pad.c revision 1.10.6.1
1 /* $NetBSD: pad.c,v 1.10.6.1 2008/12/11 19:49:30 ad 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 1.10.6.1 2008/12/11 19:49:30 ad 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/atomic.h> 45 46 #include <dev/audio_if.h> 47 #include <dev/audiovar.h> 48 #include <dev/auconv.h> 49 50 #include <dev/pad/padvar.h> 51 #include <dev/pad/padvol.h> 52 53 #define PADUNIT(x) minor(x) 54 55 extern struct cfdriver pad_cd; 56 57 static struct audio_device pad_device = { 58 "Pseudo Audio", 59 "1.0", 60 "pad", 61 }; 62 63 typedef struct pad_block { 64 uint8_t *pb_ptr; 65 int pb_len; 66 } pad_block_t; 67 68 enum { 69 PAD_OUTPUT_CLASS, 70 PAD_INPUT_CLASS, 71 PAD_OUTPUT_MASTER_VOLUME, 72 PAD_INPUT_DAC_VOLUME, 73 PAD_ENUM_LAST, 74 }; 75 76 static int pad_match(device_t, cfdata_t, void *); 77 static void pad_attach(device_t, device_t, void *); 78 static int pad_detach(device_t, int); 79 static void pad_childdet(device_t, device_t); 80 81 static int pad_query_encoding(void *, struct audio_encoding *); 82 static int pad_set_params(void *, int, int, 83 audio_params_t *, audio_params_t *, 84 stream_filter_list_t *, stream_filter_list_t *); 85 static int pad_start_output(void *, void *, int, 86 void (*)(void *), void *); 87 static int pad_start_input(void *, void *, int, 88 void (*)(void *), void *); 89 static int pad_halt_output(void *); 90 static int pad_halt_input(void *); 91 static int pad_getdev(void *, struct audio_device *); 92 static int pad_set_port(void *, mixer_ctrl_t *); 93 static int pad_get_port(void *, mixer_ctrl_t *); 94 static int pad_query_devinfo(void *, mixer_devinfo_t *); 95 static int pad_get_props(void *); 96 static int pad_round_blocksize(void *, int, int, const audio_params_t *); 97 static void pad_get_locks(void *, kmutex_t **, kmutex_t **); 98 99 static const struct audio_hw_if pad_hw_if = { 100 .query_encoding = pad_query_encoding, 101 .set_params = pad_set_params, 102 .start_output = pad_start_output, 103 .start_input = pad_start_input, 104 .halt_output = pad_halt_output, 105 .halt_input = pad_halt_input, 106 .getdev = pad_getdev, 107 .set_port = pad_set_port, 108 .get_port = pad_get_port, 109 .query_devinfo = pad_query_devinfo, 110 .get_props = pad_get_props, 111 .round_blocksize = pad_round_blocksize, 112 .get_locks = pad_get_locks, 113 }; 114 115 #define PAD_NFORMATS 1 116 static const struct audio_format pad_formats[PAD_NFORMATS] = { 117 { NULL, AUMODE_PLAY|AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16, 118 2, AUFMT_STEREO, 1, { 44100 } }, 119 }; 120 121 extern void padattach(int); 122 123 static int pad_add_block(pad_softc_t *, uint8_t *, int); 124 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 125 126 dev_type_open(pad_open); 127 dev_type_close(pad_close); 128 dev_type_read(pad_read); 129 130 const struct cdevsw pad_cdevsw = { 131 .d_open = pad_open, 132 .d_close = pad_close, 133 .d_read = pad_read, 134 .d_write = nowrite, 135 .d_ioctl = noioctl, 136 .d_stop = nostop, 137 .d_tty = notty, 138 .d_poll = nopoll, 139 .d_mmap = nommap, 140 .d_kqfilter = nokqfilter, 141 .d_flag = D_OTHER | D_MPSAFE, 142 }; 143 144 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 145 NULL, NULL, pad_childdet); 146 147 void 148 padattach(int n) 149 { 150 int i, err; 151 cfdata_t cf; 152 153 #ifdef DEBUG 154 printf("pad: requested %d units\n", n); 155 #endif 156 157 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 158 if (err) { 159 aprint_error("%s: couldn't register cfattach: %d\n", 160 pad_cd.cd_name, err); 161 config_cfdriver_detach(&pad_cd); 162 return; 163 } 164 165 for (i = 0; i < n; i++) { 166 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 167 if (cf == NULL) { 168 aprint_error("%s: couldn't allocate cfdata\n", 169 pad_cd.cd_name); 170 continue; 171 } 172 cf->cf_name = pad_cd.cd_name; 173 cf->cf_atname = pad_cd.cd_name; 174 cf->cf_unit = i; 175 cf->cf_fstate = FSTATE_STAR; 176 177 (void)config_attach_pseudo(cf); 178 } 179 180 return; 181 } 182 183 static int 184 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 185 { 186 int l; 187 188 KASSERT(mutex_owned(&sc->sc_lock)); 189 190 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 191 return ENOBUFS; 192 193 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 194 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 195 else { 196 l = PAD_BUFSIZE - sc->sc_wpos; 197 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 198 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 199 } 200 201 sc->sc_wpos += blksize; 202 if (sc->sc_wpos > PAD_BUFSIZE) 203 sc->sc_wpos -= PAD_BUFSIZE; 204 205 sc->sc_buflen += blksize; 206 207 return 0; 208 } 209 210 static int 211 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 212 { 213 int l; 214 215 KASSERT(mutex_owned(&sc->sc_lock)); 216 KASSERT(pb != NULL); 217 218 if (sc->sc_buflen < blksize) 219 return ERESTART; 220 221 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 222 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 223 pb->pb_len = blksize; 224 sc->sc_rpos += blksize; 225 } else { 226 l = PAD_BUFSIZE - sc->sc_rpos; 227 pb->pb_len = l; 228 sc->sc_rpos = 0; 229 } 230 sc->sc_buflen -= pb->pb_len; 231 232 return 0; 233 } 234 235 static int 236 pad_match(device_t parent, cfdata_t data, void *opaque) 237 { 238 239 return 1; 240 } 241 242 static void 243 pad_childdet(device_t self, device_t child) 244 { 245 pad_softc_t *sc = device_private(self); 246 247 sc->sc_audiodev = NULL; 248 } 249 250 static void 251 pad_attach(device_t parent, device_t self, void *opaque) 252 { 253 pad_softc_t *sc = device_private(self); 254 255 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 256 257 sc->sc_dev = self; 258 sc->sc_open = 0; 259 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 260 &sc->sc_encodings) != 0) { 261 aprint_error_dev(self, "couldn't create encodings\n"); 262 return; 263 } 264 265 cv_init(&sc->sc_condvar, device_xname(self)); 266 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 267 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 268 269 sc->sc_swvol = 255; 270 sc->sc_buflen = 0; 271 sc->sc_rpos = sc->sc_wpos = 0; 272 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 273 274 if (!pmf_device_register(self, NULL, NULL)) 275 aprint_error_dev(self, "couldn't establish power handler\n"); 276 277 return; 278 } 279 280 static int 281 pad_detach(device_t self, int flags) 282 { 283 pad_softc_t *sc = device_private(self); 284 int cmaj, mn, rc; 285 286 cmaj = cdevsw_lookup_major(&pad_cdevsw); 287 mn = device_unit(self); 288 vdevgone(cmaj, mn, mn, VCHR); 289 290 if ((rc = config_detach_children(self, flags)) != 0) 291 return rc; 292 293 pmf_device_deregister(self); 294 295 mutex_destroy(&sc->sc_lock); 296 mutex_destroy(&sc->sc_intr_lock); 297 cv_destroy(&sc->sc_condvar); 298 299 auconv_delete_encodings(sc->sc_encodings); 300 301 return 0; 302 } 303 304 int 305 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 306 { 307 pad_softc_t *sc; 308 309 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 310 if (sc == NULL) 311 return ENODEV; 312 313 if (atomic_swap_uint(&sc->sc_open, 1) != 0) { 314 return EBUSY; 315 } 316 317 return 0; 318 } 319 320 int 321 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 322 { 323 pad_softc_t *sc; 324 325 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 326 if (sc == NULL) 327 return ENODEV; 328 329 KASSERT(sc->sc_open > 0); 330 sc->sc_open = 0; 331 332 return 0; 333 } 334 335 int 336 pad_read(dev_t dev, struct uio *uio, int flags) 337 { 338 pad_softc_t *sc; 339 pad_block_t pb; 340 void (*intr)(void *); 341 void *intrarg; 342 int err; 343 344 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 345 if (sc == NULL) 346 return ENODEV; 347 348 err = 0; 349 350 mutex_enter(&sc->sc_lock); 351 intr = sc->sc_intr; 352 intrarg = sc->sc_intrarg; 353 while (uio->uio_resid > 0 && !err) { 354 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 355 if (!err) { 356 mutex_exit(&sc->sc_lock); 357 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 358 mutex_enter(&sc->sc_lock); 359 continue; 360 } 361 if (intr) { 362 mutex_enter(&sc->sc_intr_lock); 363 (*intr)(intrarg); 364 mutex_exit(&sc->sc_intr_lock); 365 intr = sc->sc_intr; 366 intrarg = sc->sc_intrarg; 367 err = 0; 368 continue; 369 } 370 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 371 if (err != 0) { 372 mutex_exit(&sc->sc_lock); 373 return err; 374 } 375 intr = sc->sc_intr; 376 intrarg = sc->sc_intrarg; 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; 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; 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; 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 pad_softc_t *sc; 504 505 sc = (pad_softc_t *)opaque; 506 507 KASSERT(mutex_owned(&sc->sc_lock)); 508 509 *ret = pad_device; 510 511 return 0; 512 } 513 514 static int 515 pad_set_port(void *opaque, mixer_ctrl_t *mc) 516 { 517 pad_softc_t *sc; 518 519 sc = (pad_softc_t *)opaque; 520 521 KASSERT(mutex_owned(&sc->sc_lock)); 522 523 switch (mc->dev) { 524 case PAD_OUTPUT_MASTER_VOLUME: 525 case PAD_INPUT_DAC_VOLUME: 526 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 527 return 0; 528 } 529 530 return ENXIO; 531 } 532 533 static int 534 pad_get_port(void *opaque, mixer_ctrl_t *mc) 535 { 536 pad_softc_t *sc; 537 538 sc = (pad_softc_t *)opaque; 539 540 KASSERT(mutex_owned(&sc->sc_lock)); 541 542 switch (mc->dev) { 543 case PAD_OUTPUT_MASTER_VOLUME: 544 case PAD_INPUT_DAC_VOLUME: 545 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 546 return 0; 547 } 548 549 return ENXIO; 550 } 551 552 static int 553 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 554 { 555 pad_softc_t *sc; 556 557 sc = (pad_softc_t *)opaque; 558 559 KASSERT(mutex_owned(&sc->sc_lock)); 560 561 switch (di->index) { 562 case PAD_OUTPUT_CLASS: 563 di->mixer_class = PAD_OUTPUT_CLASS; 564 strcpy(di->label.name, AudioCoutputs); 565 di->type = AUDIO_MIXER_CLASS; 566 di->next = di->prev = AUDIO_MIXER_LAST; 567 return 0; 568 case PAD_INPUT_CLASS: 569 di->mixer_class = PAD_INPUT_CLASS; 570 strcpy(di->label.name, AudioCinputs); 571 di->type = AUDIO_MIXER_CLASS; 572 di->next = di->prev = AUDIO_MIXER_LAST; 573 return 0; 574 case PAD_OUTPUT_MASTER_VOLUME: 575 di->mixer_class = PAD_OUTPUT_CLASS; 576 strcpy(di->label.name, AudioNmaster); 577 di->type = AUDIO_MIXER_VALUE; 578 di->next = di->prev = AUDIO_MIXER_LAST; 579 di->un.v.num_channels = 1; 580 strcpy(di->un.v.units.name, AudioNvolume); 581 return 0; 582 case PAD_INPUT_DAC_VOLUME: 583 di->mixer_class = PAD_INPUT_CLASS; 584 strcpy(di->label.name, AudioNdac); 585 di->type = AUDIO_MIXER_VALUE; 586 di->next = di->prev = AUDIO_MIXER_LAST; 587 di->un.v.num_channels = 1; 588 strcpy(di->un.v.units.name, AudioNvolume); 589 return 0; 590 } 591 592 return ENXIO; 593 } 594 595 static int 596 pad_get_props(void *opaque) 597 { 598 pad_softc_t *sc; 599 600 sc = (pad_softc_t *)opaque; 601 602 KASSERT(mutex_owned(&sc->sc_lock)); 603 604 return 0; 605 } 606 607 static int 608 pad_round_blocksize(void *opaque, int blksize, int mode, 609 const audio_params_t *p) 610 { 611 pad_softc_t *sc; 612 613 sc = (pad_softc_t *)opaque; 614 615 KASSERT(mutex_owned(&sc->sc_lock)); 616 617 return PAD_BLKSIZE; 618 } 619 620 static void 621 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 622 { 623 struct pad_softc *sc; 624 625 sc = (pad_softc_t *)opaque; 626 627 *intr = &sc->sc_intr_lock; 628 *thread = &sc->sc_lock; 629 } 630
Indexes created Wed Oct 15 16:09:53 GMT 2025