pad.c revision 1.72
1 /* $NetBSD: pad.c,v 1.72 2021/06/14 10:21:21 riastradh 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 1.72 2021/06/14 10:21:21 riastradh Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/types.h> 34 35 #include <sys/audioio.h> 36 #include <sys/buf.h> 37 #include <sys/condvar.h> 38 #include <sys/conf.h> 39 #include <sys/device.h> 40 #include <sys/file.h> 41 #include <sys/filedesc.h> 42 #include <sys/kauth.h> 43 #include <sys/kernel.h> 44 #include <sys/kmem.h> 45 #include <sys/module.h> 46 #include <sys/poll.h> 47 #include <sys/proc.h> 48 #include <sys/select.h> 49 #include <sys/stat.h> 50 #include <sys/vnode.h> 51 52 #include <dev/audio/audio_if.h> 53 #include <dev/audio/audiovar.h> 54 55 #include <dev/pad/padvar.h> 56 57 #include "ioconf.h" 58 59 /* #define PAD_DEBUG */ 60 #ifdef PAD_DEBUG 61 #define DPRINTF(fmt...) printf(fmt) 62 #else 63 #define DPRINTF(fmt...) /**/ 64 #endif 65 66 #define PADFREQ 44100 67 #define PADCHAN 2 68 #define PADPREC 16 69 70 typedef struct pad_block { 71 uint8_t *pb_ptr; 72 int pb_len; 73 } pad_block_t; 74 75 enum { 76 PAD_OUTPUT_CLASS, 77 PAD_INPUT_CLASS, 78 PAD_OUTPUT_MASTER_VOLUME, 79 PAD_INPUT_DAC_VOLUME, 80 PAD_ENUM_LAST, 81 }; 82 83 static int pad_match(device_t, cfdata_t, void *); 84 static void pad_attach(device_t, device_t, void *); 85 static int pad_detach(device_t, int); 86 static void pad_childdet(device_t, device_t); 87 88 static int pad_query_format(void *, audio_format_query_t *); 89 static int pad_set_format(void *, int, 90 const audio_params_t *, const audio_params_t *, 91 audio_filter_reg_t *, audio_filter_reg_t *); 92 static int pad_start_output(void *, void *, int, 93 void (*)(void *), void *); 94 static int pad_halt_output(void *); 95 static int pad_getdev(void *, struct audio_device *); 96 static int pad_set_port(void *, mixer_ctrl_t *); 97 static int pad_get_port(void *, mixer_ctrl_t *); 98 static int pad_query_devinfo(void *, mixer_devinfo_t *); 99 static int pad_get_props(void *); 100 static void pad_get_locks(void *, kmutex_t **, kmutex_t **); 101 102 static void pad_done_output(void *); 103 static void pad_swvol_codec(audio_filter_arg_t *); 104 105 static void pad_close(struct pad_softc *); 106 static int pad_read(struct pad_softc *, off_t *, struct uio *, 107 kauth_cred_t, int); 108 109 static int fops_pad_close(struct file *); 110 static int fops_pad_read(struct file *, off_t *, struct uio *, 111 kauth_cred_t, int); 112 static int fops_pad_write(struct file *, off_t *, struct uio *, 113 kauth_cred_t, int); 114 static int fops_pad_ioctl(struct file *, u_long, void *); 115 static int fops_pad_kqfilter(struct file *, struct knote *); 116 static int fops_pad_poll(struct file *, int); 117 static int fops_pad_stat(struct file *, struct stat *); 118 static int fops_pad_mmap(struct file *, off_t *, size_t, int, int *, int *, 119 struct uvm_object **, int *); 120 121 static const struct audio_hw_if pad_hw_if = { 122 .query_format = pad_query_format, 123 .set_format = pad_set_format, 124 .start_output = pad_start_output, 125 .halt_output = pad_halt_output, 126 .getdev = pad_getdev, 127 .set_port = pad_set_port, 128 .get_port = pad_get_port, 129 .query_devinfo = pad_query_devinfo, 130 .get_props = pad_get_props, 131 .get_locks = pad_get_locks, 132 }; 133 134 #define PAD_NFORMATS 1 135 static const struct audio_format pad_formats[PAD_NFORMATS] = { 136 { 137 .mode = AUMODE_PLAY, 138 .encoding = AUDIO_ENCODING_SLINEAR_LE, 139 .validbits = PADPREC, 140 .precision = PADPREC, 141 .channels = PADCHAN, 142 .channel_mask = AUFMT_STEREO, 143 .frequency_type = 1, 144 .frequency = { PADFREQ }, 145 }, 146 }; 147 148 extern void padattach(int); 149 150 static int pad_add_block(struct pad_softc *, uint8_t *, int); 151 static int pad_get_block(struct pad_softc *, pad_block_t *, int); 152 153 static dev_type_open(pad_open); 154 155 const struct cdevsw pad_cdevsw = { 156 .d_open = pad_open, 157 .d_close = noclose, 158 .d_read = noread, 159 .d_write = nowrite, 160 .d_ioctl = noioctl, 161 .d_stop = nostop, 162 .d_tty = notty, 163 .d_poll = nopoll, 164 .d_mmap = nommap, 165 .d_kqfilter = nokqfilter, 166 .d_discard = nodiscard, 167 .d_flag = D_OTHER | D_MPSAFE, 168 }; 169 170 const struct fileops pad_fileops = { 171 .fo_name = "pad", 172 .fo_read = fops_pad_read, 173 .fo_write = fops_pad_write, 174 .fo_ioctl = fops_pad_ioctl, 175 .fo_fcntl = fnullop_fcntl, 176 .fo_stat = fops_pad_stat, 177 .fo_poll = fops_pad_poll, 178 .fo_close = fops_pad_close, 179 .fo_mmap = fops_pad_mmap, 180 .fo_kqfilter = fops_pad_kqfilter, 181 .fo_restart = fnullop_restart 182 }; 183 184 CFATTACH_DECL2_NEW(pad, sizeof(struct pad_softc), 185 pad_match, pad_attach, pad_detach, 186 NULL, NULL, pad_childdet); 187 188 void 189 padattach(int n) 190 { 191 int error; 192 193 error = config_cfattach_attach(pad_cd.cd_name, &pad_ca); 194 if (error) { 195 aprint_error("%s: couldn't register cfattach: %d\n", 196 pad_cd.cd_name, error); 197 config_cfdriver_detach(&pad_cd); 198 return; 199 } 200 } 201 202 static int 203 pad_match(device_t parent, cfdata_t data, void *opaque) 204 { 205 206 return 1; 207 } 208 209 static void 210 pad_attach(device_t parent, device_t self, void *opaque) 211 { 212 struct pad_softc *sc = device_private(self); 213 214 KASSERT(KERNEL_LOCKED_P()); 215 216 aprint_normal_dev(self, "outputs: 44100Hz, 16-bit, stereo\n"); 217 218 sc->sc_dev = self; 219 220 cv_init(&sc->sc_condvar, device_xname(sc->sc_dev)); 221 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 222 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_SOFTCLOCK); 223 callout_init(&sc->sc_pcallout, CALLOUT_MPSAFE); 224 callout_setfunc(&sc->sc_pcallout, pad_done_output, sc); 225 226 sc->sc_swvol = 255; 227 sc->sc_buflen = 0; 228 sc->sc_rpos = sc->sc_wpos = 0; 229 sc->sc_audiodev = audio_attach_mi(&pad_hw_if, sc, sc->sc_dev); 230 231 if (!pmf_device_register(sc->sc_dev, NULL, NULL)) 232 aprint_error_dev(sc->sc_dev, 233 "couldn't establish power handler\n"); 234 235 sc->sc_open = 1; 236 } 237 238 static int 239 pad_detach(device_t self, int flags) 240 { 241 struct pad_softc *sc = device_private(self); 242 int cmaj, mn; 243 int error; 244 245 KASSERT(KERNEL_LOCKED_P()); 246 247 /* Prevent detach without going through close -- e.g., drvctl. */ 248 if (sc->sc_open) 249 return EBUSY; 250 251 error = config_detach_children(self, flags); 252 if (error) 253 return error; 254 255 cmaj = cdevsw_lookup_major(&pad_cdevsw); 256 mn = device_unit(sc->sc_dev); 257 vdevgone(cmaj, mn, mn, VCHR); 258 259 pmf_device_deregister(sc->sc_dev); 260 261 callout_destroy(&sc->sc_pcallout); 262 mutex_destroy(&sc->sc_lock); 263 mutex_destroy(&sc->sc_intr_lock); 264 cv_destroy(&sc->sc_condvar); 265 266 return 0; 267 } 268 269 static void 270 pad_childdet(device_t self, device_t child) 271 { 272 struct pad_softc *sc = device_private(self); 273 274 if (child == sc->sc_audiodev) 275 sc->sc_audiodev = NULL; 276 } 277 278 static int 279 pad_add_block(struct pad_softc *sc, uint8_t *blk, int blksize) 280 { 281 int l; 282 283 if (sc->sc_buflen + blksize > PAD_BUFSIZE) 284 return ENOBUFS; 285 286 if (sc->sc_wpos + blksize <= PAD_BUFSIZE) 287 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, blksize); 288 else { 289 l = PAD_BUFSIZE - sc->sc_wpos; 290 memcpy(sc->sc_audiobuf + sc->sc_wpos, blk, l); 291 memcpy(sc->sc_audiobuf, blk + l, blksize - l); 292 } 293 294 sc->sc_wpos += blksize; 295 if (sc->sc_wpos >= PAD_BUFSIZE) 296 sc->sc_wpos -= PAD_BUFSIZE; 297 298 sc->sc_buflen += blksize; 299 300 return 0; 301 } 302 303 static int 304 pad_get_block(struct pad_softc *sc, pad_block_t *pb, int blksize) 305 { 306 int l; 307 308 KASSERT(pb != NULL); 309 310 pb->pb_ptr = (sc->sc_audiobuf + sc->sc_rpos); 311 if (sc->sc_rpos + blksize < PAD_BUFSIZE) { 312 pb->pb_len = blksize; 313 sc->sc_rpos += blksize; 314 } else { 315 l = PAD_BUFSIZE - sc->sc_rpos; 316 pb->pb_len = l; 317 sc->sc_rpos = 0; 318 } 319 sc->sc_buflen -= pb->pb_len; 320 321 return 0; 322 } 323 324 static int 325 pad_open(dev_t dev, int flags, int fmt, struct lwp *l) 326 { 327 struct file *fp = NULL; 328 device_t self; 329 struct pad_softc *sc = NULL; 330 cfdata_t cf = NULL; 331 int error, fd; 332 333 error = fd_allocfile(&fp, &fd); 334 if (error) 335 goto out; 336 337 cf = kmem_alloc(sizeof(*cf), KM_SLEEP); 338 cf->cf_name = pad_cd.cd_name; 339 cf->cf_atname = pad_cd.cd_name; 340 cf->cf_unit = 0; 341 cf->cf_fstate = FSTATE_STAR; 342 343 self = config_attach_pseudo(cf); 344 if (self == NULL) { 345 error = ENXIO; 346 goto out; 347 } 348 sc = device_private(self); 349 KASSERT(sc->sc_dev == self); 350 cf = NULL; 351 352 error = fd_clone(fp, fd, flags, &pad_fileops, sc); 353 KASSERT(error == EMOVEFD); 354 fp = NULL; 355 sc = NULL; 356 357 out: if (sc) 358 pad_close(sc); 359 if (cf) 360 kmem_free(cf, sizeof(*cf)); 361 if (fp) 362 fd_abort(curproc, fp, fd); 363 return error; 364 } 365 366 static void 367 pad_close(struct pad_softc *sc) 368 { 369 device_t self = sc->sc_dev; 370 cfdata_t cf = device_cfdata(self); 371 372 KERNEL_LOCK(1, NULL); 373 KASSERT(sc->sc_open); 374 sc->sc_open = 0; 375 (void)config_detach(self, DETACH_FORCE); 376 KERNEL_UNLOCK_ONE(NULL); 377 378 kmem_free(cf, sizeof(*cf)); 379 } 380 381 static int 382 fops_pad_close(struct file *fp) 383 { 384 struct pad_softc *sc = fp->f_pad; 385 386 pad_close(sc); 387 388 return 0; 389 } 390 391 static int 392 fops_pad_poll(struct file *fp, int events) 393 { 394 395 return POLLERR; 396 } 397 398 static int 399 fops_pad_kqfilter(struct file *fp, struct knote *kn) 400 { 401 struct pad_softc *sc = fp->f_pad; 402 dev_t dev; 403 404 dev = makedev(cdevsw_lookup_major(&pad_cdevsw), 405 device_unit(sc->sc_dev)); 406 407 return seltrue_kqfilter(dev, kn); 408 } 409 410 static int 411 fops_pad_ioctl(struct file *fp, u_long cmd, void *data) 412 { 413 414 return ENODEV; 415 } 416 417 static int 418 fops_pad_stat(struct file *fp, struct stat *st) 419 { 420 struct pad_softc *sc = fp->f_pad; 421 422 memset(st, 0, sizeof(*st)); 423 424 st->st_dev = makedev(cdevsw_lookup_major(&pad_cdevsw), 425 device_unit(sc->sc_dev)); 426 427 st->st_uid = kauth_cred_geteuid(fp->f_cred); 428 st->st_gid = kauth_cred_getegid(fp->f_cred); 429 st->st_mode = S_IFCHR; 430 431 return 0; 432 } 433 434 static int 435 fops_pad_mmap(struct file *fp, off_t *offp, size_t len, int prot, int *flagsp, 436 int *advicep, struct uvm_object **uobjp, int *maxprotp) 437 { 438 439 return 1; 440 } 441 442 static int 443 fops_pad_read(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 444 int ioflag) 445 { 446 struct pad_softc *sc = fp->f_pad; 447 448 return pad_read(sc, offp, uio, cred, ioflag); 449 } 450 451 static int 452 pad_read(struct pad_softc *sc, off_t *offp, struct uio *uio, kauth_cred_t cred, 453 int ioflag) 454 { 455 pad_block_t pb; 456 int len; 457 int err; 458 459 err = 0; 460 DPRINTF("%s: resid=%zu\n", __func__, uio->uio_resid); 461 while (uio->uio_resid > 0 && !err) { 462 mutex_enter(&sc->sc_intr_lock); 463 if (sc->sc_buflen == 0) { 464 DPRINTF("%s: wait\n", __func__); 465 err = cv_wait_sig(&sc->sc_condvar, &sc->sc_intr_lock); 466 DPRINTF("%s: wake up %d\n", __func__, err); 467 mutex_exit(&sc->sc_intr_lock); 468 if (err) { 469 if (err == ERESTART) 470 err = EINTR; 471 break; 472 } 473 if (sc->sc_buflen == 0) 474 break; 475 continue; 476 } 477 478 len = uimin(uio->uio_resid, sc->sc_buflen); 479 err = pad_get_block(sc, &pb, len); 480 mutex_exit(&sc->sc_intr_lock); 481 if (err) 482 break; 483 DPRINTF("%s: move %d\n", __func__, pb.pb_len); 484 uiomove(pb.pb_ptr, pb.pb_len, uio); 485 } 486 487 return err; 488 } 489 490 static int 491 fops_pad_write(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 492 int ioflag) 493 { 494 495 return EOPNOTSUPP; 496 } 497 498 static int 499 pad_query_format(void *opaque, audio_format_query_t *afp) 500 { 501 502 return audio_query_format(pad_formats, PAD_NFORMATS, afp); 503 } 504 505 static int 506 pad_set_format(void *opaque, int setmode, 507 const audio_params_t *play, const audio_params_t *rec, 508 audio_filter_reg_t *pfil, audio_filter_reg_t *rfil) 509 { 510 struct pad_softc *sc = opaque; 511 512 KASSERT(mutex_owned(&sc->sc_lock)); 513 514 /* XXX playback only */ 515 pfil->codec = pad_swvol_codec; 516 pfil->context = sc; 517 518 return 0; 519 } 520 521 static int 522 pad_start_output(void *opaque, void *block, int blksize, 523 void (*intr)(void *), void *intrarg) 524 { 525 struct pad_softc *sc = opaque; 526 int err; 527 int ms; 528 529 KASSERT(mutex_owned(&sc->sc_intr_lock)); 530 531 sc->sc_intr = intr; 532 sc->sc_intrarg = intrarg; 533 sc->sc_blksize = blksize; 534 535 DPRINTF("%s: blksize=%d\n", __func__, blksize); 536 err = pad_add_block(sc, block, blksize); 537 cv_broadcast(&sc->sc_condvar); 538 539 ms = blksize * 1000 / PADCHAN / (PADPREC / NBBY) / PADFREQ; 540 DPRINTF("%s: callout ms=%d\n", __func__, ms); 541 callout_schedule(&sc->sc_pcallout, mstohz(ms)); 542 543 return err; 544 } 545 546 static int 547 pad_halt_output(void *opaque) 548 { 549 struct pad_softc *sc = opaque; 550 551 DPRINTF("%s\n", __func__); 552 KASSERT(mutex_owned(&sc->sc_intr_lock)); 553 554 callout_halt(&sc->sc_pcallout, &sc->sc_intr_lock); 555 556 sc->sc_intr = NULL; 557 sc->sc_intrarg = NULL; 558 sc->sc_buflen = 0; 559 sc->sc_rpos = sc->sc_wpos = 0; 560 cv_broadcast(&sc->sc_condvar); 561 562 return 0; 563 } 564 565 static void 566 pad_done_output(void *arg) 567 { 568 struct pad_softc *sc = arg; 569 570 DPRINTF("%s\n", __func__); 571 572 mutex_enter(&sc->sc_intr_lock); 573 (*sc->sc_intr)(sc->sc_intrarg); 574 mutex_exit(&sc->sc_intr_lock); 575 } 576 577 static int 578 pad_getdev(void *opaque, struct audio_device *ret) 579 { 580 581 strlcpy(ret->name, "Virtual Audio", sizeof(ret->name)); 582 strlcpy(ret->version, osrelease, sizeof(ret->version)); 583 strlcpy(ret->config, "pad", sizeof(ret->config)); 584 585 return 0; 586 } 587 588 static int 589 pad_set_port(void *opaque, mixer_ctrl_t *mc) 590 { 591 struct pad_softc *sc = opaque; 592 593 KASSERT(mutex_owned(&sc->sc_lock)); 594 595 switch (mc->dev) { 596 case PAD_OUTPUT_MASTER_VOLUME: 597 case PAD_INPUT_DAC_VOLUME: 598 if (mc->un.value.num_channels != 1) 599 return EINVAL; 600 sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 601 return 0; 602 } 603 604 return ENXIO; 605 } 606 607 static int 608 pad_get_port(void *opaque, mixer_ctrl_t *mc) 609 { 610 struct pad_softc *sc = opaque; 611 612 KASSERT(mutex_owned(&sc->sc_lock)); 613 614 switch (mc->dev) { 615 case PAD_OUTPUT_MASTER_VOLUME: 616 case PAD_INPUT_DAC_VOLUME: 617 if (mc->un.value.num_channels != 1) 618 return EINVAL; 619 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_swvol; 620 return 0; 621 } 622 623 return ENXIO; 624 } 625 626 static int 627 pad_query_devinfo(void *opaque, mixer_devinfo_t *di) 628 { 629 struct pad_softc *sc __diagused = opaque; 630 631 KASSERT(mutex_owned(&sc->sc_lock)); 632 633 switch (di->index) { 634 case PAD_OUTPUT_CLASS: 635 di->mixer_class = PAD_OUTPUT_CLASS; 636 strcpy(di->label.name, AudioCoutputs); 637 di->type = AUDIO_MIXER_CLASS; 638 di->next = di->prev = AUDIO_MIXER_LAST; 639 return 0; 640 case PAD_INPUT_CLASS: 641 di->mixer_class = PAD_INPUT_CLASS; 642 strcpy(di->label.name, AudioCinputs); 643 di->type = AUDIO_MIXER_CLASS; 644 di->next = di->prev = AUDIO_MIXER_LAST; 645 return 0; 646 case PAD_OUTPUT_MASTER_VOLUME: 647 di->mixer_class = PAD_OUTPUT_CLASS; 648 strcpy(di->label.name, AudioNmaster); 649 di->type = AUDIO_MIXER_VALUE; 650 di->next = di->prev = AUDIO_MIXER_LAST; 651 di->un.v.num_channels = 1; 652 strcpy(di->un.v.units.name, AudioNvolume); 653 return 0; 654 case PAD_INPUT_DAC_VOLUME: 655 di->mixer_class = PAD_INPUT_CLASS; 656 strcpy(di->label.name, AudioNdac); 657 di->type = AUDIO_MIXER_VALUE; 658 di->next = di->prev = AUDIO_MIXER_LAST; 659 di->un.v.num_channels = 1; 660 strcpy(di->un.v.units.name, AudioNvolume); 661 return 0; 662 } 663 664 return ENXIO; 665 } 666 667 static int 668 pad_get_props(void *opaque) 669 { 670 671 return AUDIO_PROP_PLAYBACK; 672 } 673 674 static void 675 pad_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 676 { 677 struct pad_softc *sc = opaque; 678 679 *intr = &sc->sc_intr_lock; 680 *thread = &sc->sc_lock; 681 } 682 683 static void 684 pad_swvol_codec(audio_filter_arg_t *arg) 685 { 686 struct pad_softc *sc = arg->context; 687 const aint_t *src; 688 aint_t *dst; 689 u_int sample_count; 690 u_int i; 691 692 src = arg->src; 693 dst = arg->dst; 694 sample_count = arg->count * arg->srcfmt->channels; 695 for (i = 0; i < sample_count; i++) { 696 aint2_t v = (aint2_t)(*src++); 697 v = v * sc->sc_swvol / 255; 698 *dst++ = (aint_t)v; 699 } 700 } 701 702 MODULE(MODULE_CLASS_DRIVER, pad, "audio"); 703 704 #ifdef _MODULE 705 706 #include "ioconf.c" 707 708 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 709 710 /* 711 * We need our own version of cfattach since config(1)'s ioconf does not 712 * generate what we need 713 */ 714 715 static struct cfattach *pad_cfattachinit[] = { &pad_ca, NULL }; 716 717 static struct cfattachinit pad_cfattach[] = { 718 { "pad", pad_cfattachinit }, 719 { NULL, NULL } 720 }; 721 #endif 722 723 static int 724 pad_modcmd(modcmd_t cmd, void *arg) 725 { 726 int error = 0; 727 728 switch (cmd) { 729 case MODULE_CMD_INIT: 730 #ifdef _MODULE 731 pad_cfattach[1] = cfattach_ioconf_pad[0]; 732 error = config_init_component(cfdriver_ioconf_pad, 733 pad_cfattach, cfdata_ioconf_pad); 734 if (error) 735 break; 736 737 error = devsw_attach(pad_cd.cd_name, NULL, &bmajor, 738 &pad_cdevsw, &cmajor); 739 if (error) { 740 config_fini_component(cfdriver_ioconf_pad, 741 pad_cfattach, cfdata_ioconf_pad); 742 break; 743 } 744 745 #endif 746 break; 747 748 case MODULE_CMD_FINI: 749 #ifdef _MODULE 750 error = devsw_detach(NULL, &pad_cdevsw); 751 if (error) 752 break; 753 754 error = config_fini_component(cfdriver_ioconf_pad, 755 pad_cfattach, cfdata_ioconf_pad); 756 if (error) { 757 devsw_attach(pad_cd.cd_name, NULL, &bmajor, 758 &pad_cdevsw, &cmajor); 759 break; 760 } 761 #endif 762 break; 763 764 default: 765 error = ENOTTY; 766 } 767 768 return error; 769 } 770
Indexes created Thu Oct 02 10:09:58 GMT 2025