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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 <cg@freebsd.org> 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/5.2/sys/dev/sound/pcm/dsp.c 122461 2003-11-11 05:38:28Z scottl $"); 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 int rdref; 176 int error; 177 178 s = spltty(); 179 d = dsp_get_info(i_dev); 180 devtype = PCMDEV(i_dev); 181 182 /* decide default format */ 183 switch (devtype) { 184 case SND_DEV_DSP16: 185 fmt = AFMT_S16_LE; 186 break; 187 188 case SND_DEV_DSP: 189 fmt = AFMT_U8; 190 break; 191 192 case SND_DEV_AUDIO: 193 fmt = AFMT_MU_LAW; 194 break; 195 196 case SND_DEV_NORESET: 197 fmt = 0; 198 break; 199 200 case SND_DEV_DSPREC: 201 fmt = AFMT_U8; 202 if (mode & FWRITE) { 203 splx(s); 204 return EINVAL; 205 } 206 break; 207 208 default: 209 panic("impossible devtype %d", devtype); 210 } 211 212 rdref = 0; 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 /* we're a simplex device and already open, no go */ 222 pcm_unlock(d); 223 splx(s); 224 return EBUSY; 225 } 226 227 if (((flags & FREAD) && rdch) || ((flags & FWRITE) && wrch)) { 228 /* 229 * device already open in one or both directions that 230 * the opener wants; we can't handle this. 231 */ 232 pcm_unlock(d); 233 splx(s); 234 return EBUSY; 235 } 236 237 /* 238 * if we get here, the open request is valid- either: 239 * * we were previously not open 240 * * we were open for play xor record and the opener wants 241 * the non-open direction 242 */ 243 if (flags & FREAD) { 244 /* open for read */ 245 if (devtype == SND_DEV_DSPREC) 246 rdch = pcm_chnalloc(d, PCMDIR_REC, td->td_proc->p_pid, PCMCHAN(i_dev)); 247 else 248 rdch = pcm_chnalloc(d, PCMDIR_REC, td->td_proc->p_pid, -1); 249 if (!rdch) { 250 /* no channel available, exit */ 251 pcm_unlock(d); 252 splx(s); 253 return EBUSY; 254 } 255 /* got a channel, already locked for us */ 256 if (chn_reset(rdch, fmt)) { 257 pcm_chnrelease(rdch); 258 i_dev->si_drv1 = NULL; 259 pcm_unlock(d); 260 splx(s); 261 return ENODEV; 262 } 263 264 if (flags & O_NONBLOCK) 265 rdch->flags |= CHN_F_NBIO; 266 pcm_chnref(rdch, 1); 267 CHN_UNLOCK(rdch); 268 rdref = 1; 269 /* 270 * Record channel created, ref'ed and unlocked 271 */ 272 } 273 274 if (flags & FWRITE) { 275 /* open for write */ 276 wrch = pcm_chnalloc(d, PCMDIR_PLAY, td->td_proc->p_pid, -1); 277 error = 0; 278 279 if (!wrch) 280 error = EBUSY; /* XXX Right return code? */ 281 else if (chn_reset(wrch, fmt)) 282 error = ENODEV; 283 284 if (error != 0) { 285 if (wrch) { 286 /* 287 * Free play channel 288 */ 289 pcm_chnrelease(wrch); 290 i_dev->si_drv2 = NULL; 291 } 292 if (rdref) { 293 /* 294 * Lock, deref and release previously created record channel 295 */ 296 CHN_LOCK(rdch); 297 pcm_chnref(rdch, -1); 298 pcm_chnrelease(rdch); 299 i_dev->si_drv1 = NULL; 300 } 301 302 pcm_unlock(d); 303 splx(s); 304 return error; 305 } 306 307 if (flags & O_NONBLOCK) 308 wrch->flags |= CHN_F_NBIO; 309 pcm_chnref(wrch, 1); 310 CHN_UNLOCK(wrch); 311 } 312 313 i_dev->si_drv1 = rdch; 314 i_dev->si_drv2 = wrch; 315 316 pcm_unlock(d); 317 splx(s); 318 return 0; 319 } 320 321 static int 322 dsp_close(dev_t i_dev, int flags, int mode, struct thread *td) 323 { 324 struct pcm_channel *rdch, *wrch; 325 struct snddev_info *d; 326 intrmask_t s; 327 int refs; 328 329 s = spltty(); 330 d = dsp_get_info(i_dev); 331 pcm_lock(d); 332 rdch = i_dev->si_drv1; 333 wrch = i_dev->si_drv2; 334 335 refs = 0; 336 337 if (rdch) { 338 CHN_LOCK(rdch); 339 refs += pcm_chnref(rdch, -1); 340 CHN_UNLOCK(rdch); 341 } 342 if (wrch) { 343 CHN_LOCK(wrch); 344 refs += pcm_chnref(wrch, -1); 345 CHN_UNLOCK(wrch); 346 } 347 348 /* 349 * If there are no more references, release the channels. 350 */ 351 if ((rdch || wrch) && refs == 0) { 352 353 if (pcm_getfakechan(d)) 354 pcm_getfakechan(d)->flags = 0; 355 356 i_dev->si_drv1 = NULL; 357 i_dev->si_drv2 = NULL; 358 359 dsp_set_flags(i_dev, dsp_get_flags(i_dev) & ~SD_F_TRANSIENT); 360 361 pcm_unlock(d); 362 363 if (rdch) { 364 CHN_LOCK(rdch); 365 chn_abort(rdch); /* won't sleep */ 366 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 367 chn_reset(rdch, 0); 368 pcm_chnrelease(rdch); 369 } 370 if (wrch) { 371 CHN_LOCK(wrch); 372 /* 373 * XXX: Maybe the right behaviour is to abort on non_block. 374 * It seems that mplayer flushes the audio queue by quickly 375 * closing and re-opening. In FBSD, there's a long pause 376 * while the audio queue flushes that I presume isn't there in 377 * linux. 378 */ 379 chn_flush(wrch); /* may sleep */ 380 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 381 chn_reset(wrch, 0); 382 pcm_chnrelease(wrch); 383 } 384 } else 385 pcm_unlock(d); 386 splx(s); 387 return 0; 388 } 389 390 static int 391 dsp_read(dev_t i_dev, struct uio *buf, int flag) 392 { 393 struct pcm_channel *rdch, *wrch; 394 intrmask_t s; 395 int ret; 396 397 s = spltty(); 398 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD); 399 400 KASSERT(rdch, ("dsp_read: nonexistant channel")); 401 KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel")); 402 403 if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { 404 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); 405 splx(s); 406 return EINVAL; 407 } 408 if (!(rdch->flags & CHN_F_RUNNING)) 409 rdch->flags |= CHN_F_RUNNING; 410 ret = chn_read(rdch, buf); 411 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); 412 413 splx(s); 414 return ret; 415 } 416 417 static int 418 dsp_write(dev_t i_dev, struct uio *buf, int flag) 419 { 420 struct pcm_channel *rdch, *wrch; 421 intrmask_t s; 422 int ret; 423 424 s = spltty(); 425 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_WR); 426 427 KASSERT(wrch, ("dsp_write: nonexistant channel")); 428 KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel")); 429 430 if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { 431 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); 432 splx(s); 433 return EINVAL; 434 } 435 if (!(wrch->flags & CHN_F_RUNNING)) 436 wrch->flags |= CHN_F_RUNNING; 437 ret = chn_write(wrch, buf); 438 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); 439 440 splx(s); 441 return ret; 442 } 443 444 static int 445 dsp_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td) 446 { 447 struct pcm_channel *wrch, *rdch; 448 struct snddev_info *d; 449 intrmask_t s; 450 int kill; 451 int ret = 0, *arg_i = (int *)arg, tmp; 452 453 /* 454 * this is an evil hack to allow broken apps to perform mixer ioctls 455 * on dsp devices. 456 */ 457 458 if (IOCGROUP(cmd) == 'M') { 459 dev_t pdev; 460 461 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0)); 462 return mixer_ioctl(pdev, cmd, arg, mode, td); 463 } 464 465 s = spltty(); 466 d = dsp_get_info(i_dev); 467 getchns(i_dev, &rdch, &wrch, 0); 468 469 kill = 0; 470 if (wrch && (wrch->flags & CHN_F_DEAD)) 471 kill |= 1; 472 if (rdch && (rdch->flags & CHN_F_DEAD)) 473 kill |= 2; 474 if (kill == 3) { 475 relchns(i_dev, rdch, wrch, 0); 476 splx(s); 477 return EINVAL; 478 } 479 if (kill & 1) 480 wrch = NULL; 481 if (kill & 2) 482 rdch = NULL; 483 484 switch(cmd) { 485 #ifdef OLDPCM_IOCTL 486 /* 487 * we start with the new ioctl interface. 488 */ 489 case AIONWRITE: /* how many bytes can write ? */ 490 /* 491 if (wrch && wrch->bufhard.dl) 492 while (chn_wrfeed(wrch) == 0); 493 */ 494 *arg_i = wrch? sndbuf_getfree(wrch->bufsoft) : 0; 495 break; 496 497 case AIOSSIZE: /* set the current blocksize */ 498 { 499 struct snd_size *p = (struct snd_size *)arg; 500 501 p->play_size = 0; 502 p->rec_size = 0; 503 if (wrch) { 504 CHN_LOCK(wrch); 505 chn_setblocksize(wrch, 2, p->play_size); 506 p->play_size = sndbuf_getblksz(wrch->bufsoft); 507 CHN_UNLOCK(wrch); 508 } 509 if (rdch) { 510 CHN_LOCK(rdch); 511 chn_setblocksize(rdch, 2, p->rec_size); 512 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 513 CHN_UNLOCK(rdch); 514 } 515 } 516 break; 517 case AIOGSIZE: /* get the current blocksize */ 518 { 519 struct snd_size *p = (struct snd_size *)arg; 520 521 if (wrch) 522 p->play_size = sndbuf_getblksz(wrch->bufsoft); 523 if (rdch) 524 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 525 } 526 break; 527 528 case AIOSFMT: 529 { 530 snd_chan_param *p = (snd_chan_param *)arg; 531 532 if (wrch) { 533 CHN_LOCK(wrch); 534 chn_setformat(wrch, p->play_format); 535 chn_setspeed(wrch, p->play_rate); 536 CHN_UNLOCK(wrch); 537 } 538 if (rdch) { 539 CHN_LOCK(rdch); 540 chn_setformat(rdch, p->rec_format); 541 chn_setspeed(rdch, p->rec_rate); 542 CHN_UNLOCK(rdch); 543 } 544 } 545 /* FALLTHROUGH */ 546 547 case AIOGFMT: 548 { 549 snd_chan_param *p = (snd_chan_param *)arg; 550 551 p->play_rate = wrch? wrch->speed : 0; 552 p->rec_rate = rdch? rdch->speed : 0; 553 p->play_format = wrch? wrch->format : 0; 554 p->rec_format = rdch? rdch->format : 0; 555 } 556 break; 557 558 case AIOGCAP: /* get capabilities */ 559 { 560 snd_capabilities *p = (snd_capabilities *)arg; 561 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL; 562 dev_t pdev; 563 564 if (rdch) { 565 CHN_LOCK(rdch); 566 rcaps = chn_getcaps(rdch); 567 } 568 if (wrch) { 569 CHN_LOCK(wrch); 570 pcaps = chn_getcaps(wrch); 571 } 572 p->rate_min = max(rcaps? rcaps->minspeed : 0, 573 pcaps? pcaps->minspeed : 0); 574 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 575 pcaps? pcaps->maxspeed : 1000000); 576 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000, 577 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000); 578 /* XXX bad on sb16 */ 579 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & 580 (wrch? chn_getformats(wrch) : 0xffffffff); 581 if (rdch && wrch) 582 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; 583 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(PCMUNIT(i_dev), SND_DEV_CTL, 0)); 584 p->mixers = 1; /* default: one mixer */ 585 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0; 586 p->left = p->right = 100; 587 if (wrch) 588 CHN_UNLOCK(wrch); 589 if (rdch) 590 CHN_UNLOCK(rdch); 591 } 592 break; 593 594 case AIOSTOP: 595 if (*arg_i == AIOSYNC_PLAY && wrch) 596 *arg_i = chn_abort(wrch); 597 else if (*arg_i == AIOSYNC_CAPTURE && rdch) 598 *arg_i = chn_abort(rdch); 599 else { 600 printf("AIOSTOP: bad channel 0x%x\n", *arg_i); 601 *arg_i = 0; 602 } 603 break; 604 605 case AIOSYNC: 606 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", 607 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); 608 break; 609 #endif 610 /* 611 * here follow the standard ioctls (filio.h etc.) 612 */ 613 case FIONREAD: /* get # bytes to read */ 614 /* if (rdch && rdch->bufhard.dl) 615 while (chn_rdfeed(rdch) == 0); 616 */ *arg_i = rdch? sndbuf_getready(rdch->bufsoft) : 0; 617 break; 618 619 case FIOASYNC: /*set/clear async i/o */ 620 DEB( printf("FIOASYNC\n") ; ) 621 break; 622 623 case SNDCTL_DSP_NONBLOCK: 624 case FIONBIO: /* set/clear non-blocking i/o */ 625 if (rdch) 626 rdch->flags &= ~CHN_F_NBIO; 627 if (wrch) 628 wrch->flags &= ~CHN_F_NBIO; 629 if (*arg_i) { 630 if (rdch) 631 rdch->flags |= CHN_F_NBIO; 632 if (wrch) 633 wrch->flags |= CHN_F_NBIO; 634 } 635 break; 636 637 /* 638 * Finally, here is the linux-compatible ioctl interface 639 */ 640 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) 641 case THE_REAL_SNDCTL_DSP_GETBLKSIZE: 642 case SNDCTL_DSP_GETBLKSIZE: 643 if (wrch) 644 *arg_i = sndbuf_getblksz(wrch->bufsoft); 645 else if (rdch) 646 *arg_i = sndbuf_getblksz(rdch->bufsoft); 647 else 648 *arg_i = 0; 649 break ; 650 651 case SNDCTL_DSP_SETBLKSIZE: 652 RANGE(*arg_i, 16, 65536); 653 if (wrch) { 654 CHN_LOCK(wrch); 655 chn_setblocksize(wrch, 2, *arg_i); 656 CHN_UNLOCK(wrch); 657 } 658 if (rdch) { 659 CHN_LOCK(rdch); 660 chn_setblocksize(rdch, 2, *arg_i); 661 CHN_UNLOCK(rdch); 662 } 663 break; 664 665 case SNDCTL_DSP_RESET: 666 DEB(printf("dsp reset\n")); 667 if (wrch) 668 chn_abort(wrch); 669 if (rdch) 670 chn_abort(rdch); 671 break; 672 673 case SNDCTL_DSP_SYNC: 674 DEB(printf("dsp sync\n")); 675 /* chn_sync may sleep */ 676 if (wrch) { 677 CHN_LOCK(wrch); 678 chn_sync(wrch, sndbuf_getsize(wrch->bufsoft) - 4); 679 CHN_UNLOCK(wrch); 680 } 681 break; 682 683 case SNDCTL_DSP_SPEED: 684 /* chn_setspeed may sleep */ 685 tmp = 0; 686 if (wrch) { 687 CHN_LOCK(wrch); 688 ret = chn_setspeed(wrch, *arg_i); 689 tmp = wrch->speed; 690 CHN_UNLOCK(wrch); 691 } 692 if (rdch && ret == 0) { 693 CHN_LOCK(rdch); 694 ret = chn_setspeed(rdch, *arg_i); 695 if (tmp == 0) 696 tmp = rdch->speed; 697 CHN_UNLOCK(rdch); 698 } 699 *arg_i = tmp; 700 break; 701 702 case SOUND_PCM_READ_RATE: 703 *arg_i = wrch? wrch->speed : rdch->speed; 704 break; 705 706 case SNDCTL_DSP_STEREO: 707 tmp = -1; 708 *arg_i = (*arg_i)? AFMT_STEREO : 0; 709 if (wrch) { 710 CHN_LOCK(wrch); 711 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 712 tmp = (wrch->format & AFMT_STEREO)? 1 : 0; 713 CHN_UNLOCK(wrch); 714 } 715 if (rdch && ret == 0) { 716 CHN_LOCK(rdch); 717 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 718 if (tmp == -1) 719 tmp = (rdch->format & AFMT_STEREO)? 1 : 0; 720 CHN_UNLOCK(rdch); 721 } 722 *arg_i = tmp; 723 break; 724 725 case SOUND_PCM_WRITE_CHANNELS: 726 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 727 if (*arg_i != 0) { 728 tmp = 0; 729 *arg_i = (*arg_i != 1)? AFMT_STEREO : 0; 730 if (wrch) { 731 CHN_LOCK(wrch); 732 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 733 tmp = (wrch->format & AFMT_STEREO)? 2 : 1; 734 CHN_UNLOCK(wrch); 735 } 736 if (rdch && ret == 0) { 737 CHN_LOCK(rdch); 738 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 739 if (tmp == 0) 740 tmp = (rdch->format & AFMT_STEREO)? 2 : 1; 741 CHN_UNLOCK(rdch); 742 } 743 *arg_i = tmp; 744 } else { 745 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; 746 } 747 break; 748 749 case SOUND_PCM_READ_CHANNELS: 750 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; 751 break; 752 753 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 754 *arg_i = wrch? chn_getformats(wrch) : chn_getformats(rdch); 755 break ; 756 757 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 758 /* XXX locking */ 759 if ((*arg_i != AFMT_QUERY)) { 760 tmp = 0; 761 if (wrch) { 762 CHN_LOCK(wrch); 763 ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO)); 764 tmp = wrch->format & ~AFMT_STEREO; 765 CHN_UNLOCK(wrch); 766 } 767 if (rdch && ret == 0) { 768 CHN_LOCK(rdch); 769 ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO)); 770 if (tmp == 0) 771 tmp = rdch->format & ~AFMT_STEREO; 772 CHN_UNLOCK(rdch); 773 } 774 *arg_i = tmp; 775 } else 776 *arg_i = (wrch? wrch->format : rdch->format) & ~AFMT_STEREO; 777 break; 778 779 case SNDCTL_DSP_SETFRAGMENT: 780 /* XXX locking */ 781 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 782 { 783 u_int32_t fragln = (*arg_i) & 0x0000ffff; 784 u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 785 u_int32_t fragsz; 786 787 RANGE(fragln, 4, 16); 788 fragsz = 1 << fragln; 789 790 if (maxfrags == 0) 791 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 792 if (maxfrags < 2) 793 maxfrags = 2; 794 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 795 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 796 797 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 798 if (rdch) { 799 CHN_LOCK(rdch); 800 ret = chn_setblocksize(rdch, maxfrags, fragsz); 801 maxfrags = sndbuf_getblkcnt(rdch->bufsoft); 802 fragsz = sndbuf_getblksz(rdch->bufsoft); 803 CHN_UNLOCK(rdch); 804 } 805 if (wrch && ret == 0) { 806 CHN_LOCK(wrch); 807 ret = chn_setblocksize(wrch, maxfrags, fragsz); 808 maxfrags = sndbuf_getblkcnt(wrch->bufsoft); 809 fragsz = sndbuf_getblksz(wrch->bufsoft); 810 CHN_UNLOCK(wrch); 811 } 812 813 fragln = 0; 814 while (fragsz > 1) { 815 fragln++; 816 fragsz >>= 1; 817 } 818 *arg_i = (maxfrags << 16) | fragln; 819 } 820 break; 821 822 case SNDCTL_DSP_GETISPACE: 823 /* return the size of data available in the input queue */ 824 { 825 audio_buf_info *a = (audio_buf_info *)arg; 826 if (rdch) { 827 struct snd_dbuf *bs = rdch->bufsoft; 828 829 CHN_LOCK(rdch); 830 a->bytes = sndbuf_getready(bs); 831 a->fragments = a->bytes / sndbuf_getblksz(bs); 832 a->fragstotal = sndbuf_getblkcnt(bs); 833 a->fragsize = sndbuf_getblksz(bs); 834 CHN_UNLOCK(rdch); 835 } 836 } 837 break; 838 839 case SNDCTL_DSP_GETOSPACE: 840 /* return space available in the output queue */ 841 { 842 audio_buf_info *a = (audio_buf_info *)arg; 843 if (wrch) { 844 struct snd_dbuf *bs = wrch->bufsoft; 845 846 CHN_LOCK(wrch); 847 chn_wrupdate(wrch); 848 a->bytes = sndbuf_getfree(bs); 849 a->fragments = a->bytes / sndbuf_getblksz(bs); 850 a->fragstotal = sndbuf_getblkcnt(bs); 851 a->fragsize = sndbuf_getblksz(bs); 852 CHN_UNLOCK(wrch); 853 } 854 } 855 break; 856 857 case SNDCTL_DSP_GETIPTR: 858 { 859 count_info *a = (count_info *)arg; 860 if (rdch) { 861 struct snd_dbuf *bs = rdch->bufsoft; 862 863 CHN_LOCK(rdch); 864 chn_rdupdate(rdch); 865 a->bytes = sndbuf_gettotal(bs); 866 a->blocks = sndbuf_getblocks(bs) - rdch->blocks; 867 a->ptr = sndbuf_getreadyptr(bs); 868 rdch->blocks = sndbuf_getblocks(bs); 869 CHN_UNLOCK(rdch); 870 } else 871 ret = EINVAL; 872 } 873 break; 874 875 case SNDCTL_DSP_GETOPTR: 876 { 877 count_info *a = (count_info *)arg; 878 if (wrch) { 879 struct snd_dbuf *bs = wrch->bufsoft; 880 881 CHN_LOCK(wrch); 882 chn_wrupdate(wrch); 883 a->bytes = sndbuf_gettotal(bs); 884 a->blocks = sndbuf_getblocks(bs) - wrch->blocks; 885 a->ptr = sndbuf_getreadyptr(bs); 886 wrch->blocks = sndbuf_getblocks(bs); 887 CHN_UNLOCK(wrch); 888 } else 889 ret = EINVAL; 890 } 891 break; 892 893 case SNDCTL_DSP_GETCAPS: 894 *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER; 895 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 896 *arg_i |= DSP_CAP_DUPLEX; 897 break; 898 899 case SOUND_PCM_READ_BITS: 900 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_16BIT)? 16 : 8; 901 break; 902 903 case SNDCTL_DSP_SETTRIGGER: 904 if (rdch) { 905 CHN_LOCK(rdch); 906 rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 907 if (*arg_i & PCM_ENABLE_INPUT) 908 chn_start(rdch, 1); 909 else 910 rdch->flags |= CHN_F_NOTRIGGER; 911 CHN_UNLOCK(rdch); 912 } 913 if (wrch) { 914 CHN_LOCK(wrch); 915 wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 916 if (*arg_i & PCM_ENABLE_OUTPUT) 917 chn_start(wrch, 1); 918 else 919 wrch->flags |= CHN_F_NOTRIGGER; 920 CHN_UNLOCK(wrch); 921 } 922 break; 923 924 case SNDCTL_DSP_GETTRIGGER: 925 *arg_i = 0; 926 if (wrch && wrch->flags & CHN_F_TRIGGERED) 927 *arg_i |= PCM_ENABLE_OUTPUT; 928 if (rdch && rdch->flags & CHN_F_TRIGGERED) 929 *arg_i |= PCM_ENABLE_INPUT; 930 break; 931 932 case SNDCTL_DSP_GETODELAY: 933 if (wrch) { 934 struct snd_dbuf *b = wrch->bufhard; 935 struct snd_dbuf *bs = wrch->bufsoft; 936 937 CHN_LOCK(wrch); 938 chn_wrupdate(wrch); 939 *arg_i = sndbuf_getready(b) + sndbuf_getready(bs); 940 CHN_UNLOCK(wrch); 941 } else 942 ret = EINVAL; 943 break; 944 945 case SNDCTL_DSP_POST: 946 if (wrch) { 947 CHN_LOCK(wrch); 948 wrch->flags &= ~CHN_F_NOTRIGGER; 949 chn_start(wrch, 1); 950 CHN_UNLOCK(wrch); 951 } 952 break; 953 954 case SNDCTL_DSP_MAPINBUF: 955 case SNDCTL_DSP_MAPOUTBUF: 956 case SNDCTL_DSP_SETSYNCRO: 957 /* undocumented */ 958 959 case SNDCTL_DSP_SUBDIVIDE: 960 case SOUND_PCM_WRITE_FILTER: 961 case SOUND_PCM_READ_FILTER: 962 /* dunno what these do, don't sound important */ 963 default: 964 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd)); 965 ret = EINVAL; 966 break; 967 } 968 relchns(i_dev, rdch, wrch, 0); 969 splx(s); 970 return ret; 971 } 972 973 static int 974 dsp_poll(dev_t i_dev, int events, struct thread *td) 975 { 976 struct pcm_channel *wrch = NULL, *rdch = NULL; 977 intrmask_t s; 978 int ret, e; 979 980 s = spltty(); 981 ret = 0; 982 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 983 984 if (wrch) { 985 e = (events & (POLLOUT | POLLWRNORM)); 986 if (e) 987 ret |= chn_poll(wrch, e, td); 988 } 989 if (rdch) { 990 e = (events & (POLLIN | POLLRDNORM)); 991 if (e) 992 ret |= chn_poll(rdch, e, td); 993 } 994 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 995 996 splx(s); 997 return ret; 998 } 999 1000 static int 1001 dsp_mmap(dev_t i_dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot) 1002 { 1003 struct pcm_channel *wrch = NULL, *rdch = NULL, *c; 1004 intrmask_t s; 1005 1006 if (nprot & PROT_EXEC) 1007 return -1; 1008 1009 s = spltty(); 1010 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1011 #if 0 1012 /* 1013 * XXX the linux api uses the nprot to select read/write buffer 1014 * our vm system doesn't allow this, so force write buffer 1015 */ 1016 1017 if (wrch && (nprot & PROT_WRITE)) { 1018 c = wrch; 1019 } else if (rdch && (nprot & PROT_READ)) { 1020 c = rdch; 1021 } else { 1022 splx(s); 1023 return -1; 1024 } 1025 #else 1026 c = wrch; 1027 #endif 1028 1029 if (c == NULL) { 1030 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1031 splx(s); 1032 return -1; 1033 } 1034 1035 if (offset >= sndbuf_getsize(c->bufsoft)) { 1036 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1037 splx(s); 1038 return -1; 1039 } 1040 1041 if (!(c->flags & CHN_F_MAPPED)) 1042 c->flags |= CHN_F_MAPPED; 1043 1044 *paddr = vtophys(sndbuf_getbufofs(c->bufsoft, offset)); 1045 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1046 1047 splx(s); 1048 return 0; 1049 } 1050 1051 int 1052 dsp_register(int unit, int channel) 1053 { 1054 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP, channel), 1055 UID_ROOT, GID_WHEEL, 0666, "dsp%d.%d", unit, channel); 1056 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSP16, channel), 1057 UID_ROOT, GID_WHEEL, 0666, "dspW%d.%d", unit, channel); 1058 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_AUDIO, channel), 1059 UID_ROOT, GID_WHEEL, 0666, "audio%d.%d", unit, channel); 1060 1061 return 0; 1062 } 1063 1064 int 1065 dsp_registerrec(int unit, int channel) 1066 { 1067 make_dev(&dsp_cdevsw, PCMMKMINOR(unit, SND_DEV_DSPREC, channel), 1068 UID_ROOT, GID_WHEEL, 0666, "dspr%d.%d", unit, channel); 1069 1070 return 0; 1071 } 1072 1073 int 1074 dsp_unregister(int unit, int channel) 1075 { 1076 dev_t pdev; 1077 1078 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSP, channel)); 1079 destroy_dev(pdev); 1080 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSP16, channel)); 1081 destroy_dev(pdev); 1082 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_AUDIO, channel)); 1083 destroy_dev(pdev); 1084 1085 return 0; 1086 } 1087 1088 int 1089 dsp_unregisterrec(int unit, int channel) 1090 { 1091 dev_t pdev; 1092 1093 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_DSPREC, channel)); 1094 destroy_dev(pdev); 1095 1096 return 0; 1097 } 1098 1099 #ifdef USING_DEVFS 1100 static void 1101 dsp_clone(void *arg, char *name, int namelen, dev_t *dev) 1102 { 1103 dev_t pdev; 1104 int i, cont, unit, devtype; 1105 int devtypes[3] = {SND_DEV_DSP, SND_DEV_DSP16, SND_DEV_AUDIO}; 1106 char *devnames[3] = {"dsp", "dspW", "audio"}; 1107 1108 if (*dev != NODEV) 1109 return; 1110 if (pcm_devclass == NULL) 1111 return; 1112 1113 devtype = 0; 1114 unit = -1; 1115 for (i = 0; (i < 3) && (unit == -1); i++) { 1116 devtype = devtypes[i]; 1117 if (strcmp(name, devnames[i]) == 0) { 1118 unit = snd_unit; 1119 } else { 1120 if (dev_stdclone(name, NULL, devnames[i], &unit) != 1) 1121 unit = -1; 1122 } 1123 } 1124 if (unit == -1 || unit >= devclass_get_maxunit(pcm_devclass)) 1125 return; 1126 1127 cont = 1; 1128 for (i = 0; cont; i++) { 1129 pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, devtype, i)); 1130 if (pdev->si_flags & SI_NAMED) { 1131 if ((pdev->si_drv1 == NULL) && (pdev->si_drv2 == NULL)) { 1132 *dev = pdev; 1133 return; 1134 } 1135 } else { 1136 cont = 0; 1137 } 1138 } 1139 } 1140 1141 static void 1142 dsp_sysinit(void *p) 1143 { 1144 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000); 1145 } 1146 1147 static void 1148 dsp_sysuninit(void *p) 1149 { 1150 if (dsp_ehtag != NULL) 1151 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag); 1152 } 1153 1154 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL); 1155 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL); 1156 #endif 1157 1158
Cache object: e93f4d8961090a8829b78a5c0b66957f
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