sys/dev/usbmisc/uhid/uhid.c

   1 /*
   2  * $NetBSD: uhid.c,v 1.46 2001/11/13 06:24:55 lukem Exp $
   3  * $FreeBSD: src/sys/dev/usb/uhid.c,v 1.65 2003/11/09 09:17:22 tanimura Exp $
   4  * $DragonFly: src/sys/dev/usbmisc/uhid/uhid.c,v 1.31 2007/11/05 19:09:43 hasso Exp $
   5  */
   6
   7 /* Also already merged from NetBSD:
   8  *      $NetBSD: uhid.c,v 1.54 2002/09/23 05:51:21 simonb Exp $
   9  */
  10
  11 /*
  12  * Copyright (c) 1998 The NetBSD Foundation, Inc.
  13  * All rights reserved.
  14  *
  15  * This code is derived from software contributed to The NetBSD Foundation
  16  * by Lennart Augustsson (lennart@augustsson.net) at
  17  * Carlstedt Research & Technology.
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions
  21  * are met:
  22  * 1. Redistributions of source code must retain the above copyright
  23  *    notice, this list of conditions and the following disclaimer.
  24  * 2. Redistributions in binary form must reproduce the above copyright
  25  *    notice, this list of conditions and the following disclaimer in the
  26  *    documentation and/or other materials provided with the distribution.
  27  * 3. All advertising materials mentioning features or use of this software
  28  *    must display the following acknowledgement:
  29  *        This product includes software developed by the NetBSD
  30  *        Foundation, Inc. and its contributors.
  31  * 4. Neither the name of The NetBSD Foundation nor the names of its
  32  *    contributors may be used to endorse or promote products derived
  33  *    from this software without specific prior written permission.
  34  *
  35  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  36  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  37  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  38  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  39  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  40  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  41  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  42  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  43  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  44  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  45  * POSSIBILITY OF SUCH DAMAGE.
  46  */
  47
  48 /*
  49  * HID spec: http://www.usb.org/developers/data/usbhid10.pdf
  50  */
  51
  52 #include <sys/param.h>
  53 #include <sys/systm.h>
  54 #include <sys/kernel.h>
  55 #include <sys/lock.h>
  56 #include <sys/malloc.h>
  57 #include <sys/signalvar.h>
  58 #include <sys/ioccom.h>
  59 #include <sys/filio.h>
  60 #include <sys/module.h>
  61 #include <sys/bus.h>
  62 #include <sys/ioccom.h>
  63 #include <sys/conf.h>
  64 #include <sys/tty.h>
  65 #include <sys/select.h>
  66 #include <sys/proc.h>
  67 #include <sys/vnode.h>
  68 #include <sys/poll.h>
  69 #include <sys/sysctl.h>
  70 #include <sys/thread2.h>
  71
  72 #include <bus/usb/usb.h>
  73 #include <bus/usb/usbhid.h>
  74
  75 #include <bus/usb/usbdi.h>
  76 #include <bus/usb/usbdi_util.h>
  77 #include <bus/usb/hid.h>
  78
  79 /* Report descriptor for broken Wacom Graphire */
  80 #include <bus/usb/ugraphire_rdesc.h>
  81
  82 #ifdef USB_DEBUG
  83 #define DPRINTF(x)      if (uhiddebug) kprintf x
  84 #define DPRINTFN(n,x)   if (uhiddebug>(n)) kprintf x
  85 int     uhiddebug = 0;
  86 SYSCTL_NODE(_hw_usb, OID_AUTO, uhid, CTLFLAG_RW, 0, "USB uhid");
  87 SYSCTL_INT(_hw_usb_uhid, OID_AUTO, debug, CTLFLAG_RW,
  88            &uhiddebug, 0, "uhid debug level");
  89 #else
  90 #define DPRINTF(x)
  91 #define DPRINTFN(n,x)
  92 #endif
  93
  94 struct uhid_softc {
  95         device_t sc_dev;                        /* base device */
  96         usbd_device_handle sc_udev;
  97         usbd_interface_handle sc_iface; /* interface */
  98         usbd_pipe_handle sc_intrpipe;   /* interrupt pipe */
  99         int sc_ep_addr;
 100
 101         int sc_isize;
 102         int sc_osize;
 103         int sc_fsize;
 104         u_int8_t sc_iid;
 105         u_int8_t sc_oid;
 106         u_int8_t sc_fid;
 107
 108         u_char *sc_ibuf;
 109         u_char *sc_obuf;
 110
 111         void *sc_repdesc;
 112         int sc_repdesc_size;
 113
 114         struct clist sc_q;
 115         struct selinfo sc_rsel;
 116         struct proc *sc_async;  /* process that wants SIGIO */
 117         u_char sc_state;        /* driver state */
 118 #define UHID_OPEN       0x01    /* device is open */
 119 #define UHID_ASLP       0x02    /* waiting for device data */
 120 #define UHID_NEEDCLEAR  0x04    /* needs clearing endpoint stall */
 121 #define UHID_IMMED      0x08    /* return read data immediately */
 122
 123         int sc_refcnt;
 124         u_char sc_dying;
 125 };
 126
 127 #define UHIDUNIT(dev)   (minor(dev))
 128 #define UHID_CHUNK      128     /* chunk size for read */
 129 #define UHID_BSIZE      1020    /* buffer size */
 130
 131 d_open_t        uhidopen;
 132 d_close_t       uhidclose;
 133 d_read_t        uhidread;
 134 d_write_t       uhidwrite;
 135 d_ioctl_t       uhidioctl;
 136 d_poll_t        uhidpoll;
 137
 138 #define         UHID_CDEV_MAJOR 122
 139
 140 static struct dev_ops uhid_ops = {
 141         { "uhid", UHID_CDEV_MAJOR, 0 },
 142         .d_open =       uhidopen,
 143         .d_close =      uhidclose,
 144         .d_read =       uhidread,
 145         .d_write =      uhidwrite,
 146         .d_ioctl =      uhidioctl,
 147         .d_poll =       uhidpoll,
 148 };
 149
 150 static void uhid_intr(usbd_xfer_handle, usbd_private_handle,
 151                            usbd_status);
 152
 153 static int uhid_do_read(struct uhid_softc *, struct uio *uio, int);
 154 static int uhid_do_write(struct uhid_softc *, struct uio *uio, int);
 155 static int uhid_do_ioctl(struct uhid_softc *, u_long, caddr_t, int);
 156
 157 static device_probe_t uhid_match;
 158 static device_attach_t uhid_attach;
 159 static device_detach_t uhid_detach;
 160
 161 static devclass_t uhid_devclass;
 162
 163 static kobj_method_t uhid_methods[] = {
 164         DEVMETHOD(device_probe, uhid_match),
 165         DEVMETHOD(device_attach, uhid_attach),
 166         DEVMETHOD(device_detach, uhid_detach),
 167         {0,0}
 168 };
 169
 170 static driver_t uhid_driver = {
 171         "uhid",
 172         uhid_methods,
 173         sizeof(struct uhid_softc)
 174 };
 175
 176 MODULE_DEPEND(uhid, usb, 1, 1, 1);
 177
 178 static int
 179 uhid_match(device_t self)
 180 {
 181         struct usb_attach_arg *uaa = device_get_ivars(self);
 182         usb_interface_descriptor_t *id;
 183
 184         if (uaa->iface == NULL)
 185                 return (UMATCH_NONE);
 186         id = usbd_get_interface_descriptor(uaa->iface);
 187         if (id == NULL || id->bInterfaceClass != UICLASS_HID)
 188                 return (UMATCH_NONE);
 189         if (uaa->matchlvl)
 190                 return (uaa->matchlvl);
 191         return (UMATCH_IFACECLASS_GENERIC);
 192 }
 193
 194 static int
 195 uhid_attach(device_t self)
 196 {
 197         struct uhid_softc *sc = device_get_softc(self);
 198         struct usb_attach_arg *uaa = device_get_ivars(self);
 199         usbd_interface_handle iface = uaa->iface;
 200         usb_interface_descriptor_t *id;
 201         usb_endpoint_descriptor_t *ed;
 202         int size;
 203         void *desc;
 204         usbd_status err;
 205         char devinfo[1024];
 206
 207         sc->sc_udev = uaa->device;
 208         sc->sc_iface = iface;
 209         id = usbd_get_interface_descriptor(iface);
 210         usbd_devinfo(uaa->device, 0, devinfo);
 211         sc->sc_dev = self;
 212         device_set_desc_copy(self, devinfo);
 213         kprintf("%s: %s, iclass %d/%d\n", device_get_nameunit(sc->sc_dev),
 214                devinfo, id->bInterfaceClass, id->bInterfaceSubClass);
 215
 216         ed = usbd_interface2endpoint_descriptor(iface, 0);
 217         if (ed == NULL) {
 218                 kprintf("%s: could not read endpoint descriptor\n",
 219                        device_get_nameunit(sc->sc_dev));
 220                 sc->sc_dying = 1;
 221                 return ENXIO;
 222         }
 223
 224         DPRINTFN(10,("uhid_attach: bLength=%d bDescriptorType=%d "
 225                      "bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d"
 226                      " bInterval=%d\n",
 227                      ed->bLength, ed->bDescriptorType,
 228                      ed->bEndpointAddress & UE_ADDR,
 229                      UE_GET_DIR(ed->bEndpointAddress)==UE_DIR_IN? "in" : "out",
 230                      ed->bmAttributes & UE_XFERTYPE,
 231                      UGETW(ed->wMaxPacketSize), ed->bInterval));
 232
 233         if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN ||
 234             (ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
 235                 kprintf("%s: unexpected endpoint\n", device_get_nameunit(sc->sc_dev));
 236                 sc->sc_dying = 1;
 237                 return ENXIO;
 238         }
 239
 240         sc->sc_ep_addr = ed->bEndpointAddress;
 241
 242         /* The report descriptor for the Wacom Graphire is broken. */
 243         if (uaa->vendor == 0x056a && uaa->product == 0x0010 /* &&
 244             uaa->revision == 0x???? */) { /* XXX should use revision */
 245                 size = sizeof uhid_graphire_report_descr;
 246                 desc = kmalloc(size, M_USBDEV, M_INTWAIT);
 247                 err = USBD_NORMAL_COMPLETION;
 248                 memcpy(desc, uhid_graphire_report_descr, size);
 249         } else {
 250                 desc = NULL;
 251                 err = usbd_read_report_desc(uaa->iface, &desc, &size,M_USBDEV);
 252         }
 253
 254         if (err) {
 255                 kprintf("%s: no report descriptor\n", device_get_nameunit(sc->sc_dev));
 256                 sc->sc_dying = 1;
 257                 return ENXIO;
 258         }
 259
 260         (void)usbd_set_idle(iface, 0, 0);
 261
 262         sc->sc_isize = hid_report_size(desc, size, hid_input,   &sc->sc_iid);
 263         sc->sc_osize = hid_report_size(desc, size, hid_output,  &sc->sc_oid);
 264         sc->sc_fsize = hid_report_size(desc, size, hid_feature, &sc->sc_fid);
 265
 266         sc->sc_repdesc = desc;
 267         sc->sc_repdesc_size = size;
 268
 269         dev_ops_add(&uhid_ops, -1, device_get_unit(self));
 270         make_dev(&uhid_ops, device_get_unit(self),
 271                 UID_ROOT, GID_OPERATOR,
 272                 0644, "uhid%d", device_get_unit(self));
 273
 274         return 0;
 275 }
 276
 277 static int
 278 uhid_detach(device_t self)
 279 {
 280         struct uhid_softc *sc = device_get_softc(self);
 281
 282         DPRINTF(("uhid_detach: sc=%p\n", sc));
 283
 284         sc->sc_dying = 1;
 285         if (sc->sc_intrpipe != NULL)
 286                 usbd_abort_pipe(sc->sc_intrpipe);
 287
 288         if (sc->sc_state & UHID_OPEN) {
 289                 crit_enter();
 290                 if (--sc->sc_refcnt >= 0) {
 291                         /* Wake everyone */
 292                         wakeup(&sc->sc_q);
 293                         /* Wait for processes to go away. */
 294                         usb_detach_wait(sc->sc_dev);
 295                 }
 296                 crit_exit();
 297         }
 298
 299         dev_ops_remove(&uhid_ops, -1, device_get_unit(self));
 300
 301         if (sc->sc_repdesc)
 302                 kfree(sc->sc_repdesc, M_USBDEV);
 303
 304         return (0);
 305 }
 306
 307 void
 308 uhid_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
 309 {
 310         struct uhid_softc *sc = addr;
 311
 312 #ifdef USB_DEBUG
 313         if (uhiddebug > 5) {
 314                 u_int32_t cc, i;
 315
 316                 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
 317                 DPRINTF(("uhid_intr: status=%d cc=%d\n", status, cc));
 318                 DPRINTF(("uhid_intr: data ="));
 319                 for (i = 0; i < cc; i++)
 320                         DPRINTF((" %02x", sc->sc_ibuf[i]));
 321                 DPRINTF(("\n"));
 322         }
 323 #endif
 324
 325         if (status == USBD_CANCELLED)
 326                 return;
 327
 328         if (status != USBD_NORMAL_COMPLETION) {
 329                 DPRINTF(("uhid_intr: status=%d\n", status));
 330                 if (status == USBD_STALLED)
 331                     sc->sc_state |= UHID_NEEDCLEAR;
 332                 return;
 333         }
 334
 335         (void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q);
 336
 337         if (sc->sc_state & UHID_ASLP) {
 338                 sc->sc_state &= ~UHID_ASLP;
 339                 DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q));
 340                 wakeup(&sc->sc_q);
 341         }
 342         selwakeup(&sc->sc_rsel);
 343         if (sc->sc_async != NULL) {
 344                 DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n", sc->sc_async));
 345                 ksignal(sc->sc_async, SIGIO);
 346         }
 347 }
 348
 349 int
 350 uhidopen(struct dev_open_args *ap)
 351 {
 352         cdev_t dev = ap->a_head.a_dev;
 353         struct uhid_softc *sc;
 354         usbd_status err;
 355
 356         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 357         if (sc == NULL)
 358                 return (ENXIO);
 359
 360         DPRINTF(("uhidopen: sc=%p\n", sc));
 361
 362         if (sc->sc_dying)
 363                 return (ENXIO);
 364
 365         if (sc->sc_state & UHID_OPEN)
 366                 return (EBUSY);
 367         sc->sc_state |= UHID_OPEN;
 368
 369         if ((clist_alloc_cblocks(&sc->sc_q, UHID_BSIZE,
 370                                  UHID_BSIZE), 0) == -1) {
 371                 sc->sc_state &= ~UHID_OPEN;
 372                 return (ENOMEM);
 373         }
 374
 375         sc->sc_ibuf = kmalloc(sc->sc_isize, M_USBDEV, M_WAITOK);
 376         sc->sc_obuf = kmalloc(sc->sc_osize, M_USBDEV, M_WAITOK);
 377
 378         /* Set up interrupt pipe. */
 379         err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr,
 380                   USBD_SHORT_XFER_OK, &sc->sc_intrpipe, sc, sc->sc_ibuf,
 381                   sc->sc_isize, uhid_intr, USBD_DEFAULT_INTERVAL);
 382         if (err) {
 383                 DPRINTF(("uhidopen: usbd_open_pipe_intr failed, "
 384                          "error=%d\n",err));
 385                 kfree(sc->sc_ibuf, M_USBDEV);
 386                 kfree(sc->sc_obuf, M_USBDEV);
 387                 sc->sc_ibuf = sc->sc_obuf = NULL;
 388
 389                 sc->sc_state &= ~UHID_OPEN;
 390                 return (EIO);
 391         }
 392
 393         sc->sc_state &= ~UHID_IMMED;
 394
 395         sc->sc_async = 0;
 396
 397         return (0);
 398 }
 399
 400 int
 401 uhidclose(struct dev_close_args *ap)
 402 {
 403         cdev_t dev = ap->a_head.a_dev;
 404         struct uhid_softc *sc;
 405
 406         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 407
 408         DPRINTF(("uhidclose: sc=%p\n", sc));
 409
 410         /* Disable interrupts. */
 411         usbd_abort_pipe(sc->sc_intrpipe);
 412         usbd_close_pipe(sc->sc_intrpipe);
 413         sc->sc_intrpipe = 0;
 414
 415         ndflush(&sc->sc_q, sc->sc_q.c_cc);
 416         clist_free_cblocks(&sc->sc_q);
 417
 418         kfree(sc->sc_ibuf, M_USBDEV);
 419         kfree(sc->sc_obuf, M_USBDEV);
 420         sc->sc_ibuf = sc->sc_obuf = NULL;
 421
 422         sc->sc_state &= ~UHID_OPEN;
 423
 424         sc->sc_async = 0;
 425
 426         return (0);
 427 }
 428
 429 int
 430 uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag)
 431 {
 432         int error = 0;
 433         size_t length;
 434         u_char buffer[UHID_CHUNK];
 435         usbd_status err;
 436
 437         DPRINTFN(1, ("uhidread\n"));
 438         if (sc->sc_state & UHID_IMMED) {
 439                 DPRINTFN(1, ("uhidread immed\n"));
 440
 441                 err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 442                           sc->sc_iid, buffer, sc->sc_isize);
 443                 if (err)
 444                         return (EIO);
 445                 return (uiomove(buffer, sc->sc_isize, uio));
 446         }
 447
 448         crit_enter();
 449         while (sc->sc_q.c_cc == 0) {
 450                 if (flag & IO_NDELAY) {
 451                         crit_exit();
 452                         return (EWOULDBLOCK);
 453                 }
 454                 sc->sc_state |= UHID_ASLP;
 455                 DPRINTFN(5, ("uhidread: sleep on %p\n", &sc->sc_q));
 456                 error = tsleep(&sc->sc_q, PCATCH, "uhidrea", 0);
 457                 DPRINTFN(5, ("uhidread: woke, error=%d\n", error));
 458                 if (sc->sc_dying)
 459                         error = EIO;
 460                 if (error) {
 461                         sc->sc_state &= ~UHID_ASLP;
 462                         break;
 463                 }
 464                 if (sc->sc_state & UHID_NEEDCLEAR) {
 465                         DPRINTFN(-1,("uhidread: clearing stall\n"));
 466                         sc->sc_state &= ~UHID_NEEDCLEAR;
 467                         usbd_clear_endpoint_stall(sc->sc_intrpipe);
 468                 }
 469         }
 470         crit_exit();
 471
 472         /* Transfer as many chunks as possible. */
 473         while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) {
 474                 length = min(sc->sc_q.c_cc, uio->uio_resid);
 475                 if (length > sizeof(buffer))
 476                         length = sizeof(buffer);
 477
 478                 /* Remove a small chunk from the input queue. */
 479                 (void) q_to_b(&sc->sc_q, buffer, length);
 480                 DPRINTFN(5, ("uhidread: got %lu chars\n", (u_long)length));
 481
 482                 /* Copy the data to the user process. */
 483                 if ((error = uiomove(buffer, length, uio)) != 0)
 484                         break;
 485         }
 486
 487         return (error);
 488 }
 489
 490 int
 491 uhidread(struct dev_read_args *ap)
 492 {
 493         cdev_t dev = ap->a_head.a_dev;
 494         struct uhid_softc *sc;
 495         int error;
 496
 497         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 498
 499         sc->sc_refcnt++;
 500         error = uhid_do_read(sc, ap->a_uio, ap->a_ioflag);
 501         if (--sc->sc_refcnt < 0)
 502                 usb_detach_wakeup(sc->sc_dev);
 503         return (error);
 504 }
 505
 506 int
 507 uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag)
 508 {
 509         int error;
 510         int size;
 511         usbd_status err;
 512
 513         DPRINTFN(1, ("uhidwrite\n"));
 514
 515         if (sc->sc_dying)
 516                 return (EIO);
 517
 518         size = sc->sc_osize;
 519         error = 0;
 520         if (uio->uio_resid != size)
 521                 return (EINVAL);
 522         error = uiomove(sc->sc_obuf, size, uio);
 523         if (!error) {
 524                 if (sc->sc_oid)
 525                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 526                                   sc->sc_obuf[0], sc->sc_obuf+1, size-1);
 527                 else
 528                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 529                                   0, sc->sc_obuf, size);
 530                 if (err)
 531                         error = EIO;
 532         }
 533
 534         return (error);
 535 }
 536
 537 int
 538 uhidwrite(struct dev_write_args *ap)
 539 {
 540         cdev_t dev = ap->a_head.a_dev;
 541         struct uhid_softc *sc;
 542         int error;
 543
 544         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 545
 546         sc->sc_refcnt++;
 547         error = uhid_do_write(sc, ap->a_uio, ap->a_ioflag);
 548         if (--sc->sc_refcnt < 0)
 549                 usb_detach_wakeup(sc->sc_dev);
 550         return (error);
 551 }
 552
 553 int
 554 uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, caddr_t addr, int flag)
 555 {
 556         struct usb_ctl_report_desc *rd;
 557         struct usb_ctl_report *re;
 558         int size, id;
 559         usbd_status err;
 560
 561         DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd));
 562
 563         if (sc->sc_dying)
 564                 return (EIO);
 565
 566         switch (cmd) {
 567         case FIOASYNC:
 568                 if (*(int *)addr) {
 569                         if (sc->sc_async != NULL)
 570                                 return (EBUSY);
 571                         sc->sc_async = curproc;
 572                         DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n", sc->sc_async));
 573                 } else
 574                         sc->sc_async = NULL;
 575                 break;
 576
 577         /* XXX this is not the most general solution. */
 578         case TIOCSPGRP:
 579                 if (sc->sc_async == NULL)
 580                         return (EINVAL);
 581                 if (*(int *)addr != sc->sc_async->p_pgid)
 582                         return (EPERM);
 583                 break;
 584
 585         case USB_GET_REPORT_DESC:
 586                 rd = (struct usb_ctl_report_desc *)addr;
 587                 size = min(sc->sc_repdesc_size, sizeof rd->ucrd_data);
 588                 rd->ucrd_size = size;
 589                 memcpy(rd->ucrd_data, sc->sc_repdesc, size);
 590                 break;
 591
 592         case USB_SET_IMMED:
 593                 if (*(int *)addr) {
 594                         /* XXX should read into ibuf, but does it matter? */
 595                         err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 596                                   sc->sc_iid, sc->sc_ibuf, sc->sc_isize);
 597                         if (err)
 598                                 return (EOPNOTSUPP);
 599
 600                         sc->sc_state |=  UHID_IMMED;
 601                 } else
 602                         sc->sc_state &= ~UHID_IMMED;
 603                 break;
 604
 605         case USB_GET_REPORT:
 606                 re = (struct usb_ctl_report *)addr;
 607                 switch (re->ucr_report) {
 608                 case UHID_INPUT_REPORT:
 609                         size = sc->sc_isize;
 610                         id = sc->sc_iid;
 611                         break;
 612                 case UHID_OUTPUT_REPORT:
 613                         size = sc->sc_osize;
 614                         id = sc->sc_oid;
 615                         break;
 616                 case UHID_FEATURE_REPORT:
 617                         size = sc->sc_fsize;
 618                         id = sc->sc_fid;
 619                         break;
 620                 default:
 621                         return (EINVAL);
 622                 }
 623                 err = usbd_get_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 624                           size);
 625                 if (err)
 626                         return (EIO);
 627                 break;
 628
 629         case USB_SET_REPORT:
 630                 re = (struct usb_ctl_report *)addr;
 631                 switch (re->ucr_report) {
 632                 case UHID_INPUT_REPORT:
 633                         size = sc->sc_isize;
 634                         id = sc->sc_iid;
 635                         break;
 636                 case UHID_OUTPUT_REPORT:
 637                         size = sc->sc_osize;
 638                         id = sc->sc_oid;
 639                         break;
 640                 case UHID_FEATURE_REPORT:
 641                         size = sc->sc_fsize;
 642                         id = sc->sc_fid;
 643                         break;
 644                 default:
 645                         return (EINVAL);
 646                 }
 647                 err = usbd_set_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 648                           size);
 649                 if (err)
 650                         return (EIO);
 651                 break;
 652
 653         case USB_GET_REPORT_ID:
 654                 *(int *)addr = 0;       /* XXX: we only support reportid 0? */
 655                 break;
 656
 657         default:
 658                 return (EINVAL);
 659         }
 660         return (0);
 661 }
 662
 663 int
 664 uhidioctl(struct dev_ioctl_args *ap)
 665 {
 666         cdev_t dev = ap->a_head.a_dev;
 667         struct uhid_softc *sc;
 668         int error;
 669
 670         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 671
 672         sc->sc_refcnt++;
 673         error = uhid_do_ioctl(sc, ap->a_cmd, ap->a_data, ap->a_fflag);
 674         if (--sc->sc_refcnt < 0)
 675                 usb_detach_wakeup(sc->sc_dev);
 676         return (error);
 677 }
 678
 679 int
 680 uhidpoll(struct dev_poll_args *ap)
 681 {
 682         cdev_t dev = ap->a_head.a_dev;
 683         struct uhid_softc *sc;
 684         int revents = 0;
 685
 686         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 687
 688         if (sc->sc_dying)
 689                 return (EIO);
 690
 691         crit_enter();
 692         if (ap->a_events & (POLLOUT | POLLWRNORM))
 693                 revents |= ap->a_events & (POLLOUT | POLLWRNORM);
 694         if (ap->a_events & (POLLIN | POLLRDNORM)) {
 695                 if (sc->sc_q.c_cc > 0)
 696                         revents |= ap->a_events & (POLLIN | POLLRDNORM);
 697                 else
 698                         selrecord(curthread, &sc->sc_rsel);
 699         }
 700         crit_exit();
 701         ap->a_events = revents;
 702         return (0);
 703 }
 704
 705 DRIVER_MODULE(uhid, uhub, uhid_driver, uhid_devclass, usbd_driver_load, 0);
 706