msg[2] & 0x7f) << 7)); 580 break; 581 default: /* this is now the point where MIDI_ACKs disappear */ 582 mutex_exit(&sc->lock); 583 return; 584 } 585 microtime(&now); 586 if (!sc->timer.running) 587 now = sc->timer.stoptime; 588 SUBTIMEVAL(&now, &sc->timer.reftime); 589 t = now.tv_sec * 1000000 + now.tv_usec; 590 t /= sc->timer.usperdiv; 591 t += sc->timer.divs_lastchange; 592 if (t != sc->input_stamp) { 593 seq_input_event(sc, &SEQ_MK_TIMING(WAIT_ABS, .divisions=t)); 594 sc->input_stamp = t; /* XXX what happens if timer is reset? */ 595 } 596 seq_input_event(sc, &ev); 597 mutex_exit(&sc->lock); 598 } 599 600 static int 601 sequencerread(dev_t dev, struct uio *uio, int ioflag) 602 { 603 struct sequencer_softc *sc; 604 struct sequencer_queue *q; 605 seq_event_t ev; 606 int error; 607 608 DPRINTFN(2, ("sequencerread: %"PRIx64", count=%d, ioflag=%x\n", 609 dev, (int)uio->uio_resid, ioflag)); 610 611 if ((error = sequencer_enter(dev, &sc)) != 0) 612 return error; 613 q = &sc->inq; 614 615 if (sc->mode == SEQ_OLD) { 616 sequencer_exit(sc); 617 DPRINTFN(-1,("sequencerread: old read\n")); 618 return EINVAL; /* XXX unimplemented */ 619 } 620 while (SEQ_QEMPTY(q)) { 621 if (ioflag & IO_NDELAY) { 622 error = EWOULDBLOCK; 623 break; 624 } 625 /* Drop lock to allow concurrent read/write. */ 626 KASSERT(sc->dvlock != 0); 627 sc->dvlock--; 628 error = cv_wait_sig(&sc->rchan, &sc->lock); 629 while (sc->dvlock != 0) { 630 cv_wait(&sc->lchan, &sc->lock); 631 } 632 sc->dvlock++; 633 if (error) { 634 break; 635 } 636 } 637 while (uio->uio_resid >= sizeof(ev) && !error && !SEQ_QEMPTY(q)) { 638 SEQ_QGET(q, ev); 639 mutex_exit(&sc->lock); 640 error = uiomove(&ev, sizeof(ev), uio); 641 mutex_enter(&sc->lock); 642 } 643 sequencer_exit(sc); 644 return error; 645 } 646 647 static int 648 sequencerwrite(dev_t dev, struct uio *uio, int ioflag) 649 { 650 struct sequencer_softc *sc; 651 struct sequencer_queue *q; 652 int error; 653 seq_event_t cmdbuf; 654 int size; 655 656 DPRINTFN(2, ("sequencerwrite: %"PRIx64", count=%d\n", dev, 657 (int)uio->uio_resid)); 658 659 if ((error = sequencer_enter(dev, &sc)) != 0) 660 return error; 661 q = &sc->outq; 662 663 size = sc->mode == SEQ_NEW ? sizeof cmdbuf : SEQOLD_CMDSIZE; 664 while (uio->uio_resid >= size && error == 0) { 665 mutex_exit(&sc->lock); 666 error = uiomove(&cmdbuf, size, uio); 667 if (error == 0) { 668 if (sc->mode == SEQ_OLD && seq_to_new(&cmdbuf, uio)) { 669 mutex_enter(&sc->lock); 670 continue; 671 } 672 if (cmdbuf.tag == SEQ_FULLSIZE) { 673 /* We do it like OSS does, asynchronously */ 674 error = seq_do_fullsize(sc, &cmdbuf, uio); 675 if (error == 0) { 676 mutex_enter(&sc->lock); 677 continue; 678 } 679 } 680 } 681 mutex_enter(&sc->lock); 682 if (error != 0) { 683 break; 684 } 685 while (SEQ_QFULL(q)) { 686 seq_startoutput(sc); 687 if (SEQ_QFULL(q)) { 688 if (ioflag & IO_NDELAY) { 689 error = EWOULDBLOCK; 690 break; 691 } 692 error = cv_wait_sig(&sc->wchan, &sc->lock); 693 if (error) { 694 break; 695 } 696 } 697 } 698 if (error == 0) { 699 SEQ_QPUT(q, cmdbuf); 700 } 701 } 702 if (error == 0) { 703 seq_startoutput(sc); 704 } else { 705 DPRINTFN(2, ("sequencerwrite: error=%d\n", error)); 706 } 707 sequencer_exit(sc); 708 return error; 709 } 710 711 static int 712 sequencerioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 713 { 714 struct sequencer_softc *sc; 715 struct synth_info *si; 716 struct midi_dev *md; 717 int devno, error, t; 718 struct timeval now; 719 u_long tx; 720 721 DPRINTFN(2, ("sequencerioctl: %"PRIx64" cmd=0x%08lx\n", dev, cmd)); 722 723 if ((error = sequencer_enter(dev, &sc)) != 0) 724 return error; 725 switch (cmd) { 726 case FIONBIO: 727 /* All handled in the upper FS layer. */ 728 break; 729 730 case FIOASYNC: 731 if (*(int *)addr) { 732 if (sc->async != 0) 733 return EBUSY; 734 sc->async = curproc->p_pid; 735 DPRINTF(("%s: FIOASYNC %d\n", __func__, 736 sc->async)); 737 } else { 738 sc->async = 0; 739 } 740 break; 741 742 case SEQUENCER_RESET: 743 seq_reset(sc); 744 break; 745 746 case SEQUENCER_PANIC: 747 seq_reset(sc); 748 /* Do more? OSS doesn't */ 749 break; 750 751 case SEQUENCER_SYNC: 752 if (sc->flags != FREAD) 753 seq_drain(sc); 754 break; 755 756 case SEQUENCER_INFO: 757 si = (struct synth_info*)addr; 758 devno = si->device; 759 if (devno < 0 || devno >= sc->nmidi) { 760 error = EINVAL; 761 break; 762 } 763 md = sc->devs[devno]; 764 strncpy(si->name, md->name, sizeof si->name); 765 si->synth_type = SYNTH_TYPE_MIDI; 766 si->synth_subtype = md->subtype; 767 si->nr_voices = md->nr_voices; 768 si->instr_bank_size = md->instr_bank_size; 769 si->capabilities = md->capabilities; 770 break; 771 772 case SEQUENCER_NRSYNTHS: 773 *(int *)addr = sc->nmidi; 774 break; 775 776 case SEQUENCER_NRMIDIS: 777 *(int *)addr = sc->nmidi; 778 break; 779 780 case SEQUENCER_OUTOFBAND: 781 DPRINTFN(3, ("sequencer_ioctl: OOB=%02x %02x %02x %02x %02x %02x %02x %02x\n", 782 *(u_char *)addr, *((u_char *)addr+1), 783 *((u_char *)addr+2), *((u_char *)addr+3), 784 *((u_char *)addr+4), *((u_char *)addr+5), 785 *((u_char *)addr+6), *((u_char *)addr+7))); 786 if ((sc->flags & FWRITE) == 0) { 787 error = EBADF; 788 } else { 789 error = seq_do_command(sc, (seq_event_t *)addr); 790 } 791 break; 792 793 case SEQUENCER_TMR_TIMEBASE: 794 t = *(int *)addr; 795 if (t < 1) 796 t = 1; 797 if (t > 10000) 798 t = 10000; 799 *(int *)addr = t; 800 sc->timer.timebase_divperbeat = t; 801 sc->timer.divs_lastchange = sc->timer.divs_lastevent; 802 microtime(&sc->timer.reftime); 803 RECALC_USPERDIV(&sc->timer); 804 break; 805 806 case SEQUENCER_TMR_START: 807 error = seq_do_timing(sc, &SEQ_MK_TIMING(START)); 808 break; 809 810 case SEQUENCER_TMR_STOP: 811 error = seq_do_timing(sc, &SEQ_MK_TIMING(STOP)); 812 break; 813 814 case SEQUENCER_TMR_CONTINUE: 815 error = seq_do_timing(sc, &SEQ_MK_TIMING(CONTINUE)); 816 break; 817 818 case SEQUENCER_TMR_TEMPO: 819 error = seq_do_timing(sc, 820 &SEQ_MK_TIMING(TEMPO, .bpm=*(int *)addr)); 821 RECALC_USPERDIV(&sc->timer); 822 if (error == 0) 823 *(int *)addr = sc->timer.tempo_beatpermin; 824 break; 825 826 case SEQUENCER_TMR_SOURCE: 827 *(int *)addr = SEQUENCER_TMR_INTERNAL; 828 break; 829 830 case SEQUENCER_TMR_METRONOME: 831 /* noop */ 832 break; 833 834 case SEQUENCER_THRESHOLD: 835 t = SEQ_MAXQ - *(int *)addr / sizeof (seq_event_rec); 836 if (t < 1) 837 t = 1; 838 if (t > SEQ_MAXQ) 839 t = SEQ_MAXQ; 840 sc->lowat = t; 841 break; 842 843 case SEQUENCER_CTRLRATE: 844 *(int *)addr = (sc->timer.tempo_beatpermin 845 *sc->timer.timebase_divperbeat + 30) / 60; 846 break; 847 848 case SEQUENCER_GETTIME: 849 microtime(&now); 850 SUBTIMEVAL(&now, &sc->timer.reftime); 851 tx = now.tv_sec * 1000000 + now.tv_usec; 852 tx /= sc->timer.usperdiv; 853 tx += sc->timer.divs_lastchange; 854 *(int *)addr = tx; 855 break; 856 857 default: 858 DPRINTFN(-1,("sequencer_ioctl: unimpl %08lx\n", cmd)); 859 error = EINVAL; 860 break; 861 } 862 sequencer_exit(sc); 863 864 return error; 865 } 866 867 static int 868 sequencerpoll(dev_t dev, int events, struct lwp *l) 869 { 870 struct sequencer_softc *sc; 871 int revents = 0; 872 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 873 return ENXIO; 874 875 DPRINTF(("%s: %p events=0x%x\n", __func__, sc, events)); 876 877 mutex_enter(&sc->lock); 878 if (events & (POLLIN | POLLRDNORM)) 879 if ((sc->flags&FREAD) && !SEQ_QEMPTY(&sc->inq)) 880 revents |= events & (POLLIN | POLLRDNORM); 881 882 if (events & (POLLOUT | POLLWRNORM)) 883 if ((sc->flags&FWRITE) && SEQ_QLEN(&sc->outq) < sc->lowat) 884 revents |= events & (POLLOUT | POLLWRNORM); 885 886 if (revents == 0) { 887 if ((sc->flags&FREAD) && (events & (POLLIN | POLLRDNORM))) 888 selrecord(l, &sc->rsel); 889 890 if ((sc->flags&FWRITE) && (events & (POLLOUT | POLLWRNORM))) 891 selrecord(l, &sc->wsel); 892 } 893 mutex_exit(&sc->lock); 894 895 return revents; 896 } 897 898 static void 899 filt_sequencerrdetach(struct knote *kn) 900 { 901 struct sequencer_softc *sc = kn->kn_hook; 902 903 mutex_enter(&sc->lock); 904 SLIST_REMOVE(&sc->rsel.sel_klist, kn, knote, kn_selnext); 905 mutex_exit(&sc->lock); 906 } 907 908 static int 909 filt_sequencerread(struct knote *kn, long hint) 910 { 911 struct sequencer_softc *sc = kn->kn_hook; 912 int rv; 913 914 if (hint != NOTE_SUBMIT) { 915 mutex_enter(&sc->lock); 916 } 917 if (SEQ_QEMPTY(&sc->inq)) { 918 rv = 0; 919 } else { 920 kn->kn_data = sizeof(seq_event_rec); 921 rv = 1; 922 } 923 if (hint != NOTE_SUBMIT) { 924 mutex_exit(&sc->lock); 925 } 926 return rv; 927 } 928 929 static const struct filterops sequencerread_filtops = { 930 .f_isfd = 1, 931 .f_attach = NULL, 932 .f_detach = filt_sequencerrdetach, 933 .f_event = filt_sequencerread, 934 }; 935 936 static void 937 filt_sequencerwdetach(struct knote *kn) 938 { 939 struct sequencer_softc *sc = kn->kn_hook; 940 941 mutex_enter(&sc->lock); 942 SLIST_REMOVE(&sc->wsel.sel_klist, kn, knote, kn_selnext); 943 mutex_exit(&sc->lock); 944 } 945 946 static int 947 filt_sequencerwrite(struct knote *kn, long hint) 948 { 949 struct sequencer_softc *sc = kn->kn_hook; 950 int rv; 951 952 if (hint != NOTE_SUBMIT) { 953 mutex_enter(&sc->lock); 954 } 955 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 956 rv = 0; 957 } else { 958 kn->kn_data = sizeof(seq_event_rec); 959 rv = 1; 960 } 961 if (hint != NOTE_SUBMIT) { 962 mutex_exit(&sc->lock); 963 } 964 return rv; 965 } 966 967 static const struct filterops sequencerwrite_filtops = { 968 .f_isfd = 1, 969 .f_attach = NULL, 970 .f_detach = filt_sequencerwdetach, 971 .f_event = filt_sequencerwrite, 972 }; 973 974 static int 975 sequencerkqfilter(dev_t dev, struct knote *kn) 976 { 977 struct sequencer_softc *sc; 978 struct klist *klist; 979 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 980 return ENXIO; 981 982 switch (kn->kn_filter) { 983 case EVFILT_READ: 984 klist = &sc->rsel.sel_klist; 985 kn->kn_fop = &sequencerread_filtops; 986 break; 987 988 case EVFILT_WRITE: 989 klist = &sc->wsel.sel_klist; 990 kn->kn_fop = &sequencerwrite_filtops; 991 break; 992 993 default: 994 return (EINVAL); 995 } 996 997 kn->kn_hook = sc; 998 999 mutex_enter(&sc->lock); 1000 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 1001 mutex_exit(&sc->lock); 1002 1003 return (0); 1004 } 1005 1006 static void 1007 seq_reset(struct sequencer_softc *sc) 1008 { 1009 int i, chn; 1010 struct midi_dev *md; 1011 1012 KASSERT(mutex_owned(&sc->lock)); 1013 1014 if (!(sc->flags & FWRITE)) 1015 return; 1016 for (i = 0; i < sc->nmidi; i++) { 1017 md = sc->devs[i]; 1018 midiseq_reset(md); 1019 for (chn = 0; chn < MAXCHAN; chn++) { 1020 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 1021 .controller=MIDI_CTRL_NOTES_OFF)); 1022 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 1023 .controller=MIDI_CTRL_RESET)); 1024 midiseq_pitchbend(md, chn, &SEQ_MK_CHN(PITCH_BEND, 1025 .value=MIDI_BEND_NEUTRAL)); 1026 } 1027 } 1028 } 1029 1030 static int 1031 seq_do_command(struct sequencer_softc *sc, seq_event_t *b) 1032 { 1033 int dev; 1034 1035 KASSERT(mutex_owned(&sc->lock)); 1036 1037 DPRINTFN(4, ("seq_do_command: %p cmd=0x%02x\n", sc, b->timing.op)); 1038 1039 switch(b->tag) { 1040 case SEQ_LOCAL: 1041 return seq_do_local(sc, b); 1042 case SEQ_TIMING: 1043 return seq_do_timing(sc, b); 1044 case SEQ_CHN_VOICE: 1045 return seq_do_chnvoice(sc, b); 1046 case SEQ_CHN_COMMON: 1047 return seq_do_chncommon(sc, b); 1048 case SEQ_SYSEX: 1049 return seq_do_sysex(sc, b); 1050 /* COMPAT */ 1051 case SEQOLD_MIDIPUTC: 1052 dev = b->putc.device; 1053 if (dev < 0 || dev >= sc->nmidi) 1054 return (ENXIO); 1055 return midiseq_out(sc->devs[dev], &b->putc.byte, 1, 0); 1056 default: 1057 DPRINTFN(-1,("seq_do_command: unimpl command %02x\n", b->tag)); 1058 return (EINVAL); 1059 } 1060 } 1061 1062 static int 1063 seq_do_chnvoice(struct sequencer_softc *sc, seq_event_t *b) 1064 { 1065 int dev; 1066 int error; 1067 struct midi_dev *md; 1068 1069 KASSERT(mutex_owned(&sc->lock)); 1070 1071 dev = b->voice.device; 1072 if (dev < 0 || dev >= sc->nmidi || 1073 b->voice.channel > 15 || 1074 b->voice.key >= SEQ_NOTE_MAX) 1075 return ENXIO; 1076 md = sc->devs[dev]; 1077 switch(b->voice.op) { 1078 case MIDI_NOTEON: /* no need to special-case hidden noteoff here */ 1079 error = midiseq_noteon(md, b->voice.channel, b->voice.key, b); 1080 break; 1081 case MIDI_NOTEOFF: 1082 error = midiseq_noteoff(md, b->voice.channel, b->voice.key, b); 1083 break; 1084 case MIDI_KEY_PRESSURE: 1085 error = midiseq_keypressure(md, 1086 b->voice.channel, b->voice.key, b); 1087 break; 1088 default: 1089 DPRINTFN(-1,("seq_do_chnvoice: unimpl command %02x\n", 1090 b->voice.op)); 1091 error = EINVAL; 1092 break; 1093 } 1094 return error; 1095 } 1096 1097 static int 1098 seq_do_chncommon(struct sequencer_softc *sc, seq_event_t *b) 1099 { 1100 int dev; 1101 int error; 1102 struct midi_dev *md; 1103 1104 KASSERT(mutex_owned(&sc->lock)); 1105 1106 dev = b->common.device; 1107 if (dev < 0 || dev >= sc->nmidi || 1108 b->common.channel > 15) 1109 return ENXIO; 1110 md = sc->devs[dev]; 1111 DPRINTFN(2,("seq_do_chncommon: %02x\n", b->common.op)); 1112 1113 error = 0; 1114 switch(b->common.op) { 1115 case MIDI_PGM_CHANGE: 1116 error = midiseq_pgmchange(md, b->common.channel, b); 1117 break; 1118 case MIDI_CTL_CHANGE: 1119 error = midiseq_ctlchange(md, b->common.channel, b); 1120 break; 1121 case MIDI_PITCH_BEND: 1122 error = midiseq_pitchbend(md, b->common.channel, b); 1123 break; 1124 case MIDI_CHN_PRESSURE: 1125 error = midiseq_chnpressure(md, b->common.channel, b); 1126 break; 1127 default: 1128 DPRINTFN(-1,("seq_do_chncommon: unimpl command %02x\n", 1129 b->common.op)); 1130 error = EINVAL; 1131 break; 1132 } 1133 return error; 1134 } 1135 1136 static int 1137 seq_do_local(struct sequencer_softc *sc, seq_event_t *b) 1138 { 1139 1140 KASSERT(mutex_owned(&sc->lock)); 1141 1142 return (EINVAL); 1143 } 1144 1145 static int 1146 seq_do_sysex(struct sequencer_softc *sc, seq_event_t *b) 1147 { 1148 int dev, i; 1149 struct midi_dev *md; 1150 uint8_t *bf = b->sysex.buffer; 1151 1152 KASSERT(mutex_owned(&sc->lock)); 1153 1154 dev = b->sysex.device; 1155 if (dev < 0 || dev >= sc->nmidi) 1156 return (ENXIO); 1157 DPRINTF(("%s: dev=%d\n", __func__, dev)); 1158 md = sc->devs[dev]; 1159 1160 if (!md->doingsysex) { 1161 midiseq_out(md, (uint8_t[]){MIDI_SYSEX_START}, 1, 0); 1162 md->doingsysex = 1; 1163 } 1164 1165 for (i = 0; i < 6 && bf[i] != 0xff; i++) 1166 ; 1167 midiseq_out(md, bf, i, 0); 1168 if (i < 6 || (i > 0 && bf[i-1] == MIDI_SYSEX_END)) 1169 md->doingsysex = 0; 1170 return 0; 1171 } 1172 1173 static void 1174 seq_timer_waitabs(struct sequencer_softc *sc, uint32_t divs) 1175 { 1176 struct timeval when; 1177 long long usec; 1178 struct syn_timer *t; 1179 int ticks; 1180 1181 KASSERT(mutex_owned(&sc->lock)); 1182 1183 t = &sc->timer; 1184 t->divs_lastevent = divs; 1185 divs -= t->divs_lastchange; 1186 usec = (long long)divs * (long long)t->usperdiv; /* convert to usec */ 1187 when.tv_sec = usec / 1000000; 1188 when.tv_usec = usec % 1000000; 1189 DPRINTFN(4, ("seq_timer_waitabs: adjdivs=%d, sleep when=%"PRId64".%06"PRId64, 1190 divs, when.tv_sec, (uint64_t)when.tv_usec)); 1191 ADDTIMEVAL(&when, &t->reftime); /* abstime for end */ 1192 ticks = tvhzto(&when); 1193 DPRINTFN(4, (" when+start=%"PRId64".%06"PRId64", tick=%d\n", 1194 when.tv_sec, (uint64_t)when.tv_usec, ticks)); 1195 if (ticks > 0) { 1196 #ifdef DIAGNOSTIC 1197 if (ticks > 20 * hz) { 1198 /* Waiting more than 20s */ 1199 printf("seq_timer_waitabs: funny ticks=%d, " 1200 "usec=%lld\n", ticks, usec); 1201 } 1202 #endif 1203 sc->timeout = 1; 1204 callout_reset(&sc->sc_callout, ticks, 1205 seq_timeout, sc); 1206 } 1207 #ifdef SEQUENCER_DEBUG 1208 else if (tick < 0) 1209 DPRINTF(("%s: ticks = %d\n", __func__, ticks)); 1210 #endif 1211 } 1212 1213 static int 1214 seq_do_timing(struct sequencer_softc *sc, seq_event_t *b) 1215 { 1216 struct syn_timer *t = &sc->timer; 1217 struct timeval when; 1218 int error; 1219 1220 KASSERT(mutex_owned(&sc->lock)); 1221 1222 error = 0; 1223 switch(b->timing.op) { 1224 case TMR_WAIT_REL: 1225 seq_timer_waitabs(sc, 1226 b->t_WAIT_REL.divisions + t->divs_lastevent); 1227 break; 1228 case TMR_WAIT_ABS: 1229 seq_timer_waitabs(sc, b->t_WAIT_ABS.divisions); 1230 break; 1231 case TMR_START: 1232 microtime(&t->reftime); 1233 t->divs_lastevent = t->divs_lastchange = 0; 1234 t->running = 1; 1235 break; 1236 case TMR_STOP: 1237 microtime(&t->stoptime); 1238 t->running = 0; 1239 break; 1240 case TMR_CONTINUE: 1241 if (t->running) 1242 break; 1243 microtime(&when); 1244 SUBTIMEVAL(&when, &t->stoptime); 1245 ADDTIMEVAL(&t->reftime, &when); 1246 t->running = 1; 1247 break; 1248 case TMR_TEMPO: 1249 /* bpm is unambiguously MIDI clocks per minute / 24 */ 1250 /* (24 MIDI clocks are usually but not always a quarter note) */ 1251 if (b->t_TEMPO.bpm < 8) /* where are these limits specified? */ 1252 t->tempo_beatpermin = 8; 1253 else if (b->t_TEMPO.bpm > 360) /* ? */ 1254 t->tempo_beatpermin = 360; 1255 else 1256 t->tempo_beatpermin = b->t_TEMPO.bpm; 1257 t->divs_lastchange = t->divs_lastevent; 1258 microtime(&t->reftime); 1259 RECALC_USPERDIV(t); 1260 break; 1261 case TMR_ECHO: 1262 error = seq_input_event(sc, b); 1263 break; 1264 case TMR_RESET: 1265 t->divs_lastevent = t->divs_lastchange = 0; 1266 microtime(&t->reftime); 1267 break; 1268 case TMR_SPP: 1269 case TMR_TIMESIG: 1270 DPRINTF(("%s: unimplemented %02x\n", __func__, b->timing.op)); 1271 error = EINVAL; /* not quite accurate... */ 1272 break; 1273 default: 1274 DPRINTF(("%s: unknown %02x\n", __func__, b->timing.op)); 1275 error = EINVAL; 1276 break; 1277 } 1278 return (error); 1279 } 1280 1281 static int 1282 seq_do_fullsize(struct sequencer_softc *sc, seq_event_t *b, struct uio *uio) 1283 { 1284 struct sysex_info sysex; 1285 u_int dev; 1286 1287 #ifdef DIAGNOSTIC 1288 if (sizeof(seq_event_rec) != SEQ_SYSEX_HDRSIZE) { 1289 printf("seq_do_fullsize: sysex size ??\n"); 1290 return EINVAL; 1291 } 1292 #endif 1293 memcpy(&sysex, b, sizeof sysex); 1294 dev = sysex.device_no; 1295 if (/* dev < 0 || */ dev >= sc->nmidi) 1296 return (ENXIO); 1297 DPRINTFN(2, ("seq_do_fullsize: fmt=%04x, dev=%d, len=%d\n", 1298 sysex.key, dev, sysex.len)); 1299 return (midiseq_loadpatch(sc->devs[dev], &sysex, uio)); 1300 } 1301 1302 /* 1303 * Convert an old sequencer event to a new one. 1304 * NOTE: on entry, *ev may contain valid data only in the first 4 bytes. 1305 * That may be true even on exit (!) in the case of SEQOLD_MIDIPUTC; the 1306 * caller will only look at the first bytes in that case anyway. Ugly? Sure. 1307 */ 1308 static int 1309 seq_to_new(seq_event_t *ev, struct uio *uio) 1310 { 1311 int cmd, chan, note, parm; 1312 uint32_t tmp_delay; 1313 int error; 1314 uint8_t *bfp; 1315 1316 cmd = ev->tag; 1317 bfp = ev->unknown.byte; 1318 chan = *bfp++; 1319 note = *bfp++; 1320 parm = *bfp++; 1321 DPRINTFN(3, ("seq_to_new: 0x%02x %d %d %d\n", cmd, chan, note, parm)); 1322 1323 if (cmd >= 0x80) { 1324 /* Fill the event record */ 1325 if (uio->uio_resid >= sizeof *ev - SEQOLD_CMDSIZE) { 1326 error = uiomove(bfp, sizeof *ev - SEQOLD_CMDSIZE, uio); 1327 if (error) 1328 return error; 1329 } else 1330 return EINVAL; 1331 } 1332 1333 switch(cmd) { 1334 case SEQOLD_NOTEOFF: 1335 /* 1336 * What's with the SEQ_NOTE_XXX? In OSS this seems to have 1337 * been undocumented magic for messing with the overall volume 1338 * of a 'voice', equated precariously with 'channel' and 1339 * pretty much unimplementable except by directly frobbing a 1340 * synth chip. For us, who treat everything as interfaced over 1341 * MIDI, this will just be unceremoniously discarded as 1342 * invalid in midiseq_noteoff, making the whole event an 1343 * elaborate no-op, and that doesn't seem to be any different 1344 * from what happens on linux with a MIDI-interfaced device, 1345 * by the way. The moral is ... use the new /dev/music API, ok? 1346 */ 1347 *ev = SEQ_MK_CHN(NOTEOFF, .device=0, .channel=chan, 1348 .key=SEQ_NOTE_XXX, .velocity=parm); 1349 break; 1350 case SEQOLD_NOTEON: 1351 *ev = SEQ_MK_CHN(NOTEON, 1352 .device=0, .channel=chan, .key=note, .velocity=parm); 1353 break; 1354 case SEQOLD_WAIT: 1355 /* 1356 * This event cannot even /exist/ on non-littleendian machines, 1357 * and so help me, that's exactly the way OSS defined it. 1358 * Also, the OSS programmer's guide states (p. 74, v1.11) 1359 * that seqold time units are system clock ticks, unlike 1360 * the new 'divisions' which are determined by timebase. In 1361 * that case we would need to do scaling here - but no such 1362 * behavior is visible in linux either--which also treats this 1363 * value, surprisingly, as an absolute, not relative, time. 1364 * My guess is that this event has gone unused so long that 1365 * nobody could agree we got it wrong no matter what we do. 1366 */ 1367 tmp_delay = *(uint32_t *)ev >> 8; 1368 *ev = SEQ_MK_TIMING(WAIT_ABS, .divisions=tmp_delay); 1369 break; 1370 case SEQOLD_SYNCTIMER: 1371 /* 1372 * The TMR_RESET event is not defined in any OSS materials 1373 * I can find; it may have been invented here just to provide 1374 * an accurate _to_new translation of this event. 1375 */ 1376 *ev = SEQ_MK_TIMING(RESET); 1377 break; 1378 case SEQOLD_PGMCHANGE: 1379 *ev = SEQ_MK_CHN(PGM_CHANGE, 1380 .device=0, .channel=chan, .program=note); 1381 break; 1382 case SEQOLD_MIDIPUTC: 1383 break; /* interpret in normal mode */ 1384 case SEQOLD_ECHO: 1385 case SEQOLD_PRIVATE: 1386 case SEQOLD_EXTENDED: 1387 default: 1388 DPRINTF(("%s: not impl 0x%02x\n", __func__, cmd)); 1389 return EINVAL; 1390 /* In case new-style events show up */ 1391 case SEQ_TIMING: 1392 case SEQ_CHN_VOICE: 1393 case SEQ_CHN_COMMON: 1394 case SEQ_FULLSIZE: 1395 break; 1396 } 1397 return 0; 1398 } 1399 1400 /**********************************************/ 1401 1402 void 1403 midiseq_in(struct midi_dev *md, u_char *msg, int len) 1404 { 1405 struct sequencer_softc *sc; 1406 sequencer_pcqitem_t qi; 1407 1408 DPRINTFN(2, ("midiseq_in: %p %02x %02x %02x\n", 1409 md, msg[0], msg[1], msg[2])); 1410 1411 sc = md->seq; 1412 1413 qi.qi_msg[0] = msg[0]; 1414 qi.qi_msg[1] = msg[1]; 1415 qi.qi_msg[2] = msg[2]; 1416 qi.qi_msg[3] = md->unit | 0x80; /* ensure non-zero value of qi_ptr */ 1417 pcq_put(sc->pcq, qi.qi_ptr); 1418 softint_schedule(sc->sih); 1419 } 1420 1421 static struct midi_dev * 1422 midiseq_open(int unit, int flags) 1423 { 1424 int error; 1425 struct midi_dev *md; 1426 struct midi_softc *sc; 1427 struct midi_info mi; 1428 int major; 1429 dev_t dev; 1430 vnode_t *vp; 1431 int oflags; 1432 1433 major = devsw_name2chr("midi", NULL, 0); 1434 dev = makedev(major, unit); 1435 1436 DPRINTFN(2, ("midiseq_open: %d %d\n", unit, flags)); 1437 1438 error = cdevvp(dev, &vp); 1439 if (error) 1440 return NULL; 1441 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1442 error = VOP_OPEN(vp, flags, kauth_cred_get()); 1443 VOP_UNLOCK(vp); 1444 if (error) { 1445 vrele(vp); 1446 return NULL; 1447 } 1448 1449 /* Only after we have acquired reference via VOP_OPEN(). */ 1450 midi_getinfo(dev, &mi); 1451 oflags = flags; 1452 if ((mi.props & MIDI_PROP_CAN_INPUT) == 0) 1453 flags &= ~FREAD; 1454 if ((flags & (FREAD|FWRITE)) == 0) { 1455 VOP_CLOSE(vp, oflags, kauth_cred_get()); 1456 vrele(vp); 1457 return NULL; 1458 } 1459 1460 sc = device_lookup_private(&midi_cd, unit); 1461 md = kmem_zalloc(sizeof(*md), KM_SLEEP); 1462 md->unit = unit; 1463 md->name = mi.name; 1464 md->subtype = 0; 1465 md->nr_voices = 128; /* XXX */ 1466 md->instr_bank_size = 128; /* XXX */ 1467 md->vp = vp; 1468 if (mi.props & MIDI_PROP_CAN_INPUT) 1469 md->capabilities |= SYNTH_CAP_INPUT; 1470 sc->seq_md = md; 1471 return (md); 1472 } 1473 1474 static void 1475 midiseq_close(struct midi_dev *md) 1476 { 1477 DPRINTFN(2, ("midiseq_close: %d\n", md->unit)); 1478 (void)vn_close(md->vp, 0, kauth_cred_get()); 1479 kmem_free(md, sizeof(*md)); 1480 } 1481 1482 static void 1483 midiseq_reset(struct midi_dev *md) 1484 { 1485 /* XXX send GM reset? */ 1486 DPRINTFN(3, ("midiseq_reset: %d\n", md->unit)); 1487 } 1488 1489 static int 1490 midiseq_out(struct midi_dev *md, u_char *bf, u_int cc, int chk) 1491 { 1492 DPRINTFN(5, ("midiseq_out: md=%p, unit=%d, bf[0]=0x%02x, cc=%d\n", 1493 md, md->unit, bf[0], cc)); 1494 1495 /* midi(4) does running status compression where appropriate. */ 1496 return midi_writebytes(md->unit, bf, cc); 1497 } 1498 1499 /* 1500 * If the writing process hands us a hidden note-off in a note-on event, 1501 * we will simply write it that way; no need to special case it here, 1502 * as midi(4) will always canonicalize or compress as appropriate anyway. 1503 */ 1504 static int 1505 midiseq_noteon(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1506 { 1507 return midiseq_out(md, (uint8_t[]){ 1508 MIDI_NOTEON | chan, key, ev->c_NOTEON.velocity & 0x7f}, 3, 1); 1509 } 1510 1511 static int 1512 midiseq_noteoff(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1513 { 1514 return midiseq_out(md, (uint8_t[]){ 1515 MIDI_NOTEOFF | chan, key, ev->c_NOTEOFF.velocity & 0x7f}, 3, 1); 1516 } 1517 1518 static int 1519 midiseq_keypressure(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1520 { 1521 return midiseq_out(md, (uint8_t[]){ 1522 MIDI_KEY_PRESSURE | chan, key, 1523 ev->c_KEY_PRESSURE.pressure & 0x7f}, 3, 1); 1524 } 1525 1526 static int 1527 midiseq_pgmchange(struct midi_dev *md, int chan, seq_event_t *ev) 1528 { 1529 if (ev->c_PGM_CHANGE.program > 127) 1530 return EINVAL; 1531 return midiseq_out(md, (uint8_t[]){ 1532 MIDI_PGM_CHANGE | chan, ev->c_PGM_CHANGE.program}, 2, 1); 1533 } 1534 1535 static int 1536 midiseq_chnpressure(struct midi_dev *md, int chan, seq_event_t *ev) 1537 { 1538 if (ev->c_CHN_PRESSURE.pressure > 127) 1539 return EINVAL; 1540 return midiseq_out(md, (uint8_t[]){ 1541 MIDI_CHN_PRESSURE | chan, ev->c_CHN_PRESSURE.pressure}, 2, 1); 1542 } 1543 1544 static int 1545 midiseq_ctlchange(struct midi_dev *md, int chan, seq_event_t *ev) 1546 { 1547 if (ev->c_CTL_CHANGE.controller > 127) 1548 return EINVAL; 1549 return midiseq_out( md, (uint8_t[]){ 1550 MIDI_CTL_CHANGE | chan, ev->c_CTL_CHANGE.controller, 1551 ev->c_CTL_CHANGE.value & 0x7f /* XXX this is SO wrong */ 1552 }, 3, 1); 1553 } 1554 1555 static int 1556 midiseq_pitchbend(struct midi_dev *md, int chan, seq_event_t *ev) 1557 { 1558 return midiseq_out(md, (uint8_t[]){ 1559 MIDI_PITCH_BEND | chan, 1560 ev->c_PITCH_BEND.value & 0x7f, 1561 (ev->c_PITCH_BEND.value >> 7) & 0x7f}, 3, 1); 1562 } 1563 1564 static int 1565 midiseq_loadpatch(struct midi_dev *md, 1566 struct sysex_info *sysex, struct uio *uio) 1567 { 1568 struct sequencer_softc *sc; 1569 u_char c, bf[128]; 1570 int i, cc, error; 1571 1572 if (sysex->key != SEQ_SYSEX_PATCH) { 1573 DPRINTFN(-1,("midiseq_loadpatch: bad patch key 0x%04x\n", 1574 sysex->key)); 1575 return (EINVAL); 1576 } 1577 if (uio->uio_resid < sysex->len) 1578 /* adjust length, should be an error */ 1579 sysex->len = uio->uio_resid; 1580 1581 DPRINTFN(2, ("midiseq_loadpatch: len=%d\n", sysex->len)); 1582 if (sysex->len == 0) 1583 return EINVAL; 1584 error = uiomove(&c, 1, uio); 1585 if (error) 1586 return error; 1587 if (c != MIDI_SYSEX_START) /* must start like this */ 1588 return EINVAL; 1589 sc = md->seq; 1590 mutex_enter(&sc->lock); 1591 error = midiseq_out(md, &c, 1, 0); 1592 mutex_exit(&sc->lock); 1593 if (error) 1594 return error; 1595 --sysex->len; 1596 while (sysex->len > 0) { 1597 cc = sysex->len; 1598 if (cc > sizeof bf) 1599 cc = sizeof bf; 1600 error = uiomove(bf, cc, uio); 1601 if (error) 1602 break; 1603 for(i = 0; i < cc && !MIDI_IS_STATUS(bf[i]); i++) 1604 ; 1605 /* 1606 * XXX midi(4)'s buffer might not accommodate this, and the 1607 * function will not block us (though in this case we have 1608 * a process and could in principle block). 1609 */ 1610 mutex_enter(&sc->lock); 1611 error = midiseq_out(md, bf, i, 0); 1612 mutex_exit(&sc->lock); 1613 if (error) 1614 break; 1615 sysex->len -= i; 1616 if (i != cc) 1617 break; 1618 } 1619 /* 1620 * Any leftover data in uio is rubbish; 1621 * the SYSEX should be one write ending in SYSEX_END. 1622 */ 1623 uio->uio_resid = 0; 1624 c = MIDI_SYSEX_END; 1625 mutex_enter(&sc->lock); 1626 error = midiseq_out(md, &c, 1, 0); 1627 mutex_exit(&sc->lock); 1628 return error; 1629 } 1630 1631 #if NMIDI == 0 1632 static dev_type_open(midiopen); 1633 static dev_type_close(midiclose); 1634 1635 const struct cdevsw midi_cdevsw = { 1636 .d_open = midiopen, 1637 .d_close = midiclose, 1638 .d_read = noread, 1639 .d_write = nowrite, 1640 .d_ioctl = noioctl, 1641 .d_stop = nostop, 1642 .d_tty = notty, 1643 .d_poll = nopoll, 1644 .d_mmap = nommap, 1645 .d_kqfilter = nokqfilter, 1646 .d_discard = nodiscard, 1647 .d_flag = D_OTHER | D_MPSAFE 1648 }; 1649 1650 /* 1651 * If someone has a sequencer, but no midi devices there will 1652 * be unresolved references, so we provide little stubs. 1653 */ 1654 1655 int 1656 midi_unit_count(void) 1657 { 1658 return (0); 1659 } 1660 1661 static int 1662 midiopen(dev_t dev, int flags, int ifmt, struct lwp *l) 1663 { 1664 return (ENXIO); 1665 } 1666 1667 struct cfdriver midi_cd; 1668 1669 void 1670 midi_getinfo(dev_t dev, struct midi_info *mi) 1671 { 1672 mi->name = "Dummy MIDI device"; 1673 mi->props = 0; 1674 } 1675 1676 static int 1677 midiclose(dev_t dev, int flags, int ifmt, struct lwp *l) 1678 { 1679 return (ENXIO); 1680 } 1681 1682 int 1683 midi_writebytes(int unit, u_char *bf, int cc) 1684 { 1685 return (ENXIO); 1686 } 1687 #endif /* NMIDI == 0 */ 1688 1689 #ifdef _MODULE 1690 #include "ioconf.c" 1691 1692 devmajor_t sequencer_bmajor = -1, sequencer_cmajor = -1; 1693 #endif 1694 1695 MODULE(MODULE_CLASS_DRIVER, sequencer, "midi"); 1696 1697 static int 1698 sequencer_modcmd(modcmd_t cmd, void *arg) 1699 { 1700 int error = 0; 1701 1702 #ifdef _MODULE 1703 switch (cmd) { 1704 case MODULE_CMD_INIT: 1705 error = devsw_attach(sequencer_cd.cd_name, 1706 NULL, &sequencer_bmajor, 1707 &sequencer_cdevsw, &sequencer_cmajor); 1708 if (error) 1709 break; 1710 1711 error = config_init_component(cfdriver_ioconf_sequencer, 1712 cfattach_ioconf_sequencer, cfdata_ioconf_sequencer); 1713 if (error) { 1714 devsw_detach(NULL, &sequencer_cdevsw); 1715 } 1716 break; 1717 case MODULE_CMD_FINI: 1718 devsw_detach(NULL, &sequencer_cdevsw); 1719 error = config_fini_component(cfdriver_ioconf_sequencer, 1720 cfattach_ioconf_sequencer, cfdata_ioconf_sequencer); 1721 if (error) 1722 devsw_attach(sequencer_cd.cd_name, 1723 NULL, &sequencer_bmajor, 1724 &sequencer_cdevsw, &sequencer_cmajor); 1725 break; 1726 default: 1727 error = ENOTTY; 1728 break; 1729 } 1730 #endif 1731 1732 return error; 1733 } 1734