pad.c revision 1.49
1 /* $NetBSD: pad.c,v 1.49 2017/12/17 21:57:11 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 1.49 2017/12/17 21:57:11 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 paddev = device_lookup(&pad_cd, minor(dev)); 350 if (paddev == NULL) 351 paddev = config_attach_pseudo(cf); 352 if (paddev == NULL) 353 return ENXIO; 354 355 sc = device_private(paddev); 356 if (sc == NULL) 357 return ENXIO; 358 359 if (sc->sc_open == 1) 360 return EBUSY; 361 362 sc->sc_dev = paddev; 363 sc->sc_dying = false; 364 365 if (PADUNIT(dev) == PADCLONER) { 366 error = fd_allocfile(&fp, &fd); 367 if (error) { 368 config_detach(sc->sc_dev, 0); 369 return error; 370 } 371 } 372 373 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 374 &sc->sc_encodings) != 0) { 375 aprint_error_dev(sc->sc_dev, "couldn't create encodings\n"); 376 config_detach(sc->sc_dev, 0); 377 return EINVAL; 378 } 379 380 cv_init(&sc->sc_condvar, device_xname(sc->sc_dev)); 381 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 382 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 383 384 sc->sc_swvol = 255; 385 sc->sc_buflen = 0; 386 sc->sc_rpos = sc->sc_wpos = 0; 387 sc->sc_audiodev = audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 388 389 if (!pmf_device_register(sc->sc_dev, NULL, NULL)) 390 aprint_error_dev(sc->sc_dev, "couldn't establish power handler\n"); 391 392 if (PADUNIT(dev) == PADCLONER) { 393 error = fd_clone(fp, fd, flags, &pad_fileops, sc); 394 KASSERT(error == EMOVEFD); 395 } 396 sc->sc_open = 1; 397 398 return error; 399 } 400 401 static int 402 pad_close(struct pad_softc *sc) 403 { 404 if (sc == NULL) 405 return ENXIO; 406 407 return config_detach(sc->sc_dev, DETACH_FORCE); 408 } 409 410 static int 411 fops_pad_close(struct file *fp) 412 { 413 pad_softc_t *sc; 414 int error; 415 416 sc = fp->f_pad; 417 418 error = pad_close(sc); 419 420 if (error == 0) 421 fp->f_pad = NULL; 422 423 return error; 424 } 425 426 int 427 cdev_pad_close(dev_t dev, int flags, int ifmt, struct lwp *l) 428 { 429 pad_softc_t *sc; 430 sc = device_private(device_lookup(&pad_cd, PADUNIT(dev))); 431 432 return pad_close(sc); 433 } 434 435 static int 436 pad_poll(struct file *fp, int events) 437 { 438 return ENODEV; 439 } 440 441 static int 442 pad_kqfilter(struct file *fp, struct knote *kn) 443 { 444 struct pad_softc *sc; 445 dev_t dev; 446 447 sc = fp->f_pad; 448 if (sc == NULL) 449 return EIO; 450 451 dev = makedev(cdevsw_lookup_major(&pad_cdevsw), device_unit(sc->sc_dev)); 452 453 return seltrue_kqfilter(dev, kn); 454 } 455 456 static int 457 pad_ioctl(struct file *fp, u_long cmd, void *data) 458 { 459 return ENODEV; 460 } 461 462 static int 463 pad_stat(struct file *fp, struct stat *st) 464 { 465 struct pad_softc *sc; 466 467 sc = fp->f_pad; 468 if (sc == NULL) 469 return EIO; 470 471 memset(st, 0, sizeof(*st)); 472 473 st->st_dev = makedev(cdevsw_lookup_major(&pad_cdevsw), device_unit(sc->sc_dev)); 474 475 st->st_uid = kauth_cred_geteuid(fp->f_cred); 476 st->st_gid = kauth_cred_getegid(fp->f_cred); 477 st->st_mode = S_IFCHR; 478 479 return 0; 480 } 481 482 static int 483 pad_mmap(struct file *fp, off_t *offp, size_t len, int prot, int *flagsp, 484 int *advicep, struct uvm_object **uobjp, int *maxprotp) 485 { 486 return 1; 487 } 488 489 #define PAD_BYTES_PER_SEC (PADFREQ * PADPREC / NBBY * PADCHAN) 490 #define BYTESTOSLEEP (int64_t)(PAD_BLKSIZE) 491 #define TIMENEXTREAD (int64_t)(BYTESTOSLEEP * 1000000 / PAD_BYTES_PER_SEC) 492 493 int 494 cdev_pad_read(dev_t dev, struct uio *uio, int ioflag) 495 { 496 pad_softc_t *sc; 497 sc = device_private(device_lookup(&pad_cd, PADUNIT(dev))); 498 if (sc == NULL) 499 return ENXIO; 500 501 return pad_read(sc, NULL, uio, NULL, ioflag); 502 } 503 504 static int 505 fops_pad_read(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 506 int ioflag) 507 { 508 pad_softc_t *sc; 509 510 sc = fp->f_pad; 511 if (sc == NULL) 512 return ENXIO; 513 514 return pad_read(sc, offp, uio, cred, ioflag); 515 } 516 517 static int 518 pad_read(struct pad_softc *sc, off_t *offp, struct uio *uio, kauth_cred_t cred, 519 int ioflag) 520 { 521 struct timeval now; 522 uint64_t nowusec, lastusec; 523 pad_block_t pb; 524 void (*intr)(void *); 525 void *intrarg; 526 int err, wait_ticks; 527 528 err = 0; 529 530 while (uio->uio_resid > 0 && !err) { 531 mutex_enter(&sc->sc_lock); 532 if (sc->sc_dying == true) { 533 mutex_exit(&sc->sc_lock); 534 return EIO; 535 } 536 intr = sc->sc_intr; 537 intrarg = sc->sc_intrarg; 538 539 getmicrotime(&now); 540 nowusec = (now.tv_sec * 1000000) + now.tv_usec; 541 lastusec = (sc->sc_last.tv_sec * 1000000) + 542 sc->sc_last.tv_usec; 543 if (lastusec + TIMENEXTREAD > nowusec) { 544 if (sc->sc_bytes_count >= BYTESTOSLEEP) { 545 sc->sc_remainder += 546 ((lastusec + TIMENEXTREAD) - nowusec); 547 } 548 549 wait_ticks = (hz * sc->sc_remainder) / 1000000; 550 if (wait_ticks > 0) { 551 sc->sc_remainder -= wait_ticks * 1000000 / hz; 552 err = kpause("padwait", TRUE, wait_ticks, 553 &sc->sc_lock); 554 if (err != EWOULDBLOCK) { 555 mutex_exit(&sc->sc_lock); 556 continue; 557 } 558 } 559 } 560 561 if (sc->sc_bytes_count >= BYTESTOSLEEP) 562 sc->sc_bytes_count -= BYTESTOSLEEP; 563 564 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 565 if (!err) { 566 getmicrotime(&sc->sc_last); 567 sc->sc_bytes_count += pb.pb_len; 568 mutex_exit(&sc->sc_lock); 569 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 570 continue; 571 } 572 573 if (intr) { 574 mutex_enter(&sc->sc_intr_lock); 575 kpreempt_disable(); 576 (*intr)(intrarg); 577 kpreempt_enable(); 578 mutex_exit(&sc->sc_intr_lock); 579 intr = sc->sc_intr; 580 intrarg = sc->sc_intrarg; 581 err = 0; 582 mutex_exit(&sc->sc_lock); 583 continue; 584 } 585 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 586 if (err != 0) { 587 mutex_exit(&sc->sc_lock); 588 break; 589 } 590 591 mutex_exit(&sc->sc_lock); 592 } 593 594 return err; 595 } 596 597 static int 598 pad_write(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 599 int ioflag) 600 { 601 return EOPNOTSUPP; 602 } 603 604 static int 605 pad_audio_open(void *opaque, int flags) 606 { 607 pad_softc_t *sc; 608 sc = opaque; 609 610 if (sc->sc_open == 0) 611 return EIO; 612 613 getmicrotime(&sc->sc_last); 614 sc->sc_bytes_count = 0; 615 sc->sc_remainder = 0; 616 617 return 0; 618 } 619 620 static int 621 pad_query_encoding(void *opaque, struct audio_encoding *ae) 622 { 623 pad_softc_t *sc; 624 625 sc = (pad_softc_t *)opaque; 626 627 KASSERT(mutex_owned(&sc->sc_lock)); 628 629 return auconv_query_encoding(sc->sc_encodings, ae); 630 } 631 632 static int 633 pad_set_params(void *opaque, int setmode, int usemode, 634 audio_params_t *play, audio_params_t *rec, 635 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 636 { 637 pad_softc_t *sc __diagused; 638 639 sc = (pad_softc_t *)opaque; 640 641 KASSERT(mutex_owned(&sc->sc_lock)); 642 643 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 644 play, true, pfil) < 0) 645 return EINVAL; 646 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 647 rec, true, rfil) < 0) 648 return EINVAL; 649 650 if (pfil->req_size > 0) 651 play = &pfil->filters[0].param; 652 switch (play->encoding) { 653 case AUDIO_ENCODING_SLINEAR_LE: 654 if (play->precision == 16 && play->validbits == 16) 655 pfil->prepend(pfil, pad_swvol_filter_le, play); 656 break; 657 case AUDIO_ENCODING_SLINEAR_BE: 658 if (play->precision == 16 && play->validbits == 16) 659 pfil->prepend(pfil, pad_swvol_filter_be, play); 660 break; 661 default: 662 break; 663 } 664 665 return 0; 666 } 667 668 static int 669 pad_start_output(void *opaque, void *block, int blksize, 670 void (*intr)(void *), void *intrarg) 671 { 672 pad_softc_t *sc; 673 int err; 674 675 sc = (pad_softc_t *)opaque; 676 677 KASSERT(mutex_owned(&sc->sc_lock)); 678 if (!sc->sc_open) 679 return EIO; 680 681 sc->sc_intr = intr; 682 sc->sc_intrarg = intrarg; 683 sc->sc_blksize = blksize; 684 685 err = pad_add_block(sc, block, blksize); 686 687 cv_broadcast(&sc->sc_condvar); 688 689 return err; 690 } 691 692 static int 693 pad_start_input(void *opaque, void *block, int blksize, 694 void (*intr)(void *), void *intrarg) 695 { 696 pad_softc_t *sc __diagused; 697 698 sc = (pad_softc_t *)opaque; 699 700 KASSERT(mutex_owned(&sc->sc_lock)); 701 702 return EOPNOTSUPP; 703 } 704 705 static int 706 pad_halt_output(void *opaque) 707 { 708 pad_softc_t *sc; 709 710 sc = (pad_softc_t *)opaque; 711 712 KASSERT(mutex_owned(&sc->sc_lock)); 713 714 sc->sc_intr = NULL; 715 sc->sc_intrarg = NULL; 716 sc->sc_buflen = 0; 717 sc->sc_rpos = sc->sc_wpos = 0; 718 719 return 0; 720 } 721 722 static int 723 pad_halt_input(void *opaque) 724 { 725 pad_softc_t *sc __diagused; 726 727 sc = (pad_softc_t *)opaque; 728 729 KASSERT(mutex_owned(&sc->sc_lock)); 730 731 return 0; 732 } 733 734 static int 735 pad_getdev(void *opaque, struct audio_device *ret) 736 { 737 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 738 strlcpy(ret->version, osrelease, sizeof(ret->version)); 739 strlcpy(ret->config, "pad", sizeof(ret->config)); 740 741 return 0; 742 } 743 744 static int 745 pad_set_port(void *opaque, mixer_ctrl_t *mc) 746 { 747 pad_softc_t *sc; 748 749 sc = (pad_softc_t *)opaque; 750 751 KASSERT(mutex_owned(&sc->sc_lock)); 752 753 switch (mc->dev) { 754 case PAD_OUTPUT_MASTER_VOLUME: 755 case PAD_INPUT_DAC_VOLUME: 756 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 757 return 0; 758 } 759 760 return ENXIO; 761 } 762 763 static int 764 pad_get_port(void *opaque, mixer_ctrl_t *mc) 765 { 766 pad_softc_t *sc; 767 768 sc = (pad_softc_t *)opaque; 769 770 KASSERT(mutex_owned(&sc->sc_lock)); 771 772 switch (mc->dev) { 773 case PAD_OUTPUT_MASTER_VOLUME: 774 case PAD_INPUT_DAC_VOLUME: 775 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 776 return 0; 777 } 778 779 return ENXIO; 780 } 781 782 static int 783 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 784 { 785 pad_softc_t *sc __diagused; 786 787 sc = (pad_softc_t *)opaque; 788 789 KASSERT(mutex_owned(&sc->sc_lock)); 790 791 switch (di->index) { 792 case PAD_OUTPUT_CLASS: 793 di->mixer_class = PAD_OUTPUT_CLASS; 794 strcpy(di->label.name, AudioCoutputs); 795 di->type = AUDIO_MIXER_CLASS; 796 di->next = di->prev = AUDIO_MIXER_LAST; 797 return 0; 798 case PAD_INPUT_CLASS: 799 di->mixer_class = PAD_INPUT_CLASS; 800 strcpy(di->label.name, AudioCinputs); 801 di->type = AUDIO_MIXER_CLASS; 802 di->next = di->prev = AUDIO_MIXER_LAST; 803 return 0; 804 case PAD_OUTPUT_MASTER_VOLUME: 805 di->mixer_class = PAD_OUTPUT_CLASS; 806 strcpy(di->label.name, AudioNmaster); 807 di->type = AUDIO_MIXER_VALUE; 808 di->next = di->prev = AUDIO_MIXER_LAST; 809 di->un.v.num_channels = 1; 810 strcpy(di->un.v.units.name, AudioNvolume); 811 return 0; 812 case PAD_INPUT_DAC_VOLUME: 813 di->mixer_class = PAD_INPUT_CLASS; 814 strcpy(di->label.name, AudioNdac); 815 di->type = AUDIO_MIXER_VALUE; 816 di->next = di->prev = AUDIO_MIXER_LAST; 817 di->un.v.num_channels = 1; 818 strcpy(di->un.v.units.name, AudioNvolume); 819 return 0; 820 } 821 822 return ENXIO; 823 } 824 825 static int 826 pad_get_props(void *opaque) 827 { 828 pad_softc_t *sc __diagused; 829 830 sc = (pad_softc_t *)opaque; 831 832 KASSERT(mutex_owned(&sc->sc_lock)); 833 834 return 0; 835 } 836 837 static int 838 pad_round_blocksize(void *opaque, int blksize, int mode, 839 const audio_params_t *p) 840 { 841 pad_softc_t *sc __diagused; 842 843 sc = (pad_softc_t *)opaque; 844 KASSERT(mutex_owned(&sc->sc_lock)); 845 846 return PAD_BLKSIZE; 847 } 848 849 static void 850 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 851 { 852 pad_softc_t *sc; 853 854 sc = (pad_softc_t *)opaque; 855 856 *intr = &sc->sc_intr_lock; 857 *thread = &sc->sc_lock; 858 } 859 860 static stream_filter_t * 861 pad_swvol_filter_le(struct audio_softc *asc, 862 const audio_params_t *from, const audio_params_t *to) 863 { 864 auvolconv_filter_t *this; 865 device_t dev = audio_get_device(asc); 866 struct pad_softc *sc = device_private(dev); 867 868 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 869 this->base.base.fetch_to = auvolconv_slinear16_le_fetch_to; 870 this->base.dtor = pad_swvol_dtor; 871 this->base.set_fetcher = stream_filter_set_fetcher; 872 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 873 this->vol = &sc->sc_swvol; 874 875 return (stream_filter_t *)this; 876 } 877 878 static stream_filter_t * 879 pad_swvol_filter_be(struct audio_softc *asc, 880 const audio_params_t *from, const audio_params_t *to) 881 { 882 auvolconv_filter_t *this; 883 device_t dev = audio_get_device(asc); 884 struct pad_softc *sc = device_private(dev); 885 886 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 887 this->base.base.fetch_to = auvolconv_slinear16_be_fetch_to; 888 this->base.dtor = pad_swvol_dtor; 889 this->base.set_fetcher = stream_filter_set_fetcher; 890 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 891 this->vol = &sc->sc_swvol; 892 893 return (stream_filter_t *)this; 894 } 895 896 static void 897 pad_swvol_dtor(stream_filter_t *this) 898 { 899 if (this) 900 kmem_free(this, sizeof(auvolconv_filter_t)); 901 } 902 903 MODULE(MODULE_CLASS_DRIVER, pad, "audio"); 904 905 #ifdef _MODULE 906 907 #include "ioconf.c" 908 909 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 910 911 /* 912 * We need our own version of cfattach since config(1)'s ioconf does not 913 * generate what we need 914 */ 915 916 static struct cfattach *pad_cfattachinit[] = { &pad_ca, NULL }; 917 918 static struct cfattachinit pad_cfattach[] = { 919 { "pad", pad_cfattachinit }, 920 { NULL, NULL } 921 }; 922 #endif 923 924 static int 925 pad_modcmd(modcmd_t cmd, void *arg) 926 { 927 int error = 0; 928 929 switch (cmd) { 930 case MODULE_CMD_INIT: 931 #ifdef _MODULE 932 pad_cfattach[1] = cfattach_ioconf_pad[0]; 933 error = config_init_component(cfdriver_ioconf_pad, 934 pad_cfattach, cfdata_ioconf_pad); 935 if (error) 936 break; 937 938 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 939 &pad_cdevsw, &cmajor); 940 if (error) { 941 config_fini_component(cfdriver_ioconf_pad, 942 pad_cfattach, cfdata_ioconf_pad); 943 break; 944 } 945 946 #endif 947 break; 948 949 case MODULE_CMD_FINI: 950 #ifdef _MODULE 951 error = devsw_detach(NULL, &pad_cdevsw); 952 if (error) 953 break; 954 955 error = config_fini_component(cfdriver_ioconf_pad, 956 pad_cfattach, cfdata_ioconf_pad); 957 if (error) { 958 devsw_attach(pad_cd.cd_name, NULL, &bmajor, 959 &pad_cdevsw, &cmajor); 960 break; 961 } 962 #endif 963 break; 964 965 default: 966 error = ENOTTY; 967 } 968 969 return error; 970 } 971
Indexes created Thu Oct 02 14:10:14 GMT 2025