pad.c revision 1.21.2.1
1 /* $NetBSD: pad.c,v 1.21.2.1 2014/11/23 13:07:04 martin 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 1.21.2.1 2014/11/23 13:07:04 martin 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 #include <dev/auvolconv.h> 51 52 #include <dev/pad/padvar.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 stream_filter_t *pad_swvol_filter_le(struct audio_softc *, 95 const audio_params_t *, const audio_params_t *); 96 static stream_filter_t *pad_swvol_filter_be(struct audio_softc *, 97 const audio_params_t *, const audio_params_t *); 98 static void pad_swvol_dtor(stream_filter_t *); 99 100 static const struct audio_hw_if pad_hw_if = { 101 .query_encoding = pad_query_encoding, 102 .set_params = pad_set_params, 103 .start_output = pad_start_output, 104 .start_input = pad_start_input, 105 .halt_output = pad_halt_output, 106 .halt_input = pad_halt_input, 107 .getdev = pad_getdev, 108 .set_port = pad_set_port, 109 .get_port = pad_get_port, 110 .query_devinfo = pad_query_devinfo, 111 .get_props = pad_get_props, 112 .round_blocksize = pad_round_blocksize, 113 .get_locks = pad_get_locks, 114 }; 115 116 #define PAD_NFORMATS 1 117 static const struct audio_format pad_formats[PAD_NFORMATS] = { 118 { NULL, AUMODE_PLAY|AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16, 119 2, AUFMT_STEREO, 1, { 44100 } }, 120 }; 121 122 extern void padattach(int); 123 124 static int pad_add_block(pad_softc_t *, uint8_t *, int); 125 static int pad_get_block(pad_softc_t *, pad_block_t *, int); 126 127 dev_type_open(pad_open); 128 dev_type_close(pad_close); 129 dev_type_read(pad_read); 130 131 const struct cdevsw pad_cdevsw = { 132 .d_open = pad_open, 133 .d_close = pad_close, 134 .d_read = pad_read, 135 .d_write = nowrite, 136 .d_ioctl = noioctl, 137 .d_stop = nostop, 138 .d_tty = notty, 139 .d_poll = nopoll, 140 .d_mmap = nommap, 141 .d_kqfilter = nokqfilter, 142 .d_discard = nodiscard, 143 .d_flag = D_OTHER | D_MPSAFE, 144 }; 145 146 CFATTACH_DECL2_NEW(pad, sizeof(pad_softc_t), pad_match, pad_attach, pad_detach, 147 NULL, NULL, pad_childdet); 148 149 void 150 padattach(int n) 151 { 152 int i, err; 153 cfdata_t cf; 154 155 aprint_debug("pad: requested %d units\n", n); 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 if (sc->sc_open == 0) 189 return EIO; 190 191 KASSERT(mutex_owned(&sc->sc_lock)); 192 193 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 194 return ENOBUFS; 195 196 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 197 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 198 else { 199 l = PAD_BUFSIZE - sc->sc_wpos; 200 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 201 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 202 } 203 204 sc->sc_wpos += blksize; 205 if (sc->sc_wpos > PAD_BUFSIZE) 206 sc->sc_wpos -= PAD_BUFSIZE; 207 208 sc->sc_buflen += blksize; 209 210 return 0; 211 } 212 213 static int 214 pad_get_block(pad_softc_t *sc, pad_block_t *pb, int blksize) 215 { 216 int l; 217 218 KASSERT(mutex_owned(&sc->sc_lock)); 219 KASSERT(pb != NULL); 220 221 if (sc->sc_buflen < blksize) 222 return ERESTART; 223 224 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 225 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 226 pb->pb_len = blksize; 227 sc->sc_rpos += blksize; 228 } else { 229 l = PAD_BUFSIZE - sc->sc_rpos; 230 pb->pb_len = l; 231 sc->sc_rpos = 0; 232 } 233 sc->sc_buflen -= pb->pb_len; 234 235 return 0; 236 } 237 238 static int 239 pad_match(device_t parent, cfdata_t data, void *opaque) 240 { 241 242 return 1; 243 } 244 245 static void 246 pad_childdet(device_t self, device_t child) 247 { 248 pad_softc_t *sc = device_private(self); 249 250 sc->sc_audiodev = NULL; 251 } 252 253 static void 254 pad_attach(device_t parent, device_t self, void *opaque) 255 { 256 pad_softc_t *sc = device_private(self); 257 258 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 259 260 sc->sc_dev = self; 261 sc->sc_open = 0; 262 if (auconv_create_encodings(pad_formats, PAD_NFORMATS, 263 &sc->sc_encodings) != 0) { 264 aprint_error_dev(self, "couldn't create encodings\n"); 265 return; 266 } 267 268 cv_init(&sc->sc_condvar, device_xname(self)); 269 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 270 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 271 272 sc->sc_swvol = 255; 273 sc->sc_buflen = 0; 274 sc->sc_rpos = sc->sc_wpos = 0; 275 sc->sc_audiodev = (void *)audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 276 277 if (!pmf_device_register(self, NULL, NULL)) 278 aprint_error_dev(self, "couldn't establish power handler\n"); 279 280 return; 281 } 282 283 static int 284 pad_detach(device_t self, int flags) 285 { 286 pad_softc_t *sc = device_private(self); 287 int cmaj, mn, rc; 288 289 cmaj = cdevsw_lookup_major(&pad_cdevsw); 290 mn = device_unit(self); 291 vdevgone(cmaj, mn, mn, VCHR); 292 293 if ((rc = config_detach_children(self, flags)) != 0) 294 return rc; 295 296 pmf_device_deregister(self); 297 298 mutex_destroy(&sc->sc_lock); 299 mutex_destroy(&sc->sc_intr_lock); 300 cv_destroy(&sc->sc_condvar); 301 302 auconv_delete_encodings(sc->sc_encodings); 303 304 return 0; 305 } 306 307 int 308 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 309 { 310 pad_softc_t *sc; 311 312 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 313 if (sc == NULL) 314 return ENXIO; 315 316 if (atomic_swap_uint(&sc->sc_open, 1) != 0) { 317 return EBUSY; 318 } 319 320 return 0; 321 } 322 323 int 324 pad_close(dev_t dev, int flags, int fmt, struct lwp *l) 325 { 326 pad_softc_t *sc; 327 328 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 329 if (sc == NULL) 330 return ENXIO; 331 332 KASSERT(sc->sc_open > 0); 333 sc->sc_open = 0; 334 335 return 0; 336 } 337 338 int 339 pad_read(dev_t dev, struct uio *uio, int flags) 340 { 341 pad_softc_t *sc; 342 pad_block_t pb; 343 void (*intr)(void *); 344 void *intrarg; 345 int err; 346 347 sc = device_lookup_private(&pad_cd, PADUNIT(dev)); 348 if (sc == NULL) 349 return ENXIO; 350 351 err = 0; 352 353 mutex_enter(&sc->sc_lock); 354 intr = sc->sc_intr; 355 intrarg = sc->sc_intrarg; 356 357 while (uio->uio_resid > 0 && !err) { 358 err = pad_get_block(sc, &pb, min(uio->uio_resid, PAD_BLKSIZE)); 359 if (!err) { 360 mutex_exit(&sc->sc_lock); 361 err = uiomove(pb.pb_ptr, pb.pb_len, uio); 362 mutex_enter(&sc->sc_lock); 363 continue; 364 } 365 366 if (intr) { 367 mutex_enter(&sc->sc_intr_lock); 368 (*intr)(intrarg); 369 mutex_exit(&sc->sc_intr_lock); 370 intr = sc->sc_intr; 371 intrarg = sc->sc_intrarg; 372 err = 0; 373 continue; 374 } 375 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_lock); 376 if (err != 0) { 377 mutex_exit(&sc->sc_lock); 378 return err; 379 } 380 intr = sc->sc_intr; 381 intrarg = sc->sc_intrarg; 382 } 383 384 if (intr) { 385 mutex_enter(&sc->sc_intr_lock); 386 (*intr)(intrarg); 387 mutex_exit(&sc->sc_intr_lock); 388 } 389 mutex_exit(&sc->sc_lock); 390 391 return err; 392 } 393 394 static int 395 pad_query_encoding(void *opaque, struct audio_encoding *ae) 396 { 397 pad_softc_t *sc; 398 399 sc = (pad_softc_t *)opaque; 400 401 KASSERT(mutex_owned(&sc->sc_lock)); 402 403 return auconv_query_encoding(sc->sc_encodings, ae); 404 } 405 406 static int 407 pad_set_params(void *opaque, int setmode, int usemode, 408 audio_params_t *play, audio_params_t *rec, 409 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 410 { 411 pad_softc_t *sc __diagused; 412 413 sc = (pad_softc_t *)opaque; 414 415 KASSERT(mutex_owned(&sc->sc_lock)); 416 417 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_PLAY, 418 play, true, pfil) < 0) 419 return EINVAL; 420 if (auconv_set_converter(pad_formats, PAD_NFORMATS, AUMODE_RECORD, 421 rec, true, rfil) < 0) 422 return EINVAL; 423 424 if (pfil->req_size > 0) 425 play = &pfil->filters[0].param; 426 switch (play->encoding) { 427 case AUDIO_ENCODING_SLINEAR_LE: 428 if (play->precision == 16 && play->validbits == 16) 429 pfil->prepend(pfil, pad_swvol_filter_le, play); 430 break; 431 case AUDIO_ENCODING_SLINEAR_BE: 432 if (play->precision == 16 && play->validbits == 16) 433 pfil->prepend(pfil, pad_swvol_filter_be, play); 434 break; 435 default: 436 break; 437 } 438 439 return 0; 440 } 441 442 static int 443 pad_start_output(void *opaque, void *block, int blksize, 444 void (*intr)(void *), void *intrarg) 445 { 446 pad_softc_t *sc; 447 int err; 448 449 sc = (pad_softc_t *)opaque; 450 451 KASSERT(mutex_owned(&sc->sc_lock)); 452 453 sc->sc_intr = intr; 454 sc->sc_intrarg = intrarg; 455 sc->sc_blksize = blksize; 456 457 err = pad_add_block(sc, block, blksize); 458 459 cv_broadcast(&sc->sc_condvar); 460 461 return err; 462 } 463 464 static int 465 pad_start_input(void *opaque, void *block, int blksize, 466 void (*intr)(void *), void *intrarg) 467 { 468 pad_softc_t *sc __diagused; 469 470 sc = (pad_softc_t *)opaque; 471 472 KASSERT(mutex_owned(&sc->sc_lock)); 473 474 return EOPNOTSUPP; 475 } 476 477 static int 478 pad_halt_output(void *opaque) 479 { 480 pad_softc_t *sc; 481 482 sc = (pad_softc_t *)opaque; 483 484 KASSERT(mutex_owned(&sc->sc_lock)); 485 486 sc->sc_intr = NULL; 487 sc->sc_intrarg = NULL; 488 sc->sc_buflen = 0; 489 sc->sc_rpos = sc->sc_wpos = 0; 490 491 return 0; 492 } 493 494 static int 495 pad_halt_input(void *opaque) 496 { 497 pad_softc_t *sc __diagused; 498 499 sc = (pad_softc_t *)opaque; 500 501 KASSERT(mutex_owned(&sc->sc_lock)); 502 503 return 0; 504 } 505 506 static int 507 pad_getdev(void *opaque, struct audio_device *ret) 508 { 509 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 510 strlcpy(ret->version, osrelease, sizeof(ret->version)); 511 strlcpy(ret->config, "pad", sizeof(ret->config)); 512 513 return 0; 514 } 515 516 static int 517 pad_set_port(void *opaque, mixer_ctrl_t *mc) 518 { 519 pad_softc_t *sc; 520 521 sc = (pad_softc_t *)opaque; 522 523 KASSERT(mutex_owned(&sc->sc_lock)); 524 525 switch (mc->dev) { 526 case PAD_OUTPUT_MASTER_VOLUME: 527 case PAD_INPUT_DAC_VOLUME: 528 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 529 return 0; 530 } 531 532 return ENXIO; 533 } 534 535 static int 536 pad_get_port(void *opaque, mixer_ctrl_t *mc) 537 { 538 pad_softc_t *sc; 539 540 sc = (pad_softc_t *)opaque; 541 542 KASSERT(mutex_owned(&sc->sc_lock)); 543 544 switch (mc->dev) { 545 case PAD_OUTPUT_MASTER_VOLUME: 546 case PAD_INPUT_DAC_VOLUME: 547 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 548 return 0; 549 } 550 551 return ENXIO; 552 } 553 554 static int 555 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 556 { 557 pad_softc_t *sc __diagused; 558 559 sc = (pad_softc_t *)opaque; 560 561 KASSERT(mutex_owned(&sc->sc_lock)); 562 563 switch (di->index) { 564 case PAD_OUTPUT_CLASS: 565 di->mixer_class = PAD_OUTPUT_CLASS; 566 strcpy(di->label.name, AudioCoutputs); 567 di->type = AUDIO_MIXER_CLASS; 568 di->next = di->prev = AUDIO_MIXER_LAST; 569 return 0; 570 case PAD_INPUT_CLASS: 571 di->mixer_class = PAD_INPUT_CLASS; 572 strcpy(di->label.name, AudioCinputs); 573 di->type = AUDIO_MIXER_CLASS; 574 di->next = di->prev = AUDIO_MIXER_LAST; 575 return 0; 576 case PAD_OUTPUT_MASTER_VOLUME: 577 di->mixer_class = PAD_OUTPUT_CLASS; 578 strcpy(di->label.name, AudioNmaster); 579 di->type = AUDIO_MIXER_VALUE; 580 di->next = di->prev = AUDIO_MIXER_LAST; 581 di->un.v.num_channels = 1; 582 strcpy(di->un.v.units.name, AudioNvolume); 583 return 0; 584 case PAD_INPUT_DAC_VOLUME: 585 di->mixer_class = PAD_INPUT_CLASS; 586 strcpy(di->label.name, AudioNdac); 587 di->type = AUDIO_MIXER_VALUE; 588 di->next = di->prev = AUDIO_MIXER_LAST; 589 di->un.v.num_channels = 1; 590 strcpy(di->un.v.units.name, AudioNvolume); 591 return 0; 592 } 593 594 return ENXIO; 595 } 596 597 static int 598 pad_get_props(void *opaque) 599 { 600 pad_softc_t *sc __diagused; 601 602 sc = (pad_softc_t *)opaque; 603 604 KASSERT(mutex_owned(&sc->sc_lock)); 605 606 return 0; 607 } 608 609 static int 610 pad_round_blocksize(void *opaque, int blksize, int mode, 611 const audio_params_t *p) 612 { 613 pad_softc_t *sc __diagused; 614 615 sc = (pad_softc_t *)opaque; 616 KASSERT(mutex_owned(&sc->sc_lock)); 617 618 return PAD_BLKSIZE; 619 } 620 621 static void 622 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 623 { 624 pad_softc_t *sc; 625 626 sc = (pad_softc_t *)opaque; 627 628 *intr = &sc->sc_intr_lock; 629 *thread = &sc->sc_lock; 630 } 631 632 static stream_filter_t * 633 pad_swvol_filter_le(struct audio_softc *asc, 634 const audio_params_t *from, const audio_params_t *to) 635 { 636 auvolconv_filter_t *this; 637 device_t dev = audio_get_device(asc); 638 struct pad_softc *sc = device_private(dev); 639 640 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 641 this->base.base.fetch_to = auvolconv_slinear16_le_fetch_to; 642 this->base.dtor = pad_swvol_dtor; 643 this->base.set_fetcher = stream_filter_set_fetcher; 644 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 645 this->vol = &sc->sc_swvol; 646 647 return (stream_filter_t *)this; 648 } 649 650 static stream_filter_t * 651 pad_swvol_filter_be(struct audio_softc *asc, 652 const audio_params_t *from, const audio_params_t *to) 653 { 654 auvolconv_filter_t *this; 655 device_t dev = audio_get_device(asc); 656 struct pad_softc *sc = device_private(dev); 657 658 this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP); 659 this->base.base.fetch_to = auvolconv_slinear16_be_fetch_to; 660 this->base.dtor = pad_swvol_dtor; 661 this->base.set_fetcher = stream_filter_set_fetcher; 662 this->base.set_inputbuffer = stream_filter_set_inputbuffer; 663 this->vol = &sc->sc_swvol; 664 665 return (stream_filter_t *)this; 666 } 667 668 static void 669 pad_swvol_dtor(stream_filter_t *this) 670 { 671 if (this) 672 kmem_free(this, sizeof(auvolconv_filter_t)); 673 } 674 675 #ifdef _MODULE 676 677 MODULE(MODULE_CLASS_DRIVER, pad, NULL); 678 679 static const struct cfiattrdata audiobuscf_iattrdata = { 680 "audiobus", 0, { { NULL, NULL, 0 }, } 681 }; 682 static const struct cfiattrdata * const pad_attrs[] = { 683 &audiobuscf_iattrdata, NULL 684 }; 685 686 CFDRIVER_DECL(pad, DV_DULL, pad_attrs); 687 extern struct cfattach pad_ca; 688 static int padloc[] = { -1, -1 }; 689 690 static struct cfdata pad_cfdata[] = { 691 { 692 .cf_name = "pad", 693 .cf_atname = "pad", 694 .cf_unit = 0, 695 .cf_fstate = FSTATE_STAR, 696 .cf_loc = padloc, 697 .cf_flags = 0, 698 .cf_pspec = NULL, 699 }, 700 { NULL, NULL, 0, 0, NULL, 0, NULL } 701 }; 702 703 static int 704 pad_modcmd(modcmd_t cmd, void *arg) 705 { 706 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 707 int error; 708 709 switch (cmd) { 710 case MODULE_CMD_INIT: 711 error = config_cfdriver_attach(&pad_cd); 712 if (error) { 713 return error; 714 } 715 716 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 717 if (error) { 718 config_cfdriver_detach(&pad_cd); 719 aprint_error("%s: unable to register cfattach\n", 720 pad_cd.cd_name); 721 722 return error; 723 } 724 725 error = config_cfdata_attach(pad_cfdata, 1); 726 if (error) { 727 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 728 config_cfdriver_detach(&pad_cd); 729 aprint_error("%s: unable to register cfdata\n", 730 pad_cd.cd_name); 731 732 return error; 733 } 734 735 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, &pad_cdevsw, &cmajor); 736 if (error) { 737 error = config_cfdata_detach(pad_cfdata); 738 if (error) { 739 return error; 740 } 741 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 742 config_cfdriver_detach(&pad_cd); 743 aprint_error("%s: unable to register devsw\n", 744 pad_cd.cd_name); 745 746 return error; 747 } 748 749 (void)config_attach_pseudo(pad_cfdata); 750 751 return 0; 752 case MODULE_CMD_FINI: 753 error = config_cfdata_detach(pad_cfdata); 754 if (error) { 755 return error; 756 } 757 758 config_cfattach_detach(pad_cd.cd_name, &pad_ca); 759 config_cfdriver_detach(&pad_cd); 760 devsw_detach(NULL, &pad_cdevsw); 761 762 return 0; 763 default: 764 return ENOTTY; 765 } 766 } 767 768 #endif 769
Indexes created Wed Oct 22 06:10:02 GMT 2025