pad.c revision 1.66
1 /* $NetBSD: pad.c,v 1.66 2021/06/08 09:09:28 nia 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 1.66 2021/06/08 09:09:28 nia 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/poll.h> 44 #include <sys/proc.h> 45 #include <sys/condvar.h> 46 #include <sys/select.h> 47 #include <sys/stat.h> 48 #include <sys/audioio.h> 49 #include <sys/module.h> 50 51 #include <dev/audio/audio_if.h> 52 #include <dev/audio/audiovar.h> 53 54 #include <dev/pad/padvar.h> 55 56 /* #define PAD_DEBUG */ 57 #ifdef PAD_DEBUG 58 #define DPRINTF(fmt...) printf(fmt) 59 #else 60 #define DPRINTF(fmt...) /**/ 61 #endif 62 63 #define MAXDEVS 128 64 #define PADCLONER 254 65 #define PADUNIT(x) minor(x) 66 67 #define PADFREQ 44100 68 #define PADCHAN 2 69 #define PADPREC 16 70 71 extern struct cfdriver pad_cd; 72 kmutex_t padconfig; 73 74 typedef struct pad_block { 75 uint8_t *pb_ptr; 76 int pb_len; 77 } pad_block_t; 78 79 enum { 80 PAD_OUTPUT_CLASS, 81 PAD_INPUT_CLASS, 82 PAD_OUTPUT_MASTER_VOLUME, 83 PAD_INPUT_DAC_VOLUME, 84 PAD_ENUM_LAST, 85 }; 86 87 static int pad_match(device_t, cfdata_t, void *); 88 static void pad_attach(device_t, device_t, void *); 89 static int pad_detach(device_t, int); 90 static void pad_childdet(device_t, device_t); 91 92 static int pad_query_format(void *, audio_format_query_t *); 93 static int pad_set_format(void *, int, 94 const audio_params_t *, const audio_params_t *, 95 audio_filter_reg_t *, audio_filter_reg_t *); 96 static int pad_start_output(void *, void *, int, 97 void (*)(void *), void *); 98 static int pad_halt_output(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 void pad_get_locks(void *, kmutex_t **, kmutex_t **); 105 106 static void pad_done_output(void *); 107 static void pad_swvol_codec(audio_filter_arg_t *); 108 109 static int pad_close(struct pad_softc *); 110 static int pad_read(struct pad_softc *, off_t *, struct uio *, 111 kauth_cred_t, int); 112 113 static int fops_pad_close(struct file *); 114 static int fops_pad_read(struct file *, off_t *, struct uio *, 115 kauth_cred_t, int); 116 static int fops_pad_write(struct file *, off_t *, struct uio *, 117 kauth_cred_t, int); 118 static int fops_pad_ioctl(struct file *, u_long, void *); 119 static int fops_pad_kqfilter(struct file *, struct knote *); 120 static int fops_pad_poll(struct file *, int); 121 static int fops_pad_stat(struct file *, struct stat *); 122 static int fops_pad_mmap(struct file *, off_t *, size_t, int, int *, int *, 123 struct uvm_object **, int *); 124 125 static const struct audio_hw_if pad_hw_if = { 126 .query_format = pad_query_format, 127 .set_format = pad_set_format, 128 .start_output = pad_start_output, 129 .halt_output = pad_halt_output, 130 .getdev = pad_getdev, 131 .set_port = pad_set_port, 132 .get_port = pad_get_port, 133 .query_devinfo = pad_query_devinfo, 134 .get_props = pad_get_props, 135 .get_locks = pad_get_locks, 136 }; 137 138 #define PAD_NFORMATS 1 139 static const struct audio_format pad_formats[PAD_NFORMATS] = { 140 { 141 .mode = AUMODE_PLAY, 142 .encoding = AUDIO_ENCODING_SLINEAR_LE, 143 .validbits = PADPREC, 144 .precision = PADPREC, 145 .channels = PADCHAN, 146 .channel_mask = AUFMT_STEREO, 147 .frequency_type = 1, 148 .frequency = { PADFREQ }, 149 }, 150 }; 151 152 extern void padattach(int); 153 154 static int pad_add_block(struct pad_softc *, uint8_t *, int); 155 static int pad_get_block(struct pad_softc *, pad_block_t *, int); 156 157 dev_type_open(cdev_pad_open); 158 dev_type_close(cdev_pad_close); 159 dev_type_read(cdev_pad_read); 160 161 const struct cdevsw pad_cdevsw = { 162 .d_open = cdev_pad_open, 163 .d_close = cdev_pad_close, 164 .d_read = cdev_pad_read, 165 .d_write = nowrite, 166 .d_ioctl = noioctl, 167 .d_stop = nostop, 168 .d_tty = notty, 169 .d_poll = nopoll, 170 .d_mmap = nommap, 171 .d_kqfilter = nokqfilter, 172 .d_discard = nodiscard, 173 .d_flag = D_OTHER | D_MPSAFE, 174 }; 175 176 const struct fileops pad_fileops = { 177 .fo_name = "pad", 178 .fo_read = fops_pad_read, 179 .fo_write = fops_pad_write, 180 .fo_ioctl = fops_pad_ioctl, 181 .fo_fcntl = fnullop_fcntl, 182 .fo_stat = fops_pad_stat, 183 .fo_poll = fops_pad_poll, 184 .fo_close = fops_pad_close, 185 .fo_mmap = fops_pad_mmap, 186 .fo_kqfilter = fops_pad_kqfilter, 187 .fo_restart = fnullop_restart 188 }; 189 190 CFATTACH_DECL2_NEW(pad, sizeof(struct pad_softc), 191 pad_match, pad_attach, pad_detach, 192 NULL, NULL, pad_childdet); 193 194 void 195 padattach(int n) 196 { 197 int error; 198 199 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 200 if (error) { 201 aprint_error("%s: couldn't register cfattach: %d\n", 202 pad_cd.cd_name, error); 203 config_cfdriver_detach(&pad_cd); 204 return; 205 } 206 mutex_init(&padconfig, MUTEX_DEFAULT, IPL_NONE); 207 208 return; 209 } 210 211 static int 212 pad_match(device_t parent, cfdata_t data, void *opaque) 213 { 214 215 return 1; 216 } 217 218 static void 219 pad_attach(device_t parent, device_t self, void *opaque) 220 { 221 222 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 223 } 224 225 static int 226 pad_detach(device_t self, int flags) 227 { 228 struct pad_softc *sc; 229 int cmaj, mn; 230 231 sc = device_private(self); 232 cmaj = cdevsw_lookup_major(&pad_cdevsw); 233 mn = device_unit(sc->sc_dev); 234 if (!sc->sc_dying) 235 vdevgone(cmaj, mn, mn, VCHR); 236 237 return 0; 238 } 239 240 static void 241 pad_childdet(device_t self, device_t child) 242 { 243 struct pad_softc *sc = device_private(self); 244 245 sc->sc_audiodev = NULL; 246 } 247 248 static int 249 pad_add_block(struct pad_softc *sc, uint8_t *blk, int blksize) 250 { 251 int l; 252 253 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 254 return ENOBUFS; 255 256 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 257 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 258 else { 259 l = PAD_BUFSIZE - sc->sc_wpos; 260 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 261 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 262 } 263 264 sc->sc_wpos += blksize; 265 if (sc->sc_wpos >= PAD_BUFSIZE) 266 sc->sc_wpos -= PAD_BUFSIZE; 267 268 sc->sc_buflen += blksize; 269 270 return 0; 271 } 272 273 static int 274 pad_get_block(struct pad_softc *sc, pad_block_t *pb, int blksize) 275 { 276 int l; 277 278 KASSERT(pb != NULL); 279 280 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 281 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 282 pb->pb_len = blksize; 283 sc->sc_rpos += blksize; 284 } else { 285 l = PAD_BUFSIZE - sc->sc_rpos; 286 pb->pb_len = l; 287 sc->sc_rpos = 0; 288 } 289 sc->sc_buflen -= pb->pb_len; 290 291 return 0; 292 } 293 294 int 295 cdev_pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 296 { 297 struct pad_softc *sc; 298 struct file *fp; 299 device_t paddev; 300 cfdata_t cf; 301 int error, fd, i; 302 303 error = 0; 304 305 mutex_enter(&padconfig); 306 if (PADUNIT(dev) == PADCLONER) { 307 for (i = 0; i < MAXDEVS; i++) { 308 if (device_lookup(&pad_cd, i) == NULL) 309 break; 310 } 311 if (i == MAXDEVS) 312 goto bad; 313 } else { 314 if (PADUNIT(dev) >= MAXDEVS) 315 goto bad; 316 i = PADUNIT(dev); 317 } 318 319 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 320 cf->cf_name = pad_cd.cd_name; 321 cf->cf_atname = pad_cd.cd_name; 322 cf->cf_unit = i; 323 cf->cf_fstate = FSTATE_STAR; 324 325 bool existing = false; 326 paddev = device_lookup(&pad_cd, minor(dev)); 327 if (paddev == NULL) 328 paddev = config_attach_pseudo(cf); 329 else 330 existing = true; 331 if (paddev == NULL) 332 goto bad; 333 334 sc = device_private(paddev); 335 if (sc == NULL) 336 goto bad; 337 338 if (sc->sc_open == 1) { 339 mutex_exit(&padconfig); 340 return EBUSY; 341 } 342 343 sc->sc_dev = paddev; 344 sc->sc_dying = false; 345 346 if (PADUNIT(dev) == PADCLONER) { 347 error = fd_allocfile(&fp, &fd); 348 if (error) { 349 if (existing == false) 350 config_detach(sc->sc_dev, 0); 351 mutex_exit(&padconfig); 352 return error; 353 } 354 } 355 356 cv_init(&sc->sc_condvar, device_xname(sc->sc_dev)); 357 mutex_init(&sc->sc_cond_lock, MUTEX_DEFAULT, IPL_NONE); 358 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 359 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 360 callout_init(&sc->sc_pcallout, 0/*XXX?*/); 361 362 sc->sc_swvol = 255; 363 sc->sc_buflen = 0; 364 sc->sc_rpos = sc->sc_wpos = 0; 365 sc->sc_audiodev = audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 366 367 if (!pmf_device_register(sc->sc_dev, NULL, NULL)) 368 aprint_error_dev(sc->sc_dev, 369 "couldn't establish power handler\n"); 370 371 if (PADUNIT(dev) == PADCLONER) { 372 error = fd_clone(fp, fd, flags, &pad_fileops, sc); 373 KASSERT(error == EMOVEFD); 374 } 375 sc->sc_open = 1; 376 mutex_exit(&padconfig); 377 378 return error; 379 bad: 380 mutex_exit(&padconfig); 381 return ENXIO; 382 } 383 384 static int 385 pad_close(struct pad_softc *sc) 386 { 387 int rc; 388 389 if (sc == NULL) 390 return ENXIO; 391 392 mutex_enter(&padconfig); 393 config_deactivate(sc->sc_audiodev); 394 395 /* Start draining existing accessors of the device. */ 396 if ((rc = config_detach_children(sc->sc_dev, 397 DETACH_SHUTDOWN|DETACH_FORCE)) != 0) { 398 mutex_exit(&padconfig); 399 return rc; 400 } 401 402 mutex_enter(&sc->sc_lock); 403 sc->sc_dying = true; 404 cv_broadcast(&sc->sc_condvar); 405 mutex_exit(&sc->sc_lock); 406 407 KASSERT(sc->sc_open > 0); 408 sc->sc_open = 0; 409 410 pmf_device_deregister(sc->sc_dev); 411 412 mutex_destroy(&sc->sc_cond_lock); 413 mutex_destroy(&sc->sc_lock); 414 mutex_destroy(&sc->sc_intr_lock); 415 cv_destroy(&sc->sc_condvar); 416 417 rc = config_detach(sc->sc_dev, 0); 418 mutex_exit(&padconfig); 419 420 return rc; 421 } 422 423 static int 424 fops_pad_close(struct file *fp) 425 { 426 struct pad_softc *sc; 427 int error; 428 429 sc = fp->f_pad; 430 431 error = pad_close(sc); 432 433 if (error == 0) 434 fp->f_pad = NULL; 435 436 return error; 437 } 438 439 int 440 cdev_pad_close(dev_t dev, int flags, int ifmt, struct lwp *l) 441 { 442 struct pad_softc *sc; 443 sc = device_private(device_lookup(&pad_cd, PADUNIT(dev))); 444 445 return pad_close(sc); 446 } 447 448 static int 449 fops_pad_poll(struct file *fp, int events) 450 { 451 452 return POLLERR; 453 } 454 455 static int 456 fops_pad_kqfilter(struct file *fp, struct knote *kn) 457 { 458 struct pad_softc *sc; 459 dev_t dev; 460 461 sc = fp->f_pad; 462 if (sc == NULL) 463 return EIO; 464 465 dev = makedev(cdevsw_lookup_major(&pad_cdevsw), 466 device_unit(sc->sc_dev)); 467 468 return seltrue_kqfilter(dev, kn); 469 } 470 471 static int 472 fops_pad_ioctl(struct file *fp, u_long cmd, void *data) 473 { 474 475 return ENODEV; 476 } 477 478 static int 479 fops_pad_stat(struct file *fp, struct stat *st) 480 { 481 struct pad_softc *sc; 482 483 sc = fp->f_pad; 484 if (sc == NULL) 485 return EIO; 486 487 memset(st, 0, sizeof(*st)); 488 489 st->st_dev = makedev(cdevsw_lookup_major(&pad_cdevsw), 490 device_unit(sc->sc_dev)); 491 492 st->st_uid = kauth_cred_geteuid(fp->f_cred); 493 st->st_gid = kauth_cred_getegid(fp->f_cred); 494 st->st_mode = S_IFCHR; 495 496 return 0; 497 } 498 499 static int 500 fops_pad_mmap(struct file *fp, off_t *offp, size_t len, int prot, int *flagsp, 501 int *advicep, struct uvm_object **uobjp, int *maxprotp) 502 { 503 504 return 1; 505 } 506 507 int 508 cdev_pad_read(dev_t dev, struct uio *uio, int ioflag) 509 { 510 struct pad_softc *sc; 511 512 sc = device_private(device_lookup(&pad_cd, PADUNIT(dev))); 513 if (sc == NULL) 514 return ENXIO; 515 516 return pad_read(sc, NULL, uio, NULL, ioflag); 517 } 518 519 static int 520 fops_pad_read(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 521 int ioflag) 522 { 523 struct pad_softc *sc; 524 525 sc = fp->f_pad; 526 if (sc == NULL) 527 return ENXIO; 528 529 return pad_read(sc, offp, uio, cred, ioflag); 530 } 531 532 static int 533 pad_read(struct pad_softc *sc, off_t *offp, struct uio *uio, kauth_cred_t cred, 534 int ioflag) 535 { 536 pad_block_t pb; 537 int len; 538 int err; 539 540 err = 0; 541 DPRINTF("%s: resid=%zu\n", __func__, uio->uio_resid); 542 while (uio->uio_resid > 0 && !err) { 543 mutex_enter(&sc->sc_cond_lock); 544 if (sc->sc_buflen == 0) { 545 DPRINTF("%s: wait\n", __func__); 546 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_cond_lock); 547 DPRINTF("%s: wake up %d\n", __func__, err); 548 mutex_exit(&sc->sc_cond_lock); 549 if (err) { 550 if (err == ERESTART) 551 err = EINTR; 552 break; 553 } 554 if (sc->sc_buflen == 0) 555 break; 556 continue; 557 } 558 559 len = uimin(uio->uio_resid, sc->sc_buflen); 560 err = pad_get_block(sc, &pb, len); 561 mutex_exit(&sc->sc_cond_lock); 562 if (err) 563 break; 564 DPRINTF("%s: move %d\n", __func__, pb.pb_len); 565 uiomove(pb.pb_ptr, pb.pb_len, uio); 566 } 567 568 return err; 569 } 570 571 static int 572 fops_pad_write(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 573 int ioflag) 574 { 575 576 return EOPNOTSUPP; 577 } 578 579 static int 580 pad_query_format(void *opaque, audio_format_query_t *afp) 581 { 582 583 return audio_query_format(pad_formats, PAD_NFORMATS, afp); 584 } 585 586 static int 587 pad_set_format(void *opaque, int setmode, 588 const audio_params_t *play, const audio_params_t *rec, 589 audio_filter_reg_t *pfil, audio_filter_reg_t *rfil) 590 { 591 struct pad_softc *sc; 592 593 sc = (struct pad_softc *)opaque; 594 595 KASSERT(mutex_owned(&sc->sc_lock)); 596 597 /* XXX playback only */ 598 pfil->codec = pad_swvol_codec; 599 pfil->context = sc; 600 601 return 0; 602 } 603 604 static int 605 pad_start_output(void *opaque, void *block, int blksize, 606 void (*intr)(void *), void *intrarg) 607 { 608 struct pad_softc *sc; 609 int err; 610 int ms; 611 612 sc = (struct pad_softc *)opaque; 613 614 KASSERT(mutex_owned(&sc->sc_intr_lock)); 615 616 sc->sc_intr = intr; 617 sc->sc_intrarg = intrarg; 618 sc->sc_blksize = blksize; 619 620 DPRINTF("%s: blksize=%d\n", __func__, blksize); 621 mutex_enter(&sc->sc_cond_lock); 622 err = pad_add_block(sc, block, blksize); 623 mutex_exit(&sc->sc_cond_lock); 624 cv_broadcast(&sc->sc_condvar); 625 626 ms = blksize * 1000 / PADCHAN / (PADPREC / NBBY) / PADFREQ; 627 DPRINTF("%s: callout ms=%d\n", __func__, ms); 628 callout_reset(&sc->sc_pcallout, mstohz(ms), pad_done_output, sc); 629 630 return err; 631 } 632 633 static int 634 pad_halt_output(void *opaque) 635 { 636 struct pad_softc *sc; 637 638 sc = (struct pad_softc *)opaque; 639 640 DPRINTF("%s\n", __func__); 641 KASSERT(mutex_owned(&sc->sc_intr_lock)); 642 643 cv_broadcast(&sc->sc_condvar); 644 callout_stop(&sc->sc_pcallout); 645 sc->sc_intr = NULL; 646 sc->sc_intrarg = NULL; 647 sc->sc_buflen = 0; 648 sc->sc_rpos = sc->sc_wpos = 0; 649 650 return 0; 651 } 652 653 static void 654 pad_done_output(void *arg) 655 { 656 struct pad_softc *sc; 657 658 DPRINTF("%s\n", __func__); 659 sc = (struct pad_softc *)arg; 660 callout_stop(&sc->sc_pcallout); 661 662 mutex_enter(&sc->sc_intr_lock); 663 (*sc->sc_intr)(sc->sc_intrarg); 664 mutex_exit(&sc->sc_intr_lock); 665 } 666 667 static int 668 pad_getdev(void *opaque, struct audio_device *ret) 669 { 670 671 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 672 strlcpy(ret->version, osrelease, sizeof(ret->version)); 673 strlcpy(ret->config, "pad", sizeof(ret->config)); 674 675 return 0; 676 } 677 678 static int 679 pad_set_port(void *opaque, mixer_ctrl_t *mc) 680 { 681 struct pad_softc *sc; 682 683 sc = (struct pad_softc *)opaque; 684 685 KASSERT(mutex_owned(&sc->sc_lock)); 686 687 switch (mc->dev) { 688 case PAD_OUTPUT_MASTER_VOLUME: 689 case PAD_INPUT_DAC_VOLUME: 690 if (mc->un.value.num_channels != 1) 691 return EINVAL; 692 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 693 return 0; 694 } 695 696 return ENXIO; 697 } 698 699 static int 700 pad_get_port(void *opaque, mixer_ctrl_t *mc) 701 { 702 struct pad_softc *sc; 703 704 sc = (struct pad_softc *)opaque; 705 706 KASSERT(mutex_owned(&sc->sc_lock)); 707 708 switch (mc->dev) { 709 case PAD_OUTPUT_MASTER_VOLUME: 710 case PAD_INPUT_DAC_VOLUME: 711 if (mc->un.value.num_channels != 1) 712 return EINVAL; 713 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 714 return 0; 715 } 716 717 return ENXIO; 718 } 719 720 static int 721 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 722 { 723 struct pad_softc *sc __diagused; 724 725 sc = (struct pad_softc *)opaque; 726 727 KASSERT(mutex_owned(&sc->sc_lock)); 728 729 switch (di->index) { 730 case PAD_OUTPUT_CLASS: 731 di->mixer_class = PAD_OUTPUT_CLASS; 732 strcpy(di->label.name, AudioCoutputs); 733 di->type = AUDIO_MIXER_CLASS; 734 di->next = di->prev = AUDIO_MIXER_LAST; 735 return 0; 736 case PAD_INPUT_CLASS: 737 di->mixer_class = PAD_INPUT_CLASS; 738 strcpy(di->label.name, AudioCinputs); 739 di->type = AUDIO_MIXER_CLASS; 740 di->next = di->prev = AUDIO_MIXER_LAST; 741 return 0; 742 case PAD_OUTPUT_MASTER_VOLUME: 743 di->mixer_class = PAD_OUTPUT_CLASS; 744 strcpy(di->label.name, AudioNmaster); 745 di->type = AUDIO_MIXER_VALUE; 746 di->next = di->prev = AUDIO_MIXER_LAST; 747 di->un.v.num_channels = 1; 748 strcpy(di->un.v.units.name, AudioNvolume); 749 return 0; 750 case PAD_INPUT_DAC_VOLUME: 751 di->mixer_class = PAD_INPUT_CLASS; 752 strcpy(di->label.name, AudioNdac); 753 di->type = AUDIO_MIXER_VALUE; 754 di->next = di->prev = AUDIO_MIXER_LAST; 755 di->un.v.num_channels = 1; 756 strcpy(di->un.v.units.name, AudioNvolume); 757 return 0; 758 } 759 760 return ENXIO; 761 } 762 763 static int 764 pad_get_props(void *opaque) 765 { 766 767 return AUDIO_PROP_PLAYBACK; 768 } 769 770 static void 771 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 772 { 773 struct pad_softc *sc; 774 775 sc = (struct pad_softc *)opaque; 776 777 *intr = &sc->sc_intr_lock; 778 *thread = &sc->sc_lock; 779 } 780 781 static void 782 pad_swvol_codec(audio_filter_arg_t *arg) 783 { 784 struct pad_softc *sc = arg->context; 785 const aint_t *src; 786 aint_t *dst; 787 u_int sample_count; 788 u_int i; 789 790 src = arg->src; 791 dst = arg->dst; 792 sample_count = arg->count * arg->srcfmt->channels; 793 for (i = 0; i < sample_count; i++) { 794 aint2_t v = (aint2_t)(*src++); 795 v = v * sc->sc_swvol / 255; 796 *dst++ = (aint_t)v; 797 } 798 } 799 800 MODULE(MODULE_CLASS_DRIVER, pad, "audio"); 801 802 #ifdef _MODULE 803 804 #include "ioconf.c" 805 806 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 807 808 /* 809 * We need our own version of cfattach since config(1)'s ioconf does not 810 * generate what we need 811 */ 812 813 static struct cfattach *pad_cfattachinit[] = { &pad_ca, NULL }; 814 815 static struct cfattachinit pad_cfattach[] = { 816 { "pad", pad_cfattachinit }, 817 { NULL, NULL } 818 }; 819 #endif 820 821 static int 822 pad_modcmd(modcmd_t cmd, void *arg) 823 { 824 int error = 0; 825 826 switch (cmd) { 827 case MODULE_CMD_INIT: 828 #ifdef _MODULE 829 pad_cfattach[1] = cfattach_ioconf_pad[0]; 830 error = config_init_component(cfdriver_ioconf_pad, 831 pad_cfattach, cfdata_ioconf_pad); 832 if (error) 833 break; 834 835 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 836 &pad_cdevsw, &cmajor); 837 if (error) { 838 config_fini_component(cfdriver_ioconf_pad, 839 pad_cfattach, cfdata_ioconf_pad); 840 break; 841 } 842 mutex_init(&padconfig, MUTEX_DEFAULT, IPL_NONE); 843 844 #endif 845 break; 846 847 case MODULE_CMD_FINI: 848 #ifdef _MODULE 849 error = devsw_detach(NULL, &pad_cdevsw); 850 if (error) 851 break; 852 853 error = config_fini_component(cfdriver_ioconf_pad, 854 pad_cfattach, cfdata_ioconf_pad); 855 if (error) { 856 devsw_attach(pad_cd.cd_name, NULL, &bmajor, 857 &pad_cdevsw, &cmajor); 858 break; 859 } 860 mutex_destroy(&padconfig); 861 #endif 862 break; 863 864 default: 865 error = ENOTTY; 866 } 867 868 return error; 869 } 870
Indexes created Thu Oct 02 10:09:58 GMT 2025