uhid.c revision 1.114
1 /* $NetBSD: uhid.c,v 1.114 2020/05/23 23:42:42 ad 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 1.114 2020/05/23 23:42:42 ad 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/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/kmem.h> 49 #include <sys/signalvar.h> 50 #include <sys/device.h> 51 #include <sys/ioctl.h> 52 #include <sys/conf.h> 53 #include <sys/tty.h> 54 #include <sys/file.h> 55 #include <sys/select.h> 56 #include <sys/proc.h> 57 #include <sys/vnode.h> 58 #include <sys/poll.h> 59 #include <sys/intr.h> 60 #include <sys/compat_stub.h> 61 62 #include <dev/usb/usb.h> 63 #include <dev/usb/usbhid.h> 64 65 #include <dev/usb/usbdevs.h> 66 #include <dev/usb/usbdi.h> 67 #include <dev/usb/usbdi_util.h> 68 #include <dev/usb/usb_quirks.h> 69 #include <dev/hid/hid.h> 70 71 #include <dev/usb/uhidev.h> 72 73 #include "ioconf.h" 74 75 #ifdef UHID_DEBUG 76 #define DPRINTF(x) if (uhiddebug) printf x 77 #define DPRINTFN(n,x) if (uhiddebug>(n)) printf x 78 int uhiddebug = 0; 79 #else 80 #define DPRINTF(x) 81 #define DPRINTFN(n,x) 82 #endif 83 84 struct uhid_softc { 85 struct uhidev sc_hdev; 86 87 kmutex_t sc_access_lock; /* serialises syscall accesses */ 88 kmutex_t sc_lock; /* protects refcnt, others */ 89 kcondvar_t sc_cv; 90 kcondvar_t sc_detach_cv; 91 92 int sc_isize; 93 int sc_osize; 94 int sc_fsize; 95 96 u_char *sc_obuf; 97 98 struct clist sc_q; /* protected by sc_lock */ 99 struct selinfo sc_rsel; 100 proc_t *sc_async; /* process that wants SIGIO */ 101 void *sc_sih; 102 u_char sc_state; /* driver state */ 103 #define UHID_ASLP 0x01 /* waiting for device data */ 104 #define UHID_IMMED 0x02 /* return read data immediately */ 105 106 int sc_refcnt; 107 int sc_raw; 108 u_char sc_dying; 109 }; 110 111 #define UHIDUNIT(dev) (minor(dev)) 112 #define UHID_CHUNK 128 /* chunk size for read */ 113 #define UHID_BSIZE 1020 /* buffer size */ 114 115 static dev_type_open(uhidopen); 116 static dev_type_close(uhidclose); 117 static dev_type_read(uhidread); 118 static dev_type_write(uhidwrite); 119 static dev_type_ioctl(uhidioctl); 120 static dev_type_poll(uhidpoll); 121 static dev_type_kqfilter(uhidkqfilter); 122 123 const struct cdevsw uhid_cdevsw = { 124 .d_open = uhidopen, 125 .d_close = uhidclose, 126 .d_read = uhidread, 127 .d_write = uhidwrite, 128 .d_ioctl = uhidioctl, 129 .d_stop = nostop, 130 .d_tty = notty, 131 .d_poll = uhidpoll, 132 .d_mmap = nommap, 133 .d_kqfilter = uhidkqfilter, 134 .d_discard = nodiscard, 135 .d_flag = D_OTHER 136 }; 137 138 Static void uhid_intr(struct uhidev *, void *, u_int); 139 Static void uhid_softintr(void *); 140 141 Static int uhid_do_read(struct uhid_softc *, struct uio *, int); 142 Static int uhid_do_write(struct uhid_softc *, struct uio *, int); 143 Static int uhid_do_ioctl(struct uhid_softc*, u_long, void *, int, struct lwp *); 144 145 static int uhid_match(device_t, cfdata_t, void *); 146 static void uhid_attach(device_t, device_t, void *); 147 static int uhid_detach(device_t, int); 148 static int uhid_activate(device_t, enum devact); 149 150 CFATTACH_DECL_NEW(uhid, sizeof(struct uhid_softc), uhid_match, uhid_attach, 151 uhid_detach, uhid_activate); 152 153 static int 154 uhid_match(device_t parent, cfdata_t match, void *aux) 155 { 156 #ifdef UHID_DEBUG 157 struct uhidev_attach_arg *uha = aux; 158 #endif 159 160 DPRINTF(("uhid_match: report=%d\n", uha->reportid)); 161 162 if (match->cf_flags & 1) 163 return UMATCH_HIGHEST; 164 else 165 return UMATCH_IFACECLASS_GENERIC; 166 } 167 168 static void 169 uhid_attach(device_t parent, device_t self, void *aux) 170 { 171 struct uhid_softc *sc = device_private(self); 172 struct uhidev_attach_arg *uha = aux; 173 int size, repid; 174 void *desc; 175 176 sc->sc_hdev.sc_dev = self; 177 selinit(&sc->sc_rsel); 178 sc->sc_hdev.sc_intr = uhid_intr; 179 sc->sc_hdev.sc_parent = uha->parent; 180 sc->sc_hdev.sc_report_id = uha->reportid; 181 sc->sc_sih = softint_establish(SOFTINT_CLOCK, uhid_softintr, sc); 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_access_lock, MUTEX_DEFAULT, IPL_NONE); 196 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_SOFTUSB); 197 cv_init(&sc->sc_cv, "uhidrea"); 198 cv_init(&sc->sc_detach_cv, "uhiddet"); 199 200 if (!pmf_device_register(self, NULL, NULL)) 201 aprint_error_dev(self, "couldn't establish power handler\n"); 202 203 return; 204 } 205 206 static int 207 uhid_activate(device_t self, enum devact act) 208 { 209 struct uhid_softc *sc = device_private(self); 210 211 switch (act) { 212 case DVACT_DEACTIVATE: 213 sc->sc_dying = 1; 214 return 0; 215 default: 216 return EOPNOTSUPP; 217 } 218 } 219 220 static int 221 uhid_detach(device_t self, int flags) 222 { 223 struct uhid_softc *sc = device_private(self); 224 int maj, mn; 225 226 DPRINTF(("uhid_detach: sc=%p flags=%d\n", sc, flags)); 227 228 sc->sc_dying = 1; 229 230 pmf_device_deregister(self); 231 232 mutex_enter(&sc->sc_lock); 233 if (sc->sc_hdev.sc_state & UHIDEV_OPEN) { 234 if (--sc->sc_refcnt >= 0) { 235 /* Wake everyone */ 236 cv_broadcast(&sc->sc_cv); 237 /* Wait for processes to go away. */ 238 if (cv_timedwait(&sc->sc_detach_cv, &sc->sc_lock, hz * 60)) 239 aprint_error_dev(self, ": didn't detach\n"); 240 } 241 } 242 mutex_exit(&sc->sc_lock); 243 244 /* locate the major number */ 245 maj = cdevsw_lookup_major(&uhid_cdevsw); 246 247 /* Nuke the vnodes for any open instances (calls close). */ 248 mn = device_unit(self); 249 vdevgone(maj, mn, mn, VCHR); 250 251 #if 0 252 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, 253 sc->sc_hdev.sc_parent->sc_udev, sc->sc_hdev.sc_dev); 254 #endif 255 cv_destroy(&sc->sc_cv); 256 cv_destroy(&sc->sc_detach_cv); 257 mutex_destroy(&sc->sc_lock); 258 mutex_destroy(&sc->sc_access_lock); 259 seldestroy(&sc->sc_rsel); 260 softint_disestablish(sc->sc_sih); 261 262 return 0; 263 } 264 265 void 266 uhid_intr(struct uhidev *addr, void *data, u_int len) 267 { 268 struct uhid_softc *sc = (struct uhid_softc *)addr; 269 270 #ifdef UHID_DEBUG 271 if (uhiddebug > 5) { 272 uint32_t i; 273 274 DPRINTF(("uhid_intr: data =")); 275 for (i = 0; i < len; i++) 276 DPRINTF((" %02x", ((u_char *)data)[i])); 277 DPRINTF(("\n")); 278 } 279 #endif 280 281 mutex_enter(&sc->sc_lock); 282 (void)b_to_q(data, len, &sc->sc_q); 283 284 if (sc->sc_state & UHID_ASLP) { 285 sc->sc_state &= ~UHID_ASLP; 286 DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q)); 287 cv_broadcast(&sc->sc_cv); 288 } 289 selnotify(&sc->sc_rsel, 0, 0); 290 if (sc->sc_async != NULL) { 291 DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n", sc->sc_async)); 292 softint_schedule(sc->sc_sih); 293 } 294 mutex_exit(&sc->sc_lock); 295 } 296 297 void 298 uhid_softintr(void *cookie) 299 { 300 struct uhid_softc *sc; 301 302 sc = cookie; 303 304 mutex_enter(&proc_lock); 305 if (sc->sc_async != NULL) 306 psignal(sc->sc_async, SIGIO); 307 mutex_exit(&proc_lock); 308 } 309 310 static int 311 uhidopen(dev_t dev, int flag, int mode, struct lwp *l) 312 { 313 struct uhid_softc *sc; 314 int error; 315 316 sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); 317 if (sc == NULL) 318 return ENXIO; 319 320 DPRINTF(("uhidopen: sc=%p\n", sc)); 321 322 if (sc->sc_dying) 323 return ENXIO; 324 325 mutex_enter(&sc->sc_lock); 326 327 /* 328 * uhid interrupts aren't enabled yet, so setup sc_q now, as 329 * long as they're not already allocated. 330 */ 331 if (sc->sc_hdev.sc_state & UHIDEV_OPEN) { 332 mutex_exit(&sc->sc_lock); 333 return EBUSY; 334 } 335 mutex_exit(&sc->sc_lock); 336 337 if (clalloc(&sc->sc_q, UHID_BSIZE, 0) == -1) { 338 return ENOMEM; 339 } 340 341 mutex_enter(&sc->sc_access_lock); 342 error = uhidev_open(&sc->sc_hdev); 343 if (error) { 344 clfree(&sc->sc_q); 345 mutex_exit(&sc->sc_access_lock); 346 return error; 347 } 348 mutex_exit(&sc->sc_access_lock); 349 350 if (sc->sc_osize > 0) 351 sc->sc_obuf = kmem_alloc(sc->sc_osize, KM_SLEEP); 352 else 353 sc->sc_obuf = NULL; 354 sc->sc_state &= ~UHID_IMMED; 355 356 mutex_enter(&proc_lock); 357 sc->sc_async = NULL; 358 mutex_exit(&proc_lock); 359 360 return 0; 361 } 362 363 static int 364 uhidclose(dev_t dev, int flag, int mode, struct lwp *l) 365 { 366 struct uhid_softc *sc; 367 368 sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); 369 370 DPRINTF(("uhidclose: sc=%p\n", sc)); 371 372 mutex_enter(&proc_lock); 373 sc->sc_async = NULL; 374 mutex_exit(&proc_lock); 375 376 mutex_enter(&sc->sc_access_lock); 377 378 uhidev_stop(&sc->sc_hdev); 379 380 clfree(&sc->sc_q); 381 if (sc->sc_osize > 0) 382 kmem_free(sc->sc_obuf, sc->sc_osize); 383 384 uhidev_close(&sc->sc_hdev); 385 386 mutex_exit(&sc->sc_access_lock); 387 388 return 0; 389 } 390 391 Static int 392 uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag) 393 { 394 int error = 0; 395 int extra; 396 size_t length; 397 u_char buffer[UHID_CHUNK]; 398 usbd_status err; 399 400 DPRINTFN(1, ("uhidread\n")); 401 if (sc->sc_state & UHID_IMMED) { 402 DPRINTFN(1, ("uhidread immed\n")); 403 extra = sc->sc_hdev.sc_report_id != 0; 404 if (sc->sc_isize + extra > sizeof(buffer)) 405 return ENOBUFS; 406 err = uhidev_get_report(&sc->sc_hdev, UHID_INPUT_REPORT, 407 buffer, sc->sc_isize + extra); 408 if (err) 409 return EIO; 410 return uiomove(buffer+extra, sc->sc_isize, uio); 411 } 412 413 mutex_enter(&sc->sc_lock); 414 while (sc->sc_q.c_cc == 0) { 415 if (flag & IO_NDELAY) { 416 mutex_exit(&sc->sc_lock); 417 return EWOULDBLOCK; 418 } 419 sc->sc_state |= UHID_ASLP; 420 DPRINTFN(5, ("uhidread: sleep on %p\n", &sc->sc_q)); 421 error = cv_wait_sig(&sc->sc_cv, &sc->sc_lock); 422 DPRINTFN(5, ("uhidread: woke, error=%d\n", error)); 423 if (sc->sc_dying) 424 error = EIO; 425 if (error) { 426 sc->sc_state &= ~UHID_ASLP; 427 break; 428 } 429 } 430 431 /* Transfer as many chunks as possible. */ 432 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) { 433 length = uimin(sc->sc_q.c_cc, uio->uio_resid); 434 if (length > sizeof(buffer)) 435 length = sizeof(buffer); 436 437 /* Remove a small chunk from the input queue. */ 438 (void) q_to_b(&sc->sc_q, buffer, length); 439 DPRINTFN(5, ("uhidread: got %lu chars\n", (u_long)length)); 440 441 /* Copy the data to the user process. */ 442 mutex_exit(&sc->sc_lock); 443 if ((error = uiomove(buffer, length, uio)) != 0) 444 return error; 445 mutex_enter(&sc->sc_lock); 446 } 447 448 mutex_exit(&sc->sc_lock); 449 return error; 450 } 451 452 static int 453 uhidread(dev_t dev, struct uio *uio, int flag) 454 { 455 struct uhid_softc *sc; 456 int error; 457 458 sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); 459 460 mutex_enter(&sc->sc_lock); 461 sc->sc_refcnt++; 462 mutex_exit(&sc->sc_lock); 463 464 mutex_enter(&sc->sc_access_lock); 465 error = uhid_do_read(sc, uio, flag); 466 mutex_exit(&sc->sc_access_lock); 467 468 mutex_enter(&sc->sc_lock); 469 if (--sc->sc_refcnt < 0) 470 cv_broadcast(&sc->sc_detach_cv); 471 mutex_exit(&sc->sc_lock); 472 return error; 473 } 474 475 Static int 476 uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag) 477 { 478 int error; 479 int size; 480 usbd_status err; 481 482 DPRINTFN(1, ("uhidwrite\n")); 483 484 if (sc->sc_dying) 485 return EIO; 486 487 size = sc->sc_osize; 488 if (uio->uio_resid != size || size == 0) 489 return EINVAL; 490 error = uiomove(sc->sc_obuf, size, uio); 491 #ifdef UHID_DEBUG 492 if (uhiddebug > 5) { 493 uint32_t i; 494 495 DPRINTF(("%s: outdata[%d] =", device_xname(sc->sc_hdev.sc_dev), 496 error)); 497 for (i = 0; i < size; i++) 498 DPRINTF((" %02x", sc->sc_obuf[i])); 499 DPRINTF(("\n")); 500 } 501 #endif 502 if (!error) { 503 if (sc->sc_raw) 504 err = uhidev_write(sc->sc_hdev.sc_parent, sc->sc_obuf, 505 size); 506 else 507 err = uhidev_set_report(&sc->sc_hdev, 508 UHID_OUTPUT_REPORT, sc->sc_obuf, size); 509 if (err) { 510 DPRINTF(("%s: err = %d\n", 511 device_xname(sc->sc_hdev.sc_dev), err)); 512 error = EIO; 513 } 514 } 515 516 return error; 517 } 518 519 int 520 uhidwrite(dev_t dev, struct uio *uio, int flag) 521 { 522 struct uhid_softc *sc; 523 int error; 524 525 sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); 526 527 mutex_enter(&sc->sc_lock); 528 sc->sc_refcnt++; 529 mutex_exit(&sc->sc_lock); 530 531 mutex_enter(&sc->sc_access_lock); 532 error = uhid_do_write(sc, uio, flag); 533 mutex_exit(&sc->sc_access_lock); 534 535 mutex_enter(&sc->sc_lock); 536 if (--sc->sc_refcnt < 0) 537 cv_broadcast(&sc->sc_detach_cv); 538 mutex_exit(&sc->sc_lock); 539 return error; 540 } 541 542 int 543 uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, void *addr, 544 int flag, struct lwp *l) 545 { 546 struct usb_ctl_report_desc *rd; 547 struct usb_ctl_report *re; 548 u_char buffer[UHID_CHUNK]; 549 int size, extra; 550 usbd_status err; 551 void *desc; 552 553 DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd)); 554 555 if (sc->sc_dying) 556 return EIO; 557 558 switch (cmd) { 559 case FIONBIO: 560 /* All handled in the upper FS layer. */ 561 break; 562 563 case FIOASYNC: 564 mutex_enter(&proc_lock); 565 if (*(int *)addr) { 566 if (sc->sc_async != NULL) { 567 mutex_exit(&proc_lock); 568 return EBUSY; 569 } 570 sc->sc_async = l->l_proc; 571 DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n", l->l_proc)); 572 } else 573 sc->sc_async = NULL; 574 mutex_exit(&proc_lock); 575 break; 576 577 /* XXX this is not the most general solution. */ 578 case TIOCSPGRP: 579 mutex_enter(&proc_lock); 580 if (sc->sc_async == NULL) { 581 mutex_exit(&proc_lock); 582 return EINVAL; 583 } 584 if (*(int *)addr != sc->sc_async->p_pgid) { 585 mutex_exit(&proc_lock); 586 return EPERM; 587 } 588 mutex_exit(&proc_lock); 589 break; 590 591 case FIOSETOWN: 592 mutex_enter(&proc_lock); 593 if (sc->sc_async == NULL) { 594 mutex_exit(&proc_lock); 595 return EINVAL; 596 } 597 if (-*(int *)addr != sc->sc_async->p_pgid 598 && *(int *)addr != sc->sc_async->p_pid) { 599 mutex_exit(&proc_lock); 600 return EPERM; 601 } 602 mutex_exit(&proc_lock); 603 break; 604 605 case USB_HID_GET_RAW: 606 *(int *)addr = sc->sc_raw; 607 break; 608 609 case USB_HID_SET_RAW: 610 sc->sc_raw = *(int *)addr; 611 break; 612 613 case USB_GET_REPORT_DESC: 614 uhidev_get_report_desc(sc->sc_hdev.sc_parent, &desc, &size); 615 rd = (struct usb_ctl_report_desc *)addr; 616 size = uimin(size, sizeof(rd->ucrd_data)); 617 rd->ucrd_size = size; 618 memcpy(rd->ucrd_data, desc, size); 619 break; 620 621 case USB_SET_IMMED: 622 if (*(int *)addr) { 623 extra = sc->sc_hdev.sc_report_id != 0; 624 if (sc->sc_isize + extra > sizeof(buffer)) 625 return ENOBUFS; 626 err = uhidev_get_report(&sc->sc_hdev, UHID_INPUT_REPORT, 627 buffer, sc->sc_isize + extra); 628 if (err) 629 return EOPNOTSUPP; 630 631 sc->sc_state |= UHID_IMMED; 632 } else 633 sc->sc_state &= ~UHID_IMMED; 634 break; 635 636 case USB_GET_REPORT: 637 re = (struct usb_ctl_report *)addr; 638 switch (re->ucr_report) { 639 case UHID_INPUT_REPORT: 640 size = sc->sc_isize; 641 break; 642 case UHID_OUTPUT_REPORT: 643 size = sc->sc_osize; 644 break; 645 case UHID_FEATURE_REPORT: 646 size = sc->sc_fsize; 647 break; 648 default: 649 return EINVAL; 650 } 651 extra = sc->sc_hdev.sc_report_id != 0; 652 if (size + extra > sizeof(re->ucr_data)) 653 return ENOBUFS; 654 err = uhidev_get_report(&sc->sc_hdev, re->ucr_report, 655 re->ucr_data, size + extra); 656 if (extra) 657 memmove(re->ucr_data, re->ucr_data+1, size); 658 if (err) 659 return EIO; 660 break; 661 662 case USB_SET_REPORT: 663 re = (struct usb_ctl_report *)addr; 664 switch (re->ucr_report) { 665 case UHID_INPUT_REPORT: 666 size = sc->sc_isize; 667 break; 668 case UHID_OUTPUT_REPORT: 669 size = sc->sc_osize; 670 break; 671 case UHID_FEATURE_REPORT: 672 size = sc->sc_fsize; 673 break; 674 default: 675 return EINVAL; 676 } 677 if (size > sizeof(re->ucr_data)) 678 return ENOBUFS; 679 err = uhidev_set_report(&sc->sc_hdev, re->ucr_report, 680 re->ucr_data, size); 681 if (err) 682 return EIO; 683 break; 684 685 case USB_GET_REPORT_ID: 686 *(int *)addr = sc->sc_hdev.sc_report_id; 687 break; 688 689 case USB_GET_DEVICE_DESC: 690 *(usb_device_descriptor_t *)addr = 691 *usbd_get_device_descriptor(sc->sc_hdev.sc_parent->sc_udev); 692 break; 693 694 case USB_GET_DEVICEINFO: 695 usbd_fill_deviceinfo(sc->sc_hdev.sc_parent->sc_udev, 696 (struct usb_device_info *)addr, 0); 697 break; 698 case USB_GET_DEVICEINFO_OLD: 699 MODULE_HOOK_CALL(usb_subr_fill_30_hook, 700 (sc->sc_hdev.sc_parent->sc_udev, 701 (struct usb_device_info_old *)addr, 0, 702 usbd_devinfo_vp, usbd_printBCD), 703 enosys(), err); 704 if (err == 0) 705 return 0; 706 break; 707 case USB_GET_STRING_DESC: 708 { 709 struct usb_string_desc *si = (struct usb_string_desc *)addr; 710 err = usbd_get_string_desc(sc->sc_hdev.sc_parent->sc_udev, 711 si->usd_string_index, 712 si->usd_language_id, &si->usd_desc, &size); 713 if (err) 714 return EINVAL; 715 break; 716 } 717 718 default: 719 return EINVAL; 720 } 721 return 0; 722 } 723 724 static int 725 uhidioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 726 { 727 struct uhid_softc *sc; 728 int error; 729 730 sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); 731 if (sc == NULL) 732 return ENXIO; 733 734 if (sc->sc_dying) 735 return EIO; 736 737 mutex_enter(&sc->sc_lock); 738 sc->sc_refcnt++; 739 mutex_exit(&sc->sc_lock); 740 741 mutex_enter(&sc->sc_access_lock); 742 error = uhid_do_ioctl(sc, cmd, addr, flag, l); 743 mutex_exit(&sc->sc_access_lock); 744 745 mutex_enter(&sc->sc_lock); 746 if (--sc->sc_refcnt < 0) 747 cv_broadcast(&sc->sc_detach_cv); 748 mutex_exit(&sc->sc_lock); 749 return error; 750 } 751 752 static int 753 uhidpoll(dev_t dev, int events, struct lwp *l) 754 { 755 struct uhid_softc *sc; 756 int revents = 0; 757 758 sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); 759 if (sc == NULL) 760 return ENXIO; 761 762 if (sc->sc_dying) 763 return EIO; 764 765 mutex_enter(&sc->sc_lock); 766 if (events & (POLLOUT | POLLWRNORM)) 767 revents |= events & (POLLOUT | POLLWRNORM); 768 if (events & (POLLIN | POLLRDNORM)) { 769 if (sc->sc_q.c_cc > 0) 770 revents |= events & (POLLIN | POLLRDNORM); 771 else 772 selrecord(l, &sc->sc_rsel); 773 } 774 mutex_exit(&sc->sc_lock); 775 776 return revents; 777 } 778 779 static void 780 filt_uhidrdetach(struct knote *kn) 781 { 782 struct uhid_softc *sc = kn->kn_hook; 783 784 mutex_enter(&sc->sc_lock); 785 SLIST_REMOVE(&sc->sc_rsel.sel_klist, kn, knote, kn_selnext); 786 mutex_exit(&sc->sc_lock); 787 } 788 789 static int 790 filt_uhidread(struct knote *kn, long hint) 791 { 792 struct uhid_softc *sc = kn->kn_hook; 793 794 kn->kn_data = sc->sc_q.c_cc; 795 return kn->kn_data > 0; 796 } 797 798 static const struct filterops uhidread_filtops = { 799 .f_isfd = 1, 800 .f_attach = NULL, 801 .f_detach = filt_uhidrdetach, 802 .f_event = filt_uhidread, 803 }; 804 805 static const struct filterops uhid_seltrue_filtops = { 806 .f_isfd = 1, 807 .f_attach = NULL, 808 .f_detach = filt_uhidrdetach, 809 .f_event = filt_seltrue, 810 }; 811 812 static int 813 uhidkqfilter(dev_t dev, struct knote *kn) 814 { 815 struct uhid_softc *sc; 816 struct klist *klist; 817 818 sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); 819 820 if (sc->sc_dying) 821 return ENXIO; 822 823 switch (kn->kn_filter) { 824 case EVFILT_READ: 825 klist = &sc->sc_rsel.sel_klist; 826 kn->kn_fop = &uhidread_filtops; 827 break; 828 829 case EVFILT_WRITE: 830 klist = &sc->sc_rsel.sel_klist; 831 kn->kn_fop = &uhid_seltrue_filtops; 832 break; 833 834 default: 835 return EINVAL; 836 } 837 838 kn->kn_hook = sc; 839 840 mutex_enter(&sc->sc_lock); 841 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 842 mutex_exit(&sc->sc_lock); 843 844 return 0; 845 } 846
Indexes created Wed Sep 24 05:09:52 GMT 2025