uhid.c revision 1.118
1 /* $NetBSD: uhid.c,v 1.118 2021/09/26 01:16:09 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2004, 2008, 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart (at) augustsson.net) at 9 * Carlstedt Research & Technology and Matthew R. Green (mrg (at) eterna.com.au). 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * HID spec: http://www.usb.org/developers/devclass_docs/HID1_11.pdf 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: uhid.c,v 1.118 2021/09/26 01:16:09 thorpej Exp $"); 39 40 #ifdef _KERNEL_OPT 41 #include "opt_compat_netbsd.h" 42 #include "opt_usb.h" 43 #endif 44 45 #include <sys/param.h> 46 #include <sys/types.h> 47 48 #include <sys/atomic.h> 49 #include <sys/compat_stub.h> 50 #include <sys/conf.h> 51 #include <sys/device.h> 52 #include <sys/file.h> 53 #include <sys/intr.h> 54 #include <sys/ioctl.h> 55 #include <sys/kernel.h> 56 #include <sys/kmem.h> 57 #include <sys/poll.h> 58 #include <sys/proc.h> 59 #include <sys/select.h> 60 #include <sys/signalvar.h> 61 #include <sys/systm.h> 62 #include <sys/tty.h> 63 #include <sys/vnode.h> 64 65 #include <dev/usb/usb.h> 66 #include <dev/usb/usbhid.h> 67 68 #include <dev/usb/usbdevs.h> 69 #include <dev/usb/usbdi.h> 70 #include <dev/usb/usbdi_util.h> 71 #include <dev/usb/usb_quirks.h> 72 #include <dev/hid/hid.h> 73 74 #include <dev/usb/uhidev.h> 75 76 #include "ioconf.h" 77 78 #ifdef UHID_DEBUG 79 #define DPRINTF(x) if (uhiddebug) printf x 80 #define DPRINTFN(n,x) if (uhiddebug>(n)) printf x 81 int uhiddebug = 0; 82 #else 83 #define DPRINTF(x) 84 #define DPRINTFN(n,x) 85 #endif 86 87 struct uhid_softc { 88 struct uhidev sc_hdev; 89 90 kmutex_t sc_lock; 91 kcondvar_t sc_cv; 92 kcondvar_t sc_detach_cv; 93 94 int sc_isize; 95 int sc_osize; 96 int sc_fsize; 97 98 u_char *sc_obuf; 99 100 struct clist sc_q; /* protected by sc_lock */ 101 struct selinfo sc_rsel; 102 proc_t *sc_async; /* process that wants SIGIO */ 103 void *sc_sih; 104 volatile uint32_t sc_state; /* driver state */ 105 #define UHID_IMMED 0x02 /* return read data immediately */ 106 107 int sc_refcnt; 108 int sc_raw; 109 u_char sc_open; 110 u_char sc_dying; 111 }; 112 113 #define UHIDUNIT(dev) (minor(dev)) 114 #define UHID_CHUNK 128 /* chunk size for read */ 115 #define UHID_BSIZE 1020 /* buffer size */ 116 117 static dev_type_open(uhidopen); 118 static dev_type_close(uhidclose); 119 static dev_type_read(uhidread); 120 static dev_type_write(uhidwrite); 121 static dev_type_ioctl(uhidioctl); 122 static dev_type_poll(uhidpoll); 123 static dev_type_kqfilter(uhidkqfilter); 124 125 const struct cdevsw uhid_cdevsw = { 126 .d_open = uhidopen, 127 .d_close = uhidclose, 128 .d_read = uhidread, 129 .d_write = uhidwrite, 130 .d_ioctl = uhidioctl, 131 .d_stop = nostop, 132 .d_tty = notty, 133 .d_poll = uhidpoll, 134 .d_mmap = nommap, 135 .d_kqfilter = uhidkqfilter, 136 .d_discard = nodiscard, 137 .d_flag = D_OTHER 138 }; 139 140 Static void uhid_intr(struct uhidev *, void *, u_int); 141 142 Static int uhid_do_read(struct uhid_softc *, struct uio *, int); 143 Static int uhid_do_write(struct uhid_softc *, struct uio *, int); 144 Static int uhid_do_ioctl(struct uhid_softc*, u_long, void *, int, struct lwp *); 145 146 static int uhid_match(device_t, cfdata_t, void *); 147 static void uhid_attach(device_t, device_t, void *); 148 static int uhid_detach(device_t, int); 149 static int uhid_activate(device_t, enum devact); 150 151 CFATTACH_DECL_NEW(uhid, sizeof(struct uhid_softc), uhid_match, uhid_attach, 152 uhid_detach, uhid_activate); 153 154 static int 155 uhid_match(device_t parent, cfdata_t match, void *aux) 156 { 157 #ifdef UHID_DEBUG 158 struct uhidev_attach_arg *uha = aux; 159 #endif 160 161 DPRINTF(("uhid_match: report=%d\n", uha->reportid)); 162 163 if (match->cf_flags & 1) 164 return UMATCH_HIGHEST; 165 else 166 return UMATCH_IFACECLASS_GENERIC; 167 } 168 169 static void 170 uhid_attach(device_t parent, device_t self, void *aux) 171 { 172 struct uhid_softc *sc = device_private(self); 173 struct uhidev_attach_arg *uha = aux; 174 int size, repid; 175 void *desc; 176 177 sc->sc_hdev.sc_dev = self; 178 selinit(&sc->sc_rsel); 179 sc->sc_hdev.sc_intr = uhid_intr; 180 sc->sc_hdev.sc_parent = uha->parent; 181 sc->sc_hdev.sc_report_id = uha->reportid; 182 183 uhidev_get_report_desc(uha->parent, &desc, &size); 184 repid = uha->reportid; 185 sc->sc_isize = hid_report_size(desc, size, hid_input, repid); 186 sc->sc_osize = hid_report_size(desc, size, hid_output, repid); 187 sc->sc_fsize = hid_report_size(desc, size, hid_feature, repid); 188 sc->sc_raw = hid_is_collection(desc, size, uha->reportid, 189 HID_USAGE2(HUP_FIDO, HUF_U2FHID)); 190 191 aprint_naive("\n"); 192 aprint_normal(": input=%d, output=%d, feature=%d\n", 193 sc->sc_isize, sc->sc_osize, sc->sc_fsize); 194 195 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_SOFTUSB); 196 cv_init(&sc->sc_cv, "uhidrea"); 197 cv_init(&sc->sc_detach_cv, "uhiddet"); 198 199 if (!pmf_device_register(self, NULL, NULL)) 200 aprint_error_dev(self, "couldn't establish power handler\n"); 201 202 return; 203 } 204 205 static int 206 uhid_activate(device_t self, enum devact act) 207 { 208 struct uhid_softc *sc = device_private(self); 209 210 switch (act) { 211 case DVACT_DEACTIVATE: 212 sc->sc_dying = 1; 213 return 0; 214 default: 215 return EOPNOTSUPP; 216 } 217 } 218 219 static int 220 uhid_detach(device_t self, int flags) 221 { 222 struct uhid_softc *sc = device_private(self); 223 int maj, mn; 224 225 DPRINTF(("uhid_detach: sc=%p flags=%d\n", sc, flags)); 226 227 /* Prevent new I/O operations, and interrupt any pending reads. */ 228 mutex_enter(&sc->sc_lock); 229 sc->sc_dying = 1; 230 cv_broadcast(&sc->sc_cv); 231 mutex_exit(&sc->sc_lock); 232 233 /* Interrupt any pending uhidev_write. */ 234 uhidev_stop(&sc->sc_hdev); 235 236 /* Wait for I/O operations to complete. */ 237 mutex_enter(&sc->sc_lock); 238 while (sc->sc_refcnt) { 239 DPRINTF(("%s: open=%d refcnt=%d\n", __func__, 240 sc->sc_open, sc->sc_refcnt)); 241 cv_wait(&sc->sc_detach_cv, &sc->sc_lock); 242 } 243 mutex_exit(&sc->sc_lock); 244 245 pmf_device_deregister(self); 246 247 /* locate the major number */ 248 maj = cdevsw_lookup_major(&uhid_cdevsw); 249 250 /* Nuke the vnodes for any open instances (calls close). */ 251 mn = device_unit(self); 252 vdevgone(maj, mn, mn, VCHR); 253 254 /* 255 * Wait for close to finish. 256 * 257 * XXX I assumed that vdevgone would synchronously call close, 258 * and not return before it has completed, but empirically the 259 * assertion of sc->sc_open == 0 below fires if we don't wait 260 * here. Someone^TM should carefully examine vdevgone to 261 * ascertain what it guarantees, and audit all other users of 262 * it accordingly. 263 */ 264 mutex_enter(&sc->sc_lock); 265 while (sc->sc_open) { 266 DPRINTF(("%s: open=%d\n", __func__, sc->sc_open)); 267 cv_wait(&sc->sc_detach_cv, &sc->sc_lock); 268 } 269 mutex_exit(&sc->sc_lock); 270 271 KASSERT(sc->sc_open == 0); 272 KASSERT(sc->sc_refcnt == 0); 273 274 cv_destroy(&sc->sc_cv); 275 cv_destroy(&sc->sc_detach_cv); 276 mutex_destroy(&sc->sc_lock); 277 seldestroy(&sc->sc_rsel); 278 279 return 0; 280 } 281 282 void 283 uhid_intr(struct uhidev *addr, void *data, u_int len) 284 { 285 struct uhid_softc *sc = (struct uhid_softc *)addr; 286 287 #ifdef UHID_DEBUG 288 if (uhiddebug > 5) { 289 uint32_t i; 290 291 DPRINTF(("uhid_intr: data =")); 292 for (i = 0; i < len; i++) 293 DPRINTF((" %02x", ((u_char *)data)[i])); 294 DPRINTF(("\n")); 295 } 296 #endif 297 298 mutex_enter(&sc->sc_lock); 299 (void)b_to_q(data, len, &sc->sc_q); 300 301 DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q)); 302 cv_broadcast(&sc->sc_cv); 303 selnotify(&sc->sc_rsel, 0, NOTE_SUBMIT); 304 if (atomic_load_relaxed(&sc->sc_async) != NULL) { 305 mutex_enter(&proc_lock); 306 if (sc->sc_async != NULL) { 307 DPRINTFN(3, ("uhid_intr: sending SIGIO to %jd\n", 308 (intmax_t)sc->sc_async->p_pid)); 309 psignal(sc->sc_async, SIGIO); 310 } 311 mutex_exit(&proc_lock); 312 } 313 mutex_exit(&sc->sc_lock); 314 } 315 316 static int 317 uhidopen(dev_t dev, int flag, int mode, struct lwp *l) 318 { 319 struct uhid_softc *sc; 320 int error; 321 322 sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); 323 if (sc == NULL) 324 return ENXIO; 325 326 DPRINTF(("uhidopen: sc=%p\n", sc)); 327 328 /* 329 * Try to open. If dying, or if already open (or opening), 330 * fail -- opens are exclusive. 331 */ 332 mutex_enter(&sc->sc_lock); 333 if (sc->sc_dying) { 334 mutex_exit(&sc->sc_lock); 335 return ENXIO; 336 } 337 if (sc->sc_open) { 338 mutex_exit(&sc->sc_lock); 339 return EBUSY; 340 } 341 sc->sc_open = 1; 342 atomic_store_relaxed(&sc->sc_state, 0); 343 mutex_exit(&sc->sc_lock); 344 345 /* uhid interrupts aren't enabled yet, so setup sc_q now */ 346 if (clalloc(&sc->sc_q, UHID_BSIZE, 0) == -1) { 347 error = ENOMEM; 348 goto fail0; 349 } 350 351 /* Allocate an output buffer if needed. */ 352 if (sc->sc_osize > 0) 353 sc->sc_obuf = kmem_alloc(sc->sc_osize, KM_SLEEP); 354 else 355 sc->sc_obuf = NULL; 356 357 /* Paranoia: reset SIGIO before enabling interrputs. */ 358 mutex_enter(&proc_lock); 359 atomic_store_relaxed(&sc->sc_async, NULL); 360 mutex_exit(&proc_lock); 361 362 /* Open the uhidev -- after this point we can get interrupts. */ 363 error = uhidev_open(&sc->sc_hdev); 364 if (error) 365 goto fail1; 366 367 /* We are open for business. */ 368 mutex_enter(&sc->sc_lock); 369 sc->sc_open = 2; 370 mutex_exit(&sc->sc_lock); 371 372 return 0; 373 374 fail2: __unused 375 mutex_enter(&sc->sc_lock); 376 KASSERT(sc->sc_open == 2); 377 sc->sc_open = 1; 378 mutex_exit(&sc->sc_lock); 379 uhidev_close(&sc->sc_hdev); 380 fail1: selnotify(&sc->sc_rsel, POLLHUP, 0); 381 mutex_enter(&proc_lock); 382 atomic_store_relaxed(&sc->sc_async, NULL); 383 mutex_exit(&proc_lock); 384 if (sc->sc_osize > 0) { 385 kmem_free(sc->sc_obuf, sc->sc_osize); 386 sc->sc_obuf = NULL; 387 } 388 clfree(&sc->sc_q); 389 fail0: mutex_enter(&sc->sc_lock); 390 KASSERT(sc->sc_open == 1); 391 sc->sc_open = 0; 392 cv_broadcast(&sc->sc_detach_cv); 393 atomic_store_relaxed(&sc->sc_state, 0); 394 mutex_exit(&sc->sc_lock); 395 return error; 396 } 397 398 static int 399 uhidclose(dev_t dev, int flag, int mode, struct lwp *l) 400 { 401 struct uhid_softc *sc; 402 403 sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); 404 405 DPRINTF(("uhidclose: sc=%p\n", sc)); 406 407 /* We are closing up shop. Prevent new opens until we're done. */ 408 mutex_enter(&sc->sc_lock); 409 KASSERT(sc->sc_open == 2); 410 sc->sc_open = 1; 411 mutex_exit(&sc->sc_lock); 412 413 /* Prevent further interrupts. */ 414 uhidev_close(&sc->sc_hdev); 415 416 /* Hang up all select/poll. */ 417 selnotify(&sc->sc_rsel, POLLHUP, 0); 418 419 /* Reset SIGIO. */ 420 mutex_enter(&proc_lock); 421 atomic_store_relaxed(&sc->sc_async, NULL); 422 mutex_exit(&proc_lock); 423 424 /* Free the buffer and queue. */ 425 if (sc->sc_osize > 0) { 426 kmem_free(sc->sc_obuf, sc->sc_osize); 427 sc->sc_obuf = NULL; 428 } 429 clfree(&sc->sc_q); 430 431 /* All set. We are now closed. */ 432 mutex_enter(&sc->sc_lock); 433 KASSERT(sc->sc_open == 1); 434 sc->sc_open = 0; 435 cv_broadcast(&sc->sc_detach_cv); 436 atomic_store_relaxed(&sc->sc_state, 0); 437 mutex_exit(&sc->sc_lock); 438 439 return 0; 440 } 441 442 static int 443 uhid_enter(dev_t dev, struct uhid_softc **scp) 444 { 445 struct uhid_softc *sc; 446 int error; 447 448 /* XXX need to hold reference to device */ 449 sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); 450 if (sc == NULL) 451 return ENXIO; 452 453 mutex_enter(&sc->sc_lock); 454 KASSERT(sc->sc_open == 2); 455 if (sc->sc_dying) { 456 error = ENXIO; 457 } else if (sc->sc_refcnt == INT_MAX) { 458 error = EBUSY; 459 } else { 460 *scp = sc; 461 sc->sc_refcnt++; 462 error = 0; 463 } 464 mutex_exit(&sc->sc_lock); 465 466 return error; 467 } 468 469 static void 470 uhid_exit(struct uhid_softc *sc) 471 { 472 473 mutex_enter(&sc->sc_lock); 474 KASSERT(sc->sc_open == 2); 475 KASSERT(sc->sc_refcnt > 0); 476 if (--sc->sc_refcnt == 0) 477 cv_broadcast(&sc->sc_detach_cv); 478 mutex_exit(&sc->sc_lock); 479 } 480 481 Static int 482 uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag) 483 { 484 int error = 0; 485 int extra; 486 size_t length; 487 u_char buffer[UHID_CHUNK]; 488 usbd_status err; 489 490 DPRINTFN(1, ("uhidread\n")); 491 if (atomic_load_relaxed(&sc->sc_state) & UHID_IMMED) { 492 DPRINTFN(1, ("uhidread immed\n")); 493 extra = sc->sc_hdev.sc_report_id != 0; 494 if (sc->sc_isize + extra > sizeof(buffer)) 495 return ENOBUFS; 496 err = uhidev_get_report(&sc->sc_hdev, UHID_INPUT_REPORT, 497 buffer, sc->sc_isize + extra); 498 if (err) 499 return EIO; 500 return uiomove(buffer+extra, sc->sc_isize, uio); 501 } 502 503 mutex_enter(&sc->sc_lock); 504 while (sc->sc_q.c_cc == 0) { 505 if (flag & IO_NDELAY) { 506 mutex_exit(&sc->sc_lock); 507 return EWOULDBLOCK; 508 } 509 if (sc->sc_dying) { 510 mutex_exit(&sc->sc_lock); 511 return EIO; 512 } 513 DPRINTFN(5, ("uhidread: sleep on %p\n", &sc->sc_q)); 514 error = cv_wait_sig(&sc->sc_cv, &sc->sc_lock); 515 DPRINTFN(5, ("uhidread: woke, error=%d\n", error)); 516 if (error) { 517 break; 518 } 519 } 520 521 /* Transfer as many chunks as possible. */ 522 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) { 523 length = uimin(sc->sc_q.c_cc, uio->uio_resid); 524 if (length > sizeof(buffer)) 525 length = sizeof(buffer); 526 527 /* Remove a small chunk from the input queue. */ 528 (void) q_to_b(&sc->sc_q, buffer, length); 529 DPRINTFN(5, ("uhidread: got %lu chars\n", (u_long)length)); 530 531 /* Copy the data to the user process. */ 532 mutex_exit(&sc->sc_lock); 533 if ((error = uiomove(buffer, length, uio)) != 0) 534 return error; 535 mutex_enter(&sc->sc_lock); 536 } 537 538 mutex_exit(&sc->sc_lock); 539 return error; 540 } 541 542 static int 543 uhidread(dev_t dev, struct uio *uio, int flag) 544 { 545 struct uhid_softc *sc; 546 int error; 547 548 error = uhid_enter(dev, &sc); 549 if (error) 550 return error; 551 error = uhid_do_read(sc, uio, flag); 552 uhid_exit(sc); 553 return error; 554 } 555 556 Static int 557 uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag) 558 { 559 int error; 560 int size; 561 usbd_status err; 562 563 DPRINTFN(1, ("uhidwrite\n")); 564 565 size = sc->sc_osize; 566 if (uio->uio_resid != size || size == 0) 567 return EINVAL; 568 error = uiomove(sc->sc_obuf, size, uio); 569 #ifdef UHID_DEBUG 570 if (uhiddebug > 5) { 571 uint32_t i; 572 573 DPRINTF(("%s: outdata[%d] =", device_xname(sc->sc_hdev.sc_dev), 574 error)); 575 for (i = 0; i < size; i++) 576 DPRINTF((" %02x", sc->sc_obuf[i])); 577 DPRINTF(("\n")); 578 } 579 #endif 580 if (!error) { 581 if (sc->sc_raw) 582 err = uhidev_write(sc->sc_hdev.sc_parent, sc->sc_obuf, 583 size); 584 else 585 err = uhidev_set_report(&sc->sc_hdev, 586 UHID_OUTPUT_REPORT, sc->sc_obuf, size); 587 if (err) { 588 DPRINTF(("%s: err = %d\n", 589 device_xname(sc->sc_hdev.sc_dev), err)); 590 error = EIO; 591 } 592 } 593 594 return error; 595 } 596 597 int 598 uhidwrite(dev_t dev, struct uio *uio, int flag) 599 { 600 struct uhid_softc *sc; 601 int error; 602 603 error = uhid_enter(dev, &sc); 604 if (error) 605 return error; 606 error = uhid_do_write(sc, uio, flag); 607 uhid_exit(sc); 608 return error; 609 } 610 611 int 612 uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, void *addr, 613 int flag, struct lwp *l) 614 { 615 struct usb_ctl_report_desc *rd; 616 struct usb_ctl_report *re; 617 u_char buffer[UHID_CHUNK]; 618 int size, extra; 619 usbd_status err; 620 void *desc; 621 622 DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd)); 623 624 switch (cmd) { 625 case FIONBIO: 626 /* All handled in the upper FS layer. */ 627 break; 628 629 case FIOASYNC: 630 mutex_enter(&proc_lock); 631 if (*(int *)addr) { 632 if (sc->sc_async != NULL) { 633 mutex_exit(&proc_lock); 634 return EBUSY; 635 } 636 atomic_store_relaxed(&sc->sc_async, l->l_proc); 637 DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n", l->l_proc)); 638 } else 639 atomic_store_relaxed(&sc->sc_async, NULL); 640 mutex_exit(&proc_lock); 641 break; 642 643 /* XXX this is not the most general solution. */ 644 case TIOCSPGRP: 645 mutex_enter(&proc_lock); 646 if (sc->sc_async == NULL) { 647 mutex_exit(&proc_lock); 648 return EINVAL; 649 } 650 if (*(int *)addr != sc->sc_async->p_pgid) { 651 mutex_exit(&proc_lock); 652 return EPERM; 653 } 654 mutex_exit(&proc_lock); 655 break; 656 657 case FIOSETOWN: 658 mutex_enter(&proc_lock); 659 if (sc->sc_async == NULL) { 660 mutex_exit(&proc_lock); 661 return EINVAL; 662 } 663 if (-*(int *)addr != sc->sc_async->p_pgid 664 && *(int *)addr != sc->sc_async->p_pid) { 665 mutex_exit(&proc_lock); 666 return EPERM; 667 } 668 mutex_exit(&proc_lock); 669 break; 670 671 case USB_HID_GET_RAW: 672 *(int *)addr = sc->sc_raw; 673 break; 674 675 case USB_HID_SET_RAW: 676 sc->sc_raw = *(int *)addr; 677 break; 678 679 case USB_GET_REPORT_DESC: 680 uhidev_get_report_desc(sc->sc_hdev.sc_parent, &desc, &size); 681 rd = (struct usb_ctl_report_desc *)addr; 682 size = uimin(size, sizeof(rd->ucrd_data)); 683 rd->ucrd_size = size; 684 memcpy(rd->ucrd_data, desc, size); 685 break; 686 687 case USB_SET_IMMED: 688 if (*(int *)addr) { 689 extra = sc->sc_hdev.sc_report_id != 0; 690 if (sc->sc_isize + extra > sizeof(buffer)) 691 return ENOBUFS; 692 err = uhidev_get_report(&sc->sc_hdev, UHID_INPUT_REPORT, 693 buffer, sc->sc_isize + extra); 694 if (err) 695 return EOPNOTSUPP; 696 697 atomic_or_32(&sc->sc_state, UHID_IMMED); 698 } else 699 atomic_and_32(&sc->sc_state, ~UHID_IMMED); 700 break; 701 702 case USB_GET_REPORT: 703 re = (struct usb_ctl_report *)addr; 704 switch (re->ucr_report) { 705 case UHID_INPUT_REPORT: 706 size = sc->sc_isize; 707 break; 708 case UHID_OUTPUT_REPORT: 709 size = sc->sc_osize; 710 break; 711 case UHID_FEATURE_REPORT: 712 size = sc->sc_fsize; 713 break; 714 default: 715 return EINVAL; 716 } 717 extra = sc->sc_hdev.sc_report_id != 0; 718 if (size + extra > sizeof(re->ucr_data)) 719 return ENOBUFS; 720 err = uhidev_get_report(&sc->sc_hdev, re->ucr_report, 721 re->ucr_data, size + extra); 722 if (extra) 723 memmove(re->ucr_data, re->ucr_data+1, size); 724 if (err) 725 return EIO; 726 break; 727 728 case USB_SET_REPORT: 729 re = (struct usb_ctl_report *)addr; 730 switch (re->ucr_report) { 731 case UHID_INPUT_REPORT: 732 size = sc->sc_isize; 733 break; 734 case UHID_OUTPUT_REPORT: 735 size = sc->sc_osize; 736 break; 737 case UHID_FEATURE_REPORT: 738 size = sc->sc_fsize; 739 break; 740 default: 741 return EINVAL; 742 } 743 if (size > sizeof(re->ucr_data)) 744 return ENOBUFS; 745 err = uhidev_set_report(&sc->sc_hdev, re->ucr_report, 746 re->ucr_data, size); 747 if (err) 748 return EIO; 749 break; 750 751 case USB_GET_REPORT_ID: 752 *(int *)addr = sc->sc_hdev.sc_report_id; 753 break; 754 755 case USB_GET_DEVICE_DESC: 756 *(usb_device_descriptor_t *)addr = 757 *usbd_get_device_descriptor(sc->sc_hdev.sc_parent->sc_udev); 758 break; 759 760 case USB_GET_DEVICEINFO: 761 usbd_fill_deviceinfo(sc->sc_hdev.sc_parent->sc_udev, 762 (struct usb_device_info *)addr, 0); 763 break; 764 case USB_GET_DEVICEINFO_OLD: 765 MODULE_HOOK_CALL(usb_subr_fill_30_hook, 766 (sc->sc_hdev.sc_parent->sc_udev, 767 (struct usb_device_info_old *)addr, 0, 768 usbd_devinfo_vp, usbd_printBCD), 769 enosys(), err); 770 if (err == 0) 771 return 0; 772 break; 773 case USB_GET_STRING_DESC: 774 { 775 struct usb_string_desc *si = (struct usb_string_desc *)addr; 776 err = usbd_get_string_desc(sc->sc_hdev.sc_parent->sc_udev, 777 si->usd_string_index, 778 si->usd_language_id, &si->usd_desc, &size); 779 if (err) 780 return EINVAL; 781 break; 782 } 783 784 default: 785 return EINVAL; 786 } 787 return 0; 788 } 789 790 static int 791 uhidioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 792 { 793 struct uhid_softc *sc; 794 int error; 795 796 error = uhid_enter(dev, &sc); 797 if (error) 798 return error; 799 error = uhid_do_ioctl(sc, cmd, addr, flag, l); 800 uhid_exit(sc); 801 return error; 802 } 803 804 static int 805 uhidpoll(dev_t dev, int events, struct lwp *l) 806 { 807 struct uhid_softc *sc; 808 int revents = 0; 809 810 if (uhid_enter(dev, &sc) != 0) 811 return POLLHUP; 812 813 mutex_enter(&sc->sc_lock); 814 if (events & (POLLOUT | POLLWRNORM)) 815 revents |= events & (POLLOUT | POLLWRNORM); 816 if (events & (POLLIN | POLLRDNORM)) { 817 if (sc->sc_q.c_cc > 0) 818 revents |= events & (POLLIN | POLLRDNORM); 819 else 820 selrecord(l, &sc->sc_rsel); 821 } 822 mutex_exit(&sc->sc_lock); 823 824 uhid_exit(sc); 825 return revents; 826 } 827 828 static void 829 filt_uhidrdetach(struct knote *kn) 830 { 831 struct uhid_softc *sc = kn->kn_hook; 832 833 mutex_enter(&sc->sc_lock); 834 selremove_knote(&sc->sc_rsel, kn); 835 mutex_exit(&sc->sc_lock); 836 } 837 838 static int 839 filt_uhidread(struct knote *kn, long hint) 840 { 841 struct uhid_softc *sc = kn->kn_hook; 842 843 if (hint == NOTE_SUBMIT) 844 KASSERT(mutex_owned(&sc->sc_lock)); 845 else 846 mutex_enter(&sc->sc_lock); 847 848 kn->kn_data = sc->sc_q.c_cc; 849 850 if (hint == NOTE_SUBMIT) 851 KASSERT(mutex_owned(&sc->sc_lock)); 852 else 853 mutex_exit(&sc->sc_lock); 854 855 return kn->kn_data > 0; 856 } 857 858 static const struct filterops uhidread_filtops = { 859 .f_flags = FILTEROP_ISFD, 860 .f_attach = NULL, 861 .f_detach = filt_uhidrdetach, 862 .f_event = filt_uhidread, 863 }; 864 865 static const struct filterops uhid_seltrue_filtops = { 866 .f_flags = FILTEROP_ISFD, 867 .f_attach = NULL, 868 .f_detach = filt_uhidrdetach, 869 .f_event = filt_seltrue, 870 }; 871 872 static int 873 uhidkqfilter(dev_t dev, struct knote *kn) 874 { 875 struct uhid_softc *sc; 876 int error; 877 878 error = uhid_enter(dev, &sc); 879 if (error) 880 return error; 881 882 switch (kn->kn_filter) { 883 case EVFILT_READ: 884 kn->kn_fop = &uhidread_filtops; 885 break; 886 case EVFILT_WRITE: 887 kn->kn_fop = &uhid_seltrue_filtops; 888 break; 889 default: 890 error = EINVAL; 891 goto out; 892 } 893 894 kn->kn_hook = sc; 895 896 mutex_enter(&sc->sc_lock); 897 selrecord_knote(&sc->sc_rsel, kn); 898 mutex_exit(&sc->sc_lock); 899 900 out: uhid_exit(sc); 901 return error; 902 } 903
Indexes created Thu Oct 02 14:10:14 GMT 2025