Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/dsp.c
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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: releng/5.1/sys/dev/sound/pcm/dsp.c 114432 2003-05-01 16:31:21Z orion $"); 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 .d_open = dsp_open, 46 .d_close = dsp_close, 47 .d_read = dsp_read, 48 .d_write = dsp_write, 49 .d_ioctl = dsp_ioctl, 50 .d_poll = dsp_poll, 51 .d_mmap = dsp_mmap, 52 .d_name = "dsp", 53 .d_maj = SND_CDEV_MAJOR, 54 }; 55 56 #ifdef USING_DEVFS 57 static eventhandler_tag dsp_ehtag; 58 #endif 59 60 static struct snddev_info * 61 dsp_get_info(dev_t dev) 62 { 63 struct snddev_info *d; 64 int unit; 65 66 unit = PCMUNIT(dev); 67 if (unit >= devclass_get_maxunit(pcm_devclass)) 68 return NULL; 69 d = devclass_get_softc(pcm_devclass, unit); 70 71 return d; 72 } 73 74 static u_int32_t 75 dsp_get_flags(dev_t dev) 76 { 77 device_t bdev; 78 int unit; 79 80 unit = PCMUNIT(dev); 81 if (unit >= devclass_get_maxunit(pcm_devclass)) 82 return 0xffffffff; 83 bdev = devclass_get_device(pcm_devclass, unit); 84 85 return pcm_getflags(bdev); 86 } 87 88 static void 89 dsp_set_flags(dev_t dev, u_int32_t flags) 90 { 91 device_t bdev; 92 int unit; 93 94 unit = PCMUNIT(dev); 95 if (unit >= devclass_get_maxunit(pcm_devclass)) 96 return; 97 bdev = devclass_get_device(pcm_devclass, unit); 98 99 pcm_setflags(bdev, flags); 100 } 101 102 /* 103 * return the channels channels associated with an open device instance. 104 * set the priority if the device is simplex and one direction (only) is 105 * specified. 106 * lock channels specified. 107 */ 108 static int 109 getchns(dev_t dev, struct pcm_channel **rdch, struct pcm_channel **wrch, u_int32_t prio) 110 { 111 struct snddev_info *d; 112 u_int32_t flags; 113 114 flags = dsp_get_flags(dev); 115 d = dsp_get_info(dev); 116 pcm_lock(d); 117 pcm_inprog(d, 1); 118 KASSERT((flags & SD_F_PRIO_SET) != SD_F_PRIO_SET, \ 119 ("getchns: read and write both prioritised")); 120 121 if ((flags & SD_F_PRIO_SET) == 0 && (prio != (SD_F_PRIO_RD | SD_F_PRIO_WR))) { 122 flags |= prio & (SD_F_PRIO_RD | SD_F_PRIO_WR); 123 dsp_set_flags(dev, flags); 124 } 125 126 *rdch = dev->si_drv1; 127 *wrch = dev->si_drv2; 128 if ((flags & SD_F_SIMPLEX) && (flags & SD_F_PRIO_SET)) { 129 if (prio) { 130 if (*rdch && flags & SD_F_PRIO_WR) { 131 dev->si_drv1 = NULL; 132 *rdch = pcm_getfakechan(d); 133 } else if (*wrch && flags & SD_F_PRIO_RD) { 134 dev->si_drv2 = NULL; 135 *wrch = pcm_getfakechan(d); 136 } 137 } 138 139 pcm_getfakechan(d)->flags |= CHN_F_BUSY; 140 } 141 pcm_unlock(d); 142 143 if (*rdch && *rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD)) 144 CHN_LOCK(*rdch); 145 if (*wrch && *wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR)) 146 CHN_LOCK(*wrch); 147 148 return 0; 149 } 150 151 /* unlock specified channels */ 152 static void 153 relchns(dev_t dev, struct pcm_channel *rdch, struct pcm_channel *wrch, u_int32_t prio) 154 { 155 struct snddev_info *d; 156 157 d = dsp_get_info(dev); 158 if (wrch && wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR)) 159 CHN_UNLOCK(wrch); 160 if (rdch && rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD)) 161 CHN_UNLOCK(rdch); 162 pcm_lock(d); 163 pcm_inprog(d, -1); 164 pcm_unlock(d); 165 } 166 167 static int 168 dsp_open(dev_t i_dev, int flags, int mode, struct thread *td) 169 { 170 struct pcm_channel *rdch, *wrch; 171 struct snddev_info *d; 172 intrmask_t s; 173 u_int32_t fmt; 174 int devtype; 175 176 s = spltty(); 177 d = dsp_get_info(i_dev); 178 devtype = PCMDEV(i_dev); 179 180 /* decide default format */ 181 switch (devtype) { 182 case SND_DEV_DSP16: 183 fmt = AFMT_S16_LE; 184 break; 185 186 case SND_DEV_DSP: 187 fmt = AFMT_U8; 188 break; 189 190 case SND_DEV_AUDIO: 191 fmt = AFMT_MU_LAW; 192 break; 193 194 case SND_DEV_NORESET: 195 fmt = 0; 196 break; 197 198 case SND_DEV_DSPREC: 199 fmt = AFMT_U8; 200 if (mode & FWRITE) { 201 splx(s); 202 return EINVAL; 203 } 204 break; 205 206 default: 207 panic("impossible devtype %d", devtype); 208 } 209 210 /* lock snddev so nobody else can monkey with it */ 211 pcm_lock(d); 212 213 rdch = i_dev->si_drv1; 214 wrch = i_dev->si_drv2; 215 216 if ((dsp_get_flags(i_dev) & SD_F_SIMPLEX) && (rdch || wrch)) { 217 /* simplex device, already open, exit */ 218 pcm_unlock(d); 219 splx(s); 220 return EBUSY; 221 } 222 223 if (((flags & FREAD) && rdch) || ((flags & FWRITE) && wrch)) { 224 /* device already open in one or both directions */ 225 pcm_unlock(d); 226 splx(s); 227 return EBUSY; 228 } 229 230 /* if we get here, the open request is valid */ 231 if (flags & FREAD) { 232 /* open for read */ 233 if (devtype == SND_DEV_DSPREC) 234 rdch = pcm_chnalloc(d, PCMDIR_REC, td->td_proc->p_pid, PCMCHAN(i_dev)); 235 else 236 rdch = pcm_chnalloc(d, PCMDIR_REC, td->td_proc->p_pid, -1); 237 if (!rdch) { 238 /* no channel available, exit */ 239 pcm_unlock(d); 240 splx(s); 241 return EBUSY; 242 } 243 /* got a channel, already locked for us */ 244 } 245 246 if (flags & FWRITE) { 247 /* open for write */ 248 wrch = pcm_chnalloc(d, PCMDIR_PLAY, td->td_proc->p_pid, -1); 249 if (!wrch) { 250 /* no channel available */ 251 if (flags & FREAD) { 252 /* just opened a read channel, release it */ 253 pcm_chnrelease(rdch); 254 } 255 /* exit */ 256 pcm_unlock(d); 257 splx(s); 258 return EBUSY; 259 } 260 /* got a channel, already locked for us */ 261 } 262 263 i_dev->si_drv1 = rdch; 264 i_dev->si_drv2 = wrch; 265 266 /* Bump refcounts, reset and unlock any channels that we just opened, 267 * and then release device lock. 268 */ 269 if (flags & FREAD) { 270 if (chn_reset(rdch, fmt)) { 271 pcm_chnrelease(rdch); 272 i_dev->si_drv1 = NULL; 273 if (wrch && (flags & FWRITE)) { 274 pcm_chnrelease(wrch); 275 i_dev->si_drv2 = NULL; 276 } 277 pcm_unlock(d); 278 splx(s); 279 return ENODEV; 280 } 281 if (flags & O_NONBLOCK) 282 rdch->flags |= CHN_F_NBIO; 283 pcm_chnref(rdch, 1); 284 CHN_UNLOCK(rdch); 285 } 286 if (flags & FWRITE) { 287 if (chn_reset(wrch, fmt)) { 288 pcm_chnrelease(wrch); 289 i_dev->si_drv2 = NULL; 290 if (flags & FREAD) { 291 CHN_LOCK(rdch); 292 pcm_chnref(rdch, -1); 293 pcm_chnrelease(rdch); 294 i_dev->si_drv1 = NULL; 295 } 296 pcm_unlock(d); 297 splx(s); 298 return ENODEV; 299 } 300 if (flags & O_NONBLOCK) 301 wrch->flags |= CHN_F_NBIO; 302 pcm_chnref(wrch, 1); 303 CHN_UNLOCK(wrch); 304 } 305 pcm_unlock(d); 306 splx(s); 307 return 0; 308 } 309 310 static int 311 dsp_close(dev_t i_dev, int flags, int mode, struct thread *td) 312 { 313 struct pcm_channel *rdch, *wrch; 314 struct snddev_info *d; 315 intrmask_t s; 316 int exit; 317 318 s = spltty(); 319 d = dsp_get_info(i_dev); 320 pcm_lock(d); 321 rdch = i_dev->si_drv1; 322 wrch = i_dev->si_drv2; 323 324 exit = 0; 325 326 /* decrement refcount for each channel, exit if nonzero */ 327 if (rdch) { 328 CHN_LOCK(rdch); 329 if (pcm_chnref(rdch, -1) > 0) { 330 CHN_UNLOCK(rdch); 331 exit = 1; 332 } 333 } 334 if (wrch) { 335 CHN_LOCK(wrch); 336 if (pcm_chnref(wrch, -1) > 0) { 337 CHN_UNLOCK(wrch); 338 exit = 1; 339 } 340 } 341 if (exit) { 342 pcm_unlock(d); 343 splx(s); 344 return 0; 345 } 346 347 /* both refcounts are zero, abort and release */ 348 349 if (pcm_getfakechan(d)) 350 pcm_getfakechan(d)->flags = 0; 351 352 i_dev->si_drv1 = NULL; 353 i_dev->si_drv2 = NULL; 354 355 dsp_set_flags(i_dev, dsp_get_flags(i_dev) & ~SD_F_TRANSIENT); 356 pcm_unlock(d); 357 358 if (rdch) { 359 chn_abort(rdch); /* won't sleep */ 360 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 361 chn_reset(rdch, 0); 362 pcm_chnrelease(rdch); 363 } 364 if (wrch) { 365 chn_flush(wrch); /* may sleep */ 366 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 367 chn_reset(wrch, 0); 368 pcm_chnrelease(wrch); 369 } 370 371 splx(s); 372 return 0; 373 } 374 375 static int 376 dsp_read(dev_t i_dev, struct uio *buf, int flag) 377 { 378 struct pcm_channel *rdch, *wrch; 379 intrmask_t s; 380 int ret; 381 382 s = spltty(); 383 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD); 384 385 KASSERT(rdch, ("dsp_read: nonexistant channel")); 386 KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel")); 387 388 if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { 389 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); 390 splx(s); 391 return EINVAL; 392 } 393 if (!(rdch->flags & CHN_F_RUNNING)) 394 rdch->flags |= CHN_F_RUNNING; 395 ret = chn_read(rdch, buf); 396 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); 397 398 splx(s); 399 return ret; 400 } 401 402 static int 403 dsp_write(dev_t i_dev, struct uio *buf, int flag) 404 { 405 struct pcm_channel *rdch, *wrch; 406 intrmask_t s; 407 int ret; 408 409 s = spltty(); 410 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_WR); 411 412 KASSERT(wrch, ("dsp_write: nonexistant channel")); 413 KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel")); 414 415 if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { 416 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); 417 splx(s); 418 return EINVAL; 419 } 420 if (!(wrch->flags & CHN_F_RUNNING)) 421 wrch->flags |= CHN_F_RUNNING; 422 ret = chn_write(wrch, buf); 423 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); 424 425 splx(s); 426 return ret; 427 } 428 429 static int 430 dsp_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td) 431 { 432 struct pcm_channel *wrch, *rdch; 433 struct snddev_info *d; 434 intrmask_t s; 435 int kill; 436 int ret = 0, *arg_i = (int *)arg, tmp; 437 438 /* 439 * this is an evil hack to allow broken apps to perform mixer ioctls 440 * on dsp devices. 441 */ 442 443 if (IOCGROUP(cmd) == 'M') { 444 dev_t pdev; 445 446 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0)); 447 return mixer_ioctl(pdev, cmd, arg, mode, td); 448 } 449 450 s = spltty(); 451 d = dsp_get_info(i_dev); 452 getchns(i_dev, &rdch, &wrch, 0); 453 454 kill = 0; 455 if (wrch && (wrch->flags & CHN_F_DEAD)) 456 kill |= 1; 457 if (rdch && (rdch->flags & CHN_F_DEAD)) 458 kill |= 2; 459 if (kill == 3) { 460 relchns(i_dev, rdch, wrch, 0); 461 splx(s); 462 return EINVAL; 463 } 464 if (kill & 1) 465 wrch = NULL; 466 if (kill & 2) 467 rdch = NULL; 468 469 switch(cmd) { 470 #ifdef OLDPCM_IOCTL 471 /* 472 * we start with the new ioctl interface. 473 */ 474 case AIONWRITE: /* how many bytes can write ? */ 475 /* 476 if (wrch && wrch->bufhard.dl) 477 while (chn_wrfeed(wrch) == 0); 478 */ 479 *arg_i = wrch? sndbuf_getfree(wrch->bufsoft) : 0; 480 break; 481 482 case AIOSSIZE: /* set the current blocksize */ 483 { 484 struct snd_size *p = (struct snd_size *)arg; 485 486 p->play_size = 0; 487 p->rec_size = 0; 488 if (wrch) { 489 CHN_LOCK(wrch); 490 chn_setblocksize(wrch, 2, p->play_size); 491 p->play_size = sndbuf_getblksz(wrch->bufsoft); 492 CHN_UNLOCK(wrch); 493 } 494 if (rdch) { 495 CHN_LOCK(rdch); 496 chn_setblocksize(rdch, 2, p->rec_size); 497 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 498 CHN_UNLOCK(rdch); 499 } 500 } 501 break; 502 case AIOGSIZE: /* get the current blocksize */ 503 { 504 struct snd_size *p = (struct snd_size *)arg; 505 506 if (wrch) 507 p->play_size = sndbuf_getblksz(wrch->bufsoft); 508 if (rdch) 509 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 510 } 511 break; 512 513 case AIOSFMT: 514 { 515 snd_chan_param *p = (snd_chan_param *)arg; 516 517 if (wrch) { 518 CHN_LOCK(wrch); 519 chn_setformat(wrch, p->play_format); 520 chn_setspeed(wrch, p->play_rate); 521 CHN_UNLOCK(wrch); 522 } 523 if (rdch) { 524 CHN_LOCK(rdch); 525 chn_setformat(rdch, p->rec_format); 526 chn_setspeed(rdch, p->rec_rate); 527 CHN_UNLOCK(rdch); 528 } 529 } 530 /* FALLTHROUGH */ 531 532 case AIOGFMT: 533 { 534 snd_chan_param *p = (snd_chan_param *)arg; 535 536 p->play_rate = wrch? wrch->speed : 0; 537 p->rec_rate = rdch? rdch->speed : 0; 538 p->play_format = wrch? wrch->format : 0; 539 p->rec_format = rdch? rdch->format : 0; 540 } 541 break; 542 543 case AIOGCAP: /* get capabilities */ 544 { 545 snd_capabilities *p = (snd_capabilities *)arg; 546 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL; 547 dev_t pdev; 548 549 if (rdch) { 550 CHN_LOCK(rdch); 551 rcaps = chn_getcaps(rdch); 552 } 553 if (wrch) { 554 CHN_LOCK(wrch); 555 pcaps = chn_getcaps(wrch); 556 } 557 p->rate_min = max(rcaps? rcaps->minspeed : 0, 558 pcaps? pcaps->minspeed : 0); 559 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 560 pcaps? pcaps->maxspeed : 1000000); 561 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000, 562 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000); 563 /* XXX bad on sb16 */ 564 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & 565 (wrch? chn_getformats(wrch) : 0xffffffff); 566 if (rdch && wrch) 567 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; 568 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0)); 569 p->mixers = 1; /* default: one mixer */ 570 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0; 571 p->left = p->right = 100; 572 if (wrch) 573 CHN_UNLOCK(wrch); 574 if (rdch) 575 CHN_UNLOCK(rdch); 576 } 577 break; 578 579 case AIOSTOP: 580 if (*arg_i == AIOSYNC_PLAY && wrch) 581 *arg_i = chn_abort(wrch); 582 else if (*arg_i == AIOSYNC_CAPTURE && rdch) 583 *arg_i = chn_abort(rdch); 584 else { 585 printf("AIOSTOP: bad channel 0x%x\n", *arg_i); 586 *arg_i = 0; 587 } 588 break; 589 590 case AIOSYNC: 591 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", 592 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); 593 break; 594 #endif 595 /* 596 * here follow the standard ioctls (filio.h etc.) 597 */ 598 case FIONREAD: /* get # bytes to read */ 599 /* if (rdch && rdch->bufhard.dl) 600 while (chn_rdfeed(rdch) == 0); 601 */ *arg_i = rdch? sndbuf_getready(rdch->bufsoft) : 0; 602 break; 603 604 case FIOASYNC: /*set/clear async i/o */ 605 DEB( printf("FIOASYNC\n") ; ) 606 break; 607 608 case SNDCTL_DSP_NONBLOCK: 609 case FIONBIO: /* set/clear non-blocking i/o */ 610 if (rdch) 611 rdch->flags &= ~CHN_F_NBIO; 612 if (wrch) 613 wrch->flags &= ~CHN_F_NBIO; 614 if (*arg_i) { 615 if (rdch) 616 rdch->flags |= CHN_F_NBIO; 617 if (wrch) 618 wrch->flags |= CHN_F_NBIO; 619 } 620 break; 621 622 /* 623 * Finally, here is the linux-compatible ioctl interface 624 */ 625 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) 626 case THE_REAL_SNDCTL_DSP_GETBLKSIZE: 627 case SNDCTL_DSP_GETBLKSIZE: 628 if (wrch) 629 *arg_i = sndbuf_getblksz(wrch->bufsoft); 630 else if (rdch) 631 *arg_i = sndbuf_getblksz(rdch->bufsoft); 632 else 633 *arg_i = 0; 634 break ; 635 636 case SNDCTL_DSP_SETBLKSIZE: 637 RANGE(*arg_i, 16, 65536); 638 if (wrch) { 639 CHN_LOCK(wrch); 640 chn_setblocksize(wrch, 2, *arg_i); 641 CHN_UNLOCK(wrch); 642 } 643 if (rdch) { 644 CHN_LOCK(rdch); 645 chn_setblocksize(rdch, 2, *arg_i); 646 CHN_UNLOCK(rdch); 647 } 648 break; 649 650 case SNDCTL_DSP_RESET: 651 DEB(printf("dsp reset\n")); 652 if (wrch) 653 chn_abort(wrch); 654 if (rdch) 655 chn_abort(rdch); 656 break; 657 658 case SNDCTL_DSP_SYNC: 659 DEB(printf("dsp sync\n")); 660 /* chn_sync may sleep */ 661 if (wrch) { 662 CHN_LOCK(wrch); 663 chn_sync(wrch, sndbuf_getsize(wrch->bufsoft) - 4); 664 CHN_UNLOCK(wrch); 665 } 666 break; 667 668 case SNDCTL_DSP_SPEED: 669 /* chn_setspeed may sleep */ 670 tmp = 0; 671 if (wrch) { 672 CHN_LOCK(wrch); 673 ret = chn_setspeed(wrch, *arg_i); 674 tmp = wrch->speed; 675 CHN_UNLOCK(wrch); 676 } 677 if (rdch && ret == 0) { 678 CHN_LOCK(rdch); 679 ret = chn_setspeed(rdch, *arg_i); 680 if (tmp == 0) 681 tmp = rdch->speed; 682 CHN_UNLOCK(rdch); 683 } 684 *arg_i = tmp; 685 break; 686 687 case SOUND_PCM_READ_RATE: 688 *arg_i = wrch? wrch->speed : rdch->speed; 689 break; 690 691 case SNDCTL_DSP_STEREO: 692 tmp = -1; 693 *arg_i = (*arg_i)? AFMT_STEREO : 0; 694 if (wrch) { 695 CHN_LOCK(wrch); 696 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 697 tmp = (wrch->format & AFMT_STEREO)? 1 : 0; 698 CHN_UNLOCK(wrch); 699 } 700 if (rdch && ret == 0) { 701 CHN_LOCK(rdch); 702 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 703 if (tmp == -1) 704 tmp = (rdch->format & AFMT_STEREO)? 1 : 0; 705 CHN_UNLOCK(rdch); 706 } 707 *arg_i = tmp; 708 break; 709 710 case SOUND_PCM_WRITE_CHANNELS: 711 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 712 if (*arg_i != 0) { 713 tmp = 0; 714 *arg_i = (*arg_i != 1)? AFMT_STEREO : 0; 715 if (wrch) { 716 CHN_LOCK(wrch); 717 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 718 tmp = (wrch->format & AFMT_STEREO)? 2 : 1; 719 CHN_UNLOCK(wrch); 720 } 721 if (rdch && ret == 0) { 722 CHN_LOCK(rdch); 723 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 724 if (tmp == 0) 725 tmp = (rdch->format & AFMT_STEREO)? 2 : 1; 726 CHN_UNLOCK(rdch); 727 } 728 *arg_i = tmp; 729 } else { 730 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; 731 } 732 break; 733 734 case SOUND_PCM_READ_CHANNELS: 735 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; 736 break; 737 738 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 739 *arg_i = wrch? chn_getformats(wrch) : chn_getformats(rdch); 740 break ; 741 742 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 743 /* XXX locking */ 744 if ((*arg_i != AFMT_QUERY)) { 745 tmp = 0; 746 if (wrch) { 747 CHN_LOCK(wrch); 748 ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO)); 749 tmp = wrch->format & ~AFMT_STEREO; 750 CHN_UNLOCK(wrch); 751 } 752 if (rdch && ret == 0) { 753 CHN_LOCK(rdch); 754 ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO)); 755 if (tmp == 0) 756 tmp = rdch->format & ~AFMT_STEREO; 757 CHN_UNLOCK(rdch); 758 } 759 *arg_i = tmp; 760 } else 761 *arg_i = (wrch? wrch->format : rdch->format) & ~AFMT_STEREO; 762 break; 763 764 case SNDCTL_DSP_SETFRAGMENT: 765 /* XXX locking */ 766 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 767 { 768 u_int32_t fragln = (*arg_i) & 0x0000ffff; 769 u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 770 u_int32_t fragsz; 771 772 RANGE(fragln, 4, 16); 773 fragsz = 1 << fragln; 774 775 if (maxfrags == 0) 776 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 777 if (maxfrags < 2) { 778 ret = EINVAL; 779 break; 780 } 781 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 782 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 783 784 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 785 if (rdch) { 786 CHN_LOCK(rdch); 787 ret = chn_setblocksize(rdch, maxfrags, fragsz); 788 maxfrags = sndbuf_getblkcnt(rdch->bufsoft); 789 fragsz = sndbuf_getblksz(rdch->bufsoft); 790 CHN_UNLOCK(rdch); 791 } 792 if (wrch && ret == 0) { 793 CHN_LOCK(wrch); 794 ret = chn_setblocksize(wrch, maxfrags, fragsz); 795 maxfrags = sndbuf_getblkcnt(wrch->bufsoft); 796 fragsz = sndbuf_getblksz(wrch->bufsoft); 797 CHN_UNLOCK(wrch); 798 } 799 800 fragln = 0; 801 while (fragsz > 1) { 802 fragln++; 803 fragsz >>= 1; 804 } 805 *arg_i = (maxfrags << 16) | fragln; 806 } 807 break; 808 809 case SNDCTL_DSP_GETISPACE: 810 /* return the size of data available in the input queue */ 811 { 812 audio_buf_info *a = (audio_buf_info *)arg; 813 if (rdch) { 814 struct snd_dbuf *bs = rdch->bufsoft; 815 816 CHN_LOCK(rdch); 817 a->bytes = sndbuf_getready(bs); 818 a->fragments = a->bytes / sndbuf_getblksz(bs); 819 a->fragstotal = sndbuf_getblkcnt(bs); 820 a->fragsize = sndbuf_getblksz(bs); 821 CHN_UNLOCK(rdch); 822 } 823 } 824 break; 825 826 case SNDCTL_DSP_GETOSPACE: 827 /* return space available in the output queue */ 828 { 829 audio_buf_info *a = (audio_buf_info *)arg; 830 if (wrch) { 831 struct snd_dbuf *bs = wrch->bufsoft; 832 833 CHN_LOCK(wrch); 834 chn_wrupdate(wrch); 835 a->bytes = sndbuf_getfree(bs); 836 a->fragments = a->bytes / sndbuf_getblksz(bs); 837 a->fragstotal = sndbuf_getblkcnt(bs); 838 a->fragsize = sndbuf_getblksz(bs); 839 CHN_UNLOCK(wrch); 840 } 841 } 842 break; 843 844 case SNDCTL_DSP_GETIPTR: 845 { 846 count_info *a = (count_info *)arg; 847 if (rdch) { 848 struct snd_dbuf *bs = rdch->bufsoft; 849 850 CHN_LOCK(rdch); 851 chn_rdupdate(rdch); 852 a->bytes = sndbuf_gettotal(bs); 853 a->blocks = sndbuf_getblocks(bs) - rdch->blocks; 854 a->ptr = sndbuf_getreadyptr(bs); 855 rdch->blocks = sndbuf_getblocks(bs); 856 CHN_UNLOCK(rdch); 857 } else 858 ret = EINVAL; 859 } 860 break; 861 862 case SNDCTL_DSP_GETOPTR: 863 { 864 count_info *a = (count_info *)arg; 865 if (wrch) { 866 struct snd_dbuf *bs = wrch->bufsoft; 867 868 CHN_LOCK(wrch); 869 chn_wrupdate(wrch); 870 a->bytes = sndbuf_gettotal(bs); 871 a->blocks = sndbuf_getblocks(bs) - wrch->blocks; 872 a->ptr = sndbuf_getreadyptr(bs); 873 wrch->blocks = sndbuf_getblocks(bs); 874 CHN_UNLOCK(wrch); 875 } else 876 ret = EINVAL; 877 } 878 break; 879 880 case SNDCTL_DSP_GETCAPS: 881 *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER; 882 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 883 *arg_i |= DSP_CAP_DUPLEX; 884 break; 885 886 case SOUND_PCM_READ_BITS: 887 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_16BIT)? 16 : 8; 888 break; 889 890 case SNDCTL_DSP_SETTRIGGER: 891 if (rdch) { 892 CHN_LOCK(rdch); 893 rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 894 if (*arg_i & PCM_ENABLE_INPUT) 895 chn_start(rdch, 1); 896 else 897 rdch->flags |= CHN_F_NOTRIGGER; 898 CHN_UNLOCK(rdch); 899 } 900 if (wrch) { 901 CHN_LOCK(wrch); 902 wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 903 if (*arg_i & PCM_ENABLE_OUTPUT) 904 chn_start(wrch, 1); 905 else 906 wrch->flags |= CHN_F_NOTRIGGER; 907 CHN_UNLOCK(wrch); 908 } 909 break; 910 911 case SNDCTL_DSP_GETTRIGGER: 912 *arg_i = 0; 913 if (wrch && wrch->flags & CHN_F_TRIGGERED) 914 *arg_i |= PCM_ENABLE_OUTPUT; 915 if (rdch && rdch->flags & CHN_F_TRIGGERED) 916 *arg_i |= PCM_ENABLE_INPUT; 917 break; 918 919 case SNDCTL_DSP_GETODELAY: 920 if (wrch) { 921 struct snd_dbuf *b = wrch->bufhard; 922 struct snd_dbuf *bs = wrch->bufsoft; 923 924 CHN_LOCK(wrch); 925 chn_wrupdate(wrch); 926 *arg_i = sndbuf_getready(b) + sndbuf_getready(bs); 927 CHN_UNLOCK(wrch); 928 } else 929 ret = EINVAL; 930 break; 931 932 case SNDCTL_DSP_POST: 933 if (wrch) { 934 CHN_LOCK(wrch); 935 wrch->flags &= ~CHN_F_NOTRIGGER; 936 chn_start(wrch, 1); 937 CHN_UNLOCK(wrch); 938 } 939 break; 940 941 case SNDCTL_DSP_MAPINBUF: 942 case SNDCTL_DSP_MAPOUTBUF: 943 case SNDCTL_DSP_SETSYNCRO: 944 /* undocumented */ 945 946 case SNDCTL_DSP_SUBDIVIDE: 947 case SOUND_PCM_WRITE_FILTER: 948 case SOUND_PCM_READ_FILTER: 949 /* dunno what these do, don't sound important */ 950 default: 951 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd)); 952 ret = EINVAL; 953 break; 954 } 955 relchns(i_dev, rdch, wrch, 0); 956 splx(s); 957 return ret; 958 } 959 960 static int 961 dsp_poll(dev_t i_dev, int events, struct thread *td) 962 { 963 struct pcm_channel *wrch = NULL, *rdch = NULL; 964 intrmask_t s; 965 int ret, e; 966 967 s = spltty(); 968 ret = 0; 969 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 970 971 if (wrch) { 972 e = (events & (POLLOUT | POLLWRNORM)); 973 if (e) 974 ret |= chn_poll(wrch, e, td); 975 } 976 if (rdch) { 977 e = (events & (POLLIN | POLLRDNORM)); 978 if (e) 979 ret |= chn_poll(rdch, e, td); 980 } 981 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 982 983 splx(s); 984 return ret; 985 } 986 987 static int 988 dsp_mmap(dev_t i_dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot) 989 { 990 struct pcm_channel *wrch = NULL, *rdch = NULL, *c; 991 intrmask_t s; 992 993 if (nprot & PROT_EXEC) 994 return -1; 995 996 s = spltty(); 997 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 998 #if 0 999 /* 1000 * XXX the linux api uses the nprot to select read/write buffer 1001 * our vm system doesn't allow this, so force write buffer 1002 */ 1003 1004 if (wrch && (nprot & PROT_WRITE)) { 1005 c = wrch; 1006 } else if (rdch && (nprot & PROT_READ)) { 1007 c = rdch; 1008 } else { 1009 splx(s); 1010 return -1; 1011 } 1012 #else 1013 c = wrch; 1014 #endif 1015 1016 if (c == NULL) { 1017 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1018 splx(s); 1019 return -1; 1020 } 1021 1022 if (offset >= sndbuf_getsize(c->bufsoft)) { 1023 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1024 splx(s); 1025 return -1; 1026 } 1027 1028 if (!(c->flags & CHN_F_MAPPED)) 1029 c->flags |= CHN_F_MAPPED; 1030 1031 *paddr = vtophys(sndbuf_getbufofs(c->bufsoft, offset)); 1032 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1033 1034 splx(s); 1035 return 0; 1036 } 1037 1038 int 1039 dsp_register(int unit, int channel) 1040 { 1041 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP, channel), 1042 UID_ROOT, GID_WHEEL, 0666, "dsp%d.%d", unit, channel); 1043 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP16, channel), 1044 UID_ROOT, GID_WHEEL, 0666, "dspW%d.%d", unit, channel); 1045 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_AUDIO, channel), 1046 UID_ROOT, GID_WHEEL, 0666, "audio%d.%d", unit, channel); 1047 1048 return 0; 1049 } 1050 1051 int 1052 dsp_registerrec(int unit, int channel) 1053 { 1054 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSPREC, channel), 1055 UID_ROOT, GID_WHEEL, 0666, "dspr%d.%d", unit, channel); 1056 1057 return 0; 1058 } 1059 1060 int 1061 dsp_unregister(int unit, int channel) 1062 { 1063 dev_t pdev; 1064 1065 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSP, channel)); 1066 destroy_dev(pdev); 1067 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSP16, channel)); 1068 destroy_dev(pdev); 1069 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_AUDIO, channel)); 1070 destroy_dev(pdev); 1071 1072 return 0; 1073 } 1074 1075 int 1076 dsp_unregisterrec(int unit, int channel) 1077 { 1078 dev_t pdev; 1079 1080 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSPREC, channel)); 1081 destroy_dev(pdev); 1082 1083 return 0; 1084 } 1085 1086 #ifdef USING_DEVFS 1087 static void 1088 dsp_clone(void *arg, char *name, int namelen, dev_t *dev) 1089 { 1090 dev_t pdev; 1091 int i, cont, unit, devtype; 1092 int devtypes[3] = {SND_DEV_DSP, SND_DEV_DSP16, SND_DEV_AUDIO}; 1093 char *devnames[3] = {"dsp", "dspW", "audio"}; 1094 1095 if (*dev != NODEV) 1096 return; 1097 if (pcm_devclass == NULL) 1098 return; 1099 1100 devtype = 0; 1101 unit = -1; 1102 for (i = 0; (i < 3) && (unit == -1); i++) { 1103 devtype = devtypes[i]; 1104 if (strcmp(name, devnames[i]) == 0) { 1105 unit = snd_unit; 1106 } else { 1107 if (dev_stdclone(name, NULL, devnames[i], &unit) != 1) 1108 unit = -1; 1109 } 1110 } 1111 if (unit == -1 || unit >= devclass_get_maxunit(pcm_devclass)) 1112 return; 1113 1114 cont = 1; 1115 for (i = 0; cont; i++) { 1116 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, devtype, i)); 1117 if (pdev->si_flags & SI_NAMED) { 1118 if ((pdev->si_drv1 == NULL) && (pdev->si_drv2 == NULL)) { 1119 *dev = pdev; 1120 return; 1121 } 1122 } else { 1123 cont = 0; 1124 } 1125 } 1126 } 1127 1128 static void 1129 dsp_sysinit(void *p) 1130 { 1131 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000); 1132 } 1133 1134 static void 1135 dsp_sysuninit(void *p) 1136 { 1137 if (dsp_ehtag != NULL) 1138 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag); 1139 } 1140 1141 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL); 1142 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL); 1143 #endif 1144 1145
Cache object: 03dcb054c60348235ebbfea5c50f06de
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