pad.c revision 1.37
1 /* $NetBSD: pad.c,v 1.37 2017/06/19 23:54:00 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 1.37 2017/06/19 23:54:00 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 #define PADFREQ 44100 58 #define PADCHAN 2 59 #define PADPREC 16 60 #define PADENC AUDIO_ENCODING_SLINEAR_LE 61 62 extern struct cfdriver pad_cd; 63 64 typedef struct pad_block { 65 uint8_t *pb_ptr; 66 int pb_len; 67 } pad_block_t; 68 69 enum { 70 PAD_OUTPUT_CLASS, 71 PAD_INPUT_CLASS, 72 PAD_OUTPUT_MASTER_VOLUME, 73 PAD_INPUT_DAC_VOLUME, 74 PAD_ENUM_LAST, 75 }; 76 77 static int pad_match(device_t, cfdata_t, void *); 78 static void pad_attach(device_t, device_t, void *); 79 static int pad_detach(device_t, int); 80 static void pad_childdet(device_t, device_t); 81 82 static int pad_audio_open(void *, int); 83 static int pad_query_encoding(void *, struct audio_encoding *); 84 static int pad_set_params(void *, int, int, 85 audio_params_t *, audio_params_t *, 86 stream_filter_list_t *, stream_filter_list_t *); 87 static int pad_start_output(void *, void *, int, 88 void (*)(void *), void *); 89 static int pad_start_input(void *, void *, int, 90 void (*)(void *), void *); 91 static int pad_halt_output(void *); 92 static int pad_halt_input(void *); 93 static int pad_getdev(void *, struct audio_device *); 94 static int pad_set_port(void *, mixer_ctrl_t *); 95 static int pad_get_port(void *, mixer_ctrl_t *); 96 static int pad_query_devinfo(void *, mixer_devinfo_t *); 97 static int pad_get_props(void *); 98 static int pad_round_blocksize(void *, int, int, const audio_params_t *); 99 static void pad_get_locks(void *, kmutex_t **, kmutex_t **); 100 101 static stream_filter_t *pad_swvol_filter_le(struct audio_softc *, 102 const audio_params_t *, const audio_params_t *); 103 static stream_filter_t *pad_swvol_filter_be(struct audio_softc *, 104 const audio_params_t *, const audio_params_t *); 105 static void pad_swvol_dtor(stream_filter_t *); 106 107 static bool pad_is_attached; /* Do we have an audio* child? */ 108 109 static const struct audio_hw_if pad_hw_if = { 110 .open = pad_audio_open, 111 .query_encoding = pad_query_encoding, 112 .set_params = pad_set_params, 113 .start_output = pad_start_output, 114 .start_input = pad_start_input, 115 .halt_output = pad_halt_output, 116 .halt_input = pad_halt_input, 117 .getdev = pad_getdev, 118 .set_port = pad_set_port, 119 .get_port = pad_get_port, 120 .query_devinfo = pad_query_devinfo, 121 .get_props = pad_get_props, 122 .round_blocksize = pad_round_blocksize, 123 .get_locks = pad_get_locks, 124 }; 125 126 #define PAD_NFORMATS 1 127 static const struct audio_format pad_formats[PAD_NFORMATS] = { 128 { NULL, AUMODE_PLAY|AUMODE_RECORD, PADENC, PADPREC, PADPREC, 129 PADCHAN, AUFMT_STEREO, 1, { PADFREQ } }, 130 }; 131 132 extern void padattach(int); 133 134 static int pad_add_block(pad_softc_t *, uint8_t *, int); 135 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 136 137 dev_type_open(pad_open); 138 dev_type_close(pad_close); 139 dev_type_read(pad_read); 140 141 const struct cdevsw pad_cdevsw = { 142 .d_open = pad_open, 143 .d_close = pad_close, 144 .d_read = pad_read, 145 .d_write = nowrite, 146 .d_ioctl = noioctl, 147 .d_stop = nostop, 148 .d_tty = notty, 149 .d_poll = nopoll, 150 .d_mmap = nommap, 151 .d_kqfilter = nokqfilter, 152 .d_discard = nodiscard, 153 .d_flag = D_OTHER | D_MPSAFE, 154 }; 155 156 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 157 NULL, NULL, pad_childdet); 158 159 void 160 padattach(int n) 161 { 162 int i, err; 163 cfdata_t cf; 164 165 aprint_debug("pad: requested %d units\n", n); 166 167 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 168 if (err) { 169 aprint_error("%s: couldn't register cfattach: %d\n", 170 pad_cd.cd_name, err); 171 config_cfdriver_detach(&pad_cd); 172 return; 173 } 174 175 for (i = 0; i < n; i++) { 176 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 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 pad_is_attached = true; 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 if (!pad_is_attached) 296 return ENXIO; 297 298 cmaj = cdevsw_lookup_major(&pad_cdevsw); 299 mn = device_unit(self); 300 vdevgone(cmaj, mn, mn, VCHR); 301 302 if ((rc = config_detach_children(self, flags)) != 0) 303 return rc; 304 305 pmf_device_deregister(self); 306 307 mutex_destroy(&sc->sc_lock); 308 mutex_destroy(&sc->sc_intr_lock); 309 cv_destroy(&sc->sc_condvar); 310 311 auconv_delete_encodings(sc->sc_encodings); 312 313 pad_is_attached = false; 314 return 0; 315 } 316 317 int 318 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 319 { 320 pad_softc_t *sc; 321 322 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 323 if (sc == NULL) 324 return ENXIO; 325 326 if (atomic_swap_uint(&sc->sc_open, 1) != 0) 327 return EBUSY; 328 329 return 0; 330 } 331 332 int 333 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 334 { 335 pad_softc_t *sc; 336 337 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 338 if (sc == NULL) 339 return ENXIO; 340 341 KASSERT(sc->sc_open > 0); 342 sc->sc_open = 0; 343 344 return 0; 345 } 346 347 #define PAD_BYTES_PER_SEC (PADFREQ * PADPREC / NBBY * PADCHAN) 348 #define BYTESTOSLEEP (int64_t)(PAD_BLKSIZE) 349 #define TIMENEXTREAD (int64_t)(BYTESTOSLEEP * 1000000 / PAD_BYTES_PER_SEC) 350 351 int 352 pad_read(dev_t dev, struct uio *uio, int flags) 353 { 354 struct timeval now; 355 uint64_t nowusec, lastusec; 356 pad_softc_t *sc; 357 pad_block_t pb; 358 void (*intr)(void *); 359 void *intrarg; 360 int err, wait_ticks; 361 362 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 363 if (sc == NULL) 364 return ENXIO; 365 366 err = 0; 367 368 while (uio->uio_resid > 0 && !err) { 369 mutex_enter(&sc->sc_lock); 370 intr = sc->sc_intr; 371 intrarg = sc->sc_intrarg; 372 373 getmicrotime(&now); 374 nowusec = (now.tv_sec * 1000000) + now.tv_usec; 375 lastusec = (sc->sc_last.tv_sec * 1000000) + 376 sc->sc_last.tv_usec; 377 if (lastusec + TIMENEXTREAD > nowusec) { 378 if (sc->sc_bytes_count >= BYTESTOSLEEP) { 379 sc->sc_remainder += 380 ((lastusec + TIMENEXTREAD) - nowusec); 381 } 382 383 wait_ticks = (hz * sc->sc_remainder) / 1000000; 384 if (wait_ticks > 0) { 385 sc->sc_remainder -= wait_ticks * 1000000 / hz; 386 kpause("padwait", TRUE, wait_ticks, 387 &sc->sc_lock); 388 } 389 } 390 391 if (sc->sc_bytes_count >= BYTESTOSLEEP) 392 sc->sc_bytes_count -= BYTESTOSLEEP; 393 394 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 395 if (!err) { 396 getmicrotime(&sc->sc_last); 397 sc->sc_bytes_count += pb.pb_len; 398 mutex_exit(&sc->sc_lock); 399 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 400 continue; 401 } 402 403 if (intr) { 404 mutex_enter(&sc->sc_intr_lock); 405 kpreempt_disable(); 406 (*intr)(intrarg); 407 kpreempt_enable(); 408 mutex_exit(&sc->sc_intr_lock); 409 intr = sc->sc_intr; 410 intrarg = sc->sc_intrarg; 411 err = 0; 412 mutex_exit(&sc->sc_lock); 413 continue; 414 } 415 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 416 if (err != 0) { 417 mutex_exit(&sc->sc_lock); 418 break; 419 } 420 421 mutex_exit(&sc->sc_lock); 422 } 423 424 return err; 425 } 426 427 static int 428 pad_audio_open(void *opaque, int flags) 429 { 430 pad_softc_t *sc; 431 sc = opaque; 432 433 if (sc->sc_open == 0) 434 return EIO; 435 436 getmicrotime(&sc->sc_last); 437 sc->sc_bytes_count = 0; 438 sc->sc_remainder = 0; 439 440 return 0; 441 } 442 443 static int 444 pad_query_encoding(void *opaque, struct audio_encoding *ae) 445 { 446 pad_softc_t *sc; 447 448 sc = (pad_softc_t *)opaque; 449 450 KASSERT(mutex_owned(&sc->sc_lock)); 451 452 return auconv_query_encoding(sc->sc_encodings, ae); 453 } 454 455 static int 456 pad_set_params(void *opaque, int setmode, int usemode, 457 audio_params_t *play, audio_params_t *rec, 458 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 459 { 460 pad_softc_t *sc __diagused; 461 462 sc = (pad_softc_t *)opaque; 463 464 KASSERT(mutex_owned(&sc->sc_lock)); 465 466 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 467 play, true, pfil) < 0) 468 return EINVAL; 469 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 470 rec, true, rfil) < 0) 471 return EINVAL; 472 473 if (pfil->req_size > 0) 474 play = &pfil->filters[0].param; 475 switch (play->encoding) { 476 case AUDIO_ENCODING_SLINEAR_LE: 477 if (play->precision == 16 && play->validbits == 16) 478 pfil->prepend(pfil, pad_swvol_filter_le, play); 479 break; 480 case AUDIO_ENCODING_SLINEAR_BE: 481 if (play->precision == 16 && play->validbits == 16) 482 pfil->prepend(pfil, pad_swvol_filter_be, play); 483 break; 484 default: 485 break; 486 } 487 488 return 0; 489 } 490 491 static int 492 pad_start_output(void *opaque, void *block, int blksize, 493 void (*intr)(void *), void *intrarg) 494 { 495 pad_softc_t *sc; 496 int err; 497 498 sc = (pad_softc_t *)opaque; 499 500 KASSERT(mutex_owned(&sc->sc_lock)); 501 if (!sc->sc_open) 502 return EIO; 503 504 sc->sc_intr = intr; 505 sc->sc_intrarg = intrarg; 506 sc->sc_blksize = blksize; 507 508 err = pad_add_block(sc, block, blksize); 509 510 cv_broadcast(&sc->sc_condvar); 511 512 return err; 513 } 514 515 static int 516 pad_start_input(void *opaque, void *block, int blksize, 517 void (*intr)(void *), void *intrarg) 518 { 519 pad_softc_t *sc __diagused; 520 521 sc = (pad_softc_t *)opaque; 522 523 KASSERT(mutex_owned(&sc->sc_lock)); 524 525 return EOPNOTSUPP; 526 } 527 528 static int 529 pad_halt_output(void *opaque) 530 { 531 pad_softc_t *sc; 532 533 sc = (pad_softc_t *)opaque; 534 535 KASSERT(mutex_owned(&sc->sc_lock)); 536 537 sc->sc_intr = NULL; 538 sc->sc_intrarg = NULL; 539 sc->sc_buflen = 0; 540 sc->sc_rpos = sc->sc_wpos = 0; 541 542 return 0; 543 } 544 545 static int 546 pad_halt_input(void *opaque) 547 { 548 pad_softc_t *sc __diagused; 549 550 sc = (pad_softc_t *)opaque; 551 552 KASSERT(mutex_owned(&sc->sc_lock)); 553 554 return 0; 555 } 556 557 static int 558 pad_getdev(void *opaque, struct audio_device *ret) 559 { 560 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 561 strlcpy(ret->version, osrelease, sizeof(ret->version)); 562 strlcpy(ret->config, "pad", sizeof(ret->config)); 563 564 return 0; 565 } 566 567 static int 568 pad_set_port(void *opaque, mixer_ctrl_t *mc) 569 { 570 pad_softc_t *sc; 571 572 sc = (pad_softc_t *)opaque; 573 574 KASSERT(mutex_owned(&sc->sc_lock)); 575 576 switch (mc->dev) { 577 case PAD_OUTPUT_MASTER_VOLUME: 578 case PAD_INPUT_DAC_VOLUME: 579 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 580 return 0; 581 } 582 583 return ENXIO; 584 } 585 586 static int 587 pad_get_port(void *opaque, mixer_ctrl_t *mc) 588 { 589 pad_softc_t *sc; 590 591 sc = (pad_softc_t *)opaque; 592 593 KASSERT(mutex_owned(&sc->sc_lock)); 594 595 switch (mc->dev) { 596 case PAD_OUTPUT_MASTER_VOLUME: 597 case PAD_INPUT_DAC_VOLUME: 598 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 599 return 0; 600 } 601 602 return ENXIO; 603 } 604 605 static int 606 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 607 { 608 pad_softc_t *sc __diagused; 609 610 sc = (pad_softc_t *)opaque; 611 612 KASSERT(mutex_owned(&sc->sc_lock)); 613 614 switch (di->index) { 615 case PAD_OUTPUT_CLASS: 616 di->mixer_class = PAD_OUTPUT_CLASS; 617 strcpy(di->label.name, AudioCoutputs); 618 di->type = AUDIO_MIXER_CLASS; 619 di->next = di->prev = AUDIO_MIXER_LAST; 620 return 0; 621 case PAD_INPUT_CLASS: 622 di->mixer_class = PAD_INPUT_CLASS; 623 strcpy(di->label.name, AudioCinputs); 624 di->type = AUDIO_MIXER_CLASS; 625 di->next = di->prev = AUDIO_MIXER_LAST; 626 return 0; 627 case PAD_OUTPUT_MASTER_VOLUME: 628 di->mixer_class = PAD_OUTPUT_CLASS; 629 strcpy(di->label.name, AudioNmaster); 630 di->type = AUDIO_MIXER_VALUE; 631 di->next = di->prev = AUDIO_MIXER_LAST; 632 di->un.v.num_channels = 1; 633 strcpy(di->un.v.units.name, AudioNvolume); 634 return 0; 635 case PAD_INPUT_DAC_VOLUME: 636 di->mixer_class = PAD_INPUT_CLASS; 637 strcpy(di->label.name, AudioNdac); 638 di->type = AUDIO_MIXER_VALUE; 639 di->next = di->prev = AUDIO_MIXER_LAST; 640 di->un.v.num_channels = 1; 641 strcpy(di->un.v.units.name, AudioNvolume); 642 return 0; 643 } 644 645 return ENXIO; 646 } 647 648 static int 649 pad_get_props(void *opaque) 650 { 651 pad_softc_t *sc __diagused; 652 653 sc = (pad_softc_t *)opaque; 654 655 KASSERT(mutex_owned(&sc->sc_lock)); 656 657 return 0; 658 } 659 660 static int 661 pad_round_blocksize(void *opaque, int blksize, int mode, 662 const audio_params_t *p) 663 { 664 pad_softc_t *sc __diagused; 665 666 sc = (pad_softc_t *)opaque; 667 KASSERT(mutex_owned(&sc->sc_lock)); 668 669 return PAD_BLKSIZE; 670 } 671 672 static void 673 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 674 { 675 pad_softc_t *sc; 676 677 sc = (pad_softc_t *)opaque; 678 679 *intr = &sc->sc_intr_lock; 680 *thread = &sc->sc_lock; 681 } 682 683 static stream_filter_t * 684 pad_swvol_filter_le(struct audio_softc *asc, 685 const audio_params_t *from, const audio_params_t *to) 686 { 687 auvolconv_filter_t *this; 688 device_t dev = audio_get_device(asc); 689 struct pad_softc *sc = device_private(dev); 690 691 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 692 this->base.base.fetch_to = auvolconv_slinear16_le_fetch_to; 693 this->base.dtor = pad_swvol_dtor; 694 this->base.set_fetcher = stream_filter_set_fetcher; 695 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 696 this->vol = &sc->sc_swvol; 697 698 return (stream_filter_t *)this; 699 } 700 701 static stream_filter_t * 702 pad_swvol_filter_be(struct audio_softc *asc, 703 const audio_params_t *from, const audio_params_t *to) 704 { 705 auvolconv_filter_t *this; 706 device_t dev = audio_get_device(asc); 707 struct pad_softc *sc = device_private(dev); 708 709 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 710 this->base.base.fetch_to = auvolconv_slinear16_be_fetch_to; 711 this->base.dtor = pad_swvol_dtor; 712 this->base.set_fetcher = stream_filter_set_fetcher; 713 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 714 this->vol = &sc->sc_swvol; 715 716 return (stream_filter_t *)this; 717 } 718 719 static void 720 pad_swvol_dtor(stream_filter_t *this) 721 { 722 if (this) 723 kmem_free(this, sizeof(auvolconv_filter_t)); 724 } 725 726 #ifdef _MODULE 727 728 MODULE(MODULE_CLASS_DRIVER, pad, "audio"); 729 730 static const struct cfiattrdata audiobuscf_iattrdata = { 731 "audiobus", 0, { { NULL, NULL, 0 }, } 732 }; 733 static const struct cfiattrdata * const pad_attrs[] = { 734 &audiobuscf_iattrdata, NULL 735 }; 736 737 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 738 extern struct cfattach pad_ca; 739 static int padloc[] = { -1, -1 }; 740 741 static struct cfdata pad_cfdata[] = { 742 { 743 .cf_name = "pad", 744 .cf_atname = "pad", 745 .cf_unit = 0, 746 .cf_fstate = FSTATE_STAR, 747 .cf_loc = padloc, 748 .cf_flags = 0, 749 .cf_pspec = NULL, 750 }, 751 { NULL, NULL, 0, 0, NULL, 0, NULL } 752 }; 753 754 static int 755 pad_modcmd(modcmd_t cmd, void *arg) 756 { 757 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 758 int error; 759 760 switch (cmd) { 761 case MODULE_CMD_INIT: 762 error = config_cfdriver_attach(&pad_cd); 763 if (error) { 764 return error; 765 } 766 767 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 768 if (error) { 769 config_cfdriver_detach(&pad_cd); 770 aprint_error("%s: unable to register cfattach\n", 771 pad_cd.cd_name); 772 773 return error; 774 } 775 776 error = config_cfdata_attach(pad_cfdata, 1); 777 if (error) { 778 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 779 config_cfdriver_detach(&pad_cd); 780 aprint_error("%s: unable to register cfdata\n", 781 pad_cd.cd_name); 782 783 return error; 784 } 785 786 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 787 &pad_cdevsw, &cmajor); 788 if (error) { 789 error = config_cfdata_detach(pad_cfdata); 790 if (error) { 791 return error; 792 } 793 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 794 config_cfdriver_detach(&pad_cd); 795 aprint_error("%s: unable to register devsw\n", 796 pad_cd.cd_name); 797 798 return error; 799 } 800 801 (void)config_attach_pseudo(pad_cfdata); 802 803 return 0; 804 case MODULE_CMD_FINI: 805 error = config_cfdata_detach(pad_cfdata); 806 if (error) { 807 return error; 808 } 809 810 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 811 config_cfdriver_detach(&pad_cd); 812 devsw_detach(NULL, &pad_cdevsw); 813 814 return 0; 815 default: 816 return ENOTTY; 817 } 818 } 819 820 #endif 821
Indexes created Thu Oct 02 14:10:14 GMT 2025