pad.c revision 1.25.2.3
1 /* $NetBSD: pad.c,v 1.25.2.3 2016/07/19 06:26:59 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 1.25.2.3 2016/07/19 06:26:59 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_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 .query_encoding = pad_query_encoding, 104 .set_params = pad_set_params, 105 .start_output = pad_start_output, 106 .start_input = pad_start_input, 107 .halt_output = pad_halt_output, 108 .halt_input = pad_halt_input, 109 .getdev = pad_getdev, 110 .set_port = pad_set_port, 111 .get_port = pad_get_port, 112 .query_devinfo = pad_query_devinfo, 113 .get_props = pad_get_props, 114 .round_blocksize = pad_round_blocksize, 115 .get_locks = pad_get_locks, 116 }; 117 118 #define PAD_NFORMATS 1 119 static const struct audio_format pad_formats[PAD_NFORMATS] = { 120 { NULL, AUMODE_PLAY|AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16, 121 2, AUFMT_STEREO, 1, { 44100 } }, 122 }; 123 124 extern void padattach(int); 125 126 static int pad_add_block(pad_softc_t *, uint8_t *, int); 127 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 128 129 dev_type_open(pad_open); 130 dev_type_close(pad_close); 131 dev_type_read(pad_read); 132 133 const struct cdevsw pad_cdevsw = { 134 LOCALCOUNT_INITIALIZER 135 .d_open = pad_open, 136 .d_close = pad_close, 137 .d_read = pad_read, 138 .d_write = nowrite, 139 .d_ioctl = noioctl, 140 .d_stop = nostop, 141 .d_tty = notty, 142 .d_poll = nopoll, 143 .d_mmap = nommap, 144 .d_kqfilter = nokqfilter, 145 .d_discard = nodiscard, 146 .d_flag = D_OTHER | D_MPSAFE, 147 }; 148 149 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 150 NULL, NULL, pad_childdet); 151 152 void 153 padattach(int n) 154 { 155 int i, err; 156 cfdata_t cf; 157 158 aprint_debug("pad: requested %d units\n", n); 159 160 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 161 if (err) { 162 aprint_error("%s: couldn't register cfattach: %d\n", 163 pad_cd.cd_name, err); 164 config_cfdriver_detach(&pad_cd); 165 return; 166 } 167 168 for (i = 0; i < n; i++) { 169 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 170 if (cf == NULL) { 171 aprint_error("%s: couldn't allocate cfdata\n", 172 pad_cd.cd_name); 173 continue; 174 } 175 cf->cf_name = pad_cd.cd_name; 176 cf->cf_atname = pad_cd.cd_name; 177 cf->cf_unit = i; 178 cf->cf_fstate = FSTATE_STAR; 179 180 (void)config_attach_pseudo(cf); 181 } 182 183 return; 184 } 185 186 static int 187 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 188 { 189 int l; 190 191 if (sc->sc_open == 0) 192 return EIO; 193 194 KASSERT(mutex_owned(&sc->sc_lock)); 195 196 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 197 return ENOBUFS; 198 199 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 200 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 201 else { 202 l = PAD_BUFSIZE - sc->sc_wpos; 203 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 204 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 205 } 206 207 sc->sc_wpos += blksize; 208 if (sc->sc_wpos > PAD_BUFSIZE) 209 sc->sc_wpos -= PAD_BUFSIZE; 210 211 sc->sc_buflen += blksize; 212 213 return 0; 214 } 215 216 static int 217 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 218 { 219 int l; 220 221 KASSERT(mutex_owned(&sc->sc_lock)); 222 KASSERT(pb != NULL); 223 224 if (sc->sc_buflen < blksize) 225 return ERESTART; 226 227 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 228 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 229 pb->pb_len = blksize; 230 sc->sc_rpos += blksize; 231 } else { 232 l = PAD_BUFSIZE - sc->sc_rpos; 233 pb->pb_len = l; 234 sc->sc_rpos = 0; 235 } 236 sc->sc_buflen -= pb->pb_len; 237 238 return 0; 239 } 240 241 static int 242 pad_match(device_t parent, cfdata_t data, void *opaque) 243 { 244 245 return 1; 246 } 247 248 static void 249 pad_childdet(device_t self, device_t child) 250 { 251 pad_softc_t *sc = device_private(self); 252 253 sc->sc_audiodev = NULL; 254 } 255 256 static void 257 pad_attach(device_t parent, device_t self, void *opaque) 258 { 259 pad_softc_t *sc = device_private(self); 260 261 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 262 263 sc->sc_dev = self; 264 sc->sc_open = 0; 265 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 266 &sc->sc_encodings) != 0) { 267 aprint_error_dev(self, "couldn't create encodings\n"); 268 return; 269 } 270 271 cv_init(&sc->sc_condvar, device_xname(self)); 272 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 273 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 274 275 sc->sc_swvol = 255; 276 sc->sc_buflen = 0; 277 sc->sc_rpos = sc->sc_wpos = 0; 278 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 279 280 if (!pmf_device_register(self, NULL, NULL)) 281 aprint_error_dev(self, "couldn't establish power handler\n"); 282 283 return; 284 } 285 286 static int 287 pad_detach(device_t self, int flags) 288 { 289 pad_softc_t *sc = device_private(self); 290 int cmaj, mn, rc; 291 292 cmaj = cdevsw_lookup_major(&pad_cdevsw); 293 mn = device_unit(self); 294 vdevgone(cmaj, mn, mn, VCHR); 295 296 if ((rc = config_detach_children(self, flags)) != 0) 297 return rc; 298 299 pmf_device_deregister(self); 300 301 mutex_destroy(&sc->sc_lock); 302 mutex_destroy(&sc->sc_intr_lock); 303 cv_destroy(&sc->sc_condvar); 304 305 auconv_delete_encodings(sc->sc_encodings); 306 307 return 0; 308 } 309 310 int 311 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 312 { 313 pad_softc_t *sc; 314 315 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 316 if (sc == NULL) 317 return ENXIO; 318 319 if (atomic_swap_uint(&sc->sc_open, 1) != 0) { 320 return EBUSY; 321 } 322 323 getmicrotime(&sc->sc_last); 324 sc->sc_bytes_count = 0; 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 (20 * 1000) 346 #define BYTESTOSLEEP (PAD_BYTES_PER_SEC / (1000000 / TIMENEXTREAD)) 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 mutex_enter(&sc->sc_lock); 366 intr = sc->sc_intr; 367 intrarg = sc->sc_intrarg; 368 369 while (uio->uio_resid > 0 && !err) { 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 sc->sc_bytes_count >= BYTESTOSLEEP) { 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_bytes_count -= BYTESTOSLEEP; 384 getmicrotime(&sc->sc_last); 385 } else if (sc->sc_bytes_count >= BYTESTOSLEEP) { 386 sc->sc_bytes_count -= BYTESTOSLEEP; 387 getmicrotime(&sc->sc_last); 388 } else if (lastusec + TIMENEXTREAD <= nowusec) 389 getmicrotime(&sc->sc_last); 390 391 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 392 if (!err) { 393 sc->sc_bytes_count += pb.pb_len; 394 395 mutex_exit(&sc->sc_lock); 396 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 397 mutex_enter(&sc->sc_lock); 398 continue; 399 } 400 401 if (intr) { 402 mutex_enter(&sc->sc_intr_lock); 403 kpreempt_disable(); 404 (*intr)(intrarg); 405 kpreempt_enable(); 406 mutex_exit(&sc->sc_intr_lock); 407 intr = sc->sc_intr; 408 intrarg = sc->sc_intrarg; 409 err = 0; 410 continue; 411 } 412 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 413 if (err != 0) 414 break; 415 416 intr = sc->sc_intr; 417 intrarg = sc->sc_intrarg; 418 } 419 mutex_exit(&sc->sc_lock); 420 421 return err; 422 } 423 424 static int 425 pad_query_encoding(void *opaque, struct audio_encoding *ae) 426 { 427 pad_softc_t *sc; 428 429 sc = (pad_softc_t *)opaque; 430 431 KASSERT(mutex_owned(&sc->sc_lock)); 432 433 return auconv_query_encoding(sc->sc_encodings, ae); 434 } 435 436 static int 437 pad_set_params(void *opaque, int setmode, int usemode, 438 audio_params_t *play, audio_params_t *rec, 439 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 440 { 441 pad_softc_t *sc __diagused; 442 443 sc = (pad_softc_t *)opaque; 444 445 KASSERT(mutex_owned(&sc->sc_lock)); 446 447 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 448 play, true, pfil) < 0) 449 return EINVAL; 450 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 451 rec, true, rfil) < 0) 452 return EINVAL; 453 454 if (pfil->req_size > 0) 455 play = &pfil->filters[0].param; 456 switch (play->encoding) { 457 case AUDIO_ENCODING_SLINEAR_LE: 458 if (play->precision == 16 && play->validbits == 16) 459 pfil->prepend(pfil, pad_swvol_filter_le, play); 460 break; 461 case AUDIO_ENCODING_SLINEAR_BE: 462 if (play->precision == 16 && play->validbits == 16) 463 pfil->prepend(pfil, pad_swvol_filter_be, play); 464 break; 465 default: 466 break; 467 } 468 469 return 0; 470 } 471 472 static int 473 pad_start_output(void *opaque, void *block, int blksize, 474 void (*intr)(void *), void *intrarg) 475 { 476 pad_softc_t *sc; 477 int err; 478 479 sc = (pad_softc_t *)opaque; 480 481 KASSERT(mutex_owned(&sc->sc_lock)); 482 483 sc->sc_intr = intr; 484 sc->sc_intrarg = intrarg; 485 sc->sc_blksize = blksize; 486 487 err = pad_add_block(sc, block, blksize); 488 489 cv_broadcast(&sc->sc_condvar); 490 491 return err; 492 } 493 494 static int 495 pad_start_input(void *opaque, void *block, int blksize, 496 void (*intr)(void *), void *intrarg) 497 { 498 pad_softc_t *sc __diagused; 499 500 sc = (pad_softc_t *)opaque; 501 502 KASSERT(mutex_owned(&sc->sc_lock)); 503 504 return EOPNOTSUPP; 505 } 506 507 static int 508 pad_halt_output(void *opaque) 509 { 510 pad_softc_t *sc; 511 512 sc = (pad_softc_t *)opaque; 513 514 KASSERT(mutex_owned(&sc->sc_lock)); 515 516 sc->sc_intr = NULL; 517 sc->sc_intrarg = NULL; 518 sc->sc_buflen = 0; 519 sc->sc_rpos = sc->sc_wpos = 0; 520 521 return 0; 522 } 523 524 static int 525 pad_halt_input(void *opaque) 526 { 527 pad_softc_t *sc __diagused; 528 529 sc = (pad_softc_t *)opaque; 530 531 KASSERT(mutex_owned(&sc->sc_lock)); 532 533 return 0; 534 } 535 536 static int 537 pad_getdev(void *opaque, struct audio_device *ret) 538 { 539 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 540 strlcpy(ret->version, osrelease, sizeof(ret->version)); 541 strlcpy(ret->config, "pad", sizeof(ret->config)); 542 543 return 0; 544 } 545 546 static int 547 pad_set_port(void *opaque, mixer_ctrl_t *mc) 548 { 549 pad_softc_t *sc; 550 551 sc = (pad_softc_t *)opaque; 552 553 KASSERT(mutex_owned(&sc->sc_lock)); 554 555 switch (mc->dev) { 556 case PAD_OUTPUT_MASTER_VOLUME: 557 case PAD_INPUT_DAC_VOLUME: 558 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 559 return 0; 560 } 561 562 return ENXIO; 563 } 564 565 static int 566 pad_get_port(void *opaque, mixer_ctrl_t *mc) 567 { 568 pad_softc_t *sc; 569 570 sc = (pad_softc_t *)opaque; 571 572 KASSERT(mutex_owned(&sc->sc_lock)); 573 574 switch (mc->dev) { 575 case PAD_OUTPUT_MASTER_VOLUME: 576 case PAD_INPUT_DAC_VOLUME: 577 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 578 return 0; 579 } 580 581 return ENXIO; 582 } 583 584 static int 585 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 586 { 587 pad_softc_t *sc __diagused; 588 589 sc = (pad_softc_t *)opaque; 590 591 KASSERT(mutex_owned(&sc->sc_lock)); 592 593 switch (di->index) { 594 case PAD_OUTPUT_CLASS: 595 di->mixer_class = PAD_OUTPUT_CLASS; 596 strcpy(di->label.name, AudioCoutputs); 597 di->type = AUDIO_MIXER_CLASS; 598 di->next = di->prev = AUDIO_MIXER_LAST; 599 return 0; 600 case PAD_INPUT_CLASS: 601 di->mixer_class = PAD_INPUT_CLASS; 602 strcpy(di->label.name, AudioCinputs); 603 di->type = AUDIO_MIXER_CLASS; 604 di->next = di->prev = AUDIO_MIXER_LAST; 605 return 0; 606 case PAD_OUTPUT_MASTER_VOLUME: 607 di->mixer_class = PAD_OUTPUT_CLASS; 608 strcpy(di->label.name, AudioNmaster); 609 di->type = AUDIO_MIXER_VALUE; 610 di->next = di->prev = AUDIO_MIXER_LAST; 611 di->un.v.num_channels = 1; 612 strcpy(di->un.v.units.name, AudioNvolume); 613 return 0; 614 case PAD_INPUT_DAC_VOLUME: 615 di->mixer_class = PAD_INPUT_CLASS; 616 strcpy(di->label.name, AudioNdac); 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 } 623 624 return ENXIO; 625 } 626 627 static int 628 pad_get_props(void *opaque) 629 { 630 pad_softc_t *sc __diagused; 631 632 sc = (pad_softc_t *)opaque; 633 634 KASSERT(mutex_owned(&sc->sc_lock)); 635 636 return 0; 637 } 638 639 static int 640 pad_round_blocksize(void *opaque, int blksize, int mode, 641 const audio_params_t *p) 642 { 643 pad_softc_t *sc __diagused; 644 645 sc = (pad_softc_t *)opaque; 646 KASSERT(mutex_owned(&sc->sc_lock)); 647 648 return PAD_BLKSIZE; 649 } 650 651 static void 652 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 653 { 654 pad_softc_t *sc; 655 656 sc = (pad_softc_t *)opaque; 657 658 *intr = &sc->sc_intr_lock; 659 *thread = &sc->sc_lock; 660 } 661 662 static stream_filter_t * 663 pad_swvol_filter_le(struct audio_softc *asc, 664 const audio_params_t *from, const audio_params_t *to) 665 { 666 auvolconv_filter_t *this; 667 device_t dev = audio_get_device(asc); 668 struct pad_softc *sc = device_private(dev); 669 670 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 671 this->base.base.fetch_to = auvolconv_slinear16_le_fetch_to; 672 this->base.dtor = pad_swvol_dtor; 673 this->base.set_fetcher = stream_filter_set_fetcher; 674 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 675 this->vol = &sc->sc_swvol; 676 677 return (stream_filter_t *)this; 678 } 679 680 static stream_filter_t * 681 pad_swvol_filter_be(struct audio_softc *asc, 682 const audio_params_t *from, const audio_params_t *to) 683 { 684 auvolconv_filter_t *this; 685 device_t dev = audio_get_device(asc); 686 struct pad_softc *sc = device_private(dev); 687 688 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 689 this->base.base.fetch_to = auvolconv_slinear16_be_fetch_to; 690 this->base.dtor = pad_swvol_dtor; 691 this->base.set_fetcher = stream_filter_set_fetcher; 692 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 693 this->vol = &sc->sc_swvol; 694 695 return (stream_filter_t *)this; 696 } 697 698 static void 699 pad_swvol_dtor(stream_filter_t *this) 700 { 701 if (this) 702 kmem_free(this, sizeof(auvolconv_filter_t)); 703 } 704 705 #ifdef _MODULE 706 707 MODULE(MODULE_CLASS_DRIVER, pad, NULL); 708 709 static const struct cfiattrdata audiobuscf_iattrdata = { 710 "audiobus", 0, { { NULL, NULL, 0 }, } 711 }; 712 static const struct cfiattrdata * const pad_attrs[] = { 713 &audiobuscf_iattrdata, NULL 714 }; 715 716 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 717 extern struct cfattach pad_ca; 718 static int padloc[] = { -1, -1 }; 719 720 static struct cfdata pad_cfdata[] = { 721 { 722 .cf_name = "pad", 723 .cf_atname = "pad", 724 .cf_unit = 0, 725 .cf_fstate = FSTATE_STAR, 726 .cf_loc = padloc, 727 .cf_flags = 0, 728 .cf_pspec = NULL, 729 }, 730 { NULL, NULL, 0, 0, NULL, 0, NULL } 731 }; 732 733 static int 734 pad_modcmd(modcmd_t cmd, void *arg) 735 { 736 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 737 int error; 738 739 switch (cmd) { 740 case MODULE_CMD_INIT: 741 error = config_cfdriver_attach(&pad_cd); 742 if (error) { 743 return error; 744 } 745 746 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 747 if (error) { 748 config_cfdriver_detach(&pad_cd); 749 aprint_error("%s: unable to register cfattach\n", 750 pad_cd.cd_name); 751 752 return error; 753 } 754 755 error = config_cfdata_attach(pad_cfdata, 1); 756 if (error) { 757 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 758 config_cfdriver_detach(&pad_cd); 759 aprint_error("%s: unable to register cfdata\n", 760 pad_cd.cd_name); 761 762 return error; 763 } 764 765 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 766 &pad_cdevsw, &cmajor); 767 if (error) { 768 error = config_cfdata_detach(pad_cfdata); 769 if (error) { 770 return error; 771 } 772 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 773 config_cfdriver_detach(&pad_cd); 774 aprint_error("%s: unable to register devsw\n", 775 pad_cd.cd_name); 776 777 return error; 778 } 779 780 (void)config_attach_pseudo(pad_cfdata); 781 782 return 0; 783 case MODULE_CMD_FINI: 784 error = config_cfdata_detach(pad_cfdata); 785 if (error) { 786 return error; 787 } 788 789 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 790 config_cfdriver_detach(&pad_cd); 791 devsw_detach(NULL, &pad_cdevsw); 792 793 return 0; 794 default: 795 return ENOTTY; 796 } 797 } 798 799 #endif 800
Indexes created Fri Oct 17 09:09:57 GMT 2025