uhid.c revision 1.21
1 /* $NetBSD: uhid.c,v 1.21 1999/08/23 22:55:14 augustss Exp $ */ 2 3 /* 4 * Copyright (c) 1998 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 (augustss (at) carlstedt.se) 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/data/usbhid10.pdf 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/malloc.h> 48 #if defined(__NetBSD__) || defined(__OpenBSD__) 49 #include <sys/device.h> 50 #include <sys/ioctl.h> 51 #elif defined(__FreeBSD__) 52 #include <sys/ioccom.h> 53 #include <sys/filio.h> 54 #include <sys/module.h> 55 #include <sys/bus.h> 56 #include <sys/ioccom.h> 57 #endif 58 #include <sys/conf.h> 59 #include <sys/tty.h> 60 #include <sys/file.h> 61 #include <sys/select.h> 62 #include <sys/proc.h> 63 #include <sys/vnode.h> 64 #include <sys/poll.h> 65 66 #include <dev/usb/usb.h> 67 #include <dev/usb/usbhid.h> 68 69 #include <dev/usb/usbdi.h> 70 #include <dev/usb/usbdi_util.h> 71 #include <dev/usb/hid.h> 72 #include <dev/usb/usb_quirks.h> 73 74 #ifdef USB_DEBUG 75 #define DPRINTF(x) if (uhiddebug) logprintf x 76 #define DPRINTFN(n,x) if (uhiddebug>(n)) logprintf x 77 int uhiddebug = 0; 78 #else 79 #define DPRINTF(x) 80 #define DPRINTFN(n,x) 81 #endif 82 83 struct uhid_softc { 84 bdevice sc_dev; /* base device */ 85 usbd_interface_handle sc_iface; /* interface */ 86 usbd_pipe_handle sc_intrpipe; /* interrupt pipe */ 87 int sc_ep_addr; 88 89 int sc_isize; 90 int sc_osize; 91 int sc_fsize; 92 u_int8_t sc_iid; 93 u_int8_t sc_oid; 94 u_int8_t sc_fid; 95 96 char *sc_ibuf; 97 char *sc_obuf; 98 99 void *sc_repdesc; 100 int sc_repdesc_size; 101 102 struct clist sc_q; 103 struct selinfo sc_rsel; 104 u_char sc_state; /* driver state */ 105 #define UHID_OPEN 0x01 /* device is open */ 106 #define UHID_ASLP 0x02 /* waiting for device data */ 107 #define UHID_NEEDCLEAR 0x04 /* needs clearing endpoint stall */ 108 #define UHID_IMMED 0x08 /* return read data immediately */ 109 110 int sc_refcnt; 111 u_char sc_dying; 112 }; 113 114 #define UHIDUNIT(dev) (minor(dev)) 115 #define UHID_CHUNK 128 /* chunk size for read */ 116 #define UHID_BSIZE 1020 /* buffer size */ 117 118 #if defined(__NetBSD__) || defined(__OpenBSD__) 119 cdev_decl(uhid); 120 #elif defined(__FreeBSD__) 121 d_open_t uhidopen; 122 d_close_t uhidclose; 123 d_read_t uhidread; 124 d_write_t uhidwrite; 125 d_ioctl_t uhidioctl; 126 d_poll_t uhidpoll; 127 128 #define UHID_CDEV_MAJOR 122 129 130 static struct cdevsw uhid_cdevsw = { 131 /* open */ uhidopen, 132 /* close */ uhidclose, 133 /* read */ uhidread, 134 /* write */ uhidwrite, 135 /* ioctl */ uhidioctl, 136 /* stop */ nostop, 137 /* reset */ noreset, 138 /* devtotty */ nodevtotty, 139 /* poll */ uhidpoll, 140 /* mmap */ nommap, 141 /* strategy */ nostrategy, 142 /* name */ "uhid", 143 /* parms */ noparms, 144 /* maj */ UHID_CDEV_MAJOR, 145 /* dump */ nodump, 146 /* psize */ nopsize, 147 /* flags */ 0, 148 /* maxio */ 0, 149 /* bmaj */ -1 150 }; 151 #endif 152 153 void uhid_intr __P((usbd_request_handle, usbd_private_handle, usbd_status)); 154 155 int uhid_do_read __P((struct uhid_softc *, struct uio *uio, int)); 156 int uhid_do_write __P((struct uhid_softc *, struct uio *uio, int)); 157 int uhid_do_ioctl __P((struct uhid_softc *, u_long, caddr_t, int, struct proc *)); 158 159 USB_DECLARE_DRIVER(uhid); 160 161 USB_MATCH(uhid) 162 { 163 USB_MATCH_START(uhid, uaa); 164 usb_interface_descriptor_t *id; 165 166 if (!uaa->iface) 167 return (UMATCH_NONE); 168 id = usbd_get_interface_descriptor(uaa->iface); 169 if (!id || id->bInterfaceClass != UCLASS_HID) 170 return (UMATCH_NONE); 171 return (UMATCH_IFACECLASS_GENERIC); 172 } 173 174 USB_ATTACH(uhid) 175 { 176 USB_ATTACH_START(uhid, sc, uaa); 177 usbd_interface_handle iface = uaa->iface; 178 usb_interface_descriptor_t *id; 179 usb_endpoint_descriptor_t *ed; 180 int size; 181 void *desc; 182 usbd_status r; 183 char devinfo[1024]; 184 185 sc->sc_iface = iface; 186 id = usbd_get_interface_descriptor(iface); 187 usbd_devinfo(uaa->device, 0, devinfo); 188 USB_ATTACH_SETUP; 189 printf("%s: %s, iclass %d/%d\n", USBDEVNAME(sc->sc_dev), 190 devinfo, id->bInterfaceClass, id->bInterfaceSubClass); 191 192 ed = usbd_interface2endpoint_descriptor(iface, 0); 193 if (!ed) { 194 printf("%s: could not read endpoint descriptor\n", 195 USBDEVNAME(sc->sc_dev)); 196 sc->sc_dying = 1; 197 USB_ATTACH_ERROR_RETURN; 198 } 199 200 DPRINTFN(10,("uhid_attach: bLength=%d bDescriptorType=%d " 201 "bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d" 202 " bInterval=%d\n", 203 ed->bLength, ed->bDescriptorType, 204 ed->bEndpointAddress & UE_ADDR, 205 ed->bEndpointAddress & UE_IN ? "in" : "out", 206 ed->bmAttributes & UE_XFERTYPE, 207 UGETW(ed->wMaxPacketSize), ed->bInterval)); 208 209 if ((ed->bEndpointAddress & UE_IN) != UE_IN || 210 (ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) { 211 printf("%s: unexpected endpoint\n", USBDEVNAME(sc->sc_dev)); 212 sc->sc_dying = 1; 213 USB_ATTACH_ERROR_RETURN; 214 } 215 216 sc->sc_ep_addr = ed->bEndpointAddress; 217 218 desc = 0; 219 r = usbd_alloc_report_desc(uaa->iface, &desc, &size, M_USBDEV); 220 if (r != USBD_NORMAL_COMPLETION) { 221 printf("%s: no report descriptor\n", USBDEVNAME(sc->sc_dev)); 222 sc->sc_dying = 1; 223 if (desc) 224 free(desc, M_USBDEV); 225 USB_ATTACH_ERROR_RETURN; 226 } 227 228 (void)usbd_set_idle(iface, 0, 0); 229 230 sc->sc_isize = hid_report_size(desc, size, hid_input, &sc->sc_iid); 231 sc->sc_osize = hid_report_size(desc, size, hid_output, &sc->sc_oid); 232 sc->sc_fsize = hid_report_size(desc, size, hid_feature, &sc->sc_fid); 233 234 sc->sc_repdesc = desc; 235 sc->sc_repdesc_size = size; 236 237 USB_ATTACH_SUCCESS_RETURN; 238 } 239 240 int 241 uhid_activate(self, act) 242 struct device *self; 243 enum devact act; 244 { 245 struct uhid_softc *sc = (struct uhid_softc *)self; 246 247 switch (act) { 248 case DVACT_ACTIVATE: 249 return (EOPNOTSUPP); 250 break; 251 252 case DVACT_DEACTIVATE: 253 sc->sc_dying = 1; 254 break; 255 } 256 return (0); 257 } 258 259 int 260 uhid_detach(self, flags) 261 struct device *self; 262 int flags; 263 { 264 struct uhid_softc *sc = (struct uhid_softc *)self; 265 int maj, mn; 266 int s; 267 268 DPRINTF(("uhid_detach: sc=%p flags=%d\n", sc, flags)); 269 270 sc->sc_dying = 1; 271 if (sc->sc_intrpipe) 272 usbd_abort_pipe(sc->sc_intrpipe); 273 274 if (sc->sc_state & UHID_OPEN) { 275 s = splusb(); 276 if (--sc->sc_refcnt >= 0) { 277 /* Wake everyone */ 278 wakeup(&sc->sc_q); 279 /* Wait for processes to go away. */ 280 usb_detach_wait(&sc->sc_dev); 281 } 282 splx(s); 283 } 284 285 /* locate the major number */ 286 for (maj = 0; maj < nchrdev; maj++) 287 if (cdevsw[maj].d_open == uhidopen) 288 break; 289 290 /* Nuke the vnodes for any open instances (calls close). */ 291 mn = self->dv_unit; 292 vdevgone(maj, mn, mn, VCHR); 293 294 free(sc->sc_repdesc, M_USBDEV); 295 296 return (0); 297 } 298 299 void 300 uhid_intr(reqh, addr, status) 301 usbd_request_handle reqh; 302 usbd_private_handle addr; 303 usbd_status status; 304 { 305 struct uhid_softc *sc = addr; 306 307 DPRINTFN(5, ("uhid_intr: status=%d\n", status)); 308 DPRINTFN(5, ("uhid_intr: data = %02x %02x %02x\n", 309 sc->sc_ibuf[0], sc->sc_ibuf[1], sc->sc_ibuf[2])); 310 311 if (status == USBD_CANCELLED) 312 return; 313 314 if (status != USBD_NORMAL_COMPLETION) { 315 DPRINTF(("uhid_intr: status=%d\n", status)); 316 sc->sc_state |= UHID_NEEDCLEAR; 317 return; 318 } 319 320 (void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q); 321 322 if (sc->sc_state & UHID_ASLP) { 323 sc->sc_state &= ~UHID_ASLP; 324 DPRINTFN(5, ("uhid_intr: waking %p\n", sc)); 325 wakeup(&sc->sc_q); 326 } 327 selwakeup(&sc->sc_rsel); 328 } 329 330 int 331 uhidopen(dev, flag, mode, p) 332 dev_t dev; 333 int flag; 334 int mode; 335 struct proc *p; 336 { 337 usbd_status r; 338 USB_GET_SC_OPEN(uhid, UHIDUNIT(dev), sc); 339 340 DPRINTF(("uhidopen: sc=%p\n", sc)); 341 342 if (sc->sc_dying) 343 return (ENXIO); 344 345 if (sc->sc_state & UHID_OPEN) 346 return (EBUSY); 347 sc->sc_state |= UHID_OPEN; 348 349 #if defined(__NetBSD__) || defined(__OpenBSD__) 350 if (clalloc(&sc->sc_q, UHID_BSIZE, 0) == -1) { 351 sc->sc_state &= ~UHID_OPEN; 352 return (ENOMEM); 353 } 354 #elif defined(__FreeBSD__) 355 clist_alloc_cblocks(&sc->sc_q, UHID_BSIZE, 0); 356 #endif 357 358 sc->sc_ibuf = malloc(sc->sc_isize, M_USBDEV, M_WAITOK); 359 sc->sc_obuf = malloc(sc->sc_osize, M_USBDEV, M_WAITOK); 360 361 /* Set up interrupt pipe. */ 362 r = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr, 363 USBD_SHORT_XFER_OK, 364 &sc->sc_intrpipe, sc, sc->sc_ibuf, 365 sc->sc_isize, uhid_intr); 366 if (r != USBD_NORMAL_COMPLETION) { 367 DPRINTF(("uhidopen: usbd_open_pipe_intr failed, " 368 "error=%d\n",r)); 369 free(sc->sc_ibuf, M_USBDEV); 370 free(sc->sc_obuf, M_USBDEV); 371 sc->sc_state &= ~UHID_OPEN; 372 return (EIO); 373 } 374 375 sc->sc_state &= ~UHID_IMMED; 376 377 return (0); 378 } 379 380 int 381 uhidclose(dev, flag, mode, p) 382 dev_t dev; 383 int flag; 384 int mode; 385 struct proc *p; 386 { 387 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 388 389 DPRINTF(("uhidclose: sc=%p\n", sc)); 390 391 /* Disable interrupts. */ 392 usbd_abort_pipe(sc->sc_intrpipe); 393 usbd_close_pipe(sc->sc_intrpipe); 394 sc->sc_intrpipe = 0; 395 396 #if defined(__NetBSD__) || defined(__OpenBSD__) 397 clfree(&sc->sc_q); 398 #elif defined(__FreeBSD__) 399 clist_free_cblocks(&sc->sc_q); 400 #endif 401 402 free(sc->sc_ibuf, M_USBDEV); 403 free(sc->sc_obuf, M_USBDEV); 404 405 sc->sc_state &= ~UHID_OPEN; 406 407 return (0); 408 } 409 410 int 411 uhid_do_read(sc, uio, flag) 412 struct uhid_softc *sc; 413 struct uio *uio; 414 int flag; 415 { 416 int s; 417 int error = 0; 418 size_t length; 419 u_char buffer[UHID_CHUNK]; 420 usbd_status r; 421 422 DPRINTFN(1, ("uhidread\n")); 423 if (sc->sc_state & UHID_IMMED) { 424 DPRINTFN(1, ("uhidread immed\n")); 425 426 r = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT, 427 sc->sc_iid, buffer, sc->sc_isize); 428 if (r != USBD_NORMAL_COMPLETION) 429 return (EIO); 430 return (uiomove(buffer, sc->sc_isize, uio)); 431 } 432 433 s = splusb(); 434 while (sc->sc_q.c_cc == 0) { 435 if (flag & IO_NDELAY) { 436 splx(s); 437 return (EWOULDBLOCK); 438 } 439 sc->sc_state |= UHID_ASLP; 440 DPRINTFN(5, ("uhidread: sleep on %p\n", sc)); 441 error = tsleep(&sc->sc_q, PZERO | PCATCH, "uhidrea", 0); 442 DPRINTFN(5, ("uhidread: woke, error=%d\n", error)); 443 if (sc->sc_dying) 444 error = EIO; 445 if (error) { 446 sc->sc_state &= ~UHID_ASLP; 447 break; 448 } 449 if (sc->sc_state & UHID_NEEDCLEAR) { 450 DPRINTFN(-1,("uhidread: clearing stall\n")); 451 sc->sc_state &= ~UHID_NEEDCLEAR; 452 usbd_clear_endpoint_stall(sc->sc_intrpipe); 453 } 454 } 455 splx(s); 456 457 /* Transfer as many chunks as possible. */ 458 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) { 459 length = min(sc->sc_q.c_cc, uio->uio_resid); 460 if (length > sizeof(buffer)) 461 length = sizeof(buffer); 462 463 /* Remove a small chunk from the input queue. */ 464 (void) q_to_b(&sc->sc_q, buffer, length); 465 DPRINTFN(5, ("uhidread: got %d chars\n", length)); 466 467 /* Copy the data to the user process. */ 468 if ((error = uiomove(buffer, length, uio)) != 0) 469 break; 470 } 471 472 return (error); 473 } 474 475 int 476 uhidread(dev, uio, flag) 477 dev_t dev; 478 struct uio *uio; 479 int flag; 480 { 481 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 482 int error; 483 484 sc->sc_refcnt++; 485 error = uhid_do_read(sc, uio, flag); 486 if (--sc->sc_refcnt < 0) 487 usb_detach_wakeup(&sc->sc_dev); 488 return (error); 489 } 490 491 int 492 uhid_do_write(sc, uio, flag) 493 struct uhid_softc *sc; 494 struct uio *uio; 495 int flag; 496 { 497 int error; 498 int size; 499 usbd_status r; 500 501 DPRINTFN(1, ("uhidwrite\n")); 502 503 if (sc->sc_dying) 504 return (EIO); 505 506 size = sc->sc_osize; 507 error = 0; 508 if (uio->uio_resid != size) 509 return (EINVAL); 510 error = uiomove(sc->sc_obuf, size, uio); 511 if (!error) { 512 if (sc->sc_oid) 513 r = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT, 514 sc->sc_obuf[0], 515 sc->sc_obuf+1, size-1); 516 else 517 r = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT, 518 0, sc->sc_obuf, size); 519 if (r != USBD_NORMAL_COMPLETION) { 520 error = EIO; 521 } 522 } 523 524 return (error); 525 } 526 527 int 528 uhidwrite(dev, uio, flag) 529 dev_t dev; 530 struct uio *uio; 531 int flag; 532 { 533 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 534 int error; 535 536 sc->sc_refcnt++; 537 error = uhid_do_write(sc, uio, flag); 538 if (--sc->sc_refcnt < 0) 539 usb_detach_wakeup(&sc->sc_dev); 540 return (error); 541 } 542 543 int 544 uhid_do_ioctl(sc, cmd, addr, flag, p) 545 struct uhid_softc *sc; 546 u_long cmd; 547 caddr_t addr; 548 int flag; 549 struct proc *p; 550 { 551 struct usb_ctl_report_desc *rd; 552 struct usb_ctl_report *re; 553 int size, id; 554 usbd_status r; 555 556 DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd)); 557 558 if (sc->sc_dying) 559 return (EIO); 560 561 switch (cmd) { 562 case FIONBIO: 563 /* All handled in the upper FS layer. */ 564 break; 565 566 case USB_GET_REPORT_DESC: 567 rd = (struct usb_ctl_report_desc *)addr; 568 size = min(sc->sc_repdesc_size, sizeof rd->data); 569 rd->size = size; 570 memcpy(rd->data, sc->sc_repdesc, size); 571 break; 572 573 case USB_SET_IMMED: 574 if (*(int *)addr) { 575 /* XXX should read into ibuf, but does it matter */ 576 r = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT, 577 sc->sc_iid, sc->sc_ibuf, 578 sc->sc_isize); 579 if (r != USBD_NORMAL_COMPLETION) 580 return (EOPNOTSUPP); 581 582 sc->sc_state |= UHID_IMMED; 583 } else 584 sc->sc_state &= ~UHID_IMMED; 585 break; 586 587 case USB_GET_REPORT: 588 re = (struct usb_ctl_report *)addr; 589 switch (re->report) { 590 case UHID_INPUT_REPORT: 591 size = sc->sc_isize; 592 id = sc->sc_iid; 593 break; 594 case UHID_OUTPUT_REPORT: 595 size = sc->sc_osize; 596 id = sc->sc_oid; 597 break; 598 case UHID_FEATURE_REPORT: 599 size = sc->sc_fsize; 600 id = sc->sc_fid; 601 break; 602 default: 603 return (EINVAL); 604 } 605 r = usbd_get_report(sc->sc_iface, re->report, id, 606 re->data, size); 607 if (r != USBD_NORMAL_COMPLETION) 608 return (EIO); 609 break; 610 611 default: 612 return (EINVAL); 613 } 614 return (0); 615 } 616 617 int 618 uhidioctl(dev, cmd, addr, flag, p) 619 dev_t dev; 620 u_long cmd; 621 caddr_t addr; 622 int flag; 623 struct proc *p; 624 { 625 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 626 int error; 627 628 sc->sc_refcnt++; 629 error = uhid_do_ioctl(sc, cmd, addr, flag, p); 630 if (--sc->sc_refcnt < 0) 631 usb_detach_wakeup(&sc->sc_dev); 632 return (error); 633 } 634 635 int 636 uhidpoll(dev, events, p) 637 dev_t dev; 638 int events; 639 struct proc *p; 640 { 641 int revents = 0; 642 int s; 643 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 644 645 if (sc->sc_dying) 646 return (EIO); 647 648 s = splusb(); 649 if (events & (POLLOUT | POLLWRNORM)) 650 revents |= events & (POLLOUT | POLLWRNORM); 651 if (events & (POLLIN | POLLRDNORM)) { 652 if (sc->sc_q.c_cc > 0) 653 revents |= events & (POLLIN | POLLRDNORM); 654 else 655 selrecord(p, &sc->sc_rsel); 656 } 657 658 splx(s); 659 return (revents); 660 } 661 662 #if defined(__FreeBSD__) 663 DEV_DRIVER_MODULE(uhid, uhub, uhid_driver, uhid_devclass, 664 uhid_cdevsw, usbd_driver_load, 0); 665 #endif 666
Indexes created Thu Oct 02 14:10:14 GMT 2025