pad.c revision 1.59
1 /* $NetBSD: pad.c,v 1.59 2019/05/08 13:40:18 isaki 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 1.59 2019/05/08 13:40:18 isaki 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/module.h> 49 50 #include <dev/audio/audio_if.h> 51 #include <dev/audio/audiovar.h> 52 53 #include <dev/pad/padvar.h> 54 55 /* #define PAD_DEBUG */ 56 #ifdef PAD_DEBUG 57 #define DPRINTF(fmt...) printf(fmt) 58 #else 59 #define DPRINTF(fmt...) /**/ 60 #endif 61 62 #define MAXDEVS 128 63 #define PADCLONER 254 64 #define PADUNIT(x) minor(x) 65 66 #define PADFREQ 44100 67 #define PADCHAN 2 68 #define PADPREC 16 69 70 extern struct cfdriver pad_cd; 71 kmutex_t padconfig; 72 73 typedef struct pad_block { 74 uint8_t *pb_ptr; 75 int pb_len; 76 } pad_block_t; 77 78 enum { 79 PAD_OUTPUT_CLASS, 80 PAD_INPUT_CLASS, 81 PAD_OUTPUT_MASTER_VOLUME, 82 PAD_INPUT_DAC_VOLUME, 83 PAD_ENUM_LAST, 84 }; 85 86 static int pad_match(device_t, cfdata_t, void *); 87 static void pad_attach(device_t, device_t, void *); 88 static int pad_detach(device_t, int); 89 static void pad_childdet(device_t, device_t); 90 91 static int pad_query_format(void *, audio_format_query_t *); 92 static int pad_set_format(void *, int, 93 const audio_params_t *, const audio_params_t *, 94 audio_filter_reg_t *, audio_filter_reg_t *); 95 static int pad_start_output(void *, void *, int, 96 void (*)(void *), void *); 97 static int pad_start_input(void *, void *, int, 98 void (*)(void *), void *); 99 static int pad_halt_output(void *); 100 static int pad_halt_input(void *); 101 static int pad_getdev(void *, struct audio_device *); 102 static int pad_set_port(void *, mixer_ctrl_t *); 103 static int pad_get_port(void *, mixer_ctrl_t *); 104 static int pad_query_devinfo(void *, mixer_devinfo_t *); 105 static int pad_get_props(void *); 106 static void pad_get_locks(void *, kmutex_t **, kmutex_t **); 107 108 static void pad_done_output(void *); 109 static void pad_swvol_codec(audio_filter_arg_t *); 110 111 static int pad_close(struct pad_softc *); 112 static int pad_read(struct pad_softc *, off_t *, struct uio *, kauth_cred_t, int); 113 114 static int fops_pad_close(struct file *); 115 static int fops_pad_read(struct file *, off_t *, struct uio *, kauth_cred_t, int); 116 static int pad_write(struct file *, off_t *, struct uio *, kauth_cred_t, int); 117 static int pad_ioctl(struct file *, u_long, void *); 118 static int pad_kqfilter(struct file *, struct knote *); 119 static int pad_poll(struct file *, int); 120 static int pad_stat(struct file *, struct stat *); 121 static int pad_mmap(struct file *, off_t *, size_t, int, int *, int *, 122 struct uvm_object **, int *); 123 124 static const struct audio_hw_if pad_hw_if = { 125 .query_format = pad_query_format, 126 .set_format = pad_set_format, 127 .start_output = pad_start_output, 128 .start_input = pad_start_input, 129 .halt_output = pad_halt_output, 130 .halt_input = pad_halt_input, 131 .getdev = pad_getdev, 132 .set_port = pad_set_port, 133 .get_port = pad_get_port, 134 .query_devinfo = pad_query_devinfo, 135 .get_props = pad_get_props, 136 .get_locks = pad_get_locks, 137 }; 138 139 #define PAD_NFORMATS 1 140 static const struct audio_format pad_formats[PAD_NFORMATS] = { 141 { 142 .mode = AUMODE_PLAY, 143 .encoding = AUDIO_ENCODING_SLINEAR_NE, 144 .validbits = PADPREC, 145 .precision = PADPREC, 146 .channels = PADCHAN, 147 .channel_mask = AUFMT_STEREO, 148 .frequency_type = 1, 149 .frequency = { PADFREQ }, 150 }, 151 }; 152 153 extern void padattach(int); 154 155 static int pad_add_block(pad_softc_t *, uint8_t *, int); 156 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 157 158 dev_type_open(pad_open); 159 dev_type_close(cdev_pad_close); 160 dev_type_read(cdev_pad_read); 161 162 const struct cdevsw pad_cdevsw = { 163 .d_open = pad_open, 164 .d_close = cdev_pad_close, 165 .d_read = cdev_pad_read, 166 .d_write = nowrite, 167 .d_ioctl = noioctl, 168 .d_stop = nostop, 169 .d_tty = notty, 170 .d_poll = nopoll, 171 .d_mmap = nommap, 172 .d_kqfilter = nokqfilter, 173 .d_discard = nodiscard, 174 .d_flag = D_OTHER | D_MPSAFE, 175 }; 176 177 const struct fileops pad_fileops = { 178 .fo_name = "pad", 179 .fo_read = fops_pad_read, 180 .fo_write = pad_write, 181 .fo_ioctl = pad_ioctl, 182 .fo_fcntl = fnullop_fcntl, 183 .fo_stat = pad_stat, 184 .fo_poll = pad_poll, 185 .fo_close = fops_pad_close, 186 .fo_mmap = pad_mmap, 187 .fo_kqfilter = pad_kqfilter, 188 .fo_restart = fnullop_restart 189 }; 190 191 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), 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_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 213 { 214 int l; 215 216 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 217 return ENOBUFS; 218 219 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 220 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 221 else { 222 l = PAD_BUFSIZE - sc->sc_wpos; 223 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 224 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 225 } 226 227 sc->sc_wpos += blksize; 228 if (sc->sc_wpos >= PAD_BUFSIZE) 229 sc->sc_wpos -= PAD_BUFSIZE; 230 231 sc->sc_buflen += blksize; 232 233 return 0; 234 } 235 236 static int 237 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 238 { 239 int l; 240 241 KASSERT(pb != NULL); 242 243 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 244 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 245 pb->pb_len = blksize; 246 sc->sc_rpos += blksize; 247 } else { 248 l = PAD_BUFSIZE - sc->sc_rpos; 249 pb->pb_len = l; 250 sc->sc_rpos = 0; 251 } 252 sc->sc_buflen -= pb->pb_len; 253 254 return 0; 255 } 256 257 static int 258 pad_match(device_t parent, cfdata_t data, void *opaque) 259 { 260 261 return 1; 262 } 263 264 static void 265 pad_childdet(device_t self, device_t child) 266 { 267 pad_softc_t *sc = device_private(self); 268 269 sc->sc_audiodev = NULL; 270 } 271 272 static void 273 pad_attach(device_t parent, device_t self, void *opaque) 274 { 275 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 276 277 return; 278 } 279 280 static int 281 pad_detach(device_t self, int flags) 282 { 283 pad_softc_t *sc; 284 int cmaj, mn; 285 286 sc = device_private(self); 287 cmaj = cdevsw_lookup_major(&pad_cdevsw); 288 mn = device_unit(sc->sc_dev); 289 if (!sc->sc_dying) 290 vdevgone(cmaj, mn, mn, VCHR); 291 292 return 0; 293 } 294 295 int 296 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 297 { 298 pad_softc_t *sc; 299 struct file *fp; 300 device_t paddev; 301 cfdata_t cf; 302 int error, fd, i; 303 304 error = 0; 305 306 mutex_enter(&padconfig); 307 if (PADUNIT(dev) == PADCLONER) { 308 for (i = 0; i < MAXDEVS; i++) { 309 if (device_lookup(&pad_cd, i) == NULL) 310 break; 311 } 312 if (i == MAXDEVS) 313 goto bad; 314 } else { 315 if (PADUNIT(dev) >= MAXDEVS) 316 goto bad; 317 i = PADUNIT(dev); 318 } 319 320 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 321 cf->cf_name = pad_cd.cd_name; 322 cf->cf_atname = pad_cd.cd_name; 323 cf->cf_unit = i; 324 cf->cf_fstate = FSTATE_STAR; 325 326 bool existing = false; 327 paddev = device_lookup(&pad_cd, minor(dev)); 328 if (paddev == NULL) 329 paddev = config_attach_pseudo(cf); 330 else 331 existing = true; 332 if (paddev == NULL) 333 goto bad; 334 335 sc = device_private(paddev); 336 if (sc == NULL) 337 goto bad; 338 339 if (sc->sc_open == 1) { 340 mutex_exit(&padconfig); 341 return EBUSY; 342 } 343 344 sc->sc_dev = paddev; 345 sc->sc_dying = false; 346 347 if (PADUNIT(dev) == PADCLONER) { 348 error = fd_allocfile(&fp, &fd); 349 if (error) { 350 if (existing == false) 351 config_detach(sc->sc_dev, 0); 352 mutex_exit(&padconfig); 353 return error; 354 } 355 } 356 357 cv_init(&sc->sc_condvar, device_xname(sc->sc_dev)); 358 mutex_init(&sc->sc_cond_lock, MUTEX_DEFAULT, IPL_NONE); 359 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 360 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 361 callout_init(&sc->sc_pcallout, 0/*XXX?*/); 362 363 sc->sc_swvol = 255; 364 sc->sc_buflen = 0; 365 sc->sc_rpos = sc->sc_wpos = 0; 366 sc->sc_audiodev = audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 367 368 if (!pmf_device_register(sc->sc_dev, NULL, NULL)) 369 aprint_error_dev(sc->sc_dev, "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 pad_softc_t *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 pad_softc_t *sc; 443 sc = device_private(device_lookup(&pad_cd, PADUNIT(dev))); 444 445 return pad_close(sc); 446 } 447 448 static int 449 pad_poll(struct file *fp, int events) 450 { 451 return ENODEV; 452 } 453 454 static int 455 pad_kqfilter(struct file *fp, struct knote *kn) 456 { 457 struct pad_softc *sc; 458 dev_t dev; 459 460 sc = fp->f_pad; 461 if (sc == NULL) 462 return EIO; 463 464 dev = makedev(cdevsw_lookup_major(&pad_cdevsw), device_unit(sc->sc_dev)); 465 466 return seltrue_kqfilter(dev, kn); 467 } 468 469 static int 470 pad_ioctl(struct file *fp, u_long cmd, void *data) 471 { 472 return ENODEV; 473 } 474 475 static int 476 pad_stat(struct file *fp, struct stat *st) 477 { 478 struct pad_softc *sc; 479 480 sc = fp->f_pad; 481 if (sc == NULL) 482 return EIO; 483 484 memset(st, 0, sizeof(*st)); 485 486 st->st_dev = makedev(cdevsw_lookup_major(&pad_cdevsw), device_unit(sc->sc_dev)); 487 488 st->st_uid = kauth_cred_geteuid(fp->f_cred); 489 st->st_gid = kauth_cred_getegid(fp->f_cred); 490 st->st_mode = S_IFCHR; 491 492 return 0; 493 } 494 495 static int 496 pad_mmap(struct file *fp, off_t *offp, size_t len, int prot, int *flagsp, 497 int *advicep, struct uvm_object **uobjp, int *maxprotp) 498 { 499 return 1; 500 } 501 502 int 503 cdev_pad_read(dev_t dev, struct uio *uio, int ioflag) 504 { 505 pad_softc_t *sc; 506 sc = device_private(device_lookup(&pad_cd, PADUNIT(dev))); 507 if (sc == NULL) 508 return ENXIO; 509 510 return pad_read(sc, NULL, uio, NULL, ioflag); 511 } 512 513 static int 514 fops_pad_read(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 515 int ioflag) 516 { 517 pad_softc_t *sc; 518 519 sc = fp->f_pad; 520 if (sc == NULL) 521 return ENXIO; 522 523 return pad_read(sc, offp, uio, cred, ioflag); 524 } 525 526 static int 527 pad_read(struct pad_softc *sc, off_t *offp, struct uio *uio, kauth_cred_t cred, 528 int ioflag) 529 { 530 pad_block_t pb; 531 int len; 532 int err; 533 534 err = 0; 535 DPRINTF("%s: resid=%zu\n", __func__, uio->uio_resid); 536 while (uio->uio_resid > 0 && !err) { 537 mutex_enter(&sc->sc_cond_lock); 538 if (sc->sc_buflen == 0) { 539 DPRINTF("%s: wait\n", __func__); 540 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_cond_lock); 541 DPRINTF("%s: wake up %d\n", __func__, err); 542 mutex_exit(&sc->sc_cond_lock); 543 if (err) { 544 if (err == ERESTART) 545 err = EINTR; 546 break; 547 } 548 if (sc->sc_buflen == 0) 549 break; 550 continue; 551 } 552 553 len = uimin(uio->uio_resid, sc->sc_buflen); 554 err = pad_get_block(sc, &pb, len); 555 mutex_exit(&sc->sc_cond_lock); 556 if (err) 557 break; 558 DPRINTF("%s: move %d\n", __func__, pb.pb_len); 559 uiomove(pb.pb_ptr, pb.pb_len, uio); 560 } 561 562 return err; 563 } 564 565 static int 566 pad_write(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 567 int ioflag) 568 { 569 return EOPNOTSUPP; 570 } 571 572 static int 573 pad_query_format(void *opaque, audio_format_query_t *afp) 574 { 575 576 return audio_query_format(pad_formats, PAD_NFORMATS, afp); 577 } 578 579 static int 580 pad_set_format(void *opaque, int setmode, 581 const audio_params_t *play, const audio_params_t *rec, 582 audio_filter_reg_t *pfil, audio_filter_reg_t *rfil) 583 { 584 pad_softc_t *sc; 585 586 sc = (pad_softc_t *)opaque; 587 588 KASSERT(mutex_owned(&sc->sc_lock)); 589 590 /* XXX playback only */ 591 pfil->codec = pad_swvol_codec; 592 pfil->context = sc; 593 594 return 0; 595 } 596 597 static int 598 pad_start_output(void *opaque, void *block, int blksize, 599 void (*intr)(void *), void *intrarg) 600 { 601 pad_softc_t *sc; 602 int err; 603 int ms; 604 605 sc = (pad_softc_t *)opaque; 606 607 KASSERT(mutex_owned(&sc->sc_intr_lock)); 608 609 sc->sc_intr = intr; 610 sc->sc_intrarg = intrarg; 611 sc->sc_blksize = blksize; 612 613 DPRINTF("%s: blksize=%d\n", __func__, blksize); 614 mutex_enter(&sc->sc_cond_lock); 615 err = pad_add_block(sc, block, blksize); 616 mutex_exit(&sc->sc_cond_lock); 617 cv_broadcast(&sc->sc_condvar); 618 619 ms = blksize * 1000 / PADCHAN / (PADPREC / NBBY) / PADFREQ; 620 DPRINTF("%s: callout ms=%d\n", __func__, ms); 621 callout_reset(&sc->sc_pcallout, mstohz(ms), pad_done_output, sc); 622 623 return err; 624 } 625 626 static int 627 pad_start_input(void *opaque, void *block, int blksize, 628 void (*intr)(void *), void *intrarg) 629 { 630 pad_softc_t *sc __diagused; 631 632 sc = (pad_softc_t *)opaque; 633 634 KASSERT(mutex_owned(&sc->sc_intr_lock)); 635 636 return EOPNOTSUPP; 637 } 638 639 static int 640 pad_halt_output(void *opaque) 641 { 642 pad_softc_t *sc; 643 644 sc = (pad_softc_t *)opaque; 645 646 DPRINTF("%s\n", __func__); 647 KASSERT(mutex_owned(&sc->sc_intr_lock)); 648 649 cv_broadcast(&sc->sc_condvar); 650 callout_stop(&sc->sc_pcallout); 651 sc->sc_intr = NULL; 652 sc->sc_intrarg = NULL; 653 sc->sc_buflen = 0; 654 sc->sc_rpos = sc->sc_wpos = 0; 655 656 return 0; 657 } 658 659 static int 660 pad_halt_input(void *opaque) 661 { 662 pad_softc_t *sc __diagused; 663 664 sc = (pad_softc_t *)opaque; 665 666 KASSERT(mutex_owned(&sc->sc_intr_lock)); 667 668 return 0; 669 } 670 671 static void 672 pad_done_output(void *arg) 673 { 674 pad_softc_t *sc; 675 676 DPRINTF("%s\n", __func__); 677 sc = (pad_softc_t *)arg; 678 callout_stop(&sc->sc_pcallout); 679 680 mutex_enter(&sc->sc_intr_lock); 681 (*sc->sc_intr)(sc->sc_intrarg); 682 mutex_exit(&sc->sc_intr_lock); 683 } 684 685 static int 686 pad_getdev(void *opaque, struct audio_device *ret) 687 { 688 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 689 strlcpy(ret->version, osrelease, sizeof(ret->version)); 690 strlcpy(ret->config, "pad", sizeof(ret->config)); 691 692 return 0; 693 } 694 695 static int 696 pad_set_port(void *opaque, mixer_ctrl_t *mc) 697 { 698 pad_softc_t *sc; 699 700 sc = (pad_softc_t *)opaque; 701 702 KASSERT(mutex_owned(&sc->sc_lock)); 703 704 switch (mc->dev) { 705 case PAD_OUTPUT_MASTER_VOLUME: 706 case PAD_INPUT_DAC_VOLUME: 707 if (mc->un.value.num_channels != 1) 708 return EINVAL; 709 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 710 return 0; 711 } 712 713 return ENXIO; 714 } 715 716 static int 717 pad_get_port(void *opaque, mixer_ctrl_t *mc) 718 { 719 pad_softc_t *sc; 720 721 sc = (pad_softc_t *)opaque; 722 723 KASSERT(mutex_owned(&sc->sc_lock)); 724 725 switch (mc->dev) { 726 case PAD_OUTPUT_MASTER_VOLUME: 727 case PAD_INPUT_DAC_VOLUME: 728 if (mc->un.value.num_channels != 1) 729 return EINVAL; 730 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 731 return 0; 732 } 733 734 return ENXIO; 735 } 736 737 static int 738 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 739 { 740 pad_softc_t *sc __diagused; 741 742 sc = (pad_softc_t *)opaque; 743 744 KASSERT(mutex_owned(&sc->sc_lock)); 745 746 switch (di->index) { 747 case PAD_OUTPUT_CLASS: 748 di->mixer_class = PAD_OUTPUT_CLASS; 749 strcpy(di->label.name, AudioCoutputs); 750 di->type = AUDIO_MIXER_CLASS; 751 di->next = di->prev = AUDIO_MIXER_LAST; 752 return 0; 753 case PAD_INPUT_CLASS: 754 di->mixer_class = PAD_INPUT_CLASS; 755 strcpy(di->label.name, AudioCinputs); 756 di->type = AUDIO_MIXER_CLASS; 757 di->next = di->prev = AUDIO_MIXER_LAST; 758 return 0; 759 case PAD_OUTPUT_MASTER_VOLUME: 760 di->mixer_class = PAD_OUTPUT_CLASS; 761 strcpy(di->label.name, AudioNmaster); 762 di->type = AUDIO_MIXER_VALUE; 763 di->next = di->prev = AUDIO_MIXER_LAST; 764 di->un.v.num_channels = 1; 765 strcpy(di->un.v.units.name, AudioNvolume); 766 return 0; 767 case PAD_INPUT_DAC_VOLUME: 768 di->mixer_class = PAD_INPUT_CLASS; 769 strcpy(di->label.name, AudioNdac); 770 di->type = AUDIO_MIXER_VALUE; 771 di->next = di->prev = AUDIO_MIXER_LAST; 772 di->un.v.num_channels = 1; 773 strcpy(di->un.v.units.name, AudioNvolume); 774 return 0; 775 } 776 777 return ENXIO; 778 } 779 780 static int 781 pad_get_props(void *opaque) 782 { 783 pad_softc_t *sc __diagused; 784 785 sc = (pad_softc_t *)opaque; 786 787 KASSERT(mutex_owned(&sc->sc_lock)); 788 789 return AUDIO_PROP_PLAYBACK; 790 } 791 792 static void 793 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 794 { 795 pad_softc_t *sc; 796 797 sc = (pad_softc_t *)opaque; 798 799 *intr = &sc->sc_intr_lock; 800 *thread = &sc->sc_lock; 801 } 802 803 static void 804 pad_swvol_codec(audio_filter_arg_t *arg) 805 { 806 struct pad_softc *sc = arg->context; 807 const aint_t *src; 808 aint_t *dst; 809 u_int sample_count; 810 u_int i; 811 812 src = arg->src; 813 dst = arg->dst; 814 sample_count = arg->count * arg->srcfmt->channels; 815 for (i = 0; i < sample_count; i++) { 816 aint2_t v = (aint2_t)(*src++); 817 v = v * sc->sc_swvol / 255; 818 *dst++ = (aint_t)v; 819 } 820 } 821 822 MODULE(MODULE_CLASS_DRIVER, pad, "audio"); 823 824 #ifdef _MODULE 825 826 #include "ioconf.c" 827 828 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 829 830 /* 831 * We need our own version of cfattach since config(1)'s ioconf does not 832 * generate what we need 833 */ 834 835 static struct cfattach *pad_cfattachinit[] = { &pad_ca, NULL }; 836 837 static struct cfattachinit pad_cfattach[] = { 838 { "pad", pad_cfattachinit }, 839 { NULL, NULL } 840 }; 841 #endif 842 843 static int 844 pad_modcmd(modcmd_t cmd, void *arg) 845 { 846 int error = 0; 847 848 switch (cmd) { 849 case MODULE_CMD_INIT: 850 #ifdef _MODULE 851 pad_cfattach[1] = cfattach_ioconf_pad[0]; 852 error = config_init_component(cfdriver_ioconf_pad, 853 pad_cfattach, cfdata_ioconf_pad); 854 if (error) 855 break; 856 857 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 858 &pad_cdevsw, &cmajor); 859 if (error) { 860 config_fini_component(cfdriver_ioconf_pad, 861 pad_cfattach, cfdata_ioconf_pad); 862 break; 863 } 864 mutex_init(&padconfig, MUTEX_DEFAULT, IPL_NONE); 865 866 #endif 867 break; 868 869 case MODULE_CMD_FINI: 870 #ifdef _MODULE 871 error = devsw_detach(NULL, &pad_cdevsw); 872 if (error) 873 break; 874 875 error = config_fini_component(cfdriver_ioconf_pad, 876 pad_cfattach, cfdata_ioconf_pad); 877 if (error) { 878 devsw_attach(pad_cd.cd_name, NULL, &bmajor, 879 &pad_cdevsw, &cmajor); 880 break; 881 } 882 mutex_destroy(&padconfig); 883 #endif 884 break; 885 886 default: 887 error = ENOTTY; 888 } 889 890 return error; 891 } 892
Indexes created Thu Oct 02 14:10:14 GMT 2025