1 /*- 2 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org> 3 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006 4 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org> 5 * Copyright (c) 1997 Luigi Rizzo 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifdef HAVE_KERNEL_OPTION_HEADERS 31 #include "opt_snd.h" 32 #endif 33 34 #include <dev/sound/pcm/sound.h> 35 #include <dev/sound/pcm/ac97.h> 36 #include <dev/sound/pcm/vchan.h> 37 #include <dev/sound/pcm/dsp.h> 38 #include <dev/sound/pcm/sndstat.h> 39 #include <dev/sound/version.h> 40 #include <sys/limits.h> 41 #include <sys/sysctl.h> 42 43 #include "feeder_if.h" 44 45 SND_DECLARE_FILE("$FreeBSD$"); 46 47 devclass_t pcm_devclass; 48 49 int pcm_veto_load = 1; 50 51 int snd_unit = -1; 52 TUNABLE_INT("hw.snd.default_unit", &snd_unit); 53 54 static int snd_unit_auto = -1; 55 SYSCTL_INT(_hw_snd, OID_AUTO, default_auto, CTLFLAG_RWTUN, 56 &snd_unit_auto, 0, "assign default unit to a newly attached device"); 57 58 int snd_maxautovchans = 16; 59 /* XXX: a tunable implies that we may need more than one sound channel before 60 the system can change a sysctl (/etc/sysctl.conf), do we really need 61 this? */ 62 TUNABLE_INT("hw.snd.maxautovchans", &snd_maxautovchans); 63 64 SYSCTL_NODE(_hw, OID_AUTO, snd, CTLFLAG_RD, 0, "Sound driver"); 65 66 /* 67 * XXX I've had enough with people not telling proper version/arch 68 * while reporting problems, not after 387397913213th questions/requests. 69 */ 70 static char snd_driver_version[] = 71 __XSTRING(SND_DRV_VERSION)"/"MACHINE_ARCH; 72 SYSCTL_STRING(_hw_snd, OID_AUTO, version, CTLFLAG_RD, &snd_driver_version, 73 0, "driver version/arch"); 74 75 /** 76 * @brief Unit number allocator for syncgroup IDs 77 */ 78 struct unrhdr *pcmsg_unrhdr = NULL; 79 80 static int 81 sndstat_prepare_pcm(SNDSTAT_PREPARE_PCM_ARGS) 82 { 83 SNDSTAT_PREPARE_PCM_BEGIN(); 84 SNDSTAT_PREPARE_PCM_END(); 85 } 86 87 void * 88 snd_mtxcreate(const char *desc, const char *type) 89 { 90 struct mtx *m; 91 92 m = malloc(sizeof(*m), M_DEVBUF, M_WAITOK | M_ZERO); 93 mtx_init(m, desc, type, MTX_DEF); 94 return m; 95 } 96 97 void 98 snd_mtxfree(void *m) 99 { 100 struct mtx *mtx = m; 101 102 mtx_destroy(mtx); 103 free(mtx, M_DEVBUF); 104 } 105 106 void 107 snd_mtxassert(void *m) 108 { 109 #ifdef INVARIANTS 110 struct mtx *mtx = m; 111 112 mtx_assert(mtx, MA_OWNED); 113 #endif 114 } 115 116 int 117 snd_setup_intr(device_t dev, struct resource *res, int flags, driver_intr_t hand, void *param, void **cookiep) 118 { 119 struct snddev_info *d; 120 121 flags &= INTR_MPSAFE; 122 flags |= INTR_TYPE_AV; 123 d = device_get_softc(dev); 124 if (d != NULL && (flags & INTR_MPSAFE)) 125 d->flags |= SD_F_MPSAFE; 126 127 return bus_setup_intr(dev, res, flags, 128 #if __FreeBSD_version >= 700031 129 NULL, 130 #endif 131 hand, param, cookiep); 132 } 133 134 static void 135 pcm_clonereset(struct snddev_info *d) 136 { 137 int cmax; 138 139 PCM_BUSYASSERT(d); 140 141 cmax = d->playcount + d->reccount - 1; 142 if (d->pvchancount > 0) 143 cmax += max(d->pvchancount, snd_maxautovchans) - 1; 144 if (d->rvchancount > 0) 145 cmax += max(d->rvchancount, snd_maxautovchans) - 1; 146 if (cmax > PCMMAXCLONE) 147 cmax = PCMMAXCLONE; 148 (void)snd_clone_gc(d->clones); 149 (void)snd_clone_setmaxunit(d->clones, cmax); 150 } 151 152 int 153 pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num) 154 { 155 struct pcm_channel *c, *ch, *nch; 156 struct pcmchan_caps *caps; 157 int i, err, vcnt; 158 159 PCM_BUSYASSERT(d); 160 161 if ((direction == PCMDIR_PLAY && d->playcount < 1) || 162 (direction == PCMDIR_REC && d->reccount < 1)) 163 return (ENODEV); 164 165 if (!(d->flags & SD_F_AUTOVCHAN)) 166 return (EINVAL); 167 168 if (newcnt < 0 || newcnt > SND_MAXVCHANS) 169 return (E2BIG); 170 171 if (direction == PCMDIR_PLAY) 172 vcnt = d->pvchancount; 173 else if (direction == PCMDIR_REC) 174 vcnt = d->rvchancount; 175 else 176 return (EINVAL); 177 178 if (newcnt > vcnt) { 179 KASSERT(num == -1 || 180 (num >= 0 && num < SND_MAXVCHANS && (newcnt - 1) == vcnt), 181 ("bogus vchan_create() request num=%d newcnt=%d vcnt=%d", 182 num, newcnt, vcnt)); 183 /* add new vchans - find a parent channel first */ 184 ch = NULL; 185 CHN_FOREACH(c, d, channels.pcm) { 186 CHN_LOCK(c); 187 if (c->direction == direction && 188 ((c->flags & CHN_F_HAS_VCHAN) || (vcnt == 0 && 189 c->refcount < 1 && 190 !(c->flags & (CHN_F_BUSY | CHN_F_VIRTUAL))))) { 191 /* 192 * Reuse hw channel with vchans already 193 * created. 194 */ 195 if (c->flags & CHN_F_HAS_VCHAN) { 196 ch = c; 197 break; 198 } 199 /* 200 * No vchans ever created, look for 201 * channels with supported formats. 202 */ 203 caps = chn_getcaps(c); 204 if (caps == NULL) { 205 CHN_UNLOCK(c); 206 continue; 207 } 208 for (i = 0; caps->fmtlist[i] != 0; i++) { 209 if (caps->fmtlist[i] & AFMT_CONVERTIBLE) 210 break; 211 } 212 if (caps->fmtlist[i] != 0) { 213 ch = c; 214 break; 215 } 216 } 217 CHN_UNLOCK(c); 218 } 219 if (ch == NULL) 220 return (EBUSY); 221 ch->flags |= CHN_F_BUSY; 222 err = 0; 223 while (err == 0 && newcnt > vcnt) { 224 err = vchan_create(ch, num); 225 if (err == 0) 226 vcnt++; 227 else if (err == E2BIG && newcnt > vcnt) 228 device_printf(d->dev, 229 "%s: err=%d Maximum channel reached.\n", 230 __func__, err); 231 } 232 if (vcnt == 0) 233 ch->flags &= ~CHN_F_BUSY; 234 CHN_UNLOCK(ch); 235 if (err != 0) 236 return (err); 237 else 238 pcm_clonereset(d); 239 } else if (newcnt < vcnt) { 240 KASSERT(num == -1, 241 ("bogus vchan_destroy() request num=%d", num)); 242 CHN_FOREACH(c, d, channels.pcm) { 243 CHN_LOCK(c); 244 if (c->direction != direction || 245 CHN_EMPTY(c, children) || 246 !(c->flags & CHN_F_HAS_VCHAN)) { 247 CHN_UNLOCK(c); 248 continue; 249 } 250 CHN_FOREACH_SAFE(ch, c, nch, children) { 251 CHN_LOCK(ch); 252 if (vcnt == 1 && c->refcount > 0) { 253 CHN_UNLOCK(ch); 254 break; 255 } 256 if (!(ch->flags & CHN_F_BUSY) && 257 ch->refcount < 1) { 258 err = vchan_destroy(ch); 259 if (err == 0) 260 vcnt--; 261 } else 262 CHN_UNLOCK(ch); 263 if (vcnt == newcnt) 264 break; 265 } 266 CHN_UNLOCK(c); 267 break; 268 } 269 pcm_clonereset(d); 270 } 271 272 return (0); 273 } 274 275 /* return error status and a locked channel */ 276 int 277 pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction, 278 pid_t pid, char *comm, int devunit) 279 { 280 struct pcm_channel *c; 281 int err, vchancount, vchan_num; 282 283 KASSERT(d != NULL && ch != NULL && (devunit == -1 || 284 !(devunit & ~(SND_U_MASK | SND_D_MASK | SND_C_MASK))) && 285 (direction == PCMDIR_PLAY || direction == PCMDIR_REC), 286 ("%s(): invalid d=%p ch=%p direction=%d pid=%d devunit=%d", 287 __func__, d, ch, direction, pid, devunit)); 288 PCM_BUSYASSERT(d); 289 290 /* Double check again. */ 291 if (devunit != -1) { 292 switch (snd_unit2d(devunit)) { 293 case SND_DEV_DSPHW_PLAY: 294 case SND_DEV_DSPHW_VPLAY: 295 if (direction != PCMDIR_PLAY) 296 return (ENOTSUP); 297 break; 298 case SND_DEV_DSPHW_REC: 299 case SND_DEV_DSPHW_VREC: 300 if (direction != PCMDIR_REC) 301 return (ENOTSUP); 302 break; 303 default: 304 if (!(direction == PCMDIR_PLAY || 305 direction == PCMDIR_REC)) 306 return (ENOTSUP); 307 break; 308 } 309 } 310 311 *ch = NULL; 312 vchan_num = 0; 313 vchancount = (direction == PCMDIR_PLAY) ? d->pvchancount : 314 d->rvchancount; 315 316 retry_chnalloc: 317 err = ENOTSUP; 318 /* scan for a free channel */ 319 CHN_FOREACH(c, d, channels.pcm) { 320 CHN_LOCK(c); 321 if (devunit == -1 && c->direction == direction && 322 (c->flags & CHN_F_VIRTUAL)) { 323 if (vchancount < snd_maxautovchans && 324 vchan_num < CHN_CHAN(c)) { 325 CHN_UNLOCK(c); 326 goto vchan_alloc; 327 } 328 vchan_num++; 329 } 330 if (c->direction == direction && !(c->flags & CHN_F_BUSY) && 331 (devunit == -1 || devunit == -2 || c->unit == devunit)) { 332 c->flags |= CHN_F_BUSY; 333 c->pid = pid; 334 strlcpy(c->comm, (comm != NULL) ? comm : 335 CHN_COMM_UNKNOWN, sizeof(c->comm)); 336 *ch = c; 337 return (0); 338 } else if (c->unit == devunit) { 339 if (c->direction != direction) 340 err = ENOTSUP; 341 else if (c->flags & CHN_F_BUSY) 342 err = EBUSY; 343 else 344 err = EINVAL; 345 CHN_UNLOCK(c); 346 return (err); 347 } else if ((devunit == -1 || devunit == -2) && 348 c->direction == direction && (c->flags & CHN_F_BUSY)) 349 err = EBUSY; 350 CHN_UNLOCK(c); 351 } 352 353 if (devunit == -2) 354 return (err); 355 356 vchan_alloc: 357 /* no channel available */ 358 if (devunit == -1 || snd_unit2d(devunit) == SND_DEV_DSPHW_VPLAY || 359 snd_unit2d(devunit) == SND_DEV_DSPHW_VREC) { 360 if (!(vchancount > 0 && vchancount < snd_maxautovchans) && 361 (devunit == -1 || snd_unit2c(devunit) < snd_maxautovchans)) 362 return (err); 363 err = pcm_setvchans(d, direction, vchancount + 1, 364 (devunit == -1) ? -1 : snd_unit2c(devunit)); 365 if (err == 0) { 366 if (devunit == -1) 367 devunit = -2; 368 goto retry_chnalloc; 369 } 370 } 371 372 return (err); 373 } 374 375 /* release a locked channel and unlock it */ 376 int 377 pcm_chnrelease(struct pcm_channel *c) 378 { 379 PCM_BUSYASSERT(c->parentsnddev); 380 CHN_LOCKASSERT(c); 381 382 c->flags &= ~CHN_F_BUSY; 383 c->pid = -1; 384 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm)); 385 CHN_UNLOCK(c); 386 387 return (0); 388 } 389 390 int 391 pcm_chnref(struct pcm_channel *c, int ref) 392 { 393 PCM_BUSYASSERT(c->parentsnddev); 394 CHN_LOCKASSERT(c); 395 396 c->refcount += ref; 397 398 return (c->refcount); 399 } 400 401 int 402 pcm_inprog(struct snddev_info *d, int delta) 403 { 404 PCM_LOCKASSERT(d); 405 406 d->inprog += delta; 407 408 return (d->inprog); 409 } 410 411 static void 412 pcm_setmaxautovchans(struct snddev_info *d, int num) 413 { 414 PCM_BUSYASSERT(d); 415 416 if (num < 0) 417 return; 418 419 if (num >= 0 && d->pvchancount > num) 420 (void)pcm_setvchans(d, PCMDIR_PLAY, num, -1); 421 else if (num > 0 && d->pvchancount == 0) 422 (void)pcm_setvchans(d, PCMDIR_PLAY, 1, -1); 423 424 if (num >= 0 && d->rvchancount > num) 425 (void)pcm_setvchans(d, PCMDIR_REC, num, -1); 426 else if (num > 0 && d->rvchancount == 0) 427 (void)pcm_setvchans(d, PCMDIR_REC, 1, -1); 428 429 pcm_clonereset(d); 430 } 431 432 static int 433 sysctl_hw_snd_default_unit(SYSCTL_HANDLER_ARGS) 434 { 435 struct snddev_info *d; 436 int error, unit; 437 438 unit = snd_unit; 439 error = sysctl_handle_int(oidp, &unit, 0, req); 440 if (error == 0 && req->newptr != NULL) { 441 d = devclass_get_softc(pcm_devclass, unit); 442 if (!PCM_REGISTERED(d) || CHN_EMPTY(d, channels.pcm)) 443 return EINVAL; 444 snd_unit = unit; 445 snd_unit_auto = 0; 446 } 447 return (error); 448 } 449 /* XXX: do we need a way to let the user change the default unit? */ 450 SYSCTL_PROC(_hw_snd, OID_AUTO, default_unit, 451 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY, 452 0, sizeof(int), sysctl_hw_snd_default_unit, "I", 453 "default sound device"); 454 455 static int 456 sysctl_hw_snd_maxautovchans(SYSCTL_HANDLER_ARGS) 457 { 458 struct snddev_info *d; 459 int i, v, error; 460 461 v = snd_maxautovchans; 462 error = sysctl_handle_int(oidp, &v, 0, req); 463 if (error == 0 && req->newptr != NULL) { 464 if (v < 0) 465 v = 0; 466 if (v > SND_MAXVCHANS) 467 v = SND_MAXVCHANS; 468 snd_maxautovchans = v; 469 for (i = 0; pcm_devclass != NULL && 470 i < devclass_get_maxunit(pcm_devclass); i++) { 471 d = devclass_get_softc(pcm_devclass, i); 472 if (!PCM_REGISTERED(d)) 473 continue; 474 PCM_ACQUIRE_QUICK(d); 475 pcm_setmaxautovchans(d, v); 476 PCM_RELEASE_QUICK(d); 477 } 478 } 479 return (error); 480 } 481 SYSCTL_PROC(_hw_snd, OID_AUTO, maxautovchans, CTLTYPE_INT | CTLFLAG_RW, 482 0, sizeof(int), sysctl_hw_snd_maxautovchans, "I", "maximum virtual channel"); 483 484 struct pcm_channel * 485 pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, int num, void *devinfo) 486 { 487 struct pcm_channel *ch; 488 int direction, err, rpnum, *pnum, max; 489 int udc, device, chan; 490 char *dirs, *devname, buf[CHN_NAMELEN]; 491 492 PCM_BUSYASSERT(d); 493 PCM_LOCKASSERT(d); 494 KASSERT(num >= -1, ("invalid num=%d", num)); 495 496 497 switch (dir) { 498 case PCMDIR_PLAY: 499 dirs = "play"; 500 direction = PCMDIR_PLAY; 501 pnum = &d->playcount; 502 device = SND_DEV_DSPHW_PLAY; 503 max = SND_MAXHWCHAN; 504 break; 505 case PCMDIR_PLAY_VIRTUAL: 506 dirs = "virtual"; 507 direction = PCMDIR_PLAY; 508 pnum = &d->pvchancount; 509 device = SND_DEV_DSPHW_VPLAY; 510 max = SND_MAXVCHANS; 511 break; 512 case PCMDIR_REC: 513 dirs = "record"; 514 direction = PCMDIR_REC; 515 pnum = &d->reccount; 516 device = SND_DEV_DSPHW_REC; 517 max = SND_MAXHWCHAN; 518 break; 519 case PCMDIR_REC_VIRTUAL: 520 dirs = "virtual"; 521 direction = PCMDIR_REC; 522 pnum = &d->rvchancount; 523 device = SND_DEV_DSPHW_VREC; 524 max = SND_MAXVCHANS; 525 break; 526 default: 527 return (NULL); 528 } 529 530 chan = (num == -1) ? 0 : num; 531 532 if (*pnum >= max || chan >= max) 533 return (NULL); 534 535 rpnum = 0; 536 537 CHN_FOREACH(ch, d, channels.pcm) { 538 if (CHN_DEV(ch) != device) 539 continue; 540 if (chan == CHN_CHAN(ch)) { 541 if (num != -1) { 542 device_printf(d->dev, 543 "channel num=%d allocated!\n", chan); 544 return (NULL); 545 } 546 chan++; 547 if (chan >= max) { 548 device_printf(d->dev, 549 "chan=%d > %d\n", chan, max); 550 return (NULL); 551 } 552 } 553 rpnum++; 554 } 555 556 if (*pnum != rpnum) { 557 device_printf(d->dev, 558 "%s(): WARNING: pnum screwed : dirs=%s pnum=%d rpnum=%d\n", 559 __func__, dirs, *pnum, rpnum); 560 return (NULL); 561 } 562 563 udc = snd_mkunit(device_get_unit(d->dev), device, chan); 564 devname = dsp_unit2name(buf, sizeof(buf), udc); 565 566 if (devname == NULL) { 567 device_printf(d->dev, 568 "Failed to query device name udc=0x%08x\n", udc); 569 return (NULL); 570 } 571 572 PCM_UNLOCK(d); 573 ch = malloc(sizeof(*ch), M_DEVBUF, M_WAITOK | M_ZERO); 574 ch->methods = kobj_create(cls, M_DEVBUF, M_WAITOK | M_ZERO); 575 ch->unit = udc; 576 ch->pid = -1; 577 strlcpy(ch->comm, CHN_COMM_UNUSED, sizeof(ch->comm)); 578 ch->parentsnddev = d; 579 ch->parentchannel = parent; 580 ch->dev = d->dev; 581 ch->trigger = PCMTRIG_STOP; 582 snprintf(ch->name, sizeof(ch->name), "%s:%s:%s", 583 device_get_nameunit(ch->dev), dirs, devname); 584 585 err = chn_init(ch, devinfo, dir, direction); 586 PCM_LOCK(d); 587 if (err) { 588 device_printf(d->dev, "chn_init(%s) failed: err = %d\n", 589 ch->name, err); 590 kobj_delete(ch->methods, M_DEVBUF); 591 free(ch, M_DEVBUF); 592 return (NULL); 593 } 594 595 return (ch); 596 } 597 598 int 599 pcm_chn_destroy(struct pcm_channel *ch) 600 { 601 struct snddev_info *d; 602 int err; 603 604 d = ch->parentsnddev; 605 PCM_BUSYASSERT(d); 606 607 err = chn_kill(ch); 608 if (err) { 609 device_printf(ch->dev, "chn_kill(%s) failed, err = %d\n", 610 ch->name, err); 611 return (err); 612 } 613 614 kobj_delete(ch->methods, M_DEVBUF); 615 free(ch, M_DEVBUF); 616 617 return (0); 618 } 619 620 int 621 pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch) 622 { 623 PCM_BUSYASSERT(d); 624 PCM_LOCKASSERT(d); 625 KASSERT(ch != NULL && (ch->direction == PCMDIR_PLAY || 626 ch->direction == PCMDIR_REC), ("Invalid pcm channel")); 627 628 CHN_INSERT_SORT_ASCEND(d, ch, channels.pcm); 629 630 switch (CHN_DEV(ch)) { 631 case SND_DEV_DSPHW_PLAY: 632 d->playcount++; 633 break; 634 case SND_DEV_DSPHW_VPLAY: 635 d->pvchancount++; 636 break; 637 case SND_DEV_DSPHW_REC: 638 d->reccount++; 639 break; 640 case SND_DEV_DSPHW_VREC: 641 d->rvchancount++; 642 break; 643 default: 644 break; 645 } 646 647 d->devcount++; 648 649 return (0); 650 } 651 652 int 653 pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch) 654 { 655 struct pcm_channel *tmp; 656 657 PCM_BUSYASSERT(d); 658 PCM_LOCKASSERT(d); 659 660 tmp = NULL; 661 662 CHN_FOREACH(tmp, d, channels.pcm) { 663 if (tmp == ch) 664 break; 665 } 666 667 if (tmp != ch) 668 return (EINVAL); 669 670 CHN_REMOVE(d, ch, channels.pcm); 671 672 switch (CHN_DEV(ch)) { 673 case SND_DEV_DSPHW_PLAY: 674 d->playcount--; 675 break; 676 case SND_DEV_DSPHW_VPLAY: 677 d->pvchancount--; 678 break; 679 case SND_DEV_DSPHW_REC: 680 d->reccount--; 681 break; 682 case SND_DEV_DSPHW_VREC: 683 d->rvchancount--; 684 break; 685 default: 686 break; 687 } 688 689 d->devcount--; 690 691 return (0); 692 } 693 694 int 695 pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo) 696 { 697 struct snddev_info *d = device_get_softc(dev); 698 struct pcm_channel *ch; 699 int err; 700 701 PCM_BUSYASSERT(d); 702 703 PCM_LOCK(d); 704 ch = pcm_chn_create(d, NULL, cls, dir, -1, devinfo); 705 if (!ch) { 706 device_printf(d->dev, "pcm_chn_create(%s, %d, %p) failed\n", 707 cls->name, dir, devinfo); 708 PCM_UNLOCK(d); 709 return (ENODEV); 710 } 711 712 err = pcm_chn_add(d, ch); 713 PCM_UNLOCK(d); 714 if (err) { 715 device_printf(d->dev, "pcm_chn_add(%s) failed, err=%d\n", 716 ch->name, err); 717 pcm_chn_destroy(ch); 718 } 719 720 return (err); 721 } 722 723 static int 724 pcm_killchan(device_t dev) 725 { 726 struct snddev_info *d = device_get_softc(dev); 727 struct pcm_channel *ch; 728 int error; 729 730 PCM_BUSYASSERT(d); 731 732 ch = CHN_FIRST(d, channels.pcm); 733 734 PCM_LOCK(d); 735 error = pcm_chn_remove(d, ch); 736 PCM_UNLOCK(d); 737 if (error) 738 return (error); 739 return (pcm_chn_destroy(ch)); 740 } 741 742 static int 743 pcm_best_unit(int old) 744 { 745 struct snddev_info *d; 746 int i, best, bestprio, prio; 747 748 best = -1; 749 bestprio = -100; 750 for (i = 0; pcm_devclass != NULL && 751 i < devclass_get_maxunit(pcm_devclass); i++) { 752 d = devclass_get_softc(pcm_devclass, i); 753 if (!PCM_REGISTERED(d)) 754 continue; 755 prio = 0; 756 if (d->playcount == 0) 757 prio -= 10; 758 if (d->reccount == 0) 759 prio -= 2; 760 if (prio > bestprio || (prio == bestprio && i == old)) { 761 best = i; 762 bestprio = prio; 763 } 764 } 765 return (best); 766 } 767 768 int 769 pcm_setstatus(device_t dev, char *str) 770 { 771 struct snddev_info *d = device_get_softc(dev); 772 773 PCM_BUSYASSERT(d); 774 775 if (d->playcount == 0 || d->reccount == 0) 776 d->flags |= SD_F_SIMPLEX; 777 778 if ((d->playcount > 0 || d->reccount > 0) && 779 !(d->flags & SD_F_AUTOVCHAN)) { 780 d->flags |= SD_F_AUTOVCHAN; 781 vchan_initsys(dev); 782 } 783 784 pcm_setmaxautovchans(d, snd_maxautovchans); 785 786 strlcpy(d->status, str, SND_STATUSLEN); 787 788 PCM_LOCK(d); 789 790 /* Last stage, enable cloning. */ 791 if (d->clones != NULL) 792 (void)snd_clone_enable(d->clones); 793 794 /* Done, we're ready.. */ 795 d->flags |= SD_F_REGISTERED; 796 797 PCM_RELEASE(d); 798 799 PCM_UNLOCK(d); 800 801 if (snd_unit_auto < 0) 802 snd_unit_auto = (snd_unit < 0) ? 1 : 0; 803 if (snd_unit < 0 || snd_unit_auto > 1) 804 snd_unit = device_get_unit(dev); 805 else if (snd_unit_auto == 1) 806 snd_unit = pcm_best_unit(snd_unit); 807 808 return (0); 809 } 810 811 uint32_t 812 pcm_getflags(device_t dev) 813 { 814 struct snddev_info *d = device_get_softc(dev); 815 816 return d->flags; 817 } 818 819 void 820 pcm_setflags(device_t dev, uint32_t val) 821 { 822 struct snddev_info *d = device_get_softc(dev); 823 824 d->flags = val; 825 } 826 827 void * 828 pcm_getdevinfo(device_t dev) 829 { 830 struct snddev_info *d = device_get_softc(dev); 831 832 return d->devinfo; 833 } 834 835 unsigned int 836 pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz) 837 { 838 struct snddev_info *d = device_get_softc(dev); 839 int sz, x; 840 841 sz = 0; 842 if (resource_int_value(device_get_name(dev), device_get_unit(dev), "buffersize", &sz) == 0) { 843 x = sz; 844 RANGE(sz, minbufsz, maxbufsz); 845 if (x != sz) 846 device_printf(dev, "'buffersize=%d' hint is out of range (%d-%d), using %d\n", x, minbufsz, maxbufsz, sz); 847 x = minbufsz; 848 while (x < sz) 849 x <<= 1; 850 if (x > sz) 851 x >>= 1; 852 if (x != sz) { 853 device_printf(dev, "'buffersize=%d' hint is not a power of 2, using %d\n", sz, x); 854 sz = x; 855 } 856 } else { 857 sz = deflt; 858 } 859 860 d->bufsz = sz; 861 862 return sz; 863 } 864 865 static int 866 sysctl_dev_pcm_bitperfect(SYSCTL_HANDLER_ARGS) 867 { 868 struct snddev_info *d; 869 int err, val; 870 871 d = oidp->oid_arg1; 872 if (!PCM_REGISTERED(d)) 873 return (ENODEV); 874 875 PCM_LOCK(d); 876 PCM_WAIT(d); 877 val = (d->flags & SD_F_BITPERFECT) ? 1 : 0; 878 PCM_ACQUIRE(d); 879 PCM_UNLOCK(d); 880 881 err = sysctl_handle_int(oidp, &val, 0, req); 882 883 if (err == 0 && req->newptr != NULL) { 884 if (!(val == 0 || val == 1)) { 885 PCM_RELEASE_QUICK(d); 886 return (EINVAL); 887 } 888 889 PCM_LOCK(d); 890 891 d->flags &= ~SD_F_BITPERFECT; 892 d->flags |= (val != 0) ? SD_F_BITPERFECT : 0; 893 894 PCM_RELEASE(d); 895 PCM_UNLOCK(d); 896 } else 897 PCM_RELEASE_QUICK(d); 898 899 return (err); 900 } 901 902 #ifdef SND_DEBUG 903 static int 904 sysctl_dev_pcm_clone_flags(SYSCTL_HANDLER_ARGS) 905 { 906 struct snddev_info *d; 907 uint32_t flags; 908 int err; 909 910 d = oidp->oid_arg1; 911 if (!PCM_REGISTERED(d) || d->clones == NULL) 912 return (ENODEV); 913 914 PCM_ACQUIRE_QUICK(d); 915 916 flags = snd_clone_getflags(d->clones); 917 err = sysctl_handle_int(oidp, &flags, 0, req); 918 919 if (err == 0 && req->newptr != NULL) { 920 if (flags & ~SND_CLONE_MASK) 921 err = EINVAL; 922 else 923 (void)snd_clone_setflags(d->clones, flags); 924 } 925 926 PCM_RELEASE_QUICK(d); 927 928 return (err); 929 } 930 931 static int 932 sysctl_dev_pcm_clone_deadline(SYSCTL_HANDLER_ARGS) 933 { 934 struct snddev_info *d; 935 int err, deadline; 936 937 d = oidp->oid_arg1; 938 if (!PCM_REGISTERED(d) || d->clones == NULL) 939 return (ENODEV); 940 941 PCM_ACQUIRE_QUICK(d); 942 943 deadline = snd_clone_getdeadline(d->clones); 944 err = sysctl_handle_int(oidp, &deadline, 0, req); 945 946 if (err == 0 && req->newptr != NULL) { 947 if (deadline < 0) 948 err = EINVAL; 949 else 950 (void)snd_clone_setdeadline(d->clones, deadline); 951 } 952 953 PCM_RELEASE_QUICK(d); 954 955 return (err); 956 } 957 958 static int 959 sysctl_dev_pcm_clone_gc(SYSCTL_HANDLER_ARGS) 960 { 961 struct snddev_info *d; 962 int err, val; 963 964 d = oidp->oid_arg1; 965 if (!PCM_REGISTERED(d) || d->clones == NULL) 966 return (ENODEV); 967 968 val = 0; 969 err = sysctl_handle_int(oidp, &val, 0, req); 970 971 if (err == 0 && req->newptr != NULL && val != 0) { 972 PCM_ACQUIRE_QUICK(d); 973 val = snd_clone_gc(d->clones); 974 PCM_RELEASE_QUICK(d); 975 if (bootverbose != 0 || snd_verbose > 3) 976 device_printf(d->dev, "clone gc: pruned=%d\n", val); 977 } 978 979 return (err); 980 } 981 982 static int 983 sysctl_hw_snd_clone_gc(SYSCTL_HANDLER_ARGS) 984 { 985 struct snddev_info *d; 986 int i, err, val; 987 988 val = 0; 989 err = sysctl_handle_int(oidp, &val, 0, req); 990 991 if (err == 0 && req->newptr != NULL && val != 0) { 992 for (i = 0; pcm_devclass != NULL && 993 i < devclass_get_maxunit(pcm_devclass); i++) { 994 d = devclass_get_softc(pcm_devclass, i); 995 if (!PCM_REGISTERED(d) || d->clones == NULL) 996 continue; 997 PCM_ACQUIRE_QUICK(d); 998 val = snd_clone_gc(d->clones); 999 PCM_RELEASE_QUICK(d); 1000 if (bootverbose != 0 || snd_verbose > 3) 1001 device_printf(d->dev, "clone gc: pruned=%d\n", 1002 val); 1003 } 1004 } 1005 1006 return (err); 1007 } 1008 SYSCTL_PROC(_hw_snd, OID_AUTO, clone_gc, CTLTYPE_INT | CTLFLAG_RW, 1009 0, sizeof(int), sysctl_hw_snd_clone_gc, "I", 1010 "global clone garbage collector"); 1011 #endif 1012 1013 int 1014 pcm_register(device_t dev, void *devinfo, int numplay, int numrec) 1015 { 1016 struct snddev_info *d; 1017 int i; 1018 1019 if (pcm_veto_load) { 1020 device_printf(dev, "disabled due to an error while initialising: %d\n", pcm_veto_load); 1021 1022 return EINVAL; 1023 } 1024 1025 if (device_get_unit(dev) > PCMMAXUNIT) { 1026 device_printf(dev, "PCMMAXUNIT reached : unit=%d > %d\n", 1027 device_get_unit(dev), PCMMAXUNIT); 1028 device_printf(dev, 1029 "Use 'hw.snd.maxunit' tunable to raise the limit.\n"); 1030 return ENODEV; 1031 } 1032 1033 d = device_get_softc(dev); 1034 d->dev = dev; 1035 d->lock = snd_mtxcreate(device_get_nameunit(dev), "sound cdev"); 1036 cv_init(&d->cv, device_get_nameunit(dev)); 1037 PCM_ACQUIRE_QUICK(d); 1038 dsp_cdevinfo_init(d); 1039 #if 0 1040 /* 1041 * d->flags should be cleared by the allocator of the softc. 1042 * We cannot clear this field here because several devices set 1043 * this flag before calling pcm_register(). 1044 */ 1045 d->flags = 0; 1046 #endif 1047 i = 0; 1048 if (resource_int_value(device_get_name(dev), device_get_unit(dev), 1049 "vpc", &i) != 0 || i != 0) 1050 d->flags |= SD_F_VPC; 1051 1052 if (resource_int_value(device_get_name(dev), device_get_unit(dev), 1053 "bitperfect", &i) == 0 && i != 0) 1054 d->flags |= SD_F_BITPERFECT; 1055 1056 d->devinfo = devinfo; 1057 d->devcount = 0; 1058 d->reccount = 0; 1059 d->playcount = 0; 1060 d->pvchancount = 0; 1061 d->rvchancount = 0; 1062 d->pvchanrate = 0; 1063 d->pvchanformat = 0; 1064 d->rvchanrate = 0; 1065 d->rvchanformat = 0; 1066 d->inprog = 0; 1067 1068 /* 1069 * Create clone manager, disabled by default. Cloning will be 1070 * enabled during final stage of driver initialization through 1071 * pcm_setstatus(). 1072 */ 1073 d->clones = snd_clone_create(SND_U_MASK | SND_D_MASK, PCMMAXCLONE, 1074 SND_CLONE_DEADLINE_DEFAULT, SND_CLONE_WAITOK | 1075 SND_CLONE_GC_ENABLE | SND_CLONE_GC_UNREF | 1076 SND_CLONE_GC_LASTREF | SND_CLONE_GC_EXPIRED); 1077 1078 CHN_INIT(d, channels.pcm); 1079 CHN_INIT(d, channels.pcm.busy); 1080 CHN_INIT(d, channels.pcm.opened); 1081 1082 /* XXX This is incorrect, but lets play along for now. */ 1083 if ((numplay == 0 || numrec == 0) && numplay != numrec) 1084 d->flags |= SD_F_SIMPLEX; 1085 1086 sysctl_ctx_init(&d->play_sysctl_ctx); 1087 d->play_sysctl_tree = SYSCTL_ADD_NODE(&d->play_sysctl_ctx, 1088 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "play", 1089 CTLFLAG_RD, 0, "playback channels node"); 1090 sysctl_ctx_init(&d->rec_sysctl_ctx); 1091 d->rec_sysctl_tree = SYSCTL_ADD_NODE(&d->rec_sysctl_ctx, 1092 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "rec", 1093 CTLFLAG_RD, 0, "record channels node"); 1094 /* XXX: an user should be able to set this with a control tool, the 1095 sysadmin then needs min+max sysctls for this */ 1096 SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev), 1097 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 1098 OID_AUTO, "buffersize", CTLFLAG_RD, &d->bufsz, 0, "allocated buffer size"); 1099 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1100 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1101 "bitperfect", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d), 1102 sysctl_dev_pcm_bitperfect, "I", 1103 "bit-perfect playback/recording (0=disable, 1=enable)"); 1104 #ifdef SND_DEBUG 1105 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1106 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1107 "clone_flags", CTLTYPE_UINT | CTLFLAG_RW, d, sizeof(d), 1108 sysctl_dev_pcm_clone_flags, "IU", 1109 "clone flags"); 1110 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1111 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1112 "clone_deadline", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d), 1113 sysctl_dev_pcm_clone_deadline, "I", 1114 "clone expiration deadline (ms)"); 1115 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), 1116 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 1117 "clone_gc", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d), 1118 sysctl_dev_pcm_clone_gc, "I", 1119 "clone garbage collector"); 1120 #endif 1121 1122 if (numplay > 0 || numrec > 0) { 1123 d->flags |= SD_F_AUTOVCHAN; 1124 vchan_initsys(dev); 1125 } 1126 1127 if (d->flags & SD_F_EQ) 1128 feeder_eq_initsys(dev); 1129 1130 sndstat_register(dev, d->status, sndstat_prepare_pcm); 1131 1132 return 0; 1133 } 1134 1135 int 1136 pcm_unregister(device_t dev) 1137 { 1138 struct snddev_info *d; 1139 struct pcm_channel *ch; 1140 struct thread *td; 1141 1142 td = curthread; 1143 d = device_get_softc(dev); 1144 1145 if (!PCM_ALIVE(d)) { 1146 device_printf(dev, "unregister: device not configured\n"); 1147 return (0); 1148 } 1149 1150 if (sndstat_acquire(td) != 0) { 1151 device_printf(dev, "unregister: sndstat busy\n"); 1152 return (EBUSY); 1153 } 1154 1155 PCM_LOCK(d); 1156 PCM_WAIT(d); 1157 1158 if (d->inprog != 0) { 1159 device_printf(dev, "unregister: operation in progress\n"); 1160 PCM_UNLOCK(d); 1161 sndstat_release(td); 1162 return (EBUSY); 1163 } 1164 1165 PCM_ACQUIRE(d); 1166 PCM_UNLOCK(d); 1167 1168 CHN_FOREACH(ch, d, channels.pcm) { 1169 CHN_LOCK(ch); 1170 if (ch->refcount > 0) { 1171 device_printf(dev, 1172 "unregister: channel %s busy (pid %d)\n", 1173 ch->name, ch->pid); 1174 CHN_UNLOCK(ch); 1175 PCM_RELEASE_QUICK(d); 1176 sndstat_release(td); 1177 return (EBUSY); 1178 } 1179 CHN_UNLOCK(ch); 1180 } 1181 1182 if (d->clones != NULL) { 1183 if (snd_clone_busy(d->clones) != 0) { 1184 device_printf(dev, "unregister: clone busy\n"); 1185 PCM_RELEASE_QUICK(d); 1186 sndstat_release(td); 1187 return (EBUSY); 1188 } else { 1189 PCM_LOCK(d); 1190 (void)snd_clone_disable(d->clones); 1191 PCM_UNLOCK(d); 1192 } 1193 } 1194 1195 if (mixer_uninit(dev) == EBUSY) { 1196 device_printf(dev, "unregister: mixer busy\n"); 1197 PCM_LOCK(d); 1198 if (d->clones != NULL) 1199 (void)snd_clone_enable(d->clones); 1200 PCM_RELEASE(d); 1201 PCM_UNLOCK(d); 1202 sndstat_release(td); 1203 return (EBUSY); 1204 } 1205 1206 PCM_LOCK(d); 1207 d->flags |= SD_F_DYING; 1208 d->flags &= ~SD_F_REGISTERED; 1209 PCM_UNLOCK(d); 1210 1211 /* 1212 * No lock being held, so this thing can be flushed without 1213 * stucking into devdrn oblivion. 1214 */ 1215 if (d->clones != NULL) { 1216 snd_clone_destroy(d->clones); 1217 d->clones = NULL; 1218 } 1219 1220 if (d->play_sysctl_tree != NULL) { 1221 sysctl_ctx_free(&d->play_sysctl_ctx); 1222 d->play_sysctl_tree = NULL; 1223 } 1224 if (d->rec_sysctl_tree != NULL) { 1225 sysctl_ctx_free(&d->rec_sysctl_ctx); 1226 d->rec_sysctl_tree = NULL; 1227 } 1228 1229 while (!CHN_EMPTY(d, channels.pcm)) 1230 pcm_killchan(dev); 1231 1232 dsp_cdevinfo_flush(d); 1233 1234 PCM_LOCK(d); 1235 PCM_RELEASE(d); 1236 cv_destroy(&d->cv); 1237 PCM_UNLOCK(d); 1238 snd_mtxfree(d->lock); 1239 sndstat_unregister(dev); 1240 sndstat_release(td); 1241 1242 if (snd_unit == device_get_unit(dev)) { 1243 snd_unit = pcm_best_unit(-1); 1244 if (snd_unit_auto == 0) 1245 snd_unit_auto = 1; 1246 } 1247 1248 return (0); 1249 } 1250 1251 /************************************************************************/ 1252 1253 /** 1254 * @brief Handle OSSv4 SNDCTL_SYSINFO ioctl. 1255 * 1256 * @param si Pointer to oss_sysinfo struct where information about the 1257 * sound subsystem will be written/copied. 1258 * 1259 * This routine returns information about the sound system, such as the 1260 * current OSS version, number of audio, MIDI, and mixer drivers, etc. 1261 * Also includes a bitmask showing which of the above types of devices 1262 * are open (busy). 1263 * 1264 * @note 1265 * Calling threads must not hold any snddev_info or pcm_channel locks. 1266 * 1267 * @author Ryan Beasley <ryanb@FreeBSD.org> 1268 */ 1269 void 1270 sound_oss_sysinfo(oss_sysinfo *si) 1271 { 1272 static char si_product[] = "FreeBSD native OSS ABI"; 1273 static char si_version[] = __XSTRING(__FreeBSD_version); 1274 static char si_license[] = "BSD"; 1275 static int intnbits = sizeof(int) * 8; /* Better suited as macro? 1276 Must pester a C guru. */ 1277 1278 struct snddev_info *d; 1279 struct pcm_channel *c; 1280 int i, j, ncards; 1281 1282 ncards = 0; 1283 1284 strlcpy(si->product, si_product, sizeof(si->product)); 1285 strlcpy(si->version, si_version, sizeof(si->version)); 1286 si->versionnum = SOUND_VERSION; 1287 strlcpy(si->license, si_license, sizeof(si->license)); 1288 1289 /* 1290 * Iterate over PCM devices and their channels, gathering up data 1291 * for the numaudios, ncards, and openedaudio fields. 1292 */ 1293 si->numaudios = 0; 1294 bzero((void *)&si->openedaudio, sizeof(si->openedaudio)); 1295 1296 j = 0; 1297 1298 for (i = 0; pcm_devclass != NULL && 1299 i < devclass_get_maxunit(pcm_devclass); i++) { 1300 d = devclass_get_softc(pcm_devclass, i); 1301 if (!PCM_REGISTERED(d)) 1302 continue; 1303 1304 /* XXX Need Giant magic entry ??? */ 1305 1306 /* See note in function's docblock */ 1307 PCM_UNLOCKASSERT(d); 1308 PCM_LOCK(d); 1309 1310 si->numaudios += d->devcount; 1311 ++ncards; 1312 1313 CHN_FOREACH(c, d, channels.pcm) { 1314 CHN_UNLOCKASSERT(c); 1315 CHN_LOCK(c); 1316 if (c->flags & CHN_F_BUSY) 1317 si->openedaudio[j / intnbits] |= 1318 (1 << (j % intnbits)); 1319 CHN_UNLOCK(c); 1320 j++; 1321 } 1322 1323 PCM_UNLOCK(d); 1324 } 1325 si->numaudioengines = si->numaudios; 1326 1327 si->numsynths = 0; /* OSSv4 docs: this field is obsolete */ 1328 /** 1329 * @todo Collect num{midis,timers}. 1330 * 1331 * Need access to sound/midi/midi.c::midistat_lock in order 1332 * to safely touch midi_devices and get a head count of, well, 1333 * MIDI devices. midistat_lock is a global static (i.e., local to 1334 * midi.c), but midi_devices is a regular global; should the mutex 1335 * be publicized, or is there another way to get this information? 1336 * 1337 * NB: MIDI/sequencer stuff is currently on hold. 1338 */ 1339 si->nummidis = 0; 1340 si->numtimers = 0; 1341 si->nummixers = mixer_count; 1342 si->numcards = ncards; 1343 /* OSSv4 docs: Intended only for test apps; API doesn't 1344 really have much of a concept of cards. Shouldn't be 1345 used by applications. */ 1346 1347 /** 1348 * @todo Fill in "busy devices" fields. 1349 * 1350 * si->openedmidi = " MIDI devices 1351 */ 1352 bzero((void *)&si->openedmidi, sizeof(si->openedmidi)); 1353 1354 /* 1355 * Si->filler is a reserved array, but according to docs each 1356 * element should be set to -1. 1357 */ 1358 for (i = 0; i < sizeof(si->filler)/sizeof(si->filler[0]); i++) 1359 si->filler[i] = -1; 1360 } 1361 1362 int 1363 sound_oss_card_info(oss_card_info *si) 1364 { 1365 struct snddev_info *d; 1366 int i, ncards; 1367 1368 ncards = 0; 1369 1370 for (i = 0; pcm_devclass != NULL && 1371 i < devclass_get_maxunit(pcm_devclass); i++) { 1372 d = devclass_get_softc(pcm_devclass, i); 1373 if (!PCM_REGISTERED(d)) 1374 continue; 1375 1376 if (ncards++ != si->card) 1377 continue; 1378 1379 PCM_UNLOCKASSERT(d); 1380 PCM_LOCK(d); 1381 1382 strlcpy(si->shortname, device_get_nameunit(d->dev), 1383 sizeof(si->shortname)); 1384 strlcpy(si->longname, device_get_desc(d->dev), 1385 sizeof(si->longname)); 1386 strlcpy(si->hw_info, d->status, sizeof(si->hw_info)); 1387 si->intr_count = si->ack_count = 0; 1388 1389 PCM_UNLOCK(d); 1390 1391 return (0); 1392 } 1393 return (ENXIO); 1394 } 1395 1396 /************************************************************************/ 1397 1398 static int 1399 sound_modevent(module_t mod, int type, void *data) 1400 { 1401 int ret; 1402 #if 0 1403 return (midi_modevent(mod, type, data)); 1404 #else 1405 ret = 0; 1406 1407 switch(type) { 1408 case MOD_LOAD: 1409 pcmsg_unrhdr = new_unrhdr(1, INT_MAX, NULL); 1410 break; 1411 case MOD_UNLOAD: 1412 ret = sndstat_acquire(curthread); 1413 if (ret != 0) 1414 break; 1415 if (pcmsg_unrhdr != NULL) { 1416 delete_unrhdr(pcmsg_unrhdr); 1417 pcmsg_unrhdr = NULL; 1418 } 1419 break; 1420 case MOD_SHUTDOWN: 1421 break; 1422 default: 1423 ret = ENOTSUP; 1424 } 1425 1426 return ret; 1427 #endif 1428 } 1429 1430 DEV_MODULE(sound, sound_modevent, NULL); 1431 MODULE_VERSION(sound, SOUND_MODVER); 1432