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 1.33 2008/08/14 20:55:53 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/filio.h>
  59 #include <sys/module.h>
  60 #include <sys/bus.h>
  61 #include <sys/conf.h>
  62 #include <sys/tty.h>
  63 #include <sys/proc.h>
  64 #include <sys/vnode.h>
  65 #include <sys/event.h>
  66 #include <sys/sysctl.h>
  67 #include <sys/thread2.h>
  68
  69 #include <bus/usb/usb.h>
  70 #include <bus/usb/usbhid.h>
  71
  72 #include <bus/usb/usbdi.h>
  73 #include <bus/usb/usbdi_util.h>
  74 #include <bus/usb/hid.h>
  75
  76 /* Report descriptor for broken Wacom Graphire */
  77 #include <bus/usb/ugraphire_rdesc.h>
  78
  79 #ifdef USB_DEBUG
  80 #define DPRINTF(x)      if (uhiddebug) kprintf x
  81 #define DPRINTFN(n,x)   if (uhiddebug>(n)) kprintf x
  82 int     uhiddebug = 0;
  83 SYSCTL_NODE(_hw_usb, OID_AUTO, uhid, CTLFLAG_RW, 0, "USB uhid");
  84 SYSCTL_INT(_hw_usb_uhid, OID_AUTO, debug, CTLFLAG_RW,
  85            &uhiddebug, 0, "uhid debug level");
  86 #else
  87 #define DPRINTF(x)
  88 #define DPRINTFN(n,x)
  89 #endif
  90
  91 struct uhid_softc {
  92         device_t sc_dev;                        /* base device */
  93         usbd_device_handle sc_udev;
  94         usbd_interface_handle sc_iface; /* interface */
  95         usbd_pipe_handle sc_intrpipe;   /* interrupt pipe */
  96         int sc_ep_addr;
  97
  98         int sc_isize;
  99         int sc_osize;
 100         int sc_fsize;
 101         u_int8_t sc_iid;
 102         u_int8_t sc_oid;
 103         u_int8_t sc_fid;
 104
 105         u_char *sc_ibuf;
 106         u_char *sc_obuf;
 107
 108         void *sc_repdesc;
 109         int sc_repdesc_size;
 110
 111         struct clist sc_q;
 112         struct kqinfo sc_rkq;
 113         struct proc *sc_async;  /* process that wants SIGIO */
 114         u_char sc_state;        /* driver state */
 115 #define UHID_OPEN       0x01    /* device is open */
 116 #define UHID_ASLP       0x02    /* waiting for device data */
 117 #define UHID_NEEDCLEAR  0x04    /* needs clearing endpoint stall */
 118 #define UHID_IMMED      0x08    /* return read data immediately */
 119
 120         int sc_refcnt;
 121         u_char sc_dying;
 122 };
 123
 124 #define UHIDUNIT(dev)   (minor(dev))
 125 #define UHID_CHUNK      128     /* chunk size for read */
 126 #define UHID_BSIZE      1020    /* buffer size */
 127
 128 d_open_t        uhidopen;
 129 d_close_t       uhidclose;
 130 d_read_t        uhidread;
 131 d_write_t       uhidwrite;
 132 d_ioctl_t       uhidioctl;
 133 d_kqfilter_t    uhidkqfilter;
 134
 135 static void uhidfilt_detach(struct knote *);
 136 static int uhidfilt_read(struct knote *, long);
 137 static int uhidfilt_write(struct knote *, long);
 138
 139 #define         UHID_CDEV_MAJOR 122
 140
 141 static struct dev_ops uhid_ops = {
 142         { "uhid", UHID_CDEV_MAJOR, D_KQFILTER },
 143         .d_open =       uhidopen,
 144         .d_close =      uhidclose,
 145         .d_read =       uhidread,
 146         .d_write =      uhidwrite,
 147         .d_ioctl =      uhidioctl,
 148         .d_kqfilter =   uhidkqfilter
 149 };
 150
 151 static void uhid_intr(usbd_xfer_handle, usbd_private_handle,
 152                            usbd_status);
 153
 154 static int uhid_do_read(struct uhid_softc *, struct uio *uio, int);
 155 static int uhid_do_write(struct uhid_softc *, struct uio *uio, int);
 156 static int uhid_do_ioctl(struct uhid_softc *, u_long, caddr_t, int);
 157
 158 static device_probe_t uhid_match;
 159 static device_attach_t uhid_attach;
 160 static device_detach_t uhid_detach;
 161
 162 static devclass_t uhid_devclass;
 163
 164 static kobj_method_t uhid_methods[] = {
 165         DEVMETHOD(device_probe, uhid_match),
 166         DEVMETHOD(device_attach, uhid_attach),
 167         DEVMETHOD(device_detach, uhid_detach),
 168         {0,0}
 169 };
 170
 171 static driver_t uhid_driver = {
 172         "uhid",
 173         uhid_methods,
 174         sizeof(struct uhid_softc)
 175 };
 176
 177 MODULE_DEPEND(uhid, usb, 1, 1, 1);
 178
 179 static int
 180 uhid_match(device_t self)
 181 {
 182         struct usb_attach_arg *uaa = device_get_ivars(self);
 183         usb_interface_descriptor_t *id;
 184
 185         if (uaa->iface == NULL)
 186                 return (UMATCH_NONE);
 187         id = usbd_get_interface_descriptor(uaa->iface);
 188         if (id == NULL || id->bInterfaceClass != UICLASS_HID)
 189                 return (UMATCH_NONE);
 190         if (uaa->matchlvl)
 191                 return (uaa->matchlvl);
 192         return (UMATCH_IFACECLASS_GENERIC);
 193 }
 194
 195 static int
 196 uhid_attach(device_t self)
 197 {
 198         struct uhid_softc *sc = device_get_softc(self);
 199         struct usb_attach_arg *uaa = device_get_ivars(self);
 200         usbd_interface_handle iface = uaa->iface;
 201         usb_endpoint_descriptor_t *ed;
 202         int size;
 203         void *desc;
 204         usbd_status err;
 205
 206         sc->sc_udev = uaa->device;
 207         sc->sc_iface = iface;
 208         sc->sc_dev = self;
 209
 210         ed = usbd_interface2endpoint_descriptor(iface, 0);
 211         if (ed == NULL) {
 212                 kprintf("%s: could not read endpoint descriptor\n",
 213                        device_get_nameunit(sc->sc_dev));
 214                 sc->sc_dying = 1;
 215                 return ENXIO;
 216         }
 217
 218         DPRINTFN(10,("uhid_attach: bLength=%d bDescriptorType=%d "
 219                      "bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d"
 220                      " bInterval=%d\n",
 221                      ed->bLength, ed->bDescriptorType,
 222                      ed->bEndpointAddress & UE_ADDR,
 223                      UE_GET_DIR(ed->bEndpointAddress)==UE_DIR_IN? "in" : "out",
 224                      ed->bmAttributes & UE_XFERTYPE,
 225                      UGETW(ed->wMaxPacketSize), ed->bInterval));
 226
 227         if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN ||
 228             (ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
 229                 kprintf("%s: unexpected endpoint\n", device_get_nameunit(sc->sc_dev));
 230                 sc->sc_dying = 1;
 231                 return ENXIO;
 232         }
 233
 234         sc->sc_ep_addr = ed->bEndpointAddress;
 235
 236         /* The report descriptor for the Wacom Graphire is broken. */
 237         if (uaa->vendor == 0x056a && uaa->product == 0x0010 /* &&
 238             uaa->revision == 0x???? */) { /* XXX should use revision */
 239                 size = sizeof uhid_graphire_report_descr;
 240                 desc = kmalloc(size, M_USBDEV, M_INTWAIT);
 241                 err = USBD_NORMAL_COMPLETION;
 242                 memcpy(desc, uhid_graphire_report_descr, size);
 243         } else {
 244                 desc = NULL;
 245                 err = usbd_read_report_desc(uaa->iface, &desc, &size,M_USBDEV);
 246         }
 247
 248         if (err) {
 249                 kprintf("%s: no report descriptor\n", device_get_nameunit(sc->sc_dev));
 250                 sc->sc_dying = 1;
 251                 return ENXIO;
 252         }
 253
 254         (void)usbd_set_idle(iface, 0, 0);
 255
 256         sc->sc_isize = hid_report_size(desc, size, hid_input,   &sc->sc_iid);
 257         sc->sc_osize = hid_report_size(desc, size, hid_output,  &sc->sc_oid);
 258         sc->sc_fsize = hid_report_size(desc, size, hid_feature, &sc->sc_fid);
 259
 260         sc->sc_repdesc = desc;
 261         sc->sc_repdesc_size = size;
 262
 263         make_dev(&uhid_ops, device_get_unit(self),
 264                  UID_ROOT, GID_OPERATOR,
 265                  0644, "uhid%d", device_get_unit(self));
 266
 267         return 0;
 268 }
 269
 270 static int
 271 uhid_detach(device_t self)
 272 {
 273         struct uhid_softc *sc = device_get_softc(self);
 274
 275         DPRINTF(("uhid_detach: sc=%p\n", sc));
 276
 277         sc->sc_dying = 1;
 278         if (sc->sc_intrpipe != NULL)
 279                 usbd_abort_pipe(sc->sc_intrpipe);
 280
 281         if (sc->sc_state & UHID_OPEN) {
 282                 crit_enter();
 283                 if (--sc->sc_refcnt >= 0) {
 284                         /* Wake everyone */
 285                         wakeup(&sc->sc_q);
 286                         /* Wait for processes to go away. */
 287                         usb_detach_wait(sc->sc_dev);
 288                 }
 289                 crit_exit();
 290         }
 291
 292         dev_ops_remove_minor(&uhid_ops, device_get_unit(self));
 293
 294         if (sc->sc_repdesc)
 295                 kfree(sc->sc_repdesc, M_USBDEV);
 296
 297         return (0);
 298 }
 299
 300 void
 301 uhid_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
 302 {
 303         struct uhid_softc *sc = addr;
 304
 305 #ifdef USB_DEBUG
 306         if (uhiddebug > 5) {
 307                 u_int32_t cc, i;
 308
 309                 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
 310                 DPRINTF(("uhid_intr: status=%d cc=%d\n", status, cc));
 311                 DPRINTF(("uhid_intr: data ="));
 312                 for (i = 0; i < cc; i++)
 313                         DPRINTF((" %02x", sc->sc_ibuf[i]));
 314                 DPRINTF(("\n"));
 315         }
 316 #endif
 317
 318         if (status == USBD_CANCELLED)
 319                 return;
 320
 321         if (status != USBD_NORMAL_COMPLETION) {
 322                 DPRINTF(("uhid_intr: status=%d\n", status));
 323                 if (status == USBD_STALLED)
 324                     sc->sc_state |= UHID_NEEDCLEAR;
 325                 return;
 326         }
 327
 328         (void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q);
 329
 330         if (sc->sc_state & UHID_ASLP) {
 331                 sc->sc_state &= ~UHID_ASLP;
 332                 DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q));
 333                 wakeup(&sc->sc_q);
 334         }
 335         KNOTE(&sc->sc_rkq.ki_note, 0);
 336         if (sc->sc_async != NULL) {
 337                 DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n", sc->sc_async));
 338                 ksignal(sc->sc_async, SIGIO);
 339         }
 340 }
 341
 342 int
 343 uhidopen(struct dev_open_args *ap)
 344 {
 345         cdev_t dev = ap->a_head.a_dev;
 346         struct uhid_softc *sc;
 347         usbd_status err;
 348
 349         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 350         if (sc == NULL)
 351                 return (ENXIO);
 352
 353         DPRINTF(("uhidopen: sc=%p\n", sc));
 354
 355         if (sc->sc_dying)
 356                 return (ENXIO);
 357
 358         if (sc->sc_state & UHID_OPEN)
 359                 return (EBUSY);
 360         sc->sc_state |= UHID_OPEN;
 361
 362         if ((clist_alloc_cblocks(&sc->sc_q, UHID_BSIZE,
 363                                  UHID_BSIZE), 0) == -1) {
 364                 sc->sc_state &= ~UHID_OPEN;
 365                 return (ENOMEM);
 366         }
 367
 368         sc->sc_ibuf = kmalloc(sc->sc_isize, M_USBDEV, M_WAITOK);
 369         sc->sc_obuf = kmalloc(sc->sc_osize, M_USBDEV, M_WAITOK);
 370
 371         /* Set up interrupt pipe. */
 372         err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr,
 373                   USBD_SHORT_XFER_OK, &sc->sc_intrpipe, sc, sc->sc_ibuf,
 374                   sc->sc_isize, uhid_intr, USBD_DEFAULT_INTERVAL);
 375         if (err) {
 376                 DPRINTF(("uhidopen: usbd_open_pipe_intr failed, "
 377                          "error=%d\n",err));
 378                 kfree(sc->sc_ibuf, M_USBDEV);
 379                 kfree(sc->sc_obuf, M_USBDEV);
 380                 sc->sc_ibuf = sc->sc_obuf = NULL;
 381
 382                 sc->sc_state &= ~UHID_OPEN;
 383                 return (EIO);
 384         }
 385
 386         sc->sc_state &= ~UHID_IMMED;
 387
 388         sc->sc_async = 0;
 389
 390         return (0);
 391 }
 392
 393 int
 394 uhidclose(struct dev_close_args *ap)
 395 {
 396         cdev_t dev = ap->a_head.a_dev;
 397         struct uhid_softc *sc;
 398
 399         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 400
 401         DPRINTF(("uhidclose: sc=%p\n", sc));
 402
 403         /* Disable interrupts. */
 404         usbd_abort_pipe(sc->sc_intrpipe);
 405         usbd_close_pipe(sc->sc_intrpipe);
 406         sc->sc_intrpipe = 0;
 407
 408         ndflush(&sc->sc_q, sc->sc_q.c_cc);
 409         clist_free_cblocks(&sc->sc_q);
 410
 411         kfree(sc->sc_ibuf, M_USBDEV);
 412         kfree(sc->sc_obuf, M_USBDEV);
 413         sc->sc_ibuf = sc->sc_obuf = NULL;
 414
 415         sc->sc_state &= ~UHID_OPEN;
 416
 417         sc->sc_async = 0;
 418
 419         return (0);
 420 }
 421
 422 int
 423 uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag)
 424 {
 425         int error = 0;
 426         size_t length;
 427         u_char buffer[UHID_CHUNK];
 428         usbd_status err;
 429
 430         DPRINTFN(1, ("uhidread\n"));
 431         if (sc->sc_state & UHID_IMMED) {
 432                 DPRINTFN(1, ("uhidread immed\n"));
 433
 434                 err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 435                           sc->sc_iid, buffer, sc->sc_isize);
 436                 if (err)
 437                         return (EIO);
 438                 return (uiomove(buffer, sc->sc_isize, uio));
 439         }
 440
 441         crit_enter();
 442         while (sc->sc_q.c_cc == 0) {
 443                 if (flag & IO_NDELAY) {
 444                         crit_exit();
 445                         return (EWOULDBLOCK);
 446                 }
 447                 sc->sc_state |= UHID_ASLP;
 448                 DPRINTFN(5, ("uhidread: sleep on %p\n", &sc->sc_q));
 449                 error = tsleep(&sc->sc_q, PCATCH, "uhidrea", 0);
 450                 DPRINTFN(5, ("uhidread: woke, error=%d\n", error));
 451                 if (sc->sc_dying)
 452                         error = EIO;
 453                 if (error) {
 454                         sc->sc_state &= ~UHID_ASLP;
 455                         break;
 456                 }
 457                 if (sc->sc_state & UHID_NEEDCLEAR) {
 458                         DPRINTFN(-1,("uhidread: clearing stall\n"));
 459                         sc->sc_state &= ~UHID_NEEDCLEAR;
 460                         usbd_clear_endpoint_stall(sc->sc_intrpipe);
 461                 }
 462         }
 463         crit_exit();
 464
 465         /* Transfer as many chunks as possible. */
 466         while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) {
 467                 length = szmin(sc->sc_q.c_cc, uio->uio_resid);
 468                 if (length > sizeof(buffer))
 469                         length = sizeof(buffer);
 470
 471                 /* Remove a small chunk from the input queue. */
 472                 (void) q_to_b(&sc->sc_q, buffer, length);
 473                 DPRINTFN(5, ("uhidread: got %lu chars\n", (u_long)length));
 474
 475                 /* Copy the data to the user process. */
 476                 if ((error = uiomove(buffer, length, uio)) != 0)
 477                         break;
 478         }
 479
 480         return (error);
 481 }
 482
 483 int
 484 uhidread(struct dev_read_args *ap)
 485 {
 486         cdev_t dev = ap->a_head.a_dev;
 487         struct uhid_softc *sc;
 488         int error;
 489
 490         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 491
 492         sc->sc_refcnt++;
 493         error = uhid_do_read(sc, ap->a_uio, ap->a_ioflag);
 494         if (--sc->sc_refcnt < 0)
 495                 usb_detach_wakeup(sc->sc_dev);
 496         return (error);
 497 }
 498
 499 int
 500 uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag)
 501 {
 502         int error;
 503         int size;
 504         usbd_status err;
 505
 506         DPRINTFN(1, ("uhidwrite\n"));
 507
 508         if (sc->sc_dying)
 509                 return (EIO);
 510
 511         size = sc->sc_osize;
 512         if (uio->uio_resid != size)
 513                 return (EINVAL);
 514         error = uiomove(sc->sc_obuf, size, uio);
 515         if (!error) {
 516                 if (sc->sc_oid)
 517                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 518                                   sc->sc_obuf[0], sc->sc_obuf+1, size-1);
 519                 else
 520                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 521                                   0, sc->sc_obuf, size);
 522                 if (err)
 523                         error = EIO;
 524         }
 525
 526         return (error);
 527 }
 528
 529 int
 530 uhidwrite(struct dev_write_args *ap)
 531 {
 532         cdev_t dev = ap->a_head.a_dev;
 533         struct uhid_softc *sc;
 534         int error;
 535
 536         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 537
 538         sc->sc_refcnt++;
 539         error = uhid_do_write(sc, ap->a_uio, ap->a_ioflag);
 540         if (--sc->sc_refcnt < 0)
 541                 usb_detach_wakeup(sc->sc_dev);
 542         return (error);
 543 }
 544
 545 int
 546 uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, caddr_t addr, int flag)
 547 {
 548         struct usb_ctl_report_desc *rd;
 549         struct usb_ctl_report *re;
 550         int size, id;
 551         usbd_status err;
 552
 553         DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd));
 554
 555         if (sc->sc_dying)
 556                 return (EIO);
 557
 558         switch (cmd) {
 559         case FIOASYNC:
 560                 if (*(int *)addr) {
 561                         if (sc->sc_async != NULL)
 562                                 return (EBUSY);
 563                         sc->sc_async = curproc;
 564                         DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n", sc->sc_async));
 565                 } else
 566                         sc->sc_async = NULL;
 567                 break;
 568
 569         /* XXX this is not the most general solution. */
 570         case TIOCSPGRP:
 571                 if (sc->sc_async == NULL)
 572                         return (EINVAL);
 573                 if (*(int *)addr != sc->sc_async->p_pgid)
 574                         return (EPERM);
 575                 break;
 576
 577         case USB_GET_REPORT_DESC:
 578                 rd = (struct usb_ctl_report_desc *)addr;
 579                 size = min(sc->sc_repdesc_size, sizeof rd->ucrd_data);
 580                 rd->ucrd_size = size;
 581                 memcpy(rd->ucrd_data, sc->sc_repdesc, size);
 582                 break;
 583
 584         case USB_SET_IMMED:
 585                 if (*(int *)addr) {
 586                         /* XXX should read into ibuf, but does it matter? */
 587                         err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 588                                   sc->sc_iid, sc->sc_ibuf, sc->sc_isize);
 589                         if (err)
 590                                 return (EOPNOTSUPP);
 591
 592                         sc->sc_state |=  UHID_IMMED;
 593                 } else
 594                         sc->sc_state &= ~UHID_IMMED;
 595                 break;
 596
 597         case USB_GET_REPORT:
 598                 re = (struct usb_ctl_report *)addr;
 599                 switch (re->ucr_report) {
 600                 case UHID_INPUT_REPORT:
 601                         size = sc->sc_isize;
 602                         id = sc->sc_iid;
 603                         break;
 604                 case UHID_OUTPUT_REPORT:
 605                         size = sc->sc_osize;
 606                         id = sc->sc_oid;
 607                         break;
 608                 case UHID_FEATURE_REPORT:
 609                         size = sc->sc_fsize;
 610                         id = sc->sc_fid;
 611                         break;
 612                 default:
 613                         return (EINVAL);
 614                 }
 615                 err = usbd_get_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 616                           size);
 617                 if (err)
 618                         return (EIO);
 619                 break;
 620
 621         case USB_SET_REPORT:
 622                 re = (struct usb_ctl_report *)addr;
 623                 switch (re->ucr_report) {
 624                 case UHID_INPUT_REPORT:
 625                         size = sc->sc_isize;
 626                         id = sc->sc_iid;
 627                         break;
 628                 case UHID_OUTPUT_REPORT:
 629                         size = sc->sc_osize;
 630                         id = sc->sc_oid;
 631                         break;
 632                 case UHID_FEATURE_REPORT:
 633                         size = sc->sc_fsize;
 634                         id = sc->sc_fid;
 635                         break;
 636                 default:
 637                         return (EINVAL);
 638                 }
 639                 err = usbd_set_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 640                           size);
 641                 if (err)
 642                         return (EIO);
 643                 break;
 644
 645         case USB_GET_REPORT_ID:
 646                 *(int *)addr = 0;       /* XXX: we only support reportid 0? */
 647                 break;
 648
 649         default:
 650                 return (EINVAL);
 651         }
 652         return (0);
 653 }
 654
 655 int
 656 uhidioctl(struct dev_ioctl_args *ap)
 657 {
 658         cdev_t dev = ap->a_head.a_dev;
 659         struct uhid_softc *sc;
 660         int error;
 661
 662         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 663
 664         sc->sc_refcnt++;
 665         error = uhid_do_ioctl(sc, ap->a_cmd, ap->a_data, ap->a_fflag);
 666         if (--sc->sc_refcnt < 0)
 667                 usb_detach_wakeup(sc->sc_dev);
 668         return (error);
 669 }
 670
 671 static struct filterops uhidfiltops_read =
 672         { 1, NULL, uhidfilt_detach, uhidfilt_read };
 673 static struct filterops uhidfiltops_write =
 674         { 1, NULL, uhidfilt_detach, uhidfilt_write };
 675
 676 int
 677 uhidkqfilter(struct dev_kqfilter_args *ap)
 678 {
 679         cdev_t dev = ap->a_head.a_dev;
 680         struct knote *kn = ap->a_kn;
 681         struct uhid_softc *sc;
 682         struct klist *klist;
 683
 684         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 685
 686         if (sc->sc_dying) {
 687                 ap->a_result = 1;
 688                 return (0);
 689         }
 690
 691         ap->a_result = 0;
 692
 693         switch (kn->kn_filter) {
 694         case EVFILT_READ:
 695                 kn->kn_fop = &uhidfiltops_read;
 696                 kn->kn_hook = (caddr_t)sc;
 697                 break;
 698         case EVFILT_WRITE:
 699                 kn->kn_fop = &uhidfiltops_write;
 700                 kn->kn_hook = (caddr_t)sc;
 701                 break;
 702         default:
 703                 ap->a_result = EOPNOTSUPP;
 704                 return (0);
 705         }
 706
 707         klist = &sc->sc_rkq.ki_note;
 708         knote_insert(klist, kn);
 709
 710         return (0);
 711 }
 712
 713 static void
 714 uhidfilt_detach(struct knote *kn)
 715 {
 716         cdev_t dev = (cdev_t)kn->kn_hook;
 717         struct uhid_softc *sc;
 718         struct klist *klist;
 719
 720         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 721
 722         klist = &sc->sc_rkq.ki_note;
 723         knote_remove(klist, kn);
 724 }
 725
 726 static int
 727 uhidfilt_read(struct knote *kn, long hint)
 728 {
 729         cdev_t dev = (cdev_t)kn->kn_hook;
 730         struct uhid_softc *sc;
 731         int ready = 0;
 732
 733         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 734
 735         crit_enter();
 736         if (sc->sc_q.c_cc > 0)
 737                 ready = 1;
 738         crit_exit();
 739
 740         return (ready);
 741 }
 742
 743 static int
 744 uhidfilt_write(struct knote *kn, long hint)
 745 {
 746         return (1);
 747 }
 748
 749 DRIVER_MODULE(uhid, uhub, uhid_driver, uhid_devclass, usbd_driver_load, 0);
 750