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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/6.0/sys/dev/sound/pcm/dsp.c 149038 2005-08-13 21:24:18Z rwatson $"); 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 struct cdevsw dsp_cdevsw = { 45 .d_version = D_VERSION, 46 .d_flags = D_NEEDGIANT, 47 .d_open = dsp_open, 48 .d_close = dsp_close, 49 .d_read = dsp_read, 50 .d_write = dsp_write, 51 .d_ioctl = dsp_ioctl, 52 .d_poll = dsp_poll, 53 .d_mmap = dsp_mmap, 54 .d_name = "dsp", 55 }; 56 57 #ifdef USING_DEVFS 58 static eventhandler_tag dsp_ehtag; 59 #endif 60 61 static struct snddev_info * 62 dsp_get_info(struct cdev *dev) 63 { 64 struct snddev_info *d; 65 int unit; 66 67 unit = PCMUNIT(dev); 68 if (unit >= devclass_get_maxunit(pcm_devclass)) 69 return NULL; 70 d = devclass_get_softc(pcm_devclass, unit); 71 72 return d; 73 } 74 75 static u_int32_t 76 dsp_get_flags(struct cdev *dev) 77 { 78 device_t bdev; 79 int unit; 80 81 unit = PCMUNIT(dev); 82 if (unit >= devclass_get_maxunit(pcm_devclass)) 83 return 0xffffffff; 84 bdev = devclass_get_device(pcm_devclass, unit); 85 86 return pcm_getflags(bdev); 87 } 88 89 static void 90 dsp_set_flags(struct cdev *dev, u_int32_t flags) 91 { 92 device_t bdev; 93 int unit; 94 95 unit = PCMUNIT(dev); 96 if (unit >= devclass_get_maxunit(pcm_devclass)) 97 return; 98 bdev = devclass_get_device(pcm_devclass, unit); 99 100 pcm_setflags(bdev, flags); 101 } 102 103 /* 104 * return the channels channels associated with an open device instance. 105 * set the priority if the device is simplex and one direction (only) is 106 * specified. 107 * lock channels specified. 108 */ 109 static int 110 getchns(struct cdev *dev, struct pcm_channel **rdch, struct pcm_channel **wrch, u_int32_t prio) 111 { 112 struct snddev_info *d; 113 u_int32_t flags; 114 115 flags = dsp_get_flags(dev); 116 d = dsp_get_info(dev); 117 pcm_inprog(d, 1); 118 pcm_lock(d); 119 KASSERT((flags & SD_F_PRIO_SET) != SD_F_PRIO_SET, \ 120 ("getchns: read and write both prioritised")); 121 122 if ((flags & SD_F_PRIO_SET) == 0 && (prio != (SD_F_PRIO_RD | SD_F_PRIO_WR))) { 123 flags |= prio & (SD_F_PRIO_RD | SD_F_PRIO_WR); 124 dsp_set_flags(dev, flags); 125 } 126 127 *rdch = dev->si_drv1; 128 *wrch = dev->si_drv2; 129 if ((flags & SD_F_SIMPLEX) && (flags & SD_F_PRIO_SET)) { 130 if (prio) { 131 if (*rdch && flags & SD_F_PRIO_WR) { 132 dev->si_drv1 = NULL; 133 *rdch = pcm_getfakechan(d); 134 } else if (*wrch && flags & SD_F_PRIO_RD) { 135 dev->si_drv2 = NULL; 136 *wrch = pcm_getfakechan(d); 137 } 138 } 139 140 pcm_getfakechan(d)->flags |= CHN_F_BUSY; 141 } 142 pcm_unlock(d); 143 144 if (*rdch && *rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD)) 145 CHN_LOCK(*rdch); 146 if (*wrch && *wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR)) 147 CHN_LOCK(*wrch); 148 149 return 0; 150 } 151 152 /* unlock specified channels */ 153 static void 154 relchns(struct cdev *dev, struct pcm_channel *rdch, struct pcm_channel *wrch, u_int32_t prio) 155 { 156 struct snddev_info *d; 157 158 d = dsp_get_info(dev); 159 if (wrch && wrch != pcm_getfakechan(d) && (prio & SD_F_PRIO_WR)) 160 CHN_UNLOCK(wrch); 161 if (rdch && rdch != pcm_getfakechan(d) && (prio & SD_F_PRIO_RD)) 162 CHN_UNLOCK(rdch); 163 pcm_inprog(d, -1); 164 } 165 166 static int 167 dsp_open(struct cdev *i_dev, int flags, int mode, struct thread *td) 168 { 169 struct pcm_channel *rdch, *wrch; 170 struct snddev_info *d; 171 intrmask_t s; 172 u_int32_t fmt; 173 int devtype; 174 int rdref; 175 int error; 176 177 s = spltty(); 178 d = dsp_get_info(i_dev); 179 devtype = PCMDEV(i_dev); 180 181 /* decide default format */ 182 switch (devtype) { 183 case SND_DEV_DSP16: 184 fmt = AFMT_S16_LE; 185 break; 186 187 case SND_DEV_DSP: 188 fmt = AFMT_U8; 189 break; 190 191 case SND_DEV_AUDIO: 192 fmt = AFMT_MU_LAW; 193 break; 194 195 case SND_DEV_NORESET: 196 fmt = 0; 197 break; 198 199 case SND_DEV_DSPREC: 200 fmt = AFMT_U8; 201 if (mode & FWRITE) { 202 splx(s); 203 return EINVAL; 204 } 205 break; 206 207 default: 208 panic("impossible devtype %d", devtype); 209 } 210 211 rdref = 0; 212 213 /* lock snddev so nobody else can monkey with it */ 214 pcm_lock(d); 215 216 rdch = i_dev->si_drv1; 217 wrch = i_dev->si_drv2; 218 219 if ((dsp_get_flags(i_dev) & SD_F_SIMPLEX) && (rdch || wrch)) { 220 /* we're a simplex device and already open, no go */ 221 pcm_unlock(d); 222 splx(s); 223 return EBUSY; 224 } 225 226 if (((flags & FREAD) && rdch) || ((flags & FWRITE) && wrch)) { 227 /* 228 * device already open in one or both directions that 229 * the opener wants; we can't handle this. 230 */ 231 pcm_unlock(d); 232 splx(s); 233 return EBUSY; 234 } 235 236 /* 237 * if we get here, the open request is valid- either: 238 * * we were previously not open 239 * * we were open for play xor record and the opener wants 240 * the non-open direction 241 */ 242 if (flags & FREAD) { 243 /* open for read */ 244 if (devtype == SND_DEV_DSPREC) 245 rdch = pcm_chnalloc(d, PCMDIR_REC, td->td_proc->p_pid, PCMCHAN(i_dev)); 246 else 247 rdch = pcm_chnalloc(d, PCMDIR_REC, td->td_proc->p_pid, -1); 248 if (!rdch) { 249 /* no channel available, exit */ 250 pcm_unlock(d); 251 splx(s); 252 return EBUSY; 253 } 254 /* got a channel, already locked for us */ 255 if (chn_reset(rdch, fmt)) { 256 pcm_chnrelease(rdch); 257 i_dev->si_drv1 = NULL; 258 pcm_unlock(d); 259 splx(s); 260 return ENODEV; 261 } 262 263 if (flags & O_NONBLOCK) 264 rdch->flags |= CHN_F_NBIO; 265 pcm_chnref(rdch, 1); 266 CHN_UNLOCK(rdch); 267 rdref = 1; 268 /* 269 * Record channel created, ref'ed and unlocked 270 */ 271 } 272 273 if (flags & FWRITE) { 274 /* open for write */ 275 wrch = pcm_chnalloc(d, PCMDIR_PLAY, td->td_proc->p_pid, -1); 276 error = 0; 277 278 if (!wrch) 279 error = EBUSY; /* XXX Right return code? */ 280 else if (chn_reset(wrch, fmt)) 281 error = ENODEV; 282 283 if (error != 0) { 284 if (wrch) { 285 /* 286 * Free play channel 287 */ 288 pcm_chnrelease(wrch); 289 i_dev->si_drv2 = NULL; 290 } 291 if (rdref) { 292 /* 293 * Lock, deref and release previously created record channel 294 */ 295 CHN_LOCK(rdch); 296 pcm_chnref(rdch, -1); 297 pcm_chnrelease(rdch); 298 i_dev->si_drv1 = NULL; 299 } 300 301 pcm_unlock(d); 302 splx(s); 303 return error; 304 } 305 306 if (flags & O_NONBLOCK) 307 wrch->flags |= CHN_F_NBIO; 308 pcm_chnref(wrch, 1); 309 CHN_UNLOCK(wrch); 310 } 311 312 i_dev->si_drv1 = rdch; 313 i_dev->si_drv2 = wrch; 314 315 pcm_unlock(d); 316 splx(s); 317 return 0; 318 } 319 320 static int 321 dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td) 322 { 323 struct pcm_channel *rdch, *wrch; 324 struct snddev_info *d; 325 intrmask_t s; 326 int refs; 327 328 s = spltty(); 329 d = dsp_get_info(i_dev); 330 pcm_lock(d); 331 rdch = i_dev->si_drv1; 332 wrch = i_dev->si_drv2; 333 334 refs = 0; 335 336 if (rdch) { 337 CHN_LOCK(rdch); 338 refs += pcm_chnref(rdch, -1); 339 CHN_UNLOCK(rdch); 340 } 341 if (wrch) { 342 CHN_LOCK(wrch); 343 refs += pcm_chnref(wrch, -1); 344 CHN_UNLOCK(wrch); 345 } 346 347 /* 348 * If there are no more references, release the channels. 349 */ 350 if ((rdch || wrch) && refs == 0) { 351 352 if (pcm_getfakechan(d)) 353 pcm_getfakechan(d)->flags = 0; 354 355 i_dev->si_drv1 = NULL; 356 i_dev->si_drv2 = NULL; 357 358 dsp_set_flags(i_dev, dsp_get_flags(i_dev) & ~SD_F_TRANSIENT); 359 360 pcm_unlock(d); 361 362 if (rdch) { 363 CHN_LOCK(rdch); 364 chn_abort(rdch); /* won't sleep */ 365 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 366 chn_reset(rdch, 0); 367 pcm_chnrelease(rdch); 368 } 369 if (wrch) { 370 CHN_LOCK(wrch); 371 /* 372 * XXX: Maybe the right behaviour is to abort on non_block. 373 * It seems that mplayer flushes the audio queue by quickly 374 * closing and re-opening. In FBSD, there's a long pause 375 * while the audio queue flushes that I presume isn't there in 376 * linux. 377 */ 378 chn_flush(wrch); /* may sleep */ 379 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 380 chn_reset(wrch, 0); 381 pcm_chnrelease(wrch); 382 } 383 } else 384 pcm_unlock(d); 385 splx(s); 386 return 0; 387 } 388 389 static int 390 dsp_read(struct cdev *i_dev, struct uio *buf, int flag) 391 { 392 struct pcm_channel *rdch, *wrch; 393 intrmask_t s; 394 int ret; 395 396 s = spltty(); 397 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD); 398 399 KASSERT(rdch, ("dsp_read: nonexistant channel")); 400 KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel")); 401 402 if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { 403 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); 404 splx(s); 405 return EINVAL; 406 } 407 if (!(rdch->flags & CHN_F_RUNNING)) 408 rdch->flags |= CHN_F_RUNNING; 409 ret = chn_read(rdch, buf); 410 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); 411 412 splx(s); 413 return ret; 414 } 415 416 static int 417 dsp_write(struct cdev *i_dev, struct uio *buf, int flag) 418 { 419 struct pcm_channel *rdch, *wrch; 420 intrmask_t s; 421 int ret; 422 423 s = spltty(); 424 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_WR); 425 426 KASSERT(wrch, ("dsp_write: nonexistant channel")); 427 KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel")); 428 429 if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { 430 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); 431 splx(s); 432 return EINVAL; 433 } 434 if (!(wrch->flags & CHN_F_RUNNING)) 435 wrch->flags |= CHN_F_RUNNING; 436 ret = chn_write(wrch, buf); 437 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); 438 439 splx(s); 440 return ret; 441 } 442 443 static int 444 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td) 445 { 446 struct pcm_channel *chn, *rdch, *wrch; 447 struct snddev_info *d; 448 intrmask_t s; 449 int kill; 450 int ret = 0, *arg_i = (int *)arg, tmp; 451 452 /* 453 * this is an evil hack to allow broken apps to perform mixer ioctls 454 * on dsp devices. 455 */ 456 457 d = dsp_get_info(i_dev); 458 if (IOCGROUP(cmd) == 'M') 459 return mixer_ioctl(d->mixer_dev, cmd, arg, mode, td); 460 461 s = spltty(); 462 getchns(i_dev, &rdch, &wrch, 0); 463 464 kill = 0; 465 if (wrch && (wrch->flags & CHN_F_DEAD)) 466 kill |= 1; 467 if (rdch && (rdch->flags & CHN_F_DEAD)) 468 kill |= 2; 469 if (kill == 3) { 470 relchns(i_dev, rdch, wrch, 0); 471 splx(s); 472 return EINVAL; 473 } 474 if (kill & 1) 475 wrch = NULL; 476 if (kill & 2) 477 rdch = NULL; 478 479 switch(cmd) { 480 #ifdef OLDPCM_IOCTL 481 /* 482 * we start with the new ioctl interface. 483 */ 484 case AIONWRITE: /* how many bytes can write ? */ 485 CHN_LOCK(wrch); 486 /* 487 if (wrch && wrch->bufhard.dl) 488 while (chn_wrfeed(wrch) == 0); 489 */ 490 *arg_i = wrch? sndbuf_getfree(wrch->bufsoft) : 0; 491 CHN_UNLOCK(wrch); 492 break; 493 494 case AIOSSIZE: /* set the current blocksize */ 495 { 496 struct snd_size *p = (struct snd_size *)arg; 497 498 p->play_size = 0; 499 p->rec_size = 0; 500 if (wrch) { 501 CHN_LOCK(wrch); 502 chn_setblocksize(wrch, 2, p->play_size); 503 p->play_size = sndbuf_getblksz(wrch->bufsoft); 504 CHN_UNLOCK(wrch); 505 } 506 if (rdch) { 507 CHN_LOCK(rdch); 508 chn_setblocksize(rdch, 2, p->rec_size); 509 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 510 CHN_UNLOCK(rdch); 511 } 512 } 513 break; 514 case AIOGSIZE: /* get the current blocksize */ 515 { 516 struct snd_size *p = (struct snd_size *)arg; 517 518 if (wrch) { 519 CHN_LOCK(wrch); 520 p->play_size = sndbuf_getblksz(wrch->bufsoft); 521 CHN_UNLOCK(wrch); 522 } 523 if (rdch) { 524 CHN_LOCK(rdch); 525 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 526 CHN_UNLOCK(rdch); 527 } 528 } 529 break; 530 531 case AIOSFMT: 532 case AIOGFMT: 533 { 534 snd_chan_param *p = (snd_chan_param *)arg; 535 536 if (wrch) { 537 CHN_LOCK(wrch); 538 if (cmd == AIOSFMT) { 539 chn_setformat(wrch, p->play_format); 540 chn_setspeed(wrch, p->play_rate); 541 } 542 p->play_rate = wrch->speed; 543 p->play_format = wrch->format; 544 CHN_UNLOCK(wrch); 545 } else { 546 p->play_rate = 0; 547 p->play_format = 0; 548 } 549 if (rdch) { 550 CHN_LOCK(rdch); 551 if (cmd == AIOSFMT) { 552 chn_setformat(rdch, p->rec_format); 553 chn_setspeed(rdch, p->rec_rate); 554 } 555 p->rec_rate = rdch->speed; 556 p->rec_format = rdch->format; 557 CHN_UNLOCK(rdch); 558 } else { 559 p->rec_rate = 0; 560 p->rec_format = 0; 561 } 562 } 563 break; 564 565 case AIOGCAP: /* get capabilities */ 566 { 567 snd_capabilities *p = (snd_capabilities *)arg; 568 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL; 569 struct cdev *pdev; 570 571 if (rdch) { 572 CHN_LOCK(rdch); 573 rcaps = chn_getcaps(rdch); 574 } 575 if (wrch) { 576 CHN_LOCK(wrch); 577 pcaps = chn_getcaps(wrch); 578 } 579 p->rate_min = max(rcaps? rcaps->minspeed : 0, 580 pcaps? pcaps->minspeed : 0); 581 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 582 pcaps? pcaps->maxspeed : 1000000); 583 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000, 584 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000); 585 /* XXX bad on sb16 */ 586 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & 587 (wrch? chn_getformats(wrch) : 0xffffffff); 588 if (rdch && wrch) 589 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; 590 pdev = d->mixer_dev; 591 p->mixers = 1; /* default: one mixer */ 592 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0; 593 p->left = p->right = 100; 594 if (rdch) 595 CHN_UNLOCK(rdch); 596 if (wrch) 597 CHN_UNLOCK(wrch); 598 } 599 break; 600 601 case AIOSTOP: 602 if (*arg_i == AIOSYNC_PLAY && wrch) { 603 CHN_LOCK(wrch); 604 *arg_i = chn_abort(wrch); 605 CHN_UNLOCK(wrch); 606 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) { 607 CHN_LOCK(rdch); 608 *arg_i = chn_abort(rdch); 609 CHN_UNLOCK(rdch); 610 } else { 611 printf("AIOSTOP: bad channel 0x%x\n", *arg_i); 612 *arg_i = 0; 613 } 614 break; 615 616 case AIOSYNC: 617 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", 618 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); 619 break; 620 #endif 621 /* 622 * here follow the standard ioctls (filio.h etc.) 623 */ 624 case FIONREAD: /* get # bytes to read */ 625 if (rdch) { 626 CHN_LOCK(rdch); 627 /* if (rdch && rdch->bufhard.dl) 628 while (chn_rdfeed(rdch) == 0); 629 */ 630 *arg_i = sndbuf_getready(rdch->bufsoft); 631 CHN_UNLOCK(rdch); 632 } else 633 *arg_i = 0; 634 break; 635 636 case FIOASYNC: /*set/clear async i/o */ 637 DEB( printf("FIOASYNC\n") ; ) 638 break; 639 640 case SNDCTL_DSP_NONBLOCK: 641 case FIONBIO: /* set/clear non-blocking i/o */ 642 if (rdch) { 643 CHN_LOCK(rdch); 644 if (*arg_i) 645 rdch->flags |= CHN_F_NBIO; 646 else 647 rdch->flags &= ~CHN_F_NBIO; 648 CHN_UNLOCK(rdch); 649 } 650 if (wrch) { 651 CHN_LOCK(wrch); 652 if (*arg_i) 653 wrch->flags |= CHN_F_NBIO; 654 else 655 wrch->flags &= ~CHN_F_NBIO; 656 CHN_UNLOCK(wrch); 657 } 658 break; 659 660 /* 661 * Finally, here is the linux-compatible ioctl interface 662 */ 663 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) 664 case THE_REAL_SNDCTL_DSP_GETBLKSIZE: 665 case SNDCTL_DSP_GETBLKSIZE: 666 chn = wrch ? wrch : rdch; 667 CHN_LOCK(chn); 668 *arg_i = sndbuf_getblksz(chn->bufsoft); 669 CHN_UNLOCK(chn); 670 break ; 671 672 case SNDCTL_DSP_SETBLKSIZE: 673 RANGE(*arg_i, 16, 65536); 674 if (wrch) { 675 CHN_LOCK(wrch); 676 chn_setblocksize(wrch, 2, *arg_i); 677 CHN_UNLOCK(wrch); 678 } 679 if (rdch) { 680 CHN_LOCK(rdch); 681 chn_setblocksize(rdch, 2, *arg_i); 682 CHN_UNLOCK(rdch); 683 } 684 break; 685 686 case SNDCTL_DSP_RESET: 687 DEB(printf("dsp reset\n")); 688 if (wrch) { 689 CHN_LOCK(wrch); 690 chn_abort(wrch); 691 chn_resetbuf(wrch); 692 CHN_UNLOCK(wrch); 693 } 694 if (rdch) { 695 CHN_LOCK(rdch); 696 chn_abort(rdch); 697 chn_resetbuf(rdch); 698 CHN_UNLOCK(rdch); 699 } 700 break; 701 702 case SNDCTL_DSP_SYNC: 703 DEB(printf("dsp sync\n")); 704 /* chn_sync may sleep */ 705 if (wrch) { 706 CHN_LOCK(wrch); 707 chn_sync(wrch, sndbuf_getsize(wrch->bufsoft) - 4); 708 CHN_UNLOCK(wrch); 709 } 710 break; 711 712 case SNDCTL_DSP_SPEED: 713 /* chn_setspeed may sleep */ 714 tmp = 0; 715 if (wrch) { 716 CHN_LOCK(wrch); 717 ret = chn_setspeed(wrch, *arg_i); 718 tmp = wrch->speed; 719 CHN_UNLOCK(wrch); 720 } 721 if (rdch && ret == 0) { 722 CHN_LOCK(rdch); 723 ret = chn_setspeed(rdch, *arg_i); 724 if (tmp == 0) 725 tmp = rdch->speed; 726 CHN_UNLOCK(rdch); 727 } 728 *arg_i = tmp; 729 break; 730 731 case SOUND_PCM_READ_RATE: 732 chn = wrch ? wrch : rdch; 733 CHN_LOCK(chn); 734 *arg_i = chn->speed; 735 CHN_UNLOCK(chn); 736 break; 737 738 case SNDCTL_DSP_STEREO: 739 tmp = -1; 740 *arg_i = (*arg_i)? AFMT_STEREO : 0; 741 if (wrch) { 742 CHN_LOCK(wrch); 743 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 744 tmp = (wrch->format & AFMT_STEREO)? 1 : 0; 745 CHN_UNLOCK(wrch); 746 } 747 if (rdch && ret == 0) { 748 CHN_LOCK(rdch); 749 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 750 if (tmp == -1) 751 tmp = (rdch->format & AFMT_STEREO)? 1 : 0; 752 CHN_UNLOCK(rdch); 753 } 754 *arg_i = tmp; 755 break; 756 757 case SOUND_PCM_WRITE_CHANNELS: 758 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 759 if (*arg_i != 0) { 760 tmp = 0; 761 *arg_i = (*arg_i != 1)? AFMT_STEREO : 0; 762 if (wrch) { 763 CHN_LOCK(wrch); 764 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 765 tmp = (wrch->format & AFMT_STEREO)? 2 : 1; 766 CHN_UNLOCK(wrch); 767 } 768 if (rdch && ret == 0) { 769 CHN_LOCK(rdch); 770 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 771 if (tmp == 0) 772 tmp = (rdch->format & AFMT_STEREO)? 2 : 1; 773 CHN_UNLOCK(rdch); 774 } 775 *arg_i = tmp; 776 } else { 777 chn = wrch ? wrch : rdch; 778 CHN_LOCK(chn); 779 *arg_i = (chn->format & AFMT_STEREO) ? 2 : 1; 780 CHN_UNLOCK(chn); 781 } 782 break; 783 784 case SOUND_PCM_READ_CHANNELS: 785 chn = wrch ? wrch : rdch; 786 CHN_LOCK(chn); 787 *arg_i = (chn->format & AFMT_STEREO) ? 2 : 1; 788 CHN_UNLOCK(chn); 789 break; 790 791 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 792 chn = wrch ? wrch : rdch; 793 CHN_LOCK(chn); 794 *arg_i = chn_getformats(chn); 795 CHN_UNLOCK(chn); 796 break ; 797 798 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 799 if ((*arg_i != AFMT_QUERY)) { 800 tmp = 0; 801 if (wrch) { 802 CHN_LOCK(wrch); 803 ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO)); 804 tmp = wrch->format & ~AFMT_STEREO; 805 CHN_UNLOCK(wrch); 806 } 807 if (rdch && ret == 0) { 808 CHN_LOCK(rdch); 809 ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO)); 810 if (tmp == 0) 811 tmp = rdch->format & ~AFMT_STEREO; 812 CHN_UNLOCK(rdch); 813 } 814 *arg_i = tmp; 815 } else { 816 chn = wrch ? wrch : rdch; 817 CHN_LOCK(chn); 818 *arg_i = chn->format & ~AFMT_STEREO; 819 CHN_UNLOCK(chn); 820 } 821 break; 822 823 case SNDCTL_DSP_SETFRAGMENT: 824 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 825 { 826 u_int32_t fragln = (*arg_i) & 0x0000ffff; 827 u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 828 u_int32_t fragsz; 829 830 RANGE(fragln, 4, 16); 831 fragsz = 1 << fragln; 832 833 if (maxfrags == 0) 834 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 835 if (maxfrags < 2) 836 maxfrags = 2; 837 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 838 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 839 840 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 841 if (rdch) { 842 CHN_LOCK(rdch); 843 ret = chn_setblocksize(rdch, maxfrags, fragsz); 844 maxfrags = sndbuf_getblkcnt(rdch->bufsoft); 845 fragsz = sndbuf_getblksz(rdch->bufsoft); 846 CHN_UNLOCK(rdch); 847 } 848 if (wrch && ret == 0) { 849 CHN_LOCK(wrch); 850 ret = chn_setblocksize(wrch, maxfrags, fragsz); 851 maxfrags = sndbuf_getblkcnt(wrch->bufsoft); 852 fragsz = sndbuf_getblksz(wrch->bufsoft); 853 CHN_UNLOCK(wrch); 854 } 855 856 fragln = 0; 857 while (fragsz > 1) { 858 fragln++; 859 fragsz >>= 1; 860 } 861 *arg_i = (maxfrags << 16) | fragln; 862 } 863 break; 864 865 case SNDCTL_DSP_GETISPACE: 866 /* return the size of data available in the input queue */ 867 { 868 audio_buf_info *a = (audio_buf_info *)arg; 869 if (rdch) { 870 struct snd_dbuf *bs = rdch->bufsoft; 871 872 CHN_LOCK(rdch); 873 a->bytes = sndbuf_getready(bs); 874 a->fragments = a->bytes / sndbuf_getblksz(bs); 875 a->fragstotal = sndbuf_getblkcnt(bs); 876 a->fragsize = sndbuf_getblksz(bs); 877 CHN_UNLOCK(rdch); 878 } 879 } 880 break; 881 882 case SNDCTL_DSP_GETOSPACE: 883 /* return space available in the output queue */ 884 { 885 audio_buf_info *a = (audio_buf_info *)arg; 886 if (wrch) { 887 struct snd_dbuf *bs = wrch->bufsoft; 888 889 CHN_LOCK(wrch); 890 chn_wrupdate(wrch); 891 a->bytes = sndbuf_getfree(bs); 892 a->fragments = a->bytes / sndbuf_getblksz(bs); 893 a->fragstotal = sndbuf_getblkcnt(bs); 894 a->fragsize = sndbuf_getblksz(bs); 895 CHN_UNLOCK(wrch); 896 } 897 } 898 break; 899 900 case SNDCTL_DSP_GETIPTR: 901 { 902 count_info *a = (count_info *)arg; 903 if (rdch) { 904 struct snd_dbuf *bs = rdch->bufsoft; 905 906 CHN_LOCK(rdch); 907 chn_rdupdate(rdch); 908 a->bytes = sndbuf_gettotal(bs); 909 a->blocks = sndbuf_getblocks(bs) - rdch->blocks; 910 a->ptr = sndbuf_getreadyptr(bs); 911 rdch->blocks = sndbuf_getblocks(bs); 912 CHN_UNLOCK(rdch); 913 } else 914 ret = EINVAL; 915 } 916 break; 917 918 case SNDCTL_DSP_GETOPTR: 919 { 920 count_info *a = (count_info *)arg; 921 if (wrch) { 922 struct snd_dbuf *bs = wrch->bufsoft; 923 924 CHN_LOCK(wrch); 925 chn_wrupdate(wrch); 926 a->bytes = sndbuf_gettotal(bs); 927 a->blocks = sndbuf_getblocks(bs) - wrch->blocks; 928 a->ptr = sndbuf_getreadyptr(bs); 929 wrch->blocks = sndbuf_getblocks(bs); 930 CHN_UNLOCK(wrch); 931 } else 932 ret = EINVAL; 933 } 934 break; 935 936 case SNDCTL_DSP_GETCAPS: 937 *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER; 938 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 939 *arg_i |= DSP_CAP_DUPLEX; 940 break; 941 942 case SOUND_PCM_READ_BITS: 943 chn = wrch ? wrch : rdch; 944 CHN_LOCK(chn); 945 *arg_i = (chn->format & AFMT_16BIT) ? 16 : 8; 946 CHN_UNLOCK(chn); 947 break; 948 949 case SNDCTL_DSP_SETTRIGGER: 950 if (rdch) { 951 CHN_LOCK(rdch); 952 rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 953 if (*arg_i & PCM_ENABLE_INPUT) 954 chn_start(rdch, 1); 955 else 956 rdch->flags |= CHN_F_NOTRIGGER; 957 CHN_UNLOCK(rdch); 958 } 959 if (wrch) { 960 CHN_LOCK(wrch); 961 wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 962 if (*arg_i & PCM_ENABLE_OUTPUT) 963 chn_start(wrch, 1); 964 else 965 wrch->flags |= CHN_F_NOTRIGGER; 966 CHN_UNLOCK(wrch); 967 } 968 break; 969 970 case SNDCTL_DSP_GETTRIGGER: 971 *arg_i = 0; 972 if (wrch) { 973 CHN_LOCK(wrch); 974 if (wrch->flags & CHN_F_TRIGGERED) 975 *arg_i |= PCM_ENABLE_OUTPUT; 976 CHN_UNLOCK(wrch); 977 } 978 if (rdch) { 979 CHN_LOCK(rdch); 980 if (rdch->flags & CHN_F_TRIGGERED) 981 *arg_i |= PCM_ENABLE_INPUT; 982 CHN_UNLOCK(rdch); 983 } 984 break; 985 986 case SNDCTL_DSP_GETODELAY: 987 if (wrch) { 988 struct snd_dbuf *b = wrch->bufhard; 989 struct snd_dbuf *bs = wrch->bufsoft; 990 991 CHN_LOCK(wrch); 992 chn_wrupdate(wrch); 993 *arg_i = sndbuf_getready(b) + sndbuf_getready(bs); 994 CHN_UNLOCK(wrch); 995 } else 996 ret = EINVAL; 997 break; 998 999 case SNDCTL_DSP_POST: 1000 if (wrch) { 1001 CHN_LOCK(wrch); 1002 wrch->flags &= ~CHN_F_NOTRIGGER; 1003 chn_start(wrch, 1); 1004 CHN_UNLOCK(wrch); 1005 } 1006 break; 1007 1008 case SNDCTL_DSP_SETDUPLEX: 1009 /* 1010 * switch to full-duplex mode if card is in half-duplex 1011 * mode and is able to work in full-duplex mode 1012 */ 1013 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 1014 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX); 1015 break; 1016 1017 case SNDCTL_DSP_MAPINBUF: 1018 case SNDCTL_DSP_MAPOUTBUF: 1019 case SNDCTL_DSP_SETSYNCRO: 1020 /* undocumented */ 1021 1022 case SNDCTL_DSP_SUBDIVIDE: 1023 case SOUND_PCM_WRITE_FILTER: 1024 case SOUND_PCM_READ_FILTER: 1025 /* dunno what these do, don't sound important */ 1026 1027 default: 1028 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd)); 1029 ret = EINVAL; 1030 break; 1031 } 1032 relchns(i_dev, rdch, wrch, 0); 1033 splx(s); 1034 return ret; 1035 } 1036 1037 static int 1038 dsp_poll(struct cdev *i_dev, int events, struct thread *td) 1039 { 1040 struct pcm_channel *wrch = NULL, *rdch = NULL; 1041 intrmask_t s; 1042 int ret, e; 1043 1044 s = spltty(); 1045 ret = 0; 1046 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1047 1048 if (wrch) { 1049 e = (events & (POLLOUT | POLLWRNORM)); 1050 if (e) 1051 ret |= chn_poll(wrch, e, td); 1052 } 1053 if (rdch) { 1054 e = (events & (POLLIN | POLLRDNORM)); 1055 if (e) 1056 ret |= chn_poll(rdch, e, td); 1057 } 1058 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1059 1060 splx(s); 1061 return ret; 1062 } 1063 1064 static int 1065 dsp_mmap(struct cdev *i_dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot) 1066 { 1067 struct pcm_channel *wrch = NULL, *rdch = NULL, *c; 1068 intrmask_t s; 1069 1070 if (nprot & PROT_EXEC) 1071 return -1; 1072 1073 s = spltty(); 1074 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1075 #if 0 1076 /* 1077 * XXX the linux api uses the nprot to select read/write buffer 1078 * our vm system doesn't allow this, so force write buffer 1079 */ 1080 1081 if (wrch && (nprot & PROT_WRITE)) { 1082 c = wrch; 1083 } else if (rdch && (nprot & PROT_READ)) { 1084 c = rdch; 1085 } else { 1086 splx(s); 1087 return -1; 1088 } 1089 #else 1090 c = wrch; 1091 #endif 1092 1093 if (c == NULL) { 1094 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1095 splx(s); 1096 return -1; 1097 } 1098 1099 if (offset >= sndbuf_getsize(c->bufsoft)) { 1100 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1101 splx(s); 1102 return -1; 1103 } 1104 1105 if (!(c->flags & CHN_F_MAPPED)) 1106 c->flags |= CHN_F_MAPPED; 1107 1108 *paddr = vtophys(sndbuf_getbufofs(c->bufsoft, offset)); 1109 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1110 1111 splx(s); 1112 return 0; 1113 } 1114 1115 #ifdef USING_DEVFS 1116 1117 /* 1118 * Clone logic is this: 1119 * x E X = {dsp, dspW, audio} 1120 * x -> x${sysctl("hw.snd.unit")} 1121 * xN-> 1122 * for i N = 1 to channels of device N 1123 * if xN.i isn't busy, return its dev_t 1124 */ 1125 static void 1126 dsp_clone(void *arg, struct ucred *cred, char *name, int namelen, 1127 struct cdev **dev) 1128 { 1129 struct cdev *pdev; 1130 struct snddev_info *pcm_dev; 1131 struct snddev_channel *pcm_chan; 1132 int i, unit, devtype; 1133 int devtypes[3] = {SND_DEV_DSP, SND_DEV_DSP16, SND_DEV_AUDIO}; 1134 char *devnames[3] = {"dsp", "dspW", "audio"}; 1135 1136 if (*dev != NULL) 1137 return; 1138 if (pcm_devclass == NULL) 1139 return; 1140 1141 devtype = 0; 1142 unit = -1; 1143 for (i = 0; (i < 3) && (unit == -1); i++) { 1144 devtype = devtypes[i]; 1145 if (strcmp(name, devnames[i]) == 0) { 1146 unit = snd_unit; 1147 } else { 1148 if (dev_stdclone(name, NULL, devnames[i], &unit) != 1) 1149 unit = -1; 1150 } 1151 } 1152 if (unit == -1 || unit >= devclass_get_maxunit(pcm_devclass)) 1153 return; 1154 1155 pcm_dev = devclass_get_softc(pcm_devclass, unit); 1156 1157 if (pcm_dev == NULL) 1158 return; 1159 1160 SLIST_FOREACH(pcm_chan, &pcm_dev->channels, link) { 1161 1162 switch(devtype) { 1163 case SND_DEV_DSP: 1164 pdev = pcm_chan->dsp_devt; 1165 break; 1166 case SND_DEV_DSP16: 1167 pdev = pcm_chan->dspW_devt; 1168 break; 1169 case SND_DEV_AUDIO: 1170 pdev = pcm_chan->audio_devt; 1171 break; 1172 default: 1173 panic("Unknown devtype %d", devtype); 1174 } 1175 1176 if ((pdev->si_drv1 == NULL) && (pdev->si_drv2 == NULL)) { 1177 *dev = pdev; 1178 dev_ref(*dev); 1179 return; 1180 } 1181 } 1182 } 1183 1184 static void 1185 dsp_sysinit(void *p) 1186 { 1187 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000); 1188 } 1189 1190 static void 1191 dsp_sysuninit(void *p) 1192 { 1193 if (dsp_ehtag != NULL) 1194 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag); 1195 } 1196 1197 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL); 1198 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL); 1199 #endif 1200 1201
Cache object: 496411e4e8afdab78536d63a958d9f24
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