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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/6.1/sys/dev/sound/pcm/dsp.c 157495 2006-04-04 17:43:49Z ariff $"); 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 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 u_int32_t fmt; 172 int devtype; 173 int error; 174 int chnum; 175 176 if (i_dev == NULL || td == NULL) 177 return ENODEV; 178 179 if ((flags & (FREAD | FWRITE)) == 0) 180 return EINVAL; 181 182 d = dsp_get_info(i_dev); 183 devtype = PCMDEV(i_dev); 184 chnum = -1; 185 186 /* decide default format */ 187 switch (devtype) { 188 case SND_DEV_DSP16: 189 fmt = AFMT_S16_LE; 190 break; 191 192 case SND_DEV_DSP: 193 fmt = AFMT_U8; 194 break; 195 196 case SND_DEV_AUDIO: 197 fmt = AFMT_MU_LAW; 198 break; 199 200 case SND_DEV_NORESET: 201 fmt = 0; 202 break; 203 204 case SND_DEV_DSPREC: 205 fmt = AFMT_U8; 206 if (flags & FWRITE) 207 return EINVAL; 208 chnum = PCMCHAN(i_dev); 209 break; 210 211 default: 212 panic("impossible devtype %d", devtype); 213 } 214 215 /* lock snddev so nobody else can monkey with it */ 216 pcm_lock(d); 217 218 rdch = i_dev->si_drv1; 219 wrch = i_dev->si_drv2; 220 221 if (rdch || wrch || ((dsp_get_flags(i_dev) & SD_F_SIMPLEX) && 222 (flags & (FREAD | FWRITE)) == (FREAD | FWRITE))) { 223 /* simplex or not, better safe than sorry. */ 224 pcm_unlock(d); 225 return EBUSY; 226 } 227 228 /* 229 * if we get here, the open request is valid- either: 230 * * we were previously not open 231 * * we were open for play xor record and the opener wants 232 * the non-open direction 233 */ 234 if (flags & FREAD) { 235 /* open for read */ 236 pcm_unlock(d); 237 error = pcm_chnalloc(d, &rdch, PCMDIR_REC, td->td_proc->p_pid, chnum); 238 if (error != 0 && error != EBUSY && chnum != -1 && (flags & FWRITE)) 239 error = pcm_chnalloc(d, &rdch, PCMDIR_REC, td->td_proc->p_pid, -1); 240 241 if (error == 0 && (chn_reset(rdch, fmt) || 242 (fmt && chn_setspeed(rdch, DSP_DEFAULT_SPEED)))) 243 error = ENODEV; 244 245 if (error != 0) { 246 if (rdch) 247 pcm_chnrelease(rdch); 248 return error; 249 } 250 251 if (flags & O_NONBLOCK) 252 rdch->flags |= CHN_F_NBIO; 253 pcm_chnref(rdch, 1); 254 CHN_UNLOCK(rdch); 255 pcm_lock(d); 256 } 257 258 if (flags & FWRITE) { 259 /* open for write */ 260 pcm_unlock(d); 261 error = pcm_chnalloc(d, &wrch, PCMDIR_PLAY, td->td_proc->p_pid, chnum); 262 if (error != 0 && error != EBUSY && chnum != -1 && (flags & FREAD)) 263 error = pcm_chnalloc(d, &wrch, PCMDIR_PLAY, td->td_proc->p_pid, -1); 264 265 if (error == 0 && (chn_reset(wrch, fmt) || 266 (fmt && chn_setspeed(wrch, DSP_DEFAULT_SPEED)))) 267 error = ENODEV; 268 269 if (error != 0) { 270 if (wrch) 271 pcm_chnrelease(wrch); 272 if (rdch) { 273 /* 274 * Lock, deref and release previously created record channel 275 */ 276 CHN_LOCK(rdch); 277 pcm_chnref(rdch, -1); 278 pcm_chnrelease(rdch); 279 } 280 281 return error; 282 } 283 284 if (flags & O_NONBLOCK) 285 wrch->flags |= CHN_F_NBIO; 286 pcm_chnref(wrch, 1); 287 CHN_UNLOCK(wrch); 288 pcm_lock(d); 289 } 290 291 i_dev->si_drv1 = rdch; 292 i_dev->si_drv2 = wrch; 293 294 pcm_unlock(d); 295 return 0; 296 } 297 298 static int 299 dsp_close(struct cdev *i_dev, int flags, int mode, struct thread *td) 300 { 301 struct pcm_channel *rdch, *wrch; 302 struct snddev_info *d; 303 int refs; 304 305 d = dsp_get_info(i_dev); 306 pcm_lock(d); 307 rdch = i_dev->si_drv1; 308 wrch = i_dev->si_drv2; 309 pcm_unlock(d); 310 311 if (rdch || wrch) { 312 refs = 0; 313 if (rdch) { 314 CHN_LOCK(rdch); 315 refs += pcm_chnref(rdch, -1); 316 chn_abort(rdch); /* won't sleep */ 317 rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 318 chn_reset(rdch, 0); 319 pcm_chnrelease(rdch); 320 } 321 if (wrch) { 322 CHN_LOCK(wrch); 323 refs += pcm_chnref(wrch, -1); 324 /* 325 * XXX: Maybe the right behaviour is to abort on non_block. 326 * It seems that mplayer flushes the audio queue by quickly 327 * closing and re-opening. In FBSD, there's a long pause 328 * while the audio queue flushes that I presume isn't there in 329 * linux. 330 */ 331 chn_flush(wrch); /* may sleep */ 332 wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 333 chn_reset(wrch, 0); 334 pcm_chnrelease(wrch); 335 } 336 337 pcm_lock(d); 338 if (rdch) 339 i_dev->si_drv1 = NULL; 340 if (wrch) 341 i_dev->si_drv2 = NULL; 342 /* 343 * If there are no more references, release the channels. 344 */ 345 if (refs == 0 && i_dev->si_drv1 == NULL && 346 i_dev->si_drv2 == NULL) { 347 if (pcm_getfakechan(d)) 348 pcm_getfakechan(d)->flags = 0; 349 /* What is this?!? */ 350 dsp_set_flags(i_dev, dsp_get_flags(i_dev) & ~SD_F_TRANSIENT); 351 } 352 pcm_unlock(d); 353 } 354 return 0; 355 } 356 357 static int 358 dsp_read(struct cdev *i_dev, struct uio *buf, int flag) 359 { 360 struct pcm_channel *rdch, *wrch; 361 int ret; 362 363 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD); 364 365 KASSERT(rdch, ("dsp_read: nonexistant channel")); 366 KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel")); 367 368 if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { 369 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); 370 return EINVAL; 371 } 372 if (!(rdch->flags & CHN_F_RUNNING)) 373 rdch->flags |= CHN_F_RUNNING; 374 ret = chn_read(rdch, buf); 375 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD); 376 377 return ret; 378 } 379 380 static int 381 dsp_write(struct cdev *i_dev, struct uio *buf, int flag) 382 { 383 struct pcm_channel *rdch, *wrch; 384 int ret; 385 386 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_WR); 387 388 KASSERT(wrch, ("dsp_write: nonexistant channel")); 389 KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel")); 390 391 if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) { 392 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); 393 return EINVAL; 394 } 395 if (!(wrch->flags & CHN_F_RUNNING)) 396 wrch->flags |= CHN_F_RUNNING; 397 ret = chn_write(wrch, buf); 398 relchns(i_dev, rdch, wrch, SD_F_PRIO_WR); 399 400 return ret; 401 } 402 403 static int 404 dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td) 405 { 406 struct pcm_channel *chn, *rdch, *wrch; 407 struct snddev_info *d; 408 int kill; 409 int ret = 0, *arg_i = (int *)arg, tmp; 410 411 /* 412 * this is an evil hack to allow broken apps to perform mixer ioctls 413 * on dsp devices. 414 */ 415 416 d = dsp_get_info(i_dev); 417 if (IOCGROUP(cmd) == 'M') { 418 /* 419 * This is at least, a bug to bug compatible with OSS. 420 */ 421 if (d->mixer_dev != NULL) 422 return mixer_ioctl(d->mixer_dev, cmd, arg, -1, td); 423 else 424 return EBADF; 425 } 426 427 getchns(i_dev, &rdch, &wrch, 0); 428 429 kill = 0; 430 if (wrch && (wrch->flags & CHN_F_DEAD)) 431 kill |= 1; 432 if (rdch && (rdch->flags & CHN_F_DEAD)) 433 kill |= 2; 434 if (kill == 3) { 435 relchns(i_dev, rdch, wrch, 0); 436 return EINVAL; 437 } 438 if (kill & 1) 439 wrch = NULL; 440 if (kill & 2) 441 rdch = NULL; 442 443 switch(cmd) { 444 #ifdef OLDPCM_IOCTL 445 /* 446 * we start with the new ioctl interface. 447 */ 448 case AIONWRITE: /* how many bytes can write ? */ 449 if (wrch) { 450 CHN_LOCK(wrch); 451 /* 452 if (wrch && wrch->bufhard.dl) 453 while (chn_wrfeed(wrch) == 0); 454 */ 455 *arg_i = sndbuf_getfree(wrch->bufsoft); 456 CHN_UNLOCK(wrch); 457 } else { 458 *arg_i = 0; 459 ret = EINVAL; 460 } 461 break; 462 463 case AIOSSIZE: /* set the current blocksize */ 464 { 465 struct snd_size *p = (struct snd_size *)arg; 466 467 p->play_size = 0; 468 p->rec_size = 0; 469 if (wrch) { 470 CHN_LOCK(wrch); 471 chn_setblocksize(wrch, 2, p->play_size); 472 p->play_size = sndbuf_getblksz(wrch->bufsoft); 473 CHN_UNLOCK(wrch); 474 } 475 if (rdch) { 476 CHN_LOCK(rdch); 477 chn_setblocksize(rdch, 2, p->rec_size); 478 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 479 CHN_UNLOCK(rdch); 480 } 481 } 482 break; 483 case AIOGSIZE: /* get the current blocksize */ 484 { 485 struct snd_size *p = (struct snd_size *)arg; 486 487 if (wrch) { 488 CHN_LOCK(wrch); 489 p->play_size = sndbuf_getblksz(wrch->bufsoft); 490 CHN_UNLOCK(wrch); 491 } 492 if (rdch) { 493 CHN_LOCK(rdch); 494 p->rec_size = sndbuf_getblksz(rdch->bufsoft); 495 CHN_UNLOCK(rdch); 496 } 497 } 498 break; 499 500 case AIOSFMT: 501 case AIOGFMT: 502 { 503 snd_chan_param *p = (snd_chan_param *)arg; 504 505 if (cmd == AIOSFMT && 506 ((p->play_format != 0 && p->play_rate == 0) || 507 (p->rec_format != 0 && p->rec_rate == 0))) { 508 ret = EINVAL; 509 break; 510 } 511 if (wrch) { 512 CHN_LOCK(wrch); 513 if (cmd == AIOSFMT && p->play_format != 0) { 514 chn_setformat(wrch, p->play_format); 515 chn_setspeed(wrch, p->play_rate); 516 } 517 p->play_rate = wrch->speed; 518 p->play_format = wrch->format; 519 CHN_UNLOCK(wrch); 520 } else { 521 p->play_rate = 0; 522 p->play_format = 0; 523 } 524 if (rdch) { 525 CHN_LOCK(rdch); 526 if (cmd == AIOSFMT && p->rec_format != 0) { 527 chn_setformat(rdch, p->rec_format); 528 chn_setspeed(rdch, p->rec_rate); 529 } 530 p->rec_rate = rdch->speed; 531 p->rec_format = rdch->format; 532 CHN_UNLOCK(rdch); 533 } else { 534 p->rec_rate = 0; 535 p->rec_format = 0; 536 } 537 } 538 break; 539 540 case AIOGCAP: /* get capabilities */ 541 { 542 snd_capabilities *p = (snd_capabilities *)arg; 543 struct pcmchan_caps *pcaps = NULL, *rcaps = NULL; 544 struct cdev *pdev; 545 546 if (rdch) { 547 CHN_LOCK(rdch); 548 rcaps = chn_getcaps(rdch); 549 } 550 if (wrch) { 551 CHN_LOCK(wrch); 552 pcaps = chn_getcaps(wrch); 553 } 554 p->rate_min = max(rcaps? rcaps->minspeed : 0, 555 pcaps? pcaps->minspeed : 0); 556 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 557 pcaps? pcaps->maxspeed : 1000000); 558 p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000, 559 wrch? sndbuf_getsize(wrch->bufsoft) : 1000000); 560 /* XXX bad on sb16 */ 561 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & 562 (wrch? chn_getformats(wrch) : 0xffffffff); 563 if (rdch && wrch) 564 p->formats |= (dsp_get_flags(i_dev) & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; 565 pdev = d->mixer_dev; 566 p->mixers = 1; /* default: one mixer */ 567 p->inputs = pdev->si_drv1? mix_getdevs(pdev->si_drv1) : 0; 568 p->left = p->right = 100; 569 if (rdch) 570 CHN_UNLOCK(rdch); 571 if (wrch) 572 CHN_UNLOCK(wrch); 573 } 574 break; 575 576 case AIOSTOP: 577 if (*arg_i == AIOSYNC_PLAY && wrch) { 578 CHN_LOCK(wrch); 579 *arg_i = chn_abort(wrch); 580 CHN_UNLOCK(wrch); 581 } else if (*arg_i == AIOSYNC_CAPTURE && rdch) { 582 CHN_LOCK(rdch); 583 *arg_i = chn_abort(rdch); 584 CHN_UNLOCK(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) { 601 CHN_LOCK(rdch); 602 /* if (rdch && rdch->bufhard.dl) 603 while (chn_rdfeed(rdch) == 0); 604 */ 605 *arg_i = sndbuf_getready(rdch->bufsoft); 606 CHN_UNLOCK(rdch); 607 } else { 608 *arg_i = 0; 609 ret = EINVAL; 610 } 611 break; 612 613 case FIOASYNC: /*set/clear async i/o */ 614 DEB( printf("FIOASYNC\n") ; ) 615 break; 616 617 case SNDCTL_DSP_NONBLOCK: 618 case FIONBIO: /* set/clear non-blocking i/o */ 619 if (rdch) { 620 CHN_LOCK(rdch); 621 if (*arg_i) 622 rdch->flags |= CHN_F_NBIO; 623 else 624 rdch->flags &= ~CHN_F_NBIO; 625 CHN_UNLOCK(rdch); 626 } 627 if (wrch) { 628 CHN_LOCK(wrch); 629 if (*arg_i) 630 wrch->flags |= CHN_F_NBIO; 631 else 632 wrch->flags &= ~CHN_F_NBIO; 633 CHN_UNLOCK(wrch); 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 chn = wrch ? wrch : rdch; 644 if (chn) { 645 CHN_LOCK(chn); 646 *arg_i = sndbuf_getblksz(chn->bufsoft); 647 CHN_UNLOCK(chn); 648 } else { 649 *arg_i = 0; 650 ret = EINVAL; 651 } 652 break ; 653 654 case SNDCTL_DSP_SETBLKSIZE: 655 RANGE(*arg_i, 16, 65536); 656 if (wrch) { 657 CHN_LOCK(wrch); 658 chn_setblocksize(wrch, 2, *arg_i); 659 CHN_UNLOCK(wrch); 660 } 661 if (rdch) { 662 CHN_LOCK(rdch); 663 chn_setblocksize(rdch, 2, *arg_i); 664 CHN_UNLOCK(rdch); 665 } 666 break; 667 668 case SNDCTL_DSP_RESET: 669 DEB(printf("dsp reset\n")); 670 if (wrch) { 671 CHN_LOCK(wrch); 672 chn_abort(wrch); 673 chn_resetbuf(wrch); 674 CHN_UNLOCK(wrch); 675 } 676 if (rdch) { 677 CHN_LOCK(rdch); 678 chn_abort(rdch); 679 chn_resetbuf(rdch); 680 CHN_UNLOCK(rdch); 681 } 682 break; 683 684 case SNDCTL_DSP_SYNC: 685 DEB(printf("dsp sync\n")); 686 /* chn_sync may sleep */ 687 if (wrch) { 688 CHN_LOCK(wrch); 689 chn_sync(wrch, sndbuf_getsize(wrch->bufsoft) - 4); 690 CHN_UNLOCK(wrch); 691 } 692 break; 693 694 case SNDCTL_DSP_SPEED: 695 /* chn_setspeed may sleep */ 696 tmp = 0; 697 if (wrch) { 698 CHN_LOCK(wrch); 699 ret = chn_setspeed(wrch, *arg_i); 700 tmp = wrch->speed; 701 CHN_UNLOCK(wrch); 702 } 703 if (rdch && ret == 0) { 704 CHN_LOCK(rdch); 705 ret = chn_setspeed(rdch, *arg_i); 706 if (tmp == 0) 707 tmp = rdch->speed; 708 CHN_UNLOCK(rdch); 709 } 710 *arg_i = tmp; 711 break; 712 713 case SOUND_PCM_READ_RATE: 714 chn = wrch ? wrch : rdch; 715 if (chn) { 716 CHN_LOCK(chn); 717 *arg_i = chn->speed; 718 CHN_UNLOCK(chn); 719 } else { 720 *arg_i = 0; 721 ret = EINVAL; 722 } 723 break; 724 725 case SNDCTL_DSP_STEREO: 726 tmp = -1; 727 *arg_i = (*arg_i)? AFMT_STEREO : 0; 728 if (wrch) { 729 CHN_LOCK(wrch); 730 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 731 tmp = (wrch->format & AFMT_STEREO)? 1 : 0; 732 CHN_UNLOCK(wrch); 733 } 734 if (rdch && ret == 0) { 735 CHN_LOCK(rdch); 736 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 737 if (tmp == -1) 738 tmp = (rdch->format & AFMT_STEREO)? 1 : 0; 739 CHN_UNLOCK(rdch); 740 } 741 *arg_i = tmp; 742 break; 743 744 case SOUND_PCM_WRITE_CHANNELS: 745 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 746 if (*arg_i != 0) { 747 tmp = 0; 748 *arg_i = (*arg_i != 1)? AFMT_STEREO : 0; 749 if (wrch) { 750 CHN_LOCK(wrch); 751 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | *arg_i); 752 tmp = (wrch->format & AFMT_STEREO)? 2 : 1; 753 CHN_UNLOCK(wrch); 754 } 755 if (rdch && ret == 0) { 756 CHN_LOCK(rdch); 757 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | *arg_i); 758 if (tmp == 0) 759 tmp = (rdch->format & AFMT_STEREO)? 2 : 1; 760 CHN_UNLOCK(rdch); 761 } 762 *arg_i = tmp; 763 } else { 764 chn = wrch ? wrch : rdch; 765 CHN_LOCK(chn); 766 *arg_i = (chn->format & AFMT_STEREO) ? 2 : 1; 767 CHN_UNLOCK(chn); 768 } 769 break; 770 771 case SOUND_PCM_READ_CHANNELS: 772 chn = wrch ? wrch : rdch; 773 if (chn) { 774 CHN_LOCK(chn); 775 *arg_i = (chn->format & AFMT_STEREO) ? 2 : 1; 776 CHN_UNLOCK(chn); 777 } else { 778 *arg_i = 0; 779 ret = EINVAL; 780 } 781 break; 782 783 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 784 chn = wrch ? wrch : rdch; 785 if (chn) { 786 CHN_LOCK(chn); 787 *arg_i = chn_getformats(chn); 788 CHN_UNLOCK(chn); 789 } else { 790 *arg_i = 0; 791 ret = EINVAL; 792 } 793 break ; 794 795 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 796 if ((*arg_i != AFMT_QUERY)) { 797 tmp = 0; 798 if (wrch) { 799 CHN_LOCK(wrch); 800 ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO)); 801 tmp = wrch->format & ~AFMT_STEREO; 802 CHN_UNLOCK(wrch); 803 } 804 if (rdch && ret == 0) { 805 CHN_LOCK(rdch); 806 ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO)); 807 if (tmp == 0) 808 tmp = rdch->format & ~AFMT_STEREO; 809 CHN_UNLOCK(rdch); 810 } 811 *arg_i = tmp; 812 } else { 813 chn = wrch ? wrch : rdch; 814 CHN_LOCK(chn); 815 *arg_i = chn->format & ~AFMT_STEREO; 816 CHN_UNLOCK(chn); 817 } 818 break; 819 820 case SNDCTL_DSP_SETFRAGMENT: 821 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 822 { 823 u_int32_t fragln = (*arg_i) & 0x0000ffff; 824 u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 825 u_int32_t fragsz; 826 u_int32_t r_maxfrags, r_fragsz; 827 828 RANGE(fragln, 4, 16); 829 fragsz = 1 << fragln; 830 831 if (maxfrags == 0) 832 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 833 if (maxfrags < 2) 834 maxfrags = 2; 835 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 836 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 837 838 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 839 if (rdch) { 840 CHN_LOCK(rdch); 841 ret = chn_setblocksize(rdch, maxfrags, fragsz); 842 r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft); 843 r_fragsz = sndbuf_getblksz(rdch->bufsoft); 844 CHN_UNLOCK(rdch); 845 } else { 846 r_maxfrags = maxfrags; 847 r_fragsz = fragsz; 848 } 849 if (wrch && ret == 0) { 850 CHN_LOCK(wrch); 851 ret = chn_setblocksize(wrch, maxfrags, fragsz); 852 maxfrags = sndbuf_getblkcnt(wrch->bufsoft); 853 fragsz = sndbuf_getblksz(wrch->bufsoft); 854 CHN_UNLOCK(wrch); 855 } else { /* use whatever came from the read channel */ 856 maxfrags = r_maxfrags; 857 fragsz = r_fragsz; 858 } 859 860 fragln = 0; 861 while (fragsz > 1) { 862 fragln++; 863 fragsz >>= 1; 864 } 865 *arg_i = (maxfrags << 16) | fragln; 866 } 867 break; 868 869 case SNDCTL_DSP_GETISPACE: 870 /* return the size of data available in the input queue */ 871 { 872 audio_buf_info *a = (audio_buf_info *)arg; 873 if (rdch) { 874 struct snd_dbuf *bs = rdch->bufsoft; 875 876 CHN_LOCK(rdch); 877 a->bytes = sndbuf_getready(bs); 878 a->fragments = a->bytes / sndbuf_getblksz(bs); 879 a->fragstotal = sndbuf_getblkcnt(bs); 880 a->fragsize = sndbuf_getblksz(bs); 881 CHN_UNLOCK(rdch); 882 } 883 } 884 break; 885 886 case SNDCTL_DSP_GETOSPACE: 887 /* return space available in the output queue */ 888 { 889 audio_buf_info *a = (audio_buf_info *)arg; 890 if (wrch) { 891 struct snd_dbuf *bs = wrch->bufsoft; 892 893 CHN_LOCK(wrch); 894 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 895 a->bytes = sndbuf_getfree(bs); 896 a->fragments = a->bytes / sndbuf_getblksz(bs); 897 a->fragstotal = sndbuf_getblkcnt(bs); 898 a->fragsize = sndbuf_getblksz(bs); 899 CHN_UNLOCK(wrch); 900 } 901 } 902 break; 903 904 case SNDCTL_DSP_GETIPTR: 905 { 906 count_info *a = (count_info *)arg; 907 if (rdch) { 908 struct snd_dbuf *bs = rdch->bufsoft; 909 910 CHN_LOCK(rdch); 911 /* XXX abusive DMA update: chn_rdupdate(rdch); */ 912 a->bytes = sndbuf_gettotal(bs); 913 a->blocks = sndbuf_getblocks(bs) - rdch->blocks; 914 a->ptr = sndbuf_getreadyptr(bs); 915 rdch->blocks = sndbuf_getblocks(bs); 916 CHN_UNLOCK(rdch); 917 } else 918 ret = EINVAL; 919 } 920 break; 921 922 case SNDCTL_DSP_GETOPTR: 923 { 924 count_info *a = (count_info *)arg; 925 if (wrch) { 926 struct snd_dbuf *bs = wrch->bufsoft; 927 928 CHN_LOCK(wrch); 929 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 930 a->bytes = sndbuf_gettotal(bs); 931 a->blocks = sndbuf_getblocks(bs) - wrch->blocks; 932 a->ptr = sndbuf_getreadyptr(bs); 933 wrch->blocks = sndbuf_getblocks(bs); 934 CHN_UNLOCK(wrch); 935 } else 936 ret = EINVAL; 937 } 938 break; 939 940 case SNDCTL_DSP_GETCAPS: 941 *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER; 942 if (rdch && wrch && !(dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 943 *arg_i |= DSP_CAP_DUPLEX; 944 break; 945 946 case SOUND_PCM_READ_BITS: 947 chn = wrch ? wrch : rdch; 948 if (chn) { 949 CHN_LOCK(chn); 950 if (chn->format & AFMT_8BIT) 951 *arg_i = 8; 952 else if (chn->format & AFMT_16BIT) 953 *arg_i = 16; 954 else if (chn->format & AFMT_24BIT) 955 *arg_i = 24; 956 else if (chn->format & AFMT_32BIT) 957 *arg_i = 32; 958 else 959 ret = EINVAL; 960 CHN_UNLOCK(chn); 961 } else { 962 *arg_i = 0; 963 ret = EINVAL; 964 } 965 break; 966 967 case SNDCTL_DSP_SETTRIGGER: 968 if (rdch) { 969 CHN_LOCK(rdch); 970 rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 971 if (*arg_i & PCM_ENABLE_INPUT) 972 chn_start(rdch, 1); 973 else 974 rdch->flags |= CHN_F_NOTRIGGER; 975 CHN_UNLOCK(rdch); 976 } 977 if (wrch) { 978 CHN_LOCK(wrch); 979 wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 980 if (*arg_i & PCM_ENABLE_OUTPUT) 981 chn_start(wrch, 1); 982 else 983 wrch->flags |= CHN_F_NOTRIGGER; 984 CHN_UNLOCK(wrch); 985 } 986 break; 987 988 case SNDCTL_DSP_GETTRIGGER: 989 *arg_i = 0; 990 if (wrch) { 991 CHN_LOCK(wrch); 992 if (wrch->flags & CHN_F_TRIGGERED) 993 *arg_i |= PCM_ENABLE_OUTPUT; 994 CHN_UNLOCK(wrch); 995 } 996 if (rdch) { 997 CHN_LOCK(rdch); 998 if (rdch->flags & CHN_F_TRIGGERED) 999 *arg_i |= PCM_ENABLE_INPUT; 1000 CHN_UNLOCK(rdch); 1001 } 1002 break; 1003 1004 case SNDCTL_DSP_GETODELAY: 1005 if (wrch) { 1006 struct snd_dbuf *b = wrch->bufhard; 1007 struct snd_dbuf *bs = wrch->bufsoft; 1008 1009 CHN_LOCK(wrch); 1010 /* XXX abusive DMA update: chn_wrupdate(wrch); */ 1011 *arg_i = sndbuf_getready(b) + sndbuf_getready(bs); 1012 CHN_UNLOCK(wrch); 1013 } else 1014 ret = EINVAL; 1015 break; 1016 1017 case SNDCTL_DSP_POST: 1018 if (wrch) { 1019 CHN_LOCK(wrch); 1020 wrch->flags &= ~CHN_F_NOTRIGGER; 1021 chn_start(wrch, 1); 1022 CHN_UNLOCK(wrch); 1023 } 1024 break; 1025 1026 case SNDCTL_DSP_SETDUPLEX: 1027 /* 1028 * switch to full-duplex mode if card is in half-duplex 1029 * mode and is able to work in full-duplex mode 1030 */ 1031 if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX)) 1032 dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX); 1033 break; 1034 1035 case SNDCTL_DSP_MAPINBUF: 1036 case SNDCTL_DSP_MAPOUTBUF: 1037 case SNDCTL_DSP_SETSYNCRO: 1038 /* undocumented */ 1039 1040 case SNDCTL_DSP_SUBDIVIDE: 1041 case SOUND_PCM_WRITE_FILTER: 1042 case SOUND_PCM_READ_FILTER: 1043 /* dunno what these do, don't sound important */ 1044 1045 default: 1046 DEB(printf("default ioctl fn 0x%08lx fail\n", cmd)); 1047 ret = EINVAL; 1048 break; 1049 } 1050 relchns(i_dev, rdch, wrch, 0); 1051 return ret; 1052 } 1053 1054 static int 1055 dsp_poll(struct cdev *i_dev, int events, struct thread *td) 1056 { 1057 struct pcm_channel *wrch = NULL, *rdch = NULL; 1058 int ret, e; 1059 1060 ret = 0; 1061 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1062 1063 if (wrch) { 1064 e = (events & (POLLOUT | POLLWRNORM)); 1065 if (e) 1066 ret |= chn_poll(wrch, e, td); 1067 } 1068 if (rdch) { 1069 e = (events & (POLLIN | POLLRDNORM)); 1070 if (e) 1071 ret |= chn_poll(rdch, e, td); 1072 } 1073 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1074 1075 return ret; 1076 } 1077 1078 static int 1079 dsp_mmap(struct cdev *i_dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot) 1080 { 1081 struct pcm_channel *wrch = NULL, *rdch = NULL, *c; 1082 1083 if (nprot & PROT_EXEC) 1084 return -1; 1085 1086 getchns(i_dev, &rdch, &wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1087 #if 0 1088 /* 1089 * XXX the linux api uses the nprot to select read/write buffer 1090 * our vm system doesn't allow this, so force write buffer 1091 */ 1092 1093 if (wrch && (nprot & PROT_WRITE)) { 1094 c = wrch; 1095 } else if (rdch && (nprot & PROT_READ)) { 1096 c = rdch; 1097 } else { 1098 return -1; 1099 } 1100 #else 1101 c = wrch; 1102 #endif 1103 1104 if (c == NULL) { 1105 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1106 return -1; 1107 } 1108 1109 if (offset >= sndbuf_getsize(c->bufsoft)) { 1110 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1111 return -1; 1112 } 1113 1114 if (!(c->flags & CHN_F_MAPPED)) 1115 c->flags |= CHN_F_MAPPED; 1116 1117 *paddr = vtophys(sndbuf_getbufofs(c->bufsoft, offset)); 1118 relchns(i_dev, rdch, wrch, SD_F_PRIO_RD | SD_F_PRIO_WR); 1119 1120 return 0; 1121 } 1122 1123 #ifdef USING_DEVFS 1124 1125 /* 1126 * Clone logic is this: 1127 * x E X = {dsp, dspW, audio} 1128 * x -> x${sysctl("hw.snd.unit")} 1129 * xN-> 1130 * for i N = 1 to channels of device N 1131 * if xN.i isn't busy, return its dev_t 1132 */ 1133 static void 1134 dsp_clone(void *arg, struct ucred *cred, char *name, int namelen, 1135 struct cdev **dev) 1136 { 1137 struct cdev *pdev; 1138 struct snddev_info *pcm_dev; 1139 struct snddev_channel *pcm_chan; 1140 int i, unit, devtype; 1141 static int devtypes[3] = {SND_DEV_DSP, SND_DEV_DSP16, SND_DEV_AUDIO}; 1142 static char *devnames[3] = {"dsp", "dspW", "audio"}; 1143 1144 if (*dev != NULL) 1145 return; 1146 if (pcm_devclass == NULL) 1147 return; 1148 1149 devtype = 0; 1150 unit = -1; 1151 for (i = 0; (i < 3) && (unit == -1); i++) { 1152 devtype = devtypes[i]; 1153 if (strcmp(name, devnames[i]) == 0) { 1154 unit = snd_unit; 1155 } else { 1156 if (dev_stdclone(name, NULL, devnames[i], &unit) != 1) 1157 unit = -1; 1158 } 1159 } 1160 if (unit == -1 || unit >= devclass_get_maxunit(pcm_devclass)) 1161 return; 1162 1163 pcm_dev = devclass_get_softc(pcm_devclass, unit); 1164 1165 if (pcm_dev == NULL) 1166 return; 1167 1168 SLIST_FOREACH(pcm_chan, &pcm_dev->channels, link) { 1169 1170 switch(devtype) { 1171 case SND_DEV_DSP: 1172 pdev = pcm_chan->dsp_devt; 1173 break; 1174 case SND_DEV_DSP16: 1175 pdev = pcm_chan->dspW_devt; 1176 break; 1177 case SND_DEV_AUDIO: 1178 pdev = pcm_chan->audio_devt; 1179 break; 1180 default: 1181 panic("Unknown devtype %d", devtype); 1182 } 1183 1184 if ((pdev != NULL) && (pdev->si_drv1 == NULL) && (pdev->si_drv2 == NULL)) { 1185 *dev = pdev; 1186 dev_ref(*dev); 1187 return; 1188 } 1189 } 1190 } 1191 1192 static void 1193 dsp_sysinit(void *p) 1194 { 1195 dsp_ehtag = EVENTHANDLER_REGISTER(dev_clone, dsp_clone, 0, 1000); 1196 } 1197 1198 static void 1199 dsp_sysuninit(void *p) 1200 { 1201 if (dsp_ehtag != NULL) 1202 EVENTHANDLER_DEREGISTER(dev_clone, dsp_ehtag); 1203 } 1204 1205 SYSINIT(dsp_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysinit, NULL); 1206 SYSUNINIT(dsp_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, dsp_sysuninit, NULL); 1207 #endif 1208 1209
Cache object: a9bdf9d785eb5e4fa8db46ecf3e4141d
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