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 * $FreeBSD$ 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 36 static int getchns(snddev_info *d, int chan, pcm_channel **rdch, pcm_channel **wrch); 37 38 static pcm_channel * 39 allocchn(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 52 static int 53 getchns(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 69 static void 70 setchns(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 } 76 77 int 78 dsp_open(snddev_info *d, int chan, int oflags, int devtype) 79 { 80 pcm_channel *rdch, *wrch; 81 u_int32_t fmt; 82 83 if (chan >= d->chancount) return ENODEV; 84 if ((d->flags & SD_F_SIMPLEX) && (d->ref[chan] > 0)) return EBUSY; 85 rdch = d->arec[chan]; 86 wrch = d->aplay[chan]; 87 if (oflags & FREAD) { 88 if (rdch == NULL) { 89 rdch = allocchn(d, PCMDIR_REC); 90 if (!rdch) return EBUSY; 91 } else return EBUSY; 92 } 93 if (oflags & FWRITE) { 94 if (wrch == NULL) { 95 wrch = allocchn(d, PCMDIR_PLAY); 96 if (!wrch) { 97 if (rdch && (oflags & FREAD)) 98 rdch->flags &= ~CHN_F_BUSY; 99 return EBUSY; 100 } 101 } else return EBUSY; 102 } 103 d->aplay[chan] = wrch; 104 d->arec[chan] = rdch; 105 d->ref[chan]++; 106 switch (devtype) { 107 case SND_DEV_DSP16: 108 fmt = AFMT_S16_LE; 109 break; 110 111 case SND_DEV_DSP: 112 fmt = AFMT_U8; 113 break; 114 115 case SND_DEV_AUDIO: 116 fmt = AFMT_MU_LAW; 117 break; 118 119 case SND_DEV_NORESET: 120 fmt = 0; 121 break; 122 123 default: 124 return ENXIO; 125 } 126 127 if (rdch && (oflags & FREAD)) { 128 chn_reset(rdch, fmt); 129 if (oflags & O_NONBLOCK) rdch->flags |= CHN_F_NBIO; 130 } 131 if (wrch && (oflags & FWRITE)) { 132 chn_reset(wrch, fmt); 133 if (oflags & O_NONBLOCK) wrch->flags |= CHN_F_NBIO; 134 } 135 return 0; 136 } 137 138 int 139 dsp_close(snddev_info *d, int chan, int devtype) 140 { 141 pcm_channel *rdch, *wrch; 142 143 d->ref[chan] = 0; 144 #if 0 145 /* enable this if/when every close() is propagated here */ 146 if (d->ref[chan]) return 0; 147 #endif 148 d->flags &= ~SD_F_TRANSIENT; 149 rdch = d->arec[chan]; 150 wrch = d->aplay[chan]; 151 152 if (rdch) { 153 chn_abort(rdch); 154 rdch->flags &= ~(CHN_F_BUSY | CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 155 chn_reset(rdch, 0); 156 } 157 if (wrch) { 158 chn_flush(wrch); 159 wrch->flags &= ~(CHN_F_BUSY | CHN_F_RUNNING | CHN_F_MAPPED | CHN_F_DEAD); 160 chn_reset(wrch, 0); 161 } 162 d->aplay[chan] = NULL; 163 d->arec[chan] = NULL; 164 return 0; 165 } 166 167 int 168 dsp_read(snddev_info *d, int chan, struct uio *buf, int flag) 169 { 170 pcm_channel *rdch, *wrch; 171 172 if (!(d->flags & SD_F_PRIO_SET)) d->flags |= SD_F_PRIO_RD; 173 if (!(d->flags & SD_F_DIR_SET)) setchns(d, chan); 174 getchns(d, chan, &rdch, &wrch); 175 KASSERT(rdch, ("dsp_read: nonexistant channel")); 176 KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel")); 177 if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) return EINVAL; 178 if (!(rdch->flags & CHN_F_RUNNING)) 179 rdch->flags |= CHN_F_RUNNING; 180 return chn_read(rdch, buf); 181 } 182 183 int 184 dsp_write(snddev_info *d, int chan, struct uio *buf, int flag) 185 { 186 pcm_channel *rdch, *wrch; 187 188 if (!(d->flags & SD_F_PRIO_SET)) d->flags |= SD_F_PRIO_WR; 189 if (!(d->flags & SD_F_DIR_SET)) setchns(d, chan); 190 getchns(d, chan, &rdch, &wrch); 191 KASSERT(wrch, ("dsp_write: nonexistant channel")); 192 KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel")); 193 if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) return EINVAL; 194 if (!(wrch->flags & CHN_F_RUNNING)) 195 wrch->flags |= CHN_F_RUNNING; 196 return chn_write(wrch, buf); 197 } 198 199 int 200 dsp_ioctl(snddev_info *d, int chan, u_long cmd, caddr_t arg) 201 { 202 int ret = 0, *arg_i = (int *)arg; 203 u_long s; 204 pcm_channel *wrch = NULL, *rdch = NULL; 205 206 rdch = d->arec[chan]; 207 wrch = d->aplay[chan]; 208 209 if (rdch && (rdch->flags & CHN_F_DEAD)) 210 rdch = NULL; 211 if (wrch && (wrch->flags & CHN_F_DEAD)) 212 wrch = NULL; 213 if (!(rdch || wrch)) 214 return EINVAL; 215 /* 216 * all routines are called with int. blocked. Make sure that 217 * ints are re-enabled when calling slow or blocking functions! 218 */ 219 s = spltty(); 220 switch(cmd) { 221 #ifdef OLDPCM_IOCTL 222 /* 223 * we start with the new ioctl interface. 224 */ 225 case AIONWRITE: /* how many bytes can write ? */ 226 if (wrch && wrch->buffer.dl) 227 while (chn_wrfeed(wrch) > 0); 228 *arg_i = wrch? wrch->buffer2nd.fl : 0; 229 break; 230 231 case AIOSSIZE: /* set the current blocksize */ 232 { 233 struct snd_size *p = (struct snd_size *)arg; 234 if (wrch) 235 chn_setblocksize(wrch, 2, p->play_size); 236 if (rdch) 237 chn_setblocksize(rdch, 2, p->rec_size); 238 } 239 /* FALLTHROUGH */ 240 case AIOGSIZE: /* get the current blocksize */ 241 { 242 struct snd_size *p = (struct snd_size *)arg; 243 if (wrch) 244 p->play_size = wrch->buffer2nd.blksz; 245 if (rdch) 246 p->rec_size = rdch->buffer2nd.blksz; 247 } 248 break; 249 250 case AIOSFMT: 251 { 252 snd_chan_param *p = (snd_chan_param *)arg; 253 if (wrch) { 254 chn_setformat(wrch, p->play_format); 255 chn_setspeed(wrch, p->play_rate); 256 } 257 if (rdch) { 258 chn_setformat(rdch, p->rec_format); 259 chn_setspeed(rdch, p->rec_rate); 260 } 261 } 262 /* FALLTHROUGH */ 263 264 case AIOGFMT: 265 { 266 snd_chan_param *p = (snd_chan_param *)arg; 267 p->play_rate = wrch? wrch->speed : 0; 268 p->rec_rate = rdch? rdch->speed : 0; 269 p->play_format = wrch? wrch->format : 0; 270 p->rec_format = rdch? rdch->format : 0; 271 } 272 break; 273 274 case AIOGCAP: /* get capabilities */ 275 { 276 snd_capabilities *p = (snd_capabilities *)arg; 277 pcmchan_caps *pcaps = NULL, *rcaps = NULL; 278 if (rdch) rcaps = chn_getcaps(rdch); 279 if (wrch) pcaps = chn_getcaps(wrch); 280 p->rate_min = max(rcaps? rcaps->minspeed : 0, 281 pcaps? pcaps->minspeed : 0); 282 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 283 pcaps? pcaps->maxspeed : 1000000); 284 p->bufsize = min(rdch? rdch->buffer2nd.bufsize : 1000000, 285 wrch? wrch->buffer2nd.bufsize : 1000000); 286 /* XXX bad on sb16 */ 287 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & 288 (wrch? chn_getformats(wrch) : 0xffffffff); 289 if (rdch && wrch) 290 p->formats |= (d->flags & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; 291 p->mixers = 1; /* default: one mixer */ 292 p->inputs = mix_getdevs(d->mixer); 293 p->left = p->right = 100; 294 } 295 break; 296 297 case AIOSTOP: 298 if (*arg_i == AIOSYNC_PLAY && wrch) 299 *arg_i = chn_abort(wrch); 300 else if (*arg_i == AIOSYNC_CAPTURE && rdch) 301 *arg_i = chn_abort(rdch); 302 else { 303 printf("AIOSTOP: bad channel 0x%x\n", *arg_i); 304 *arg_i = 0; 305 } 306 break; 307 308 case AIOSYNC: 309 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", 310 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); 311 break; 312 #endif 313 /* 314 * here follow the standard ioctls (filio.h etc.) 315 */ 316 case FIONREAD: /* get # bytes to read */ 317 if (rdch && rdch->buffer.dl) 318 while (chn_rdfeed(rdch) > 0); 319 *arg_i = rdch? rdch->buffer2nd.rl : 0; 320 break; 321 322 case FIOASYNC: /*set/clear async i/o */ 323 DEB( printf("FIOASYNC\n") ; ) 324 break; 325 326 case SNDCTL_DSP_NONBLOCK: 327 case FIONBIO: /* set/clear non-blocking i/o */ 328 if (rdch) rdch->flags &= ~CHN_F_NBIO; 329 if (wrch) wrch->flags &= ~CHN_F_NBIO; 330 if (*arg_i) { 331 if (rdch) rdch->flags |= CHN_F_NBIO; 332 if (wrch) wrch->flags |= CHN_F_NBIO; 333 } 334 break; 335 336 /* 337 * Finally, here is the linux-compatible ioctl interface 338 */ 339 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) 340 case THE_REAL_SNDCTL_DSP_GETBLKSIZE: 341 case SNDCTL_DSP_GETBLKSIZE: 342 if (wrch) 343 *arg_i = wrch->buffer2nd.blksz; 344 else if (rdch) 345 *arg_i = rdch->buffer2nd.blksz; 346 else 347 *arg_i = 0; 348 break ; 349 350 case SNDCTL_DSP_SETBLKSIZE: 351 RANGE(*arg_i, 16, 65536); 352 if (wrch) chn_setblocksize(wrch, 2, *arg_i); 353 if (rdch) chn_setblocksize(rdch, 2, *arg_i); 354 break; 355 356 case SNDCTL_DSP_RESET: 357 DEB(printf("dsp reset\n")); 358 splx(s); 359 if (wrch) chn_abort(wrch); 360 if (rdch) chn_abort(rdch); 361 break; 362 363 case SNDCTL_DSP_SYNC: 364 DEB(printf("dsp sync\n")); 365 splx(s); 366 if (wrch) chn_sync(wrch, wrch->buffer2nd.bufsize - 4); 367 break; 368 369 case SNDCTL_DSP_SPEED: 370 splx(s); 371 if (wrch) 372 ret = chn_setspeed(wrch, *arg_i); 373 if (rdch && ret == 0) 374 ret = chn_setspeed(rdch, *arg_i); 375 /* fallthru */ 376 377 case SOUND_PCM_READ_RATE: 378 *arg_i = wrch? wrch->speed : rdch->speed; 379 break; 380 381 case SNDCTL_DSP_STEREO: 382 splx(s); 383 if (wrch) 384 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | 385 ((*arg_i)? AFMT_STEREO : 0)); 386 if (rdch && ret == 0) 387 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | 388 ((*arg_i)? AFMT_STEREO : 0)); 389 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 1 : 0; 390 break; 391 392 case SOUND_PCM_WRITE_CHANNELS: 393 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 394 splx(s); 395 if (*arg_i == 1 || *arg_i == 2) { 396 if (wrch) 397 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | 398 ((*arg_i == 2)? AFMT_STEREO : 0)); 399 if (rdch && ret == 0) 400 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | 401 ((*arg_i == 2)? AFMT_STEREO : 0)); 402 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; 403 } else 404 *arg_i = 0; 405 break; 406 407 case SOUND_PCM_READ_CHANNELS: 408 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; 409 break; 410 411 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 412 *arg_i = wrch? chn_getformats(wrch) : chn_getformats(rdch); 413 break ; 414 415 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 416 splx(s); 417 if ((*arg_i != AFMT_QUERY)) { 418 if (wrch) 419 ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO)); 420 if (rdch && ret == 0) 421 ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO)); 422 } 423 *arg_i = (wrch? wrch->format : rdch->format) & ~AFMT_STEREO; 424 break; 425 426 case SNDCTL_DSP_SUBDIVIDE: 427 /* XXX watch out, this is RW! */ 428 printf("SNDCTL_DSP_SUBDIVIDE unimplemented\n"); 429 break; 430 431 case SNDCTL_DSP_SETFRAGMENT: 432 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 433 { 434 pcm_channel *c = wrch? wrch : rdch; 435 u_int32_t fragln = (*arg_i) & 0x0000ffff; 436 u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 437 u_int32_t fragsz; 438 439 RANGE(fragln, 4, 16); 440 fragsz = 1 << fragln; 441 442 if (maxfrags == 0) 443 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 444 if (maxfrags < 2) { 445 ret = EINVAL; 446 break; 447 } 448 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 449 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 450 451 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 452 if (rdch) 453 ret = chn_setblocksize(rdch, maxfrags, fragsz); 454 if (wrch && ret == 0) 455 ret = chn_setblocksize(wrch, maxfrags, fragsz); 456 457 fragsz = c->buffer2nd.blksz; 458 fragln = 0; 459 while (fragsz > 1) { 460 fragln++; 461 fragsz >>= 1; 462 } 463 *arg_i = (c->buffer2nd.blkcnt << 16) | fragln; 464 } 465 break; 466 467 case SNDCTL_DSP_GETISPACE: /* XXX Space for reading? Makes no sense... */ 468 /* return the size of data available in the input queue */ 469 { 470 audio_buf_info *a = (audio_buf_info *)arg; 471 if (rdch) { 472 snd_dbuf *b = &rdch->buffer; 473 snd_dbuf *bs = &rdch->buffer2nd; 474 if (b->dl && !(rdch->flags & CHN_F_MAPPED)) 475 /* 476 * Suck up the secondary and DMA buffer. 477 * chn_rdfeed*() takes care of the alignment. 478 */ 479 while (chn_rdfeed(rdch) > 0); 480 a->bytes = bs->rl; 481 a->fragments = a->bytes / rdch->buffer2nd.blksz; 482 a->fragstotal = rdch->buffer2nd.blkcnt; 483 a->fragsize = rdch->buffer2nd.blksz; 484 } 485 } 486 break; 487 488 case SNDCTL_DSP_GETOSPACE: 489 /* return space available in the output queue */ 490 { 491 audio_buf_info *a = (audio_buf_info *)arg; 492 if (wrch) { 493 snd_dbuf *b = &wrch->buffer; 494 snd_dbuf *bs = &wrch->buffer2nd; 495 if (b->dl && !(wrch->flags & CHN_F_MAPPED)) { 496 /* 497 * Fill up the secondary and DMA buffer. 498 * chn_wrfeed*() takes care of the alignment. 499 * Check for underflow before writing into the buffers. 500 */ 501 chn_checkunderflow(wrch); 502 while (chn_wrfeed(wrch) > 0); 503 } 504 a->bytes = bs->fl; 505 a->fragments = a->bytes / wrch->buffer2nd.blksz; 506 a->fragstotal = wrch->buffer2nd.blkcnt; 507 a->fragsize = wrch->buffer2nd.blksz; 508 } 509 } 510 break; 511 512 case SNDCTL_DSP_GETIPTR: 513 { 514 count_info *a = (count_info *)arg; 515 if (rdch) { 516 snd_dbuf *b = &rdch->buffer; 517 snd_dbuf *bs = &rdch->buffer2nd; 518 if (b->dl && !(rdch->flags & CHN_F_MAPPED)) 519 /* 520 * Suck up the secondary and DMA buffer. 521 * chn_rdfeed*() takes care of the alignment. 522 */ 523 while (chn_rdfeed(rdch) > 0); 524 a->bytes = bs->total; 525 a->blocks = rdch->blocks; 526 a->ptr = bs->rp; 527 rdch->blocks = 0; 528 } else ret = EINVAL; 529 } 530 break; 531 532 case SNDCTL_DSP_GETOPTR: 533 { 534 count_info *a = (count_info *)arg; 535 if (wrch) { 536 snd_dbuf *b = &wrch->buffer; 537 snd_dbuf *bs = &wrch->buffer2nd; 538 if (b->dl && !(wrch->flags & CHN_F_MAPPED)) { 539 /* 540 * Fill up the secondary and DMA buffer. 541 * chn_wrfeed*() takes care of the alignment. 542 * Check for underflow before writing into the buffers. 543 */ 544 chn_checkunderflow(wrch); 545 while (chn_wrfeed(wrch) > 0); 546 } 547 a->bytes = bs->total; 548 a->blocks = wrch->blocks; 549 a->ptr = bs->rp; 550 wrch->blocks = 0; 551 } else ret = EINVAL; 552 } 553 break; 554 555 case SNDCTL_DSP_GETCAPS: 556 *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER; 557 if (rdch && wrch && !(d->flags & SD_F_SIMPLEX)) 558 *arg_i |= DSP_CAP_DUPLEX; 559 break; 560 561 case SOUND_PCM_READ_BITS: 562 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_16BIT)? 16 : 8; 563 break; 564 565 case SNDCTL_DSP_SETTRIGGER: 566 if (rdch) { 567 rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 568 if (*arg_i & PCM_ENABLE_INPUT) 569 rdch->flags |= CHN_F_TRIGGERED; 570 else 571 rdch->flags |= CHN_F_NOTRIGGER; 572 chn_intr(rdch); 573 } 574 if (wrch) { 575 wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 576 if (*arg_i & PCM_ENABLE_OUTPUT) 577 wrch->flags |= CHN_F_TRIGGERED; 578 else 579 wrch->flags |= CHN_F_NOTRIGGER; 580 chn_intr(wrch); 581 } 582 break; 583 584 case SNDCTL_DSP_GETTRIGGER: 585 *arg_i = 0; 586 if (wrch && wrch->flags & CHN_F_TRIGGERED) 587 *arg_i |= PCM_ENABLE_OUTPUT; 588 if (rdch && rdch->flags & CHN_F_TRIGGERED) 589 *arg_i |= PCM_ENABLE_INPUT; 590 break; 591 592 case SNDCTL_DSP_GETODELAY: 593 if (wrch) { 594 snd_dbuf *b = &wrch->buffer; 595 snd_dbuf *bs = &wrch->buffer2nd; 596 if (b->dl) { 597 chn_checkunderflow(wrch); 598 if (!(wrch->flags & CHN_F_MAPPED)) 599 while (chn_wrfeed(wrch) > 0); 600 } 601 *arg_i = b->rl + bs->rl; 602 } else 603 ret = EINVAL; 604 break; 605 606 case SNDCTL_DSP_POST: 607 if (wrch) { 608 wrch->flags &= ~CHN_F_NOTRIGGER; 609 chn_start(wrch, 1); 610 } 611 break; 612 613 case SNDCTL_DSP_MAPINBUF: 614 case SNDCTL_DSP_MAPOUTBUF: 615 case SNDCTL_DSP_SETSYNCRO: 616 /* undocumented */ 617 618 case SOUND_PCM_WRITE_FILTER: 619 case SOUND_PCM_READ_FILTER: 620 /* dunno what these do, don't sound important */ 621 default: 622 DEB(printf("default ioctl chan%d fn 0x%08lx fail\n", chan, cmd)); 623 ret = EINVAL; 624 break; 625 } 626 splx(s); 627 return ret; 628 } 629 630 int 631 dsp_poll(snddev_info *d, int chan, int events, struct proc *p) 632 { 633 int ret = 0, e; 634 pcm_channel *wrch = NULL, *rdch = NULL; 635 636 getchns(d, chan, &rdch, &wrch); 637 e = events & (POLLOUT | POLLWRNORM); 638 if (wrch && e) ret |= chn_poll(wrch, e, p); 639 e = events & (POLLIN | POLLRDNORM); 640 if (rdch && e) ret |= chn_poll(rdch, e, p); 641 return ret; 642 } 643 644 int 645 dsp_mmap(snddev_info *d, int chan, vm_offset_t offset, int nprot) 646 { 647 pcm_channel *wrch = NULL, *rdch = NULL, *c = NULL; 648 649 getchns(d, chan, &rdch, &wrch); 650 /* XXX this is broken by line 204 of vm/device_pager.c, so force write buffer */ 651 if (1 || (wrch && (nprot & PROT_WRITE))) 652 c = wrch; 653 else if (rdch && (nprot & PROT_READ)) 654 c = rdch; 655 if (c && (c->format == c->buffer.fmt)) { 656 c->flags |= CHN_F_MAPPED; 657 return atop(vtophys(c->buffer2nd.buf + offset)); 658 } else 659 return -1; 660 } 661 662