pad.c revision 1.45
1 /* $NetBSD: pad.c,v 1.45 2017/12/15 23:57:42 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 1.45 2017/12/15 23:57:42 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/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 PADCLONER 254 62 #define PADUNIT(x) minor(x) 63 64 #define PADFREQ 44100 65 #define PADCHAN 2 66 #define PADPREC 16 67 #define PADENC AUDIO_ENCODING_SLINEAR_LE 68 69 extern struct cfdriver pad_cd; 70 71 typedef struct pad_block { 72 uint8_t *pb_ptr; 73 int pb_len; 74 } pad_block_t; 75 76 enum { 77 PAD_OUTPUT_CLASS, 78 PAD_INPUT_CLASS, 79 PAD_OUTPUT_MASTER_VOLUME, 80 PAD_INPUT_DAC_VOLUME, 81 PAD_ENUM_LAST, 82 }; 83 84 static int pad_match(device_t, cfdata_t, void *); 85 static void pad_attach(device_t, device_t, void *); 86 static int pad_detach(device_t, int); 87 static void pad_childdet(device_t, device_t); 88 89 static int pad_audio_open(void *, int); 90 static int pad_query_encoding(void *, struct audio_encoding *); 91 static int pad_set_params(void *, int, int, 92 audio_params_t *, audio_params_t *, 93 stream_filter_list_t *, stream_filter_list_t *); 94 static int pad_start_output(void *, void *, int, 95 void (*)(void *), void *); 96 static int pad_start_input(void *, void *, int, 97 void (*)(void *), void *); 98 static int pad_halt_output(void *); 99 static int pad_halt_input(void *); 100 static int pad_getdev(void *, struct audio_device *); 101 static int pad_set_port(void *, mixer_ctrl_t *); 102 static int pad_get_port(void *, mixer_ctrl_t *); 103 static int pad_query_devinfo(void *, mixer_devinfo_t *); 104 static int pad_get_props(void *); 105 static int pad_round_blocksize(void *, int, int, const audio_params_t *); 106 static void pad_get_locks(void *, kmutex_t **, kmutex_t **); 107 108 static stream_filter_t *pad_swvol_filter_le(struct audio_softc *, 109 const audio_params_t *, const audio_params_t *); 110 static stream_filter_t *pad_swvol_filter_be(struct audio_softc *, 111 const audio_params_t *, const audio_params_t *); 112 static void pad_swvol_dtor(stream_filter_t *); 113 114 static int pad_close(struct pad_softc *); 115 static int pad_read(struct pad_softc *, off_t *, struct uio *, kauth_cred_t, int); 116 117 static int fops_pad_close(struct file *); 118 static int fops_pad_read(struct file *, off_t *, struct uio *, kauth_cred_t, int); 119 static int pad_write(struct file *, off_t *, struct uio *, kauth_cred_t, int); 120 static int pad_ioctl(struct file *, u_long, void *); 121 static int pad_kqfilter(struct file *, struct knote *); 122 static int pad_poll(struct file *, int); 123 static int pad_stat(struct file *, struct stat *); 124 static int pad_mmap(struct file *, off_t *, size_t, int, int *, int *, 125 struct uvm_object **, int *); 126 127 static const struct audio_hw_if pad_hw_if = { 128 .open = pad_audio_open, 129 .query_encoding = pad_query_encoding, 130 .set_params = pad_set_params, 131 .start_output = pad_start_output, 132 .start_input = pad_start_input, 133 .halt_output = pad_halt_output, 134 .halt_input = pad_halt_input, 135 .getdev = pad_getdev, 136 .set_port = pad_set_port, 137 .get_port = pad_get_port, 138 .query_devinfo = pad_query_devinfo, 139 .get_props = pad_get_props, 140 .round_blocksize = pad_round_blocksize, 141 .get_locks = pad_get_locks, 142 }; 143 144 #define PAD_NFORMATS 1 145 static const struct audio_format pad_formats[PAD_NFORMATS] = { 146 { NULL, AUMODE_PLAY|AUMODE_RECORD, PADENC, PADPREC, PADPREC, 147 PADCHAN, AUFMT_STEREO, 1, { PADFREQ } }, 148 }; 149 150 extern void padattach(int); 151 152 static int pad_add_block(pad_softc_t *, uint8_t *, int); 153 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 154 155 dev_type_open(pad_open); 156 dev_type_close(cdev_pad_close); 157 dev_type_read(cdev_pad_read); 158 159 const struct cdevsw pad_cdevsw = { 160 .d_open = pad_open, 161 .d_close = cdev_pad_close, 162 .d_read = cdev_pad_read, 163 .d_write = nowrite, 164 .d_ioctl = noioctl, 165 .d_stop = nostop, 166 .d_tty = notty, 167 .d_poll = nopoll, 168 .d_mmap = nommap, 169 .d_kqfilter = nokqfilter, 170 .d_discard = nodiscard, 171 .d_flag = D_OTHER | D_MPSAFE, 172 }; 173 174 const struct fileops pad_fileops = { 175 .fo_name = "pad", 176 .fo_read = fops_pad_read, 177 .fo_write = pad_write, 178 .fo_ioctl = pad_ioctl, 179 .fo_fcntl = fnullop_fcntl, 180 .fo_stat = pad_stat, 181 .fo_poll = pad_poll, 182 .fo_close = fops_pad_close, 183 .fo_mmap = pad_mmap, 184 .fo_kqfilter = pad_kqfilter, 185 .fo_restart = fnullop_restart 186 }; 187 188 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 189 NULL, NULL, pad_childdet); 190 191 void 192 padattach(int n) 193 { 194 int error; 195 196 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 197 if (error) { 198 aprint_error("%s: couldn't register cfattach: %d\n", 199 pad_cd.cd_name, error); 200 config_cfdriver_detach(&pad_cd); 201 return; 202 } 203 204 return; 205 } 206 207 static int 208 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 209 { 210 int l; 211 212 if (sc->sc_open == 0) 213 return EIO; 214 215 KASSERT(mutex_owned(&sc->sc_lock)); 216 217 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 218 return ENOBUFS; 219 220 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 221 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 222 else { 223 l = PAD_BUFSIZE - sc->sc_wpos; 224 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 225 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 226 } 227 228 sc->sc_wpos += blksize; 229 if (sc->sc_wpos > PAD_BUFSIZE) 230 sc->sc_wpos -= PAD_BUFSIZE; 231 232 sc->sc_buflen += blksize; 233 234 return 0; 235 } 236 237 static int 238 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 239 { 240 int l; 241 242 KASSERT(mutex_owned(&sc->sc_lock)); 243 KASSERT(pb != NULL); 244 245 if (sc->sc_buflen < (uint)blksize) 246 return ERESTART; 247 248 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 249 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 250 pb->pb_len = blksize; 251 sc->sc_rpos += blksize; 252 } else { 253 l = PAD_BUFSIZE - sc->sc_rpos; 254 pb->pb_len = l; 255 sc->sc_rpos = 0; 256 } 257 sc->sc_buflen -= pb->pb_len; 258 259 return 0; 260 } 261 262 static int 263 pad_match(device_t parent, cfdata_t data, void *opaque) 264 { 265 266 return 1; 267 } 268 269 static void 270 pad_childdet(device_t self, device_t child) 271 { 272 pad_softc_t *sc = device_private(self); 273 274 sc->sc_audiodev = NULL; 275 } 276 277 static void 278 pad_attach(device_t parent, device_t self, void *opaque) 279 { 280 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 281 282 return; 283 } 284 285 static int 286 pad_detach(device_t self, int flags) 287 { 288 pad_softc_t *sc; 289 int cmaj, mn, rc; 290 291 sc = device_private(self); 292 config_deactivate(sc->sc_audiodev); 293 294 /* Start draining existing accessors of the device. */ 295 if ((rc = config_detach_children(self, flags)) != 0) 296 return rc; 297 298 mutex_enter(&sc->sc_lock); 299 sc->sc_dying = true; 300 cv_broadcast(&sc->sc_condvar); 301 mutex_exit(&sc->sc_lock); 302 303 KASSERT(sc->sc_open > 0); 304 sc->sc_open = 0; 305 306 cmaj = cdevsw_lookup_major(&pad_cdevsw); 307 mn = device_unit(sc->sc_dev); 308 vdevgone(cmaj, mn, mn, VCHR); 309 310 pmf_device_deregister(sc->sc_dev); 311 312 mutex_destroy(&sc->sc_lock); 313 mutex_destroy(&sc->sc_intr_lock); 314 cv_destroy(&sc->sc_condvar); 315 316 auconv_delete_encodings(sc->sc_encodings); 317 318 return 0; 319 } 320 321 int 322 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 323 { 324 pad_softc_t *sc; 325 struct file *fp; 326 device_t paddev; 327 cfdata_t cf; 328 int error, fd, i; 329 330 if (PADUNIT(dev) == PADCLONER) { 331 for (i = 0; i < MAXDEVS; i++) { 332 if (device_lookup(&pad_cd, i) == NULL) 333 break; 334 } 335 if (i == MAXDEVS) 336 return ENXIO; 337 } else { 338 if (PADUNIT(dev) >= MAXDEVS) 339 return ENXIO; 340 i = PADUNIT(dev); 341 } 342 343 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 344 cf->cf_name = pad_cd.cd_name; 345 cf->cf_atname = pad_cd.cd_name; 346 cf->cf_unit = i; 347 cf->cf_fstate = FSTATE_STAR; 348 349 if (device_lookup(&pad_cd, minor(dev)) == NULL) 350 paddev = config_attach_pseudo(cf); 351 else 352 paddev = device_lookup(&pad_cd, minor(dev)); 353 354 sc = device_private(paddev); 355 if (sc == NULL) 356 return ENXIO; 357 358 if (sc->sc_open == 1) 359 return EBUSY; 360 361 sc->sc_dev = paddev; 362 sc->sc_dying = false; 363 364 if (PADUNIT(dev) == PADCLONER) { 365 error = fd_allocfile(&fp, &fd); 366 if (error) { 367 config_detach(sc->sc_dev, 0); 368 return error; 369 } 370 } 371 372 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 373 &sc->sc_encodings) != 0) { 374 aprint_error_dev(sc->sc_dev, "couldn't create encodings\n"); 375 config_detach(sc->sc_dev, 0); 376 return EINVAL; 377 } 378 379 cv_init(&sc->sc_condvar, device_xname(sc->sc_dev)); 380 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 381 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 382 383 sc->sc_swvol = 255; 384 sc->sc_buflen = 0; 385 sc->sc_rpos = sc->sc_wpos = 0; 386 sc->sc_audiodev = audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 387 388 if (!pmf_device_register(sc->sc_dev, NULL, NULL)) 389 aprint_error_dev(sc->sc_dev, "couldn't establish power handler\n"); 390 391 if (PADUNIT(dev) == PADCLONER) { 392 error = fd_clone(fp, fd, flags, &pad_fileops, sc); 393 KASSERT(error == EMOVEFD); 394 } 395 sc->sc_open = 1; 396 397 return error; 398 } 399 400 static int 401 pad_close(struct pad_softc *sc) 402 { 403 if (sc == NULL) 404 return ENXIO; 405 406 return config_detach(sc->sc_dev, DETACH_FORCE); 407 } 408 409 static int 410 fops_pad_close(struct file *fp) 411 { 412 pad_softc_t *sc; 413 int error; 414 415 sc = fp->f_pad; 416 417 error = pad_close(sc); 418 419 if (error == 0) 420 fp->f_pad = NULL; 421 422 return error; 423 } 424 425 int 426 cdev_pad_close(dev_t dev, int flags, int ifmt, struct lwp *l) 427 { 428 pad_softc_t *sc; 429 sc = device_private(device_lookup(&pad_cd, PADUNIT(dev))); 430 431 return pad_close(sc); 432 } 433 434 static int 435 pad_poll(struct file *fp, int events) 436 { 437 return ENODEV; 438 } 439 440 static int 441 pad_kqfilter(struct file *fp, struct knote *kn) 442 { 443 struct pad_softc *sc; 444 dev_t dev; 445 446 sc = fp->f_pad; 447 if (sc == NULL) 448 return EIO; 449 450 dev = makedev(cdevsw_lookup_major(&pad_cdevsw), device_unit(sc->sc_dev)); 451 452 return seltrue_kqfilter(dev, kn); 453 } 454 455 static int 456 pad_ioctl(struct file *fp, u_long cmd, void *data) 457 { 458 return ENODEV; 459 } 460 461 static int 462 pad_stat(struct file *fp, struct stat *st) 463 { 464 struct pad_softc *sc; 465 466 sc = fp->f_pad; 467 if (sc == NULL) 468 return EIO; 469 470 memset(st, 0, sizeof(*st)); 471 472 st->st_dev = makedev(cdevsw_lookup_major(&pad_cdevsw), device_unit(sc->sc_dev)); 473 474 st->st_uid = kauth_cred_geteuid(fp->f_cred); 475 st->st_gid = kauth_cred_getegid(fp->f_cred); 476 st->st_mode = S_IFCHR; 477 478 return 0; 479 } 480 481 static int 482 pad_mmap(struct file *fp, off_t *offp, size_t len, int prot, int *flagsp, 483 int *advicep, struct uvm_object **uobjp, int *maxprotp) 484 { 485 return 1; 486 } 487 488 #define PAD_BYTES_PER_SEC (PADFREQ * PADPREC / NBBY * PADCHAN) 489 #define BYTESTOSLEEP (int64_t)(PAD_BLKSIZE) 490 #define TIMENEXTREAD (int64_t)(BYTESTOSLEEP * 1000000 / PAD_BYTES_PER_SEC) 491 492 int 493 cdev_pad_read(dev_t dev, struct uio *uio, int ioflag) 494 { 495 pad_softc_t *sc; 496 sc = device_private(device_lookup(&pad_cd, PADUNIT(dev))); 497 if (sc == NULL) 498 return ENXIO; 499 500 return pad_read(sc, NULL, uio, NULL, ioflag); 501 } 502 503 static int 504 fops_pad_read(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 505 int ioflag) 506 { 507 pad_softc_t *sc; 508 509 sc = fp->f_pad; 510 if (sc == NULL) 511 return ENXIO; 512 513 return pad_read(sc, offp, uio, cred, ioflag); 514 } 515 516 static int 517 pad_read(struct pad_softc *sc, off_t *offp, struct uio *uio, kauth_cred_t cred, 518 int ioflag) 519 { 520 struct timeval now; 521 uint64_t nowusec, lastusec; 522 pad_block_t pb; 523 void (*intr)(void *); 524 void *intrarg; 525 int err, wait_ticks; 526 527 err = 0; 528 529 while (uio->uio_resid > 0 && !err) { 530 mutex_enter(&sc->sc_lock); 531 if (sc->sc_dying == true) { 532 mutex_exit(&sc->sc_lock); 533 return EIO; 534 } 535 intr = sc->sc_intr; 536 intrarg = sc->sc_intrarg; 537 538 getmicrotime(&now); 539 nowusec = (now.tv_sec * 1000000) + now.tv_usec; 540 lastusec = (sc->sc_last.tv_sec * 1000000) + 541 sc->sc_last.tv_usec; 542 if (lastusec + TIMENEXTREAD > nowusec) { 543 if (sc->sc_bytes_count >= BYTESTOSLEEP) { 544 sc->sc_remainder += 545 ((lastusec + TIMENEXTREAD) - nowusec); 546 } 547 548 wait_ticks = (hz * sc->sc_remainder) / 1000000; 549 if (wait_ticks > 0) { 550 sc->sc_remainder -= wait_ticks * 1000000 / hz; 551 err = kpause("padwait", TRUE, wait_ticks, 552 &sc->sc_lock); 553 if (err != EWOULDBLOCK) { 554 mutex_exit(&sc->sc_lock); 555 continue; 556 } 557 } 558 } 559 560 if (sc->sc_bytes_count >= BYTESTOSLEEP) 561 sc->sc_bytes_count -= BYTESTOSLEEP; 562 563 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 564 if (!err) { 565 getmicrotime(&sc->sc_last); 566 sc->sc_bytes_count += pb.pb_len; 567 mutex_exit(&sc->sc_lock); 568 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 569 continue; 570 } 571 572 if (intr) { 573 mutex_enter(&sc->sc_intr_lock); 574 kpreempt_disable(); 575 (*intr)(intrarg); 576 kpreempt_enable(); 577 mutex_exit(&sc->sc_intr_lock); 578 intr = sc->sc_intr; 579 intrarg = sc->sc_intrarg; 580 err = 0; 581 mutex_exit(&sc->sc_lock); 582 continue; 583 } 584 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 585 if (err != 0) { 586 mutex_exit(&sc->sc_lock); 587 break; 588 } 589 590 mutex_exit(&sc->sc_lock); 591 } 592 593 return err; 594 } 595 596 static int 597 pad_write(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 598 int ioflag) 599 { 600 return EOPNOTSUPP; 601 } 602 603 static int 604 pad_audio_open(void *opaque, int flags) 605 { 606 pad_softc_t *sc; 607 sc = opaque; 608 609 if (sc->sc_open == 0) 610 return EIO; 611 612 getmicrotime(&sc->sc_last); 613 sc->sc_bytes_count = 0; 614 sc->sc_remainder = 0; 615 616 return 0; 617 } 618 619 static int 620 pad_query_encoding(void *opaque, struct audio_encoding *ae) 621 { 622 pad_softc_t *sc; 623 624 sc = (pad_softc_t *)opaque; 625 626 KASSERT(mutex_owned(&sc->sc_lock)); 627 628 return auconv_query_encoding(sc->sc_encodings, ae); 629 } 630 631 static int 632 pad_set_params(void *opaque, int setmode, int usemode, 633 audio_params_t *play, audio_params_t *rec, 634 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 635 { 636 pad_softc_t *sc __diagused; 637 638 sc = (pad_softc_t *)opaque; 639 640 KASSERT(mutex_owned(&sc->sc_lock)); 641 642 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 643 play, true, pfil) < 0) 644 return EINVAL; 645 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 646 rec, true, rfil) < 0) 647 return EINVAL; 648 649 if (pfil->req_size > 0) 650 play = &pfil->filters[0].param; 651 switch (play->encoding) { 652 case AUDIO_ENCODING_SLINEAR_LE: 653 if (play->precision == 16 && play->validbits == 16) 654 pfil->prepend(pfil, pad_swvol_filter_le, play); 655 break; 656 case AUDIO_ENCODING_SLINEAR_BE: 657 if (play->precision == 16 && play->validbits == 16) 658 pfil->prepend(pfil, pad_swvol_filter_be, play); 659 break; 660 default: 661 break; 662 } 663 664 return 0; 665 } 666 667 static int 668 pad_start_output(void *opaque, void *block, int blksize, 669 void (*intr)(void *), void *intrarg) 670 { 671 pad_softc_t *sc; 672 int err; 673 674 sc = (pad_softc_t *)opaque; 675 676 KASSERT(mutex_owned(&sc->sc_lock)); 677 if (!sc->sc_open) 678 return EIO; 679 680 sc->sc_intr = intr; 681 sc->sc_intrarg = intrarg; 682 sc->sc_blksize = blksize; 683 684 err = pad_add_block(sc, block, blksize); 685 686 cv_broadcast(&sc->sc_condvar); 687 688 return err; 689 } 690 691 static int 692 pad_start_input(void *opaque, void *block, int blksize, 693 void (*intr)(void *), void *intrarg) 694 { 695 pad_softc_t *sc __diagused; 696 697 sc = (pad_softc_t *)opaque; 698 699 KASSERT(mutex_owned(&sc->sc_lock)); 700 701 return EOPNOTSUPP; 702 } 703 704 static int 705 pad_halt_output(void *opaque) 706 { 707 pad_softc_t *sc; 708 709 sc = (pad_softc_t *)opaque; 710 711 KASSERT(mutex_owned(&sc->sc_lock)); 712 713 sc->sc_intr = NULL; 714 sc->sc_intrarg = NULL; 715 sc->sc_buflen = 0; 716 sc->sc_rpos = sc->sc_wpos = 0; 717 718 return 0; 719 } 720 721 static int 722 pad_halt_input(void *opaque) 723 { 724 pad_softc_t *sc __diagused; 725 726 sc = (pad_softc_t *)opaque; 727 728 KASSERT(mutex_owned(&sc->sc_lock)); 729 730 return 0; 731 } 732 733 static int 734 pad_getdev(void *opaque, struct audio_device *ret) 735 { 736 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 737 strlcpy(ret->version, osrelease, sizeof(ret->version)); 738 strlcpy(ret->config, "pad", sizeof(ret->config)); 739 740 return 0; 741 } 742 743 static int 744 pad_set_port(void *opaque, mixer_ctrl_t *mc) 745 { 746 pad_softc_t *sc; 747 748 sc = (pad_softc_t *)opaque; 749 750 KASSERT(mutex_owned(&sc->sc_lock)); 751 752 switch (mc->dev) { 753 case PAD_OUTPUT_MASTER_VOLUME: 754 case PAD_INPUT_DAC_VOLUME: 755 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 756 return 0; 757 } 758 759 return ENXIO; 760 } 761 762 static int 763 pad_get_port(void *opaque, mixer_ctrl_t *mc) 764 { 765 pad_softc_t *sc; 766 767 sc = (pad_softc_t *)opaque; 768 769 KASSERT(mutex_owned(&sc->sc_lock)); 770 771 switch (mc->dev) { 772 case PAD_OUTPUT_MASTER_VOLUME: 773 case PAD_INPUT_DAC_VOLUME: 774 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 775 return 0; 776 } 777 778 return ENXIO; 779 } 780 781 static int 782 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 783 { 784 pad_softc_t *sc __diagused; 785 786 sc = (pad_softc_t *)opaque; 787 788 KASSERT(mutex_owned(&sc->sc_lock)); 789 790 switch (di->index) { 791 case PAD_OUTPUT_CLASS: 792 di->mixer_class = PAD_OUTPUT_CLASS; 793 strcpy(di->label.name, AudioCoutputs); 794 di->type = AUDIO_MIXER_CLASS; 795 di->next = di->prev = AUDIO_MIXER_LAST; 796 return 0; 797 case PAD_INPUT_CLASS: 798 di->mixer_class = PAD_INPUT_CLASS; 799 strcpy(di->label.name, AudioCinputs); 800 di->type = AUDIO_MIXER_CLASS; 801 di->next = di->prev = AUDIO_MIXER_LAST; 802 return 0; 803 case PAD_OUTPUT_MASTER_VOLUME: 804 di->mixer_class = PAD_OUTPUT_CLASS; 805 strcpy(di->label.name, AudioNmaster); 806 di->type = AUDIO_MIXER_VALUE; 807 di->next = di->prev = AUDIO_MIXER_LAST; 808 di->un.v.num_channels = 1; 809 strcpy(di->un.v.units.name, AudioNvolume); 810 return 0; 811 case PAD_INPUT_DAC_VOLUME: 812 di->mixer_class = PAD_INPUT_CLASS; 813 strcpy(di->label.name, AudioNdac); 814 di->type = AUDIO_MIXER_VALUE; 815 di->next = di->prev = AUDIO_MIXER_LAST; 816 di->un.v.num_channels = 1; 817 strcpy(di->un.v.units.name, AudioNvolume); 818 return 0; 819 } 820 821 return ENXIO; 822 } 823 824 static int 825 pad_get_props(void *opaque) 826 { 827 pad_softc_t *sc __diagused; 828 829 sc = (pad_softc_t *)opaque; 830 831 KASSERT(mutex_owned(&sc->sc_lock)); 832 833 return 0; 834 } 835 836 static int 837 pad_round_blocksize(void *opaque, int blksize, int mode, 838 const audio_params_t *p) 839 { 840 pad_softc_t *sc __diagused; 841 842 sc = (pad_softc_t *)opaque; 843 KASSERT(mutex_owned(&sc->sc_lock)); 844 845 return PAD_BLKSIZE; 846 } 847 848 static void 849 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 850 { 851 pad_softc_t *sc; 852 853 sc = (pad_softc_t *)opaque; 854 855 *intr = &sc->sc_intr_lock; 856 *thread = &sc->sc_lock; 857 } 858 859 static stream_filter_t * 860 pad_swvol_filter_le(struct audio_softc *asc, 861 const audio_params_t *from, const audio_params_t *to) 862 { 863 auvolconv_filter_t *this; 864 device_t dev = audio_get_device(asc); 865 struct pad_softc *sc = device_private(dev); 866 867 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 868 this->base.base.fetch_to = auvolconv_slinear16_le_fetch_to; 869 this->base.dtor = pad_swvol_dtor; 870 this->base.set_fetcher = stream_filter_set_fetcher; 871 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 872 this->vol = &sc->sc_swvol; 873 874 return (stream_filter_t *)this; 875 } 876 877 static stream_filter_t * 878 pad_swvol_filter_be(struct audio_softc *asc, 879 const audio_params_t *from, const audio_params_t *to) 880 { 881 auvolconv_filter_t *this; 882 device_t dev = audio_get_device(asc); 883 struct pad_softc *sc = device_private(dev); 884 885 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 886 this->base.base.fetch_to = auvolconv_slinear16_be_fetch_to; 887 this->base.dtor = pad_swvol_dtor; 888 this->base.set_fetcher = stream_filter_set_fetcher; 889 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 890 this->vol = &sc->sc_swvol; 891 892 return (stream_filter_t *)this; 893 } 894 895 static void 896 pad_swvol_dtor(stream_filter_t *this) 897 { 898 if (this) 899 kmem_free(this, sizeof(auvolconv_filter_t)); 900 } 901 902 MODULE(MODULE_CLASS_DRIVER, pad, "audio"); 903 904 #ifdef _MODULE 905 906 /* XXX These should really be created by config(1)'s IOCONF mechanism */ 907 908 static const struct cfiattrdata audiobuscf_iattrdata = { 909 "audiobus", 0, { { NULL, NULL, 0 }, } 910 }; 911 static const struct cfiattrdata * const pad_attrs[] = { 912 &audiobuscf_iattrdata, NULL 913 }; 914 915 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 916 extern struct cfattach pad_ca; 917 static int padloc[] = { -1, -1 }; 918 919 static struct cfdata pad_cfdata[] = { 920 { 921 .cf_name = "pad", 922 .cf_atname = "pad", 923 .cf_unit = 0, 924 .cf_fstate = FSTATE_STAR, 925 .cf_loc = padloc, 926 .cf_flags = 0, 927 .cf_pspec = NULL, 928 }, 929 { NULL, NULL, 0, 0, NULL, 0, NULL } 930 }; 931 #endif 932 933 /* provide the vectors required for config_{init,fini}_component() */ 934 935 struct cfdriver * const pad_cfdriver[] = { &pad_cd, NULL }; 936 937 static struct cfattach * const pad_cfattachinit[] = { &pad_ca, NULL }; 938 939 static const struct cfattachinit pad_cfattach[] = { 940 { "pad", pad_cfattachinit }, 941 { NULL, NULL } 942 }; 943 944 #endif 945 946 static int 947 pad_modcmd(modcmd_t cmd, void *arg) 948 { 949 #ifdef _MODULE 950 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 951 #endif 952 int error = 0; 953 954 switch (cmd) { 955 case MODULE_CMD_INIT: 956 #ifdef _MODULE 957 error = config_init_component(pad_cfdriver, pad_cfattach, 958 pad_cfdata); 959 if (error) 960 break; 961 962 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 963 &pad_cdevsw, &cmajor); 964 if (error) { 965 config_fini_component(pad_cfdriver, pad_cfattach, 966 pad_cfdata); 967 break; 968 } 969 970 (void)config_attach_pseudo(pad_cfdata); 971 #endif 972 break; 973 974 case MODULE_CMD_FINI: 975 #ifdef _MODULE 976 error = devsw_detach(NULL, &pad_cdevsw); 977 if (error) 978 break; 979 980 error = config_fini_component(pad_cfdriver, pad_cfattach, 981 pad_cfdata); 982 if (error) { 983 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 984 &pad_cdevsw, &cmajor); 985 break; 986 } 987 #endif 988 break; 989 990 default: 991 error = ENOTTY; 992 } 993 994 return error; 995 } 996
Indexes created Thu Oct 02 10:09:58 GMT 2025