pad.c revision 1.63
1 /* $NetBSD: pad.c,v 1.63 2019/06/26 12:21:40 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 1.63 2019/06/26 12:21:40 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/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_start_input(void *, void *, int, 99 void (*)(void *), void *); 100 static int pad_halt_output(void *); 101 static int pad_halt_input(void *); 102 static int pad_getdev(void *, struct audio_device *); 103 static int pad_set_port(void *, mixer_ctrl_t *); 104 static int pad_get_port(void *, mixer_ctrl_t *); 105 static int pad_query_devinfo(void *, mixer_devinfo_t *); 106 static int pad_get_props(void *); 107 static void pad_get_locks(void *, kmutex_t **, kmutex_t **); 108 109 static void pad_done_output(void *); 110 static void pad_swvol_codec(audio_filter_arg_t *); 111 112 static int pad_close(struct pad_softc *); 113 static int pad_read(struct pad_softc *, off_t *, struct uio *, 114 kauth_cred_t, int); 115 116 static int fops_pad_close(struct file *); 117 static int fops_pad_read(struct file *, off_t *, struct uio *, 118 kauth_cred_t, int); 119 static int fops_pad_write(struct file *, off_t *, struct uio *, 120 kauth_cred_t, int); 121 static int fops_pad_ioctl(struct file *, u_long, void *); 122 static int fops_pad_kqfilter(struct file *, struct knote *); 123 static int fops_pad_poll(struct file *, int); 124 static int fops_pad_stat(struct file *, struct stat *); 125 static int fops_pad_mmap(struct file *, off_t *, size_t, int, int *, int *, 126 struct uvm_object **, int *); 127 128 static const struct audio_hw_if pad_hw_if = { 129 .query_format = pad_query_format, 130 .set_format = pad_set_format, 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 .get_locks = pad_get_locks, 141 }; 142 143 #define PAD_NFORMATS 1 144 static const struct audio_format pad_formats[PAD_NFORMATS] = { 145 { 146 .mode = AUMODE_PLAY, 147 .encoding = AUDIO_ENCODING_SLINEAR_LE, 148 .validbits = PADPREC, 149 .precision = PADPREC, 150 .channels = PADCHAN, 151 .channel_mask = AUFMT_STEREO, 152 .frequency_type = 1, 153 .frequency = { PADFREQ }, 154 }, 155 }; 156 157 extern void padattach(int); 158 159 static int pad_add_block(struct pad_softc *, uint8_t *, int); 160 static int pad_get_block(struct pad_softc *, pad_block_t *, int); 161 162 dev_type_open(cdev_pad_open); 163 dev_type_close(cdev_pad_close); 164 dev_type_read(cdev_pad_read); 165 166 const struct cdevsw pad_cdevsw = { 167 .d_open = cdev_pad_open, 168 .d_close = cdev_pad_close, 169 .d_read = cdev_pad_read, 170 .d_write = nowrite, 171 .d_ioctl = noioctl, 172 .d_stop = nostop, 173 .d_tty = notty, 174 .d_poll = nopoll, 175 .d_mmap = nommap, 176 .d_kqfilter = nokqfilter, 177 .d_discard = nodiscard, 178 .d_flag = D_OTHER | D_MPSAFE, 179 }; 180 181 const struct fileops pad_fileops = { 182 .fo_name = "pad", 183 .fo_read = fops_pad_read, 184 .fo_write = fops_pad_write, 185 .fo_ioctl = fops_pad_ioctl, 186 .fo_fcntl = fnullop_fcntl, 187 .fo_stat = fops_pad_stat, 188 .fo_poll = fops_pad_poll, 189 .fo_close = fops_pad_close, 190 .fo_mmap = fops_pad_mmap, 191 .fo_kqfilter = fops_pad_kqfilter, 192 .fo_restart = fnullop_restart 193 }; 194 195 CFATTACH_DECL2_NEW(pad, sizeof(struct pad_softc), 196 pad_match, pad_attach, pad_detach, 197 NULL, NULL, pad_childdet); 198 199 void 200 padattach(int n) 201 { 202 int error; 203 204 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 205 if (error) { 206 aprint_error("%s: couldn't register cfattach: %d\n", 207 pad_cd.cd_name, error); 208 config_cfdriver_detach(&pad_cd); 209 return; 210 } 211 mutex_init(&padconfig, MUTEX_DEFAULT, IPL_NONE); 212 213 return; 214 } 215 216 static int 217 pad_match(device_t parent, cfdata_t data, void *opaque) 218 { 219 220 return 1; 221 } 222 223 static void 224 pad_attach(device_t parent, device_t self, void *opaque) 225 { 226 227 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 228 } 229 230 static int 231 pad_detach(device_t self, int flags) 232 { 233 struct pad_softc *sc; 234 int cmaj, mn; 235 236 sc = device_private(self); 237 cmaj = cdevsw_lookup_major(&pad_cdevsw); 238 mn = device_unit(sc->sc_dev); 239 if (!sc->sc_dying) 240 vdevgone(cmaj, mn, mn, VCHR); 241 242 return 0; 243 } 244 245 static void 246 pad_childdet(device_t self, device_t child) 247 { 248 struct pad_softc *sc = device_private(self); 249 250 sc->sc_audiodev = NULL; 251 } 252 253 static int 254 pad_add_block(struct pad_softc *sc, uint8_t *blk, int blksize) 255 { 256 int l; 257 258 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 259 return ENOBUFS; 260 261 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 262 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 263 else { 264 l = PAD_BUFSIZE - sc->sc_wpos; 265 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 266 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 267 } 268 269 sc->sc_wpos += blksize; 270 if (sc->sc_wpos >= PAD_BUFSIZE) 271 sc->sc_wpos -= PAD_BUFSIZE; 272 273 sc->sc_buflen += blksize; 274 275 return 0; 276 } 277 278 static int 279 pad_get_block(struct pad_softc *sc, pad_block_t *pb, int blksize) 280 { 281 int l; 282 283 KASSERT(pb != NULL); 284 285 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 286 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 287 pb->pb_len = blksize; 288 sc->sc_rpos += blksize; 289 } else { 290 l = PAD_BUFSIZE - sc->sc_rpos; 291 pb->pb_len = l; 292 sc->sc_rpos = 0; 293 } 294 sc->sc_buflen -= pb->pb_len; 295 296 return 0; 297 } 298 299 int 300 cdev_pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 301 { 302 struct pad_softc *sc; 303 struct file *fp; 304 device_t paddev; 305 cfdata_t cf; 306 int error, fd, i; 307 308 error = 0; 309 310 mutex_enter(&padconfig); 311 if (PADUNIT(dev) == PADCLONER) { 312 for (i = 0; i < MAXDEVS; i++) { 313 if (device_lookup(&pad_cd, i) == NULL) 314 break; 315 } 316 if (i == MAXDEVS) 317 goto bad; 318 } else { 319 if (PADUNIT(dev) >= MAXDEVS) 320 goto bad; 321 i = PADUNIT(dev); 322 } 323 324 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 325 cf->cf_name = pad_cd.cd_name; 326 cf->cf_atname = pad_cd.cd_name; 327 cf->cf_unit = i; 328 cf->cf_fstate = FSTATE_STAR; 329 330 bool existing = false; 331 paddev = device_lookup(&pad_cd, minor(dev)); 332 if (paddev == NULL) 333 paddev = config_attach_pseudo(cf); 334 else 335 existing = true; 336 if (paddev == NULL) 337 goto bad; 338 339 sc = device_private(paddev); 340 if (sc == NULL) 341 goto bad; 342 343 if (sc->sc_open == 1) { 344 mutex_exit(&padconfig); 345 return EBUSY; 346 } 347 348 sc->sc_dev = paddev; 349 sc->sc_dying = false; 350 351 if (PADUNIT(dev) == PADCLONER) { 352 error = fd_allocfile(&fp, &fd); 353 if (error) { 354 if (existing == false) 355 config_detach(sc->sc_dev, 0); 356 mutex_exit(&padconfig); 357 return error; 358 } 359 } 360 361 cv_init(&sc->sc_condvar, device_xname(sc->sc_dev)); 362 mutex_init(&sc->sc_cond_lock, MUTEX_DEFAULT, IPL_NONE); 363 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 364 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 365 callout_init(&sc->sc_pcallout, 0/*XXX?*/); 366 367 sc->sc_swvol = 255; 368 sc->sc_buflen = 0; 369 sc->sc_rpos = sc->sc_wpos = 0; 370 sc->sc_audiodev = audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 371 372 if (!pmf_device_register(sc->sc_dev, NULL, NULL)) 373 aprint_error_dev(sc->sc_dev, 374 "couldn't establish power handler\n"); 375 376 if (PADUNIT(dev) == PADCLONER) { 377 error = fd_clone(fp, fd, flags, &pad_fileops, sc); 378 KASSERT(error == EMOVEFD); 379 } 380 sc->sc_open = 1; 381 mutex_exit(&padconfig); 382 383 return error; 384 bad: 385 mutex_exit(&padconfig); 386 return ENXIO; 387 } 388 389 static int 390 pad_close(struct pad_softc *sc) 391 { 392 int rc; 393 394 if (sc == NULL) 395 return ENXIO; 396 397 mutex_enter(&padconfig); 398 config_deactivate(sc->sc_audiodev); 399 400 /* Start draining existing accessors of the device. */ 401 if ((rc = config_detach_children(sc->sc_dev, 402 DETACH_SHUTDOWN|DETACH_FORCE)) != 0) { 403 mutex_exit(&padconfig); 404 return rc; 405 } 406 407 mutex_enter(&sc->sc_lock); 408 sc->sc_dying = true; 409 cv_broadcast(&sc->sc_condvar); 410 mutex_exit(&sc->sc_lock); 411 412 KASSERT(sc->sc_open > 0); 413 sc->sc_open = 0; 414 415 pmf_device_deregister(sc->sc_dev); 416 417 mutex_destroy(&sc->sc_cond_lock); 418 mutex_destroy(&sc->sc_lock); 419 mutex_destroy(&sc->sc_intr_lock); 420 cv_destroy(&sc->sc_condvar); 421 422 rc = config_detach(sc->sc_dev, 0); 423 mutex_exit(&padconfig); 424 425 return rc; 426 } 427 428 static int 429 fops_pad_close(struct file *fp) 430 { 431 struct pad_softc *sc; 432 int error; 433 434 sc = fp->f_pad; 435 436 error = pad_close(sc); 437 438 if (error == 0) 439 fp->f_pad = NULL; 440 441 return error; 442 } 443 444 int 445 cdev_pad_close(dev_t dev, int flags, int ifmt, struct lwp *l) 446 { 447 struct pad_softc *sc; 448 sc = device_private(device_lookup(&pad_cd, PADUNIT(dev))); 449 450 return pad_close(sc); 451 } 452 453 static int 454 fops_pad_poll(struct file *fp, int events) 455 { 456 457 return POLLERR; 458 } 459 460 static int 461 fops_pad_kqfilter(struct file *fp, struct knote *kn) 462 { 463 struct pad_softc *sc; 464 dev_t dev; 465 466 sc = fp->f_pad; 467 if (sc == NULL) 468 return EIO; 469 470 dev = makedev(cdevsw_lookup_major(&pad_cdevsw), 471 device_unit(sc->sc_dev)); 472 473 return seltrue_kqfilter(dev, kn); 474 } 475 476 static int 477 fops_pad_ioctl(struct file *fp, u_long cmd, void *data) 478 { 479 480 return ENODEV; 481 } 482 483 static int 484 fops_pad_stat(struct file *fp, struct stat *st) 485 { 486 struct pad_softc *sc; 487 488 sc = fp->f_pad; 489 if (sc == NULL) 490 return EIO; 491 492 memset(st, 0, sizeof(*st)); 493 494 st->st_dev = makedev(cdevsw_lookup_major(&pad_cdevsw), 495 device_unit(sc->sc_dev)); 496 497 st->st_uid = kauth_cred_geteuid(fp->f_cred); 498 st->st_gid = kauth_cred_getegid(fp->f_cred); 499 st->st_mode = S_IFCHR; 500 501 return 0; 502 } 503 504 static int 505 fops_pad_mmap(struct file *fp, off_t *offp, size_t len, int prot, int *flagsp, 506 int *advicep, struct uvm_object **uobjp, int *maxprotp) 507 { 508 509 return 1; 510 } 511 512 int 513 cdev_pad_read(dev_t dev, struct uio *uio, int ioflag) 514 { 515 struct pad_softc *sc; 516 517 sc = device_private(device_lookup(&pad_cd, PADUNIT(dev))); 518 if (sc == NULL) 519 return ENXIO; 520 521 return pad_read(sc, NULL, uio, NULL, ioflag); 522 } 523 524 static int 525 fops_pad_read(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 526 int ioflag) 527 { 528 struct pad_softc *sc; 529 530 sc = fp->f_pad; 531 if (sc == NULL) 532 return ENXIO; 533 534 return pad_read(sc, offp, uio, cred, ioflag); 535 } 536 537 static int 538 pad_read(struct pad_softc *sc, off_t *offp, struct uio *uio, kauth_cred_t cred, 539 int ioflag) 540 { 541 pad_block_t pb; 542 int len; 543 int err; 544 545 err = 0; 546 DPRINTF("%s: resid=%zu\n", __func__, uio->uio_resid); 547 while (uio->uio_resid > 0 && !err) { 548 mutex_enter(&sc->sc_cond_lock); 549 if (sc->sc_buflen == 0) { 550 DPRINTF("%s: wait\n", __func__); 551 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_cond_lock); 552 DPRINTF("%s: wake up %d\n", __func__, err); 553 mutex_exit(&sc->sc_cond_lock); 554 if (err) { 555 if (err == ERESTART) 556 err = EINTR; 557 break; 558 } 559 if (sc->sc_buflen == 0) 560 break; 561 continue; 562 } 563 564 len = uimin(uio->uio_resid, sc->sc_buflen); 565 err = pad_get_block(sc, &pb, len); 566 mutex_exit(&sc->sc_cond_lock); 567 if (err) 568 break; 569 DPRINTF("%s: move %d\n", __func__, pb.pb_len); 570 uiomove(pb.pb_ptr, pb.pb_len, uio); 571 } 572 573 return err; 574 } 575 576 static int 577 fops_pad_write(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 578 int ioflag) 579 { 580 581 return EOPNOTSUPP; 582 } 583 584 static int 585 pad_query_format(void *opaque, audio_format_query_t *afp) 586 { 587 588 return audio_query_format(pad_formats, PAD_NFORMATS, afp); 589 } 590 591 static int 592 pad_set_format(void *opaque, int setmode, 593 const audio_params_t *play, const audio_params_t *rec, 594 audio_filter_reg_t *pfil, audio_filter_reg_t *rfil) 595 { 596 struct pad_softc *sc; 597 598 sc = (struct pad_softc *)opaque; 599 600 KASSERT(mutex_owned(&sc->sc_lock)); 601 602 /* XXX playback only */ 603 pfil->codec = pad_swvol_codec; 604 pfil->context = sc; 605 606 return 0; 607 } 608 609 static int 610 pad_start_output(void *opaque, void *block, int blksize, 611 void (*intr)(void *), void *intrarg) 612 { 613 struct pad_softc *sc; 614 int err; 615 int ms; 616 617 sc = (struct pad_softc *)opaque; 618 619 KASSERT(mutex_owned(&sc->sc_intr_lock)); 620 621 sc->sc_intr = intr; 622 sc->sc_intrarg = intrarg; 623 sc->sc_blksize = blksize; 624 625 DPRINTF("%s: blksize=%d\n", __func__, blksize); 626 mutex_enter(&sc->sc_cond_lock); 627 err = pad_add_block(sc, block, blksize); 628 mutex_exit(&sc->sc_cond_lock); 629 cv_broadcast(&sc->sc_condvar); 630 if (err) 631 return err; 632 633 ms = blksize * 1000 / PADCHAN / (PADPREC / NBBY) / PADFREQ; 634 DPRINTF("%s: callout ms=%d\n", __func__, ms); 635 callout_reset(&sc->sc_pcallout, mstohz(ms), pad_done_output, sc); 636 637 return 0; 638 } 639 640 static int 641 pad_start_input(void *opaque, void *block, int blksize, 642 void (*intr)(void *), void *intrarg) 643 { 644 struct pad_softc *sc __diagused; 645 646 sc = (struct pad_softc *)opaque; 647 648 KASSERT(mutex_owned(&sc->sc_intr_lock)); 649 650 return EOPNOTSUPP; 651 } 652 653 static int 654 pad_halt_output(void *opaque) 655 { 656 struct pad_softc *sc; 657 658 sc = (struct pad_softc *)opaque; 659 660 DPRINTF("%s\n", __func__); 661 KASSERT(mutex_owned(&sc->sc_intr_lock)); 662 663 cv_broadcast(&sc->sc_condvar); 664 callout_stop(&sc->sc_pcallout); 665 sc->sc_intr = NULL; 666 sc->sc_intrarg = NULL; 667 sc->sc_buflen = 0; 668 sc->sc_rpos = sc->sc_wpos = 0; 669 670 return 0; 671 } 672 673 static int 674 pad_halt_input(void *opaque) 675 { 676 struct pad_softc *sc __diagused; 677 678 sc = (struct pad_softc *)opaque; 679 680 KASSERT(mutex_owned(&sc->sc_intr_lock)); 681 682 return 0; 683 } 684 685 static void 686 pad_done_output(void *arg) 687 { 688 struct pad_softc *sc; 689 690 DPRINTF("%s\n", __func__); 691 sc = (struct pad_softc *)arg; 692 callout_stop(&sc->sc_pcallout); 693 694 mutex_enter(&sc->sc_intr_lock); 695 (*sc->sc_intr)(sc->sc_intrarg); 696 mutex_exit(&sc->sc_intr_lock); 697 } 698 699 static int 700 pad_getdev(void *opaque, struct audio_device *ret) 701 { 702 703 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 704 strlcpy(ret->version, osrelease, sizeof(ret->version)); 705 strlcpy(ret->config, "pad", sizeof(ret->config)); 706 707 return 0; 708 } 709 710 static int 711 pad_set_port(void *opaque, mixer_ctrl_t *mc) 712 { 713 struct pad_softc *sc; 714 715 sc = (struct pad_softc *)opaque; 716 717 KASSERT(mutex_owned(&sc->sc_lock)); 718 719 switch (mc->dev) { 720 case PAD_OUTPUT_MASTER_VOLUME: 721 case PAD_INPUT_DAC_VOLUME: 722 if (mc->un.value.num_channels != 1) 723 return EINVAL; 724 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 725 return 0; 726 } 727 728 return ENXIO; 729 } 730 731 static int 732 pad_get_port(void *opaque, mixer_ctrl_t *mc) 733 { 734 struct pad_softc *sc; 735 736 sc = (struct pad_softc *)opaque; 737 738 KASSERT(mutex_owned(&sc->sc_lock)); 739 740 switch (mc->dev) { 741 case PAD_OUTPUT_MASTER_VOLUME: 742 case PAD_INPUT_DAC_VOLUME: 743 if (mc->un.value.num_channels != 1) 744 return EINVAL; 745 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 746 return 0; 747 } 748 749 return ENXIO; 750 } 751 752 static int 753 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 754 { 755 struct pad_softc *sc __diagused; 756 757 sc = (struct pad_softc *)opaque; 758 759 KASSERT(mutex_owned(&sc->sc_lock)); 760 761 switch (di->index) { 762 case PAD_OUTPUT_CLASS: 763 di->mixer_class = PAD_OUTPUT_CLASS; 764 strcpy(di->label.name, AudioCoutputs); 765 di->type = AUDIO_MIXER_CLASS; 766 di->next = di->prev = AUDIO_MIXER_LAST; 767 return 0; 768 case PAD_INPUT_CLASS: 769 di->mixer_class = PAD_INPUT_CLASS; 770 strcpy(di->label.name, AudioCinputs); 771 di->type = AUDIO_MIXER_CLASS; 772 di->next = di->prev = AUDIO_MIXER_LAST; 773 return 0; 774 case PAD_OUTPUT_MASTER_VOLUME: 775 di->mixer_class = PAD_OUTPUT_CLASS; 776 strcpy(di->label.name, AudioNmaster); 777 di->type = AUDIO_MIXER_VALUE; 778 di->next = di->prev = AUDIO_MIXER_LAST; 779 di->un.v.num_channels = 1; 780 strcpy(di->un.v.units.name, AudioNvolume); 781 return 0; 782 case PAD_INPUT_DAC_VOLUME: 783 di->mixer_class = PAD_INPUT_CLASS; 784 strcpy(di->label.name, AudioNdac); 785 di->type = AUDIO_MIXER_VALUE; 786 di->next = di->prev = AUDIO_MIXER_LAST; 787 di->un.v.num_channels = 1; 788 strcpy(di->un.v.units.name, AudioNvolume); 789 return 0; 790 } 791 792 return ENXIO; 793 } 794 795 static int 796 pad_get_props(void *opaque) 797 { 798 struct pad_softc *sc __diagused; 799 800 sc = (struct pad_softc *)opaque; 801 802 KASSERT(mutex_owned(&sc->sc_lock)); 803 804 return AUDIO_PROP_PLAYBACK; 805 } 806 807 static void 808 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 809 { 810 struct pad_softc *sc; 811 812 sc = (struct pad_softc *)opaque; 813 814 *intr = &sc->sc_intr_lock; 815 *thread = &sc->sc_lock; 816 } 817 818 static void 819 pad_swvol_codec(audio_filter_arg_t *arg) 820 { 821 struct pad_softc *sc = arg->context; 822 const aint_t *src; 823 aint_t *dst; 824 u_int sample_count; 825 u_int i; 826 827 src = arg->src; 828 dst = arg->dst; 829 sample_count = arg->count * arg->srcfmt->channels; 830 for (i = 0; i < sample_count; i++) { 831 aint2_t v = (aint2_t)(*src++); 832 v = v * sc->sc_swvol / 255; 833 *dst++ = (aint_t)v; 834 } 835 } 836 837 MODULE(MODULE_CLASS_DRIVER, pad, "audio"); 838 839 #ifdef _MODULE 840 841 #include "ioconf.c" 842 843 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 844 845 /* 846 * We need our own version of cfattach since config(1)'s ioconf does not 847 * generate what we need 848 */ 849 850 static struct cfattach *pad_cfattachinit[] = { &pad_ca, NULL }; 851 852 static struct cfattachinit pad_cfattach[] = { 853 { "pad", pad_cfattachinit }, 854 { NULL, NULL } 855 }; 856 #endif 857 858 static int 859 pad_modcmd(modcmd_t cmd, void *arg) 860 { 861 int error = 0; 862 863 switch (cmd) { 864 case MODULE_CMD_INIT: 865 #ifdef _MODULE 866 pad_cfattach[1] = cfattach_ioconf_pad[0]; 867 error = config_init_component(cfdriver_ioconf_pad, 868 pad_cfattach, cfdata_ioconf_pad); 869 if (error) 870 break; 871 872 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 873 &pad_cdevsw, &cmajor); 874 if (error) { 875 config_fini_component(cfdriver_ioconf_pad, 876 pad_cfattach, cfdata_ioconf_pad); 877 break; 878 } 879 mutex_init(&padconfig, MUTEX_DEFAULT, IPL_NONE); 880 881 #endif 882 break; 883 884 case MODULE_CMD_FINI: 885 #ifdef _MODULE 886 error = devsw_detach(NULL, &pad_cdevsw); 887 if (error) 888 break; 889 890 error = config_fini_component(cfdriver_ioconf_pad, 891 pad_cfattach, cfdata_ioconf_pad); 892 if (error) { 893 devsw_attach(pad_cd.cd_name, NULL, &bmajor, 894 &pad_cdevsw, &cmajor); 895 break; 896 } 897 mutex_destroy(&padconfig); 898 #endif 899 break; 900 901 default: 902 error = ENOTTY; 903 } 904 905 return error; 906 } 907
Indexes created Thu Oct 02 10:09:58 GMT 2025