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  */
   5
   6 /* Also already merged from NetBSD:
   7  *      $NetBSD: uhid.c,v 1.54 2002/09/23 05:51:21 simonb Exp $
   8  */
   9
  10 /*
  11  * Copyright (c) 1998 The NetBSD Foundation, Inc.
  12  * All rights reserved.
  13  *
  14  * This code is derived from software contributed to The NetBSD Foundation
  15  * by Lennart Augustsson (lennart@augustsson.net) at
  16  * Carlstedt Research & Technology.
  17  *
  18  * Redistribution and use in source and binary forms, with or without
  19  * modification, are permitted provided that the following conditions
  20  * are met:
  21  * 1. Redistributions of source code must retain the above copyright
  22  *    notice, this list of conditions and the following disclaimer.
  23  * 2. Redistributions in binary form must reproduce the above copyright
  24  *    notice, this list of conditions and the following disclaimer in the
  25  *    documentation and/or other materials provided with the distribution.
  26  * 3. All advertising materials mentioning features or use of this software
  27  *    must display the following acknowledgement:
  28  *        This product includes software developed by the NetBSD
  29  *        Foundation, Inc. and its contributors.
  30  * 4. Neither the name of The NetBSD Foundation nor the names of its
  31  *    contributors may be used to endorse or promote products derived
  32  *    from this software without specific prior written permission.
  33  *
  34  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  35  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  36  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  37  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  38  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  39  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  40  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  41  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  42  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  43  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  44  * POSSIBILITY OF SUCH DAMAGE.
  45  */
  46
  47 /*
  48  * HID spec: http://www.usb.org/developers/data/usbhid10.pdf
  49  */
  50
  51 #include <sys/param.h>
  52 #include <sys/systm.h>
  53 #include <sys/kernel.h>
  54 #include <sys/lock.h>
  55 #include <sys/malloc.h>
  56 #include <sys/signalvar.h>
  57 #include <sys/filio.h>
  58 #include <sys/module.h>
  59 #include <sys/bus.h>
  60 #include <sys/conf.h>
  61 #include <sys/tty.h>
  62 #include <sys/proc.h>
  63 #include <sys/vnode.h>
  64 #include <sys/event.h>
  65 #include <sys/sysctl.h>
  66 #include <sys/thread2.h>
  67
  68 #include <bus/usb/usb.h>
  69 #include <bus/usb/usbhid.h>
  70
  71 #include <bus/usb/usbdi.h>
  72 #include <bus/usb/usbdi_util.h>
  73 #include <bus/usb/hid.h>
  74
  75 /* Report descriptor for broken Wacom Graphire */
  76 #include <bus/usb/ugraphire_rdesc.h>
  77
  78 #ifdef USB_DEBUG
  79 #define DPRINTF(x)      if (uhiddebug) kprintf x
  80 #define DPRINTFN(n,x)   if (uhiddebug>(n)) kprintf x
  81 int     uhiddebug = 0;
  82 SYSCTL_NODE(_hw_usb, OID_AUTO, uhid, CTLFLAG_RW, 0, "USB uhid");
  83 SYSCTL_INT(_hw_usb_uhid, OID_AUTO, debug, CTLFLAG_RW,
  84            &uhiddebug, 0, "uhid debug level");
  85 #else
  86 #define DPRINTF(x)
  87 #define DPRINTFN(n,x)
  88 #endif
  89
  90 struct uhid_softc {
  91         device_t sc_dev;                        /* base device */
  92         usbd_device_handle sc_udev;
  93         usbd_interface_handle sc_iface; /* interface */
  94         usbd_pipe_handle sc_intrpipe;   /* interrupt pipe */
  95         int sc_ep_addr;
  96
  97         int sc_isize;
  98         int sc_osize;
  99         int sc_fsize;
 100         u_int8_t sc_iid;
 101         u_int8_t sc_oid;
 102         u_int8_t sc_fid;
 103
 104         u_char *sc_ibuf;
 105         u_char *sc_obuf;
 106
 107         void *sc_repdesc;
 108         int sc_repdesc_size;
 109
 110         struct clist sc_q;
 111         struct kqinfo sc_rkq;
 112         struct proc *sc_async;  /* process that wants SIGIO */
 113         u_char sc_state;        /* driver state */
 114 #define UHID_OPEN       0x01    /* device is open */
 115 #define UHID_ASLP       0x02    /* waiting for device data */
 116 #define UHID_NEEDCLEAR  0x04    /* needs clearing endpoint stall */
 117 #define UHID_IMMED      0x08    /* return read data immediately */
 118
 119         int sc_refcnt;
 120         u_char sc_dying;
 121 };
 122
 123 #define UHIDUNIT(dev)   (minor(dev))
 124 #define UHID_CHUNK      128     /* chunk size for read */
 125 #define UHID_BSIZE      1020    /* buffer size */
 126
 127 d_open_t        uhidopen;
 128 d_close_t       uhidclose;
 129 d_read_t        uhidread;
 130 d_write_t       uhidwrite;
 131 d_ioctl_t       uhidioctl;
 132 d_kqfilter_t    uhidkqfilter;
 133
 134 static void uhidfilt_detach(struct knote *);
 135 static int uhidfilt_read(struct knote *, long);
 136 static int uhidfilt_write(struct knote *, long);
 137
 138 static struct dev_ops uhid_ops = {
 139         { "uhid", 0, 0 },
 140         .d_open =       uhidopen,
 141         .d_close =      uhidclose,
 142         .d_read =       uhidread,
 143         .d_write =      uhidwrite,
 144         .d_ioctl =      uhidioctl,
 145         .d_kqfilter =   uhidkqfilter
 146 };
 147
 148 static void uhid_intr(usbd_xfer_handle, usbd_private_handle,
 149                            usbd_status);
 150
 151 static int uhid_do_read(struct uhid_softc *, struct uio *uio, int);
 152 static int uhid_do_write(struct uhid_softc *, struct uio *uio, int);
 153 static int uhid_do_ioctl(struct uhid_softc *, u_long, caddr_t, int);
 154
 155 static device_probe_t uhid_match;
 156 static device_attach_t uhid_attach;
 157 static device_detach_t uhid_detach;
 158
 159 static devclass_t uhid_devclass;
 160
 161 static kobj_method_t uhid_methods[] = {
 162         DEVMETHOD(device_probe, uhid_match),
 163         DEVMETHOD(device_attach, uhid_attach),
 164         DEVMETHOD(device_detach, uhid_detach),
 165         DEVMETHOD_END
 166 };
 167
 168 static driver_t uhid_driver = {
 169         "uhid",
 170         uhid_methods,
 171         sizeof(struct uhid_softc)
 172 };
 173
 174 MODULE_DEPEND(uhid, usb, 1, 1, 1);
 175
 176 static int
 177 uhid_match(device_t self)
 178 {
 179         struct usb_attach_arg *uaa = device_get_ivars(self);
 180         usb_interface_descriptor_t *id;
 181
 182         if (uaa->iface == NULL)
 183                 return (UMATCH_NONE);
 184         id = usbd_get_interface_descriptor(uaa->iface);
 185         if (id == NULL || id->bInterfaceClass != UICLASS_HID)
 186                 return (UMATCH_NONE);
 187         if (uaa->matchlvl)
 188                 return (uaa->matchlvl);
 189         return (UMATCH_IFACECLASS_GENERIC);
 190 }
 191
 192 static int
 193 uhid_attach(device_t self)
 194 {
 195         struct uhid_softc *sc = device_get_softc(self);
 196         struct usb_attach_arg *uaa = device_get_ivars(self);
 197         usbd_interface_handle iface = uaa->iface;
 198         usb_endpoint_descriptor_t *ed;
 199         int size;
 200         void *desc;
 201         usbd_status err;
 202
 203         sc->sc_udev = uaa->device;
 204         sc->sc_iface = iface;
 205         sc->sc_dev = self;
 206
 207         ed = usbd_interface2endpoint_descriptor(iface, 0);
 208         if (ed == NULL) {
 209                 kprintf("%s: could not read endpoint descriptor\n",
 210                        device_get_nameunit(sc->sc_dev));
 211                 sc->sc_dying = 1;
 212                 return ENXIO;
 213         }
 214
 215         DPRINTFN(10,("uhid_attach: bLength=%d bDescriptorType=%d "
 216                      "bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d"
 217                      " bInterval=%d\n",
 218                      ed->bLength, ed->bDescriptorType,
 219                      ed->bEndpointAddress & UE_ADDR,
 220                      UE_GET_DIR(ed->bEndpointAddress)==UE_DIR_IN? "in" : "out",
 221                      ed->bmAttributes & UE_XFERTYPE,
 222                      UGETW(ed->wMaxPacketSize), ed->bInterval));
 223
 224         if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN ||
 225             (ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
 226                 kprintf("%s: unexpected endpoint\n", device_get_nameunit(sc->sc_dev));
 227                 sc->sc_dying = 1;
 228                 return ENXIO;
 229         }
 230
 231         sc->sc_ep_addr = ed->bEndpointAddress;
 232
 233         /* The report descriptor for the Wacom Graphire is broken. */
 234         if (uaa->vendor == 0x056a && uaa->product == 0x0010 /* &&
 235             uaa->revision == 0x???? */) { /* XXX should use revision */
 236                 size = sizeof uhid_graphire_report_descr;
 237                 desc = kmalloc(size, M_USBDEV, M_INTWAIT);
 238                 err = USBD_NORMAL_COMPLETION;
 239                 memcpy(desc, uhid_graphire_report_descr, size);
 240         } else {
 241                 desc = NULL;
 242                 err = usbd_read_report_desc(uaa->iface, &desc, &size,M_USBDEV);
 243         }
 244
 245         if (err) {
 246                 kprintf("%s: no report descriptor\n", device_get_nameunit(sc->sc_dev));
 247                 sc->sc_dying = 1;
 248                 return ENXIO;
 249         }
 250
 251         (void)usbd_set_idle(iface, 0, 0);
 252
 253         sc->sc_isize = hid_report_size(desc, size, hid_input,   &sc->sc_iid);
 254         sc->sc_osize = hid_report_size(desc, size, hid_output,  &sc->sc_oid);
 255         sc->sc_fsize = hid_report_size(desc, size, hid_feature, &sc->sc_fid);
 256
 257         sc->sc_repdesc = desc;
 258         sc->sc_repdesc_size = size;
 259
 260         make_dev(&uhid_ops, device_get_unit(self),
 261                  UID_ROOT, GID_OPERATOR,
 262                  0644, "uhid%d", device_get_unit(self));
 263
 264         return 0;
 265 }
 266
 267 static int
 268 uhid_detach(device_t self)
 269 {
 270         struct uhid_softc *sc = device_get_softc(self);
 271
 272         DPRINTF(("uhid_detach: sc=%p\n", sc));
 273
 274         sc->sc_dying = 1;
 275         if (sc->sc_intrpipe != NULL)
 276                 usbd_abort_pipe(sc->sc_intrpipe);
 277
 278         if (sc->sc_state & UHID_OPEN) {
 279                 crit_enter();
 280                 if (--sc->sc_refcnt >= 0) {
 281                         /* Wake everyone */
 282                         wakeup(&sc->sc_q);
 283                         /* Wait for processes to go away. */
 284                         usb_detach_wait(sc->sc_dev);
 285                 }
 286                 crit_exit();
 287         }
 288
 289         dev_ops_remove_minor(&uhid_ops, device_get_unit(self));
 290
 291         if (sc->sc_repdesc)
 292                 kfree(sc->sc_repdesc, M_USBDEV);
 293
 294         return (0);
 295 }
 296
 297 void
 298 uhid_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
 299 {
 300         struct uhid_softc *sc = addr;
 301
 302 #ifdef USB_DEBUG
 303         if (uhiddebug > 5) {
 304                 u_int32_t cc, i;
 305
 306                 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
 307                 DPRINTF(("uhid_intr: status=%d cc=%d\n", status, cc));
 308                 DPRINTF(("uhid_intr: data ="));
 309                 for (i = 0; i < cc; i++)
 310                         DPRINTF((" %02x", sc->sc_ibuf[i]));
 311                 DPRINTF(("\n"));
 312         }
 313 #endif
 314
 315         if (status == USBD_CANCELLED)
 316                 return;
 317
 318         if (status != USBD_NORMAL_COMPLETION) {
 319                 DPRINTF(("uhid_intr: status=%d\n", status));
 320                 if (status == USBD_STALLED)
 321                     sc->sc_state |= UHID_NEEDCLEAR;
 322                 return;
 323         }
 324
 325         (void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q);
 326
 327         if (sc->sc_state & UHID_ASLP) {
 328                 sc->sc_state &= ~UHID_ASLP;
 329                 DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q));
 330                 wakeup(&sc->sc_q);
 331         }
 332         KNOTE(&sc->sc_rkq.ki_note, 0);
 333         if (sc->sc_async != NULL) {
 334                 DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n", sc->sc_async));
 335                 ksignal(sc->sc_async, SIGIO);
 336         }
 337 }
 338
 339 int
 340 uhidopen(struct dev_open_args *ap)
 341 {
 342         cdev_t dev = ap->a_head.a_dev;
 343         struct uhid_softc *sc;
 344         usbd_status err;
 345
 346         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 347         if (sc == NULL)
 348                 return (ENXIO);
 349
 350         DPRINTF(("uhidopen: sc=%p\n", sc));
 351
 352         if (sc->sc_dying)
 353                 return (ENXIO);
 354
 355         if (sc->sc_state & UHID_OPEN)
 356                 return (EBUSY);
 357         sc->sc_state |= UHID_OPEN;
 358
 359         if ((clist_alloc_cblocks(&sc->sc_q, UHID_BSIZE,
 360                                  UHID_BSIZE), 0) == -1) {
 361                 sc->sc_state &= ~UHID_OPEN;
 362                 return (ENOMEM);
 363         }
 364
 365         sc->sc_ibuf = kmalloc(sc->sc_isize, M_USBDEV, M_WAITOK);
 366         sc->sc_obuf = kmalloc(sc->sc_osize, M_USBDEV, M_WAITOK);
 367
 368         /* Set up interrupt pipe. */
 369         err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr,
 370                   USBD_SHORT_XFER_OK, &sc->sc_intrpipe, sc, sc->sc_ibuf,
 371                   sc->sc_isize, uhid_intr, USBD_DEFAULT_INTERVAL);
 372         if (err) {
 373                 DPRINTF(("uhidopen: usbd_open_pipe_intr failed, "
 374                          "error=%d\n",err));
 375                 kfree(sc->sc_ibuf, M_USBDEV);
 376                 kfree(sc->sc_obuf, M_USBDEV);
 377                 sc->sc_ibuf = sc->sc_obuf = NULL;
 378
 379                 sc->sc_state &= ~UHID_OPEN;
 380                 return (EIO);
 381         }
 382
 383         sc->sc_state &= ~UHID_IMMED;
 384
 385         sc->sc_async = NULL;
 386
 387         return (0);
 388 }
 389
 390 int
 391 uhidclose(struct dev_close_args *ap)
 392 {
 393         cdev_t dev = ap->a_head.a_dev;
 394         struct uhid_softc *sc;
 395
 396         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 397
 398         DPRINTF(("uhidclose: sc=%p\n", sc));
 399
 400         /* Disable interrupts. */
 401         usbd_abort_pipe(sc->sc_intrpipe);
 402         usbd_close_pipe(sc->sc_intrpipe);
 403         sc->sc_intrpipe = 0;
 404
 405         ndflush(&sc->sc_q, sc->sc_q.c_cc);
 406         clist_free_cblocks(&sc->sc_q);
 407
 408         kfree(sc->sc_ibuf, M_USBDEV);
 409         kfree(sc->sc_obuf, M_USBDEV);
 410         sc->sc_ibuf = sc->sc_obuf = NULL;
 411
 412         sc->sc_state &= ~UHID_OPEN;
 413
 414         sc->sc_async = NULL;
 415
 416         return (0);
 417 }
 418
 419 int
 420 uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag)
 421 {
 422         int error = 0;
 423         size_t length;
 424         u_char buffer[UHID_CHUNK];
 425         usbd_status err;
 426
 427         DPRINTFN(1, ("uhidread\n"));
 428         if (sc->sc_state & UHID_IMMED) {
 429                 DPRINTFN(1, ("uhidread immed\n"));
 430
 431                 err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 432                           sc->sc_iid, buffer, sc->sc_isize);
 433                 if (err)
 434                         return (EIO);
 435                 return (uiomove(buffer, sc->sc_isize, uio));
 436         }
 437
 438         crit_enter();
 439         while (sc->sc_q.c_cc == 0) {
 440                 if (flag & IO_NDELAY) {
 441                         crit_exit();
 442                         return (EWOULDBLOCK);
 443                 }
 444                 sc->sc_state |= UHID_ASLP;
 445                 DPRINTFN(5, ("uhidread: sleep on %p\n", &sc->sc_q));
 446                 error = tsleep(&sc->sc_q, PCATCH, "uhidrea", 0);
 447                 DPRINTFN(5, ("uhidread: woke, error=%d\n", error));
 448                 if (sc->sc_dying)
 449                         error = EIO;
 450                 if (error) {
 451                         sc->sc_state &= ~UHID_ASLP;
 452                         break;
 453                 }
 454                 if (sc->sc_state & UHID_NEEDCLEAR) {
 455                         DPRINTFN(-1,("uhidread: clearing stall\n"));
 456                         sc->sc_state &= ~UHID_NEEDCLEAR;
 457                         usbd_clear_endpoint_stall(sc->sc_intrpipe);
 458                 }
 459         }
 460         crit_exit();
 461
 462         /* Transfer as many chunks as possible. */
 463         while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) {
 464                 length = szmin(sc->sc_q.c_cc, uio->uio_resid);
 465                 if (length > sizeof(buffer))
 466                         length = sizeof(buffer);
 467
 468                 /* Remove a small chunk from the input queue. */
 469                 (void) q_to_b(&sc->sc_q, buffer, length);
 470                 DPRINTFN(5, ("uhidread: got %lu chars\n", (u_long)length));
 471
 472                 /* Copy the data to the user process. */
 473                 if ((error = uiomove(buffer, length, uio)) != 0)
 474                         break;
 475         }
 476
 477         return (error);
 478 }
 479
 480 int
 481 uhidread(struct dev_read_args *ap)
 482 {
 483         cdev_t dev = ap->a_head.a_dev;
 484         struct uhid_softc *sc;
 485         int error;
 486
 487         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 488
 489         sc->sc_refcnt++;
 490         error = uhid_do_read(sc, ap->a_uio, ap->a_ioflag);
 491         if (--sc->sc_refcnt < 0)
 492                 usb_detach_wakeup(sc->sc_dev);
 493         return (error);
 494 }
 495
 496 int
 497 uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag)
 498 {
 499         int error;
 500         int size;
 501         usbd_status err;
 502
 503         DPRINTFN(1, ("uhidwrite\n"));
 504
 505         if (sc->sc_dying)
 506                 return (EIO);
 507
 508         size = sc->sc_osize;
 509         if (uio->uio_resid != size)
 510                 return (EINVAL);
 511         error = uiomove(sc->sc_obuf, size, uio);
 512         if (!error) {
 513                 if (sc->sc_oid)
 514                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 515                                   sc->sc_obuf[0], sc->sc_obuf+1, size-1);
 516                 else
 517                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 518                                   0, sc->sc_obuf, size);
 519                 if (err)
 520                         error = EIO;
 521         }
 522
 523         return (error);
 524 }
 525
 526 int
 527 uhidwrite(struct dev_write_args *ap)
 528 {
 529         cdev_t dev = ap->a_head.a_dev;
 530         struct uhid_softc *sc;
 531         int error;
 532
 533         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 534
 535         sc->sc_refcnt++;
 536         error = uhid_do_write(sc, ap->a_uio, ap->a_ioflag);
 537         if (--sc->sc_refcnt < 0)
 538                 usb_detach_wakeup(sc->sc_dev);
 539         return (error);
 540 }
 541
 542 int
 543 uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, caddr_t addr, int flag)
 544 {
 545         struct usb_ctl_report_desc *rd;
 546         struct usb_ctl_report *re;
 547         int size, id;
 548         usbd_status err;
 549
 550         DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd));
 551
 552         if (sc->sc_dying)
 553                 return (EIO);
 554
 555         switch (cmd) {
 556         case FIOASYNC:
 557                 if (*(int *)addr) {
 558                         if (sc->sc_async != NULL)
 559                                 return (EBUSY);
 560                         sc->sc_async = curproc;
 561                         DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n", sc->sc_async));
 562                 } else
 563                         sc->sc_async = NULL;
 564                 break;
 565
 566         /* XXX this is not the most general solution. */
 567         case TIOCSPGRP:
 568                 if (sc->sc_async == NULL)
 569                         return (EINVAL);
 570                 if (*(int *)addr != sc->sc_async->p_pgid)
 571                         return (EPERM);
 572                 break;
 573
 574         case USB_GET_REPORT_DESC:
 575                 rd = (struct usb_ctl_report_desc *)addr;
 576                 size = min(sc->sc_repdesc_size, sizeof rd->ucrd_data);
 577                 rd->ucrd_size = size;
 578                 memcpy(rd->ucrd_data, sc->sc_repdesc, size);
 579                 break;
 580
 581         case USB_SET_IMMED:
 582                 if (*(int *)addr) {
 583                         /* XXX should read into ibuf, but does it matter? */
 584                         err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 585                                   sc->sc_iid, sc->sc_ibuf, sc->sc_isize);
 586                         if (err)
 587                                 return (EOPNOTSUPP);
 588
 589                         sc->sc_state |=  UHID_IMMED;
 590                 } else
 591                         sc->sc_state &= ~UHID_IMMED;
 592                 break;
 593
 594         case USB_GET_REPORT:
 595                 re = (struct usb_ctl_report *)addr;
 596                 switch (re->ucr_report) {
 597                 case UHID_INPUT_REPORT:
 598                         size = sc->sc_isize;
 599                         id = sc->sc_iid;
 600                         break;
 601                 case UHID_OUTPUT_REPORT:
 602                         size = sc->sc_osize;
 603                         id = sc->sc_oid;
 604                         break;
 605                 case UHID_FEATURE_REPORT:
 606                         size = sc->sc_fsize;
 607                         id = sc->sc_fid;
 608                         break;
 609                 default:
 610                         return (EINVAL);
 611                 }
 612                 err = usbd_get_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 613                           size);
 614                 if (err)
 615                         return (EIO);
 616                 break;
 617
 618         case USB_SET_REPORT:
 619                 re = (struct usb_ctl_report *)addr;
 620                 switch (re->ucr_report) {
 621                 case UHID_INPUT_REPORT:
 622                         size = sc->sc_isize;
 623                         id = sc->sc_iid;
 624                         break;
 625                 case UHID_OUTPUT_REPORT:
 626                         size = sc->sc_osize;
 627                         id = sc->sc_oid;
 628                         break;
 629                 case UHID_FEATURE_REPORT:
 630                         size = sc->sc_fsize;
 631                         id = sc->sc_fid;
 632                         break;
 633                 default:
 634                         return (EINVAL);
 635                 }
 636                 err = usbd_set_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 637                           size);
 638                 if (err)
 639                         return (EIO);
 640                 break;
 641
 642         case USB_GET_REPORT_ID:
 643                 *(int *)addr = 0;       /* XXX: we only support reportid 0? */
 644                 break;
 645
 646         default:
 647                 return (EINVAL);
 648         }
 649         return (0);
 650 }
 651
 652 int
 653 uhidioctl(struct dev_ioctl_args *ap)
 654 {
 655         cdev_t dev = ap->a_head.a_dev;
 656         struct uhid_softc *sc;
 657         int error;
 658
 659         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 660
 661         sc->sc_refcnt++;
 662         error = uhid_do_ioctl(sc, ap->a_cmd, ap->a_data, ap->a_fflag);
 663         if (--sc->sc_refcnt < 0)
 664                 usb_detach_wakeup(sc->sc_dev);
 665         return (error);
 666 }
 667
 668 static struct filterops uhidfiltops_read =
 669         { FILTEROP_ISFD, NULL, uhidfilt_detach, uhidfilt_read };
 670 static struct filterops uhidfiltops_write =
 671         { FILTEROP_ISFD, NULL, uhidfilt_detach, uhidfilt_write };
 672
 673 int
 674 uhidkqfilter(struct dev_kqfilter_args *ap)
 675 {
 676         cdev_t dev = ap->a_head.a_dev;
 677         struct knote *kn = ap->a_kn;
 678         struct uhid_softc *sc;
 679         struct klist *klist;
 680
 681         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 682
 683         if (sc->sc_dying) {
 684                 ap->a_result = 1;
 685                 return (0);
 686         }
 687
 688         ap->a_result = 0;
 689
 690         switch (kn->kn_filter) {
 691         case EVFILT_READ:
 692                 kn->kn_fop = &uhidfiltops_read;
 693                 kn->kn_hook = (caddr_t)sc;
 694                 break;
 695         case EVFILT_WRITE:
 696                 kn->kn_fop = &uhidfiltops_write;
 697                 kn->kn_hook = (caddr_t)sc;
 698                 break;
 699         default:
 700                 ap->a_result = EOPNOTSUPP;
 701                 return (0);
 702         }
 703
 704         klist = &sc->sc_rkq.ki_note;
 705         knote_insert(klist, kn);
 706
 707         return (0);
 708 }
 709
 710 static void
 711 uhidfilt_detach(struct knote *kn)
 712 {
 713         cdev_t dev = (cdev_t)kn->kn_hook;
 714         struct uhid_softc *sc;
 715         struct klist *klist;
 716
 717         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 718
 719         klist = &sc->sc_rkq.ki_note;
 720         knote_remove(klist, kn);
 721 }
 722
 723 static int
 724 uhidfilt_read(struct knote *kn, long hint)
 725 {
 726         cdev_t dev = (cdev_t)kn->kn_hook;
 727         struct uhid_softc *sc;
 728         int ready = 0;
 729
 730         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 731
 732         crit_enter();
 733         if (sc->sc_q.c_cc > 0)
 734                 ready = 1;
 735         crit_exit();
 736
 737         return (ready);
 738 }
 739
 740 static int
 741 uhidfilt_write(struct knote *kn, long hint)
 742 {
 743         return (1);
 744 }
 745
 746 DRIVER_MODULE(uhid, uhub, uhid_driver, uhid_devclass, usbd_driver_load, NULL);
 747