pad.c revision 1.28.4.1
1 /* $NetBSD: pad.c,v 1.28.4.1 2017/04/27 05:36:36 pgoyette Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: pad.c,v 1.28.4.1 2017/04/27 05:36:36 pgoyette Exp $"); 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/conf.h> 35 #include <sys/buf.h> 36 #include <sys/kmem.h> 37 #include <sys/kernel.h> 38 #include <sys/device.h> 39 #include <sys/proc.h> 40 #include <sys/condvar.h> 41 #include <sys/select.h> 42 #include <sys/audioio.h> 43 #include <sys/vnode.h> 44 #include <sys/module.h> 45 #include <sys/atomic.h> 46 #include <sys/time.h> 47 #include <sys/localcount.h> 48 49 #include <dev/audio_if.h> 50 #include <dev/audiovar.h> 51 #include <dev/auconv.h> 52 #include <dev/auvolconv.h> 53 54 #include <dev/pad/padvar.h> 55 56 #define PADUNIT(x) minor(x) 57 58 extern struct cfdriver pad_cd; 59 60 typedef struct pad_block { 61 uint8_t *pb_ptr; 62 int pb_len; 63 } pad_block_t; 64 65 enum { 66 PAD_OUTPUT_CLASS, 67 PAD_INPUT_CLASS, 68 PAD_OUTPUT_MASTER_VOLUME, 69 PAD_INPUT_DAC_VOLUME, 70 PAD_ENUM_LAST, 71 }; 72 73 static int pad_match(device_t, cfdata_t, void *); 74 static void pad_attach(device_t, device_t, void *); 75 static int pad_detach(device_t, int); 76 static void pad_childdet(device_t, device_t); 77 78 static int pad_audio_open(void *, int); 79 static int pad_query_encoding(void *, struct audio_encoding *); 80 static int pad_set_params(void *, int, int, 81 audio_params_t *, audio_params_t *, 82 stream_filter_list_t *, stream_filter_list_t *); 83 static int pad_start_output(void *, void *, int, 84 void (*)(void *), void *); 85 static int pad_start_input(void *, void *, int, 86 void (*)(void *), void *); 87 static int pad_halt_output(void *); 88 static int pad_halt_input(void *); 89 static int pad_getdev(void *, struct audio_device *); 90 static int pad_set_port(void *, mixer_ctrl_t *); 91 static int pad_get_port(void *, mixer_ctrl_t *); 92 static int pad_query_devinfo(void *, mixer_devinfo_t *); 93 static int pad_get_props(void *); 94 static int pad_round_blocksize(void *, int, int, const audio_params_t *); 95 static void pad_get_locks(void *, kmutex_t **, kmutex_t **); 96 97 static stream_filter_t *pad_swvol_filter_le(struct audio_softc *, 98 const audio_params_t *, const audio_params_t *); 99 static stream_filter_t *pad_swvol_filter_be(struct audio_softc *, 100 const audio_params_t *, const audio_params_t *); 101 static void pad_swvol_dtor(stream_filter_t *); 102 103 static const struct audio_hw_if pad_hw_if = { 104 .open = pad_audio_open, 105 .query_encoding = pad_query_encoding, 106 .set_params = pad_set_params, 107 .start_output = pad_start_output, 108 .start_input = pad_start_input, 109 .halt_output = pad_halt_output, 110 .halt_input = pad_halt_input, 111 .getdev = pad_getdev, 112 .set_port = pad_set_port, 113 .get_port = pad_get_port, 114 .query_devinfo = pad_query_devinfo, 115 .get_props = pad_get_props, 116 .round_blocksize = pad_round_blocksize, 117 .get_locks = pad_get_locks, 118 }; 119 120 #define PAD_NFORMATS 1 121 static const struct audio_format pad_formats[PAD_NFORMATS] = { 122 { NULL, AUMODE_PLAY|AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16, 123 2, AUFMT_STEREO, 1, { 44100 } }, 124 }; 125 126 extern void padattach(int); 127 128 static int pad_add_block(pad_softc_t *, uint8_t *, int); 129 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 130 131 dev_type_open(pad_open); 132 dev_type_close(pad_close); 133 dev_type_read(pad_read); 134 135 const struct cdevsw pad_cdevsw = { 136 DEVSW_MODULE_INIT 137 .d_open = pad_open, 138 .d_close = pad_close, 139 .d_read = pad_read, 140 .d_write = nowrite, 141 .d_ioctl = noioctl, 142 .d_stop = nostop, 143 .d_tty = notty, 144 .d_poll = nopoll, 145 .d_mmap = nommap, 146 .d_kqfilter = nokqfilter, 147 .d_discard = nodiscard, 148 .d_flag = D_OTHER | D_MPSAFE, 149 }; 150 151 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 152 NULL, NULL, pad_childdet); 153 154 void 155 padattach(int n) 156 { 157 int i, err; 158 cfdata_t cf; 159 160 aprint_debug("pad: requested %d units\n", n); 161 162 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 163 if (err) { 164 aprint_error("%s: couldn't register cfattach: %d\n", 165 pad_cd.cd_name, err); 166 config_cfdriver_detach(&pad_cd); 167 return; 168 } 169 170 for (i = 0; i < n; i++) { 171 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 172 if (cf == NULL) { 173 aprint_error("%s: couldn't allocate cfdata\n", 174 pad_cd.cd_name); 175 continue; 176 } 177 cf->cf_name = pad_cd.cd_name; 178 cf->cf_atname = pad_cd.cd_name; 179 cf->cf_unit = i; 180 cf->cf_fstate = FSTATE_STAR; 181 182 (void)config_attach_pseudo(cf); 183 } 184 185 return; 186 } 187 188 static int 189 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 190 { 191 int l; 192 193 if (sc->sc_open == 0) 194 return EIO; 195 196 KASSERT(mutex_owned(&sc->sc_lock)); 197 198 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 199 return ENOBUFS; 200 201 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 202 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 203 else { 204 l = PAD_BUFSIZE - sc->sc_wpos; 205 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 206 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 207 } 208 209 sc->sc_wpos += blksize; 210 if (sc->sc_wpos > PAD_BUFSIZE) 211 sc->sc_wpos -= PAD_BUFSIZE; 212 213 sc->sc_buflen += blksize; 214 215 return 0; 216 } 217 218 static int 219 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 220 { 221 int l; 222 223 KASSERT(mutex_owned(&sc->sc_lock)); 224 KASSERT(pb != NULL); 225 226 if (sc->sc_buflen < blksize) 227 return ERESTART; 228 229 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 230 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 231 pb->pb_len = blksize; 232 sc->sc_rpos += blksize; 233 } else { 234 l = PAD_BUFSIZE - sc->sc_rpos; 235 pb->pb_len = l; 236 sc->sc_rpos = 0; 237 } 238 sc->sc_buflen -= pb->pb_len; 239 240 return 0; 241 } 242 243 static int 244 pad_match(device_t parent, cfdata_t data, void *opaque) 245 { 246 247 return 1; 248 } 249 250 static void 251 pad_childdet(device_t self, device_t child) 252 { 253 pad_softc_t *sc = device_private(self); 254 255 sc->sc_audiodev = NULL; 256 } 257 258 static void 259 pad_attach(device_t parent, device_t self, void *opaque) 260 { 261 pad_softc_t *sc = device_private(self); 262 263 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 264 265 sc->sc_dev = self; 266 sc->sc_open = 0; 267 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 268 &sc->sc_encodings) != 0) { 269 aprint_error_dev(self, "couldn't create encodings\n"); 270 return; 271 } 272 273 cv_init(&sc->sc_condvar, device_xname(self)); 274 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 275 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 276 277 sc->sc_swvol = 255; 278 sc->sc_buflen = 0; 279 sc->sc_rpos = sc->sc_wpos = 0; 280 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 281 282 if (!pmf_device_register(self, NULL, NULL)) 283 aprint_error_dev(self, "couldn't establish power handler\n"); 284 285 return; 286 } 287 288 static int 289 pad_detach(device_t self, int flags) 290 { 291 pad_softc_t *sc = device_private(self); 292 int cmaj, mn, rc; 293 294 cmaj = cdevsw_lookup_major(&pad_cdevsw); 295 mn = device_unit(self); 296 vdevgone(cmaj, mn, mn, VCHR); 297 298 if ((rc = config_detach_children(self, flags)) != 0) 299 return rc; 300 301 pmf_device_deregister(self); 302 303 mutex_destroy(&sc->sc_lock); 304 mutex_destroy(&sc->sc_intr_lock); 305 cv_destroy(&sc->sc_condvar); 306 307 auconv_delete_encodings(sc->sc_encodings); 308 309 return 0; 310 } 311 312 int 313 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 314 { 315 pad_softc_t *sc; 316 317 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 318 if (sc == NULL) 319 return ENXIO; 320 321 if (atomic_swap_uint(&sc->sc_open, 1) != 0) { 322 return EBUSY; 323 } 324 325 getmicrotime(&sc->sc_last); 326 327 return 0; 328 } 329 330 int 331 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 332 { 333 pad_softc_t *sc; 334 335 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 336 if (sc == NULL) 337 return ENXIO; 338 339 KASSERT(sc->sc_open > 0); 340 sc->sc_open = 0; 341 342 return 0; 343 } 344 345 #define PAD_BYTES_PER_SEC (44100 * sizeof(int16_t) * 2) 346 #define TIMENEXTREAD (PAD_BLKSIZE * 1000 / PAD_BYTES_PER_SEC) 347 348 int 349 pad_read(dev_t dev, struct uio *uio, int flags) 350 { 351 struct timeval now; 352 uint64_t nowusec, lastusec; 353 pad_softc_t *sc; 354 pad_block_t pb; 355 void (*intr)(void *); 356 void *intrarg; 357 int err, wait_ticks; 358 359 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 360 if (sc == NULL) 361 return ENXIO; 362 363 err = 0; 364 365 while (uio->uio_resid > 0 && !err) { 366 mutex_enter(&sc->sc_lock); 367 intr = sc->sc_intr; 368 intrarg = sc->sc_intrarg; 369 370 getmicrotime(&now); 371 nowusec = (now.tv_sec * 1000000) + now.tv_usec; 372 lastusec = (sc->sc_last.tv_sec * 1000000) + 373 sc->sc_last.tv_usec; 374 if (lastusec + TIMENEXTREAD > nowusec) { 375 wait_ticks = (hz * ((lastusec + TIMENEXTREAD) - 376 nowusec)) / 1000000; 377 if (wait_ticks > 0) { 378 kpause("padwait", TRUE, wait_ticks, 379 &sc->sc_lock); 380 } 381 } 382 sc->sc_last.tv_sec = 383 (lastusec + TIMENEXTREAD) / 1000000; 384 sc->sc_last.tv_usec = 385 (lastusec + TIMENEXTREAD) % 1000000; 386 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 387 if (!err) { 388 mutex_exit(&sc->sc_lock); 389 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 390 continue; 391 } 392 393 if (intr) { 394 mutex_enter(&sc->sc_intr_lock); 395 kpreempt_disable(); 396 (*intr)(intrarg); 397 kpreempt_enable(); 398 mutex_exit(&sc->sc_intr_lock); 399 intr = sc->sc_intr; 400 intrarg = sc->sc_intrarg; 401 err = 0; 402 mutex_exit(&sc->sc_lock); 403 continue; 404 } 405 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 406 if (err != 0) { 407 mutex_exit(&sc->sc_lock); 408 break; 409 } 410 411 mutex_exit(&sc->sc_lock); 412 } 413 414 return err; 415 } 416 417 static int 418 pad_audio_open(void *opaque, int flags) 419 { 420 pad_softc_t *sc; 421 sc = opaque; 422 423 if (sc->sc_open == 0) 424 return EIO; 425 426 getmicrotime(&sc->sc_last); 427 return 0; 428 } 429 430 static int 431 pad_query_encoding(void *opaque, struct audio_encoding *ae) 432 { 433 pad_softc_t *sc; 434 435 sc = (pad_softc_t *)opaque; 436 437 KASSERT(mutex_owned(&sc->sc_lock)); 438 439 return auconv_query_encoding(sc->sc_encodings, ae); 440 } 441 442 static int 443 pad_set_params(void *opaque, int setmode, int usemode, 444 audio_params_t *play, audio_params_t *rec, 445 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 446 { 447 pad_softc_t *sc __diagused; 448 449 sc = (pad_softc_t *)opaque; 450 451 KASSERT(mutex_owned(&sc->sc_lock)); 452 453 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 454 play, true, pfil) < 0) 455 return EINVAL; 456 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 457 rec, true, rfil) < 0) 458 return EINVAL; 459 460 if (pfil->req_size > 0) 461 play = &pfil->filters[0].param; 462 switch (play->encoding) { 463 case AUDIO_ENCODING_SLINEAR_LE: 464 if (play->precision == 16 && play->validbits == 16) 465 pfil->prepend(pfil, pad_swvol_filter_le, play); 466 break; 467 case AUDIO_ENCODING_SLINEAR_BE: 468 if (play->precision == 16 && play->validbits == 16) 469 pfil->prepend(pfil, pad_swvol_filter_be, play); 470 break; 471 default: 472 break; 473 } 474 475 return 0; 476 } 477 478 static int 479 pad_start_output(void *opaque, void *block, int blksize, 480 void (*intr)(void *), void *intrarg) 481 { 482 pad_softc_t *sc; 483 int err; 484 485 sc = (pad_softc_t *)opaque; 486 487 KASSERT(mutex_owned(&sc->sc_lock)); 488 if (!sc->sc_open) 489 return EIO; 490 491 sc->sc_intr = intr; 492 sc->sc_intrarg = intrarg; 493 sc->sc_blksize = blksize; 494 495 err = pad_add_block(sc, block, blksize); 496 497 cv_broadcast(&sc->sc_condvar); 498 499 return err; 500 } 501 502 static int 503 pad_start_input(void *opaque, void *block, int blksize, 504 void (*intr)(void *), void *intrarg) 505 { 506 pad_softc_t *sc __diagused; 507 508 sc = (pad_softc_t *)opaque; 509 510 KASSERT(mutex_owned(&sc->sc_lock)); 511 512 return EOPNOTSUPP; 513 } 514 515 static int 516 pad_halt_output(void *opaque) 517 { 518 pad_softc_t *sc; 519 520 sc = (pad_softc_t *)opaque; 521 522 KASSERT(mutex_owned(&sc->sc_lock)); 523 524 sc->sc_intr = NULL; 525 sc->sc_intrarg = NULL; 526 sc->sc_buflen = 0; 527 sc->sc_rpos = sc->sc_wpos = 0; 528 529 return 0; 530 } 531 532 static int 533 pad_halt_input(void *opaque) 534 { 535 pad_softc_t *sc __diagused; 536 537 sc = (pad_softc_t *)opaque; 538 539 KASSERT(mutex_owned(&sc->sc_lock)); 540 541 return 0; 542 } 543 544 static int 545 pad_getdev(void *opaque, struct audio_device *ret) 546 { 547 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 548 strlcpy(ret->version, osrelease, sizeof(ret->version)); 549 strlcpy(ret->config, "pad", sizeof(ret->config)); 550 551 return 0; 552 } 553 554 static int 555 pad_set_port(void *opaque, mixer_ctrl_t *mc) 556 { 557 pad_softc_t *sc; 558 559 sc = (pad_softc_t *)opaque; 560 561 KASSERT(mutex_owned(&sc->sc_lock)); 562 563 switch (mc->dev) { 564 case PAD_OUTPUT_MASTER_VOLUME: 565 case PAD_INPUT_DAC_VOLUME: 566 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 567 return 0; 568 } 569 570 return ENXIO; 571 } 572 573 static int 574 pad_get_port(void *opaque, mixer_ctrl_t *mc) 575 { 576 pad_softc_t *sc; 577 578 sc = (pad_softc_t *)opaque; 579 580 KASSERT(mutex_owned(&sc->sc_lock)); 581 582 switch (mc->dev) { 583 case PAD_OUTPUT_MASTER_VOLUME: 584 case PAD_INPUT_DAC_VOLUME: 585 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 586 return 0; 587 } 588 589 return ENXIO; 590 } 591 592 static int 593 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 594 { 595 pad_softc_t *sc __diagused; 596 597 sc = (pad_softc_t *)opaque; 598 599 KASSERT(mutex_owned(&sc->sc_lock)); 600 601 switch (di->index) { 602 case PAD_OUTPUT_CLASS: 603 di->mixer_class = PAD_OUTPUT_CLASS; 604 strcpy(di->label.name, AudioCoutputs); 605 di->type = AUDIO_MIXER_CLASS; 606 di->next = di->prev = AUDIO_MIXER_LAST; 607 return 0; 608 case PAD_INPUT_CLASS: 609 di->mixer_class = PAD_INPUT_CLASS; 610 strcpy(di->label.name, AudioCinputs); 611 di->type = AUDIO_MIXER_CLASS; 612 di->next = di->prev = AUDIO_MIXER_LAST; 613 return 0; 614 case PAD_OUTPUT_MASTER_VOLUME: 615 di->mixer_class = PAD_OUTPUT_CLASS; 616 strcpy(di->label.name, AudioNmaster); 617 di->type = AUDIO_MIXER_VALUE; 618 di->next = di->prev = AUDIO_MIXER_LAST; 619 di->un.v.num_channels = 1; 620 strcpy(di->un.v.units.name, AudioNvolume); 621 return 0; 622 case PAD_INPUT_DAC_VOLUME: 623 di->mixer_class = PAD_INPUT_CLASS; 624 strcpy(di->label.name, AudioNdac); 625 di->type = AUDIO_MIXER_VALUE; 626 di->next = di->prev = AUDIO_MIXER_LAST; 627 di->un.v.num_channels = 1; 628 strcpy(di->un.v.units.name, AudioNvolume); 629 return 0; 630 } 631 632 return ENXIO; 633 } 634 635 static int 636 pad_get_props(void *opaque) 637 { 638 pad_softc_t *sc __diagused; 639 640 sc = (pad_softc_t *)opaque; 641 642 KASSERT(mutex_owned(&sc->sc_lock)); 643 644 return 0; 645 } 646 647 static int 648 pad_round_blocksize(void *opaque, int blksize, int mode, 649 const audio_params_t *p) 650 { 651 pad_softc_t *sc __diagused; 652 653 sc = (pad_softc_t *)opaque; 654 KASSERT(mutex_owned(&sc->sc_lock)); 655 656 return PAD_BLKSIZE; 657 } 658 659 static void 660 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 661 { 662 pad_softc_t *sc; 663 664 sc = (pad_softc_t *)opaque; 665 666 *intr = &sc->sc_intr_lock; 667 *thread = &sc->sc_lock; 668 } 669 670 static stream_filter_t * 671 pad_swvol_filter_le(struct audio_softc *asc, 672 const audio_params_t *from, const audio_params_t *to) 673 { 674 auvolconv_filter_t *this; 675 device_t dev = audio_get_device(asc); 676 struct pad_softc *sc = device_private(dev); 677 678 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 679 this->base.base.fetch_to = auvolconv_slinear16_le_fetch_to; 680 this->base.dtor = pad_swvol_dtor; 681 this->base.set_fetcher = stream_filter_set_fetcher; 682 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 683 this->vol = &sc->sc_swvol; 684 685 return (stream_filter_t *)this; 686 } 687 688 static stream_filter_t * 689 pad_swvol_filter_be(struct audio_softc *asc, 690 const audio_params_t *from, const audio_params_t *to) 691 { 692 auvolconv_filter_t *this; 693 device_t dev = audio_get_device(asc); 694 struct pad_softc *sc = device_private(dev); 695 696 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 697 this->base.base.fetch_to = auvolconv_slinear16_be_fetch_to; 698 this->base.dtor = pad_swvol_dtor; 699 this->base.set_fetcher = stream_filter_set_fetcher; 700 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 701 this->vol = &sc->sc_swvol; 702 703 return (stream_filter_t *)this; 704 } 705 706 static void 707 pad_swvol_dtor(stream_filter_t *this) 708 { 709 if (this) 710 kmem_free(this, sizeof(auvolconv_filter_t)); 711 } 712 713 #ifdef _MODULE 714 715 MODULE(MODULE_CLASS_DRIVER, pad, NULL); 716 717 static const struct cfiattrdata audiobuscf_iattrdata = { 718 "audiobus", 0, { { NULL, NULL, 0 }, } 719 }; 720 static const struct cfiattrdata * const pad_attrs[] = { 721 &audiobuscf_iattrdata, NULL 722 }; 723 724 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 725 extern struct cfattach pad_ca; 726 static int padloc[] = { -1, -1 }; 727 728 static struct cfdata pad_cfdata[] = { 729 { 730 .cf_name = "pad", 731 .cf_atname = "pad", 732 .cf_unit = 0, 733 .cf_fstate = FSTATE_STAR, 734 .cf_loc = padloc, 735 .cf_flags = 0, 736 .cf_pspec = NULL, 737 }, 738 { NULL, NULL, 0, 0, NULL, 0, NULL } 739 }; 740 741 static int 742 pad_modcmd(modcmd_t cmd, void *arg) 743 { 744 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 745 int error; 746 747 switch (cmd) { 748 case MODULE_CMD_INIT: 749 error = config_cfdriver_attach(&pad_cd); 750 if (error) { 751 return error; 752 } 753 754 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 755 if (error) { 756 config_cfdriver_detach(&pad_cd); 757 aprint_error("%s: unable to register cfattach\n", 758 pad_cd.cd_name); 759 760 return error; 761 } 762 763 error = config_cfdata_attach(pad_cfdata, 1); 764 if (error) { 765 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 766 config_cfdriver_detach(&pad_cd); 767 aprint_error("%s: unable to register cfdata\n", 768 pad_cd.cd_name); 769 770 return error; 771 } 772 773 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 774 &pad_cdevsw, &cmajor); 775 if (error) { 776 error = config_cfdata_detach(pad_cfdata); 777 if (error) { 778 return error; 779 } 780 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 781 config_cfdriver_detach(&pad_cd); 782 aprint_error("%s: unable to register devsw\n", 783 pad_cd.cd_name); 784 785 return error; 786 } 787 788 (void)config_attach_pseudo(pad_cfdata); 789 790 return 0; 791 case MODULE_CMD_FINI: 792 error = config_cfdata_detach(pad_cfdata); 793 if (error) { 794 return error; 795 } 796 797 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 798 config_cfdriver_detach(&pad_cd); 799 devsw_detach(NULL, &pad_cdevsw); 800 801 return 0; 802 default: 803 return ENOTTY; 804 } 805 } 806 807 #endif 808
Indexes created Fri Oct 17 09:09:57 GMT 2025