pad.c revision 1.56
1 /* $NetBSD: pad.c,v 1.56 2018/09/23 23:34:45 kre 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 1.56 2018/09/23 23:34:45 kre 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, uio->uio_resid < PAD_BLKSIZE ? 391 (int)uio->uio_resid : PAD_BLKSIZE); 392 if (!err) { 393 getmicrotime(&sc->sc_last); 394 sc->sc_bytes_count += pb.pb_len; 395 mutex_exit(&sc->sc_lock); 396 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 397 continue; 398 } 399 400 if (intr) { 401 mutex_enter(&sc->sc_intr_lock); 402 kpreempt_disable(); 403 (*intr)(intrarg); 404 kpreempt_enable(); 405 mutex_exit(&sc->sc_intr_lock); 406 intr = sc->sc_intr; 407 intrarg = sc->sc_intrarg; 408 err = 0; 409 mutex_exit(&sc->sc_lock); 410 continue; 411 } 412 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 413 if (err != 0) { 414 mutex_exit(&sc->sc_lock); 415 break; 416 } 417 418 mutex_exit(&sc->sc_lock); 419 } 420 421 return err; 422 } 423 424 static int 425 pad_audio_open(void *opaque, int flags) 426 { 427 pad_softc_t *sc; 428 sc = opaque; 429 430 if (sc->sc_open == 0) 431 return EIO; 432 433 getmicrotime(&sc->sc_last); 434 sc->sc_bytes_count = 0; 435 sc->sc_remainder = 0; 436 437 return 0; 438 } 439 440 static int 441 pad_query_encoding(void *opaque, struct audio_encoding *ae) 442 { 443 pad_softc_t *sc; 444 445 sc = (pad_softc_t *)opaque; 446 447 KASSERT(mutex_owned(&sc->sc_lock)); 448 449 return auconv_query_encoding(sc->sc_encodings, ae); 450 } 451 452 static int 453 pad_set_params(void *opaque, int setmode, int usemode, 454 audio_params_t *play, audio_params_t *rec, 455 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 456 { 457 pad_softc_t *sc __diagused; 458 459 sc = (pad_softc_t *)opaque; 460 461 KASSERT(mutex_owned(&sc->sc_lock)); 462 463 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 464 play, true, pfil) < 0) 465 return EINVAL; 466 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 467 rec, true, rfil) < 0) 468 return EINVAL; 469 470 if (pfil->req_size > 0) 471 play = &pfil->filters[0].param; 472 switch (play->encoding) { 473 case AUDIO_ENCODING_SLINEAR_LE: 474 if (play->precision == 16 && play->validbits == 16) 475 pfil->prepend(pfil, pad_swvol_filter_le, play); 476 break; 477 case AUDIO_ENCODING_SLINEAR_BE: 478 if (play->precision == 16 && play->validbits == 16) 479 pfil->prepend(pfil, pad_swvol_filter_be, play); 480 break; 481 default: 482 break; 483 } 484 485 return 0; 486 } 487 488 static int 489 pad_start_output(void *opaque, void *block, int blksize, 490 void (*intr)(void *), void *intrarg) 491 { 492 pad_softc_t *sc; 493 int err; 494 495 sc = (pad_softc_t *)opaque; 496 497 KASSERT(mutex_owned(&sc->sc_lock)); 498 if (!sc->sc_open) 499 return EIO; 500 501 sc->sc_intr = intr; 502 sc->sc_intrarg = intrarg; 503 sc->sc_blksize = blksize; 504 505 err = pad_add_block(sc, block, blksize); 506 507 cv_broadcast(&sc->sc_condvar); 508 509 return err; 510 } 511 512 static int 513 pad_start_input(void *opaque, void *block, int blksize, 514 void (*intr)(void *), void *intrarg) 515 { 516 pad_softc_t *sc __diagused; 517 518 sc = (pad_softc_t *)opaque; 519 520 KASSERT(mutex_owned(&sc->sc_lock)); 521 522 return EOPNOTSUPP; 523 } 524 525 static int 526 pad_halt_output(void *opaque) 527 { 528 pad_softc_t *sc; 529 530 sc = (pad_softc_t *)opaque; 531 532 KASSERT(mutex_owned(&sc->sc_lock)); 533 534 sc->sc_intr = NULL; 535 sc->sc_intrarg = NULL; 536 sc->sc_buflen = 0; 537 sc->sc_rpos = sc->sc_wpos = 0; 538 539 return 0; 540 } 541 542 static int 543 pad_halt_input(void *opaque) 544 { 545 pad_softc_t *sc __diagused; 546 547 sc = (pad_softc_t *)opaque; 548 549 KASSERT(mutex_owned(&sc->sc_lock)); 550 551 return 0; 552 } 553 554 static int 555 pad_getdev(void *opaque, struct audio_device *ret) 556 { 557 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 558 strlcpy(ret->version, osrelease, sizeof(ret->version)); 559 strlcpy(ret->config, "pad", sizeof(ret->config)); 560 561 return 0; 562 } 563 564 static int 565 pad_set_port(void *opaque, mixer_ctrl_t *mc) 566 { 567 pad_softc_t *sc; 568 569 sc = (pad_softc_t *)opaque; 570 571 KASSERT(mutex_owned(&sc->sc_lock)); 572 573 switch (mc->dev) { 574 case PAD_OUTPUT_MASTER_VOLUME: 575 case PAD_INPUT_DAC_VOLUME: 576 if (mc->un.value.num_channels != 1) 577 return EINVAL; 578 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 579 return 0; 580 } 581 582 return ENXIO; 583 } 584 585 static int 586 pad_get_port(void *opaque, mixer_ctrl_t *mc) 587 { 588 pad_softc_t *sc; 589 590 sc = (pad_softc_t *)opaque; 591 592 KASSERT(mutex_owned(&sc->sc_lock)); 593 594 switch (mc->dev) { 595 case PAD_OUTPUT_MASTER_VOLUME: 596 case PAD_INPUT_DAC_VOLUME: 597 if (mc->un.value.num_channels != 1) 598 return EINVAL; 599 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 600 return 0; 601 } 602 603 return ENXIO; 604 } 605 606 static int 607 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 608 { 609 pad_softc_t *sc __diagused; 610 611 sc = (pad_softc_t *)opaque; 612 613 KASSERT(mutex_owned(&sc->sc_lock)); 614 615 switch (di->index) { 616 case PAD_OUTPUT_CLASS: 617 di->mixer_class = PAD_OUTPUT_CLASS; 618 strcpy(di->label.name, AudioCoutputs); 619 di->type = AUDIO_MIXER_CLASS; 620 di->next = di->prev = AUDIO_MIXER_LAST; 621 return 0; 622 case PAD_INPUT_CLASS: 623 di->mixer_class = PAD_INPUT_CLASS; 624 strcpy(di->label.name, AudioCinputs); 625 di->type = AUDIO_MIXER_CLASS; 626 di->next = di->prev = AUDIO_MIXER_LAST; 627 return 0; 628 case PAD_OUTPUT_MASTER_VOLUME: 629 di->mixer_class = PAD_OUTPUT_CLASS; 630 strcpy(di->label.name, AudioNmaster); 631 di->type = AUDIO_MIXER_VALUE; 632 di->next = di->prev = AUDIO_MIXER_LAST; 633 di->un.v.num_channels = 1; 634 strcpy(di->un.v.units.name, AudioNvolume); 635 return 0; 636 case PAD_INPUT_DAC_VOLUME: 637 di->mixer_class = PAD_INPUT_CLASS; 638 strcpy(di->label.name, AudioNdac); 639 di->type = AUDIO_MIXER_VALUE; 640 di->next = di->prev = AUDIO_MIXER_LAST; 641 di->un.v.num_channels = 1; 642 strcpy(di->un.v.units.name, AudioNvolume); 643 return 0; 644 } 645 646 return ENXIO; 647 } 648 649 static int 650 pad_get_props(void *opaque) 651 { 652 pad_softc_t *sc __diagused; 653 654 sc = (pad_softc_t *)opaque; 655 656 KASSERT(mutex_owned(&sc->sc_lock)); 657 658 return 0; 659 } 660 661 static int 662 pad_round_blocksize(void *opaque, int blksize, int mode, 663 const audio_params_t *p) 664 { 665 pad_softc_t *sc __diagused; 666 667 sc = (pad_softc_t *)opaque; 668 KASSERT(mutex_owned(&sc->sc_lock)); 669 670 return PAD_BLKSIZE; 671 } 672 673 static void 674 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 675 { 676 pad_softc_t *sc; 677 678 sc = (pad_softc_t *)opaque; 679 680 *intr = &sc->sc_intr_lock; 681 *thread = &sc->sc_lock; 682 } 683 684 static stream_filter_t * 685 pad_swvol_filter_le(struct audio_softc *asc, 686 const audio_params_t *from, const audio_params_t *to) 687 { 688 auvolconv_filter_t *this; 689 device_t dev = audio_get_device(asc); 690 struct pad_softc *sc = device_private(dev); 691 692 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 693 this->base.base.fetch_to = auvolconv_slinear16_le_fetch_to; 694 this->base.dtor = pad_swvol_dtor; 695 this->base.set_fetcher = stream_filter_set_fetcher; 696 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 697 this->vol = &sc->sc_swvol; 698 699 return (stream_filter_t *)this; 700 } 701 702 static stream_filter_t * 703 pad_swvol_filter_be(struct audio_softc *asc, 704 const audio_params_t *from, const audio_params_t *to) 705 { 706 auvolconv_filter_t *this; 707 device_t dev = audio_get_device(asc); 708 struct pad_softc *sc = device_private(dev); 709 710 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 711 this->base.base.fetch_to = auvolconv_slinear16_be_fetch_to; 712 this->base.dtor = pad_swvol_dtor; 713 this->base.set_fetcher = stream_filter_set_fetcher; 714 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 715 this->vol = &sc->sc_swvol; 716 717 return (stream_filter_t *)this; 718 } 719 720 static void 721 pad_swvol_dtor(stream_filter_t *this) 722 { 723 if (this) 724 kmem_free(this, sizeof(auvolconv_filter_t)); 725 } 726 727 MODULE(MODULE_CLASS_DRIVER, pad, "audio"); 728 729 #ifdef _MODULE 730 731 static const struct cfiattrdata audiobuscf_iattrdata = { 732 "audiobus", 0, { { NULL, NULL, 0 }, } 733 }; 734 static const struct cfiattrdata * const pad_attrs[] = { 735 &audiobuscf_iattrdata, NULL 736 }; 737 738 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 739 extern struct cfattach pad_ca; 740 static int padloc[] = { -1, -1 }; 741 742 static struct cfdata pad_cfdata[] = { 743 { 744 .cf_name = "pad", 745 .cf_atname = "pad", 746 .cf_unit = 0, 747 .cf_fstate = FSTATE_STAR, 748 .cf_loc = padloc, 749 .cf_flags = 0, 750 .cf_pspec = NULL, 751 }, 752 { NULL, NULL, 0, 0, NULL, 0, NULL } 753 }; 754 #endif 755 756 static int 757 pad_modcmd(modcmd_t cmd, void *arg) 758 { 759 #ifdef _MODULE 760 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 761 #endif 762 int error = 0; 763 764 switch (cmd) { 765 case MODULE_CMD_INIT: 766 #ifdef _MODULE 767 error = config_cfdriver_attach(&pad_cd); 768 if (error) { 769 break; 770 } 771 772 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 773 if (error) { 774 config_cfdriver_detach(&pad_cd); 775 aprint_error("%s: unable to register cfattach\n", 776 pad_cd.cd_name); 777 778 break; 779 } 780 781 error = config_cfdata_attach(pad_cfdata, 1); 782 if (error) { 783 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 784 config_cfdriver_detach(&pad_cd); 785 aprint_error("%s: unable to register cfdata\n", 786 pad_cd.cd_name); 787 788 break; 789 } 790 791 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 792 &pad_cdevsw, &cmajor); 793 if (error) { 794 config_cfdata_detach(pad_cfdata); 795 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 796 config_cfdriver_detach(&pad_cd); 797 aprint_error("%s: unable to register devsw\n", 798 pad_cd.cd_name); 799 800 break; 801 } 802 803 (void)config_attach_pseudo(pad_cfdata); 804 #endif 805 806 break; 807 case MODULE_CMD_FINI: 808 #ifdef _MODULE 809 error = config_cfdata_detach(pad_cfdata); 810 if (error) { 811 break; 812 } 813 814 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 815 config_cfdriver_detach(&pad_cd); 816 devsw_detach(NULL, &pad_cdevsw); 817 #endif 818 819 break; 820 default: 821 error = ENOTTY; 822 } 823 824 return error; 825 } 826
Indexes created Wed Oct 22 06:10:02 GMT 2025