uhid.c revision 1.75
1 /* $NetBSD: uhid.c,v 1.75 2007/02/26 13:28:56 drochner Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2004 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. 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * HID spec: http://www.usb.org/developers/devclass_docs/HID1_11.pdf 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: uhid.c,v 1.75 2007/02/26 13:28:56 drochner Exp $"); 46 47 #include "opt_compat_netbsd.h" 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/kernel.h> 52 #include <sys/malloc.h> 53 #include <sys/signalvar.h> 54 #include <sys/device.h> 55 #include <sys/ioctl.h> 56 #include <sys/conf.h> 57 #include <sys/tty.h> 58 #include <sys/file.h> 59 #include <sys/select.h> 60 #include <sys/proc.h> 61 #include <sys/vnode.h> 62 #include <sys/poll.h> 63 64 #include <dev/usb/usb.h> 65 #include <dev/usb/usbhid.h> 66 67 #include <dev/usb/usbdevs.h> 68 #include <dev/usb/usbdi.h> 69 #include <dev/usb/usbdi_util.h> 70 #include <dev/usb/hid.h> 71 #include <dev/usb/usb_quirks.h> 72 73 #include <dev/usb/uhidev.h> 74 75 #ifdef UHID_DEBUG 76 #define DPRINTF(x) if (uhiddebug) logprintf x 77 #define DPRINTFN(n,x) if (uhiddebug>(n)) logprintf 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 int sc_isize; 88 int sc_osize; 89 int sc_fsize; 90 91 u_char *sc_obuf; 92 93 struct clist sc_q; 94 struct selinfo sc_rsel; 95 usb_proc_ptr sc_async; /* process that wants SIGIO */ 96 u_char sc_state; /* driver state */ 97 #define UHID_ASLP 0x01 /* waiting for device data */ 98 #define UHID_IMMED 0x02 /* return read data immediately */ 99 100 int sc_refcnt; 101 u_char sc_dying; 102 }; 103 104 #define UHIDUNIT(dev) (minor(dev)) 105 #define UHID_CHUNK 128 /* chunk size for read */ 106 #define UHID_BSIZE 1020 /* buffer size */ 107 108 dev_type_open(uhidopen); 109 dev_type_close(uhidclose); 110 dev_type_read(uhidread); 111 dev_type_write(uhidwrite); 112 dev_type_ioctl(uhidioctl); 113 dev_type_poll(uhidpoll); 114 dev_type_kqfilter(uhidkqfilter); 115 116 const struct cdevsw uhid_cdevsw = { 117 uhidopen, uhidclose, uhidread, uhidwrite, uhidioctl, 118 nostop, notty, uhidpoll, nommap, uhidkqfilter, D_OTHER, 119 }; 120 121 Static void uhid_intr(struct uhidev *, void *, u_int len); 122 123 Static int uhid_do_read(struct uhid_softc *, struct uio *uio, int); 124 Static int uhid_do_write(struct uhid_softc *, struct uio *uio, int); 125 Static int uhid_do_ioctl(struct uhid_softc*, u_long, caddr_t, int, struct lwp *); 126 127 USB_DECLARE_DRIVER(uhid); 128 129 int 130 uhid_match(struct device *parent, struct cfdata *match, 131 void *aux) 132 { 133 #ifdef UHID_DEBUG 134 struct uhidev_attach_arg *uha = aux; 135 #endif 136 137 DPRINTF(("uhid_match: report=%d\n", uha->reportid)); 138 139 if (match->cf_flags & 1) 140 return (UMATCH_HIGHEST); 141 else 142 return (UMATCH_IFACECLASS_GENERIC); 143 } 144 145 void 146 uhid_attach(struct device *parent, struct device *self, void *aux) 147 { 148 struct uhid_softc *sc = (struct uhid_softc *)self; 149 struct uhidev_attach_arg *uha = aux; 150 int size, repid; 151 void *desc; 152 153 sc->sc_hdev.sc_intr = uhid_intr; 154 sc->sc_hdev.sc_parent = uha->parent; 155 sc->sc_hdev.sc_report_id = uha->reportid; 156 157 uhidev_get_report_desc(uha->parent, &desc, &size); 158 repid = uha->reportid; 159 sc->sc_isize = hid_report_size(desc, size, hid_input, repid); 160 sc->sc_osize = hid_report_size(desc, size, hid_output, repid); 161 sc->sc_fsize = hid_report_size(desc, size, hid_feature, repid); 162 163 printf(": input=%d, output=%d, feature=%d\n", 164 sc->sc_isize, sc->sc_osize, sc->sc_fsize); 165 166 USB_ATTACH_SUCCESS_RETURN; 167 } 168 169 int 170 uhid_activate(device_ptr_t self, enum devact act) 171 { 172 struct uhid_softc *sc = (struct uhid_softc *)self; 173 174 switch (act) { 175 case DVACT_ACTIVATE: 176 return (EOPNOTSUPP); 177 178 case DVACT_DEACTIVATE: 179 sc->sc_dying = 1; 180 break; 181 } 182 return (0); 183 } 184 185 int 186 uhid_detach(struct device *self, int flags) 187 { 188 struct uhid_softc *sc = (struct uhid_softc *)self; 189 int s; 190 int maj, mn; 191 192 DPRINTF(("uhid_detach: sc=%p flags=%d\n", sc, flags)); 193 194 sc->sc_dying = 1; 195 196 if (sc->sc_hdev.sc_state & UHIDEV_OPEN) { 197 s = splusb(); 198 if (--sc->sc_refcnt >= 0) { 199 /* Wake everyone */ 200 wakeup(&sc->sc_q); 201 /* Wait for processes to go away. */ 202 usb_detach_wait(USBDEV(sc->sc_hdev.sc_dev)); 203 } 204 splx(s); 205 } 206 207 /* locate the major number */ 208 #if defined(__NetBSD__) 209 maj = cdevsw_lookup_major(&uhid_cdevsw); 210 #elif defined(__OpenBSD__) 211 for (maj = 0; maj < nchrdev; maj++) 212 if (cdevsw[maj].d_open == uhidopen) 213 break; 214 #endif 215 216 /* Nuke the vnodes for any open instances (calls close). */ 217 mn = device_unit(self); 218 vdevgone(maj, mn, mn, VCHR); 219 220 #if 0 221 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, 222 sc->sc_hdev.sc_parent->sc_udev, 223 USBDEV(sc->sc_hdev.sc_dev)); 224 #endif 225 226 return (0); 227 } 228 229 void 230 uhid_intr(struct uhidev *addr, void *data, u_int len) 231 { 232 struct uhid_softc *sc = (struct uhid_softc *)addr; 233 234 #ifdef UHID_DEBUG 235 if (uhiddebug > 5) { 236 u_int32_t i; 237 238 DPRINTF(("uhid_intr: data =")); 239 for (i = 0; i < len; i++) 240 DPRINTF((" %02x", ((u_char *)data)[i])); 241 DPRINTF(("\n")); 242 } 243 #endif 244 245 (void)b_to_q(data, len, &sc->sc_q); 246 247 if (sc->sc_state & UHID_ASLP) { 248 sc->sc_state &= ~UHID_ASLP; 249 DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q)); 250 wakeup(&sc->sc_q); 251 } 252 selnotify(&sc->sc_rsel, 0); 253 if (sc->sc_async != NULL) { 254 DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n", sc->sc_async)); 255 mutex_enter(&proclist_mutex); 256 psignal(sc->sc_async, SIGIO); 257 mutex_exit(&proclist_mutex); 258 } 259 } 260 261 int 262 uhidopen(dev_t dev, int flag, int mode, 263 struct lwp *l) 264 { 265 struct uhid_softc *sc; 266 int error; 267 268 USB_GET_SC_OPEN(uhid, UHIDUNIT(dev), sc); 269 270 DPRINTF(("uhidopen: sc=%p\n", sc)); 271 272 if (sc->sc_dying) 273 return (ENXIO); 274 275 error = uhidev_open(&sc->sc_hdev); 276 if (error) 277 return (error); 278 279 if (clalloc(&sc->sc_q, UHID_BSIZE, 0) == -1) { 280 uhidev_close(&sc->sc_hdev); 281 return (ENOMEM); 282 } 283 sc->sc_obuf = malloc(sc->sc_osize, M_USBDEV, M_WAITOK); 284 sc->sc_state &= ~UHID_IMMED; 285 sc->sc_async = NULL; 286 287 return (0); 288 } 289 290 int 291 uhidclose(dev_t dev, int flag, int mode, 292 struct lwp *l) 293 { 294 struct uhid_softc *sc; 295 296 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 297 298 DPRINTF(("uhidclose: sc=%p\n", sc)); 299 300 clfree(&sc->sc_q); 301 free(sc->sc_obuf, M_USBDEV); 302 sc->sc_async = NULL; 303 uhidev_close(&sc->sc_hdev); 304 305 return (0); 306 } 307 308 int 309 uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag) 310 { 311 int s; 312 int error = 0; 313 int extra; 314 size_t length; 315 u_char buffer[UHID_CHUNK]; 316 usbd_status err; 317 318 DPRINTFN(1, ("uhidread\n")); 319 if (sc->sc_state & UHID_IMMED) { 320 DPRINTFN(1, ("uhidread immed\n")); 321 extra = sc->sc_hdev.sc_report_id != 0; 322 err = uhidev_get_report(&sc->sc_hdev, UHID_INPUT_REPORT, 323 buffer, sc->sc_isize + extra); 324 if (err) 325 return (EIO); 326 return (uiomove(buffer+extra, sc->sc_isize, uio)); 327 } 328 329 s = splusb(); 330 while (sc->sc_q.c_cc == 0) { 331 if (flag & IO_NDELAY) { 332 splx(s); 333 return (EWOULDBLOCK); 334 } 335 sc->sc_state |= UHID_ASLP; 336 DPRINTFN(5, ("uhidread: sleep on %p\n", &sc->sc_q)); 337 error = tsleep(&sc->sc_q, PZERO | PCATCH, "uhidrea", 0); 338 DPRINTFN(5, ("uhidread: woke, error=%d\n", error)); 339 if (sc->sc_dying) 340 error = EIO; 341 if (error) { 342 sc->sc_state &= ~UHID_ASLP; 343 break; 344 } 345 } 346 splx(s); 347 348 /* Transfer as many chunks as possible. */ 349 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) { 350 length = min(sc->sc_q.c_cc, uio->uio_resid); 351 if (length > sizeof(buffer)) 352 length = sizeof(buffer); 353 354 /* Remove a small chunk from the input queue. */ 355 (void) q_to_b(&sc->sc_q, buffer, length); 356 DPRINTFN(5, ("uhidread: got %lu chars\n", (u_long)length)); 357 358 /* Copy the data to the user process. */ 359 if ((error = uiomove(buffer, length, uio)) != 0) 360 break; 361 } 362 363 return (error); 364 } 365 366 int 367 uhidread(dev_t dev, struct uio *uio, int flag) 368 { 369 struct uhid_softc *sc; 370 int error; 371 372 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 373 374 sc->sc_refcnt++; 375 error = uhid_do_read(sc, uio, flag); 376 if (--sc->sc_refcnt < 0) 377 usb_detach_wakeup(USBDEV(sc->sc_hdev.sc_dev)); 378 return (error); 379 } 380 381 int 382 uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag) 383 { 384 int error; 385 int size; 386 usbd_status err; 387 388 DPRINTFN(1, ("uhidwrite\n")); 389 390 if (sc->sc_dying) 391 return (EIO); 392 393 size = sc->sc_osize; 394 error = 0; 395 if (uio->uio_resid != size) 396 return (EINVAL); 397 error = uiomove(sc->sc_obuf, size, uio); 398 if (!error) { 399 err = uhidev_set_report(&sc->sc_hdev, UHID_OUTPUT_REPORT, 400 sc->sc_obuf, size); 401 if (err) 402 error = EIO; 403 } 404 405 return (error); 406 } 407 408 int 409 uhidwrite(dev_t dev, struct uio *uio, int flag) 410 { 411 struct uhid_softc *sc; 412 int error; 413 414 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 415 416 sc->sc_refcnt++; 417 error = uhid_do_write(sc, uio, flag); 418 if (--sc->sc_refcnt < 0) 419 usb_detach_wakeup(USBDEV(sc->sc_hdev.sc_dev)); 420 return (error); 421 } 422 423 int 424 uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, caddr_t addr, 425 int flag, struct lwp *l) 426 { 427 struct usb_ctl_report_desc *rd; 428 struct usb_ctl_report *re; 429 u_char buffer[UHID_CHUNK]; 430 int size, extra; 431 usbd_status err; 432 void *desc; 433 434 DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd)); 435 436 if (sc->sc_dying) 437 return (EIO); 438 439 switch (cmd) { 440 case FIONBIO: 441 /* All handled in the upper FS layer. */ 442 break; 443 444 case FIOASYNC: 445 if (*(int *)addr) { 446 if (sc->sc_async != NULL) 447 return (EBUSY); 448 sc->sc_async = l->l_proc; 449 DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n", l->l_proc)); 450 } else 451 sc->sc_async = NULL; 452 break; 453 454 /* XXX this is not the most general solution. */ 455 case TIOCSPGRP: 456 if (sc->sc_async == NULL) 457 return (EINVAL); 458 if (*(int *)addr != sc->sc_async->p_pgid) 459 return (EPERM); 460 break; 461 462 case FIOSETOWN: 463 if (sc->sc_async == NULL) 464 return (EINVAL); 465 if (-*(int *)addr != sc->sc_async->p_pgid 466 && *(int *)addr != sc->sc_async->p_pid) 467 return (EPERM); 468 break; 469 470 case USB_GET_REPORT_DESC: 471 uhidev_get_report_desc(sc->sc_hdev.sc_parent, &desc, &size); 472 rd = (struct usb_ctl_report_desc *)addr; 473 size = min(size, sizeof rd->ucrd_data); 474 rd->ucrd_size = size; 475 memcpy(rd->ucrd_data, desc, size); 476 break; 477 478 case USB_SET_IMMED: 479 if (*(int *)addr) { 480 extra = sc->sc_hdev.sc_report_id != 0; 481 err = uhidev_get_report(&sc->sc_hdev, UHID_INPUT_REPORT, 482 buffer, sc->sc_isize + extra); 483 if (err) 484 return (EOPNOTSUPP); 485 486 sc->sc_state |= UHID_IMMED; 487 } else 488 sc->sc_state &= ~UHID_IMMED; 489 break; 490 491 case USB_GET_REPORT: 492 re = (struct usb_ctl_report *)addr; 493 switch (re->ucr_report) { 494 case UHID_INPUT_REPORT: 495 size = sc->sc_isize; 496 break; 497 case UHID_OUTPUT_REPORT: 498 size = sc->sc_osize; 499 break; 500 case UHID_FEATURE_REPORT: 501 size = sc->sc_fsize; 502 break; 503 default: 504 return (EINVAL); 505 } 506 extra = sc->sc_hdev.sc_report_id != 0; 507 err = uhidev_get_report(&sc->sc_hdev, re->ucr_report, 508 re->ucr_data, size + extra); 509 if (extra) 510 memcpy(re->ucr_data, re->ucr_data+1, size); 511 if (err) 512 return (EIO); 513 break; 514 515 case USB_SET_REPORT: 516 re = (struct usb_ctl_report *)addr; 517 switch (re->ucr_report) { 518 case UHID_INPUT_REPORT: 519 size = sc->sc_isize; 520 break; 521 case UHID_OUTPUT_REPORT: 522 size = sc->sc_osize; 523 break; 524 case UHID_FEATURE_REPORT: 525 size = sc->sc_fsize; 526 break; 527 default: 528 return (EINVAL); 529 } 530 err = uhidev_set_report(&sc->sc_hdev, re->ucr_report, 531 re->ucr_data, size); 532 if (err) 533 return (EIO); 534 break; 535 536 case USB_GET_REPORT_ID: 537 *(int *)addr = sc->sc_hdev.sc_report_id; 538 break; 539 540 case USB_GET_DEVICEINFO: 541 usbd_fill_deviceinfo(sc->sc_hdev.sc_parent->sc_udev, 542 (struct usb_device_info *)addr, 0); 543 break; 544 #ifdef COMPAT_30 545 case USB_GET_DEVICEINFO_OLD: 546 usbd_fill_deviceinfo_old(sc->sc_hdev.sc_parent->sc_udev, 547 (struct usb_device_info_old *)addr, 0); 548 549 break; 550 #endif 551 case USB_GET_STRING_DESC: 552 { 553 struct usb_string_desc *si = (struct usb_string_desc *)addr; 554 err = usbd_get_string_desc(sc->sc_hdev.sc_parent->sc_udev, 555 si->usd_string_index, 556 si->usd_language_id, &si->usd_desc, &size); 557 if (err) 558 return (EINVAL); 559 break; 560 } 561 562 default: 563 return (EINVAL); 564 } 565 return (0); 566 } 567 568 int 569 uhidioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct lwp *l) 570 { 571 struct uhid_softc *sc; 572 int error; 573 574 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 575 576 sc->sc_refcnt++; 577 error = uhid_do_ioctl(sc, cmd, addr, flag, l); 578 if (--sc->sc_refcnt < 0) 579 usb_detach_wakeup(USBDEV(sc->sc_hdev.sc_dev)); 580 return (error); 581 } 582 583 int 584 uhidpoll(dev_t dev, int events, struct lwp *l) 585 { 586 struct uhid_softc *sc; 587 int revents = 0; 588 int s; 589 590 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 591 592 if (sc->sc_dying) 593 return (POLLHUP); 594 595 s = splusb(); 596 if (events & (POLLOUT | POLLWRNORM)) 597 revents |= events & (POLLOUT | POLLWRNORM); 598 if (events & (POLLIN | POLLRDNORM)) { 599 if (sc->sc_q.c_cc > 0) 600 revents |= events & (POLLIN | POLLRDNORM); 601 else 602 selrecord(l, &sc->sc_rsel); 603 } 604 605 splx(s); 606 return (revents); 607 } 608 609 static void 610 filt_uhidrdetach(struct knote *kn) 611 { 612 struct uhid_softc *sc = kn->kn_hook; 613 int s; 614 615 s = splusb(); 616 SLIST_REMOVE(&sc->sc_rsel.sel_klist, kn, knote, kn_selnext); 617 splx(s); 618 } 619 620 static int 621 filt_uhidread(struct knote *kn, long hint) 622 { 623 struct uhid_softc *sc = kn->kn_hook; 624 625 kn->kn_data = sc->sc_q.c_cc; 626 return (kn->kn_data > 0); 627 } 628 629 static const struct filterops uhidread_filtops = 630 { 1, NULL, filt_uhidrdetach, filt_uhidread }; 631 632 static const struct filterops uhid_seltrue_filtops = 633 { 1, NULL, filt_uhidrdetach, filt_seltrue }; 634 635 int 636 uhidkqfilter(dev_t dev, struct knote *kn) 637 { 638 struct uhid_softc *sc; 639 struct klist *klist; 640 int s; 641 642 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 643 644 if (sc->sc_dying) 645 return (EIO); 646 647 switch (kn->kn_filter) { 648 case EVFILT_READ: 649 klist = &sc->sc_rsel.sel_klist; 650 kn->kn_fop = &uhidread_filtops; 651 break; 652 653 case EVFILT_WRITE: 654 klist = &sc->sc_rsel.sel_klist; 655 kn->kn_fop = &uhid_seltrue_filtops; 656 break; 657 658 default: 659 return (1); 660 } 661 662 kn->kn_hook = sc; 663 664 s = splusb(); 665 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 666 splx(s); 667 668 return (0); 669 } 670
Indexes created Wed Sep 24 02:09:48 GMT 2025