1 /* $NetBSD: sequencer.c,v 1.58 2014/03/16 05:20:26 dholland 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 1.58 2014/03/16 05:20:26 dholland Exp $"); 59 60 #include "sequencer.h" 61 62 #include <sys/param.h> 63 #include <sys/ioctl.h> 64 #include <sys/fcntl.h> 65 #include <sys/vnode.h> 66 #include <sys/select.h> 67 #include <sys/poll.h> 68 #include <sys/kmem.h> 69 #include <sys/proc.h> 70 #include <sys/systm.h> 71 #include <sys/syslog.h> 72 #include <sys/kernel.h> 73 #include <sys/signalvar.h> 74 #include <sys/conf.h> 75 #include <sys/audioio.h> 76 #include <sys/midiio.h> 77 #include <sys/device.h> 78 #include <sys/intr.h> 79 #include <sys/atomic.h> 80 #include <sys/pcq.h> 81 #include <sys/vnode.h> 82 #include <sys/kauth.h> 83 84 #include <dev/midi_if.h> 85 #include <dev/midivar.h> 86 #include <dev/sequencervar.h> 87 88 #define ADDTIMEVAL(a, b) ( \ 89 (a)->tv_sec += (b)->tv_sec, \ 90 (a)->tv_usec += (b)->tv_usec, \ 91 (a)->tv_usec > 1000000 ? ((a)->tv_sec++, (a)->tv_usec -= 1000000) : 0\ 92 ) 93 94 #define SUBTIMEVAL(a, b) ( \ 95 (a)->tv_sec -= (b)->tv_sec, \ 96 (a)->tv_usec -= (b)->tv_usec, \ 97 (a)->tv_usec < 0 ? ((a)->tv_sec--, (a)->tv_usec += 1000000) : 0\ 98 ) 99 100 #ifdef AUDIO_DEBUG 101 #define DPRINTF(x) if (sequencerdebug) printf x 102 #define DPRINTFN(n,x) if (sequencerdebug >= (n)) printf x 103 int sequencerdebug = 0; 104 #else 105 #define DPRINTF(x) 106 #define DPRINTFN(n,x) 107 #endif 108 109 #define SEQ_NOTE_MAX 128 110 #define SEQ_NOTE_XXX 255 111 112 #define RECALC_USPERDIV(t) \ 113 ((t)->usperdiv = 60*1000000L/((t)->tempo_beatpermin*(t)->timebase_divperbeat)) 114 115 typedef union sequencer_pcqitem { 116 void *qi_ptr; 117 char qi_msg[4]; 118 } sequencer_pcqitem_t; 119 120 void sequencerattach(int); 121 static void seq_reset(struct sequencer_softc *); 122 static int seq_do_command(struct sequencer_softc *, seq_event_t *); 123 static int seq_do_chnvoice(struct sequencer_softc *, seq_event_t *); 124 static int seq_do_chncommon(struct sequencer_softc *, seq_event_t *); 125 static void seq_timer_waitabs(struct sequencer_softc *, uint32_t); 126 static int seq_do_timing(struct sequencer_softc *, seq_event_t *); 127 static int seq_do_local(struct sequencer_softc *, seq_event_t *); 128 static int seq_do_sysex(struct sequencer_softc *, seq_event_t *); 129 static int seq_do_fullsize(struct sequencer_softc *, seq_event_t *, struct uio *); 130 static int seq_input_event(struct sequencer_softc *, seq_event_t *); 131 static int seq_drain(struct sequencer_softc *); 132 static void seq_startoutput(struct sequencer_softc *); 133 static void seq_timeout(void *); 134 static int seq_to_new(seq_event_t *, struct uio *); 135 static void seq_softintr(void *); 136 137 static int midiseq_out(struct midi_dev *, u_char *, u_int, int); 138 static struct midi_dev *midiseq_open(int, int); 139 static void midiseq_close(struct midi_dev *); 140 static void midiseq_reset(struct midi_dev *); 141 static int midiseq_noteon(struct midi_dev *, int, int, seq_event_t *); 142 static int midiseq_noteoff(struct midi_dev *, int, int, seq_event_t *); 143 static int midiseq_keypressure(struct midi_dev *, int, int, seq_event_t *); 144 static int midiseq_pgmchange(struct midi_dev *, int, seq_event_t *); 145 static int midiseq_chnpressure(struct midi_dev *, int, seq_event_t *); 146 static int midiseq_ctlchange(struct midi_dev *, int, seq_event_t *); 147 static int midiseq_pitchbend(struct midi_dev *, int, seq_event_t *); 148 static int midiseq_loadpatch(struct midi_dev *, struct sysex_info *, struct uio *); 149 void midiseq_in(struct midi_dev *, u_char *, int); 150 151 static dev_type_open(sequenceropen); 152 static dev_type_close(sequencerclose); 153 static dev_type_read(sequencerread); 154 static dev_type_write(sequencerwrite); 155 static dev_type_ioctl(sequencerioctl); 156 static dev_type_poll(sequencerpoll); 157 static dev_type_kqfilter(sequencerkqfilter); 158 159 const struct cdevsw sequencer_cdevsw = { 160 .d_open = sequenceropen, 161 .d_close = sequencerclose, 162 .d_read = sequencerread, 163 .d_write = sequencerwrite, 164 .d_ioctl = sequencerioctl, 165 .d_stop = nostop, 166 .d_tty = notty, 167 .d_poll = sequencerpoll, 168 .d_mmap = nommap, 169 .d_kqfilter = sequencerkqfilter, 170 .d_flag = D_OTHER | D_MPSAFE 171 }; 172 static LIST_HEAD(, sequencer_softc) sequencers = LIST_HEAD_INITIALIZER(sequencers); 173 static kmutex_t sequencer_lock; 174 175 static void 176 sequencerdestroy(struct sequencer_softc *sc) { 177 callout_destroy(&sc->sc_callout); 178 softint_disestablish(sc->sih); 179 cv_destroy(&sc->rchan); 180 cv_destroy(&sc->wchan); 181 cv_destroy(&sc->lchan); 182 if (sc->pcq) 183 pcq_destroy(sc->pcq); 184 kmem_free(sc, sizeof(*sc)); 185 } 186 187 static struct sequencer_softc * 188 sequencercreate(int unit) { 189 struct sequencer_softc *sc = kmem_zalloc(sizeof(*sc), KM_SLEEP); 190 if (sc == NULL) { 191 #ifdef DIAGNOSTIC 192 printf("%s: out of memory\n", __func__); 193 #endif 194 return NULL; 195 } 196 sc->sc_unit = unit; 197 callout_init(&sc->sc_callout, CALLOUT_MPSAFE); 198 sc->sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 199 seq_softintr, sc); 200 mutex_init(&sc->lock, MUTEX_DEFAULT, IPL_NONE); 201 cv_init(&sc->rchan, "midiseqr"); 202 cv_init(&sc->wchan, "midiseqw"); 203 cv_init(&sc->lchan, "midiseql"); 204 sc->pcq = pcq_create(SEQ_MAXQ, KM_SLEEP); 205 if (sc->pcq == NULL) { 206 sequencerdestroy(sc); 207 return NULL; 208 } 209 return sc; 210 } 211 212 213 static struct sequencer_softc * 214 sequencerget(int unit) { 215 struct sequencer_softc *sc; 216 if (unit < 0) { 217 #ifdef DIAGNOSTIC 218 panic("%s: unit %d!", __func__, unit); 219 #endif 220 return NULL; 221 } 222 mutex_enter(&sequencer_lock); 223 LIST_FOREACH(sc, &sequencers, sc_link) { 224 if (sc->sc_unit == unit) { 225 mutex_exit(&sequencer_lock); 226 return sc; 227 } 228 } 229 mutex_exit(&sequencer_lock); 230 if ((sc = sequencercreate(unit)) == NULL) 231 return NULL; 232 mutex_enter(&sequencer_lock); 233 LIST_INSERT_HEAD(&sequencers, sc, sc_link); 234 mutex_exit(&sequencer_lock); 235 return sc; 236 } 237 238 #ifdef notyet 239 static void 240 sequencerput(struct sequencer_softc *sc) { 241 mutex_enter(&sequencer_lock); 242 LIST_REMOVE(sc, sc_link); 243 mutex_exit(&sequencer_lock); 244 sequencerdestroy(sc); 245 } 246 #endif 247 248 void 249 sequencerattach(int n) 250 { 251 mutex_init(&sequencer_lock, MUTEX_DEFAULT, IPL_NONE); 252 } 253 254 /* 255 * Release reference to device acquired with sequencer_enter(). 256 */ 257 static void 258 sequencer_exit(struct sequencer_softc *sc) 259 { 260 261 sc->dvlock--; 262 cv_broadcast(&sc->lchan); 263 mutex_exit(&sc->lock); 264 } 265 266 /* 267 * Look up sequencer device and acquire locks for device access. 268 */ 269 static int 270 sequencer_enter(dev_t dev, struct sequencer_softc **scp) 271 { 272 struct sequencer_softc *sc; 273 274 /* First, find the device and take sc_lock. */ 275 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 276 return ENXIO; 277 mutex_enter(&sc->lock); 278 while (sc->dvlock) { 279 cv_wait(&sc->lchan, &sc->lock); 280 } 281 sc->dvlock++; 282 if (sc->dying) { 283 sequencer_exit(sc); 284 return EIO; 285 } 286 *scp = sc; 287 return 0; 288 } 289 290 static int 291 sequenceropen(dev_t dev, int flags, int ifmt, struct lwp *l) 292 { 293 struct sequencer_softc *sc; 294 struct midi_dev *md; 295 struct midi_softc *msc; 296 int error, unit; 297 298 DPRINTF(("sequenceropen\n")); 299 300 if ((error = sequencer_enter(dev, &sc)) != 0) 301 return error; 302 if (sc->isopen != 0) { 303 sequencer_exit(sc); 304 return EBUSY; 305 } 306 307 if (SEQ_IS_OLD(SEQUENCERUNIT(dev))) 308 sc->mode = SEQ_OLD; 309 else 310 sc->mode = SEQ_NEW; 311 sc->isopen++; 312 sc->flags = flags & (FREAD|FWRITE); 313 sc->pbus = 0; 314 sc->async = 0; 315 sc->input_stamp = ~0; 316 317 sc->nmidi = 0; 318 sc->ndevs = midi_unit_count(); 319 sc->timer.timebase_divperbeat = 100; 320 sc->timer.tempo_beatpermin = 60; 321 RECALC_USPERDIV(&sc->timer); 322 sc->timer.divs_lastevent = sc->timer.divs_lastchange = 0; 323 microtime(&sc->timer.reftime); 324 325 SEQ_QINIT(&sc->inq); 326 SEQ_QINIT(&sc->outq); 327 sc->lowat = SEQ_MAXQ / 2; 328 329 if (sc->ndevs > 0) { 330 mutex_exit(&sc->lock); 331 sc->devs = kmem_alloc(sc->ndevs * sizeof(struct midi_dev *), 332 KM_SLEEP); 333 for (unit = 0; unit < sc->ndevs; unit++) { 334 md = midiseq_open(unit, flags); 335 if (md) { 336 sc->devs[sc->nmidi++] = md; 337 md->seq = sc; 338 md->doingsysex = 0; 339 } 340 } 341 mutex_enter(&sc->lock); 342 } else { 343 sc->devs = NULL; 344 } 345 346 /* Only now redirect input from MIDI devices. */ 347 for (unit = 0; unit < sc->nmidi; unit++) { 348 msc = sc->devs[unit]->msc; 349 mutex_enter(msc->lock); 350 msc->seqopen = 1; 351 mutex_exit(msc->lock); 352 } 353 354 seq_reset(sc); 355 sequencer_exit(sc); 356 357 DPRINTF(("%s: mode=%d, nmidi=%d\n", __func__, sc->mode, sc->nmidi)); 358 return 0; 359 } 360 361 static int 362 seq_drain(struct sequencer_softc *sc) 363 { 364 int error; 365 366 KASSERT(mutex_owned(&sc->lock)); 367 368 DPRINTFN(3, ("seq_drain: %p, len=%d\n", sc, SEQ_QLEN(&sc->outq))); 369 seq_startoutput(sc); 370 error = 0; 371 while (!SEQ_QEMPTY(&sc->outq) && !error) 372 error = cv_timedwait_sig(&sc->wchan, &sc->lock, 60*hz); 373 return (error); 374 } 375 376 static void 377 seq_timeout(void *addr) 378 { 379 struct sequencer_softc *sc = addr; 380 proc_t *p; 381 pid_t pid; 382 383 DPRINTFN(4, ("seq_timeout: %p\n", sc)); 384 385 mutex_enter(&sc->lock); 386 if (sc->timeout == 0) { 387 mutex_spin_exit(&sc->lock); 388 return; 389 } 390 sc->timeout = 0; 391 seq_startoutput(sc); 392 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 393 mutex_exit(&sc->lock); 394 return; 395 } 396 cv_broadcast(&sc->wchan); 397 selnotify(&sc->wsel, 0, NOTE_SUBMIT); 398 if ((pid = sc->async) != 0) { 399 mutex_enter(proc_lock); 400 if ((p = proc_find(pid)) != NULL) 401 psignal(p, SIGIO); 402 mutex_exit(proc_lock); 403 } 404 mutex_exit(&sc->lock); 405 } 406 407 static void 408 seq_startoutput(struct sequencer_softc *sc) 409 { 410 struct sequencer_queue *q = &sc->outq; 411 seq_event_t cmd; 412 413 KASSERT(mutex_owned(&sc->lock)); 414 415 if (sc->timeout) 416 return; 417 DPRINTFN(4, ("seq_startoutput: %p, len=%d\n", sc, SEQ_QLEN(q))); 418 while (!SEQ_QEMPTY(q) && !sc->timeout) { 419 SEQ_QGET(q, cmd); 420 seq_do_command(sc, &cmd); 421 } 422 } 423 424 static int 425 sequencerclose(dev_t dev, int flags, int ifmt, struct lwp *l) 426 { 427 struct sequencer_softc *sc; 428 struct midi_softc *msc; 429 int unit, error; 430 431 DPRINTF(("sequencerclose: %"PRIx64"\n", dev)); 432 433 if ((error = sequencer_enter(dev, &sc)) != 0) 434 return error; 435 seq_drain(sc); 436 if (sc->timeout) { 437 callout_halt(&sc->sc_callout, &sc->lock); 438 sc->timeout = 0; 439 } 440 /* Bin input from MIDI devices. */ 441 for (unit = 0; unit < sc->nmidi; unit++) { 442 msc = sc->devs[unit]->msc; 443 mutex_enter(msc->lock); 444 msc->seqopen = 0; 445 mutex_exit(msc->lock); 446 } 447 mutex_exit(&sc->lock); 448 449 for (unit = 0; unit < sc->nmidi; unit++) 450 if (sc->devs[unit] != NULL) 451 midiseq_close(sc->devs[unit]); 452 if (sc->devs != NULL) { 453 KASSERT(sc->ndevs > 0); 454 kmem_free(sc->devs, sc->ndevs * sizeof(struct midi_dev *)); 455 sc->devs = NULL; 456 } 457 458 mutex_enter(&sc->lock); 459 sc->isopen = 0; 460 sequencer_exit(sc); 461 462 DPRINTF(("sequencerclose: %"PRIx64" done\n", dev)); 463 464 return (0); 465 } 466 467 static int 468 seq_input_event(struct sequencer_softc *sc, seq_event_t *cmd) 469 { 470 struct sequencer_queue *q; 471 472 KASSERT(mutex_owned(&sc->lock)); 473 474 DPRINTFN(2, ("seq_input_event: %02x %02x %02x %02x %02x " 475 "%02x %02x %02x\n", cmd->tag, 476 cmd->unknown.byte[0], cmd->unknown.byte[1], 477 cmd->unknown.byte[2], cmd->unknown.byte[3], 478 cmd->unknown.byte[4], cmd->unknown.byte[5], 479 cmd->unknown.byte[6])); 480 q = &sc->inq; 481 if (SEQ_QFULL(q)) 482 return (ENOMEM); 483 SEQ_QPUT(q, *cmd); 484 cv_broadcast(&sc->rchan); 485 selnotify(&sc->rsel, 0, NOTE_SUBMIT); 486 if (sc->async != 0) { 487 proc_t *p; 488 489 mutex_enter(proc_lock); 490 if ((p = proc_find(sc->async)) != NULL) 491 psignal(p, SIGIO); 492 mutex_exit(proc_lock); 493 } 494 return 0; 495 } 496 497 static void 498 seq_softintr(void *addr) 499 { 500 struct sequencer_softc *sc; 501 struct timeval now; 502 seq_event_t ev; 503 int status, chan, unit; 504 sequencer_pcqitem_t qi; 505 u_long t; 506 507 sc = addr; 508 509 mutex_enter(&sc->lock); 510 511 qi.qi_ptr = pcq_get(sc->pcq); 512 if (qi.qi_ptr == NULL) { 513 mutex_exit(&sc->lock); 514 return; 515 } 516 KASSERT((qi.qi_msg[3] & 0x80) != 0); 517 unit = qi.qi_msg[3] & ~0x80; 518 status = MIDI_GET_STATUS(qi.qi_msg[0]); 519 chan = MIDI_GET_CHAN(qi.qi_msg[0]); 520 switch (status) { 521 case MIDI_NOTEON: /* midi(4) always canonicalizes hidden note-off */ 522 ev = SEQ_MK_CHN(NOTEON, .device=unit, .channel=chan, 523 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 524 break; 525 case MIDI_NOTEOFF: 526 ev = SEQ_MK_CHN(NOTEOFF, .device=unit, .channel=chan, 527 .key=qi.qi_msg[1], .velocity=qi.qi_msg[2]); 528 break; 529 case MIDI_KEY_PRESSURE: 530 ev = SEQ_MK_CHN(KEY_PRESSURE, .device=unit, .channel=chan, 531 .key=qi.qi_msg[1], .pressure=qi.qi_msg[2]); 532 break; 533 case MIDI_CTL_CHANGE: /* XXX not correct for MSB */ 534 ev = SEQ_MK_CHN(CTL_CHANGE, .device=unit, .channel=chan, 535 .controller=qi.qi_msg[1], .value=qi.qi_msg[2]); 536 break; 537 case MIDI_PGM_CHANGE: 538 ev = SEQ_MK_CHN(PGM_CHANGE, .device=unit, .channel=chan, 539 .program=qi.qi_msg[1]); 540 break; 541 case MIDI_CHN_PRESSURE: 542 ev = SEQ_MK_CHN(CHN_PRESSURE, .device=unit, .channel=chan, 543 .pressure=qi.qi_msg[1]); 544 break; 545 case MIDI_PITCH_BEND: 546 ev = SEQ_MK_CHN(PITCH_BEND, .device=unit, .channel=chan, 547 .value=(qi.qi_msg[1] & 0x7f) | ((qi.qi_msg[2] & 0x7f) << 7)); 548 break; 549 default: /* this is now the point where MIDI_ACKs disappear */ 550 mutex_exit(&sc->lock); 551 return; 552 } 553 microtime(&now); 554 if (!sc->timer.running) 555 now = sc->timer.stoptime; 556 SUBTIMEVAL(&now, &sc->timer.reftime); 557 t = now.tv_sec * 1000000 + now.tv_usec; 558 t /= sc->timer.usperdiv; 559 t += sc->timer.divs_lastchange; 560 if (t != sc->input_stamp) { 561 seq_input_event(sc, &SEQ_MK_TIMING(WAIT_ABS, .divisions=t)); 562 sc->input_stamp = t; /* XXX wha hoppen if timer is reset? */ 563 } 564 seq_input_event(sc, &ev); 565 mutex_exit(&sc->lock); 566 } 567 568 static int 569 sequencerread(dev_t dev, struct uio *uio, int ioflag) 570 { 571 struct sequencer_softc *sc; 572 struct sequencer_queue *q; 573 seq_event_t ev; 574 int error; 575 576 DPRINTFN(20, ("sequencerread: %"PRIx64", count=%d, ioflag=%x\n", 577 dev, (int)uio->uio_resid, ioflag)); 578 579 if ((error = sequencer_enter(dev, &sc)) != 0) 580 return error; 581 q = &sc->inq; 582 583 if (sc->mode == SEQ_OLD) { 584 sequencer_exit(sc); 585 DPRINTFN(-1,("sequencerread: old read\n")); 586 return EINVAL; /* XXX unimplemented */ 587 } 588 while (SEQ_QEMPTY(q)) { 589 if (ioflag & IO_NDELAY) { 590 error = EWOULDBLOCK; 591 break; 592 } 593 /* Drop lock to allow concurrent read/write. */ 594 KASSERT(sc->dvlock != 0); 595 sc->dvlock--; 596 error = cv_wait_sig(&sc->rchan, &sc->lock); 597 while (sc->dvlock != 0) { 598 cv_wait(&sc->lchan, &sc->lock); 599 } 600 sc->dvlock++; 601 if (error) { 602 break; 603 } 604 } 605 while (uio->uio_resid >= sizeof(ev) && !error && !SEQ_QEMPTY(q)) { 606 SEQ_QGET(q, ev); 607 mutex_exit(&sc->lock); 608 error = uiomove(&ev, sizeof(ev), uio); 609 mutex_enter(&sc->lock); 610 } 611 sequencer_exit(sc); 612 return error; 613 } 614 615 static int 616 sequencerwrite(dev_t dev, struct uio *uio, int ioflag) 617 { 618 struct sequencer_softc *sc; 619 struct sequencer_queue *q; 620 int error; 621 seq_event_t cmdbuf; 622 int size; 623 624 DPRINTFN(2, ("sequencerwrite: %"PRIx64", count=%d\n", dev, 625 (int)uio->uio_resid)); 626 627 if ((error = sequencer_enter(dev, &sc)) != 0) 628 return error; 629 q = &sc->outq; 630 631 size = sc->mode == SEQ_NEW ? sizeof cmdbuf : SEQOLD_CMDSIZE; 632 while (uio->uio_resid >= size && error == 0) { 633 mutex_exit(&sc->lock); 634 error = uiomove(&cmdbuf, size, uio); 635 if (error == 0) { 636 if (sc->mode == SEQ_OLD && seq_to_new(&cmdbuf, uio)) { 637 mutex_enter(&sc->lock); 638 continue; 639 } 640 if (cmdbuf.tag == SEQ_FULLSIZE) { 641 /* We do it like OSS does, asynchronously */ 642 error = seq_do_fullsize(sc, &cmdbuf, uio); 643 if (error == 0) { 644 mutex_enter(&sc->lock); 645 continue; 646 } 647 } 648 } 649 mutex_enter(&sc->lock); 650 if (error != 0) { 651 break; 652 } 653 while (SEQ_QFULL(q)) { 654 seq_startoutput(sc); 655 if (SEQ_QFULL(q)) { 656 if (ioflag & IO_NDELAY) { 657 error = EWOULDBLOCK; 658 break; 659 } 660 error = cv_wait_sig(&sc->wchan, &sc->lock); 661 if (error) { 662 break; 663 } 664 } 665 } 666 if (error == 0) { 667 SEQ_QPUT(q, cmdbuf); 668 } 669 } 670 if (error == 0) { 671 seq_startoutput(sc); 672 } else { 673 DPRINTFN(2, ("sequencerwrite: error=%d\n", error)); 674 } 675 sequencer_exit(sc); 676 return error; 677 } 678 679 static int 680 sequencerioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 681 { 682 struct sequencer_softc *sc; 683 struct synth_info *si; 684 struct midi_dev *md; 685 int devno, error, t; 686 struct timeval now; 687 u_long tx; 688 689 DPRINTFN(2, ("sequencerioctl: %"PRIx64" cmd=0x%08lx\n", dev, cmd)); 690 691 if ((error = sequencer_enter(dev, &sc)) != 0) 692 return error; 693 switch (cmd) { 694 case FIONBIO: 695 /* All handled in the upper FS layer. */ 696 break; 697 698 case FIOASYNC: 699 if (*(int *)addr) { 700 if (sc->async != 0) 701 return EBUSY; 702 sc->async = curproc->p_pid; 703 DPRINTF(("sequencer_ioctl: FIOASYNC %d\n", 704 sc->async)); 705 } else { 706 sc->async = 0; 707 } 708 break; 709 710 case SEQUENCER_RESET: 711 seq_reset(sc); 712 break; 713 714 case SEQUENCER_PANIC: 715 seq_reset(sc); 716 /* Do more? OSS doesn't */ 717 break; 718 719 case SEQUENCER_SYNC: 720 if (sc->flags != FREAD) 721 seq_drain(sc); 722 break; 723 724 case SEQUENCER_INFO: 725 si = (struct synth_info*)addr; 726 devno = si->device; 727 if (devno < 0 || devno >= sc->nmidi) { 728 error = EINVAL; 729 break; 730 } 731 md = sc->devs[devno]; 732 strncpy(si->name, md->name, sizeof si->name); 733 si->synth_type = SYNTH_TYPE_MIDI; 734 si->synth_subtype = md->subtype; 735 si->nr_voices = md->nr_voices; 736 si->instr_bank_size = md->instr_bank_size; 737 si->capabilities = md->capabilities; 738 break; 739 740 case SEQUENCER_NRSYNTHS: 741 *(int *)addr = sc->nmidi; 742 break; 743 744 case SEQUENCER_NRMIDIS: 745 *(int *)addr = sc->nmidi; 746 break; 747 748 case SEQUENCER_OUTOFBAND: 749 DPRINTFN(3, ("sequencer_ioctl: OOB=%02x %02x %02x %02x %02x %02x %02x %02x\n", 750 *(u_char *)addr, *((u_char *)addr+1), 751 *((u_char *)addr+2), *((u_char *)addr+3), 752 *((u_char *)addr+4), *((u_char *)addr+5), 753 *((u_char *)addr+6), *((u_char *)addr+7))); 754 if ((sc->flags & FWRITE) == 0) { 755 error = EBADF; 756 } else { 757 error = seq_do_command(sc, (seq_event_t *)addr); 758 } 759 break; 760 761 case SEQUENCER_TMR_TIMEBASE: 762 t = *(int *)addr; 763 if (t < 1) 764 t = 1; 765 if (t > 10000) 766 t = 10000; 767 *(int *)addr = t; 768 sc->timer.timebase_divperbeat = t; 769 sc->timer.divs_lastchange = sc->timer.divs_lastevent; 770 microtime(&sc->timer.reftime); 771 RECALC_USPERDIV(&sc->timer); 772 break; 773 774 case SEQUENCER_TMR_START: 775 error = seq_do_timing(sc, &SEQ_MK_TIMING(START)); 776 break; 777 778 case SEQUENCER_TMR_STOP: 779 error = seq_do_timing(sc, &SEQ_MK_TIMING(STOP)); 780 break; 781 782 case SEQUENCER_TMR_CONTINUE: 783 error = seq_do_timing(sc, &SEQ_MK_TIMING(CONTINUE)); 784 break; 785 786 case SEQUENCER_TMR_TEMPO: 787 error = seq_do_timing(sc, 788 &SEQ_MK_TIMING(TEMPO, .bpm=*(int *)addr)); 789 if (error == 0) 790 *(int *)addr = sc->timer.tempo_beatpermin; 791 break; 792 793 case SEQUENCER_TMR_SOURCE: 794 *(int *)addr = SEQUENCER_TMR_INTERNAL; 795 break; 796 797 case SEQUENCER_TMR_METRONOME: 798 /* noop */ 799 break; 800 801 case SEQUENCER_THRESHOLD: 802 t = SEQ_MAXQ - *(int *)addr / sizeof (seq_event_rec); 803 if (t < 1) 804 t = 1; 805 if (t > SEQ_MAXQ) 806 t = SEQ_MAXQ; 807 sc->lowat = t; 808 break; 809 810 case SEQUENCER_CTRLRATE: 811 *(int *)addr = (sc->timer.tempo_beatpermin 812 *sc->timer.timebase_divperbeat + 30) / 60; 813 break; 814 815 case SEQUENCER_GETTIME: 816 microtime(&now); 817 SUBTIMEVAL(&now, &sc->timer.reftime); 818 tx = now.tv_sec * 1000000 + now.tv_usec; 819 tx /= sc->timer.usperdiv; 820 tx += sc->timer.divs_lastchange; 821 *(int *)addr = tx; 822 break; 823 824 default: 825 DPRINTFN(-1,("sequencer_ioctl: unimpl %08lx\n", cmd)); 826 error = EINVAL; 827 break; 828 } 829 sequencer_exit(sc); 830 831 return error; 832 } 833 834 static int 835 sequencerpoll(dev_t dev, int events, struct lwp *l) 836 { 837 struct sequencer_softc *sc; 838 int revents = 0; 839 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 840 return ENXIO; 841 842 DPRINTF(("sequencerpoll: %p events=0x%x\n", sc, events)); 843 844 mutex_enter(&sc->lock); 845 if (events & (POLLIN | POLLRDNORM)) 846 if ((sc->flags&FREAD) && !SEQ_QEMPTY(&sc->inq)) 847 revents |= events & (POLLIN | POLLRDNORM); 848 849 if (events & (POLLOUT | POLLWRNORM)) 850 if ((sc->flags&FWRITE) && SEQ_QLEN(&sc->outq) < sc->lowat) 851 revents |= events & (POLLOUT | POLLWRNORM); 852 853 if (revents == 0) { 854 if ((sc->flags&FREAD) && (events & (POLLIN | POLLRDNORM))) 855 selrecord(l, &sc->rsel); 856 857 if ((sc->flags&FWRITE) && (events & (POLLOUT | POLLWRNORM))) 858 selrecord(l, &sc->wsel); 859 } 860 mutex_exit(&sc->lock); 861 862 return revents; 863 } 864 865 static void 866 filt_sequencerrdetach(struct knote *kn) 867 { 868 struct sequencer_softc *sc = kn->kn_hook; 869 870 mutex_enter(&sc->lock); 871 SLIST_REMOVE(&sc->rsel.sel_klist, kn, knote, kn_selnext); 872 mutex_exit(&sc->lock); 873 } 874 875 static int 876 filt_sequencerread(struct knote *kn, long hint) 877 { 878 struct sequencer_softc *sc = kn->kn_hook; 879 int rv; 880 881 if (hint != NOTE_SUBMIT) { 882 mutex_enter(&sc->lock); 883 } 884 if (SEQ_QEMPTY(&sc->inq)) { 885 rv = 0; 886 } else { 887 kn->kn_data = sizeof(seq_event_rec); 888 rv = 1; 889 } 890 if (hint != NOTE_SUBMIT) { 891 mutex_exit(&sc->lock); 892 } 893 return rv; 894 } 895 896 static const struct filterops sequencerread_filtops = 897 { 1, NULL, filt_sequencerrdetach, filt_sequencerread }; 898 899 static void 900 filt_sequencerwdetach(struct knote *kn) 901 { 902 struct sequencer_softc *sc = kn->kn_hook; 903 904 mutex_enter(&sc->lock); 905 SLIST_REMOVE(&sc->wsel.sel_klist, kn, knote, kn_selnext); 906 mutex_exit(&sc->lock); 907 } 908 909 static int 910 filt_sequencerwrite(struct knote *kn, long hint) 911 { 912 struct sequencer_softc *sc = kn->kn_hook; 913 int rv; 914 915 if (hint != NOTE_SUBMIT) { 916 mutex_enter(&sc->lock); 917 } 918 if (SEQ_QLEN(&sc->outq) >= sc->lowat) { 919 rv = 0; 920 } else { 921 kn->kn_data = sizeof(seq_event_rec); 922 rv = 1; 923 } 924 if (hint != NOTE_SUBMIT) { 925 mutex_exit(&sc->lock); 926 } 927 return rv; 928 } 929 930 static const struct filterops sequencerwrite_filtops = 931 { 1, NULL, filt_sequencerwdetach, filt_sequencerwrite }; 932 933 static int 934 sequencerkqfilter(dev_t dev, struct knote *kn) 935 { 936 struct sequencer_softc *sc; 937 struct klist *klist; 938 if ((sc = sequencerget(SEQUENCERUNIT(dev))) == NULL) 939 return ENXIO; 940 941 switch (kn->kn_filter) { 942 case EVFILT_READ: 943 klist = &sc->rsel.sel_klist; 944 kn->kn_fop = &sequencerread_filtops; 945 break; 946 947 case EVFILT_WRITE: 948 klist = &sc->wsel.sel_klist; 949 kn->kn_fop = &sequencerwrite_filtops; 950 break; 951 952 default: 953 return (EINVAL); 954 } 955 956 kn->kn_hook = sc; 957 958 mutex_enter(&sc->lock); 959 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 960 mutex_exit(&sc->lock); 961 962 return (0); 963 } 964 965 static void 966 seq_reset(struct sequencer_softc *sc) 967 { 968 int i, chn; 969 struct midi_dev *md; 970 971 KASSERT(mutex_owned(&sc->lock)); 972 973 if ( !(sc->flags & FWRITE) ) 974 return; 975 for (i = 0; i < sc->nmidi; i++) { 976 md = sc->devs[i]; 977 midiseq_reset(md); 978 for (chn = 0; chn < MAXCHAN; chn++) { 979 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 980 .controller=MIDI_CTRL_NOTES_OFF)); 981 midiseq_ctlchange(md, chn, &SEQ_MK_CHN(CTL_CHANGE, 982 .controller=MIDI_CTRL_RESET)); 983 midiseq_pitchbend(md, chn, &SEQ_MK_CHN(PITCH_BEND, 984 .value=MIDI_BEND_NEUTRAL)); 985 } 986 } 987 } 988 989 static int 990 seq_do_command(struct sequencer_softc *sc, seq_event_t *b) 991 { 992 int dev; 993 994 KASSERT(mutex_owned(&sc->lock)); 995 996 DPRINTFN(4, ("seq_do_command: %p cmd=0x%02x\n", sc, b->timing.op)); 997 998 switch(b->tag) { 999 case SEQ_LOCAL: 1000 return seq_do_local(sc, b); 1001 case SEQ_TIMING: 1002 return seq_do_timing(sc, b); 1003 case SEQ_CHN_VOICE: 1004 return seq_do_chnvoice(sc, b); 1005 case SEQ_CHN_COMMON: 1006 return seq_do_chncommon(sc, b); 1007 case SEQ_SYSEX: 1008 return seq_do_sysex(sc, b); 1009 /* COMPAT */ 1010 case SEQOLD_MIDIPUTC: 1011 dev = b->putc.device; 1012 if (dev < 0 || dev >= sc->nmidi) 1013 return (ENXIO); 1014 return midiseq_out(sc->devs[dev], &b->putc.byte, 1, 0); 1015 default: 1016 DPRINTFN(-1,("seq_do_command: unimpl command %02x\n", b->tag)); 1017 return (EINVAL); 1018 } 1019 } 1020 1021 static int 1022 seq_do_chnvoice(struct sequencer_softc *sc, seq_event_t *b) 1023 { 1024 int dev; 1025 int error; 1026 struct midi_dev *md; 1027 1028 KASSERT(mutex_owned(&sc->lock)); 1029 1030 dev = b->voice.device; 1031 if (dev < 0 || dev >= sc->nmidi || 1032 b->voice.channel > 15 || 1033 b->voice.key >= SEQ_NOTE_MAX) 1034 return ENXIO; 1035 md = sc->devs[dev]; 1036 switch(b->voice.op) { 1037 case MIDI_NOTEON: /* no need to special-case hidden noteoff here */ 1038 error = midiseq_noteon(md, b->voice.channel, b->voice.key, b); 1039 break; 1040 case MIDI_NOTEOFF: 1041 error = midiseq_noteoff(md, b->voice.channel, b->voice.key, b); 1042 break; 1043 case MIDI_KEY_PRESSURE: 1044 error = midiseq_keypressure(md, 1045 b->voice.channel, b->voice.key, b); 1046 break; 1047 default: 1048 DPRINTFN(-1,("seq_do_chnvoice: unimpl command %02x\n", 1049 b->voice.op)); 1050 error = EINVAL; 1051 break; 1052 } 1053 return error; 1054 } 1055 1056 static int 1057 seq_do_chncommon(struct sequencer_softc *sc, seq_event_t *b) 1058 { 1059 int dev; 1060 int error; 1061 struct midi_dev *md; 1062 1063 KASSERT(mutex_owned(&sc->lock)); 1064 1065 dev = b->common.device; 1066 if (dev < 0 || dev >= sc->nmidi || 1067 b->common.channel > 15) 1068 return ENXIO; 1069 md = sc->devs[dev]; 1070 DPRINTFN(2,("seq_do_chncommon: %02x\n", b->common.op)); 1071 1072 error = 0; 1073 switch(b->common.op) { 1074 case MIDI_PGM_CHANGE: 1075 error = midiseq_pgmchange(md, b->common.channel, b); 1076 break; 1077 case MIDI_CTL_CHANGE: 1078 error = midiseq_ctlchange(md, b->common.channel, b); 1079 break; 1080 case MIDI_PITCH_BEND: 1081 error = midiseq_pitchbend(md, b->common.channel, b); 1082 break; 1083 case MIDI_CHN_PRESSURE: 1084 error = midiseq_chnpressure(md, b->common.channel, b); 1085 break; 1086 default: 1087 DPRINTFN(-1,("seq_do_chncommon: unimpl command %02x\n", 1088 b->common.op)); 1089 error = EINVAL; 1090 break; 1091 } 1092 return error; 1093 } 1094 1095 static int 1096 seq_do_local(struct sequencer_softc *sc, seq_event_t *b) 1097 { 1098 1099 KASSERT(mutex_owned(&sc->lock)); 1100 1101 return (EINVAL); 1102 } 1103 1104 static int 1105 seq_do_sysex(struct sequencer_softc *sc, seq_event_t *b) 1106 { 1107 int dev, i; 1108 struct midi_dev *md; 1109 uint8_t *bf = b->sysex.buffer; 1110 1111 KASSERT(mutex_owned(&sc->lock)); 1112 1113 dev = b->sysex.device; 1114 if (dev < 0 || dev >= sc->nmidi) 1115 return (ENXIO); 1116 DPRINTF(("seq_do_sysex: dev=%d\n", dev)); 1117 md = sc->devs[dev]; 1118 1119 if (!md->doingsysex) { 1120 midiseq_out(md, (uint8_t[]){MIDI_SYSEX_START}, 1, 0); 1121 md->doingsysex = 1; 1122 } 1123 1124 for (i = 0; i < 6 && bf[i] != 0xff; i++) 1125 ; 1126 midiseq_out(md, bf, i, 0); 1127 if (i < 6 || (i > 0 && bf[i-1] == MIDI_SYSEX_END)) 1128 md->doingsysex = 0; 1129 return 0; 1130 } 1131 1132 static void 1133 seq_timer_waitabs(struct sequencer_softc *sc, uint32_t divs) 1134 { 1135 struct timeval when; 1136 long long usec; 1137 struct syn_timer *t; 1138 int ticks; 1139 1140 KASSERT(mutex_owned(&sc->lock)); 1141 1142 t = &sc->timer; 1143 t->divs_lastevent = divs; 1144 divs -= t->divs_lastchange; 1145 usec = (long long)divs * (long long)t->usperdiv; /* convert to usec */ 1146 when.tv_sec = usec / 1000000; 1147 when.tv_usec = usec % 1000000; 1148 DPRINTFN(4, ("seq_timer_waitabs: adjdivs=%d, sleep when=%"PRId64".%06"PRId64, 1149 divs, when.tv_sec, (uint64_t)when.tv_usec)); 1150 ADDTIMEVAL(&when, &t->reftime); /* abstime for end */ 1151 ticks = tvhzto(&when); 1152 DPRINTFN(4, (" when+start=%"PRId64".%06"PRId64", tick=%d\n", 1153 when.tv_sec, (uint64_t)when.tv_usec, ticks)); 1154 if (ticks > 0) { 1155 #ifdef DIAGNOSTIC 1156 if (ticks > 20 * hz) { 1157 /* Waiting more than 20s */ 1158 printf("seq_timer_waitabs: funny ticks=%d, " 1159 "usec=%lld\n", ticks, usec); 1160 } 1161 #endif 1162 sc->timeout = 1; 1163 callout_reset(&sc->sc_callout, ticks, 1164 seq_timeout, sc); 1165 } 1166 #ifdef SEQUENCER_DEBUG 1167 else if (tick < 0) 1168 DPRINTF(("seq_timer_waitabs: ticks = %d\n", ticks)); 1169 #endif 1170 } 1171 1172 static int 1173 seq_do_timing(struct sequencer_softc *sc, seq_event_t *b) 1174 { 1175 struct syn_timer *t = &sc->timer; 1176 struct timeval when; 1177 int error; 1178 1179 KASSERT(mutex_owned(&sc->lock)); 1180 1181 error = 0; 1182 switch(b->timing.op) { 1183 case TMR_WAIT_REL: 1184 seq_timer_waitabs(sc, 1185 b->t_WAIT_REL.divisions + t->divs_lastevent); 1186 break; 1187 case TMR_WAIT_ABS: 1188 seq_timer_waitabs(sc, b->t_WAIT_ABS.divisions); 1189 break; 1190 case TMR_START: 1191 microtime(&t->reftime); 1192 t->divs_lastevent = t->divs_lastchange = 0; 1193 t->running = 1; 1194 break; 1195 case TMR_STOP: 1196 microtime(&t->stoptime); 1197 t->running = 0; 1198 break; 1199 case TMR_CONTINUE: 1200 if (t->running) 1201 break; 1202 microtime(&when); 1203 SUBTIMEVAL(&when, &t->stoptime); 1204 ADDTIMEVAL(&t->reftime, &when); 1205 t->running = 1; 1206 break; 1207 case TMR_TEMPO: 1208 /* bpm is unambiguously MIDI clocks per minute / 24 */ 1209 /* (24 MIDI clocks are usually but not always a quarter note) */ 1210 if (b->t_TEMPO.bpm < 8) /* where are these limits specified? */ 1211 t->tempo_beatpermin = 8; 1212 else if (b->t_TEMPO.bpm > 360) /* ? */ 1213 t->tempo_beatpermin = 360; 1214 else 1215 t->tempo_beatpermin = b->t_TEMPO.bpm; 1216 t->divs_lastchange = t->divs_lastevent; 1217 microtime(&t->reftime); 1218 RECALC_USPERDIV(t); 1219 break; 1220 case TMR_ECHO: 1221 error = seq_input_event(sc, b); 1222 break; 1223 case TMR_RESET: 1224 t->divs_lastevent = t->divs_lastchange = 0; 1225 microtime(&t->reftime); 1226 break; 1227 case TMR_SPP: 1228 case TMR_TIMESIG: 1229 DPRINTF(("seq_do_timing: unimplemented %02x\n", b->timing.op)); 1230 error = EINVAL; /* not quite accurate... */ 1231 break; 1232 default: 1233 DPRINTF(("seq_timer: unknown %02x\n", b->timing.op)); 1234 error = EINVAL; 1235 break; 1236 } 1237 return (error); 1238 } 1239 1240 static int 1241 seq_do_fullsize(struct sequencer_softc *sc, seq_event_t *b, struct uio *uio) 1242 { 1243 struct sysex_info sysex; 1244 u_int dev; 1245 1246 #ifdef DIAGNOSTIC 1247 if (sizeof(seq_event_rec) != SEQ_SYSEX_HDRSIZE) { 1248 printf("seq_do_fullsize: sysex size ??\n"); 1249 return EINVAL; 1250 } 1251 #endif 1252 memcpy(&sysex, b, sizeof sysex); 1253 dev = sysex.device_no; 1254 if (/* dev < 0 || */ dev >= sc->nmidi) 1255 return (ENXIO); 1256 DPRINTFN(2, ("seq_do_fullsize: fmt=%04x, dev=%d, len=%d\n", 1257 sysex.key, dev, sysex.len)); 1258 return (midiseq_loadpatch(sc->devs[dev], &sysex, uio)); 1259 } 1260 1261 /* 1262 * Convert an old sequencer event to a new one. 1263 * NOTE: on entry, *ev may contain valid data only in the first 4 bytes. 1264 * That may be true even on exit (!) in the case of SEQOLD_MIDIPUTC; the 1265 * caller will only look at the first bytes in that case anyway. Ugly? Sure. 1266 */ 1267 static int 1268 seq_to_new(seq_event_t *ev, struct uio *uio) 1269 { 1270 int cmd, chan, note, parm; 1271 uint32_t tmp_delay; 1272 int error; 1273 uint8_t *bfp; 1274 1275 cmd = ev->tag; 1276 bfp = ev->unknown.byte; 1277 chan = *bfp++; 1278 note = *bfp++; 1279 parm = *bfp++; 1280 DPRINTFN(3, ("seq_to_new: 0x%02x %d %d %d\n", cmd, chan, note, parm)); 1281 1282 if (cmd >= 0x80) { 1283 /* Fill the event record */ 1284 if (uio->uio_resid >= sizeof *ev - SEQOLD_CMDSIZE) { 1285 error = uiomove(bfp, sizeof *ev - SEQOLD_CMDSIZE, uio); 1286 if (error) 1287 return error; 1288 } else 1289 return EINVAL; 1290 } 1291 1292 switch(cmd) { 1293 case SEQOLD_NOTEOFF: 1294 /* 1295 * What's with the SEQ_NOTE_XXX? In OSS this seems to have 1296 * been undocumented magic for messing with the overall volume 1297 * of a 'voice', equated precariously with 'channel' and 1298 * pretty much unimplementable except by directly frobbing a 1299 * synth chip. For us, who treat everything as interfaced over 1300 * MIDI, this will just be unceremoniously discarded as 1301 * invalid in midiseq_noteoff, making the whole event an 1302 * elaborate no-op, and that doesn't seem to be any different 1303 * from what happens on linux with a MIDI-interfaced device, 1304 * by the way. The moral is ... use the new /dev/music API, ok? 1305 */ 1306 *ev = SEQ_MK_CHN(NOTEOFF, .device=0, .channel=chan, 1307 .key=SEQ_NOTE_XXX, .velocity=parm); 1308 break; 1309 case SEQOLD_NOTEON: 1310 *ev = SEQ_MK_CHN(NOTEON, 1311 .device=0, .channel=chan, .key=note, .velocity=parm); 1312 break; 1313 case SEQOLD_WAIT: 1314 /* 1315 * This event cannot even /exist/ on non-littleendian machines, 1316 * and so help me, that's exactly the way OSS defined it. 1317 * Also, the OSS programmer's guide states (p. 74, v1.11) 1318 * that seqold time units are system clock ticks, unlike 1319 * the new 'divisions' which are determined by timebase. In 1320 * that case we would need to do scaling here - but no such 1321 * behavior is visible in linux either--which also treats this 1322 * value, surprisingly, as an absolute, not relative, time. 1323 * My guess is that this event has gone unused so long that 1324 * nobody could agree we got it wrong no matter what we do. 1325 */ 1326 tmp_delay = *(uint32_t *)ev >> 8; 1327 *ev = SEQ_MK_TIMING(WAIT_ABS, .divisions=tmp_delay); 1328 break; 1329 case SEQOLD_SYNCTIMER: 1330 /* 1331 * The TMR_RESET event is not defined in any OSS materials 1332 * I can find; it may have been invented here just to provide 1333 * an accurate _to_new translation of this event. 1334 */ 1335 *ev = SEQ_MK_TIMING(RESET); 1336 break; 1337 case SEQOLD_PGMCHANGE: 1338 *ev = SEQ_MK_CHN(PGM_CHANGE, 1339 .device=0, .channel=chan, .program=note); 1340 break; 1341 case SEQOLD_MIDIPUTC: 1342 break; /* interpret in normal mode */ 1343 case SEQOLD_ECHO: 1344 case SEQOLD_PRIVATE: 1345 case SEQOLD_EXTENDED: 1346 default: 1347 DPRINTF(("seq_to_new: not impl 0x%02x\n", cmd)); 1348 return EINVAL; 1349 /* In case new-style events show up */ 1350 case SEQ_TIMING: 1351 case SEQ_CHN_VOICE: 1352 case SEQ_CHN_COMMON: 1353 case SEQ_FULLSIZE: 1354 break; 1355 } 1356 return 0; 1357 } 1358 1359 /**********************************************/ 1360 1361 void 1362 midiseq_in(struct midi_dev *md, u_char *msg, int len) 1363 { 1364 struct sequencer_softc *sc; 1365 sequencer_pcqitem_t qi; 1366 1367 DPRINTFN(2, ("midiseq_in: %p %02x %02x %02x\n", 1368 md, msg[0], msg[1], msg[2])); 1369 1370 sc = md->seq; 1371 1372 qi.qi_msg[0] = msg[0]; 1373 qi.qi_msg[1] = msg[1]; 1374 qi.qi_msg[2] = msg[2]; 1375 qi.qi_msg[3] = md->unit | 0x80; /* ensure non-zero value of qi_ptr */ 1376 pcq_put(sc->pcq, qi.qi_ptr); 1377 softint_schedule(sc->sih); 1378 } 1379 1380 static struct midi_dev * 1381 midiseq_open(int unit, int flags) 1382 { 1383 extern struct cfdriver midi_cd; 1384 int error; 1385 struct midi_dev *md; 1386 struct midi_softc *sc; 1387 struct midi_info mi; 1388 int major; 1389 dev_t dev; 1390 vnode_t *vp; 1391 int oflags; 1392 1393 major = devsw_name2chr("midi", NULL, 0); 1394 dev = makedev(major, unit); 1395 1396 DPRINTFN(2, ("midiseq_open: %d %d\n", unit, flags)); 1397 1398 error = cdevvp(dev, &vp); 1399 if (error) 1400 return NULL; 1401 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1402 error = VOP_OPEN(vp, flags, kauth_cred_get()); 1403 VOP_UNLOCK(vp); 1404 if (error) { 1405 vrele(vp); 1406 return NULL; 1407 } 1408 1409 /* Only after we have acquired reference via VOP_OPEN(). */ 1410 midi_getinfo(dev, &mi); 1411 oflags = flags; 1412 if ((mi.props & MIDI_PROP_CAN_INPUT) == 0) 1413 flags &= ~FREAD; 1414 if ((flags & (FREAD|FWRITE)) == 0) { 1415 VOP_CLOSE(vp, oflags, kauth_cred_get()); 1416 vrele(vp); 1417 return NULL; 1418 } 1419 1420 sc = device_lookup_private(&midi_cd, unit); 1421 md = kmem_zalloc(sizeof(*md), KM_SLEEP); 1422 md->msc = sc; 1423 md->unit = unit; 1424 md->name = mi.name; 1425 md->subtype = 0; 1426 md->nr_voices = 128; /* XXX */ 1427 md->instr_bank_size = 128; /* XXX */ 1428 md->vp = vp; 1429 if (mi.props & MIDI_PROP_CAN_INPUT) 1430 md->capabilities |= SYNTH_CAP_INPUT; 1431 sc->seq_md = md; 1432 return (md); 1433 } 1434 1435 static void 1436 midiseq_close(struct midi_dev *md) 1437 { 1438 DPRINTFN(2, ("midiseq_close: %d\n", md->unit)); 1439 (void)vn_close(md->vp, 0, kauth_cred_get()); 1440 kmem_free(md, sizeof(*md)); 1441 } 1442 1443 static void 1444 midiseq_reset(struct midi_dev *md) 1445 { 1446 /* XXX send GM reset? */ 1447 DPRINTFN(3, ("midiseq_reset: %d\n", md->unit)); 1448 } 1449 1450 static int 1451 midiseq_out(struct midi_dev *md, u_char *bf, u_int cc, int chk) 1452 { 1453 DPRINTFN(5, ("midiseq_out: m=%p, unit=%d, bf[0]=0x%02x, cc=%d\n", 1454 md->msc, md->unit, bf[0], cc)); 1455 1456 /* midi(4) does running status compression where appropriate. */ 1457 return midi_writebytes(md->unit, bf, cc); 1458 } 1459 1460 /* 1461 * If the writing process hands us a hidden note-off in a note-on event, 1462 * we will simply write it that way; no need to special case it here, 1463 * as midi(4) will always canonicalize or compress as appropriate anyway. 1464 */ 1465 static int 1466 midiseq_noteon(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1467 { 1468 return midiseq_out(md, (uint8_t[]){ 1469 MIDI_NOTEON | chan, key, ev->c_NOTEON.velocity & 0x7f}, 3, 1); 1470 } 1471 1472 static int 1473 midiseq_noteoff(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1474 { 1475 return midiseq_out(md, (uint8_t[]){ 1476 MIDI_NOTEOFF | chan, key, ev->c_NOTEOFF.velocity & 0x7f}, 3, 1); 1477 } 1478 1479 static int 1480 midiseq_keypressure(struct midi_dev *md, int chan, int key, seq_event_t *ev) 1481 { 1482 return midiseq_out(md, (uint8_t[]){ 1483 MIDI_KEY_PRESSURE | chan, key, 1484 ev->c_KEY_PRESSURE.pressure & 0x7f}, 3, 1); 1485 } 1486 1487 static int 1488 midiseq_pgmchange(struct midi_dev *md, int chan, seq_event_t *ev) 1489 { 1490 if (ev->c_PGM_CHANGE.program > 127) 1491 return EINVAL; 1492 return midiseq_out(md, (uint8_t[]){ 1493 MIDI_PGM_CHANGE | chan, ev->c_PGM_CHANGE.program}, 2, 1); 1494 } 1495 1496 static int 1497 midiseq_chnpressure(struct midi_dev *md, int chan, seq_event_t *ev) 1498 { 1499 if (ev->c_CHN_PRESSURE.pressure > 127) 1500 return EINVAL; 1501 return midiseq_out(md, (uint8_t[]){ 1502 MIDI_CHN_PRESSURE | chan, ev->c_CHN_PRESSURE.pressure}, 2, 1); 1503 } 1504 1505 static int 1506 midiseq_ctlchange(struct midi_dev *md, int chan, seq_event_t *ev) 1507 { 1508 if (ev->c_CTL_CHANGE.controller > 127) 1509 return EINVAL; 1510 return midiseq_out( md, (uint8_t[]){ 1511 MIDI_CTL_CHANGE | chan, ev->c_CTL_CHANGE.controller, 1512 ev->c_CTL_CHANGE.value & 0x7f /* XXX this is SO wrong */ 1513 }, 3, 1); 1514 } 1515 1516 static int 1517 midiseq_pitchbend(struct midi_dev *md, int chan, seq_event_t *ev) 1518 { 1519 return midiseq_out(md, (uint8_t[]){ 1520 MIDI_PITCH_BEND | chan, 1521 ev->c_PITCH_BEND.value & 0x7f, 1522 (ev->c_PITCH_BEND.value >> 7) & 0x7f}, 3, 1); 1523 } 1524 1525 static int 1526 midiseq_loadpatch(struct midi_dev *md, 1527 struct sysex_info *sysex, struct uio *uio) 1528 { 1529 struct sequencer_softc *sc; 1530 u_char c, bf[128]; 1531 int i, cc, error; 1532 1533 if (sysex->key != SEQ_SYSEX_PATCH) { 1534 DPRINTFN(-1,("midiseq_loadpatch: bad patch key 0x%04x\n", 1535 sysex->key)); 1536 return (EINVAL); 1537 } 1538 if (uio->uio_resid < sysex->len) 1539 /* adjust length, should be an error */ 1540 sysex->len = uio->uio_resid; 1541 1542 DPRINTFN(2, ("midiseq_loadpatch: len=%d\n", sysex->len)); 1543 if (sysex->len == 0) 1544 return EINVAL; 1545 error = uiomove(&c, 1, uio); 1546 if (error) 1547 return error; 1548 if (c != MIDI_SYSEX_START) /* must start like this */ 1549 return EINVAL; 1550 sc = md->seq; 1551 mutex_enter(&sc->lock); 1552 error = midiseq_out(md, &c, 1, 0); 1553 mutex_exit(&sc->lock); 1554 if (error) 1555 return error; 1556 --sysex->len; 1557 while (sysex->len > 0) { 1558 cc = sysex->len; 1559 if (cc > sizeof bf) 1560 cc = sizeof bf; 1561 error = uiomove(bf, cc, uio); 1562 if (error) 1563 break; 1564 for(i = 0; i < cc && !MIDI_IS_STATUS(bf[i]); i++) 1565 ; 1566 /* 1567 * XXX midi(4)'s buffer might not accommodate this, and the 1568 * function will not block us (though in this case we have 1569 * a process and could in principle block). 1570 */ 1571 mutex_enter(&sc->lock); 1572 error = midiseq_out(md, bf, i, 0); 1573 mutex_exit(&sc->lock); 1574 if (error) 1575 break; 1576 sysex->len -= i; 1577 if (i != cc) 1578 break; 1579 } 1580 /* 1581 * Any leftover data in uio is rubbish; 1582 * the SYSEX should be one write ending in SYSEX_END. 1583 */ 1584 uio->uio_resid = 0; 1585 c = MIDI_SYSEX_END; 1586 mutex_enter(&sc->lock); 1587 error = midiseq_out(md, &c, 1, 0); 1588 mutex_exit(&sc->lock); 1589 return error; 1590 } 1591 1592 #include "midi.h" 1593 #if NMIDI == 0 1594 static dev_type_open(midiopen); 1595 static dev_type_close(midiclose); 1596 1597 const struct cdevsw midi_cdevsw = { 1598 .d_open = midiopen, 1599 .d_close = midiclose, 1600 .d_read = noread, 1601 .d_write = nowrite, 1602 .d_ioctl = noioctl, 1603 .d_stop = nostop, 1604 .d_tty = notty, 1605 .d_poll = nopoll, 1606 .d_mmap = nommap, 1607 .d_kqfilter = nokqfilter, 1608 .d_flag = D_OTHER | D_MPSAFE 1609 }; 1610 1611 /* 1612 * If someone has a sequencer, but no midi devices there will 1613 * be unresolved references, so we provide little stubs. 1614 */ 1615 1616 int 1617 midi_unit_count(void) 1618 { 1619 return (0); 1620 } 1621 1622 static int 1623 midiopen(dev_t dev, int flags, int ifmt, struct lwp *l) 1624 { 1625 return (ENXIO); 1626 } 1627 1628 struct cfdriver midi_cd; 1629 1630 void 1631 midi_getinfo(dev_t dev, struct midi_info *mi) 1632 { 1633 mi->name = "Dummy MIDI device"; 1634 mi->props = 0; 1635 } 1636 1637 static int 1638 midiclose(dev_t dev, int flags, int ifmt, struct lwp *l) 1639 { 1640 return (ENXIO); 1641 } 1642 1643 int 1644 midi_writebytes(int unit, u_char *bf, int cc) 1645 { 1646 return (ENXIO); 1647 } 1648 #endif /* NMIDI == 0 */ 1649