pad.c revision 1.28.4.2
1 /* $NetBSD: pad.c,v 1.28.4.2 2017/04/29 11:12:14 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 1.28.4.2 2017/04/29 11:12:14 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 cfdata_t cf; 158 159 aprint_debug("pad: requested %d units\n", n); 160 161 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 162 if (err) { 163 aprint_error("%s: couldn't register cfattach: %d\n", 164 pad_cd.cd_name, err); 165 config_cfdriver_detach(&pad_cd); 166 return; 167 } 168 169 for (i = 0; i < n; i++) { 170 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 171 if (cf == NULL) { 172 aprint_error("%s: couldn't allocate cfdata\n", 173 pad_cd.cd_name); 174 continue; 175 } 176 cf->cf_name = pad_cd.cd_name; 177 cf->cf_atname = pad_cd.cd_name; 178 cf->cf_unit = i; 179 cf->cf_fstate = FSTATE_STAR; 180 181 (void)config_attach_pseudo(cf); 182 } 183 184 return; 185 } 186 187 static int 188 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 189 { 190 int l; 191 192 if (sc->sc_open == 0) 193 return EIO; 194 195 KASSERT(mutex_owned(&sc->sc_lock)); 196 197 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 198 return ENOBUFS; 199 200 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 201 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 202 else { 203 l = PAD_BUFSIZE - sc->sc_wpos; 204 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 205 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 206 } 207 208 sc->sc_wpos += blksize; 209 if (sc->sc_wpos > PAD_BUFSIZE) 210 sc->sc_wpos -= PAD_BUFSIZE; 211 212 sc->sc_buflen += blksize; 213 214 return 0; 215 } 216 217 static int 218 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 219 { 220 int l; 221 222 KASSERT(mutex_owned(&sc->sc_lock)); 223 KASSERT(pb != NULL); 224 225 if (sc->sc_buflen < blksize) 226 return ERESTART; 227 228 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 229 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 230 pb->pb_len = blksize; 231 sc->sc_rpos += blksize; 232 } else { 233 l = PAD_BUFSIZE - sc->sc_rpos; 234 pb->pb_len = l; 235 sc->sc_rpos = 0; 236 } 237 sc->sc_buflen -= pb->pb_len; 238 239 return 0; 240 } 241 242 static int 243 pad_match(device_t parent, cfdata_t data, void *opaque) 244 { 245 246 return 1; 247 } 248 249 static void 250 pad_childdet(device_t self, device_t child) 251 { 252 pad_softc_t *sc = device_private(self); 253 254 sc->sc_audiodev = NULL; 255 } 256 257 static void 258 pad_attach(device_t parent, device_t self, void *opaque) 259 { 260 pad_softc_t *sc = device_private(self); 261 262 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 263 264 sc->sc_dev = self; 265 sc->sc_open = 0; 266 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 267 &sc->sc_encodings) != 0) { 268 aprint_error_dev(self, "couldn't create encodings\n"); 269 return; 270 } 271 272 cv_init(&sc->sc_condvar, device_xname(self)); 273 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 274 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 275 276 sc->sc_swvol = 255; 277 sc->sc_buflen = 0; 278 sc->sc_rpos = sc->sc_wpos = 0; 279 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 280 281 if (!pmf_device_register(self, NULL, NULL)) 282 aprint_error_dev(self, "couldn't establish power handler\n"); 283 284 return; 285 } 286 287 static int 288 pad_detach(device_t self, int flags) 289 { 290 pad_softc_t *sc = device_private(self); 291 int cmaj, mn, rc; 292 293 cmaj = cdevsw_lookup_major(&pad_cdevsw); 294 mn = device_unit(self); 295 vdevgone(cmaj, mn, mn, VCHR); 296 297 if ((rc = config_detach_children(self, flags)) != 0) 298 return rc; 299 300 pmf_device_deregister(self); 301 302 mutex_destroy(&sc->sc_lock); 303 mutex_destroy(&sc->sc_intr_lock); 304 cv_destroy(&sc->sc_condvar); 305 306 auconv_delete_encodings(sc->sc_encodings); 307 308 return 0; 309 } 310 311 int 312 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 313 { 314 pad_softc_t *sc; 315 316 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 317 if (sc == NULL) 318 return ENXIO; 319 320 if (atomic_swap_uint(&sc->sc_open, 1) != 0) { 321 return EBUSY; 322 } 323 324 getmicrotime(&sc->sc_last); 325 326 return 0; 327 } 328 329 int 330 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 331 { 332 pad_softc_t *sc; 333 334 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 335 if (sc == NULL) 336 return ENXIO; 337 338 KASSERT(sc->sc_open > 0); 339 sc->sc_open = 0; 340 341 return 0; 342 } 343 344 #define PAD_BYTES_PER_SEC (44100 * sizeof(int16_t) * 2) 345 #define TIMENEXTREAD (PAD_BLKSIZE * 1000 / PAD_BYTES_PER_SEC) 346 347 int 348 pad_read(dev_t dev, struct uio *uio, int flags) 349 { 350 struct timeval now; 351 uint64_t nowusec, lastusec; 352 pad_softc_t *sc; 353 pad_block_t pb; 354 void (*intr)(void *); 355 void *intrarg; 356 int err, wait_ticks; 357 358 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 359 if (sc == NULL) 360 return ENXIO; 361 362 err = 0; 363 364 while (uio->uio_resid > 0 && !err) { 365 mutex_enter(&sc->sc_lock); 366 intr = sc->sc_intr; 367 intrarg = sc->sc_intrarg; 368 369 getmicrotime(&now); 370 nowusec = (now.tv_sec * 1000000) + now.tv_usec; 371 lastusec = (sc->sc_last.tv_sec * 1000000) + 372 sc->sc_last.tv_usec; 373 if (lastusec + TIMENEXTREAD > nowusec) { 374 wait_ticks = (hz * ((lastusec + TIMENEXTREAD) - 375 nowusec)) / 1000000; 376 if (wait_ticks > 0) { 377 kpause("padwait", TRUE, wait_ticks, 378 &sc->sc_lock); 379 } 380 } 381 sc->sc_last.tv_sec = 382 (lastusec + TIMENEXTREAD) / 1000000; 383 sc->sc_last.tv_usec = 384 (lastusec + TIMENEXTREAD) % 1000000; 385 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 386 if (!err) { 387 mutex_exit(&sc->sc_lock); 388 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 389 continue; 390 } 391 392 if (intr) { 393 mutex_enter(&sc->sc_intr_lock); 394 kpreempt_disable(); 395 (*intr)(intrarg); 396 kpreempt_enable(); 397 mutex_exit(&sc->sc_intr_lock); 398 intr = sc->sc_intr; 399 intrarg = sc->sc_intrarg; 400 err = 0; 401 mutex_exit(&sc->sc_lock); 402 continue; 403 } 404 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 405 if (err != 0) { 406 mutex_exit(&sc->sc_lock); 407 break; 408 } 409 410 mutex_exit(&sc->sc_lock); 411 } 412 413 return err; 414 } 415 416 static int 417 pad_audio_open(void *opaque, int flags) 418 { 419 pad_softc_t *sc; 420 sc = opaque; 421 422 if (sc->sc_open == 0) 423 return EIO; 424 425 getmicrotime(&sc->sc_last); 426 return 0; 427 } 428 429 static int 430 pad_query_encoding(void *opaque, struct audio_encoding *ae) 431 { 432 pad_softc_t *sc; 433 434 sc = (pad_softc_t *)opaque; 435 436 KASSERT(mutex_owned(&sc->sc_lock)); 437 438 return auconv_query_encoding(sc->sc_encodings, ae); 439 } 440 441 static int 442 pad_set_params(void *opaque, int setmode, int usemode, 443 audio_params_t *play, audio_params_t *rec, 444 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 445 { 446 pad_softc_t *sc __diagused; 447 448 sc = (pad_softc_t *)opaque; 449 450 KASSERT(mutex_owned(&sc->sc_lock)); 451 452 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 453 play, true, pfil) < 0) 454 return EINVAL; 455 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 456 rec, true, rfil) < 0) 457 return EINVAL; 458 459 if (pfil->req_size > 0) 460 play = &pfil->filters[0].param; 461 switch (play->encoding) { 462 case AUDIO_ENCODING_SLINEAR_LE: 463 if (play->precision == 16 && play->validbits == 16) 464 pfil->prepend(pfil, pad_swvol_filter_le, play); 465 break; 466 case AUDIO_ENCODING_SLINEAR_BE: 467 if (play->precision == 16 && play->validbits == 16) 468 pfil->prepend(pfil, pad_swvol_filter_be, play); 469 break; 470 default: 471 break; 472 } 473 474 return 0; 475 } 476 477 static int 478 pad_start_output(void *opaque, void *block, int blksize, 479 void (*intr)(void *), void *intrarg) 480 { 481 pad_softc_t *sc; 482 int err; 483 484 sc = (pad_softc_t *)opaque; 485 486 KASSERT(mutex_owned(&sc->sc_lock)); 487 if (!sc->sc_open) 488 return EIO; 489 490 sc->sc_intr = intr; 491 sc->sc_intrarg = intrarg; 492 sc->sc_blksize = blksize; 493 494 err = pad_add_block(sc, block, blksize); 495 496 cv_broadcast(&sc->sc_condvar); 497 498 return err; 499 } 500 501 static int 502 pad_start_input(void *opaque, void *block, int blksize, 503 void (*intr)(void *), void *intrarg) 504 { 505 pad_softc_t *sc __diagused; 506 507 sc = (pad_softc_t *)opaque; 508 509 KASSERT(mutex_owned(&sc->sc_lock)); 510 511 return EOPNOTSUPP; 512 } 513 514 static int 515 pad_halt_output(void *opaque) 516 { 517 pad_softc_t *sc; 518 519 sc = (pad_softc_t *)opaque; 520 521 KASSERT(mutex_owned(&sc->sc_lock)); 522 523 sc->sc_intr = NULL; 524 sc->sc_intrarg = NULL; 525 sc->sc_buflen = 0; 526 sc->sc_rpos = sc->sc_wpos = 0; 527 528 return 0; 529 } 530 531 static int 532 pad_halt_input(void *opaque) 533 { 534 pad_softc_t *sc __diagused; 535 536 sc = (pad_softc_t *)opaque; 537 538 KASSERT(mutex_owned(&sc->sc_lock)); 539 540 return 0; 541 } 542 543 static int 544 pad_getdev(void *opaque, struct audio_device *ret) 545 { 546 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 547 strlcpy(ret->version, osrelease, sizeof(ret->version)); 548 strlcpy(ret->config, "pad", sizeof(ret->config)); 549 550 return 0; 551 } 552 553 static int 554 pad_set_port(void *opaque, mixer_ctrl_t *mc) 555 { 556 pad_softc_t *sc; 557 558 sc = (pad_softc_t *)opaque; 559 560 KASSERT(mutex_owned(&sc->sc_lock)); 561 562 switch (mc->dev) { 563 case PAD_OUTPUT_MASTER_VOLUME: 564 case PAD_INPUT_DAC_VOLUME: 565 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 566 return 0; 567 } 568 569 return ENXIO; 570 } 571 572 static int 573 pad_get_port(void *opaque, mixer_ctrl_t *mc) 574 { 575 pad_softc_t *sc; 576 577 sc = (pad_softc_t *)opaque; 578 579 KASSERT(mutex_owned(&sc->sc_lock)); 580 581 switch (mc->dev) { 582 case PAD_OUTPUT_MASTER_VOLUME: 583 case PAD_INPUT_DAC_VOLUME: 584 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 585 return 0; 586 } 587 588 return ENXIO; 589 } 590 591 static int 592 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 593 { 594 pad_softc_t *sc __diagused; 595 596 sc = (pad_softc_t *)opaque; 597 598 KASSERT(mutex_owned(&sc->sc_lock)); 599 600 switch (di->index) { 601 case PAD_OUTPUT_CLASS: 602 di->mixer_class = PAD_OUTPUT_CLASS; 603 strcpy(di->label.name, AudioCoutputs); 604 di->type = AUDIO_MIXER_CLASS; 605 di->next = di->prev = AUDIO_MIXER_LAST; 606 return 0; 607 case PAD_INPUT_CLASS: 608 di->mixer_class = PAD_INPUT_CLASS; 609 strcpy(di->label.name, AudioCinputs); 610 di->type = AUDIO_MIXER_CLASS; 611 di->next = di->prev = AUDIO_MIXER_LAST; 612 return 0; 613 case PAD_OUTPUT_MASTER_VOLUME: 614 di->mixer_class = PAD_OUTPUT_CLASS; 615 strcpy(di->label.name, AudioNmaster); 616 di->type = AUDIO_MIXER_VALUE; 617 di->next = di->prev = AUDIO_MIXER_LAST; 618 di->un.v.num_channels = 1; 619 strcpy(di->un.v.units.name, AudioNvolume); 620 return 0; 621 case PAD_INPUT_DAC_VOLUME: 622 di->mixer_class = PAD_INPUT_CLASS; 623 strcpy(di->label.name, AudioNdac); 624 di->type = AUDIO_MIXER_VALUE; 625 di->next = di->prev = AUDIO_MIXER_LAST; 626 di->un.v.num_channels = 1; 627 strcpy(di->un.v.units.name, AudioNvolume); 628 return 0; 629 } 630 631 return ENXIO; 632 } 633 634 static int 635 pad_get_props(void *opaque) 636 { 637 pad_softc_t *sc __diagused; 638 639 sc = (pad_softc_t *)opaque; 640 641 KASSERT(mutex_owned(&sc->sc_lock)); 642 643 return 0; 644 } 645 646 static int 647 pad_round_blocksize(void *opaque, int blksize, int mode, 648 const audio_params_t *p) 649 { 650 pad_softc_t *sc __diagused; 651 652 sc = (pad_softc_t *)opaque; 653 KASSERT(mutex_owned(&sc->sc_lock)); 654 655 return PAD_BLKSIZE; 656 } 657 658 static void 659 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 660 { 661 pad_softc_t *sc; 662 663 sc = (pad_softc_t *)opaque; 664 665 *intr = &sc->sc_intr_lock; 666 *thread = &sc->sc_lock; 667 } 668 669 static stream_filter_t * 670 pad_swvol_filter_le(struct audio_softc *asc, 671 const audio_params_t *from, const audio_params_t *to) 672 { 673 auvolconv_filter_t *this; 674 device_t dev = audio_get_device(asc); 675 struct pad_softc *sc = device_private(dev); 676 677 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 678 this->base.base.fetch_to = auvolconv_slinear16_le_fetch_to; 679 this->base.dtor = pad_swvol_dtor; 680 this->base.set_fetcher = stream_filter_set_fetcher; 681 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 682 this->vol = &sc->sc_swvol; 683 684 return (stream_filter_t *)this; 685 } 686 687 static stream_filter_t * 688 pad_swvol_filter_be(struct audio_softc *asc, 689 const audio_params_t *from, const audio_params_t *to) 690 { 691 auvolconv_filter_t *this; 692 device_t dev = audio_get_device(asc); 693 struct pad_softc *sc = device_private(dev); 694 695 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 696 this->base.base.fetch_to = auvolconv_slinear16_be_fetch_to; 697 this->base.dtor = pad_swvol_dtor; 698 this->base.set_fetcher = stream_filter_set_fetcher; 699 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 700 this->vol = &sc->sc_swvol; 701 702 return (stream_filter_t *)this; 703 } 704 705 static void 706 pad_swvol_dtor(stream_filter_t *this) 707 { 708 if (this) 709 kmem_free(this, sizeof(auvolconv_filter_t)); 710 } 711 712 #ifdef _MODULE 713 714 MODULE(MODULE_CLASS_DRIVER, pad, NULL); 715 716 static const struct cfiattrdata audiobuscf_iattrdata = { 717 "audiobus", 0, { { NULL, NULL, 0 }, } 718 }; 719 static const struct cfiattrdata * const pad_attrs[] = { 720 &audiobuscf_iattrdata, NULL 721 }; 722 723 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 724 extern struct cfattach pad_ca; 725 static int padloc[] = { -1, -1 }; 726 727 static struct cfdata pad_cfdata[] = { 728 { 729 .cf_name = "pad", 730 .cf_atname = "pad", 731 .cf_unit = 0, 732 .cf_fstate = FSTATE_STAR, 733 .cf_loc = padloc, 734 .cf_flags = 0, 735 .cf_pspec = NULL, 736 }, 737 { NULL, NULL, 0, 0, NULL, 0, NULL } 738 }; 739 740 static int 741 pad_modcmd(modcmd_t cmd, void *arg) 742 { 743 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 744 int error; 745 746 switch (cmd) { 747 case MODULE_CMD_INIT: 748 error = config_cfdriver_attach(&pad_cd); 749 if (error) { 750 return error; 751 } 752 753 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 754 if (error) { 755 config_cfdriver_detach(&pad_cd); 756 aprint_error("%s: unable to register cfattach\n", 757 pad_cd.cd_name); 758 759 return error; 760 } 761 762 error = config_cfdata_attach(pad_cfdata, 1); 763 if (error) { 764 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 765 config_cfdriver_detach(&pad_cd); 766 aprint_error("%s: unable to register cfdata\n", 767 pad_cd.cd_name); 768 769 return error; 770 } 771 772 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 773 &pad_cdevsw, &cmajor); 774 if (error) { 775 error = config_cfdata_detach(pad_cfdata); 776 if (error) { 777 return error; 778 } 779 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 780 config_cfdriver_detach(&pad_cd); 781 aprint_error("%s: unable to register devsw\n", 782 pad_cd.cd_name); 783 784 return error; 785 } 786 787 (void)config_attach_pseudo(pad_cfdata); 788 789 return 0; 790 case MODULE_CMD_FINI: 791 error = config_cfdata_detach(pad_cfdata); 792 if (error) { 793 return error; 794 } 795 796 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 797 config_cfdriver_detach(&pad_cd); 798 devsw_detach(NULL, &pad_cdevsw); 799 800 return 0; 801 default: 802 return ENOTTY; 803 } 804 } 805 806 #endif 807
Indexes created Sun Oct 19 02:09:48 GMT 2025