pad.c revision 1.21
1 /* $NetBSD: pad.c,v 1.21 2014/07/25 08:10:38 dholland 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 1.21 2014/07/25 08:10:38 dholland 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/kmem.h> 37 #include <sys/kernel.h> 38 #include <sys/device.h> 39 #include <sys/proc.h> 40 #include <sys/condvar.h> 41 #include <sys/select.h> 42 #include <sys/audioio.h> 43 #include <sys/vnode.h> 44 #include <sys/module.h> 45 #include <sys/atomic.h> 46 47 #include <dev/audio_if.h> 48 #include <dev/audiovar.h> 49 #include <dev/auconv.h> 50 51 #include <dev/pad/padvar.h> 52 #include <dev/pad/padvol.h> 53 54 #define PADUNIT(x) minor(x) 55 56 extern struct cfdriver pad_cd; 57 58 typedef struct pad_block { 59 uint8_t *pb_ptr; 60 int pb_len; 61 } pad_block_t; 62 63 enum { 64 PAD_OUTPUT_CLASS, 65 PAD_INPUT_CLASS, 66 PAD_OUTPUT_MASTER_VOLUME, 67 PAD_INPUT_DAC_VOLUME, 68 PAD_ENUM_LAST, 69 }; 70 71 static int pad_match(device_t, cfdata_t, void *); 72 static void pad_attach(device_t, device_t, void *); 73 static int pad_detach(device_t, int); 74 static void pad_childdet(device_t, device_t); 75 76 static int pad_query_encoding(void *, struct audio_encoding *); 77 static int pad_set_params(void *, int, int, 78 audio_params_t *, audio_params_t *, 79 stream_filter_list_t *, stream_filter_list_t *); 80 static int pad_start_output(void *, void *, int, 81 void (*)(void *), void *); 82 static int pad_start_input(void *, void *, int, 83 void (*)(void *), void *); 84 static int pad_halt_output(void *); 85 static int pad_halt_input(void *); 86 static int pad_getdev(void *, struct audio_device *); 87 static int pad_set_port(void *, mixer_ctrl_t *); 88 static int pad_get_port(void *, mixer_ctrl_t *); 89 static int pad_query_devinfo(void *, mixer_devinfo_t *); 90 static int pad_get_props(void *); 91 static int pad_round_blocksize(void *, int, int, const audio_params_t *); 92 static void pad_get_locks(void *, kmutex_t **, kmutex_t **); 93 94 static const struct audio_hw_if pad_hw_if = { 95 .query_encoding = pad_query_encoding, 96 .set_params = pad_set_params, 97 .start_output = pad_start_output, 98 .start_input = pad_start_input, 99 .halt_output = pad_halt_output, 100 .halt_input = pad_halt_input, 101 .getdev = pad_getdev, 102 .set_port = pad_set_port, 103 .get_port = pad_get_port, 104 .query_devinfo = pad_query_devinfo, 105 .get_props = pad_get_props, 106 .round_blocksize = pad_round_blocksize, 107 .get_locks = pad_get_locks, 108 }; 109 110 #define PAD_NFORMATS 1 111 static const struct audio_format pad_formats[PAD_NFORMATS] = { 112 { NULL, AUMODE_PLAY|AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16, 113 2, AUFMT_STEREO, 1, { 44100 } }, 114 }; 115 116 extern void padattach(int); 117 118 static int pad_add_block(pad_softc_t *, uint8_t *, int); 119 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 120 121 dev_type_open(pad_open); 122 dev_type_close(pad_close); 123 dev_type_read(pad_read); 124 125 const struct cdevsw pad_cdevsw = { 126 .d_open = pad_open, 127 .d_close = pad_close, 128 .d_read = pad_read, 129 .d_write = nowrite, 130 .d_ioctl = noioctl, 131 .d_stop = nostop, 132 .d_tty = notty, 133 .d_poll = nopoll, 134 .d_mmap = nommap, 135 .d_kqfilter = nokqfilter, 136 .d_discard = nodiscard, 137 .d_flag = D_OTHER | D_MPSAFE, 138 }; 139 140 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 141 NULL, NULL, pad_childdet); 142 143 void 144 padattach(int n) 145 { 146 int i, err; 147 cfdata_t cf; 148 149 aprint_debug("pad: requested %d units\n", n); 150 151 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 152 if (err) { 153 aprint_error("%s: couldn't register cfattach: %d\n", 154 pad_cd.cd_name, err); 155 config_cfdriver_detach(&pad_cd); 156 return; 157 } 158 159 for (i = 0; i < n; i++) { 160 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 161 if (cf == NULL) { 162 aprint_error("%s: couldn't allocate cfdata\n", 163 pad_cd.cd_name); 164 continue; 165 } 166 cf->cf_name = pad_cd.cd_name; 167 cf->cf_atname = pad_cd.cd_name; 168 cf->cf_unit = i; 169 cf->cf_fstate = FSTATE_STAR; 170 171 (void)config_attach_pseudo(cf); 172 } 173 174 return; 175 } 176 177 static int 178 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 179 { 180 int l; 181 182 if (sc->sc_open == 0) 183 return EIO; 184 185 KASSERT(mutex_owned(&sc->sc_lock)); 186 187 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 188 return ENOBUFS; 189 190 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 191 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 192 else { 193 l = PAD_BUFSIZE - sc->sc_wpos; 194 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 195 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 196 } 197 198 sc->sc_wpos += blksize; 199 if (sc->sc_wpos > PAD_BUFSIZE) 200 sc->sc_wpos -= PAD_BUFSIZE; 201 202 sc->sc_buflen += blksize; 203 204 return 0; 205 } 206 207 static int 208 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 209 { 210 int l; 211 212 KASSERT(mutex_owned(&sc->sc_lock)); 213 KASSERT(pb != NULL); 214 215 if (sc->sc_buflen < blksize) 216 return ERESTART; 217 218 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 219 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 220 pb->pb_len = blksize; 221 sc->sc_rpos += blksize; 222 } else { 223 l = PAD_BUFSIZE - sc->sc_rpos; 224 pb->pb_len = l; 225 sc->sc_rpos = 0; 226 } 227 sc->sc_buflen -= pb->pb_len; 228 229 return 0; 230 } 231 232 static int 233 pad_match(device_t parent, cfdata_t data, void *opaque) 234 { 235 236 return 1; 237 } 238 239 static void 240 pad_childdet(device_t self, device_t child) 241 { 242 pad_softc_t *sc = device_private(self); 243 244 sc->sc_audiodev = NULL; 245 } 246 247 static void 248 pad_attach(device_t parent, device_t self, void *opaque) 249 { 250 pad_softc_t *sc = device_private(self); 251 252 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 253 254 sc->sc_dev = self; 255 sc->sc_open = 0; 256 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 257 &sc->sc_encodings) != 0) { 258 aprint_error_dev(self, "couldn't create encodings\n"); 259 return; 260 } 261 262 cv_init(&sc->sc_condvar, device_xname(self)); 263 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 264 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 265 266 sc->sc_swvol = 255; 267 sc->sc_buflen = 0; 268 sc->sc_rpos = sc->sc_wpos = 0; 269 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 270 271 if (!pmf_device_register(self, NULL, NULL)) 272 aprint_error_dev(self, "couldn't establish power handler\n"); 273 274 return; 275 } 276 277 static int 278 pad_detach(device_t self, int flags) 279 { 280 pad_softc_t *sc = device_private(self); 281 int cmaj, mn, rc; 282 283 cmaj = cdevsw_lookup_major(&pad_cdevsw); 284 mn = device_unit(self); 285 vdevgone(cmaj, mn, mn, VCHR); 286 287 if ((rc = config_detach_children(self, flags)) != 0) 288 return rc; 289 290 pmf_device_deregister(self); 291 292 mutex_destroy(&sc->sc_lock); 293 mutex_destroy(&sc->sc_intr_lock); 294 cv_destroy(&sc->sc_condvar); 295 296 auconv_delete_encodings(sc->sc_encodings); 297 298 return 0; 299 } 300 301 int 302 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 303 { 304 pad_softc_t *sc; 305 306 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 307 if (sc == NULL) 308 return ENXIO; 309 310 if (atomic_swap_uint(&sc->sc_open, 1) != 0) { 311 return EBUSY; 312 } 313 314 return 0; 315 } 316 317 int 318 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 319 { 320 pad_softc_t *sc; 321 322 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 323 if (sc == NULL) 324 return ENXIO; 325 326 KASSERT(sc->sc_open > 0); 327 sc->sc_open = 0; 328 329 return 0; 330 } 331 332 int 333 pad_read(dev_t dev, struct uio *uio, int flags) 334 { 335 pad_softc_t *sc; 336 pad_block_t pb; 337 void (*intr)(void *); 338 void *intrarg; 339 int err; 340 341 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 342 if (sc == NULL) 343 return ENXIO; 344 345 err = 0; 346 347 mutex_enter(&sc->sc_lock); 348 intr = sc->sc_intr; 349 intrarg = sc->sc_intrarg; 350 351 while (uio->uio_resid > 0 && !err) { 352 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 353 if (!err) { 354 mutex_exit(&sc->sc_lock); 355 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 356 mutex_enter(&sc->sc_lock); 357 continue; 358 } 359 360 if (intr) { 361 mutex_enter(&sc->sc_intr_lock); 362 (*intr)(intrarg); 363 mutex_exit(&sc->sc_intr_lock); 364 intr = sc->sc_intr; 365 intrarg = sc->sc_intrarg; 366 err = 0; 367 continue; 368 } 369 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 370 if (err != 0) { 371 mutex_exit(&sc->sc_lock); 372 return err; 373 } 374 intr = sc->sc_intr; 375 intrarg = sc->sc_intrarg; 376 } 377 378 if (intr) { 379 mutex_enter(&sc->sc_intr_lock); 380 (*intr)(intrarg); 381 mutex_exit(&sc->sc_intr_lock); 382 } 383 mutex_exit(&sc->sc_lock); 384 385 return err; 386 } 387 388 static int 389 pad_query_encoding(void *opaque, struct audio_encoding *ae) 390 { 391 pad_softc_t *sc; 392 393 sc = (pad_softc_t *)opaque; 394 395 KASSERT(mutex_owned(&sc->sc_lock)); 396 397 return auconv_query_encoding(sc->sc_encodings, ae); 398 } 399 400 static int 401 pad_set_params(void *opaque, int setmode, int usemode, 402 audio_params_t *play, audio_params_t *rec, 403 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 404 { 405 pad_softc_t *sc __diagused; 406 407 sc = (pad_softc_t *)opaque; 408 409 KASSERT(mutex_owned(&sc->sc_lock)); 410 411 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 412 play, true, pfil) < 0) 413 return EINVAL; 414 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 415 rec, true, rfil) < 0) 416 return EINVAL; 417 418 if (pfil->req_size > 0) 419 play = &pfil->filters[0].param; 420 switch (play->encoding) { 421 case AUDIO_ENCODING_SLINEAR_LE: 422 if (play->precision == 16 && play->validbits == 16) 423 pfil->prepend(pfil, pad_vol_slinear16_le, play); 424 break; 425 case AUDIO_ENCODING_SLINEAR_BE: 426 if (play->precision == 16 && play->validbits == 16) 427 pfil->prepend(pfil, pad_vol_slinear16_be, play); 428 break; 429 default: 430 break; 431 } 432 433 return 0; 434 } 435 436 static int 437 pad_start_output(void *opaque, void *block, int blksize, 438 void (*intr)(void *), void *intrarg) 439 { 440 pad_softc_t *sc; 441 int err; 442 443 sc = (pad_softc_t *)opaque; 444 445 KASSERT(mutex_owned(&sc->sc_lock)); 446 447 sc->sc_intr = intr; 448 sc->sc_intrarg = intrarg; 449 sc->sc_blksize = blksize; 450 451 err = pad_add_block(sc, block, blksize); 452 453 cv_broadcast(&sc->sc_condvar); 454 455 return err; 456 } 457 458 static int 459 pad_start_input(void *opaque, void *block, int blksize, 460 void (*intr)(void *), void *intrarg) 461 { 462 pad_softc_t *sc __diagused; 463 464 sc = (pad_softc_t *)opaque; 465 466 KASSERT(mutex_owned(&sc->sc_lock)); 467 468 return EOPNOTSUPP; 469 } 470 471 static int 472 pad_halt_output(void *opaque) 473 { 474 pad_softc_t *sc; 475 476 sc = (pad_softc_t *)opaque; 477 478 KASSERT(mutex_owned(&sc->sc_lock)); 479 480 sc->sc_intr = NULL; 481 sc->sc_intrarg = NULL; 482 sc->sc_buflen = 0; 483 sc->sc_rpos = sc->sc_wpos = 0; 484 485 return 0; 486 } 487 488 static int 489 pad_halt_input(void *opaque) 490 { 491 pad_softc_t *sc __diagused; 492 493 sc = (pad_softc_t *)opaque; 494 495 KASSERT(mutex_owned(&sc->sc_lock)); 496 497 return 0; 498 } 499 500 static int 501 pad_getdev(void *opaque, struct audio_device *ret) 502 { 503 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 504 strlcpy(ret->version, osrelease, sizeof(ret->version)); 505 strlcpy(ret->config, "pad", sizeof(ret->config)); 506 507 return 0; 508 } 509 510 static int 511 pad_set_port(void *opaque, mixer_ctrl_t *mc) 512 { 513 pad_softc_t *sc; 514 515 sc = (pad_softc_t *)opaque; 516 517 KASSERT(mutex_owned(&sc->sc_lock)); 518 519 switch (mc->dev) { 520 case PAD_OUTPUT_MASTER_VOLUME: 521 case PAD_INPUT_DAC_VOLUME: 522 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 523 return 0; 524 } 525 526 return ENXIO; 527 } 528 529 static int 530 pad_get_port(void *opaque, mixer_ctrl_t *mc) 531 { 532 pad_softc_t *sc; 533 534 sc = (pad_softc_t *)opaque; 535 536 KASSERT(mutex_owned(&sc->sc_lock)); 537 538 switch (mc->dev) { 539 case PAD_OUTPUT_MASTER_VOLUME: 540 case PAD_INPUT_DAC_VOLUME: 541 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 542 return 0; 543 } 544 545 return ENXIO; 546 } 547 548 static int 549 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 550 { 551 pad_softc_t *sc __diagused; 552 553 sc = (pad_softc_t *)opaque; 554 555 KASSERT(mutex_owned(&sc->sc_lock)); 556 557 switch (di->index) { 558 case PAD_OUTPUT_CLASS: 559 di->mixer_class = PAD_OUTPUT_CLASS; 560 strcpy(di->label.name, AudioCoutputs); 561 di->type = AUDIO_MIXER_CLASS; 562 di->next = di->prev = AUDIO_MIXER_LAST; 563 return 0; 564 case PAD_INPUT_CLASS: 565 di->mixer_class = PAD_INPUT_CLASS; 566 strcpy(di->label.name, AudioCinputs); 567 di->type = AUDIO_MIXER_CLASS; 568 di->next = di->prev = AUDIO_MIXER_LAST; 569 return 0; 570 case PAD_OUTPUT_MASTER_VOLUME: 571 di->mixer_class = PAD_OUTPUT_CLASS; 572 strcpy(di->label.name, AudioNmaster); 573 di->type = AUDIO_MIXER_VALUE; 574 di->next = di->prev = AUDIO_MIXER_LAST; 575 di->un.v.num_channels = 1; 576 strcpy(di->un.v.units.name, AudioNvolume); 577 return 0; 578 case PAD_INPUT_DAC_VOLUME: 579 di->mixer_class = PAD_INPUT_CLASS; 580 strcpy(di->label.name, AudioNdac); 581 di->type = AUDIO_MIXER_VALUE; 582 di->next = di->prev = AUDIO_MIXER_LAST; 583 di->un.v.num_channels = 1; 584 strcpy(di->un.v.units.name, AudioNvolume); 585 return 0; 586 } 587 588 return ENXIO; 589 } 590 591 static int 592 pad_get_props(void *opaque) 593 { 594 pad_softc_t *sc __diagused; 595 596 sc = (pad_softc_t *)opaque; 597 598 KASSERT(mutex_owned(&sc->sc_lock)); 599 600 return 0; 601 } 602 603 static int 604 pad_round_blocksize(void *opaque, int blksize, int mode, 605 const audio_params_t *p) 606 { 607 pad_softc_t *sc __diagused; 608 609 sc = (pad_softc_t *)opaque; 610 KASSERT(mutex_owned(&sc->sc_lock)); 611 612 return PAD_BLKSIZE; 613 } 614 615 static void 616 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 617 { 618 pad_softc_t *sc; 619 620 sc = (pad_softc_t *)opaque; 621 622 *intr = &sc->sc_intr_lock; 623 *thread = &sc->sc_lock; 624 } 625 626 #ifdef _MODULE 627 628 MODULE(MODULE_CLASS_DRIVER, pad, NULL); 629 630 static const struct cfiattrdata audiobuscf_iattrdata = { 631 "audiobus", 0, { { NULL, NULL, 0 }, } 632 }; 633 static const struct cfiattrdata * const pad_attrs[] = { 634 &audiobuscf_iattrdata, NULL 635 }; 636 637 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 638 extern struct cfattach pad_ca; 639 static int padloc[] = { -1, -1 }; 640 641 static struct cfdata pad_cfdata[] = { 642 { 643 .cf_name = "pad", 644 .cf_atname = "pad", 645 .cf_unit = 0, 646 .cf_fstate = FSTATE_STAR, 647 .cf_loc = padloc, 648 .cf_flags = 0, 649 .cf_pspec = NULL, 650 }, 651 { NULL, NULL, 0, 0, NULL, 0, NULL } 652 }; 653 654 static int 655 pad_modcmd(modcmd_t cmd, void *arg) 656 { 657 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 658 int error; 659 660 switch (cmd) { 661 case MODULE_CMD_INIT: 662 error = config_cfdriver_attach(&pad_cd); 663 if (error) { 664 return error; 665 } 666 667 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 668 if (error) { 669 config_cfdriver_detach(&pad_cd); 670 aprint_error("%s: unable to register cfattach\n", 671 pad_cd.cd_name); 672 673 return error; 674 } 675 676 error = config_cfdata_attach(pad_cfdata, 1); 677 if (error) { 678 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 679 config_cfdriver_detach(&pad_cd); 680 aprint_error("%s: unable to register cfdata\n", 681 pad_cd.cd_name); 682 683 return error; 684 } 685 686 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, &pad_cdevsw, &cmajor); 687 if (error) { 688 error = config_cfdata_detach(pad_cfdata); 689 if (error) { 690 return error; 691 } 692 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 693 config_cfdriver_detach(&pad_cd); 694 aprint_error("%s: unable to register devsw\n", 695 pad_cd.cd_name); 696 697 return error; 698 } 699 700 (void)config_attach_pseudo(pad_cfdata); 701 702 return 0; 703 case MODULE_CMD_FINI: 704 error = config_cfdata_detach(pad_cfdata); 705 if (error) { 706 return error; 707 } 708 709 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 710 config_cfdriver_detach(&pad_cd); 711 devsw_detach(NULL, &pad_cdevsw); 712 713 return 0; 714 default: 715 return ENOTTY; 716 } 717 } 718 719 #endif 720
Indexes created Thu Oct 02 14:10:14 GMT 2025