pad.c revision 1.40
1 /* $NetBSD: pad.c,v 1.40 2017/07/02 05:59:27 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 1.40 2017/07/02 05:59:27 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/file.h> 37 #include <sys/filedesc.h> 38 #include <sys/vnode.h> 39 #include <sys/kauth.h> 40 #include <sys/kmem.h> 41 #include <sys/kernel.h> 42 #include <sys/device.h> 43 #include <sys/proc.h> 44 #include <sys/condvar.h> 45 #include <sys/select.h> 46 #include <sys/stat.h> 47 #include <sys/audioio.h> 48 #include <sys/vnode.h> 49 #include <sys/module.h> 50 #include <sys/atomic.h> 51 #include <sys/time.h> 52 53 #include <dev/audio_if.h> 54 #include <dev/audiovar.h> 55 #include <dev/auconv.h> 56 #include <dev/auvolconv.h> 57 58 #include <dev/pad/padvar.h> 59 60 #define MAXDEVS 128 61 #define PADUNIT(x) minor(x) 62 63 #define PADFREQ 44100 64 #define PADCHAN 2 65 #define PADPREC 16 66 #define PADENC AUDIO_ENCODING_SLINEAR_LE 67 68 extern struct cfdriver pad_cd; 69 70 typedef struct pad_block { 71 uint8_t *pb_ptr; 72 int pb_len; 73 } pad_block_t; 74 75 enum { 76 PAD_OUTPUT_CLASS, 77 PAD_INPUT_CLASS, 78 PAD_OUTPUT_MASTER_VOLUME, 79 PAD_INPUT_DAC_VOLUME, 80 PAD_ENUM_LAST, 81 }; 82 83 static int pad_match(device_t, cfdata_t, void *); 84 static void pad_attach(device_t, device_t, void *); 85 static int pad_detach(device_t, int); 86 static void pad_childdet(device_t, device_t); 87 88 static int pad_audio_open(void *, int); 89 static int pad_query_encoding(void *, struct audio_encoding *); 90 static int pad_set_params(void *, int, int, 91 audio_params_t *, audio_params_t *, 92 stream_filter_list_t *, stream_filter_list_t *); 93 static int pad_start_output(void *, void *, int, 94 void (*)(void *), void *); 95 static int pad_start_input(void *, void *, int, 96 void (*)(void *), void *); 97 static int pad_halt_output(void *); 98 static int pad_halt_input(void *); 99 static int pad_getdev(void *, struct audio_device *); 100 static int pad_set_port(void *, mixer_ctrl_t *); 101 static int pad_get_port(void *, mixer_ctrl_t *); 102 static int pad_query_devinfo(void *, mixer_devinfo_t *); 103 static int pad_get_props(void *); 104 static int pad_round_blocksize(void *, int, int, const audio_params_t *); 105 static void pad_get_locks(void *, kmutex_t **, kmutex_t **); 106 107 static stream_filter_t *pad_swvol_filter_le(struct audio_softc *, 108 const audio_params_t *, const audio_params_t *); 109 static stream_filter_t *pad_swvol_filter_be(struct audio_softc *, 110 const audio_params_t *, const audio_params_t *); 111 static void pad_swvol_dtor(stream_filter_t *); 112 113 static int pad_close(struct file *); 114 static int pad_read(struct file *, off_t *, struct uio *, kauth_cred_t, int); 115 static int pad_write(struct file *, off_t *, struct uio *, kauth_cred_t, int); 116 static int pad_ioctl(struct file *, u_long, void *); 117 static int pad_kqfilter(struct file *, struct knote *); 118 static int pad_poll(struct file *, int); 119 static int pad_stat(struct file *, struct stat *); 120 static int pad_mmap(struct file *, off_t *, size_t, int, int *, int *, 121 struct uvm_object **, int *); 122 123 static const struct audio_hw_if pad_hw_if = { 124 .open = pad_audio_open, 125 .query_encoding = pad_query_encoding, 126 .set_params = pad_set_params, 127 .start_output = pad_start_output, 128 .start_input = pad_start_input, 129 .halt_output = pad_halt_output, 130 .halt_input = pad_halt_input, 131 .getdev = pad_getdev, 132 .set_port = pad_set_port, 133 .get_port = pad_get_port, 134 .query_devinfo = pad_query_devinfo, 135 .get_props = pad_get_props, 136 .round_blocksize = pad_round_blocksize, 137 .get_locks = pad_get_locks, 138 }; 139 140 #define PAD_NFORMATS 1 141 static const struct audio_format pad_formats[PAD_NFORMATS] = { 142 { NULL, AUMODE_PLAY|AUMODE_RECORD, PADENC, PADPREC, PADPREC, 143 PADCHAN, AUFMT_STEREO, 1, { PADFREQ } }, 144 }; 145 146 extern void padattach(int); 147 148 static int pad_add_block(pad_softc_t *, uint8_t *, int); 149 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 150 151 dev_type_open(pad_open); 152 153 const struct cdevsw pad_cdevsw = { 154 .d_open = pad_open, 155 .d_close = noclose, 156 .d_read = noread, 157 .d_write = nowrite, 158 .d_ioctl = noioctl, 159 .d_stop = nostop, 160 .d_tty = notty, 161 .d_poll = nopoll, 162 .d_mmap = nommap, 163 .d_kqfilter = nokqfilter, 164 .d_discard = nodiscard, 165 .d_flag = D_OTHER | D_MPSAFE, 166 }; 167 168 const struct fileops pad_fileops = { 169 .fo_read = pad_read, 170 .fo_write = pad_write, 171 .fo_ioctl = pad_ioctl, 172 .fo_fcntl = fnullop_fcntl, 173 .fo_stat = pad_stat, 174 .fo_poll = pad_poll, 175 .fo_close = pad_close, 176 .fo_mmap = pad_mmap, 177 .fo_kqfilter = pad_kqfilter, 178 .fo_restart = fnullop_restart 179 }; 180 181 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 182 NULL, NULL, pad_childdet); 183 184 void 185 padattach(int n) 186 { 187 int error; 188 189 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 190 if (error) { 191 aprint_error("%s: couldn't register cfattach: %d\n", 192 pad_cd.cd_name, error); 193 config_cfdriver_detach(&pad_cd); 194 return; 195 } 196 197 return; 198 } 199 200 static int 201 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 202 { 203 int l; 204 205 if (sc->sc_open == 0) 206 return EIO; 207 208 KASSERT(mutex_owned(&sc->sc_lock)); 209 210 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 211 return ENOBUFS; 212 213 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 214 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 215 else { 216 l = PAD_BUFSIZE - sc->sc_wpos; 217 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 218 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 219 } 220 221 sc->sc_wpos += blksize; 222 if (sc->sc_wpos > PAD_BUFSIZE) 223 sc->sc_wpos -= PAD_BUFSIZE; 224 225 sc->sc_buflen += blksize; 226 227 return 0; 228 } 229 230 static int 231 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 232 { 233 int l; 234 235 KASSERT(mutex_owned(&sc->sc_lock)); 236 KASSERT(pb != NULL); 237 238 if (sc->sc_buflen < blksize) 239 return ERESTART; 240 241 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 242 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 243 pb->pb_len = blksize; 244 sc->sc_rpos += blksize; 245 } else { 246 l = PAD_BUFSIZE - sc->sc_rpos; 247 pb->pb_len = l; 248 sc->sc_rpos = 0; 249 } 250 sc->sc_buflen -= pb->pb_len; 251 252 return 0; 253 } 254 255 static int 256 pad_match(device_t parent, cfdata_t data, void *opaque) 257 { 258 259 return 1; 260 } 261 262 static void 263 pad_childdet(device_t self, device_t child) 264 { 265 pad_softc_t *sc = device_private(self); 266 267 sc->sc_audiodev = NULL; 268 } 269 270 static void 271 pad_attach(device_t parent, device_t self, void *opaque) 272 { 273 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 274 275 return; 276 } 277 278 static int 279 pad_detach(device_t self, int flags) 280 { 281 pad_softc_t *sc; 282 int cmaj, mn, rc; 283 284 sc = device_private(self); 285 config_deactivate(sc->sc_audiodev); 286 287 /* Start draining existing accessors of the device. */ 288 if ((rc = config_detach_children(self, flags)) != 0) 289 return rc; 290 291 mutex_enter(&sc->sc_lock); 292 sc->sc_dying = true; 293 cv_broadcast(&sc->sc_condvar); 294 mutex_exit(&sc->sc_lock); 295 296 KASSERT(sc->sc_open > 0); 297 sc->sc_open = 0; 298 299 cmaj = cdevsw_lookup_major(&pad_cdevsw); 300 mn = device_unit(sc->sc_dev); 301 vdevgone(cmaj, mn, mn, VCHR); 302 303 pmf_device_deregister(sc->sc_dev); 304 305 mutex_destroy(&sc->sc_lock); 306 mutex_destroy(&sc->sc_intr_lock); 307 cv_destroy(&sc->sc_condvar); 308 309 auconv_delete_encodings(sc->sc_encodings); 310 311 return rc; 312 } 313 314 int 315 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 316 { 317 pad_softc_t *sc; 318 struct file *fp; 319 device_t paddev; 320 cfdata_t cf; 321 int error, fd, i; 322 323 for (i = 0; i < MAXDEVS; i++) { 324 if (device_lookup(&pad_cd, i) == NULL) 325 break; 326 } 327 if (i == MAXDEVS) 328 return ENXIO; 329 330 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 331 cf->cf_name = pad_cd.cd_name; 332 cf->cf_atname = pad_cd.cd_name; 333 cf->cf_unit = i; 334 cf->cf_fstate = FSTATE_STAR; 335 336 paddev = config_attach_pseudo(cf); 337 sc = device_private(paddev); 338 sc->sc_dev = paddev; 339 sc->sc_dying = false; 340 341 if (sc->sc_open == 1) 342 return EBUSY; 343 344 error = fd_allocfile(&fp, &fd); 345 if (error) { 346 config_detach(sc->sc_dev, 0); 347 return error; 348 } 349 350 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 351 &sc->sc_encodings) != 0) { 352 aprint_error_dev(sc->sc_dev, "couldn't create encodings\n"); 353 config_detach(sc->sc_dev, 0); 354 return EINVAL; 355 } 356 357 cv_init(&sc->sc_condvar, device_xname(sc->sc_dev)); 358 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 359 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 360 361 sc->sc_swvol = 255; 362 sc->sc_buflen = 0; 363 sc->sc_rpos = sc->sc_wpos = 0; 364 sc->sc_audiodev = audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 365 366 if (!pmf_device_register(sc->sc_dev, NULL, NULL)) 367 aprint_error_dev(sc->sc_dev, "couldn't establish power handler\n"); 368 369 error = fd_clone(fp, fd, flags, &pad_fileops, sc); 370 KASSERT(error == EMOVEFD); 371 372 sc->sc_open = 1; 373 374 return error; 375 } 376 377 static int 378 pad_close(struct file *fp) 379 { 380 pad_softc_t *sc; 381 382 sc = fp->f_pad; 383 if (sc == NULL) 384 return ENXIO; 385 386 config_detach(sc->sc_dev, DETACH_FORCE); 387 388 fp->f_pad = NULL; 389 390 return 0; 391 } 392 393 static int 394 pad_poll(struct file *fp, int events) 395 { 396 return ENODEV; 397 } 398 399 static int 400 pad_kqfilter(struct file *fp, struct knote *kn) 401 { 402 struct pad_softc *sc; 403 dev_t dev; 404 405 sc = fp->f_pad; 406 if (sc == NULL) 407 return EIO; 408 409 dev = makedev(cdevsw_lookup_major(&pad_cdevsw), device_unit(sc->sc_dev)); 410 411 return seltrue_kqfilter(dev, kn); 412 } 413 414 static int 415 pad_ioctl(struct file *fp, u_long cmd, void *data) 416 { 417 return ENODEV; 418 } 419 420 static int 421 pad_stat(struct file *fp, struct stat *st) 422 { 423 struct pad_softc *sc; 424 425 sc = fp->f_pad; 426 if (sc == NULL) 427 return EIO; 428 429 memset(st, 0, sizeof(*st)); 430 431 st->st_dev = makedev(cdevsw_lookup_major(&pad_cdevsw), device_unit(sc->sc_dev)); 432 433 st->st_uid = kauth_cred_geteuid(fp->f_cred); 434 st->st_gid = kauth_cred_getegid(fp->f_cred); 435 st->st_mode = S_IFCHR; 436 437 return 0; 438 } 439 440 static int 441 pad_mmap(struct file *fp, off_t *offp, size_t len, int prot, int *flagsp, 442 int *advicep, struct uvm_object **uobjp, int *maxprotp) 443 { 444 return 1; 445 } 446 447 #define PAD_BYTES_PER_SEC (PADFREQ * PADPREC / NBBY * PADCHAN) 448 #define BYTESTOSLEEP (int64_t)(PAD_BLKSIZE) 449 #define TIMENEXTREAD (int64_t)(BYTESTOSLEEP * 1000000 / PAD_BYTES_PER_SEC) 450 451 static int 452 pad_read(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 453 int ioflag) 454 { 455 struct timeval now; 456 uint64_t nowusec, lastusec; 457 pad_softc_t *sc; 458 pad_block_t pb; 459 void (*intr)(void *); 460 void *intrarg; 461 int err, wait_ticks; 462 463 sc = fp->f_pad; 464 if (sc == NULL) 465 return ENXIO; 466 467 err = 0; 468 469 while (uio->uio_resid > 0 && !err) { 470 mutex_enter(&sc->sc_lock); 471 if (sc->sc_dying == true) { 472 mutex_exit(&sc->sc_lock); 473 return EIO; 474 } 475 intr = sc->sc_intr; 476 intrarg = sc->sc_intrarg; 477 478 getmicrotime(&now); 479 nowusec = (now.tv_sec * 1000000) + now.tv_usec; 480 lastusec = (sc->sc_last.tv_sec * 1000000) + 481 sc->sc_last.tv_usec; 482 if (lastusec + TIMENEXTREAD > nowusec) { 483 if (sc->sc_bytes_count >= BYTESTOSLEEP) { 484 sc->sc_remainder += 485 ((lastusec + TIMENEXTREAD) - nowusec); 486 } 487 488 wait_ticks = (hz * sc->sc_remainder) / 1000000; 489 if (wait_ticks > 0) { 490 sc->sc_remainder -= wait_ticks * 1000000 / hz; 491 err = kpause("padwait", TRUE, wait_ticks, 492 &sc->sc_lock); 493 if (err != EWOULDBLOCK) { 494 mutex_exit(&sc->sc_lock); 495 continue; 496 } 497 } 498 } 499 500 if (sc->sc_bytes_count >= BYTESTOSLEEP) 501 sc->sc_bytes_count -= BYTESTOSLEEP; 502 503 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 504 if (!err) { 505 getmicrotime(&sc->sc_last); 506 sc->sc_bytes_count += pb.pb_len; 507 mutex_exit(&sc->sc_lock); 508 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 509 continue; 510 } 511 512 if (intr) { 513 mutex_enter(&sc->sc_intr_lock); 514 kpreempt_disable(); 515 (*intr)(intrarg); 516 kpreempt_enable(); 517 mutex_exit(&sc->sc_intr_lock); 518 intr = sc->sc_intr; 519 intrarg = sc->sc_intrarg; 520 err = 0; 521 mutex_exit(&sc->sc_lock); 522 continue; 523 } 524 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 525 if (err != 0) { 526 mutex_exit(&sc->sc_lock); 527 break; 528 } 529 530 mutex_exit(&sc->sc_lock); 531 } 532 533 return err; 534 } 535 536 static int 537 pad_write(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 538 int ioflag) 539 { 540 return EOPNOTSUPP; 541 } 542 543 static int 544 pad_audio_open(void *opaque, int flags) 545 { 546 pad_softc_t *sc; 547 sc = opaque; 548 549 if (sc->sc_open == 0) 550 return EIO; 551 552 getmicrotime(&sc->sc_last); 553 sc->sc_bytes_count = 0; 554 sc->sc_remainder = 0; 555 556 return 0; 557 } 558 559 static int 560 pad_query_encoding(void *opaque, struct audio_encoding *ae) 561 { 562 pad_softc_t *sc; 563 564 sc = (pad_softc_t *)opaque; 565 566 KASSERT(mutex_owned(&sc->sc_lock)); 567 568 return auconv_query_encoding(sc->sc_encodings, ae); 569 } 570 571 static int 572 pad_set_params(void *opaque, int setmode, int usemode, 573 audio_params_t *play, audio_params_t *rec, 574 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 575 { 576 pad_softc_t *sc __diagused; 577 578 sc = (pad_softc_t *)opaque; 579 580 KASSERT(mutex_owned(&sc->sc_lock)); 581 582 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 583 play, true, pfil) < 0) 584 return EINVAL; 585 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 586 rec, true, rfil) < 0) 587 return EINVAL; 588 589 if (pfil->req_size > 0) 590 play = &pfil->filters[0].param; 591 switch (play->encoding) { 592 case AUDIO_ENCODING_SLINEAR_LE: 593 if (play->precision == 16 && play->validbits == 16) 594 pfil->prepend(pfil, pad_swvol_filter_le, play); 595 break; 596 case AUDIO_ENCODING_SLINEAR_BE: 597 if (play->precision == 16 && play->validbits == 16) 598 pfil->prepend(pfil, pad_swvol_filter_be, play); 599 break; 600 default: 601 break; 602 } 603 604 return 0; 605 } 606 607 static int 608 pad_start_output(void *opaque, void *block, int blksize, 609 void (*intr)(void *), void *intrarg) 610 { 611 pad_softc_t *sc; 612 int err; 613 614 sc = (pad_softc_t *)opaque; 615 616 KASSERT(mutex_owned(&sc->sc_lock)); 617 if (!sc->sc_open) 618 return EIO; 619 620 sc->sc_intr = intr; 621 sc->sc_intrarg = intrarg; 622 sc->sc_blksize = blksize; 623 624 err = pad_add_block(sc, block, blksize); 625 626 cv_broadcast(&sc->sc_condvar); 627 628 return err; 629 } 630 631 static int 632 pad_start_input(void *opaque, void *block, int blksize, 633 void (*intr)(void *), void *intrarg) 634 { 635 pad_softc_t *sc __diagused; 636 637 sc = (pad_softc_t *)opaque; 638 639 KASSERT(mutex_owned(&sc->sc_lock)); 640 641 return EOPNOTSUPP; 642 } 643 644 static int 645 pad_halt_output(void *opaque) 646 { 647 pad_softc_t *sc; 648 649 sc = (pad_softc_t *)opaque; 650 651 KASSERT(mutex_owned(&sc->sc_lock)); 652 653 sc->sc_intr = NULL; 654 sc->sc_intrarg = NULL; 655 sc->sc_buflen = 0; 656 sc->sc_rpos = sc->sc_wpos = 0; 657 658 return 0; 659 } 660 661 static int 662 pad_halt_input(void *opaque) 663 { 664 pad_softc_t *sc __diagused; 665 666 sc = (pad_softc_t *)opaque; 667 668 KASSERT(mutex_owned(&sc->sc_lock)); 669 670 return 0; 671 } 672 673 static int 674 pad_getdev(void *opaque, struct audio_device *ret) 675 { 676 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 677 strlcpy(ret->version, osrelease, sizeof(ret->version)); 678 strlcpy(ret->config, "pad", sizeof(ret->config)); 679 680 return 0; 681 } 682 683 static int 684 pad_set_port(void *opaque, mixer_ctrl_t *mc) 685 { 686 pad_softc_t *sc; 687 688 sc = (pad_softc_t *)opaque; 689 690 KASSERT(mutex_owned(&sc->sc_lock)); 691 692 switch (mc->dev) { 693 case PAD_OUTPUT_MASTER_VOLUME: 694 case PAD_INPUT_DAC_VOLUME: 695 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 696 return 0; 697 } 698 699 return ENXIO; 700 } 701 702 static int 703 pad_get_port(void *opaque, mixer_ctrl_t *mc) 704 { 705 pad_softc_t *sc; 706 707 sc = (pad_softc_t *)opaque; 708 709 KASSERT(mutex_owned(&sc->sc_lock)); 710 711 switch (mc->dev) { 712 case PAD_OUTPUT_MASTER_VOLUME: 713 case PAD_INPUT_DAC_VOLUME: 714 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 715 return 0; 716 } 717 718 return ENXIO; 719 } 720 721 static int 722 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 723 { 724 pad_softc_t *sc __diagused; 725 726 sc = (pad_softc_t *)opaque; 727 728 KASSERT(mutex_owned(&sc->sc_lock)); 729 730 switch (di->index) { 731 case PAD_OUTPUT_CLASS: 732 di->mixer_class = PAD_OUTPUT_CLASS; 733 strcpy(di->label.name, AudioCoutputs); 734 di->type = AUDIO_MIXER_CLASS; 735 di->next = di->prev = AUDIO_MIXER_LAST; 736 return 0; 737 case PAD_INPUT_CLASS: 738 di->mixer_class = PAD_INPUT_CLASS; 739 strcpy(di->label.name, AudioCinputs); 740 di->type = AUDIO_MIXER_CLASS; 741 di->next = di->prev = AUDIO_MIXER_LAST; 742 return 0; 743 case PAD_OUTPUT_MASTER_VOLUME: 744 di->mixer_class = PAD_OUTPUT_CLASS; 745 strcpy(di->label.name, AudioNmaster); 746 di->type = AUDIO_MIXER_VALUE; 747 di->next = di->prev = AUDIO_MIXER_LAST; 748 di->un.v.num_channels = 1; 749 strcpy(di->un.v.units.name, AudioNvolume); 750 return 0; 751 case PAD_INPUT_DAC_VOLUME: 752 di->mixer_class = PAD_INPUT_CLASS; 753 strcpy(di->label.name, AudioNdac); 754 di->type = AUDIO_MIXER_VALUE; 755 di->next = di->prev = AUDIO_MIXER_LAST; 756 di->un.v.num_channels = 1; 757 strcpy(di->un.v.units.name, AudioNvolume); 758 return 0; 759 } 760 761 return ENXIO; 762 } 763 764 static int 765 pad_get_props(void *opaque) 766 { 767 pad_softc_t *sc __diagused; 768 769 sc = (pad_softc_t *)opaque; 770 771 KASSERT(mutex_owned(&sc->sc_lock)); 772 773 return 0; 774 } 775 776 static int 777 pad_round_blocksize(void *opaque, int blksize, int mode, 778 const audio_params_t *p) 779 { 780 pad_softc_t *sc __diagused; 781 782 sc = (pad_softc_t *)opaque; 783 KASSERT(mutex_owned(&sc->sc_lock)); 784 785 return PAD_BLKSIZE; 786 } 787 788 static void 789 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 790 { 791 pad_softc_t *sc; 792 793 sc = (pad_softc_t *)opaque; 794 795 *intr = &sc->sc_intr_lock; 796 *thread = &sc->sc_lock; 797 } 798 799 static stream_filter_t * 800 pad_swvol_filter_le(struct audio_softc *asc, 801 const audio_params_t *from, const audio_params_t *to) 802 { 803 auvolconv_filter_t *this; 804 device_t dev = audio_get_device(asc); 805 struct pad_softc *sc = device_private(dev); 806 807 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 808 this->base.base.fetch_to = auvolconv_slinear16_le_fetch_to; 809 this->base.dtor = pad_swvol_dtor; 810 this->base.set_fetcher = stream_filter_set_fetcher; 811 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 812 this->vol = &sc->sc_swvol; 813 814 return (stream_filter_t *)this; 815 } 816 817 static stream_filter_t * 818 pad_swvol_filter_be(struct audio_softc *asc, 819 const audio_params_t *from, const audio_params_t *to) 820 { 821 auvolconv_filter_t *this; 822 device_t dev = audio_get_device(asc); 823 struct pad_softc *sc = device_private(dev); 824 825 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 826 this->base.base.fetch_to = auvolconv_slinear16_be_fetch_to; 827 this->base.dtor = pad_swvol_dtor; 828 this->base.set_fetcher = stream_filter_set_fetcher; 829 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 830 this->vol = &sc->sc_swvol; 831 832 return (stream_filter_t *)this; 833 } 834 835 static void 836 pad_swvol_dtor(stream_filter_t *this) 837 { 838 if (this) 839 kmem_free(this, sizeof(auvolconv_filter_t)); 840 } 841 842 #ifdef _MODULE 843 844 MODULE(MODULE_CLASS_DRIVER, pad, "audio"); 845 846 static const struct cfiattrdata audiobuscf_iattrdata = { 847 "audiobus", 0, { { NULL, NULL, 0 }, } 848 }; 849 static const struct cfiattrdata * const pad_attrs[] = { 850 &audiobuscf_iattrdata, NULL 851 }; 852 853 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 854 extern struct cfattach pad_ca; 855 static int padloc[] = { -1, -1 }; 856 857 static struct cfdata pad_cfdata[] = { 858 { 859 .cf_name = "pad", 860 .cf_atname = "pad", 861 .cf_unit = 0, 862 .cf_fstate = FSTATE_STAR, 863 .cf_loc = padloc, 864 .cf_flags = 0, 865 .cf_pspec = NULL, 866 }, 867 { NULL, NULL, 0, 0, NULL, 0, NULL } 868 }; 869 870 static int 871 pad_modcmd(modcmd_t cmd, void *arg) 872 { 873 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 874 int error; 875 876 switch (cmd) { 877 case MODULE_CMD_INIT: 878 error = config_cfdriver_attach(&pad_cd); 879 if (error) { 880 return error; 881 } 882 883 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 884 if (error) { 885 config_cfdriver_detach(&pad_cd); 886 aprint_error("%s: unable to register cfattach\n", 887 pad_cd.cd_name); 888 889 return error; 890 } 891 892 error = config_cfdata_attach(pad_cfdata, 1); 893 if (error) { 894 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 895 config_cfdriver_detach(&pad_cd); 896 aprint_error("%s: unable to register cfdata\n", 897 pad_cd.cd_name); 898 899 return error; 900 } 901 902 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 903 &pad_cdevsw, &cmajor); 904 if (error) { 905 error = config_cfdata_detach(pad_cfdata); 906 if (error) { 907 return error; 908 } 909 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 910 config_cfdriver_detach(&pad_cd); 911 aprint_error("%s: unable to register devsw\n", 912 pad_cd.cd_name); 913 914 return error; 915 } 916 917 (void)config_attach_pseudo(pad_cfdata); 918 919 return 0; 920 case MODULE_CMD_FINI: 921 error = config_cfdata_detach(pad_cfdata); 922 if (error) { 923 return error; 924 } 925 926 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 927 config_cfdriver_detach(&pad_cd); 928 devsw_detach(NULL, &pad_cdevsw); 929 930 return 0; 931 default: 932 return ENOTTY; 933 } 934 } 935 936 #endif 937
Indexes created Thu Oct 02 10:09:58 GMT 2025