pad.c revision 1.16
1 /* $NetBSD: pad.c,v 1.16 2010/09/03 19:19:48 jmcneill 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 1.16 2010/09/03 19:19:48 jmcneill 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 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 typedef struct pad_block { 58 uint8_t *pb_ptr; 59 int pb_len; 60 } pad_block_t; 61 62 enum { 63 PAD_OUTPUT_CLASS, 64 PAD_INPUT_CLASS, 65 PAD_OUTPUT_MASTER_VOLUME, 66 PAD_INPUT_DAC_VOLUME, 67 PAD_ENUM_LAST, 68 }; 69 70 static int pad_match(device_t, cfdata_t, void *); 71 static void pad_attach(device_t, device_t, void *); 72 static int pad_detach(device_t, int); 73 static void pad_childdet(device_t, device_t); 74 75 static int pad_query_encoding(void *, struct audio_encoding *); 76 static int pad_set_params(void *, int, int, 77 audio_params_t *, audio_params_t *, 78 stream_filter_list_t *, stream_filter_list_t *); 79 static int pad_start_output(void *, void *, int, 80 void (*)(void *), void *); 81 static int pad_start_input(void *, void *, int, 82 void (*)(void *), void *); 83 static int pad_halt_output(void *); 84 static int pad_halt_input(void *); 85 static int pad_getdev(void *, struct audio_device *); 86 static int pad_set_port(void *, mixer_ctrl_t *); 87 static int pad_get_port(void *, mixer_ctrl_t *); 88 static int pad_query_devinfo(void *, mixer_devinfo_t *); 89 static int pad_get_props(void *); 90 static int pad_round_blocksize(void *, int, int, const audio_params_t *); 91 92 static const struct audio_hw_if pad_hw_if = { 93 .query_encoding = pad_query_encoding, 94 .set_params = pad_set_params, 95 .start_output = pad_start_output, 96 .start_input = pad_start_input, 97 .halt_output = pad_halt_output, 98 .halt_input = pad_halt_input, 99 .getdev = pad_getdev, 100 .set_port = pad_set_port, 101 .get_port = pad_get_port, 102 .query_devinfo = pad_query_devinfo, 103 .get_props = pad_get_props, 104 .round_blocksize = pad_round_blocksize, 105 }; 106 107 #define PAD_NFORMATS 1 108 static const struct audio_format pad_formats[PAD_NFORMATS] = { 109 { NULL, AUMODE_PLAY|AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16, 110 2, AUFMT_STEREO, 1, { 44100 } }, 111 }; 112 113 extern void padattach(int); 114 115 static int pad_add_block(pad_softc_t *, uint8_t *, int); 116 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 117 118 dev_type_open(pad_open); 119 dev_type_close(pad_close); 120 dev_type_read(pad_read); 121 122 const struct cdevsw pad_cdevsw = { 123 .d_open = pad_open, 124 .d_close = pad_close, 125 .d_read = pad_read, 126 .d_write = nowrite, 127 .d_ioctl = noioctl, 128 .d_stop = nostop, 129 .d_tty = notty, 130 .d_poll = nopoll, 131 .d_mmap = nommap, 132 .d_kqfilter = nokqfilter, 133 .d_flag = D_OTHER, 134 }; 135 136 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 137 NULL, NULL, pad_childdet); 138 139 void 140 padattach(int n) 141 { 142 int i, err; 143 cfdata_t cf; 144 145 aprint_debug("pad: requested %d units\n", n); 146 147 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 148 if (err) { 149 aprint_error("%s: couldn't register cfattach: %d\n", 150 pad_cd.cd_name, err); 151 config_cfdriver_detach(&pad_cd); 152 return; 153 } 154 155 for (i = 0; i < n; i++) { 156 cf = kmem_alloc(sizeof(struct cfdata), KM_NOSLEEP); 157 if (cf == NULL) { 158 aprint_error("%s: couldn't allocate cfdata\n", 159 pad_cd.cd_name); 160 continue; 161 } 162 cf->cf_name = pad_cd.cd_name; 163 cf->cf_atname = pad_cd.cd_name; 164 cf->cf_unit = i; 165 cf->cf_fstate = FSTATE_STAR; 166 167 (void)config_attach_pseudo(cf); 168 } 169 170 return; 171 } 172 173 static int 174 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 175 { 176 int l; 177 178 if (sc->sc_open == 0) 179 return EIO; 180 181 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 182 return ENOBUFS; 183 184 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 185 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 186 else { 187 l = PAD_BUFSIZE - sc->sc_wpos; 188 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 189 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 190 } 191 192 sc->sc_wpos += blksize; 193 if (sc->sc_wpos > PAD_BUFSIZE) 194 sc->sc_wpos -= PAD_BUFSIZE; 195 196 sc->sc_buflen += blksize; 197 198 return 0; 199 } 200 201 static int 202 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 203 { 204 int l; 205 206 KASSERT(pb != NULL); 207 208 if (sc->sc_buflen < blksize) 209 return ERESTART; 210 211 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 212 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 213 pb->pb_len = blksize; 214 sc->sc_rpos += blksize; 215 } else { 216 l = PAD_BUFSIZE - sc->sc_rpos; 217 pb->pb_len = l; 218 sc->sc_rpos = 0; 219 } 220 sc->sc_buflen -= pb->pb_len; 221 222 return 0; 223 } 224 225 static int 226 pad_match(device_t parent, cfdata_t data, void *opaque) 227 { 228 return 1; 229 } 230 231 static void 232 pad_childdet(device_t self, device_t child) 233 { 234 pad_softc_t *sc = device_private(self); 235 236 sc->sc_audiodev = NULL; 237 } 238 239 static void 240 pad_attach(device_t parent, device_t self, void *opaque) 241 { 242 pad_softc_t *sc = device_private(self); 243 244 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 245 246 sc->sc_dev = self; 247 sc->sc_open = 0; 248 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 249 &sc->sc_encodings) != 0) { 250 aprint_error_dev(self, "couldn't create encodings\n"); 251 return; 252 } 253 254 cv_init(&sc->sc_condvar, device_xname(self)); 255 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_SCHED); 256 257 sc->sc_swvol = 255; 258 sc->sc_buflen = 0; 259 sc->sc_rpos = sc->sc_wpos = 0; 260 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 261 262 if (!pmf_device_register(self, NULL, NULL)) 263 aprint_error_dev(self, "couldn't establish power handler\n"); 264 265 return; 266 } 267 268 static int 269 pad_detach(device_t self, int flags) 270 { 271 pad_softc_t *sc = device_private(self); 272 int cmaj, mn, rc; 273 274 cmaj = cdevsw_lookup_major(&pad_cdevsw); 275 mn = device_unit(self); 276 vdevgone(cmaj, mn, mn, VCHR); 277 278 if ((rc = config_detach_children(self, flags)) != 0) 279 return rc; 280 281 pmf_device_deregister(self); 282 283 mutex_destroy(&sc->sc_mutex); 284 cv_destroy(&sc->sc_condvar); 285 286 auconv_delete_encodings(sc->sc_encodings); 287 288 return 0; 289 } 290 291 int 292 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 293 { 294 pad_softc_t *sc; 295 296 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 297 if (sc == NULL) 298 return ENXIO; 299 300 if (sc->sc_open++) { 301 sc->sc_open--; 302 return EBUSY; 303 } 304 305 return 0; 306 } 307 308 int 309 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 310 { 311 pad_softc_t *sc; 312 313 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 314 if (sc == NULL) 315 return ENXIO; 316 317 KASSERT(sc->sc_open > 0); 318 sc->sc_open--; 319 320 return 0; 321 } 322 323 int 324 pad_read(dev_t dev, struct uio *uio, int flags) 325 { 326 pad_softc_t *sc; 327 pad_block_t pb; 328 void (*intr)(void *); 329 void *intrarg; 330 int err; 331 332 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 333 if (sc == NULL) 334 return ENXIO; 335 336 err = 0; 337 338 intr = sc->sc_intr; 339 intrarg = sc->sc_intrarg; 340 341 while (uio->uio_resid > 0 && !err) { 342 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 343 if (!err) 344 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 345 else { 346 if (intr) { 347 (*intr)(intrarg); 348 intr = sc->sc_intr; 349 intrarg = sc->sc_intrarg; 350 err = 0; 351 continue; 352 } 353 354 mutex_enter(&sc->sc_mutex); 355 err = cv_timedwait_sig(&sc->sc_condvar, &sc->sc_mutex, 356 hz/100); 357 if (err != 0 && err != EWOULDBLOCK) { 358 mutex_exit(&sc->sc_mutex); 359 if (err != ERESTART) 360 aprint_error_dev(sc->sc_dev, 361 "cv_timedwait_sig returned %d\n", 362 err); 363 return EINTR; 364 } 365 intr = sc->sc_intr; 366 intrarg = sc->sc_intrarg; 367 mutex_exit(&sc->sc_mutex); 368 err = 0; 369 } 370 } 371 372 if (intr) 373 (*intr)(intrarg); 374 375 return err; 376 } 377 378 static int 379 pad_query_encoding(void *opaque, struct audio_encoding *ae) 380 { 381 pad_softc_t *sc; 382 383 sc = (pad_softc_t *)opaque; 384 385 return auconv_query_encoding(sc->sc_encodings, ae); 386 } 387 388 static int 389 pad_set_params(void *opaque, int setmode, int usemode, 390 audio_params_t *play, audio_params_t *rec, 391 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 392 { 393 pad_softc_t *sc; 394 395 sc = (pad_softc_t *)opaque; 396 397 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 398 play, true, pfil) < 0) 399 return EINVAL; 400 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 401 rec, true, rfil) < 0) 402 return EINVAL; 403 404 if (pfil->req_size > 0) 405 play = &pfil->filters[0].param; 406 switch (play->encoding) { 407 case AUDIO_ENCODING_SLINEAR_LE: 408 if (play->precision == 16 && play->validbits == 16) 409 pfil->prepend(pfil, pad_vol_slinear16_le, play); 410 break; 411 case AUDIO_ENCODING_SLINEAR_BE: 412 if (play->precision == 16 && play->validbits == 16) 413 pfil->prepend(pfil, pad_vol_slinear16_be, play); 414 break; 415 default: 416 break; 417 } 418 419 return 0; 420 } 421 422 static int 423 pad_start_output(void *opaque, void *block, int blksize, 424 void (*intr)(void *), void *intrarg) 425 { 426 pad_softc_t *sc; 427 int err; 428 429 sc = (pad_softc_t *)opaque; 430 431 mutex_enter(&sc->sc_mutex); 432 433 sc->sc_intr = intr; 434 sc->sc_intrarg = intrarg; 435 sc->sc_blksize = blksize; 436 437 err = pad_add_block(sc, block, blksize); 438 439 cv_signal(&sc->sc_condvar); 440 441 mutex_exit(&sc->sc_mutex); 442 443 return err; 444 } 445 446 static int 447 pad_start_input(void *opaque, void *block, int blksize, 448 void (*intr)(void *), void *intrarg) 449 { 450 return EINVAL; 451 } 452 453 static int 454 pad_halt_output(void *opaque) 455 { 456 pad_softc_t *sc; 457 458 sc = (pad_softc_t *)opaque; 459 sc->sc_intr = NULL; 460 sc->sc_intrarg = NULL; 461 sc->sc_buflen = 0; 462 sc->sc_rpos = sc->sc_wpos = 0; 463 464 return 0; 465 } 466 467 static int 468 pad_halt_input(void *opaque) 469 { 470 return 0; 471 } 472 473 static int 474 pad_getdev(void *opaque, struct audio_device *ret) 475 { 476 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 477 strlcpy(ret->version, osrelease, sizeof(ret->version)); 478 strlcpy(ret->config, "pad", sizeof(ret->config)); 479 480 return 0; 481 } 482 483 static int 484 pad_set_port(void *opaque, mixer_ctrl_t *mc) 485 { 486 pad_softc_t *sc; 487 488 sc = (pad_softc_t *)opaque; 489 490 switch (mc->dev) { 491 case PAD_OUTPUT_MASTER_VOLUME: 492 case PAD_INPUT_DAC_VOLUME: 493 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 494 return 0; 495 } 496 497 return ENXIO; 498 } 499 500 static int 501 pad_get_port(void *opaque, mixer_ctrl_t *mc) 502 { 503 pad_softc_t *sc; 504 505 sc = (pad_softc_t *)opaque; 506 507 switch (mc->dev) { 508 case PAD_OUTPUT_MASTER_VOLUME: 509 case PAD_INPUT_DAC_VOLUME: 510 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 511 return 0; 512 } 513 514 return ENXIO; 515 } 516 517 static int 518 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 519 { 520 pad_softc_t *sc; 521 522 sc = (pad_softc_t *)opaque; 523 524 switch (di->index) { 525 case PAD_OUTPUT_CLASS: 526 di->mixer_class = PAD_OUTPUT_CLASS; 527 strcpy(di->label.name, AudioCoutputs); 528 di->type = AUDIO_MIXER_CLASS; 529 di->next = di->prev = AUDIO_MIXER_LAST; 530 return 0; 531 case PAD_INPUT_CLASS: 532 di->mixer_class = PAD_INPUT_CLASS; 533 strcpy(di->label.name, AudioCinputs); 534 di->type = AUDIO_MIXER_CLASS; 535 di->next = di->prev = AUDIO_MIXER_LAST; 536 return 0; 537 case PAD_OUTPUT_MASTER_VOLUME: 538 di->mixer_class = PAD_OUTPUT_CLASS; 539 strcpy(di->label.name, AudioNmaster); 540 di->type = AUDIO_MIXER_VALUE; 541 di->next = di->prev = AUDIO_MIXER_LAST; 542 di->un.v.num_channels = 1; 543 strcpy(di->un.v.units.name, AudioNvolume); 544 return 0; 545 case PAD_INPUT_DAC_VOLUME: 546 di->mixer_class = PAD_INPUT_CLASS; 547 strcpy(di->label.name, AudioNdac); 548 di->type = AUDIO_MIXER_VALUE; 549 di->next = di->prev = AUDIO_MIXER_LAST; 550 di->un.v.num_channels = 1; 551 strcpy(di->un.v.units.name, AudioNvolume); 552 return 0; 553 } 554 555 return ENXIO; 556 } 557 558 static int 559 pad_get_props(void *opaque) 560 { 561 return 0; 562 } 563 564 static int 565 pad_round_blocksize(void *opaque, int blksize, int mode, 566 const audio_params_t *p) 567 { 568 return PAD_BLKSIZE; 569 } 570 571 #ifdef _MODULE 572 573 MODULE(MODULE_CLASS_DRIVER, pad, NULL); 574 575 static const struct cfiattrdata audiobuscf_iattrdata = { 576 "audiobus", 0, { { NULL, NULL, 0 }, } 577 }; 578 static const struct cfiattrdata * const pad_attrs[] = { 579 &audiobuscf_iattrdata, NULL 580 }; 581 582 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 583 extern struct cfattach pad_ca; 584 static int padloc[] = { -1, -1 }; 585 586 static struct cfdata pad_cfdata[] = { 587 { 588 .cf_name = "pad", 589 .cf_atname = "pad", 590 .cf_unit = 0, 591 .cf_fstate = FSTATE_STAR, 592 .cf_loc = padloc, 593 .cf_flags = 0, 594 .cf_pspec = NULL, 595 }, 596 { NULL, NULL, 0, 0, NULL, 0, NULL } 597 }; 598 599 static int 600 pad_modcmd(modcmd_t cmd, void *arg) 601 { 602 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 603 int error, s; 604 605 switch (cmd) { 606 case MODULE_CMD_INIT: 607 error = config_cfdriver_attach(&pad_cd); 608 if (error) { 609 return error; 610 } 611 612 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 613 if (error) { 614 config_cfdriver_detach(&pad_cd); 615 aprint_error("%s: unable to register cfattach\n", 616 pad_cd.cd_name); 617 618 return error; 619 } 620 621 s = splaudio(); 622 error = config_cfdata_attach(pad_cfdata, 1); 623 splx(s); 624 if (error) { 625 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 626 config_cfdriver_detach(&pad_cd); 627 aprint_error("%s: unable to register cfdata\n", 628 pad_cd.cd_name); 629 630 return error; 631 } 632 633 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, &pad_cdevsw, &cmajor); 634 if (error) { 635 error = config_cfdata_detach(pad_cfdata); 636 if (error) { 637 return error; 638 } 639 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 640 config_cfdriver_detach(&pad_cd); 641 aprint_error("%s: unable to register devsw\n", 642 pad_cd.cd_name); 643 644 return error; 645 } 646 647 (void)config_attach_pseudo(pad_cfdata); 648 649 return 0; 650 case MODULE_CMD_FINI: 651 error = config_cfdata_detach(pad_cfdata); 652 if (error) { 653 return error; 654 } 655 656 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 657 config_cfdriver_detach(&pad_cd); 658 devsw_detach(NULL, &pad_cdevsw); 659 660 return 0; 661 default: 662 return ENOTTY; 663 } 664 } 665 666 #endif 667
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