pad.c revision 1.68
1 /* $NetBSD: pad.c,v 1.68 2021/06/14 00:21:09 riastradh 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 1.68 2021/06/14 00:21:09 riastradh 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 struct pad_softc *sc = device_private(self); 222 223 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 224 225 sc->sc_dev = self; 226 sc->sc_dying = false; 227 228 cv_init(&sc->sc_condvar, device_xname(sc->sc_dev)); 229 mutex_init(&sc->sc_cond_lock, MUTEX_DEFAULT, IPL_NONE); 230 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 231 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 232 callout_init(&sc->sc_pcallout, 0/*XXX?*/); 233 234 sc->sc_swvol = 255; 235 sc->sc_buflen = 0; 236 sc->sc_rpos = sc->sc_wpos = 0; 237 sc->sc_audiodev = audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 238 239 if (!pmf_device_register(sc->sc_dev, NULL, NULL)) 240 aprint_error_dev(sc->sc_dev, 241 "couldn't establish power handler\n"); 242 } 243 244 static int 245 pad_detach(device_t self, int flags) 246 { 247 struct pad_softc *sc = device_private(self); 248 int cmaj, mn; 249 int error; 250 251 error = config_detach_children(self, flags); 252 if (error) 253 return error; 254 255 cmaj = cdevsw_lookup_major(&pad_cdevsw); 256 mn = device_unit(sc->sc_dev); 257 vdevgone(cmaj, mn, mn, VCHR); 258 259 pmf_device_deregister(sc->sc_dev); 260 261 mutex_destroy(&sc->sc_cond_lock); 262 mutex_destroy(&sc->sc_lock); 263 mutex_destroy(&sc->sc_intr_lock); 264 cv_destroy(&sc->sc_condvar); 265 266 return 0; 267 } 268 269 static void 270 pad_childdet(device_t self, device_t child) 271 { 272 struct pad_softc *sc = device_private(self); 273 274 if (child == sc->sc_audiodev) 275 sc->sc_audiodev = NULL; 276 } 277 278 static int 279 pad_add_block(struct pad_softc *sc, uint8_t *blk, int blksize) 280 { 281 int l; 282 283 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 284 return ENOBUFS; 285 286 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 287 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 288 else { 289 l = PAD_BUFSIZE - sc->sc_wpos; 290 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 291 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 292 } 293 294 sc->sc_wpos += blksize; 295 if (sc->sc_wpos >= PAD_BUFSIZE) 296 sc->sc_wpos -= PAD_BUFSIZE; 297 298 sc->sc_buflen += blksize; 299 300 return 0; 301 } 302 303 static int 304 pad_get_block(struct pad_softc *sc, pad_block_t *pb, int blksize) 305 { 306 int l; 307 308 KASSERT(pb != NULL); 309 310 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 311 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 312 pb->pb_len = blksize; 313 sc->sc_rpos += blksize; 314 } else { 315 l = PAD_BUFSIZE - sc->sc_rpos; 316 pb->pb_len = l; 317 sc->sc_rpos = 0; 318 } 319 sc->sc_buflen -= pb->pb_len; 320 321 return 0; 322 } 323 324 int 325 cdev_pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 326 { 327 struct pad_softc *sc; 328 struct file *fp; 329 device_t paddev; 330 cfdata_t cf; 331 int error, fd, i; 332 333 error = 0; 334 335 mutex_enter(&padconfig); 336 if (PADUNIT(dev) == PADCLONER) { 337 for (i = 0; i < MAXDEVS; i++) { 338 if (device_lookup(&pad_cd, i) == NULL) 339 break; 340 } 341 if (i == MAXDEVS) 342 goto bad; 343 } else { 344 if (PADUNIT(dev) >= MAXDEVS) 345 goto bad; 346 i = PADUNIT(dev); 347 } 348 349 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 350 cf->cf_name = pad_cd.cd_name; 351 cf->cf_atname = pad_cd.cd_name; 352 cf->cf_unit = i; 353 cf->cf_fstate = FSTATE_STAR; 354 355 bool existing = false; 356 paddev = device_lookup(&pad_cd, minor(dev)); 357 if (paddev == NULL) 358 paddev = config_attach_pseudo(cf); 359 else 360 existing = true; 361 if (paddev == NULL) 362 goto bad; 363 364 sc = device_private(paddev); 365 if (sc == NULL) 366 goto bad; 367 368 if (sc->sc_open == 1) { 369 mutex_exit(&padconfig); 370 return EBUSY; 371 } 372 373 if (PADUNIT(dev) == PADCLONER) { 374 error = fd_allocfile(&fp, &fd); 375 if (error) { 376 if (existing == false) 377 config_detach(paddev, 0); 378 mutex_exit(&padconfig); 379 return error; 380 } 381 error = fd_clone(fp, fd, flags, &pad_fileops, sc); 382 KASSERT(error == EMOVEFD); 383 } 384 sc->sc_open = 1; 385 mutex_exit(&padconfig); 386 387 return error; 388 bad: 389 mutex_exit(&padconfig); 390 return ENXIO; 391 } 392 393 static int 394 pad_close(struct pad_softc *sc) 395 { 396 int rc __diagused; 397 398 /* XXX Defend against concurrent drvctl detach. */ 399 rc = config_detach(sc->sc_dev, DETACH_FORCE); 400 KASSERT(rc == 0); 401 402 return 0; 403 } 404 405 static int 406 fops_pad_close(struct file *fp) 407 { 408 struct pad_softc *sc = fp->f_pad; 409 410 pad_close(sc); 411 fp->f_pad = NULL; 412 413 return 0; 414 } 415 416 int 417 cdev_pad_close(dev_t dev, int flags, int ifmt, struct lwp *l) 418 { 419 struct pad_softc *sc; 420 421 /* 422 * XXX Defend against concurrent drvctl detach. Simply testing 423 * sc == NULL here is not enough -- it could be detached after 424 * we look it up but before we've issued our own config_detach. 425 */ 426 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 427 if (sc == NULL) 428 return 0; 429 pad_close(sc); 430 431 return 0; 432 } 433 434 static int 435 fops_pad_poll(struct file *fp, int events) 436 { 437 438 return POLLERR; 439 } 440 441 static int 442 fops_pad_kqfilter(struct file *fp, struct knote *kn) 443 { 444 struct pad_softc *sc = fp->f_pad; 445 dev_t dev; 446 447 dev = makedev(cdevsw_lookup_major(&pad_cdevsw), 448 device_unit(sc->sc_dev)); 449 450 return seltrue_kqfilter(dev, kn); 451 } 452 453 static int 454 fops_pad_ioctl(struct file *fp, u_long cmd, void *data) 455 { 456 457 return ENODEV; 458 } 459 460 static int 461 fops_pad_stat(struct file *fp, struct stat *st) 462 { 463 struct pad_softc *sc = fp->f_pad; 464 465 memset(st, 0, sizeof(*st)); 466 467 st->st_dev = makedev(cdevsw_lookup_major(&pad_cdevsw), 468 device_unit(sc->sc_dev)); 469 470 st->st_uid = kauth_cred_geteuid(fp->f_cred); 471 st->st_gid = kauth_cred_getegid(fp->f_cred); 472 st->st_mode = S_IFCHR; 473 474 return 0; 475 } 476 477 static int 478 fops_pad_mmap(struct file *fp, off_t *offp, size_t len, int prot, int *flagsp, 479 int *advicep, struct uvm_object **uobjp, int *maxprotp) 480 { 481 482 return 1; 483 } 484 485 int 486 cdev_pad_read(dev_t dev, struct uio *uio, int ioflag) 487 { 488 struct pad_softc *sc; 489 490 sc = device_private(device_lookup(&pad_cd, PADUNIT(dev))); 491 if (sc == NULL) 492 return ENXIO; 493 494 return pad_read(sc, NULL, uio, NULL, ioflag); 495 } 496 497 static int 498 fops_pad_read(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 499 int ioflag) 500 { 501 struct pad_softc *sc = fp->f_pad; 502 503 return pad_read(sc, offp, uio, cred, ioflag); 504 } 505 506 static int 507 pad_read(struct pad_softc *sc, off_t *offp, struct uio *uio, kauth_cred_t cred, 508 int ioflag) 509 { 510 pad_block_t pb; 511 int len; 512 int err; 513 514 err = 0; 515 DPRINTF("%s: resid=%zu\n", __func__, uio->uio_resid); 516 while (uio->uio_resid > 0 && !err) { 517 mutex_enter(&sc->sc_cond_lock); 518 if (sc->sc_buflen == 0) { 519 DPRINTF("%s: wait\n", __func__); 520 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_cond_lock); 521 DPRINTF("%s: wake up %d\n", __func__, err); 522 mutex_exit(&sc->sc_cond_lock); 523 if (err) { 524 if (err == ERESTART) 525 err = EINTR; 526 break; 527 } 528 if (sc->sc_buflen == 0) 529 break; 530 continue; 531 } 532 533 len = uimin(uio->uio_resid, sc->sc_buflen); 534 err = pad_get_block(sc, &pb, len); 535 mutex_exit(&sc->sc_cond_lock); 536 if (err) 537 break; 538 DPRINTF("%s: move %d\n", __func__, pb.pb_len); 539 uiomove(pb.pb_ptr, pb.pb_len, uio); 540 } 541 542 return err; 543 } 544 545 static int 546 fops_pad_write(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 547 int ioflag) 548 { 549 550 return EOPNOTSUPP; 551 } 552 553 static int 554 pad_query_format(void *opaque, audio_format_query_t *afp) 555 { 556 557 return audio_query_format(pad_formats, PAD_NFORMATS, afp); 558 } 559 560 static int 561 pad_set_format(void *opaque, int setmode, 562 const audio_params_t *play, const audio_params_t *rec, 563 audio_filter_reg_t *pfil, audio_filter_reg_t *rfil) 564 { 565 struct pad_softc *sc; 566 567 sc = (struct pad_softc *)opaque; 568 569 KASSERT(mutex_owned(&sc->sc_lock)); 570 571 /* XXX playback only */ 572 pfil->codec = pad_swvol_codec; 573 pfil->context = sc; 574 575 return 0; 576 } 577 578 static int 579 pad_start_output(void *opaque, void *block, int blksize, 580 void (*intr)(void *), void *intrarg) 581 { 582 struct pad_softc *sc; 583 int err; 584 int ms; 585 586 sc = (struct pad_softc *)opaque; 587 588 KASSERT(mutex_owned(&sc->sc_intr_lock)); 589 590 sc->sc_intr = intr; 591 sc->sc_intrarg = intrarg; 592 sc->sc_blksize = blksize; 593 594 DPRINTF("%s: blksize=%d\n", __func__, blksize); 595 mutex_enter(&sc->sc_cond_lock); 596 err = pad_add_block(sc, block, blksize); 597 mutex_exit(&sc->sc_cond_lock); 598 cv_broadcast(&sc->sc_condvar); 599 600 ms = blksize * 1000 / PADCHAN / (PADPREC / NBBY) / PADFREQ; 601 DPRINTF("%s: callout ms=%d\n", __func__, ms); 602 callout_reset(&sc->sc_pcallout, mstohz(ms), pad_done_output, sc); 603 604 return err; 605 } 606 607 static int 608 pad_halt_output(void *opaque) 609 { 610 struct pad_softc *sc; 611 612 sc = (struct pad_softc *)opaque; 613 614 DPRINTF("%s\n", __func__); 615 KASSERT(mutex_owned(&sc->sc_intr_lock)); 616 617 cv_broadcast(&sc->sc_condvar); 618 callout_stop(&sc->sc_pcallout); 619 sc->sc_intr = NULL; 620 sc->sc_intrarg = NULL; 621 sc->sc_buflen = 0; 622 sc->sc_rpos = sc->sc_wpos = 0; 623 624 return 0; 625 } 626 627 static void 628 pad_done_output(void *arg) 629 { 630 struct pad_softc *sc; 631 632 DPRINTF("%s\n", __func__); 633 sc = (struct pad_softc *)arg; 634 callout_stop(&sc->sc_pcallout); 635 636 mutex_enter(&sc->sc_intr_lock); 637 (*sc->sc_intr)(sc->sc_intrarg); 638 mutex_exit(&sc->sc_intr_lock); 639 } 640 641 static int 642 pad_getdev(void *opaque, struct audio_device *ret) 643 { 644 645 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 646 strlcpy(ret->version, osrelease, sizeof(ret->version)); 647 strlcpy(ret->config, "pad", sizeof(ret->config)); 648 649 return 0; 650 } 651 652 static int 653 pad_set_port(void *opaque, mixer_ctrl_t *mc) 654 { 655 struct pad_softc *sc; 656 657 sc = (struct pad_softc *)opaque; 658 659 KASSERT(mutex_owned(&sc->sc_lock)); 660 661 switch (mc->dev) { 662 case PAD_OUTPUT_MASTER_VOLUME: 663 case PAD_INPUT_DAC_VOLUME: 664 if (mc->un.value.num_channels != 1) 665 return EINVAL; 666 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 667 return 0; 668 } 669 670 return ENXIO; 671 } 672 673 static int 674 pad_get_port(void *opaque, mixer_ctrl_t *mc) 675 { 676 struct pad_softc *sc; 677 678 sc = (struct pad_softc *)opaque; 679 680 KASSERT(mutex_owned(&sc->sc_lock)); 681 682 switch (mc->dev) { 683 case PAD_OUTPUT_MASTER_VOLUME: 684 case PAD_INPUT_DAC_VOLUME: 685 if (mc->un.value.num_channels != 1) 686 return EINVAL; 687 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 688 return 0; 689 } 690 691 return ENXIO; 692 } 693 694 static int 695 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 696 { 697 struct pad_softc *sc __diagused; 698 699 sc = (struct pad_softc *)opaque; 700 701 KASSERT(mutex_owned(&sc->sc_lock)); 702 703 switch (di->index) { 704 case PAD_OUTPUT_CLASS: 705 di->mixer_class = PAD_OUTPUT_CLASS; 706 strcpy(di->label.name, AudioCoutputs); 707 di->type = AUDIO_MIXER_CLASS; 708 di->next = di->prev = AUDIO_MIXER_LAST; 709 return 0; 710 case PAD_INPUT_CLASS: 711 di->mixer_class = PAD_INPUT_CLASS; 712 strcpy(di->label.name, AudioCinputs); 713 di->type = AUDIO_MIXER_CLASS; 714 di->next = di->prev = AUDIO_MIXER_LAST; 715 return 0; 716 case PAD_OUTPUT_MASTER_VOLUME: 717 di->mixer_class = PAD_OUTPUT_CLASS; 718 strcpy(di->label.name, AudioNmaster); 719 di->type = AUDIO_MIXER_VALUE; 720 di->next = di->prev = AUDIO_MIXER_LAST; 721 di->un.v.num_channels = 1; 722 strcpy(di->un.v.units.name, AudioNvolume); 723 return 0; 724 case PAD_INPUT_DAC_VOLUME: 725 di->mixer_class = PAD_INPUT_CLASS; 726 strcpy(di->label.name, AudioNdac); 727 di->type = AUDIO_MIXER_VALUE; 728 di->next = di->prev = AUDIO_MIXER_LAST; 729 di->un.v.num_channels = 1; 730 strcpy(di->un.v.units.name, AudioNvolume); 731 return 0; 732 } 733 734 return ENXIO; 735 } 736 737 static int 738 pad_get_props(void *opaque) 739 { 740 741 return AUDIO_PROP_PLAYBACK; 742 } 743 744 static void 745 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 746 { 747 struct pad_softc *sc; 748 749 sc = (struct pad_softc *)opaque; 750 751 *intr = &sc->sc_intr_lock; 752 *thread = &sc->sc_lock; 753 } 754 755 static void 756 pad_swvol_codec(audio_filter_arg_t *arg) 757 { 758 struct pad_softc *sc = arg->context; 759 const aint_t *src; 760 aint_t *dst; 761 u_int sample_count; 762 u_int i; 763 764 src = arg->src; 765 dst = arg->dst; 766 sample_count = arg->count * arg->srcfmt->channels; 767 for (i = 0; i < sample_count; i++) { 768 aint2_t v = (aint2_t)(*src++); 769 v = v * sc->sc_swvol / 255; 770 *dst++ = (aint_t)v; 771 } 772 } 773 774 MODULE(MODULE_CLASS_DRIVER, pad, "audio"); 775 776 #ifdef _MODULE 777 778 #include "ioconf.c" 779 780 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 781 782 /* 783 * We need our own version of cfattach since config(1)'s ioconf does not 784 * generate what we need 785 */ 786 787 static struct cfattach *pad_cfattachinit[] = { &pad_ca, NULL }; 788 789 static struct cfattachinit pad_cfattach[] = { 790 { "pad", pad_cfattachinit }, 791 { NULL, NULL } 792 }; 793 #endif 794 795 static int 796 pad_modcmd(modcmd_t cmd, void *arg) 797 { 798 int error = 0; 799 800 switch (cmd) { 801 case MODULE_CMD_INIT: 802 #ifdef _MODULE 803 pad_cfattach[1] = cfattach_ioconf_pad[0]; 804 error = config_init_component(cfdriver_ioconf_pad, 805 pad_cfattach, cfdata_ioconf_pad); 806 if (error) 807 break; 808 809 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 810 &pad_cdevsw, &cmajor); 811 if (error) { 812 config_fini_component(cfdriver_ioconf_pad, 813 pad_cfattach, cfdata_ioconf_pad); 814 break; 815 } 816 mutex_init(&padconfig, MUTEX_DEFAULT, IPL_NONE); 817 818 #endif 819 break; 820 821 case MODULE_CMD_FINI: 822 #ifdef _MODULE 823 error = devsw_detach(NULL, &pad_cdevsw); 824 if (error) 825 break; 826 827 error = config_fini_component(cfdriver_ioconf_pad, 828 pad_cfattach, cfdata_ioconf_pad); 829 if (error) { 830 devsw_attach(pad_cd.cd_name, NULL, &bmajor, 831 &pad_cdevsw, &cmajor); 832 break; 833 } 834 mutex_destroy(&padconfig); 835 #endif 836 break; 837 838 default: 839 error = ENOTTY; 840 } 841 842 return error; 843 } 844
Indexes created Thu Oct 02 10:09:58 GMT 2025