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) p->play_size = wrch->buffer2nd.blksz; 244 if (rdch) p->rec_size = rdch->buffer2nd.blksz; 245 } 246 break; 247 248 case AIOSFMT: 249 { 250 snd_chan_param *p = (snd_chan_param *)arg; 251 if (wrch) { 252 chn_setformat(wrch, p->play_format); 253 chn_setspeed(wrch, p->play_rate); 254 } 255 if (rdch) { 256 chn_setformat(rdch, p->rec_format); 257 chn_setspeed(rdch, p->rec_rate); 258 } 259 } 260 /* FALLTHROUGH */ 261 262 case AIOGFMT: 263 { 264 snd_chan_param *p = (snd_chan_param *)arg; 265 p->play_rate = wrch? wrch->speed : 0; 266 p->rec_rate = rdch? rdch->speed : 0; 267 p->play_format = wrch? wrch->format : 0; 268 p->rec_format = rdch? rdch->format : 0; 269 } 270 break; 271 272 case AIOGCAP: /* get capabilities */ 273 { 274 snd_capabilities *p = (snd_capabilities *)arg; 275 pcmchan_caps *pcaps = NULL, *rcaps = NULL; 276 if (rdch) rcaps = chn_getcaps(rdch); 277 if (wrch) pcaps = chn_getcaps(wrch); 278 p->rate_min = max(rcaps? rcaps->minspeed : 0, 279 pcaps? pcaps->minspeed : 0); 280 p->rate_max = min(rcaps? rcaps->maxspeed : 1000000, 281 pcaps? pcaps->maxspeed : 1000000); 282 p->bufsize = min(rdch? rdch->buffer2nd.bufsize : 1000000, 283 wrch? wrch->buffer2nd.bufsize : 1000000); 284 /* XXX bad on sb16 */ 285 p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) & 286 (wrch? chn_getformats(wrch) : 0xffffffff); 287 if (rdch && wrch) 288 p->formats |= (d->flags & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX; 289 p->mixers = 1; /* default: one mixer */ 290 p->inputs = d->mixer->devs; 291 p->left = p->right = 100; 292 } 293 break; 294 295 case AIOSTOP: 296 if (*arg_i == AIOSYNC_PLAY && wrch) *arg_i = chn_abort(wrch); 297 else if (*arg_i == AIOSYNC_CAPTURE && rdch) *arg_i = chn_abort(rdch); 298 else { 299 printf("AIOSTOP: bad channel 0x%x\n", *arg_i); 300 *arg_i = 0; 301 } 302 break; 303 304 case AIOSYNC: 305 printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n", 306 ((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos); 307 break; 308 #endif 309 /* 310 * here follow the standard ioctls (filio.h etc.) 311 */ 312 case FIONREAD: /* get # bytes to read */ 313 if (rdch && rdch->buffer.dl) 314 while (chn_rdfeed(rdch) > 0); 315 *arg_i = rdch? rdch->buffer2nd.rl : 0; 316 break; 317 318 case FIOASYNC: /*set/clear async i/o */ 319 DEB( printf("FIOASYNC\n") ; ) 320 break; 321 322 case SNDCTL_DSP_NONBLOCK: 323 case FIONBIO: /* set/clear non-blocking i/o */ 324 if (rdch) rdch->flags &= ~CHN_F_NBIO; 325 if (wrch) wrch->flags &= ~CHN_F_NBIO; 326 if (*arg_i) { 327 if (rdch) rdch->flags |= CHN_F_NBIO; 328 if (wrch) wrch->flags |= CHN_F_NBIO; 329 } 330 break; 331 332 /* 333 * Finally, here is the linux-compatible ioctl interface 334 */ 335 #define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int) 336 case THE_REAL_SNDCTL_DSP_GETBLKSIZE: 337 case SNDCTL_DSP_GETBLKSIZE: 338 if (wrch) 339 *arg_i = wrch->buffer2nd.blksz; 340 else if (rdch) 341 *arg_i = rdch->buffer2nd.blksz; 342 else 343 *arg_i = 0; 344 break ; 345 346 case SNDCTL_DSP_SETBLKSIZE: 347 RANGE(*arg_i, 16, 65536); 348 if (wrch) chn_setblocksize(wrch, 2, *arg_i); 349 if (rdch) chn_setblocksize(rdch, 2, *arg_i); 350 break; 351 352 case SNDCTL_DSP_RESET: 353 DEB(printf("dsp reset\n")); 354 splx(s); 355 if (wrch) chn_abort(wrch); 356 if (rdch) chn_abort(rdch); 357 break; 358 359 case SNDCTL_DSP_SYNC: 360 DEB(printf("dsp sync\n")); 361 splx(s); 362 if (wrch) chn_sync(wrch, wrch->buffer2nd.bufsize - 4); 363 break; 364 365 case SNDCTL_DSP_SPEED: 366 splx(s); 367 if (wrch) 368 ret = chn_setspeed(wrch, *arg_i); 369 if (rdch && ret == 0) 370 ret = chn_setspeed(rdch, *arg_i); 371 /* fallthru */ 372 373 case SOUND_PCM_READ_RATE: 374 *arg_i = wrch? wrch->speed : rdch->speed; 375 break; 376 377 case SNDCTL_DSP_STEREO: 378 splx(s); 379 if (wrch) 380 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | 381 ((*arg_i)? AFMT_STEREO : 0)); 382 if (rdch && ret == 0) 383 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | 384 ((*arg_i)? AFMT_STEREO : 0)); 385 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 1 : 0; 386 break; 387 388 case SOUND_PCM_WRITE_CHANNELS: 389 /* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */ 390 splx(s); 391 if (*arg_i == 1 || *arg_i == 2) { 392 if (wrch) 393 ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) | 394 ((*arg_i == 2)? AFMT_STEREO : 0)); 395 if (rdch && ret == 0) 396 ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) | 397 ((*arg_i == 2)? AFMT_STEREO : 0)); 398 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; 399 } else 400 *arg_i = 0; 401 break; 402 403 case SOUND_PCM_READ_CHANNELS: 404 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1; 405 break; 406 407 case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */ 408 *arg_i = wrch? chn_getformats(wrch) : chn_getformats(rdch); 409 break ; 410 411 case SNDCTL_DSP_SETFMT: /* sets _one_ format */ 412 splx(s); 413 if ((*arg_i != AFMT_QUERY)) { 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 } 419 *arg_i = (wrch? wrch->format : rdch->format) & ~AFMT_STEREO; 420 break; 421 422 case SNDCTL_DSP_SUBDIVIDE: 423 /* XXX watch out, this is RW! */ 424 printf("SNDCTL_DSP_SUBDIVIDE unimplemented\n"); 425 break; 426 427 case SNDCTL_DSP_SETFRAGMENT: 428 DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg)); 429 { 430 pcm_channel *c = wrch? wrch : rdch; 431 u_int32_t fragln = (*arg_i) & 0x0000ffff; 432 u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16; 433 u_int32_t fragsz; 434 435 RANGE(fragln, 4, 16); 436 fragsz = 1 << fragln; 437 438 if (maxfrags == 0) 439 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 440 if (maxfrags < 2) { 441 ret = EINVAL; 442 break; 443 } 444 if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE) 445 maxfrags = CHN_2NDBUFMAXSIZE / fragsz; 446 447 DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz)); 448 if (rdch) 449 ret = chn_setblocksize(rdch, maxfrags, fragsz); 450 if (wrch && ret == 0) 451 ret = chn_setblocksize(wrch, maxfrags, fragsz); 452 453 fragsz = c->buffer2nd.blksz; 454 fragln = 0; 455 while (fragsz > 1) { 456 fragln++; 457 fragsz >>= 1; 458 } 459 *arg_i = (c->buffer2nd.blkcnt << 16) | fragln; 460 } 461 break; 462 463 case SNDCTL_DSP_GETISPACE: /* XXX Space for reading? Makes no sense... */ 464 /* return the size of data available in the input queue */ 465 { 466 audio_buf_info *a = (audio_buf_info *)arg; 467 if (rdch) { 468 snd_dbuf *b = &rdch->buffer; 469 snd_dbuf *bs = &rdch->buffer2nd; 470 if (b->dl && !(rdch->flags & CHN_F_MAPPED)) 471 /* 472 * Suck up the secondary and DMA buffer. 473 * chn_rdfeed*() takes care of the alignment. 474 */ 475 while (chn_rdfeed(rdch) > 0); 476 a->bytes = bs->rl; 477 a->fragments = a->bytes / rdch->buffer2nd.blksz; 478 a->fragstotal = rdch->buffer2nd.blkcnt; 479 a->fragsize = rdch->buffer2nd.blksz; 480 } 481 } 482 break; 483 484 case SNDCTL_DSP_GETOSPACE: 485 /* return space available in the output queue */ 486 { 487 audio_buf_info *a = (audio_buf_info *)arg; 488 if (wrch) { 489 snd_dbuf *b = &wrch->buffer; 490 snd_dbuf *bs = &wrch->buffer2nd; 491 if (b->dl && !(wrch->flags & CHN_F_MAPPED)) { 492 /* 493 * Fill up the secondary and DMA buffer. 494 * chn_wrfeed*() takes care of the alignment. 495 * Check for underflow before writing into the buffers. 496 */ 497 chn_checkunderflow(wrch); 498 while (chn_wrfeed(wrch) > 0); 499 } 500 a->bytes = bs->fl; 501 a->fragments = a->bytes / wrch->buffer2nd.blksz; 502 a->fragstotal = wrch->buffer2nd.blkcnt; 503 a->fragsize = wrch->buffer2nd.blksz; 504 } 505 } 506 break; 507 508 case SNDCTL_DSP_GETIPTR: 509 { 510 count_info *a = (count_info *)arg; 511 if (rdch) { 512 snd_dbuf *b = &rdch->buffer; 513 snd_dbuf *bs = &rdch->buffer2nd; 514 if (b->dl && !(rdch->flags & CHN_F_MAPPED)) 515 /* 516 * Suck up the secondary and DMA buffer. 517 * chn_rdfeed*() takes care of the alignment. 518 */ 519 while (chn_rdfeed(rdch) > 0); 520 a->bytes = bs->total; 521 a->blocks = rdch->blocks; 522 a->ptr = bs->rp; 523 rdch->blocks = 0; 524 } else ret = EINVAL; 525 } 526 break; 527 528 case SNDCTL_DSP_GETOPTR: 529 { 530 count_info *a = (count_info *)arg; 531 if (wrch) { 532 snd_dbuf *b = &wrch->buffer; 533 snd_dbuf *bs = &wrch->buffer2nd; 534 if (b->dl && !(wrch->flags & CHN_F_MAPPED)) { 535 /* 536 * Fill up the secondary and DMA buffer. 537 * chn_wrfeed*() takes care of the alignment. 538 * Check for underflow before writing into the buffers. 539 */ 540 chn_checkunderflow(wrch); 541 while (chn_wrfeed(wrch) > 0); 542 } 543 a->bytes = bs->total; 544 a->blocks = wrch->blocks; 545 a->ptr = bs->rp; 546 wrch->blocks = 0; 547 } else ret = EINVAL; 548 } 549 break; 550 551 case SNDCTL_DSP_GETCAPS: 552 *arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER; 553 if (rdch && wrch && !(d->flags & SD_F_SIMPLEX)) 554 *arg_i |= DSP_CAP_DUPLEX; 555 break; 556 557 case SOUND_PCM_READ_BITS: 558 *arg_i = ((wrch? wrch->format : rdch->format) & AFMT_16BIT)? 16 : 8; 559 break; 560 561 case SNDCTL_DSP_SETTRIGGER: 562 if (rdch) { 563 rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 564 if (*arg_i & PCM_ENABLE_INPUT) 565 rdch->flags |= CHN_F_TRIGGERED; 566 else 567 rdch->flags |= CHN_F_NOTRIGGER; 568 chn_intr(rdch); 569 } 570 if (wrch) { 571 wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER); 572 if (*arg_i & PCM_ENABLE_OUTPUT) 573 wrch->flags |= CHN_F_TRIGGERED; 574 else 575 wrch->flags |= CHN_F_NOTRIGGER; 576 chn_intr(wrch); 577 } 578 break; 579 580 case SNDCTL_DSP_GETTRIGGER: 581 *arg_i = 0; 582 if (wrch && wrch->flags & CHN_F_TRIGGERED) 583 *arg_i |= PCM_ENABLE_OUTPUT; 584 if (rdch && rdch->flags & CHN_F_TRIGGERED) 585 *arg_i |= PCM_ENABLE_INPUT; 586 break; 587 588 case SNDCTL_DSP_GETODELAY: 589 if (wrch) { 590 snd_dbuf *b = &wrch->buffer; 591 snd_dbuf *bs = &wrch->buffer2nd; 592 if (b->dl) { 593 chn_checkunderflow(wrch); 594 if (!(wrch->flags & CHN_F_MAPPED)) 595 while (chn_wrfeed(wrch) > 0); 596 } 597 *arg_i = b->rl + bs->rl; 598 } else 599 ret = EINVAL; 600 break; 601 602 case SNDCTL_DSP_POST: 603 if (wrch) { 604 wrch->flags &= ~CHN_F_NOTRIGGER; 605 chn_start(wrch, 1); 606 } 607 break; 608 609 case SNDCTL_DSP_MAPINBUF: 610 case SNDCTL_DSP_MAPOUTBUF: 611 case SNDCTL_DSP_SETSYNCRO: 612 /* undocumented */ 613 614 case SOUND_PCM_WRITE_FILTER: 615 case SOUND_PCM_READ_FILTER: 616 /* dunno what these do, don't sound important */ 617 default: 618 DEB(printf("default ioctl chan%d fn 0x%08lx fail\n", chan, cmd)); 619 ret = EINVAL; 620 break; 621 } 622 splx(s); 623 return ret; 624 } 625 626 int 627 dsp_poll(snddev_info *d, int chan, int events, struct proc *p) 628 { 629 int ret = 0, e; 630 pcm_channel *wrch = NULL, *rdch = NULL; 631 632 getchns(d, chan, &rdch, &wrch); 633 e = events & (POLLOUT | POLLWRNORM); 634 if (wrch && e) ret |= chn_poll(wrch, e, p); 635 e = events & (POLLIN | POLLRDNORM); 636 if (rdch && e) ret |= chn_poll(rdch, e, p); 637 return ret; 638 } 639 640 int 641 dsp_mmap(snddev_info *d, int chan, vm_offset_t offset, int nprot) 642 { 643 pcm_channel *wrch = NULL, *rdch = NULL, *c = NULL; 644 645 getchns(d, chan, &rdch, &wrch); 646 /* XXX this is broken by line 204 of vm/device_pager.c, so force write buffer */ 647 if (1 || (wrch && (nprot & PROT_WRITE))) 648 c = wrch; 649 else if (rdch && (nprot & PROT_READ)) 650 c = rdch; 651 if (c && (c->format == c->buffer.fmt)) { 652 c->flags |= CHN_F_MAPPED; 653 return atop(vtophys(c->buffer2nd.buf + offset)); 654 } else 655 return -1; 656 } 657 658