pad.c revision 1.28.4.3
1 /* $NetBSD: pad.c,v 1.28.4.3 2017/05/17 01:44:17 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 1.28.4.3 2017/05/17 01:44:17 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 48 #include <dev/audio_if.h> 49 #include <dev/audiovar.h> 50 #include <dev/auconv.h> 51 #include <dev/auvolconv.h> 52 53 #include <dev/pad/padvar.h> 54 55 #define PADUNIT(x) minor(x) 56 57 extern struct cfdriver pad_cd; 58 59 typedef struct pad_block { 60 uint8_t *pb_ptr; 61 int pb_len; 62 } pad_block_t; 63 64 enum { 65 PAD_OUTPUT_CLASS, 66 PAD_INPUT_CLASS, 67 PAD_OUTPUT_MASTER_VOLUME, 68 PAD_INPUT_DAC_VOLUME, 69 PAD_ENUM_LAST, 70 }; 71 72 static int pad_match(device_t, cfdata_t, void *); 73 static void pad_attach(device_t, device_t, void *); 74 static int pad_detach(device_t, int); 75 static void pad_childdet(device_t, device_t); 76 77 static int pad_audio_open(void *, int); 78 static int pad_query_encoding(void *, struct audio_encoding *); 79 static int pad_set_params(void *, int, int, 80 audio_params_t *, audio_params_t *, 81 stream_filter_list_t *, stream_filter_list_t *); 82 static int pad_start_output(void *, void *, int, 83 void (*)(void *), void *); 84 static int pad_start_input(void *, void *, int, 85 void (*)(void *), void *); 86 static int pad_halt_output(void *); 87 static int pad_halt_input(void *); 88 static int pad_getdev(void *, struct audio_device *); 89 static int pad_set_port(void *, mixer_ctrl_t *); 90 static int pad_get_port(void *, mixer_ctrl_t *); 91 static int pad_query_devinfo(void *, mixer_devinfo_t *); 92 static int pad_get_props(void *); 93 static int pad_round_blocksize(void *, int, int, const audio_params_t *); 94 static void pad_get_locks(void *, kmutex_t **, kmutex_t **); 95 96 static stream_filter_t *pad_swvol_filter_le(struct audio_softc *, 97 const audio_params_t *, const audio_params_t *); 98 static stream_filter_t *pad_swvol_filter_be(struct audio_softc *, 99 const audio_params_t *, const audio_params_t *); 100 static void pad_swvol_dtor(stream_filter_t *); 101 102 static const struct audio_hw_if pad_hw_if = { 103 .open = pad_audio_open, 104 .query_encoding = pad_query_encoding, 105 .set_params = pad_set_params, 106 .start_output = pad_start_output, 107 .start_input = pad_start_input, 108 .halt_output = pad_halt_output, 109 .halt_input = pad_halt_input, 110 .getdev = pad_getdev, 111 .set_port = pad_set_port, 112 .get_port = pad_get_port, 113 .query_devinfo = pad_query_devinfo, 114 .get_props = pad_get_props, 115 .round_blocksize = pad_round_blocksize, 116 .get_locks = pad_get_locks, 117 }; 118 119 #define PAD_NFORMATS 1 120 static const struct audio_format pad_formats[PAD_NFORMATS] = { 121 { NULL, AUMODE_PLAY|AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16, 122 2, AUFMT_STEREO, 1, { 44100 } }, 123 }; 124 125 extern void padattach(int); 126 127 static int pad_add_block(pad_softc_t *, uint8_t *, int); 128 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 129 130 dev_type_open(pad_open); 131 dev_type_close(pad_close); 132 dev_type_read(pad_read); 133 134 const struct cdevsw pad_cdevsw = { 135 DEVSW_MODULE_INIT 136 .d_open = pad_open, 137 .d_close = pad_close, 138 .d_read = pad_read, 139 .d_write = nowrite, 140 .d_ioctl = noioctl, 141 .d_stop = nostop, 142 .d_tty = notty, 143 .d_poll = nopoll, 144 .d_mmap = nommap, 145 .d_kqfilter = nokqfilter, 146 .d_discard = nodiscard, 147 .d_flag = D_OTHER | D_MPSAFE, 148 }; 149 150 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 151 NULL, NULL, pad_childdet); 152 153 void 154 padattach(int n) 155 { 156 int i, err; 157 device_t dev; 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 dev = config_attach_pseudo(cf); 183 device_release(dev); 184 } 185 186 return; 187 } 188 189 static int 190 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 191 { 192 int l; 193 194 if (sc->sc_open == 0) 195 return EIO; 196 197 KASSERT(mutex_owned(&sc->sc_lock)); 198 199 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 200 return ENOBUFS; 201 202 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 203 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 204 else { 205 l = PAD_BUFSIZE - sc->sc_wpos; 206 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 207 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 208 } 209 210 sc->sc_wpos += blksize; 211 if (sc->sc_wpos > PAD_BUFSIZE) 212 sc->sc_wpos -= PAD_BUFSIZE; 213 214 sc->sc_buflen += blksize; 215 216 return 0; 217 } 218 219 static int 220 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 221 { 222 int l; 223 224 KASSERT(mutex_owned(&sc->sc_lock)); 225 KASSERT(pb != NULL); 226 227 if (sc->sc_buflen < blksize) 228 return ERESTART; 229 230 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 231 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 232 pb->pb_len = blksize; 233 sc->sc_rpos += blksize; 234 } else { 235 l = PAD_BUFSIZE - sc->sc_rpos; 236 pb->pb_len = l; 237 sc->sc_rpos = 0; 238 } 239 sc->sc_buflen -= pb->pb_len; 240 241 return 0; 242 } 243 244 static int 245 pad_match(device_t parent, cfdata_t data, void *opaque) 246 { 247 248 return 1; 249 } 250 251 static void 252 pad_childdet(device_t self, device_t child) 253 { 254 pad_softc_t *sc = device_private(self); 255 256 sc->sc_audiodev = NULL; 257 } 258 259 static void 260 pad_attach(device_t parent, device_t self, void *opaque) 261 { 262 pad_softc_t *sc = device_private(self); 263 264 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 265 266 sc->sc_dev = self; 267 sc->sc_open = 0; 268 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 269 &sc->sc_encodings) != 0) { 270 aprint_error_dev(self, "couldn't create encodings\n"); 271 return; 272 } 273 274 cv_init(&sc->sc_condvar, device_xname(self)); 275 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 276 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 277 278 sc->sc_swvol = 255; 279 sc->sc_buflen = 0; 280 sc->sc_rpos = sc->sc_wpos = 0; 281 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 282 283 if (!pmf_device_register(self, NULL, NULL)) 284 aprint_error_dev(self, "couldn't establish power handler\n"); 285 286 return; 287 } 288 289 static int 290 pad_detach(device_t self, int flags) 291 { 292 pad_softc_t *sc = device_private(self); 293 int cmaj, mn, rc; 294 295 cmaj = cdevsw_lookup_major(&pad_cdevsw); 296 mn = device_unit(self); 297 vdevgone(cmaj, mn, mn, VCHR); 298 299 if ((rc = config_detach_children(self, flags)) != 0) 300 return rc; 301 302 pmf_device_deregister(self); 303 304 mutex_destroy(&sc->sc_lock); 305 mutex_destroy(&sc->sc_intr_lock); 306 cv_destroy(&sc->sc_condvar); 307 308 auconv_delete_encodings(sc->sc_encodings); 309 310 return 0; 311 } 312 313 int 314 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 315 { 316 pad_softc_t *sc; 317 318 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 319 if (sc == NULL) 320 return ENXIO; 321 322 if (atomic_swap_uint(&sc->sc_open, 1) != 0) { 323 return EBUSY; 324 } 325 326 getmicrotime(&sc->sc_last); 327 328 return 0; 329 } 330 331 int 332 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 333 { 334 pad_softc_t *sc; 335 336 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 337 if (sc == NULL) 338 return ENXIO; 339 340 KASSERT(sc->sc_open > 0); 341 sc->sc_open = 0; 342 343 return 0; 344 } 345 346 #define PAD_BYTES_PER_SEC (44100 * sizeof(int16_t) * 2) 347 #define TIMENEXTREAD (PAD_BLKSIZE * 1000 / PAD_BYTES_PER_SEC) 348 349 int 350 pad_read(dev_t dev, struct uio *uio, int flags) 351 { 352 struct timeval now; 353 uint64_t nowusec, lastusec; 354 pad_softc_t *sc; 355 pad_block_t pb; 356 void (*intr)(void *); 357 void *intrarg; 358 int err, wait_ticks; 359 360 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 361 if (sc == NULL) 362 return ENXIO; 363 364 err = 0; 365 366 while (uio->uio_resid > 0 && !err) { 367 mutex_enter(&sc->sc_lock); 368 intr = sc->sc_intr; 369 intrarg = sc->sc_intrarg; 370 371 getmicrotime(&now); 372 nowusec = (now.tv_sec * 1000000) + now.tv_usec; 373 lastusec = (sc->sc_last.tv_sec * 1000000) + 374 sc->sc_last.tv_usec; 375 if (lastusec + TIMENEXTREAD > nowusec) { 376 wait_ticks = (hz * ((lastusec + TIMENEXTREAD) - 377 nowusec)) / 1000000; 378 if (wait_ticks > 0) { 379 kpause("padwait", TRUE, wait_ticks, 380 &sc->sc_lock); 381 } 382 } 383 sc->sc_last.tv_sec = 384 (lastusec + TIMENEXTREAD) / 1000000; 385 sc->sc_last.tv_usec = 386 (lastusec + TIMENEXTREAD) % 1000000; 387 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 388 if (!err) { 389 mutex_exit(&sc->sc_lock); 390 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 391 continue; 392 } 393 394 if (intr) { 395 mutex_enter(&sc->sc_intr_lock); 396 kpreempt_disable(); 397 (*intr)(intrarg); 398 kpreempt_enable(); 399 mutex_exit(&sc->sc_intr_lock); 400 intr = sc->sc_intr; 401 intrarg = sc->sc_intrarg; 402 err = 0; 403 mutex_exit(&sc->sc_lock); 404 continue; 405 } 406 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 407 if (err != 0) { 408 mutex_exit(&sc->sc_lock); 409 break; 410 } 411 412 mutex_exit(&sc->sc_lock); 413 } 414 415 return err; 416 } 417 418 static int 419 pad_audio_open(void *opaque, int flags) 420 { 421 pad_softc_t *sc; 422 sc = opaque; 423 424 if (sc->sc_open == 0) 425 return EIO; 426 427 getmicrotime(&sc->sc_last); 428 return 0; 429 } 430 431 static int 432 pad_query_encoding(void *opaque, struct audio_encoding *ae) 433 { 434 pad_softc_t *sc; 435 436 sc = (pad_softc_t *)opaque; 437 438 KASSERT(mutex_owned(&sc->sc_lock)); 439 440 return auconv_query_encoding(sc->sc_encodings, ae); 441 } 442 443 static int 444 pad_set_params(void *opaque, int setmode, int usemode, 445 audio_params_t *play, audio_params_t *rec, 446 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 447 { 448 pad_softc_t *sc __diagused; 449 450 sc = (pad_softc_t *)opaque; 451 452 KASSERT(mutex_owned(&sc->sc_lock)); 453 454 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 455 play, true, pfil) < 0) 456 return EINVAL; 457 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 458 rec, true, rfil) < 0) 459 return EINVAL; 460 461 if (pfil->req_size > 0) 462 play = &pfil->filters[0].param; 463 switch (play->encoding) { 464 case AUDIO_ENCODING_SLINEAR_LE: 465 if (play->precision == 16 && play->validbits == 16) 466 pfil->prepend(pfil, pad_swvol_filter_le, play); 467 break; 468 case AUDIO_ENCODING_SLINEAR_BE: 469 if (play->precision == 16 && play->validbits == 16) 470 pfil->prepend(pfil, pad_swvol_filter_be, play); 471 break; 472 default: 473 break; 474 } 475 476 return 0; 477 } 478 479 static int 480 pad_start_output(void *opaque, void *block, int blksize, 481 void (*intr)(void *), void *intrarg) 482 { 483 pad_softc_t *sc; 484 int err; 485 486 sc = (pad_softc_t *)opaque; 487 488 KASSERT(mutex_owned(&sc->sc_lock)); 489 if (!sc->sc_open) 490 return EIO; 491 492 sc->sc_intr = intr; 493 sc->sc_intrarg = intrarg; 494 sc->sc_blksize = blksize; 495 496 err = pad_add_block(sc, block, blksize); 497 498 cv_broadcast(&sc->sc_condvar); 499 500 return err; 501 } 502 503 static int 504 pad_start_input(void *opaque, void *block, int blksize, 505 void (*intr)(void *), void *intrarg) 506 { 507 pad_softc_t *sc __diagused; 508 509 sc = (pad_softc_t *)opaque; 510 511 KASSERT(mutex_owned(&sc->sc_lock)); 512 513 return EOPNOTSUPP; 514 } 515 516 static int 517 pad_halt_output(void *opaque) 518 { 519 pad_softc_t *sc; 520 521 sc = (pad_softc_t *)opaque; 522 523 KASSERT(mutex_owned(&sc->sc_lock)); 524 525 sc->sc_intr = NULL; 526 sc->sc_intrarg = NULL; 527 sc->sc_buflen = 0; 528 sc->sc_rpos = sc->sc_wpos = 0; 529 530 return 0; 531 } 532 533 static int 534 pad_halt_input(void *opaque) 535 { 536 pad_softc_t *sc __diagused; 537 538 sc = (pad_softc_t *)opaque; 539 540 KASSERT(mutex_owned(&sc->sc_lock)); 541 542 return 0; 543 } 544 545 static int 546 pad_getdev(void *opaque, struct audio_device *ret) 547 { 548 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 549 strlcpy(ret->version, osrelease, sizeof(ret->version)); 550 strlcpy(ret->config, "pad", sizeof(ret->config)); 551 552 return 0; 553 } 554 555 static int 556 pad_set_port(void *opaque, mixer_ctrl_t *mc) 557 { 558 pad_softc_t *sc; 559 560 sc = (pad_softc_t *)opaque; 561 562 KASSERT(mutex_owned(&sc->sc_lock)); 563 564 switch (mc->dev) { 565 case PAD_OUTPUT_MASTER_VOLUME: 566 case PAD_INPUT_DAC_VOLUME: 567 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 568 return 0; 569 } 570 571 return ENXIO; 572 } 573 574 static int 575 pad_get_port(void *opaque, mixer_ctrl_t *mc) 576 { 577 pad_softc_t *sc; 578 579 sc = (pad_softc_t *)opaque; 580 581 KASSERT(mutex_owned(&sc->sc_lock)); 582 583 switch (mc->dev) { 584 case PAD_OUTPUT_MASTER_VOLUME: 585 case PAD_INPUT_DAC_VOLUME: 586 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 587 return 0; 588 } 589 590 return ENXIO; 591 } 592 593 static int 594 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 595 { 596 pad_softc_t *sc __diagused; 597 598 sc = (pad_softc_t *)opaque; 599 600 KASSERT(mutex_owned(&sc->sc_lock)); 601 602 switch (di->index) { 603 case PAD_OUTPUT_CLASS: 604 di->mixer_class = PAD_OUTPUT_CLASS; 605 strcpy(di->label.name, AudioCoutputs); 606 di->type = AUDIO_MIXER_CLASS; 607 di->next = di->prev = AUDIO_MIXER_LAST; 608 return 0; 609 case PAD_INPUT_CLASS: 610 di->mixer_class = PAD_INPUT_CLASS; 611 strcpy(di->label.name, AudioCinputs); 612 di->type = AUDIO_MIXER_CLASS; 613 di->next = di->prev = AUDIO_MIXER_LAST; 614 return 0; 615 case PAD_OUTPUT_MASTER_VOLUME: 616 di->mixer_class = PAD_OUTPUT_CLASS; 617 strcpy(di->label.name, AudioNmaster); 618 di->type = AUDIO_MIXER_VALUE; 619 di->next = di->prev = AUDIO_MIXER_LAST; 620 di->un.v.num_channels = 1; 621 strcpy(di->un.v.units.name, AudioNvolume); 622 return 0; 623 case PAD_INPUT_DAC_VOLUME: 624 di->mixer_class = PAD_INPUT_CLASS; 625 strcpy(di->label.name, AudioNdac); 626 di->type = AUDIO_MIXER_VALUE; 627 di->next = di->prev = AUDIO_MIXER_LAST; 628 di->un.v.num_channels = 1; 629 strcpy(di->un.v.units.name, AudioNvolume); 630 return 0; 631 } 632 633 return ENXIO; 634 } 635 636 static int 637 pad_get_props(void *opaque) 638 { 639 pad_softc_t *sc __diagused; 640 641 sc = (pad_softc_t *)opaque; 642 643 KASSERT(mutex_owned(&sc->sc_lock)); 644 645 return 0; 646 } 647 648 static int 649 pad_round_blocksize(void *opaque, int blksize, int mode, 650 const audio_params_t *p) 651 { 652 pad_softc_t *sc __diagused; 653 654 sc = (pad_softc_t *)opaque; 655 KASSERT(mutex_owned(&sc->sc_lock)); 656 657 return PAD_BLKSIZE; 658 } 659 660 static void 661 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 662 { 663 pad_softc_t *sc; 664 665 sc = (pad_softc_t *)opaque; 666 667 *intr = &sc->sc_intr_lock; 668 *thread = &sc->sc_lock; 669 } 670 671 static stream_filter_t * 672 pad_swvol_filter_le(struct audio_softc *asc, 673 const audio_params_t *from, const audio_params_t *to) 674 { 675 auvolconv_filter_t *this; 676 device_t dev = audio_get_device(asc); 677 struct pad_softc *sc = device_private(dev); 678 679 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 680 this->base.base.fetch_to = auvolconv_slinear16_le_fetch_to; 681 this->base.dtor = pad_swvol_dtor; 682 this->base.set_fetcher = stream_filter_set_fetcher; 683 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 684 this->vol = &sc->sc_swvol; 685 686 return (stream_filter_t *)this; 687 } 688 689 static stream_filter_t * 690 pad_swvol_filter_be(struct audio_softc *asc, 691 const audio_params_t *from, const audio_params_t *to) 692 { 693 auvolconv_filter_t *this; 694 device_t dev = audio_get_device(asc); 695 struct pad_softc *sc = device_private(dev); 696 697 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 698 this->base.base.fetch_to = auvolconv_slinear16_be_fetch_to; 699 this->base.dtor = pad_swvol_dtor; 700 this->base.set_fetcher = stream_filter_set_fetcher; 701 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 702 this->vol = &sc->sc_swvol; 703 704 return (stream_filter_t *)this; 705 } 706 707 static void 708 pad_swvol_dtor(stream_filter_t *this) 709 { 710 if (this) 711 kmem_free(this, sizeof(auvolconv_filter_t)); 712 } 713 714 #ifdef _MODULE 715 716 MODULE(MODULE_CLASS_DRIVER, pad, NULL); 717 718 static const struct cfiattrdata audiobuscf_iattrdata = { 719 "audiobus", 0, { { NULL, NULL, 0 }, } 720 }; 721 static const struct cfiattrdata * const pad_attrs[] = { 722 &audiobuscf_iattrdata, NULL 723 }; 724 725 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 726 extern struct cfattach pad_ca; 727 static int padloc[] = { -1, -1 }; 728 729 static struct cfdata pad_cfdata[] = { 730 { 731 .cf_name = "pad", 732 .cf_atname = "pad", 733 .cf_unit = 0, 734 .cf_fstate = FSTATE_STAR, 735 .cf_loc = padloc, 736 .cf_flags = 0, 737 .cf_pspec = NULL, 738 }, 739 { NULL, NULL, 0, 0, NULL, 0, NULL } 740 }; 741 742 static int 743 pad_modcmd(modcmd_t cmd, void *arg) 744 { 745 device_t dev; 746 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 747 int error; 748 749 switch (cmd) { 750 case MODULE_CMD_INIT: 751 error = config_cfdriver_attach(&pad_cd); 752 if (error) { 753 return error; 754 } 755 756 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 757 if (error) { 758 config_cfdriver_detach(&pad_cd); 759 aprint_error("%s: unable to register cfattach\n", 760 pad_cd.cd_name); 761 762 return error; 763 } 764 765 error = config_cfdata_attach(pad_cfdata, 1); 766 if (error) { 767 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 768 config_cfdriver_detach(&pad_cd); 769 aprint_error("%s: unable to register cfdata\n", 770 pad_cd.cd_name); 771 772 return error; 773 } 774 775 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 776 &pad_cdevsw, &cmajor); 777 if (error) { 778 error = config_cfdata_detach(pad_cfdata); 779 if (error) { 780 return error; 781 } 782 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 783 config_cfdriver_detach(&pad_cd); 784 aprint_error("%s: unable to register devsw\n", 785 pad_cd.cd_name); 786 787 return error; 788 } 789 790 dev = config_attach_pseudo(pad_cfdata); 791 device_release(dev); 792 793 return 0; 794 case MODULE_CMD_FINI: 795 error = config_cfdata_detach(pad_cfdata); 796 if (error) { 797 return error; 798 } 799 800 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 801 config_cfdriver_detach(&pad_cd); 802 devsw_detach(NULL, &pad_cdevsw); 803 804 return 0; 805 default: 806 return ENOTTY; 807 } 808 } 809 810 #endif 811
Indexes created Fri Oct 17 09:09:57 GMT 2025