pad.c revision 1.35
1 /* $NetBSD: pad.c,v 1.35 2017/06/06 07:29:35 nat 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 1.35 2017/06/06 07:29:35 nat 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 bool pad_is_attached; /* Do we have an audio* child? */ 103 104 static const struct audio_hw_if pad_hw_if = { 105 .open = pad_audio_open, 106 .query_encoding = pad_query_encoding, 107 .set_params = pad_set_params, 108 .start_output = pad_start_output, 109 .start_input = pad_start_input, 110 .halt_output = pad_halt_output, 111 .halt_input = pad_halt_input, 112 .getdev = pad_getdev, 113 .set_port = pad_set_port, 114 .get_port = pad_get_port, 115 .query_devinfo = pad_query_devinfo, 116 .get_props = pad_get_props, 117 .round_blocksize = pad_round_blocksize, 118 .get_locks = pad_get_locks, 119 }; 120 121 #define PAD_NFORMATS 1 122 static const struct audio_format pad_formats[PAD_NFORMATS] = { 123 { NULL, AUMODE_PLAY|AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16, 124 2, AUFMT_STEREO, 1, { 44100 } }, 125 }; 126 127 extern void padattach(int); 128 129 static int pad_add_block(pad_softc_t *, uint8_t *, int); 130 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 131 132 dev_type_open(pad_open); 133 dev_type_close(pad_close); 134 dev_type_read(pad_read); 135 136 const struct cdevsw pad_cdevsw = { 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 cf->cf_name = pad_cd.cd_name; 173 cf->cf_atname = pad_cd.cd_name; 174 cf->cf_unit = i; 175 cf->cf_fstate = FSTATE_STAR; 176 177 (void)config_attach_pseudo(cf); 178 } 179 180 return; 181 } 182 183 static int 184 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 185 { 186 int l; 187 188 if (sc->sc_open == 0) 189 return EIO; 190 191 KASSERT(mutex_owned(&sc->sc_lock)); 192 193 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 194 return ENOBUFS; 195 196 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 197 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 198 else { 199 l = PAD_BUFSIZE - sc->sc_wpos; 200 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 201 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 202 } 203 204 sc->sc_wpos += blksize; 205 if (sc->sc_wpos > PAD_BUFSIZE) 206 sc->sc_wpos -= PAD_BUFSIZE; 207 208 sc->sc_buflen += blksize; 209 210 return 0; 211 } 212 213 static int 214 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 215 { 216 int l; 217 218 KASSERT(mutex_owned(&sc->sc_lock)); 219 KASSERT(pb != NULL); 220 221 if (sc->sc_buflen < blksize) 222 return ERESTART; 223 224 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 225 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 226 pb->pb_len = blksize; 227 sc->sc_rpos += blksize; 228 } else { 229 l = PAD_BUFSIZE - sc->sc_rpos; 230 pb->pb_len = l; 231 sc->sc_rpos = 0; 232 } 233 sc->sc_buflen -= pb->pb_len; 234 235 return 0; 236 } 237 238 static int 239 pad_match(device_t parent, cfdata_t data, void *opaque) 240 { 241 242 return 1; 243 } 244 245 static void 246 pad_childdet(device_t self, device_t child) 247 { 248 pad_softc_t *sc = device_private(self); 249 250 sc->sc_audiodev = NULL; 251 } 252 253 static void 254 pad_attach(device_t parent, device_t self, void *opaque) 255 { 256 pad_softc_t *sc = device_private(self); 257 258 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 259 260 sc->sc_dev = self; 261 sc->sc_open = 0; 262 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 263 &sc->sc_encodings) != 0) { 264 aprint_error_dev(self, "couldn't create encodings\n"); 265 return; 266 } 267 268 cv_init(&sc->sc_condvar, device_xname(self)); 269 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 270 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 271 272 sc->sc_swvol = 255; 273 sc->sc_buflen = 0; 274 sc->sc_rpos = sc->sc_wpos = 0; 275 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 276 277 if (!pmf_device_register(self, NULL, NULL)) 278 aprint_error_dev(self, "couldn't establish power handler\n"); 279 280 pad_is_attached = true; 281 return; 282 } 283 284 static int 285 pad_detach(device_t self, int flags) 286 { 287 pad_softc_t *sc = device_private(self); 288 int cmaj, mn, rc; 289 290 if (!pad_is_attached) 291 return ENXIO; 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 pad_is_attached = false; 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 return 0; 326 } 327 328 int 329 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 330 { 331 pad_softc_t *sc; 332 333 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 334 if (sc == NULL) 335 return ENXIO; 336 337 KASSERT(sc->sc_open > 0); 338 sc->sc_open = 0; 339 340 return 0; 341 } 342 343 #define PAD_BYTES_PER_SEC (44100 * sizeof(int16_t) * 2) 344 #define BYTESTOSLEEP (int64_t)(PAD_BLKSIZE) 345 #define TIMENEXTREAD (int64_t)(BYTESTOSLEEP * 1000000 / 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 if (sc->sc_bytes_count >= BYTESTOSLEEP) { 375 sc->sc_remainder += 376 ((lastusec + TIMENEXTREAD) - nowusec); 377 } 378 379 wait_ticks = (hz * sc->sc_remainder) / 1000000; 380 if (wait_ticks > 0) { 381 sc->sc_remainder -= wait_ticks * 1000000 / hz; 382 kpause("padwait", TRUE, wait_ticks, 383 &sc->sc_lock); 384 } 385 } 386 387 if (sc->sc_bytes_count >= BYTESTOSLEEP) 388 sc->sc_bytes_count -= BYTESTOSLEEP; 389 390 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 391 if (!err) { 392 getmicrotime(&sc->sc_last); 393 sc->sc_bytes_count += pb.pb_len; 394 mutex_exit(&sc->sc_lock); 395 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 396 continue; 397 } 398 399 if (intr) { 400 mutex_enter(&sc->sc_intr_lock); 401 kpreempt_disable(); 402 (*intr)(intrarg); 403 kpreempt_enable(); 404 mutex_exit(&sc->sc_intr_lock); 405 intr = sc->sc_intr; 406 intrarg = sc->sc_intrarg; 407 err = 0; 408 mutex_exit(&sc->sc_lock); 409 continue; 410 } 411 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 412 if (err != 0) { 413 mutex_exit(&sc->sc_lock); 414 break; 415 } 416 417 mutex_exit(&sc->sc_lock); 418 } 419 420 return err; 421 } 422 423 static int 424 pad_audio_open(void *opaque, int flags) 425 { 426 pad_softc_t *sc; 427 sc = opaque; 428 429 if (sc->sc_open == 0) 430 return EIO; 431 432 getmicrotime(&sc->sc_last); 433 sc->sc_bytes_count = 0; 434 sc->sc_remainder = 0; 435 436 return 0; 437 } 438 439 static int 440 pad_query_encoding(void *opaque, struct audio_encoding *ae) 441 { 442 pad_softc_t *sc; 443 444 sc = (pad_softc_t *)opaque; 445 446 KASSERT(mutex_owned(&sc->sc_lock)); 447 448 return auconv_query_encoding(sc->sc_encodings, ae); 449 } 450 451 static int 452 pad_set_params(void *opaque, int setmode, int usemode, 453 audio_params_t *play, audio_params_t *rec, 454 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 455 { 456 pad_softc_t *sc __diagused; 457 458 sc = (pad_softc_t *)opaque; 459 460 KASSERT(mutex_owned(&sc->sc_lock)); 461 462 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 463 play, true, pfil) < 0) 464 return EINVAL; 465 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 466 rec, true, rfil) < 0) 467 return EINVAL; 468 469 if (pfil->req_size > 0) 470 play = &pfil->filters[0].param; 471 switch (play->encoding) { 472 case AUDIO_ENCODING_SLINEAR_LE: 473 if (play->precision == 16 && play->validbits == 16) 474 pfil->prepend(pfil, pad_swvol_filter_le, play); 475 break; 476 case AUDIO_ENCODING_SLINEAR_BE: 477 if (play->precision == 16 && play->validbits == 16) 478 pfil->prepend(pfil, pad_swvol_filter_be, play); 479 break; 480 default: 481 break; 482 } 483 484 return 0; 485 } 486 487 static int 488 pad_start_output(void *opaque, void *block, int blksize, 489 void (*intr)(void *), void *intrarg) 490 { 491 pad_softc_t *sc; 492 int err; 493 494 sc = (pad_softc_t *)opaque; 495 496 KASSERT(mutex_owned(&sc->sc_lock)); 497 if (!sc->sc_open) 498 return EIO; 499 500 sc->sc_intr = intr; 501 sc->sc_intrarg = intrarg; 502 sc->sc_blksize = blksize; 503 504 err = pad_add_block(sc, block, blksize); 505 506 cv_broadcast(&sc->sc_condvar); 507 508 return err; 509 } 510 511 static int 512 pad_start_input(void *opaque, void *block, int blksize, 513 void (*intr)(void *), void *intrarg) 514 { 515 pad_softc_t *sc __diagused; 516 517 sc = (pad_softc_t *)opaque; 518 519 KASSERT(mutex_owned(&sc->sc_lock)); 520 521 return EOPNOTSUPP; 522 } 523 524 static int 525 pad_halt_output(void *opaque) 526 { 527 pad_softc_t *sc; 528 529 sc = (pad_softc_t *)opaque; 530 531 KASSERT(mutex_owned(&sc->sc_lock)); 532 533 sc->sc_intr = NULL; 534 sc->sc_intrarg = NULL; 535 sc->sc_buflen = 0; 536 sc->sc_rpos = sc->sc_wpos = 0; 537 538 return 0; 539 } 540 541 static int 542 pad_halt_input(void *opaque) 543 { 544 pad_softc_t *sc __diagused; 545 546 sc = (pad_softc_t *)opaque; 547 548 KASSERT(mutex_owned(&sc->sc_lock)); 549 550 return 0; 551 } 552 553 static int 554 pad_getdev(void *opaque, struct audio_device *ret) 555 { 556 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 557 strlcpy(ret->version, osrelease, sizeof(ret->version)); 558 strlcpy(ret->config, "pad", sizeof(ret->config)); 559 560 return 0; 561 } 562 563 static int 564 pad_set_port(void *opaque, mixer_ctrl_t *mc) 565 { 566 pad_softc_t *sc; 567 568 sc = (pad_softc_t *)opaque; 569 570 KASSERT(mutex_owned(&sc->sc_lock)); 571 572 switch (mc->dev) { 573 case PAD_OUTPUT_MASTER_VOLUME: 574 case PAD_INPUT_DAC_VOLUME: 575 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 576 return 0; 577 } 578 579 return ENXIO; 580 } 581 582 static int 583 pad_get_port(void *opaque, mixer_ctrl_t *mc) 584 { 585 pad_softc_t *sc; 586 587 sc = (pad_softc_t *)opaque; 588 589 KASSERT(mutex_owned(&sc->sc_lock)); 590 591 switch (mc->dev) { 592 case PAD_OUTPUT_MASTER_VOLUME: 593 case PAD_INPUT_DAC_VOLUME: 594 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 595 return 0; 596 } 597 598 return ENXIO; 599 } 600 601 static int 602 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 603 { 604 pad_softc_t *sc __diagused; 605 606 sc = (pad_softc_t *)opaque; 607 608 KASSERT(mutex_owned(&sc->sc_lock)); 609 610 switch (di->index) { 611 case PAD_OUTPUT_CLASS: 612 di->mixer_class = PAD_OUTPUT_CLASS; 613 strcpy(di->label.name, AudioCoutputs); 614 di->type = AUDIO_MIXER_CLASS; 615 di->next = di->prev = AUDIO_MIXER_LAST; 616 return 0; 617 case PAD_INPUT_CLASS: 618 di->mixer_class = PAD_INPUT_CLASS; 619 strcpy(di->label.name, AudioCinputs); 620 di->type = AUDIO_MIXER_CLASS; 621 di->next = di->prev = AUDIO_MIXER_LAST; 622 return 0; 623 case PAD_OUTPUT_MASTER_VOLUME: 624 di->mixer_class = PAD_OUTPUT_CLASS; 625 strcpy(di->label.name, AudioNmaster); 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 case PAD_INPUT_DAC_VOLUME: 632 di->mixer_class = PAD_INPUT_CLASS; 633 strcpy(di->label.name, AudioNdac); 634 di->type = AUDIO_MIXER_VALUE; 635 di->next = di->prev = AUDIO_MIXER_LAST; 636 di->un.v.num_channels = 1; 637 strcpy(di->un.v.units.name, AudioNvolume); 638 return 0; 639 } 640 641 return ENXIO; 642 } 643 644 static int 645 pad_get_props(void *opaque) 646 { 647 pad_softc_t *sc __diagused; 648 649 sc = (pad_softc_t *)opaque; 650 651 KASSERT(mutex_owned(&sc->sc_lock)); 652 653 return 0; 654 } 655 656 static int 657 pad_round_blocksize(void *opaque, int blksize, int mode, 658 const audio_params_t *p) 659 { 660 pad_softc_t *sc __diagused; 661 662 sc = (pad_softc_t *)opaque; 663 KASSERT(mutex_owned(&sc->sc_lock)); 664 665 return PAD_BLKSIZE; 666 } 667 668 static void 669 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 670 { 671 pad_softc_t *sc; 672 673 sc = (pad_softc_t *)opaque; 674 675 *intr = &sc->sc_intr_lock; 676 *thread = &sc->sc_lock; 677 } 678 679 static stream_filter_t * 680 pad_swvol_filter_le(struct audio_softc *asc, 681 const audio_params_t *from, const audio_params_t *to) 682 { 683 auvolconv_filter_t *this; 684 device_t dev = audio_get_device(asc); 685 struct pad_softc *sc = device_private(dev); 686 687 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 688 this->base.base.fetch_to = auvolconv_slinear16_le_fetch_to; 689 this->base.dtor = pad_swvol_dtor; 690 this->base.set_fetcher = stream_filter_set_fetcher; 691 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 692 this->vol = &sc->sc_swvol; 693 694 return (stream_filter_t *)this; 695 } 696 697 static stream_filter_t * 698 pad_swvol_filter_be(struct audio_softc *asc, 699 const audio_params_t *from, const audio_params_t *to) 700 { 701 auvolconv_filter_t *this; 702 device_t dev = audio_get_device(asc); 703 struct pad_softc *sc = device_private(dev); 704 705 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 706 this->base.base.fetch_to = auvolconv_slinear16_be_fetch_to; 707 this->base.dtor = pad_swvol_dtor; 708 this->base.set_fetcher = stream_filter_set_fetcher; 709 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 710 this->vol = &sc->sc_swvol; 711 712 return (stream_filter_t *)this; 713 } 714 715 static void 716 pad_swvol_dtor(stream_filter_t *this) 717 { 718 if (this) 719 kmem_free(this, sizeof(auvolconv_filter_t)); 720 } 721 722 #ifdef _MODULE 723 724 MODULE(MODULE_CLASS_DRIVER, pad, "audio"); 725 726 static const struct cfiattrdata audiobuscf_iattrdata = { 727 "audiobus", 0, { { NULL, NULL, 0 }, } 728 }; 729 static const struct cfiattrdata * const pad_attrs[] = { 730 &audiobuscf_iattrdata, NULL 731 }; 732 733 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 734 extern struct cfattach pad_ca; 735 static int padloc[] = { -1, -1 }; 736 737 static struct cfdata pad_cfdata[] = { 738 { 739 .cf_name = "pad", 740 .cf_atname = "pad", 741 .cf_unit = 0, 742 .cf_fstate = FSTATE_STAR, 743 .cf_loc = padloc, 744 .cf_flags = 0, 745 .cf_pspec = NULL, 746 }, 747 { NULL, NULL, 0, 0, NULL, 0, NULL } 748 }; 749 750 static int 751 pad_modcmd(modcmd_t cmd, void *arg) 752 { 753 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 754 int error; 755 756 switch (cmd) { 757 case MODULE_CMD_INIT: 758 error = config_cfdriver_attach(&pad_cd); 759 if (error) { 760 return error; 761 } 762 763 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 764 if (error) { 765 config_cfdriver_detach(&pad_cd); 766 aprint_error("%s: unable to register cfattach\n", 767 pad_cd.cd_name); 768 769 return error; 770 } 771 772 error = config_cfdata_attach(pad_cfdata, 1); 773 if (error) { 774 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 775 config_cfdriver_detach(&pad_cd); 776 aprint_error("%s: unable to register cfdata\n", 777 pad_cd.cd_name); 778 779 return error; 780 } 781 782 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 783 &pad_cdevsw, &cmajor); 784 if (error) { 785 error = config_cfdata_detach(pad_cfdata); 786 if (error) { 787 return error; 788 } 789 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 790 config_cfdriver_detach(&pad_cd); 791 aprint_error("%s: unable to register devsw\n", 792 pad_cd.cd_name); 793 794 return error; 795 } 796 797 (void)config_attach_pseudo(pad_cfdata); 798 799 return 0; 800 case MODULE_CMD_FINI: 801 error = config_cfdata_detach(pad_cfdata); 802 if (error) { 803 return error; 804 } 805 806 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 807 config_cfdriver_detach(&pad_cd); 808 devsw_detach(NULL, &pad_cdevsw); 809 810 return 0; 811 default: 812 return ENOTTY; 813 } 814 } 815 816 #endif 817
Indexes created Thu Oct 02 10:09:58 GMT 2025