pad.c revision 1.6.4.4
1 /* $NetBSD: pad.c,v 1.6.4.4 2010/08/11 22:53:41 yamt 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 1.6.4.4 2010/08/11 22:53:41 yamt 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 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 98 static const struct audio_hw_if pad_hw_if = { 99 .query_encoding = pad_query_encoding, 100 .set_params = pad_set_params, 101 .start_output = pad_start_output, 102 .start_input = pad_start_input, 103 .halt_output = pad_halt_output, 104 .halt_input = pad_halt_input, 105 .getdev = pad_getdev, 106 .set_port = pad_set_port, 107 .get_port = pad_get_port, 108 .query_devinfo = pad_query_devinfo, 109 .get_props = pad_get_props, 110 .round_blocksize = pad_round_blocksize, 111 }; 112 113 #define PAD_NFORMATS 1 114 static const struct audio_format pad_formats[PAD_NFORMATS] = { 115 { NULL, AUMODE_PLAY|AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16, 116 2, AUFMT_STEREO, 1, { 44100 } }, 117 }; 118 119 extern void padattach(int); 120 121 static int pad_add_block(pad_softc_t *, uint8_t *, int); 122 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 123 124 dev_type_open(pad_open); 125 dev_type_close(pad_close); 126 dev_type_read(pad_read); 127 128 const struct cdevsw pad_cdevsw = { 129 .d_open = pad_open, 130 .d_close = pad_close, 131 .d_read = pad_read, 132 .d_write = nowrite, 133 .d_ioctl = noioctl, 134 .d_stop = nostop, 135 .d_tty = notty, 136 .d_poll = nopoll, 137 .d_mmap = nommap, 138 .d_kqfilter = nokqfilter, 139 .d_flag = D_OTHER, 140 }; 141 142 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 143 NULL, NULL, pad_childdet); 144 145 void 146 padattach(int n) 147 { 148 int i, err; 149 cfdata_t cf; 150 151 aprint_debug("pad: requested %d units\n", n); 152 153 err = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 154 if (err) { 155 aprint_error("%s: couldn't register cfattach: %d\n", 156 pad_cd.cd_name, err); 157 config_cfdriver_detach(&pad_cd); 158 return; 159 } 160 161 for (i = 0; i < n; i++) { 162 cf = kmem_alloc(sizeof(struct cfdata), KM_NOSLEEP); 163 if (cf == NULL) { 164 aprint_error("%s: couldn't allocate cfdata\n", 165 pad_cd.cd_name); 166 continue; 167 } 168 cf->cf_name = pad_cd.cd_name; 169 cf->cf_atname = pad_cd.cd_name; 170 cf->cf_unit = i; 171 cf->cf_fstate = FSTATE_STAR; 172 173 (void)config_attach_pseudo(cf); 174 } 175 176 return; 177 } 178 179 static int 180 pad_add_block(pad_softc_t *sc, uint8_t *blk, int blksize) 181 { 182 int l; 183 184 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 185 return ENOBUFS; 186 187 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 188 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 189 else { 190 l = PAD_BUFSIZE - sc->sc_wpos; 191 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 192 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 193 } 194 195 sc->sc_wpos += blksize; 196 if (sc->sc_wpos > PAD_BUFSIZE) 197 sc->sc_wpos -= PAD_BUFSIZE; 198 199 sc->sc_buflen += blksize; 200 201 return 0; 202 } 203 204 static int 205 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 206 { 207 int l; 208 209 KASSERT(pb != NULL); 210 211 if (sc->sc_buflen < blksize) 212 return ERESTART; 213 214 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 215 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 216 pb->pb_len = blksize; 217 sc->sc_rpos += blksize; 218 } else { 219 l = PAD_BUFSIZE - sc->sc_rpos; 220 pb->pb_len = l; 221 sc->sc_rpos = 0; 222 } 223 sc->sc_buflen -= pb->pb_len; 224 225 return 0; 226 } 227 228 static int 229 pad_match(device_t parent, cfdata_t data, void *opaque) 230 { 231 return 1; 232 } 233 234 static void 235 pad_childdet(device_t self, device_t child) 236 { 237 pad_softc_t *sc = device_private(self); 238 239 sc->sc_audiodev = NULL; 240 } 241 242 static void 243 pad_attach(device_t parent, device_t self, void *opaque) 244 { 245 pad_softc_t *sc = device_private(self); 246 247 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 248 249 sc->sc_dev = self; 250 sc->sc_open = 0; 251 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 252 &sc->sc_encodings) != 0) { 253 aprint_error_dev(self, "couldn't create encodings\n"); 254 return; 255 } 256 257 cv_init(&sc->sc_condvar, device_xname(self)); 258 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_SCHED); 259 260 sc->sc_swvol = 255; 261 sc->sc_buflen = 0; 262 sc->sc_rpos = sc->sc_wpos = 0; 263 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 264 265 if (!pmf_device_register(self, NULL, NULL)) 266 aprint_error_dev(self, "couldn't establish power handler\n"); 267 268 return; 269 } 270 271 static int 272 pad_detach(device_t self, int flags) 273 { 274 pad_softc_t *sc = device_private(self); 275 int cmaj, mn, rc; 276 277 cmaj = cdevsw_lookup_major(&pad_cdevsw); 278 mn = device_unit(self); 279 vdevgone(cmaj, mn, mn, VCHR); 280 281 if ((rc = config_detach_children(self, flags)) != 0) 282 return rc; 283 284 pmf_device_deregister(self); 285 286 mutex_destroy(&sc->sc_mutex); 287 cv_destroy(&sc->sc_condvar); 288 289 auconv_delete_encodings(sc->sc_encodings); 290 291 return 0; 292 } 293 294 int 295 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 296 { 297 pad_softc_t *sc; 298 299 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 300 if (sc == NULL) 301 return ENXIO; 302 303 if (sc->sc_open++) { 304 sc->sc_open--; 305 return EBUSY; 306 } 307 308 return 0; 309 } 310 311 int 312 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 313 { 314 pad_softc_t *sc; 315 316 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 317 if (sc == NULL) 318 return ENXIO; 319 320 KASSERT(sc->sc_open > 0); 321 sc->sc_open--; 322 323 return 0; 324 } 325 326 int 327 pad_read(dev_t dev, struct uio *uio, int flags) 328 { 329 pad_softc_t *sc; 330 pad_block_t pb; 331 void (*intr)(void *); 332 void *intrarg; 333 int err; 334 335 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 336 if (sc == NULL) 337 return ENXIO; 338 339 err = 0; 340 341 intr = sc->sc_intr; 342 intrarg = sc->sc_intrarg; 343 344 while (uio->uio_resid > 0 && !err) { 345 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 346 if (!err) 347 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 348 else { 349 if (intr) { 350 (*intr)(intrarg); 351 intr = sc->sc_intr; 352 intrarg = sc->sc_intrarg; 353 err = 0; 354 continue; 355 } 356 357 mutex_enter(&sc->sc_mutex); 358 err = cv_timedwait_sig(&sc->sc_condvar, &sc->sc_mutex, 359 hz/100); 360 if (err != 0 && err != EWOULDBLOCK) { 361 mutex_exit(&sc->sc_mutex); 362 if (err != ERESTART) 363 aprint_error_dev(sc->sc_dev, 364 "cv_timedwait_sig returned %d\n", 365 err); 366 return EINTR; 367 } 368 intr = sc->sc_intr; 369 intrarg = sc->sc_intrarg; 370 mutex_exit(&sc->sc_mutex); 371 err = 0; 372 } 373 } 374 375 if (intr) 376 (*intr)(intrarg); 377 378 return err; 379 } 380 381 static int 382 pad_query_encoding(void *opaque, struct audio_encoding *ae) 383 { 384 pad_softc_t *sc; 385 386 sc = (pad_softc_t *)opaque; 387 388 return auconv_query_encoding(sc->sc_encodings, ae); 389 } 390 391 static int 392 pad_set_params(void *opaque, int setmode, int usemode, 393 audio_params_t *play, audio_params_t *rec, 394 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 395 { 396 pad_softc_t *sc; 397 398 sc = (pad_softc_t *)opaque; 399 400 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 401 play, true, pfil) < 0) 402 return EINVAL; 403 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 404 rec, true, rfil) < 0) 405 return EINVAL; 406 407 if (pfil->req_size > 0) 408 play = &pfil->filters[0].param; 409 switch (play->encoding) { 410 case AUDIO_ENCODING_SLINEAR_LE: 411 if (play->precision == 16 && play->validbits == 16) 412 pfil->prepend(pfil, pad_vol_slinear16_le, play); 413 break; 414 case AUDIO_ENCODING_SLINEAR_BE: 415 if (play->precision == 16 && play->validbits == 16) 416 pfil->prepend(pfil, pad_vol_slinear16_be, play); 417 break; 418 default: 419 break; 420 } 421 422 return 0; 423 } 424 425 static int 426 pad_start_output(void *opaque, void *block, int blksize, 427 void (*intr)(void *), void *intrarg) 428 { 429 pad_softc_t *sc; 430 int err; 431 432 sc = (pad_softc_t *)opaque; 433 434 mutex_enter(&sc->sc_mutex); 435 436 sc->sc_intr = intr; 437 sc->sc_intrarg = intrarg; 438 sc->sc_blksize = blksize; 439 440 err = pad_add_block(sc, block, blksize); 441 442 cv_signal(&sc->sc_condvar); 443 444 mutex_exit(&sc->sc_mutex); 445 446 return err; 447 } 448 449 static int 450 pad_start_input(void *opaque, void *block, int blksize, 451 void (*intr)(void *), void *intrarg) 452 { 453 return EINVAL; 454 } 455 456 static int 457 pad_halt_output(void *opaque) 458 { 459 pad_softc_t *sc; 460 461 sc = (pad_softc_t *)opaque; 462 sc->sc_intr = NULL; 463 sc->sc_intrarg = NULL; 464 sc->sc_buflen = 0; 465 sc->sc_rpos = sc->sc_wpos = 0; 466 467 return 0; 468 } 469 470 static int 471 pad_halt_input(void *opaque) 472 { 473 return 0; 474 } 475 476 static int 477 pad_getdev(void *opaque, struct audio_device *ret) 478 { 479 480 *ret = pad_device; 481 482 return 0; 483 } 484 485 static int 486 pad_set_port(void *opaque, mixer_ctrl_t *mc) 487 { 488 pad_softc_t *sc; 489 490 sc = (pad_softc_t *)opaque; 491 492 switch (mc->dev) { 493 case PAD_OUTPUT_MASTER_VOLUME: 494 case PAD_INPUT_DAC_VOLUME: 495 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 496 return 0; 497 } 498 499 return ENXIO; 500 } 501 502 static int 503 pad_get_port(void *opaque, mixer_ctrl_t *mc) 504 { 505 pad_softc_t *sc; 506 507 sc = (pad_softc_t *)opaque; 508 509 switch (mc->dev) { 510 case PAD_OUTPUT_MASTER_VOLUME: 511 case PAD_INPUT_DAC_VOLUME: 512 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 513 return 0; 514 } 515 516 return ENXIO; 517 } 518 519 static int 520 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 521 { 522 pad_softc_t *sc; 523 524 sc = (pad_softc_t *)opaque; 525 526 switch (di->index) { 527 case PAD_OUTPUT_CLASS: 528 di->mixer_class = PAD_OUTPUT_CLASS; 529 strcpy(di->label.name, AudioCoutputs); 530 di->type = AUDIO_MIXER_CLASS; 531 di->next = di->prev = AUDIO_MIXER_LAST; 532 return 0; 533 case PAD_INPUT_CLASS: 534 di->mixer_class = PAD_INPUT_CLASS; 535 strcpy(di->label.name, AudioCinputs); 536 di->type = AUDIO_MIXER_CLASS; 537 di->next = di->prev = AUDIO_MIXER_LAST; 538 return 0; 539 case PAD_OUTPUT_MASTER_VOLUME: 540 di->mixer_class = PAD_OUTPUT_CLASS; 541 strcpy(di->label.name, AudioNmaster); 542 di->type = AUDIO_MIXER_VALUE; 543 di->next = di->prev = AUDIO_MIXER_LAST; 544 di->un.v.num_channels = 1; 545 strcpy(di->un.v.units.name, AudioNvolume); 546 return 0; 547 case PAD_INPUT_DAC_VOLUME: 548 di->mixer_class = PAD_INPUT_CLASS; 549 strcpy(di->label.name, AudioNdac); 550 di->type = AUDIO_MIXER_VALUE; 551 di->next = di->prev = AUDIO_MIXER_LAST; 552 di->un.v.num_channels = 1; 553 strcpy(di->un.v.units.name, AudioNvolume); 554 return 0; 555 } 556 557 return ENXIO; 558 } 559 560 static int 561 pad_get_props(void *opaque) 562 { 563 return 0; 564 } 565 566 static int 567 pad_round_blocksize(void *opaque, int blksize, int mode, 568 const audio_params_t *p) 569 { 570 return PAD_BLKSIZE; 571 } 572 573 #ifdef _MODULE 574 575 MODULE(MODULE_CLASS_DRIVER, pad, NULL); 576 577 static const struct cfiattrdata audiobuscf_iattrdata = { 578 "audiobus", 0, { { NULL, NULL, 0 }, } 579 }; 580 static const struct cfiattrdata * const pad_attrs[] = { 581 &audiobuscf_iattrdata, NULL 582 }; 583 584 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 585 extern struct cfattach pad_ca; 586 static int padloc[] = { -1, -1 }; 587 588 static struct cfdata pad_cfdata[] = { 589 { 590 .cf_name = "pad", 591 .cf_atname = "pad", 592 .cf_unit = 0, 593 .cf_fstate = FSTATE_STAR, 594 .cf_loc = padloc, 595 .cf_flags = 0, 596 .cf_pspec = NULL, 597 }, 598 { NULL, NULL, 0, 0, NULL, 0, NULL } 599 }; 600 601 static int 602 pad_modcmd(modcmd_t cmd, void *arg) 603 { 604 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 605 int error, s; 606 607 switch (cmd) { 608 case MODULE_CMD_INIT: 609 error = config_cfdriver_attach(&pad_cd); 610 if (error) { 611 return error; 612 } 613 614 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 615 if (error) { 616 config_cfdriver_detach(&pad_cd); 617 aprint_error("%s: unable to register cfattach\n", 618 pad_cd.cd_name); 619 620 return error; 621 } 622 623 s = splaudio(); 624 error = config_cfdata_attach(pad_cfdata, 1); 625 splx(s); 626 if (error) { 627 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 628 config_cfdriver_detach(&pad_cd); 629 aprint_error("%s: unable to register cfdata\n", 630 pad_cd.cd_name); 631 632 return error; 633 } 634 635 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, &pad_cdevsw, &cmajor); 636 if (error) { 637 error = config_cfdata_detach(pad_cfdata); 638 if (error) { 639 return error; 640 } 641 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 642 config_cfdriver_detach(&pad_cd); 643 aprint_error("%s: unable to register devsw\n", 644 pad_cd.cd_name); 645 646 return error; 647 } 648 649 (void)config_attach_pseudo(pad_cfdata); 650 651 return 0; 652 case MODULE_CMD_FINI: 653 error = config_cfdata_detach(pad_cfdata); 654 if (error) { 655 return error; 656 } 657 658 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 659 config_cfdriver_detach(&pad_cd); 660 devsw_detach(NULL, &pad_cdevsw); 661 662 return 0; 663 default: 664 return ENOTTY; 665 } 666 } 667 668 #endif 669
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