dsp.c revision 64029
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 * $FreeBSD: head/sys/dev/sound/pcm/dsp.c 64029 2000-07-30 19:36:13Z cg $ 27 */ 28 29#include <sys/param.h> 30#include <sys/queue.h> 31 32#include <dev/sound/pcm/sound.h> 33 34#define OLDPCM_IOCTL 35 36static int getchns(snddev_info *d, int chan, pcm_channel **rdch, pcm_channel **wrch); 37 38static pcm_channel * 39allocchn(snddev_info *d, int direction) 40{ 41 pcm_channel *chns = (direction == PCMDIR_PLAY)? d->play : d->rec; 42 int i, cnt = (direction == PCMDIR_PLAY)? d->playcount : d->reccount; 43 for (i = 0; i < cnt; i++) { 44 if (!(chns[i].flags & (CHN_F_BUSY | CHN_F_DEAD))) { 45 chns[i].flags |= CHN_F_BUSY; 46 return &chns[i]; 47 } 48 } 49 return NULL; 50} 51 52static int 53getchns(snddev_info *d, int chan, pcm_channel **rdch, pcm_channel **wrch) 54{ 55 KASSERT((d->flags & SD_F_PRIO_SET) != SD_F_PRIO_SET, \ 56 ("getchns: read and write both prioritised")); 57 58 if ((d->flags & SD_F_SIMPLEX) && (d->flags & SD_F_PRIO_SET)) { 59 *rdch = (d->flags & SD_F_PRIO_RD)? d->arec[chan] : &d->fakechan; 60 *wrch = (d->flags & SD_F_PRIO_WR)? d->aplay[chan] : &d->fakechan; 61 d->fakechan.flags |= CHN_F_BUSY; 62 } else { 63 *rdch = d->arec[chan]; 64 *wrch = d->aplay[chan]; 65 } 66 return 0; 67} 68 69static void 70setchns(snddev_info *d, int chan) 71{ 72 KASSERT((d->flags & SD_F_PRIO_SET) != SD_F_PRIO_SET, \ 73 ("getchns: read and write both prioritised")); 74 d->flags |= SD_F_DIR_SET; 75 if (d->swap) d->swap(d->devinfo, (d->flags & SD_F_PRIO_WR)? PCMDIR_PLAY : PCMDIR_REC); 76} 77 78int 79dsp_open(snddev_info *d, int chan, int oflags, int devtype) 80{ 81 pcm_channel *rdch, *wrch; 82 u_int32_t fmt; 83 84 if (chan >= d->chancount) return ENODEV; 85 if ((d->flags & SD_F_SIMPLEX) && (d->ref[chan] > 0)) return EBUSY; 86 rdch = d->arec[chan]; 87 wrch = d->aplay[chan]; 88 if (oflags & FREAD) { 89 if (rdch == NULL) { 90 rdch = allocchn(d, PCMDIR_REC); 91 if (!rdch) return EBUSY; 92 } else return EBUSY; 93 } 94 if (oflags & FWRITE) { 95 if (wrch == NULL) { 96 wrch = allocchn(d, PCMDIR_PLAY); 97 if (!wrch) { 98 if (rdch && (oflags & FREAD)) 99 rdch->flags &= ~CHN_F_BUSY; 100 return EBUSY; 101 } 102 } else return EBUSY; 103 } 104 d->aplay[chan] = wrch; 105 d->arec[chan] = rdch; 106 d->ref[chan]++; 107 switch (devtype) { 108 case SND_DEV_DSP16: 109 fmt = AFMT_S16_LE; 110 break; 111 112 case SND_DEV_DSP: 113 fmt = AFMT_U8; 114 break; 115 116 case SND_DEV_AUDIO: 117 fmt = AFMT_MU_LAW; 118 break; 119 120 case SND_DEV_NORESET: 121 fmt = 0; 122 break; 123 124 default: 125 return ENXIO; 126 } 127 128 if (rdch && (oflags & FREAD)) { 129 chn_reset(rdch, fmt); 130 if (oflags & O_NONBLOCK) rdch->flags |= CHN_F_NBIO; 131 } 132 if (wrch && (oflags & FWRITE)) { 133 chn_reset(wrch, fmt); 134 if (oflags & O_NONBLOCK) wrch->flags |= CHN_F_NBIO; 135 } 136 return 0; 137} 138 139int 140dsp_close(snddev_info *d, int chan, int devtype) 141{ 142 pcm_channel *rdch, *wrch; 143 144#if 0 145 /* enable this if/when every close() is propagated here */ 146 d->ref[chan]--; 147 if (d->ref[chan]) return 0; 148#endif 149 d->flags &= ~SD_F_TRANSIENT; 150 rdch = d->arec[chan]; 151 wrch = d->aplay[chan]; 152 153 if (rdch) { 154 chn_abort(rdch); 155 rdch->flags &= ~(CHN_F_BUSY | CHN_F_RUNNING | CHN_F_MAPPED); 156 chn_reset(rdch, 0); 157 } 158 if (wrch) { 159 chn_flush(wrch); 160 wrch->flags &= ~(CHN_F_BUSY | CHN_F_RUNNING | CHN_F_MAPPED); 161 chn_reset(wrch, 0); 162 } 163 d->aplay[chan] = NULL; 164 d->arec[chan] = NULL; 165 return 0; 166} 167 168int 169dsp_read(snddev_info *d, int chan, struct uio *buf, int flag) 170{ 171 pcm_channel *rdch, *wrch; 172 173 if (!(d->flags & SD_F_PRIO_SET)) d->flags |= SD_F_PRIO_RD; 174 if (!(d->flags & SD_F_DIR_SET)) setchns(d, chan); 175 getchns(d, chan, &rdch, &wrch); 176 KASSERT(rdch, ("dsp_read: nonexistant channel")); 177 KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel")); 178 if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) return EINVAL; 179 if (!(rdch->flags & CHN_F_RUNNING)) 180 rdch->flags |= CHN_F_RUNNING; 181 return chn_read(rdch, buf); 182} 183 184int 185dsp_write(snddev_info *d, int chan, struct uio *buf, int flag) 186{ 187 pcm_channel *rdch, *wrch; 188 189 if (!(d->flags & SD_F_PRIO_SET)) d->flags |= SD_F_PRIO_WR; 190 if (!(d->flags & SD_F_DIR_SET)) setchns(d, chan); 191 getchns(d, chan, &rdch, &wrch); 192 KASSERT(wrch, ("dsp_write: nonexistant channel")); 193 KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel")); 194 if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) return EINVAL; 195 if (!(wrch->flags & CHN_F_RUNNING)) 196 wrch->flags |= CHN_F_RUNNING; 197 return chn_write(wrch, buf); 198} 199 200int 201dsp_ioctl(snddev_info *d, int chan, u_long cmd, caddr_t arg) 202{ 203 int ret = 0, *arg_i = (int *)arg; 204 u_long s; 205 pcm_channel *wrch = NULL, *rdch = NULL; 206 207 rdch = d->arec[chan]; 208 wrch = d->aplay[chan]; 209 210 if (rdch && (rdch->flags & CHN_F_DEAD)) 211 rdch = NULL; 212 if (wrch && (wrch->flags & CHN_F_DEAD)) 213 wrch = NULL; 214 if (!(rdch || wrch)) 215 return EINVAL; 216 /* 217 * all routines are called with int. blocked. Make sure that 218 * ints are re-enabled when calling slow or blocking functions! 219 */ 220 s = spltty(); 221 switch(cmd) { 222#ifdef OLDPCM_IOCTL 223 /* 224 * we start with the new ioctl interface. 225 */ 226 case AIONWRITE: /* how many bytes can write ? */ 227 if (wrch && wrch->buffer.dl) 228 while (chn_wrfeed(wrch) > 0); 229 *arg_i = wrch? wrch->buffer2nd.fl : 0; 230 break; 231 232 case AIOSSIZE: /* set the current blocksize */ 233 { 234 struct snd_size *p = (struct snd_size *)arg; 235 if (wrch) 236 chn_setblocksize(wrch, 2, p->play_size); 237 if (rdch) 238 chn_setblocksize(rdch, 2, p->rec_size); 239 } 240 /* FALLTHROUGH */ 241 case AIOGSIZE: /* get the current blocksize */ 242 { 243 struct snd_size *p = (struct snd_size *)arg; 244 if (wrch) p->play_size = wrch->buffer2nd.blksz; 245 if (rdch) p->rec_size = rdch->buffer2nd.blksz; 246 } 247 break; 248 249 case AIOSFMT: 250 { 251 snd_chan_param *p = (snd_chan_param *)arg; 252 if (wrch) { 253 chn_setformat(wrch, p->play_format); 254 chn_setspeed(wrch, p->play_rate); 255 } 256 if (rdch) { 257 chn_setformat(rdch, p->rec_format); 258 chn_setspeed(rdch, p->rec_rate); 259 } 260 } 261 /* FALLTHROUGH */ 262 263 case AIOGFMT: 264 { 265 snd_chan_param *p = (snd_chan_param *)arg; 266 p->play_rate = wrch? wrch->speed : 0; 267 p->rec_rate = rdch? rdch->speed : 0; 268 p->play_format = wrch? wrch->format : 0; 269 p->rec_format = rdch? rdch->format : 0; 270 } 271 break; 272 273 case AIOGCAP: /* get capabilities */ 274 { 275 snd_capabilities *p = (snd_capabilities *)arg; 276 pcmchan_caps *pcaps = NULL, *rcaps = NULL; 277 if (rdch) rcaps = chn_getcaps(rdch); 278 if (wrch) pcaps = chn_getcaps(wrch); 279 p->rate_min = max(rcaps? rcaps->minspeed : 0, 280 pcaps? pcaps->minspeed : 0); 281 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 282 pcaps? pcaps->maxspeed : 1000000); 283 p->bufsize = min(rdch? rdch->buffer2nd.bufsize : 1000000, 284 wrch? wrch->buffer2nd.bufsize : 1000000); 285 /* XXX bad on sb16 */ 286 p->formats = (rcaps? rcaps->formats : 0xffffffff) & 287 (pcaps? pcaps->formats : 0xffffffff); 288 if (rdch && wrch) 289 p->formats |= (d->flags & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; 290 p->mixers = 1; /* default: one mixer */ 291 p->inputs = d->mixer.devs; 292 p->left = p->right = 100; 293 } 294 break; 295 296 case AIOSTOP: 297 if (*arg_i == AIOSYNC_PLAY && wrch) *arg_i = chn_abort(wrch); 298 else if (*arg_i == AIOSYNC_CAPTURE && rdch) *arg_i = chn_abort(rdch); 299 else { 300 printf("AIOSTOP: bad channel 0x%x\n", *arg_i); 301 *arg_i = 0; 302 } 303 break; 304 305 case AIOSYNC: 306 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", 307 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); 308 break; 309#endif 310 /* 311 * here follow the standard ioctls (filio.h etc.) 312 */ 313 case FIONREAD: /* get # bytes to read */ 314 if (rdch && rdch->buffer.dl) 315 while (chn_rdfeed(rdch) > 0); 316 *arg_i = rdch? rdch->buffer2nd.rl : 0; 317 break; 318 319 case FIOASYNC: /*set/clear async i/o */ 320 DEB( printf("FIOASYNC\n") ; ) 321 break; 322 323 case SNDCTL_DSP_NONBLOCK: 324 case FIONBIO: /* set/clear non-blocking i/o */ 325 if (rdch) rdch->flags &= ~CHN_F_NBIO; 326 if (wrch) wrch->flags &= ~CHN_F_NBIO; 327 if (*arg_i) { 328 if (rdch) rdch->flags |= CHN_F_NBIO; 329 if (wrch) wrch->flags |= CHN_F_NBIO; 330 } 331 break; 332 333 /* 334 * Finally, here is the linux-compatible ioctl interface 335 */ 336#define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) 337 case THE_REAL_SNDCTL_DSP_GETBLKSIZE: 338 case SNDCTL_DSP_GETBLKSIZE: 339 if (wrch) 340 *arg_i = wrch->buffer2nd.blksz; 341 else if (rdch) 342 *arg_i = rdch->buffer2nd.blksz; 343 else 344 *arg_i = 0; 345 break ; 346 347 case SNDCTL_DSP_SETBLKSIZE: 348 RANGE(*arg_i, 16, 65536); 349 if (wrch) chn_setblocksize(wrch, 2, *arg_i); 350 if (rdch) chn_setblocksize(rdch, 2, *arg_i); 351 break; 352 353 case SNDCTL_DSP_RESET: 354 DEB(printf("dsp reset\n")); 355 splx(s); 356 if (wrch) chn_abort(wrch); 357 if (rdch) chn_abort(rdch); 358 break; 359 360 case SNDCTL_DSP_SYNC: 361 DEB(printf("dsp sync\n")); 362 splx(s); 363 if (wrch) chn_sync(wrch, wrch->buffer2nd.bufsize - 4); 364 break; 365 366 case SNDCTL_DSP_SPEED: 367 splx(s); 368 if (wrch) 369 ret = chn_setspeed(wrch, *arg_i); 370 if (rdch && ret == 0) 371 ret = chn_setspeed(rdch, *arg_i); 372 /* fallthru */ 373 374 case SOUND_PCM_READ_RATE: 375 *arg_i = wrch? wrch->speed : rdch->speed; 376 break; 377 378 case SNDCTL_DSP_STEREO: 379 splx(s); 380 if (wrch) 381 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | 382 ((*arg_i)? AFMT_STEREO : 0)); 383 if (rdch && ret == 0) 384 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | 385 ((*arg_i)? AFMT_STEREO : 0)); 386 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 1 : 0; 387 break; 388 389 case SOUND_PCM_WRITE_CHANNELS: 390/* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 391 splx(s); 392 if (*arg_i == 1 || *arg_i == 2) { 393 if (wrch) 394 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | 395 ((*arg_i == 2)? AFMT_STEREO : 0)); 396 if (rdch && ret == 0) 397 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | 398 ((*arg_i == 2)? AFMT_STEREO : 0)); 399 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; 400 } else 401 *arg_i = 0; 402 break; 403 404 case SOUND_PCM_READ_CHANNELS: 405 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; 406 break; 407 408 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 409 *arg_i = wrch? chn_getcaps(wrch)->formats : chn_getcaps(rdch)->formats; 410 break ; 411 412 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 413 splx(s); 414 if (wrch) 415 ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO)); 416 if (rdch && ret == 0) 417 ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO)); 418 *arg_i = (wrch? wrch->format: rdch->format) & ~AFMT_STEREO; 419 break; 420 421 case SNDCTL_DSP_SUBDIVIDE: 422 /* XXX watch out, this is RW! */ 423 printf("SNDCTL_DSP_SUBDIVIDE unimplemented\n"); 424 break; 425 426 case SNDCTL_DSP_SETFRAGMENT: 427 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 428 { 429 pcm_channel *c = wrch? wrch : rdch; 430 u_int32_t fragln = (*arg_i) & 0x0000ffff; 431 u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 432 u_int32_t fragsz; 433 434 RANGE(fragln, 4, 16); 435 fragsz = 1 << fragln; 436 437 if (maxfrags == 0) 438 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 439 if (maxfrags < 2) { 440 ret = EINVAL; 441 break; 442 } 443 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 444 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 445 446 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 447 if (rdch) 448 ret = chn_setblocksize(rdch, maxfrags, fragsz); 449 if (wrch && ret == 0) 450 ret = chn_setblocksize(wrch, maxfrags, fragsz); 451 452 fragsz = c->buffer2nd.blksz; 453 fragln = 0; 454 while (fragsz > 1) { 455 fragln++; 456 fragsz >>= 1; 457 } 458 *arg_i = (c->buffer2nd.blkcnt << 16) | fragln; 459 } 460 break; 461 462 case SNDCTL_DSP_GETISPACE: /* XXX Space for reading? Makes no sense... */ 463 /* return the size of data available in the input queue */ 464 { 465 audio_buf_info *a = (audio_buf_info *)arg; 466 if (rdch) { 467 snd_dbuf *b = &rdch->buffer; 468 snd_dbuf *bs = &rdch->buffer2nd; 469 if (b->dl && !(rdch->flags & CHN_F_MAPPED)) 470 /* 471 * Suck up the secondary and DMA buffer. 472 * chn_rdfeed*() takes care of the alignment. 473 */ 474 while (chn_rdfeed(rdch) > 0); 475 a->bytes = bs->rl; 476 a->fragments = a->bytes / rdch->buffer2nd.blksz; 477 a->fragstotal = rdch->buffer2nd.blkcnt; 478 a->fragsize = rdch->buffer2nd.blksz; 479 } 480 } 481 break; 482 483 case SNDCTL_DSP_GETOSPACE: 484 /* return space available in the output queue */ 485 { 486 audio_buf_info *a = (audio_buf_info *)arg; 487 if (wrch) { 488 snd_dbuf *b = &wrch->buffer; 489 snd_dbuf *bs = &wrch->buffer2nd; 490 if (b->dl && !(wrch->flags & CHN_F_MAPPED)) { 491 /* 492 * Fill up the secondary and DMA buffer. 493 * chn_wrfeed*() takes care of the alignment. 494 * Check for underflow before writing into the buffers. 495 */ 496 chn_checkunderflow(wrch); 497 while (chn_wrfeed(wrch) > 0); 498 } 499 a->bytes = bs->fl; 500 a->fragments = a->bytes / wrch->buffer2nd.blksz; 501 a->fragstotal = wrch->buffer2nd.blkcnt; 502 a->fragsize = wrch->buffer2nd.blksz; 503 } 504 } 505 break; 506 507 case SNDCTL_DSP_GETIPTR: 508 { 509 count_info *a = (count_info *)arg; 510 if (rdch) { 511 snd_dbuf *b = &rdch->buffer; 512 snd_dbuf *bs = &rdch->buffer2nd; 513 if (b->dl && !(rdch->flags & CHN_F_MAPPED)) 514 /* 515 * Suck up the secondary and DMA buffer. 516 * chn_rdfeed*() takes care of the alignment. 517 */ 518 while (chn_rdfeed(rdch) > 0); 519 a->bytes = bs->total; 520 a->blocks = rdch->blocks; 521 a->ptr = bs->rp; 522 rdch->blocks = 0; 523 } else ret = EINVAL; 524 } 525 break; 526 527 case SNDCTL_DSP_GETOPTR: 528 { 529 count_info *a = (count_info *)arg; 530 if (wrch) { 531 snd_dbuf *b = &wrch->buffer; 532 snd_dbuf *bs = &wrch->buffer2nd; 533 if (b->dl && !(wrch->flags & CHN_F_MAPPED)) { 534 /* 535 * Fill up the secondary and DMA buffer. 536 * chn_wrfeed*() takes care of the alignment. 537 * Check for underflow before writing into the buffers. 538 */ 539 chn_checkunderflow(wrch); 540 while (chn_wrfeed(wrch) > 0); 541 } 542 a->bytes = bs->total; 543 a->blocks = wrch->blocks; 544 a->ptr = bs->rp; 545 wrch->blocks = 0; 546 } else ret = EINVAL; 547 } 548 break; 549 550 case SNDCTL_DSP_GETCAPS: 551 *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER; 552 if (rdch && wrch && !(d->flags & SD_F_SIMPLEX)) 553 *arg_i |= DSP_CAP_DUPLEX; 554 break; 555 556 case SOUND_PCM_READ_BITS: 557 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_16BIT)? 16 : 8; 558 break; 559 560 case SNDCTL_DSP_SETTRIGGER: 561 if (rdch) { 562 rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 563 if (*arg_i & PCM_ENABLE_INPUT) 564 rdch->flags |= CHN_F_TRIGGERED; 565 else 566 rdch->flags |= CHN_F_NOTRIGGER; 567 chn_intr(rdch); 568 } 569 if (wrch) { 570 wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 571 if (*arg_i & PCM_ENABLE_OUTPUT) 572 wrch->flags |= CHN_F_TRIGGERED; 573 else 574 wrch->flags |= CHN_F_NOTRIGGER; 575 chn_intr(wrch); 576 } 577 break; 578 579 case SNDCTL_DSP_GETTRIGGER: 580 *arg_i = 0; 581 if (wrch && wrch->flags & CHN_F_TRIGGERED) 582 *arg_i |= PCM_ENABLE_OUTPUT; 583 if (rdch && rdch->flags & CHN_F_TRIGGERED) 584 *arg_i |= PCM_ENABLE_INPUT; 585 break; 586 587 case SNDCTL_DSP_GETODELAY: 588 if (wrch) { 589 snd_dbuf *b = &wrch->buffer; 590 if (b->dl) { 591 chn_checkunderflow(wrch); 592 if (!(wrch->flags & CHN_F_MAPPED)) 593 while (chn_wrfeed(wrch) > 0); 594 } 595 *arg = b->total; 596 } else 597 ret = EINVAL; 598 break; 599 600 case SNDCTL_DSP_MAPINBUF: 601 case SNDCTL_DSP_MAPOUTBUF: 602 case SNDCTL_DSP_SETSYNCRO: 603 /* undocumented */ 604 605 case SNDCTL_DSP_POST: 606 case SOUND_PCM_WRITE_FILTER: 607 case SOUND_PCM_READ_FILTER: 608 /* dunno what these do, don't sound important */ 609 default: 610 DEB(printf("default ioctl chan%d fn 0x%08lx fail\n", chan, cmd)); 611 ret = EINVAL; 612 break; 613 } 614 splx(s); 615 return ret; 616} 617 618int 619dsp_poll(snddev_info *d, int chan, int events, struct proc *p) 620{ 621 int ret = 0, e; 622 pcm_channel *wrch = NULL, *rdch = NULL; 623 624 getchns(d, chan, &rdch, &wrch); 625 e = events & (POLLOUT | POLLWRNORM); 626 if (wrch && e) ret |= chn_poll(wrch, e, p); 627 e = events & (POLLIN | POLLRDNORM); 628 if (rdch && e) ret |= chn_poll(rdch, e, p); 629 return ret; 630} 631 632int 633dsp_mmap(snddev_info *d, int chan, vm_offset_t offset, int nprot) 634{ 635 pcm_channel *wrch = NULL, *rdch = NULL, *c = NULL; 636 637 getchns(d, chan, &rdch, &wrch); 638 /* XXX this is broken by line 204 of vm/device_pager.c, so force write buffer */ 639 if (1 || (wrch && (nprot & PROT_WRITE))) 640 c = wrch; 641 else if (rdch && (nprot & PROT_READ)) 642 c = rdch; 643 if (c && (c->format == c->buffer.fmt)) { 644 c->flags |= CHN_F_MAPPED; 645 return atop(vtophys(c->buffer2nd.buf + offset)); 646 } else 647 return -1; 648} 649 650