Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/dsp.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /* 2 * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/param.h> 28 #include <sys/queue.h> 29 30 #include <dev/sound/pcm/sound.h> 31 32 SND_DECLARE_FILE("$FreeBSD$"); 33 34 #define OLDPCM_IOCTL 35 36 static d_open_t dsp_open; 37 static d_close_t dsp_close; 38 static d_read_t dsp_read; 39 static d_write_t dsp_write; 40 static d_ioctl_t dsp_ioctl; 41 static d_poll_t dsp_poll; 42 static d_mmap_t dsp_mmap; 43 44 static struct cdevsw dsp_cdevsw = { 45 /* open */ dsp_open, 46 /* close */ dsp_close, 47 /* read */ dsp_read, 48 /* write */ dsp_write, 49 /* ioctl */ dsp_ioctl, 50 /* poll */ dsp_poll, 51 /* mmap */ dsp_mmap, 52 /* strategy */ nostrategy, 53 /* name */ "dsp", 54 /* maj */ SND_CDEV_MAJOR, 55 /* dump */ nodump, 56 /* psize */ nopsize, 57 /* flags */ 0, 58 }; 59 60 #ifdef USING_DEVFS 61 static eventhandler_tag dsp_ehtag; 62 #endif 63 64 static struct snddev_info * 65 dsp_get_info(dev_t dev) 66 { 67 struct snddev_info *d; 68 int unit; 69 70 unit = PCMUNIT(dev); 71 if (unit >= devclass_get_maxunit(pcm_devclass)) 72 return NULL; 73 d = devclass_get_softc(pcm_devclass, unit); 74 75 return d; 76 } 77 78 static u_int32_t 79 dsp_get_flags(dev_t dev) 80 { 81 device_t bdev; 82 int unit; 83 84 unit = PCMUNIT(dev); 85 if (unit >= devclass_get_maxunit(pcm_devclass)) 86 return 0xffffffff; 87 bdev = devclass_get_device(pcm_devclass, unit); 88 89 return pcm_getflags(bdev); 90 } 91 92 static void 93 dsp_set_flags(dev_t dev, u_int32_t flags) 94 { 95 device_t bdev; 96 int unit; 97 98 unit = PCMUNIT(dev); 99 if (unit >= devclass_get_maxunit(pcm_devclass)) 100 return; 101 bdev = devclass_get_device(pcm_devclass, unit); 102 103 pcm_setflags(bdev, flags); 104 } 105 106 /* 107 * return the channels channels associated with an open device instance. 108 * set the priority if the device is simplex and one direction (only) is 109 * specified. 110 * lock channels specified. 111 */ 112 static int 113 getchns(dev_t dev, struct pcm_channel **rdch, struct pcm_channel **wrch, u_int32_t prio) 114 { 115 struct snddev_info *d; 116 u_int32_t flags; 117 118 flags = dsp_get_flags(dev); 119 d = dsp_get_info(dev); 120 pcm_lock(d); 121 pcm_inprog(d, 1); 122 KASSERT((flags & SD_F_PRIO_SET) != SD_F_PRIO_SET, \ 123 ("getchns: read and write both prioritised")); 124 125 if ((flags & SD_F_PRIO_SET) == 0 && (prio != (SD_F_PRIO_RD | SD_F_PRIO_WR))) { 126 flags |= prio & (SD_F_PRIO_RD | SD_F_PRIO_WR); 127 dsp_set_flags(dev, flags); 128 } 129 130 *rdch = dev->si_drv1; 131 *wrch = dev->si_drv2; 132 if ((flags & SD_F_SIMPLEX) && (flags & SD_F_PRIO_SET)) { 133 if (prio) { 134 if (*rdch && flags & SD_F_PRIO_WR) { 135 dev->si_drv1 = NULL; 136 *rdch = pcm_getfakechan(d); 137 } else if (*wrch && flags & SD_F_PRIO_RD) { 138 dev->si_drv2 = NULL; 139 *wrch = pcm_getfakechan(d); 140 } 141 } 142 143 pcm_getfakechan(d)->flags |= CHN_F_BUSY; 144 } 145 pcm_unlock(d); 146 147 if (*rdch && *rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD)) 148 CHN_LOCK(*rdch); 149 if (*wrch && *wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR)) 150 CHN_LOCK(*wrch); 151 152 return 0; 153 } 154 155 /* unlock specified channels */ 156 static void 157 relchns(dev_t dev, struct pcm_channel *rdch, struct pcm_channel *wrch, u_int32_t prio) 158 { 159 struct snddev_info *d; 160 161 d = dsp_get_info(dev); 162 if (wrch && wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR)) 163 CHN_UNLOCK(wrch); 164 if (rdch && rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD)) 165 CHN_UNLOCK(rdch); 166 pcm_lock(d); 167 pcm_inprog(d, -1); 168 pcm_unlock(d); 169 } 170 171 static int 172 dsp_open(dev_t i_dev, int flags, int mode, struct proc *p) 173 { 174 struct pcm_channel *rdch, *wrch; 175 struct snddev_info *d; 176 intrmask_t s; 177 u_int32_t fmt; 178 int devtype; 179 180 s = spltty(); 181 d = dsp_get_info(i_dev); 182 devtype = PCMDEV(i_dev); 183 184 /* decide default format */ 185 switch (devtype) { 186 case SND_DEV_DSP16: 187 fmt = AFMT_S16_LE; 188 break; 189 190 case SND_DEV_DSP: 191 fmt = AFMT_U8; 192 break; 193 194 case SND_DEV_AUDIO: 195 fmt = AFMT_MU_LAW; 196 break; 197 198 case SND_DEV_NORESET: 199 fmt = 0; 200 break; 201 202 case SND_DEV_DSPREC: 203 fmt = AFMT_U8; 204 if (mode & FWRITE) { 205 splx(s); 206 return EINVAL; 207 } 208 break; 209 210 default: 211 panic("impossible devtype %d", devtype); 212 } 213 214 /* lock snddev so nobody else can monkey with it */ 215 pcm_lock(d); 216 217 rdch = i_dev->si_drv1; 218 wrch = i_dev->si_drv2; 219 220 if ((dsp_get_flags(i_dev) & SD_F_SIMPLEX) && (rdch || wrch)) { 221 /* simplex device, already open, exit */ 222 pcm_unlock(d); 223 splx(s); 224 return EBUSY; 225 } 226 227 if (((flags & FREAD) && rdch) || ((flags & FWRITE) && wrch)) { 228 /* device already open in one or both directions */ 229 pcm_unlock(d); 230 splx(s); 231 return EBUSY; 232 } 233 234 /* if we get here, the open request is valid */ 235 if (flags & FREAD) { 236 /* open for read */ 237 if (devtype == SND_DEV_DSPREC) 238 rdch = pcm_chnalloc(d, PCMDIR_REC, p->p_pid, PCMCHAN(i_dev)); 239 else 240 rdch = pcm_chnalloc(d, PCMDIR_REC, p->p_pid, -1); 241 if (!rdch) { 242 /* no channel available, exit */ 243 pcm_unlock(d); 244 splx(s); 245 return EBUSY; 246 } 247 /* got a channel, already locked for us */ 248 } 249 250 if (flags & FWRITE) { 251 /* open for write */ 252 wrch = pcm_chnalloc(d, PCMDIR_PLAY, p->p_pid, -1); 253 if (!wrch) { 254 /* no channel available */ 255 if (rdch && (flags & FREAD)) { 256 /* just opened a read channel, release it */ 257 pcm_chnrelease(rdch); 258 } 259 /* exit */ 260 pcm_unlock(d); 261 splx(s); 262 return EBUSY; 263 } 264 /* got a channel, already locked for us */ 265 } 266 267 i_dev->si_drv1 = rdch; 268 i_dev->si_drv2 = wrch; 269 pcm_unlock(d); 270 /* finished with snddev, new channels still locked */ 271 272 /* bump refcounts, reset and unlock any channels that we just opened */ 273 if (flags & FREAD) { 274 if (chn_reset(rdch, fmt)) { 275 pcm_lock(d); 276 pcm_chnrelease(rdch); 277 if (wrch && (flags & FWRITE)) 278 pcm_chnrelease(wrch); 279 pcm_unlock(d); 280 splx(s); 281 return ENODEV; 282 } 283 if (flags & O_NONBLOCK) 284 rdch->flags |= CHN_F_NBIO; 285 pcm_chnref(rdch, 1); 286 CHN_UNLOCK(rdch); 287 } 288 if (flags & FWRITE) { 289 if (chn_reset(wrch, fmt)) { 290 pcm_lock(d); 291 pcm_chnrelease(wrch); 292 if (flags & FREAD) { 293 CHN_LOCK(rdch); 294 pcm_chnref(rdch, -1); 295 pcm_chnrelease(rdch); 296 CHN_UNLOCK(rdch); 297 } 298 pcm_unlock(d); 299 splx(s); 300 return ENODEV; 301 } 302 if (flags & O_NONBLOCK) 303 wrch->flags |= CHN_F_NBIO; 304 pcm_chnref(wrch, 1); 305 CHN_UNLOCK(wrch); 306 } 307 splx(s); 308 return 0; 309 } 310 311 static int 312 dsp_close(dev_t i_dev, int flags, int mode, struct proc *p) 313 { 314 struct pcm_channel *rdch, *wrch; 315 struct snddev_info *d; 316 intrmask_t s; 317 int exit; 318 319 s = spltty(); 320 d = dsp_get_info(i_dev); 321 pcm_lock(d); 322 rdch = i_dev->si_drv1; 323 wrch = i_dev->si_drv2; 324 325 exit = 0; 326 327 /* decrement refcount for each channel, exit if nonzero */ 328 if (rdch) { 329 CHN_LOCK(rdch); 330 if (pcm_chnref(rdch, -1) > 0) { 331 CHN_UNLOCK(rdch); 332 exit = 1; 333 } 334 } 335 if (wrch) { 336 CHN_LOCK(wrch); 337 if (pcm_chnref(wrch, -1) > 0) { 338 CHN_UNLOCK(wrch); 339 exit = 1; 340 } 341 } 342 if (exit) { 343 pcm_unlock(d); 344 splx(s); 345 return 0; 346 } 347 348 /* both refcounts are zero, abort and release */ 349 350 if (pcm_getfakechan(d)) 351 pcm_getfakechan(d)->flags = 0; 352 353 i_dev->si_drv1 = NULL; 354 i_dev->si_drv2 = NULL; 355 356 dsp_set_flags(i_dev, dsp_get_flags(i_dev) & ~SD_F_TRANSIENT); 357 pcm_unlock(d); 358 359 if (rdch) { 360 chn_abort(rdch); /* won't sleep */ 361 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 362 chn_reset(rdch, 0); 363 pcm_chnrelease(rdch); 364 } 365 if (wrch) { 366 chn_flush(wrch); /* may sleep */ 367 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 368 chn_reset(wrch, 0); 369 pcm_chnrelease(wrch); 370 } 371 372 splx(s); 373 return 0; 374 } 375 376 static int 377 dsp_read(dev_t i_dev, struct uio *buf, int flag) 378 { 379 struct pcm_channel *rdch, *wrch; 380 intrmask_t s; 381 int ret; 382 383 s = spltty(); 384 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD); 385 386 KASSERT(rdch, ("dsp_read: nonexistant channel")); 387 KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel")); 388 389 if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { 390 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); 391 splx(s); 392 return EINVAL; 393 } 394 if (!(rdch->flags & CHN_F_RUNNING)) 395 rdch->flags |= CHN_F_RUNNING; 396 ret = chn_read(rdch, buf); 397 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); 398 399 splx(s); 400 return ret; 401 } 402 403 static int 404 dsp_write(dev_t i_dev, struct uio *buf, int flag) 405 { 406 struct pcm_channel *rdch, *wrch; 407 intrmask_t s; 408 int ret; 409 410 s = spltty(); 411 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_WR); 412 413 KASSERT(wrch, ("dsp_write: nonexistant channel")); 414 KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel")); 415 416 if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { 417 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); 418 splx(s); 419 return EINVAL; 420 } 421 if (!(wrch->flags & CHN_F_RUNNING)) 422 wrch->flags |= CHN_F_RUNNING; 423 ret = chn_write(wrch, buf); 424 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); 425 426 splx(s); 427 return ret; 428 } 429 430 static int 431 dsp_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct proc *p) 432 { 433 struct pcm_channel *wrch, *rdch; 434 struct snddev_info *d; 435 intrmask_t s; 436 int kill; 437 int ret = 0, *arg_i = (int *)arg, tmp; 438 439 /* 440 * this is an evil hack to allow broken apps to perform mixer ioctls 441 * on dsp devices. 442 */ 443 444 if (IOCGROUP(cmd) == 'M') { 445 dev_t pdev; 446 447 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0)); 448 return mixer_ioctl(pdev, cmd, arg, mode, p); 449 } 450 451 s = spltty(); 452 d = dsp_get_info(i_dev); 453 getchns(i_dev, &rdch, &wrch, 0); 454 455 kill = 0; 456 if (wrch && (wrch->flags & CHN_F_DEAD)) 457 kill |= 1; 458 if (rdch && (rdch->flags & CHN_F_DEAD)) 459 kill |= 2; 460 if (kill == 3) { 461 relchns(i_dev, rdch, wrch, 0); 462 splx(s); 463 return EINVAL; 464 } 465 if (kill & 1) 466 wrch = NULL; 467 if (kill & 2) 468 rdch = NULL; 469 470 switch(cmd) { 471 #ifdef OLDPCM_IOCTL 472 /* 473 * we start with the new ioctl interface. 474 */ 475 case AIONWRITE: /* how many bytes can write ? */ 476 /* 477 if (wrch && wrch->bufhard.dl) 478 while (chn_wrfeed(wrch) == 0); 479 */ 480 *arg_i = wrch? sndbuf_getfree(wrch->bufsoft) : 0; 481 break; 482 483 case AIOSSIZE: /* set the current blocksize */ 484 { 485 struct snd_size *p = (struct snd_size *)arg; 486 487 p->play_size = 0; 488 p->rec_size = 0; 489 if (wrch) { 490 CHN_LOCK(wrch); 491 chn_setblocksize(wrch, 2, p->play_size); 492 p->play_size = sndbuf_getblksz(wrch->bufsoft); 493 CHN_UNLOCK(wrch); 494 } 495 if (rdch) { 496 CHN_LOCK(rdch); 497 chn_setblocksize(rdch, 2, p->rec_size); 498 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 499 CHN_UNLOCK(rdch); 500 } 501 } 502 break; 503 case AIOGSIZE: /* get the current blocksize */ 504 { 505 struct snd_size *p = (struct snd_size *)arg; 506 507 if (wrch) 508 p->play_size = sndbuf_getblksz(wrch->bufsoft); 509 if (rdch) 510 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 511 } 512 break; 513 514 case AIOSFMT: 515 { 516 snd_chan_param *p = (snd_chan_param *)arg; 517 518 if (wrch) { 519 CHN_LOCK(wrch); 520 chn_setformat(wrch, p->play_format); 521 chn_setspeed(wrch, p->play_rate); 522 CHN_UNLOCK(wrch); 523 } 524 if (rdch) { 525 CHN_LOCK(rdch); 526 chn_setformat(rdch, p->rec_format); 527 chn_setspeed(rdch, p->rec_rate); 528 CHN_UNLOCK(rdch); 529 } 530 } 531 /* FALLTHROUGH */ 532 533 case AIOGFMT: 534 { 535 snd_chan_param *p = (snd_chan_param *)arg; 536 537 p->play_rate = wrch? wrch->speed : 0; 538 p->rec_rate = rdch? rdch->speed : 0; 539 p->play_format = wrch? wrch->format : 0; 540 p->rec_format = rdch? rdch->format : 0; 541 } 542 break; 543 544 case AIOGCAP: /* get capabilities */ 545 { 546 snd_capabilities *p = (snd_capabilities *)arg; 547 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL; 548 dev_t pdev; 549 550 if (rdch) { 551 CHN_LOCK(rdch); 552 rcaps = chn_getcaps(rdch); 553 } 554 if (wrch) { 555 CHN_LOCK(wrch); 556 pcaps = chn_getcaps(wrch); 557 } 558 p->rate_min = max(rcaps? rcaps->minspeed : 0, 559 pcaps? pcaps->minspeed : 0); 560 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 561 pcaps? pcaps->maxspeed : 1000000); 562 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000, 563 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000); 564 /* XXX bad on sb16 */ 565 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & 566 (wrch? chn_getformats(wrch) : 0xffffffff); 567 if (rdch && wrch) 568 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; 569 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0)); 570 p->mixers = 1; /* default: one mixer */ 571 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0; 572 p->left = p->right = 100; 573 if (wrch) 574 CHN_UNLOCK(wrch); 575 if (rdch) 576 CHN_UNLOCK(rdch); 577 } 578 break; 579 580 case AIOSTOP: 581 if (*arg_i == AIOSYNC_PLAY && wrch) 582 *arg_i = chn_abort(wrch); 583 else if (*arg_i == AIOSYNC_CAPTURE && rdch) 584 *arg_i = chn_abort(rdch); 585 else { 586 printf("AIOSTOP: bad channel 0x%x\n", *arg_i); 587 *arg_i = 0; 588 } 589 break; 590 591 case AIOSYNC: 592 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", 593 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); 594 break; 595 #endif 596 /* 597 * here follow the standard ioctls (filio.h etc.) 598 */ 599 case FIONREAD: /* get # bytes to read */ 600 /* if (rdch && rdch->bufhard.dl) 601 while (chn_rdfeed(rdch) == 0); 602 */ *arg_i = rdch? sndbuf_getready(rdch->bufsoft) : 0; 603 break; 604 605 case FIOASYNC: /*set/clear async i/o */ 606 DEB( printf("FIOASYNC\n") ; ) 607 break; 608 609 case SNDCTL_DSP_NONBLOCK: 610 case FIONBIO: /* set/clear non-blocking i/o */ 611 if (rdch) 612 rdch->flags &= ~CHN_F_NBIO; 613 if (wrch) 614 wrch->flags &= ~CHN_F_NBIO; 615 if (*arg_i) { 616 if (rdch) 617 rdch->flags |= CHN_F_NBIO; 618 if (wrch) 619 wrch->flags |= CHN_F_NBIO; 620 } 621 break; 622 623 /* 624 * Finally, here is the linux-compatible ioctl interface 625 */ 626 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) 627 case THE_REAL_SNDCTL_DSP_GETBLKSIZE: 628 case SNDCTL_DSP_GETBLKSIZE: 629 if (wrch) 630 *arg_i = sndbuf_getblksz(wrch->bufsoft); 631 else if (rdch) 632 *arg_i = sndbuf_getblksz(rdch->bufsoft); 633 else 634 *arg_i = 0; 635 break ; 636 637 case SNDCTL_DSP_SETBLKSIZE: 638 RANGE(*arg_i, 16, 65536); 639 if (wrch) { 640 CHN_LOCK(wrch); 641 chn_setblocksize(wrch, 2, *arg_i); 642 CHN_UNLOCK(wrch); 643 } 644 if (rdch) { 645 CHN_LOCK(rdch); 646 chn_setblocksize(rdch, 2, *arg_i); 647 CHN_UNLOCK(rdch); 648 } 649 break; 650 651 case SNDCTL_DSP_RESET: 652 DEB(printf("dsp reset\n")); 653 if (wrch) 654 chn_abort(wrch); 655 if (rdch) 656 chn_abort(rdch); 657 break; 658 659 case SNDCTL_DSP_SYNC: 660 DEB(printf("dsp sync\n")); 661 /* chn_sync may sleep */ 662 if (wrch) { 663 CHN_LOCK(wrch); 664 chn_sync(wrch, sndbuf_getsize(wrch->bufsoft) - 4); 665 CHN_UNLOCK(wrch); 666 } 667 break; 668 669 case SNDCTL_DSP_SPEED: 670 /* chn_setspeed may sleep */ 671 tmp = 0; 672 if (wrch) { 673 CHN_LOCK(wrch); 674 ret = chn_setspeed(wrch, *arg_i); 675 tmp = wrch->speed; 676 CHN_UNLOCK(wrch); 677 } 678 if (rdch && ret == 0) { 679 CHN_LOCK(rdch); 680 ret = chn_setspeed(rdch, *arg_i); 681 if (tmp == 0) 682 tmp = rdch->speed; 683 CHN_UNLOCK(rdch); 684 } 685 *arg_i = tmp; 686 break; 687 688 case SOUND_PCM_READ_RATE: 689 *arg_i = wrch? wrch->speed : rdch->speed; 690 break; 691 692 case SNDCTL_DSP_STEREO: 693 tmp = -1; 694 *arg_i = (*arg_i)? AFMT_STEREO : 0; 695 if (wrch) { 696 CHN_LOCK(wrch); 697 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 698 tmp = (wrch->format & AFMT_STEREO)? 1 : 0; 699 CHN_UNLOCK(wrch); 700 } 701 if (rdch && ret == 0) { 702 CHN_LOCK(rdch); 703 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 704 if (tmp == -1) 705 tmp = (rdch->format & AFMT_STEREO)? 1 : 0; 706 CHN_UNLOCK(rdch); 707 } 708 *arg_i = tmp; 709 break; 710 711 case SOUND_PCM_WRITE_CHANNELS: 712 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 713 if (*arg_i != 0) { 714 tmp = 0; 715 *arg_i = (*arg_i != 1)? AFMT_STEREO : 0; 716 if (wrch) { 717 CHN_LOCK(wrch); 718 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 719 tmp = (wrch->format & AFMT_STEREO)? 2 : 1; 720 CHN_UNLOCK(wrch); 721 } 722 if (rdch && ret == 0) { 723 CHN_LOCK(rdch); 724 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 725 if (tmp == 0) 726 tmp = (rdch->format & AFMT_STEREO)? 2 : 1; 727 CHN_UNLOCK(rdch); 728 } 729 *arg_i = tmp; 730 } else { 731 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; 732 } 733 break; 734 735 case SOUND_PCM_READ_CHANNELS: 736 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; 737 break; 738 739 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 740 *arg_i = wrch? chn_getformats(wrch) : chn_getformats(rdch); 741 break ; 742 743 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 744 /* XXX locking */ 745 if ((*arg_i != AFMT_QUERY)) { 746 tmp = 0; 747 if (wrch) { 748 CHN_LOCK(wrch); 749 ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO)); 750 tmp = wrch->format & ~AFMT_STEREO; 751 CHN_UNLOCK(wrch); 752 } 753 if (rdch && ret == 0) { 754 CHN_LOCK(rdch); 755 ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO)); 756 if (tmp == 0) 757 tmp = rdch->format & ~AFMT_STEREO; 758 CHN_UNLOCK(rdch); 759 } 760 *arg_i = tmp; 761 } else 762 *arg_i = (wrch? wrch->format : rdch->format) & ~AFMT_STEREO; 763 break; 764 765 case SNDCTL_DSP_SETFRAGMENT: 766 /* XXX locking */ 767 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 768 { 769 u_int32_t fragln = (*arg_i) & 0x0000ffff; 770 u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 771 u_int32_t fragsz; 772 773 RANGE(fragln, 4, 16); 774 fragsz = 1 << fragln; 775 776 if (maxfrags == 0) 777 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 778 if (maxfrags < 2) { 779 ret = EINVAL; 780 break; 781 } 782 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 783 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 784 785 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 786 if (rdch) { 787 CHN_LOCK(rdch); 788 ret = chn_setblocksize(rdch, maxfrags, fragsz); 789 maxfrags = sndbuf_getblkcnt(rdch->bufsoft); 790 fragsz = sndbuf_getblksz(rdch->bufsoft); 791 CHN_UNLOCK(rdch); 792 } 793 if (wrch && ret == 0) { 794 CHN_LOCK(wrch); 795 ret = chn_setblocksize(wrch, maxfrags, fragsz); 796 maxfrags = sndbuf_getblkcnt(wrch->bufsoft); 797 fragsz = sndbuf_getblksz(wrch->bufsoft); 798 CHN_UNLOCK(wrch); 799 } 800 801 fragln = 0; 802 while (fragsz > 1) { 803 fragln++; 804 fragsz >>= 1; 805 } 806 *arg_i = (maxfrags << 16) | fragln; 807 } 808 break; 809 810 case SNDCTL_DSP_GETISPACE: 811 /* return the size of data available in the input queue */ 812 { 813 audio_buf_info *a = (audio_buf_info *)arg; 814 if (rdch) { 815 struct snd_dbuf *bs = rdch->bufsoft; 816 817 CHN_LOCK(rdch); 818 a->bytes = sndbuf_getready(bs); 819 a->fragments = a->bytes / sndbuf_getblksz(bs); 820 a->fragstotal = sndbuf_getblkcnt(bs); 821 a->fragsize = sndbuf_getblksz(bs); 822 CHN_UNLOCK(rdch); 823 } 824 } 825 break; 826 827 case SNDCTL_DSP_GETOSPACE: 828 /* return space available in the output queue */ 829 { 830 audio_buf_info *a = (audio_buf_info *)arg; 831 if (wrch) { 832 struct snd_dbuf *bs = wrch->bufsoft; 833 834 CHN_LOCK(wrch); 835 chn_wrupdate(wrch); 836 a->bytes = sndbuf_getfree(bs); 837 a->fragments = a->bytes / sndbuf_getblksz(bs); 838 a->fragstotal = sndbuf_getblkcnt(bs); 839 a->fragsize = sndbuf_getblksz(bs); 840 CHN_UNLOCK(wrch); 841 } 842 } 843 break; 844 845 case SNDCTL_DSP_GETIPTR: 846 { 847 count_info *a = (count_info *)arg; 848 if (rdch) { 849 struct snd_dbuf *bs = rdch->bufsoft; 850 851 CHN_LOCK(rdch); 852 chn_rdupdate(rdch); 853 a->bytes = sndbuf_gettotal(bs); 854 a->blocks = sndbuf_getblocks(bs) - rdch->blocks; 855 a->ptr = sndbuf_getreadyptr(bs); 856 rdch->blocks = sndbuf_getblocks(bs); 857 CHN_UNLOCK(rdch); 858 } else 859 ret = EINVAL; 860 } 861 break; 862 863 case SNDCTL_DSP_GETOPTR: 864 { 865 count_info *a = (count_info *)arg; 866 if (wrch) { 867 struct snd_dbuf *bs = wrch->bufsoft; 868 869 CHN_LOCK(wrch); 870 chn_wrupdate(wrch); 871 a->bytes = sndbuf_gettotal(bs); 872 a->blocks = sndbuf_getblocks(bs) - wrch->blocks; 873 a->ptr = sndbuf_getreadyptr(bs); 874 wrch->blocks = sndbuf_getblocks(bs); 875 CHN_UNLOCK(wrch); 876 } else 877 ret = EINVAL; 878 } 879 break; 880 881 case SNDCTL_DSP_GETCAPS: 882 *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER; 883 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 884 *arg_i |= DSP_CAP_DUPLEX; 885 break; 886 887 case SOUND_PCM_READ_BITS: 888 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_16BIT)? 16 : 8; 889 break; 890 891 case SNDCTL_DSP_SETTRIGGER: 892 if (rdch) { 893 CHN_LOCK(rdch); 894 rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 895 if (*arg_i & PCM_ENABLE_INPUT) 896 chn_start(rdch, 1); 897 else 898 rdch->flags |= CHN_F_NOTRIGGER; 899 CHN_UNLOCK(rdch); 900 } 901 if (wrch) { 902 CHN_LOCK(wrch); 903 wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 904 if (*arg_i & PCM_ENABLE_OUTPUT) 905 chn_start(wrch, 1); 906 else 907 wrch->flags |= CHN_F_NOTRIGGER; 908 CHN_UNLOCK(wrch); 909 } 910 break; 911 912 case SNDCTL_DSP_GETTRIGGER: 913 *arg_i = 0; 914 if (wrch && wrch->flags & CHN_F_TRIGGERED) 915 *arg_i |= PCM_ENABLE_OUTPUT; 916 if (rdch && rdch->flags & CHN_F_TRIGGERED) 917 *arg_i |= PCM_ENABLE_INPUT; 918 break; 919 920 case SNDCTL_DSP_GETODELAY: 921 if (wrch) { 922 struct snd_dbuf *b = wrch->bufhard; 923 struct snd_dbuf *bs = wrch->bufsoft; 924 925 CHN_LOCK(wrch); 926 chn_wrupdate(wrch); 927 *arg_i = sndbuf_getready(b) + sndbuf_getready(bs); 928 CHN_UNLOCK(wrch); 929 } else 930 ret = EINVAL; 931 break; 932 933 case SNDCTL_DSP_POST: 934 if (wrch) { 935 CHN_LOCK(wrch); 936 wrch->flags &= ~CHN_F_NOTRIGGER; 937 chn_start(wrch, 1); 938 CHN_UNLOCK(wrch); 939 } 940 break; 941 942 case SNDCTL_DSP_SETDUPLEX: 943 /* 944 * switch to full-duplex mode if card is in half-duplex 945 * mode and is able to work in full-duplex mode 946 */ 947 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 948 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX); 949 break; 950 951 case SNDCTL_DSP_MAPINBUF: 952 case SNDCTL_DSP_MAPOUTBUF: 953 case SNDCTL_DSP_SETSYNCRO: 954 /* undocumented */ 955 956 case SNDCTL_DSP_SUBDIVIDE: 957 case SOUND_PCM_WRITE_FILTER: 958 case SOUND_PCM_READ_FILTER: 959 /* dunno what these do, don't sound important */ 960 961 default: 962 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd)); 963 ret = EINVAL; 964 break; 965 } 966 relchns(i_dev, rdch, wrch, 0); 967 splx(s); 968 return ret; 969 } 970 971 static int 972 dsp_poll(dev_t i_dev, int events, struct proc *p) 973 { 974 struct pcm_channel *wrch = NULL, *rdch = NULL; 975 intrmask_t s; 976 int ret, e; 977 978 s = spltty(); 979 ret = 0; 980 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 981 982 if (wrch) { 983 e = (events & (POLLOUT | POLLWRNORM)); 984 if (e) 985 ret |= chn_poll(wrch, e, p); 986 } 987 if (rdch) { 988 e = (events & (POLLIN | POLLRDNORM)); 989 if (e) 990 ret |= chn_poll(rdch, e, p); 991 } 992 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 993 994 splx(s); 995 return ret; 996 } 997 998 static int 999 dsp_mmap(dev_t i_dev, vm_offset_t offset, int nprot) 1000 { 1001 struct pcm_channel *wrch = NULL, *rdch = NULL, *c; 1002 intrmask_t s; 1003 int ret; 1004 1005 if (nprot & PROT_EXEC) 1006 return -1; 1007 1008 s = spltty(); 1009 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1010 #if 0 1011 /* 1012 * XXX the linux api uses the nprot to select read/write buffer 1013 * our vm system doesn't allow this, so force write buffer 1014 */ 1015 1016 if (wrch && (nprot & PROT_WRITE)) { 1017 c = wrch; 1018 } else if (rdch && (nprot & PROT_READ)) { 1019 c = rdch; 1020 } else { 1021 splx(s); 1022 return -1; 1023 } 1024 #else 1025 c = wrch; 1026 #endif 1027 1028 if (c == NULL) { 1029 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1030 splx(s); 1031 return -1; 1032 } 1033 1034 if (offset >= sndbuf_getsize(c->bufsoft)) { 1035 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1036 splx(s); 1037 return -1; 1038 } 1039 1040 if (!(c->flags & CHN_F_MAPPED)) 1041 c->flags |= CHN_F_MAPPED; 1042 1043 ret = atop(vtophys(sndbuf_getbufofs(c->bufsoft, offset))); 1044 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1045 1046 splx(s); 1047 return ret; 1048 } 1049 1050 int 1051 dsp_register(int unit, int channel) 1052 { 1053 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP, channel), 1054 UID_ROOT, GID_WHEEL, 0666, "dsp%d.%d", unit, channel); 1055 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP16, channel), 1056 UID_ROOT, GID_WHEEL, 0666, "dspW%d.%d", unit, channel); 1057 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_AUDIO, channel), 1058 UID_ROOT, GID_WHEEL, 0666, "audio%d.%d", unit, channel); 1059 1060 return 0; 1061 } 1062 1063 int 1064 dsp_registerrec(int unit, int channel) 1065 { 1066 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSPREC, channel), 1067 UID_ROOT, GID_WHEEL, 0666, "dspr%d.%d", unit, channel); 1068 1069 return 0; 1070 } 1071 1072 int 1073 dsp_unregister(int unit, int channel) 1074 { 1075 dev_t pdev; 1076 1077 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSP, channel)); 1078 destroy_dev(pdev); 1079 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSP16, channel)); 1080 destroy_dev(pdev); 1081 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_AUDIO, channel)); 1082 destroy_dev(pdev); 1083 1084 return 0; 1085 } 1086 1087 int 1088 dsp_unregisterrec(int unit, int channel) 1089 { 1090 dev_t pdev; 1091 1092 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSPREC, channel)); 1093 destroy_dev(pdev); 1094 1095 return 0; 1096 } 1097 1098 #ifdef USING_DEVFS 1099 static void 1100 dsp_clone(void *arg, char *name, int namelen, dev_t *dev) 1101 { 1102 dev_t pdev; 1103 int i, cont, unit, devtype; 1104 int devtypes[3] = {SND_DEV_DSP, SND_DEV_DSP16, SND_DEV_AUDIO}; 1105 char *devnames[3] = {"dsp", "dspW", "audio"}; 1106 1107 if (*dev != NODEV) 1108 return; 1109 if (pcm_devclass == NULL) 1110 return; 1111 1112 devtype = 0; 1113 unit = -1; 1114 for (i = 0; (i < 3) && (unit == -1); i++) { 1115 devtype = devtypes[i]; 1116 if (strcmp(name, devnames[i]) == 0) { 1117 unit = snd_unit; 1118 } else { 1119 if (dev_stdclone(name, NULL, devnames[i], &unit) != 1) 1120 unit = -1; 1121 } 1122 } 1123 if (unit == -1 || unit >= devclass_get_maxunit(pcm_devclass)) 1124 return; 1125 1126 cont = 1; 1127 for (i = 0; cont; i++) { 1128 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, devtype, i)); 1129 if (pdev->si_flags & SI_NAMED) { 1130 if ((pdev->si_drv1 == NULL) && (pdev->si_drv2 == NULL)) { 1131 *dev = pdev; 1132 return; 1133 } 1134 } else { 1135 cont = 0; 1136 } 1137 } 1138 } 1139 1140 static void 1141 dsp_sysinit(void *p) 1142 { 1143 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000); 1144 } 1145 1146 static void 1147 dsp_sysuninit(void *p) 1148 { 1149 if (dsp_ehtag != NULL) 1150 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag); 1151 } 1152 1153 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL); 1154 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL); 1155 #endif 1156 1157
Cache object: 5539e8b26315b0c6f52d76cb9d44004d
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]