1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * Copyright (c) 2020 Vladimir Kondratyev <wulf@FreeBSD.org> 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Lennart Augustsson (lennart@augustsson.net) at 10 * Carlstedt Research & Technology. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * HID spec: http://www.usb.org/developers/devclass_docs/HID1_11.pdf 36 */ 37 38 #include <sys/cdefs.h> 39 #include "opt_hid.h" 40 41 #include <sys/param.h> 42 #ifdef COMPAT_FREEBSD32 43 #include <sys/abi_compat.h> 44 #endif 45 #include <sys/bus.h> 46 #include <sys/conf.h> 47 #include <sys/fcntl.h> 48 #include <sys/filio.h> 49 #include <sys/ioccom.h> 50 #include <sys/kernel.h> 51 #include <sys/lock.h> 52 #include <sys/malloc.h> 53 #include <sys/module.h> 54 #include <sys/mutex.h> 55 #include <sys/poll.h> 56 #include <sys/priv.h> 57 #include <sys/proc.h> 58 #include <sys/selinfo.h> 59 #include <sys/sysctl.h> 60 #include <sys/systm.h> 61 #include <sys/tty.h> 62 #include <sys/uio.h> 63 64 #define HID_DEBUG_VAR hidraw_debug 65 #include <dev/hid/hid.h> 66 #include <dev/hid/hidbus.h> 67 #include <dev/hid/hidraw.h> 68 69 #ifdef HID_DEBUG 70 static int hidraw_debug = 0; 71 static SYSCTL_NODE(_hw_hid, OID_AUTO, hidraw, CTLFLAG_RW, 0, 72 "HID raw interface"); 73 SYSCTL_INT(_hw_hid_hidraw, OID_AUTO, debug, CTLFLAG_RWTUN, 74 &hidraw_debug, 0, "Debug level"); 75 #endif 76 77 #define HIDRAW_INDEX 0xFF /* Arbitrary high value */ 78 79 #define HIDRAW_LOCAL_BUFSIZE 64 /* Size of on-stack buffer. */ 80 #define HIDRAW_LOCAL_ALLOC(local_buf, size) \ 81 (sizeof(local_buf) > (size) ? (local_buf) : \ 82 malloc((size), M_DEVBUF, M_ZERO | M_WAITOK)) 83 #define HIDRAW_LOCAL_FREE(local_buf, buf) \ 84 if ((local_buf) != (buf)) { \ 85 free((buf), M_DEVBUF); \ 86 } 87 88 struct hidraw_softc { 89 device_t sc_dev; /* base device */ 90 91 struct mtx sc_mtx; /* hidbus private mutex */ 92 93 struct hid_rdesc_info *sc_rdesc; 94 const struct hid_device_info *sc_hw; 95 96 uint8_t *sc_q; 97 hid_size_t *sc_qlen; 98 int sc_head; 99 int sc_tail; 100 int sc_sleepcnt; 101 102 struct selinfo sc_rsel; 103 struct proc *sc_async; /* process that wants SIGIO */ 104 struct { /* driver state */ 105 bool open:1; /* device is open */ 106 bool aslp:1; /* waiting for device data in read() */ 107 bool sel:1; /* waiting for device data in poll() */ 108 bool quiet:1; /* Ignore input data */ 109 bool immed:1; /* return read data immediately */ 110 bool uhid:1; /* driver switched in to uhid mode */ 111 bool lock:1; /* input queue sleepable lock */ 112 bool flush:1; /* do not wait for data in read() */ 113 } sc_state; 114 int sc_fflags; /* access mode for open lifetime */ 115 116 struct cdev *dev; 117 }; 118 119 #ifdef COMPAT_FREEBSD32 120 struct hidraw_gen_descriptor32 { 121 uint32_t hgd_data; /* void * */ 122 uint16_t hgd_lang_id; 123 uint16_t hgd_maxlen; 124 uint16_t hgd_actlen; 125 uint16_t hgd_offset; 126 uint8_t hgd_config_index; 127 uint8_t hgd_string_index; 128 uint8_t hgd_iface_index; 129 uint8_t hgd_altif_index; 130 uint8_t hgd_endpt_index; 131 uint8_t hgd_report_type; 132 uint8_t reserved[8]; 133 }; 134 #define HIDRAW_GET_REPORT_DESC32 \ 135 _IOC_NEWTYPE(HIDRAW_GET_REPORT_DESC, struct hidraw_gen_descriptor32) 136 #define HIDRAW_GET_REPORT32 \ 137 _IOC_NEWTYPE(HIDRAW_GET_REPORT, struct hidraw_gen_descriptor32) 138 #define HIDRAW_SET_REPORT_DESC32 \ 139 _IOC_NEWTYPE(HIDRAW_SET_REPORT_DESC, struct hidraw_gen_descriptor32) 140 #define HIDRAW_SET_REPORT32 \ 141 _IOC_NEWTYPE(HIDRAW_SET_REPORT, struct hidraw_gen_descriptor32) 142 #endif 143 144 static d_open_t hidraw_open; 145 static d_read_t hidraw_read; 146 static d_write_t hidraw_write; 147 static d_ioctl_t hidraw_ioctl; 148 static d_poll_t hidraw_poll; 149 static d_kqfilter_t hidraw_kqfilter; 150 151 static d_priv_dtor_t hidraw_dtor; 152 153 static struct cdevsw hidraw_cdevsw = { 154 .d_version = D_VERSION, 155 .d_open = hidraw_open, 156 .d_read = hidraw_read, 157 .d_write = hidraw_write, 158 .d_ioctl = hidraw_ioctl, 159 .d_poll = hidraw_poll, 160 .d_kqfilter = hidraw_kqfilter, 161 .d_name = "hidraw", 162 }; 163 164 static hid_intr_t hidraw_intr; 165 166 static device_identify_t hidraw_identify; 167 static device_probe_t hidraw_probe; 168 static device_attach_t hidraw_attach; 169 static device_detach_t hidraw_detach; 170 171 static int hidraw_kqread(struct knote *, long); 172 static void hidraw_kqdetach(struct knote *); 173 static void hidraw_notify(struct hidraw_softc *); 174 175 static struct filterops hidraw_filterops_read = { 176 .f_isfd = 1, 177 .f_detach = hidraw_kqdetach, 178 .f_event = hidraw_kqread, 179 }; 180 181 static void 182 hidraw_identify(driver_t *driver, device_t parent) 183 { 184 device_t child; 185 186 if (device_find_child(parent, "hidraw", -1) == NULL) { 187 child = BUS_ADD_CHILD(parent, 0, "hidraw", 188 device_get_unit(parent)); 189 if (child != NULL) 190 hidbus_set_index(child, HIDRAW_INDEX); 191 } 192 } 193 194 static int 195 hidraw_probe(device_t self) 196 { 197 198 if (hidbus_get_index(self) != HIDRAW_INDEX) 199 return (ENXIO); 200 201 hidbus_set_desc(self, "Raw HID Device"); 202 203 return (BUS_PROBE_GENERIC); 204 } 205 206 static int 207 hidraw_attach(device_t self) 208 { 209 struct hidraw_softc *sc = device_get_softc(self); 210 struct make_dev_args mda; 211 int error; 212 213 sc->sc_dev = self; 214 sc->sc_rdesc = hidbus_get_rdesc_info(self); 215 sc->sc_hw = hid_get_device_info(self); 216 217 /* Hidraw mode does not require report descriptor to work */ 218 if (sc->sc_rdesc->data == NULL || sc->sc_rdesc->len == 0) 219 device_printf(self, "no report descriptor\n"); 220 221 mtx_init(&sc->sc_mtx, "hidraw lock", NULL, MTX_DEF); 222 knlist_init_mtx(&sc->sc_rsel.si_note, &sc->sc_mtx); 223 224 make_dev_args_init(&mda); 225 mda.mda_flags = MAKEDEV_WAITOK; 226 mda.mda_devsw = &hidraw_cdevsw; 227 mda.mda_uid = UID_ROOT; 228 mda.mda_gid = GID_OPERATOR; 229 mda.mda_mode = 0600; 230 mda.mda_si_drv1 = sc; 231 232 error = make_dev_s(&mda, &sc->dev, "hidraw%d", device_get_unit(self)); 233 if (error) { 234 device_printf(self, "Can not create character device\n"); 235 hidraw_detach(self); 236 return (error); 237 } 238 #ifdef HIDRAW_MAKE_UHID_ALIAS 239 (void)make_dev_alias(sc->dev, "uhid%d", device_get_unit(self)); 240 #endif 241 242 hidbus_set_lock(self, &sc->sc_mtx); 243 hidbus_set_intr(self, hidraw_intr, sc); 244 245 return (0); 246 } 247 248 static int 249 hidraw_detach(device_t self) 250 { 251 struct hidraw_softc *sc = device_get_softc(self); 252 253 DPRINTF("sc=%p\n", sc); 254 255 if (sc->dev != NULL) { 256 mtx_lock(&sc->sc_mtx); 257 sc->dev->si_drv1 = NULL; 258 /* Wake everyone */ 259 hidraw_notify(sc); 260 mtx_unlock(&sc->sc_mtx); 261 destroy_dev(sc->dev); 262 } 263 264 knlist_clear(&sc->sc_rsel.si_note, 0); 265 knlist_destroy(&sc->sc_rsel.si_note); 266 seldrain(&sc->sc_rsel); 267 mtx_destroy(&sc->sc_mtx); 268 269 return (0); 270 } 271 272 void 273 hidraw_intr(void *context, void *buf, hid_size_t len) 274 { 275 struct hidraw_softc *sc = context; 276 int next; 277 278 DPRINTFN(5, "len=%d\n", len); 279 DPRINTFN(5, "data = %*D\n", len, buf, " "); 280 281 next = (sc->sc_tail + 1) % HIDRAW_BUFFER_SIZE; 282 if (sc->sc_state.quiet || next == sc->sc_head) 283 return; 284 285 bcopy(buf, sc->sc_q + sc->sc_tail * sc->sc_rdesc->rdsize, len); 286 287 /* Make sure we don't process old data */ 288 if (len < sc->sc_rdesc->rdsize) 289 bzero(sc->sc_q + sc->sc_tail * sc->sc_rdesc->rdsize + len, 290 sc->sc_rdesc->isize - len); 291 292 sc->sc_qlen[sc->sc_tail] = len; 293 sc->sc_tail = next; 294 295 hidraw_notify(sc); 296 } 297 298 static inline int 299 hidraw_lock_queue(struct hidraw_softc *sc, bool flush) 300 { 301 int error = 0; 302 303 mtx_assert(&sc->sc_mtx, MA_OWNED); 304 305 if (flush) 306 sc->sc_state.flush = true; 307 ++sc->sc_sleepcnt; 308 while (sc->sc_state.lock && error == 0) { 309 /* Flush is requested. Wakeup all readers and forbid sleeps */ 310 if (flush && sc->sc_state.aslp) { 311 sc->sc_state.aslp = false; 312 DPRINTFN(5, "waking %p\n", &sc->sc_q); 313 wakeup(&sc->sc_q); 314 } 315 error = mtx_sleep(&sc->sc_sleepcnt, &sc->sc_mtx, 316 PZERO | PCATCH, "hidrawio", 0); 317 } 318 --sc->sc_sleepcnt; 319 if (flush) 320 sc->sc_state.flush = false; 321 if (error == 0) 322 sc->sc_state.lock = true; 323 324 return (error); 325 } 326 327 static inline void 328 hidraw_unlock_queue(struct hidraw_softc *sc) 329 { 330 331 mtx_assert(&sc->sc_mtx, MA_OWNED); 332 KASSERT(sc->sc_state.lock, ("input buffer is not locked")); 333 334 if (sc->sc_sleepcnt != 0) 335 wakeup_one(&sc->sc_sleepcnt); 336 sc->sc_state.lock = false; 337 } 338 339 static int 340 hidraw_open(struct cdev *dev, int flag, int mode, struct thread *td) 341 { 342 struct hidraw_softc *sc; 343 int error; 344 345 sc = dev->si_drv1; 346 if (sc == NULL) 347 return (ENXIO); 348 349 DPRINTF("sc=%p\n", sc); 350 351 mtx_lock(&sc->sc_mtx); 352 if (sc->sc_state.open) { 353 mtx_unlock(&sc->sc_mtx); 354 return (EBUSY); 355 } 356 sc->sc_state.open = true; 357 mtx_unlock(&sc->sc_mtx); 358 359 error = devfs_set_cdevpriv(sc, hidraw_dtor); 360 if (error != 0) { 361 mtx_lock(&sc->sc_mtx); 362 sc->sc_state.open = false; 363 mtx_unlock(&sc->sc_mtx); 364 return (error); 365 } 366 367 sc->sc_q = malloc(sc->sc_rdesc->rdsize * HIDRAW_BUFFER_SIZE, M_DEVBUF, 368 M_ZERO | M_WAITOK); 369 sc->sc_qlen = malloc(sizeof(hid_size_t) * HIDRAW_BUFFER_SIZE, M_DEVBUF, 370 M_ZERO | M_WAITOK); 371 372 /* Set up interrupt pipe. */ 373 sc->sc_state.immed = false; 374 sc->sc_async = 0; 375 sc->sc_state.uhid = false; /* hidraw mode is default */ 376 sc->sc_state.quiet = false; 377 sc->sc_head = sc->sc_tail = 0; 378 sc->sc_fflags = flag; 379 380 hid_intr_start(sc->sc_dev); 381 382 return (0); 383 } 384 385 static void 386 hidraw_dtor(void *data) 387 { 388 struct hidraw_softc *sc = data; 389 390 DPRINTF("sc=%p\n", sc); 391 392 /* Disable interrupts. */ 393 hid_intr_stop(sc->sc_dev); 394 395 sc->sc_tail = sc->sc_head = 0; 396 sc->sc_async = 0; 397 free(sc->sc_q, M_DEVBUF); 398 free(sc->sc_qlen, M_DEVBUF); 399 sc->sc_q = NULL; 400 401 mtx_lock(&sc->sc_mtx); 402 sc->sc_state.open = false; 403 mtx_unlock(&sc->sc_mtx); 404 } 405 406 static int 407 hidraw_read(struct cdev *dev, struct uio *uio, int flag) 408 { 409 struct hidraw_softc *sc; 410 size_t length; 411 int error; 412 413 DPRINTFN(1, "\n"); 414 415 sc = dev->si_drv1; 416 if (sc == NULL) 417 return (EIO); 418 419 mtx_lock(&sc->sc_mtx); 420 error = dev->si_drv1 == NULL ? EIO : hidraw_lock_queue(sc, false); 421 if (error != 0) { 422 mtx_unlock(&sc->sc_mtx); 423 return (error); 424 } 425 426 if (sc->sc_state.immed) { 427 mtx_unlock(&sc->sc_mtx); 428 DPRINTFN(1, "immed\n"); 429 430 error = hid_get_report(sc->sc_dev, sc->sc_q, 431 sc->sc_rdesc->isize, NULL, HID_INPUT_REPORT, 432 sc->sc_rdesc->iid); 433 if (error == 0) 434 error = uiomove(sc->sc_q, sc->sc_rdesc->isize, uio); 435 mtx_lock(&sc->sc_mtx); 436 goto exit; 437 } 438 439 while (sc->sc_tail == sc->sc_head && !sc->sc_state.flush) { 440 if (flag & O_NONBLOCK) { 441 error = EWOULDBLOCK; 442 goto exit; 443 } 444 sc->sc_state.aslp = true; 445 DPRINTFN(5, "sleep on %p\n", &sc->sc_q); 446 error = mtx_sleep(&sc->sc_q, &sc->sc_mtx, PZERO | PCATCH, 447 "hidrawrd", 0); 448 DPRINTFN(5, "woke, error=%d\n", error); 449 if (dev->si_drv1 == NULL) 450 error = EIO; 451 if (error) { 452 sc->sc_state.aslp = false; 453 goto exit; 454 } 455 } 456 457 while (sc->sc_tail != sc->sc_head && uio->uio_resid > 0) { 458 length = min(uio->uio_resid, sc->sc_state.uhid ? 459 sc->sc_rdesc->isize : sc->sc_qlen[sc->sc_head]); 460 mtx_unlock(&sc->sc_mtx); 461 462 /* Copy the data to the user process. */ 463 DPRINTFN(5, "got %lu chars\n", (u_long)length); 464 error = uiomove(sc->sc_q + sc->sc_head * sc->sc_rdesc->rdsize, 465 length, uio); 466 467 mtx_lock(&sc->sc_mtx); 468 if (error != 0) 469 goto exit; 470 /* Remove a small chunk from the input queue. */ 471 sc->sc_head = (sc->sc_head + 1) % HIDRAW_BUFFER_SIZE; 472 /* 473 * In uhid mode transfer as many chunks as possible. Hidraw 474 * packets are transferred one by one due to different length. 475 */ 476 if (!sc->sc_state.uhid) 477 goto exit; 478 } 479 exit: 480 hidraw_unlock_queue(sc); 481 mtx_unlock(&sc->sc_mtx); 482 483 return (error); 484 } 485 486 static int 487 hidraw_write(struct cdev *dev, struct uio *uio, int flag) 488 { 489 uint8_t local_buf[HIDRAW_LOCAL_BUFSIZE], *buf; 490 struct hidraw_softc *sc; 491 int error; 492 int size; 493 size_t buf_offset; 494 uint8_t id = 0; 495 496 DPRINTFN(1, "\n"); 497 498 sc = dev->si_drv1; 499 if (sc == NULL) 500 return (EIO); 501 502 if (sc->sc_rdesc->osize == 0) 503 return (EOPNOTSUPP); 504 505 buf_offset = 0; 506 if (sc->sc_state.uhid) { 507 size = sc->sc_rdesc->osize; 508 if (uio->uio_resid != size) 509 return (EINVAL); 510 } else { 511 size = uio->uio_resid; 512 if (size < 2) 513 return (EINVAL); 514 /* Strip leading 0 if the device doesnt use numbered reports */ 515 error = uiomove(&id, 1, uio); 516 if (error) 517 return (error); 518 if (id != 0) 519 buf_offset++; 520 else 521 size--; 522 /* Check if underlying driver could process this request */ 523 if (size > sc->sc_rdesc->wrsize) 524 return (ENOBUFS); 525 } 526 buf = HIDRAW_LOCAL_ALLOC(local_buf, size); 527 buf[0] = id; 528 error = uiomove(buf + buf_offset, uio->uio_resid, uio); 529 if (error == 0) 530 error = hid_write(sc->sc_dev, buf, size); 531 HIDRAW_LOCAL_FREE(local_buf, buf); 532 533 return (error); 534 } 535 536 #ifdef COMPAT_FREEBSD32 537 static void 538 update_hgd32(const struct hidraw_gen_descriptor *hgd, 539 struct hidraw_gen_descriptor32 *hgd32) 540 { 541 /* Don't update hgd_data pointer */ 542 CP(*hgd, *hgd32, hgd_lang_id); 543 CP(*hgd, *hgd32, hgd_maxlen); 544 CP(*hgd, *hgd32, hgd_actlen); 545 CP(*hgd, *hgd32, hgd_offset); 546 CP(*hgd, *hgd32, hgd_config_index); 547 CP(*hgd, *hgd32, hgd_string_index); 548 CP(*hgd, *hgd32, hgd_iface_index); 549 CP(*hgd, *hgd32, hgd_altif_index); 550 CP(*hgd, *hgd32, hgd_endpt_index); 551 CP(*hgd, *hgd32, hgd_report_type); 552 /* Don't update reserved */ 553 } 554 #endif 555 556 static int 557 hidraw_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, 558 struct thread *td) 559 { 560 uint8_t local_buf[HIDRAW_LOCAL_BUFSIZE]; 561 #ifdef COMPAT_FREEBSD32 562 struct hidraw_gen_descriptor local_hgd; 563 struct hidraw_gen_descriptor32 *hgd32 = NULL; 564 #endif 565 void *buf; 566 struct hidraw_softc *sc; 567 struct hidraw_device_info *hdi; 568 struct hidraw_gen_descriptor *hgd; 569 struct hidraw_report_descriptor *hrd; 570 struct hidraw_devinfo *hd; 571 const char *devname; 572 uint32_t size; 573 int id, len; 574 int error = 0; 575 576 DPRINTFN(2, "cmd=%lx\n", cmd); 577 578 sc = dev->si_drv1; 579 if (sc == NULL) 580 return (EIO); 581 582 hgd = (struct hidraw_gen_descriptor *)addr; 583 584 #ifdef COMPAT_FREEBSD32 585 switch (cmd) { 586 case HIDRAW_GET_REPORT_DESC32: 587 case HIDRAW_GET_REPORT32: 588 case HIDRAW_SET_REPORT_DESC32: 589 case HIDRAW_SET_REPORT32: 590 cmd = _IOC_NEWTYPE(cmd, struct hidraw_gen_descriptor); 591 hgd32 = (struct hidraw_gen_descriptor32 *)addr; 592 hgd = &local_hgd; 593 PTRIN_CP(*hgd32, *hgd, hgd_data); 594 CP(*hgd32, *hgd, hgd_lang_id); 595 CP(*hgd32, *hgd, hgd_maxlen); 596 CP(*hgd32, *hgd, hgd_actlen); 597 CP(*hgd32, *hgd, hgd_offset); 598 CP(*hgd32, *hgd, hgd_config_index); 599 CP(*hgd32, *hgd, hgd_string_index); 600 CP(*hgd32, *hgd, hgd_iface_index); 601 CP(*hgd32, *hgd, hgd_altif_index); 602 CP(*hgd32, *hgd, hgd_endpt_index); 603 CP(*hgd32, *hgd, hgd_report_type); 604 /* Don't copy reserved */ 605 break; 606 } 607 #endif 608 609 /* fixed-length ioctls handling */ 610 switch (cmd) { 611 case FIONBIO: 612 /* All handled in the upper FS layer. */ 613 return (0); 614 615 case FIOASYNC: 616 mtx_lock(&sc->sc_mtx); 617 if (*(int *)addr) { 618 if (sc->sc_async == NULL) { 619 sc->sc_async = td->td_proc; 620 DPRINTF("FIOASYNC %p\n", sc->sc_async); 621 } else 622 error = EBUSY; 623 } else 624 sc->sc_async = NULL; 625 mtx_unlock(&sc->sc_mtx); 626 return (error); 627 628 /* XXX this is not the most general solution. */ 629 case TIOCSPGRP: 630 mtx_lock(&sc->sc_mtx); 631 if (sc->sc_async == NULL) 632 error = EINVAL; 633 else if (*(int *)addr != sc->sc_async->p_pgid) 634 error = EPERM; 635 mtx_unlock(&sc->sc_mtx); 636 return (error); 637 638 case HIDRAW_GET_REPORT_DESC: 639 if (sc->sc_rdesc->data == NULL || sc->sc_rdesc->len == 0) 640 return (EOPNOTSUPP); 641 mtx_lock(&sc->sc_mtx); 642 sc->sc_state.uhid = true; 643 mtx_unlock(&sc->sc_mtx); 644 if (sc->sc_rdesc->len > hgd->hgd_maxlen) { 645 size = hgd->hgd_maxlen; 646 } else { 647 size = sc->sc_rdesc->len; 648 } 649 hgd->hgd_actlen = size; 650 #ifdef COMPAT_FREEBSD32 651 if (hgd32 != NULL) 652 update_hgd32(hgd, hgd32); 653 #endif 654 if (hgd->hgd_data == NULL) 655 return (0); /* descriptor length only */ 656 657 return (copyout(sc->sc_rdesc->data, hgd->hgd_data, size)); 658 659 660 case HIDRAW_SET_REPORT_DESC: 661 if (!(sc->sc_fflags & FWRITE)) 662 return (EPERM); 663 664 /* check privileges */ 665 error = priv_check(curthread, PRIV_DRIVER); 666 if (error) 667 return (error); 668 669 /* Stop interrupts and clear input report buffer */ 670 mtx_lock(&sc->sc_mtx); 671 sc->sc_tail = sc->sc_head = 0; 672 error = hidraw_lock_queue(sc, true); 673 if (error == 0) 674 sc->sc_state.quiet = true; 675 mtx_unlock(&sc->sc_mtx); 676 if (error != 0) 677 return (error); 678 679 buf = HIDRAW_LOCAL_ALLOC(local_buf, hgd->hgd_maxlen); 680 error = copyin(hgd->hgd_data, buf, hgd->hgd_maxlen); 681 if (error == 0) { 682 bus_topo_lock(); 683 error = hid_set_report_descr(sc->sc_dev, buf, 684 hgd->hgd_maxlen); 685 bus_topo_unlock(); 686 } 687 HIDRAW_LOCAL_FREE(local_buf, buf); 688 689 /* Realloc hidraw input queue */ 690 if (error == 0) 691 sc->sc_q = realloc(sc->sc_q, 692 sc->sc_rdesc->rdsize * HIDRAW_BUFFER_SIZE, 693 M_DEVBUF, M_ZERO | M_WAITOK); 694 695 /* Start interrupts again */ 696 mtx_lock(&sc->sc_mtx); 697 sc->sc_state.quiet = false; 698 hidraw_unlock_queue(sc); 699 mtx_unlock(&sc->sc_mtx); 700 return (error); 701 case HIDRAW_SET_IMMED: 702 if (!(sc->sc_fflags & FREAD)) 703 return (EPERM); 704 if (*(int *)addr) { 705 /* XXX should read into ibuf, but does it matter? */ 706 size = sc->sc_rdesc->isize; 707 buf = HIDRAW_LOCAL_ALLOC(local_buf, size); 708 error = hid_get_report(sc->sc_dev, buf, size, NULL, 709 HID_INPUT_REPORT, sc->sc_rdesc->iid); 710 HIDRAW_LOCAL_FREE(local_buf, buf); 711 if (error) 712 return (EOPNOTSUPP); 713 714 mtx_lock(&sc->sc_mtx); 715 sc->sc_state.immed = true; 716 mtx_unlock(&sc->sc_mtx); 717 } else { 718 mtx_lock(&sc->sc_mtx); 719 sc->sc_state.immed = false; 720 mtx_unlock(&sc->sc_mtx); 721 } 722 return (0); 723 724 case HIDRAW_GET_REPORT: 725 if (!(sc->sc_fflags & FREAD)) 726 return (EPERM); 727 switch (hgd->hgd_report_type) { 728 case HID_INPUT_REPORT: 729 size = sc->sc_rdesc->isize; 730 id = sc->sc_rdesc->iid; 731 break; 732 case HID_OUTPUT_REPORT: 733 size = sc->sc_rdesc->osize; 734 id = sc->sc_rdesc->oid; 735 break; 736 case HID_FEATURE_REPORT: 737 size = sc->sc_rdesc->fsize; 738 id = sc->sc_rdesc->fid; 739 break; 740 default: 741 return (EINVAL); 742 } 743 if (id != 0) { 744 error = copyin(hgd->hgd_data, &id, 1); 745 if (error != 0) 746 return (error); 747 } 748 size = MIN(hgd->hgd_maxlen, size); 749 buf = HIDRAW_LOCAL_ALLOC(local_buf, size); 750 error = hid_get_report(sc->sc_dev, buf, size, NULL, 751 hgd->hgd_report_type, id); 752 if (!error) 753 error = copyout(buf, hgd->hgd_data, size); 754 HIDRAW_LOCAL_FREE(local_buf, buf); 755 #ifdef COMPAT_FREEBSD32 756 /* 757 * HIDRAW_GET_REPORT is declared _IOWR, but hgd is not written 758 * so we don't call update_hgd32(). 759 */ 760 #endif 761 return (error); 762 763 case HIDRAW_SET_REPORT: 764 if (!(sc->sc_fflags & FWRITE)) 765 return (EPERM); 766 switch (hgd->hgd_report_type) { 767 case HID_INPUT_REPORT: 768 size = sc->sc_rdesc->isize; 769 id = sc->sc_rdesc->iid; 770 break; 771 case HID_OUTPUT_REPORT: 772 size = sc->sc_rdesc->osize; 773 id = sc->sc_rdesc->oid; 774 break; 775 case HID_FEATURE_REPORT: 776 size = sc->sc_rdesc->fsize; 777 id = sc->sc_rdesc->fid; 778 break; 779 default: 780 return (EINVAL); 781 } 782 size = MIN(hgd->hgd_maxlen, size); 783 buf = HIDRAW_LOCAL_ALLOC(local_buf, size); 784 error = copyin(hgd->hgd_data, buf, size); 785 if (error == 0) { 786 if (id != 0) 787 id = *(uint8_t *)buf; 788 error = hid_set_report(sc->sc_dev, buf, size, 789 hgd->hgd_report_type, id); 790 } 791 HIDRAW_LOCAL_FREE(local_buf, buf); 792 return (error); 793 794 case HIDRAW_GET_REPORT_ID: 795 *(int *)addr = 0; /* XXX: we only support reportid 0? */ 796 return (0); 797 798 case HIDRAW_GET_DEVICEINFO: 799 hdi = (struct hidraw_device_info *)addr; 800 bzero(hdi, sizeof(struct hidraw_device_info)); 801 hdi->hdi_product = sc->sc_hw->idProduct; 802 hdi->hdi_vendor = sc->sc_hw->idVendor; 803 hdi->hdi_version = sc->sc_hw->idVersion; 804 hdi->hdi_bustype = sc->sc_hw->idBus; 805 strlcpy(hdi->hdi_name, sc->sc_hw->name, 806 sizeof(hdi->hdi_name)); 807 strlcpy(hdi->hdi_phys, device_get_nameunit(sc->sc_dev), 808 sizeof(hdi->hdi_phys)); 809 strlcpy(hdi->hdi_uniq, sc->sc_hw->serial, 810 sizeof(hdi->hdi_uniq)); 811 snprintf(hdi->hdi_release, sizeof(hdi->hdi_release), "%x.%02x", 812 sc->sc_hw->idVersion >> 8, sc->sc_hw->idVersion & 0xff); 813 return(0); 814 815 case HIDIOCGRDESCSIZE: 816 *(int *)addr = sc->sc_hw->rdescsize; 817 return (0); 818 819 case HIDIOCGRDESC: 820 hrd = *(struct hidraw_report_descriptor **)addr; 821 error = copyin(&hrd->size, &size, sizeof(uint32_t)); 822 if (error) 823 return (error); 824 /* 825 * HID_MAX_DESCRIPTOR_SIZE-1 is a limit of report descriptor 826 * size in current Linux implementation. 827 */ 828 if (size >= HID_MAX_DESCRIPTOR_SIZE) 829 return (EINVAL); 830 buf = HIDRAW_LOCAL_ALLOC(local_buf, size); 831 error = hid_get_rdesc(sc->sc_dev, buf, size); 832 if (error == 0) { 833 size = MIN(size, sc->sc_rdesc->len); 834 error = copyout(buf, hrd->value, size); 835 } 836 HIDRAW_LOCAL_FREE(local_buf, buf); 837 return (error); 838 839 case HIDIOCGRAWINFO: 840 hd = (struct hidraw_devinfo *)addr; 841 hd->bustype = sc->sc_hw->idBus; 842 hd->vendor = sc->sc_hw->idVendor; 843 hd->product = sc->sc_hw->idProduct; 844 return (0); 845 } 846 847 /* variable-length ioctls handling */ 848 len = IOCPARM_LEN(cmd); 849 switch (IOCBASECMD(cmd)) { 850 case HIDIOCGRAWNAME(0): 851 strlcpy(addr, sc->sc_hw->name, len); 852 td->td_retval[0] = min(strlen(sc->sc_hw->name) + 1, len); 853 return (0); 854 855 case HIDIOCGRAWPHYS(0): 856 devname = device_get_nameunit(sc->sc_dev); 857 strlcpy(addr, devname, len); 858 td->td_retval[0] = min(strlen(devname) + 1, len); 859 return (0); 860 861 case HIDIOCSFEATURE(0): 862 if (!(sc->sc_fflags & FWRITE)) 863 return (EPERM); 864 if (len < 2) 865 return (EINVAL); 866 id = *(uint8_t *)addr; 867 if (id == 0) { 868 addr = (uint8_t *)addr + 1; 869 len--; 870 } 871 return (hid_set_report(sc->sc_dev, addr, len, 872 HID_FEATURE_REPORT, id)); 873 874 case HIDIOCGFEATURE(0): 875 if (!(sc->sc_fflags & FREAD)) 876 return (EPERM); 877 if (len < 2) 878 return (EINVAL); 879 id = *(uint8_t *)addr; 880 if (id == 0) { 881 addr = (uint8_t *)addr + 1; 882 len--; 883 } 884 return (hid_get_report(sc->sc_dev, addr, len, NULL, 885 HID_FEATURE_REPORT, id)); 886 887 case HIDIOCGRAWUNIQ(0): 888 strlcpy(addr, sc->sc_hw->serial, len); 889 td->td_retval[0] = min(strlen(sc->sc_hw->serial) + 1, len); 890 return (0); 891 } 892 893 return (EINVAL); 894 } 895 896 static int 897 hidraw_poll(struct cdev *dev, int events, struct thread *td) 898 { 899 struct hidraw_softc *sc; 900 int revents = 0; 901 902 sc = dev->si_drv1; 903 if (sc == NULL) 904 return (POLLHUP); 905 906 if (events & (POLLOUT | POLLWRNORM) && (sc->sc_fflags & FWRITE)) 907 revents |= events & (POLLOUT | POLLWRNORM); 908 if (events & (POLLIN | POLLRDNORM) && (sc->sc_fflags & FREAD)) { 909 mtx_lock(&sc->sc_mtx); 910 if (sc->sc_head != sc->sc_tail) 911 revents |= events & (POLLIN | POLLRDNORM); 912 else { 913 sc->sc_state.sel = true; 914 selrecord(td, &sc->sc_rsel); 915 } 916 mtx_unlock(&sc->sc_mtx); 917 } 918 919 return (revents); 920 } 921 922 static int 923 hidraw_kqfilter(struct cdev *dev, struct knote *kn) 924 { 925 struct hidraw_softc *sc; 926 927 sc = dev->si_drv1; 928 if (sc == NULL) 929 return (ENXIO); 930 931 switch(kn->kn_filter) { 932 case EVFILT_READ: 933 if (sc->sc_fflags & FREAD) { 934 kn->kn_fop = &hidraw_filterops_read; 935 break; 936 } 937 /* FALLTHROUGH */ 938 default: 939 return(EINVAL); 940 } 941 kn->kn_hook = sc; 942 943 knlist_add(&sc->sc_rsel.si_note, kn, 0); 944 return (0); 945 } 946 947 static int 948 hidraw_kqread(struct knote *kn, long hint) 949 { 950 struct hidraw_softc *sc; 951 int ret; 952 953 sc = kn->kn_hook; 954 955 mtx_assert(&sc->sc_mtx, MA_OWNED); 956 957 if (sc->dev->si_drv1 == NULL) { 958 kn->kn_flags |= EV_EOF; 959 ret = 1; 960 } else 961 ret = (sc->sc_head != sc->sc_tail) ? 1 : 0; 962 963 return (ret); 964 } 965 966 static void 967 hidraw_kqdetach(struct knote *kn) 968 { 969 struct hidraw_softc *sc; 970 971 sc = kn->kn_hook; 972 knlist_remove(&sc->sc_rsel.si_note, kn, 0); 973 } 974 975 static void 976 hidraw_notify(struct hidraw_softc *sc) 977 { 978 979 mtx_assert(&sc->sc_mtx, MA_OWNED); 980 981 if (sc->sc_state.aslp) { 982 sc->sc_state.aslp = false; 983 DPRINTFN(5, "waking %p\n", &sc->sc_q); 984 wakeup(&sc->sc_q); 985 } 986 if (sc->sc_state.sel) { 987 sc->sc_state.sel = false; 988 selwakeuppri(&sc->sc_rsel, PZERO); 989 } 990 if (sc->sc_async != NULL) { 991 DPRINTFN(3, "sending SIGIO %p\n", sc->sc_async); 992 PROC_LOCK(sc->sc_async); 993 kern_psignal(sc->sc_async, SIGIO); 994 PROC_UNLOCK(sc->sc_async); 995 } 996 KNOTE_LOCKED(&sc->sc_rsel.si_note, 0); 997 } 998 999 static device_method_t hidraw_methods[] = { 1000 /* Device interface */ 1001 DEVMETHOD(device_identify, hidraw_identify), 1002 DEVMETHOD(device_probe, hidraw_probe), 1003 DEVMETHOD(device_attach, hidraw_attach), 1004 DEVMETHOD(device_detach, hidraw_detach), 1005 1006 DEVMETHOD_END 1007 }; 1008 1009 static driver_t hidraw_driver = { 1010 "hidraw", 1011 hidraw_methods, 1012 sizeof(struct hidraw_softc) 1013 }; 1014 1015 DRIVER_MODULE(hidraw, hidbus, hidraw_driver, NULL, NULL); 1016 MODULE_DEPEND(hidraw, hidbus, 1, 1, 1); 1017 MODULE_DEPEND(hidraw, hid, 1, 1, 1); 1018 MODULE_VERSION(hidraw, 1); 1019