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/select.h>
  64 #include <sys/proc.h>
  65 #include <sys/vnode.h>
  66 #include <sys/event.h>
  67 #include <sys/sysctl.h>
  68 #include <sys/thread2.h>
  69
  70 #include <bus/usb/usb.h>
  71 #include <bus/usb/usbhid.h>
  72
  73 #include <bus/usb/usbdi.h>
  74 #include <bus/usb/usbdi_util.h>
  75 #include <bus/usb/hid.h>
  76
  77 /* Report descriptor for broken Wacom Graphire */
  78 #include <bus/usb/ugraphire_rdesc.h>
  79
  80 #ifdef USB_DEBUG
  81 #define DPRINTF(x)      if (uhiddebug) kprintf x
  82 #define DPRINTFN(n,x)   if (uhiddebug>(n)) kprintf x
  83 int     uhiddebug = 0;
  84 SYSCTL_NODE(_hw_usb, OID_AUTO, uhid, CTLFLAG_RW, 0, "USB uhid");
  85 SYSCTL_INT(_hw_usb_uhid, OID_AUTO, debug, CTLFLAG_RW,
  86            &uhiddebug, 0, "uhid debug level");
  87 #else
  88 #define DPRINTF(x)
  89 #define DPRINTFN(n,x)
  90 #endif
  91
  92 struct uhid_softc {
  93         device_t sc_dev;                        /* base device */
  94         usbd_device_handle sc_udev;
  95         usbd_interface_handle sc_iface; /* interface */
  96         usbd_pipe_handle sc_intrpipe;   /* interrupt pipe */
  97         int sc_ep_addr;
  98
  99         int sc_isize;
 100         int sc_osize;
 101         int sc_fsize;
 102         u_int8_t sc_iid;
 103         u_int8_t sc_oid;
 104         u_int8_t sc_fid;
 105
 106         u_char *sc_ibuf;
 107         u_char *sc_obuf;
 108
 109         void *sc_repdesc;
 110         int sc_repdesc_size;
 111
 112         struct clist sc_q;
 113         struct selinfo sc_rsel;
 114         struct proc *sc_async;  /* process that wants SIGIO */
 115         u_char sc_state;        /* driver state */
 116 #define UHID_OPEN       0x01    /* device is open */
 117 #define UHID_ASLP       0x02    /* waiting for device data */
 118 #define UHID_NEEDCLEAR  0x04    /* needs clearing endpoint stall */
 119 #define UHID_IMMED      0x08    /* return read data immediately */
 120
 121         int sc_refcnt;
 122         u_char sc_dying;
 123 };
 124
 125 #define UHIDUNIT(dev)   (minor(dev))
 126 #define UHID_CHUNK      128     /* chunk size for read */
 127 #define UHID_BSIZE      1020    /* buffer size */
 128
 129 d_open_t        uhidopen;
 130 d_close_t       uhidclose;
 131 d_read_t        uhidread;
 132 d_write_t       uhidwrite;
 133 d_ioctl_t       uhidioctl;
 134 d_kqfilter_t    uhidkqfilter;
 135
 136 static void uhidfilt_detach(struct knote *);
 137 static int uhidfilt_read(struct knote *, long);
 138 static int uhidfilt_write(struct knote *, long);
 139
 140 #define         UHID_CDEV_MAJOR 122
 141
 142 static struct dev_ops uhid_ops = {
 143         { "uhid", UHID_CDEV_MAJOR, D_KQFILTER },
 144         .d_open =       uhidopen,
 145         .d_close =      uhidclose,
 146         .d_read =       uhidread,
 147         .d_write =      uhidwrite,
 148         .d_ioctl =      uhidioctl,
 149         .d_kqfilter =   uhidkqfilter
 150 };
 151
 152 static void uhid_intr(usbd_xfer_handle, usbd_private_handle,
 153                            usbd_status);
 154
 155 static int uhid_do_read(struct uhid_softc *, struct uio *uio, int);
 156 static int uhid_do_write(struct uhid_softc *, struct uio *uio, int);
 157 static int uhid_do_ioctl(struct uhid_softc *, u_long, caddr_t, int);
 158
 159 static device_probe_t uhid_match;
 160 static device_attach_t uhid_attach;
 161 static device_detach_t uhid_detach;
 162
 163 static devclass_t uhid_devclass;
 164
 165 static kobj_method_t uhid_methods[] = {
 166         DEVMETHOD(device_probe, uhid_match),
 167         DEVMETHOD(device_attach, uhid_attach),
 168         DEVMETHOD(device_detach, uhid_detach),
 169         {0,0}
 170 };
 171
 172 static driver_t uhid_driver = {
 173         "uhid",
 174         uhid_methods,
 175         sizeof(struct uhid_softc)
 176 };
 177
 178 MODULE_DEPEND(uhid, usb, 1, 1, 1);
 179
 180 static int
 181 uhid_match(device_t self)
 182 {
 183         struct usb_attach_arg *uaa = device_get_ivars(self);
 184         usb_interface_descriptor_t *id;
 185
 186         if (uaa->iface == NULL)
 187                 return (UMATCH_NONE);
 188         id = usbd_get_interface_descriptor(uaa->iface);
 189         if (id == NULL || id->bInterfaceClass != UICLASS_HID)
 190                 return (UMATCH_NONE);
 191         if (uaa->matchlvl)
 192                 return (uaa->matchlvl);
 193         return (UMATCH_IFACECLASS_GENERIC);
 194 }
 195
 196 static int
 197 uhid_attach(device_t self)
 198 {
 199         struct uhid_softc *sc = device_get_softc(self);
 200         struct usb_attach_arg *uaa = device_get_ivars(self);
 201         usbd_interface_handle iface = uaa->iface;
 202         usb_endpoint_descriptor_t *ed;
 203         int size;
 204         void *desc;
 205         usbd_status err;
 206
 207         sc->sc_udev = uaa->device;
 208         sc->sc_iface = iface;
 209         sc->sc_dev = self;
 210
 211         ed = usbd_interface2endpoint_descriptor(iface, 0);
 212         if (ed == NULL) {
 213                 kprintf("%s: could not read endpoint descriptor\n",
 214                        device_get_nameunit(sc->sc_dev));
 215                 sc->sc_dying = 1;
 216                 return ENXIO;
 217         }
 218
 219         DPRINTFN(10,("uhid_attach: bLength=%d bDescriptorType=%d "
 220                      "bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d"
 221                      " bInterval=%d\n",
 222                      ed->bLength, ed->bDescriptorType,
 223                      ed->bEndpointAddress & UE_ADDR,
 224                      UE_GET_DIR(ed->bEndpointAddress)==UE_DIR_IN? "in" : "out",
 225                      ed->bmAttributes & UE_XFERTYPE,
 226                      UGETW(ed->wMaxPacketSize), ed->bInterval));
 227
 228         if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN ||
 229             (ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
 230                 kprintf("%s: unexpected endpoint\n", device_get_nameunit(sc->sc_dev));
 231                 sc->sc_dying = 1;
 232                 return ENXIO;
 233         }
 234
 235         sc->sc_ep_addr = ed->bEndpointAddress;
 236
 237         /* The report descriptor for the Wacom Graphire is broken. */
 238         if (uaa->vendor == 0x056a && uaa->product == 0x0010 /* &&
 239             uaa->revision == 0x???? */) { /* XXX should use revision */
 240                 size = sizeof uhid_graphire_report_descr;
 241                 desc = kmalloc(size, M_USBDEV, M_INTWAIT);
 242                 err = USBD_NORMAL_COMPLETION;
 243                 memcpy(desc, uhid_graphire_report_descr, size);
 244         } else {
 245                 desc = NULL;
 246                 err = usbd_read_report_desc(uaa->iface, &desc, &size,M_USBDEV);
 247         }
 248
 249         if (err) {
 250                 kprintf("%s: no report descriptor\n", device_get_nameunit(sc->sc_dev));
 251                 sc->sc_dying = 1;
 252                 return ENXIO;
 253         }
 254
 255         (void)usbd_set_idle(iface, 0, 0);
 256
 257         sc->sc_isize = hid_report_size(desc, size, hid_input,   &sc->sc_iid);
 258         sc->sc_osize = hid_report_size(desc, size, hid_output,  &sc->sc_oid);
 259         sc->sc_fsize = hid_report_size(desc, size, hid_feature, &sc->sc_fid);
 260
 261         sc->sc_repdesc = desc;
 262         sc->sc_repdesc_size = size;
 263
 264         make_dev(&uhid_ops, device_get_unit(self),
 265                  UID_ROOT, GID_OPERATOR,
 266                  0644, "uhid%d", device_get_unit(self));
 267
 268         return 0;
 269 }
 270
 271 static int
 272 uhid_detach(device_t self)
 273 {
 274         struct uhid_softc *sc = device_get_softc(self);
 275
 276         DPRINTF(("uhid_detach: sc=%p\n", sc));
 277
 278         sc->sc_dying = 1;
 279         if (sc->sc_intrpipe != NULL)
 280                 usbd_abort_pipe(sc->sc_intrpipe);
 281
 282         if (sc->sc_state & UHID_OPEN) {
 283                 crit_enter();
 284                 if (--sc->sc_refcnt >= 0) {
 285                         /* Wake everyone */
 286                         wakeup(&sc->sc_q);
 287                         /* Wait for processes to go away. */
 288                         usb_detach_wait(sc->sc_dev);
 289                 }
 290                 crit_exit();
 291         }
 292
 293         dev_ops_remove_minor(&uhid_ops, device_get_unit(self));
 294
 295         if (sc->sc_repdesc)
 296                 kfree(sc->sc_repdesc, M_USBDEV);
 297
 298         return (0);
 299 }
 300
 301 void
 302 uhid_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
 303 {
 304         struct uhid_softc *sc = addr;
 305
 306 #ifdef USB_DEBUG
 307         if (uhiddebug > 5) {
 308                 u_int32_t cc, i;
 309
 310                 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
 311                 DPRINTF(("uhid_intr: status=%d cc=%d\n", status, cc));
 312                 DPRINTF(("uhid_intr: data ="));
 313                 for (i = 0; i < cc; i++)
 314                         DPRINTF((" %02x", sc->sc_ibuf[i]));
 315                 DPRINTF(("\n"));
 316         }
 317 #endif
 318
 319         if (status == USBD_CANCELLED)
 320                 return;
 321
 322         if (status != USBD_NORMAL_COMPLETION) {
 323                 DPRINTF(("uhid_intr: status=%d\n", status));
 324                 if (status == USBD_STALLED)
 325                     sc->sc_state |= UHID_NEEDCLEAR;
 326                 return;
 327         }
 328
 329         (void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q);
 330
 331         if (sc->sc_state & UHID_ASLP) {
 332                 sc->sc_state &= ~UHID_ASLP;
 333                 DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q));
 334                 wakeup(&sc->sc_q);
 335         }
 336         selwakeup(&sc->sc_rsel);
 337         if (sc->sc_async != NULL) {
 338                 DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n", sc->sc_async));
 339                 ksignal(sc->sc_async, SIGIO);
 340         }
 341 }
 342
 343 int
 344 uhidopen(struct dev_open_args *ap)
 345 {
 346         cdev_t dev = ap->a_head.a_dev;
 347         struct uhid_softc *sc;
 348         usbd_status err;
 349
 350         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 351         if (sc == NULL)
 352                 return (ENXIO);
 353
 354         DPRINTF(("uhidopen: sc=%p\n", sc));
 355
 356         if (sc->sc_dying)
 357                 return (ENXIO);
 358
 359         if (sc->sc_state & UHID_OPEN)
 360                 return (EBUSY);
 361         sc->sc_state |= UHID_OPEN;
 362
 363         if ((clist_alloc_cblocks(&sc->sc_q, UHID_BSIZE,
 364                                  UHID_BSIZE), 0) == -1) {
 365                 sc->sc_state &= ~UHID_OPEN;
 366                 return (ENOMEM);
 367         }
 368
 369         sc->sc_ibuf = kmalloc(sc->sc_isize, M_USBDEV, M_WAITOK);
 370         sc->sc_obuf = kmalloc(sc->sc_osize, M_USBDEV, M_WAITOK);
 371
 372         /* Set up interrupt pipe. */
 373         err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr,
 374                   USBD_SHORT_XFER_OK, &sc->sc_intrpipe, sc, sc->sc_ibuf,
 375                   sc->sc_isize, uhid_intr, USBD_DEFAULT_INTERVAL);
 376         if (err) {
 377                 DPRINTF(("uhidopen: usbd_open_pipe_intr failed, "
 378                          "error=%d\n",err));
 379                 kfree(sc->sc_ibuf, M_USBDEV);
 380                 kfree(sc->sc_obuf, M_USBDEV);
 381                 sc->sc_ibuf = sc->sc_obuf = NULL;
 382
 383                 sc->sc_state &= ~UHID_OPEN;
 384                 return (EIO);
 385         }
 386
 387         sc->sc_state &= ~UHID_IMMED;
 388
 389         sc->sc_async = 0;
 390
 391         return (0);
 392 }
 393
 394 int
 395 uhidclose(struct dev_close_args *ap)
 396 {
 397         cdev_t dev = ap->a_head.a_dev;
 398         struct uhid_softc *sc;
 399
 400         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 401
 402         DPRINTF(("uhidclose: sc=%p\n", sc));
 403
 404         /* Disable interrupts. */
 405         usbd_abort_pipe(sc->sc_intrpipe);
 406         usbd_close_pipe(sc->sc_intrpipe);
 407         sc->sc_intrpipe = 0;
 408
 409         ndflush(&sc->sc_q, sc->sc_q.c_cc);
 410         clist_free_cblocks(&sc->sc_q);
 411
 412         kfree(sc->sc_ibuf, M_USBDEV);
 413         kfree(sc->sc_obuf, M_USBDEV);
 414         sc->sc_ibuf = sc->sc_obuf = NULL;
 415
 416         sc->sc_state &= ~UHID_OPEN;
 417
 418         sc->sc_async = 0;
 419
 420         return (0);
 421 }
 422
 423 int
 424 uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag)
 425 {
 426         int error = 0;
 427         size_t length;
 428         u_char buffer[UHID_CHUNK];
 429         usbd_status err;
 430
 431         DPRINTFN(1, ("uhidread\n"));
 432         if (sc->sc_state & UHID_IMMED) {
 433                 DPRINTFN(1, ("uhidread immed\n"));
 434
 435                 err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 436                           sc->sc_iid, buffer, sc->sc_isize);
 437                 if (err)
 438                         return (EIO);
 439                 return (uiomove(buffer, sc->sc_isize, uio));
 440         }
 441
 442         crit_enter();
 443         while (sc->sc_q.c_cc == 0) {
 444                 if (flag & IO_NDELAY) {
 445                         crit_exit();
 446                         return (EWOULDBLOCK);
 447                 }
 448                 sc->sc_state |= UHID_ASLP;
 449                 DPRINTFN(5, ("uhidread: sleep on %p\n", &sc->sc_q));
 450                 error = tsleep(&sc->sc_q, PCATCH, "uhidrea", 0);
 451                 DPRINTFN(5, ("uhidread: woke, error=%d\n", error));
 452                 if (sc->sc_dying)
 453                         error = EIO;
 454                 if (error) {
 455                         sc->sc_state &= ~UHID_ASLP;
 456                         break;
 457                 }
 458                 if (sc->sc_state & UHID_NEEDCLEAR) {
 459                         DPRINTFN(-1,("uhidread: clearing stall\n"));
 460                         sc->sc_state &= ~UHID_NEEDCLEAR;
 461                         usbd_clear_endpoint_stall(sc->sc_intrpipe);
 462                 }
 463         }
 464         crit_exit();
 465
 466         /* Transfer as many chunks as possible. */
 467         while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) {
 468                 length = szmin(sc->sc_q.c_cc, uio->uio_resid);
 469                 if (length > sizeof(buffer))
 470                         length = sizeof(buffer);
 471
 472                 /* Remove a small chunk from the input queue. */
 473                 (void) q_to_b(&sc->sc_q, buffer, length);
 474                 DPRINTFN(5, ("uhidread: got %lu chars\n", (u_long)length));
 475
 476                 /* Copy the data to the user process. */
 477                 if ((error = uiomove(buffer, length, uio)) != 0)
 478                         break;
 479         }
 480
 481         return (error);
 482 }
 483
 484 int
 485 uhidread(struct dev_read_args *ap)
 486 {
 487         cdev_t dev = ap->a_head.a_dev;
 488         struct uhid_softc *sc;
 489         int error;
 490
 491         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 492
 493         sc->sc_refcnt++;
 494         error = uhid_do_read(sc, ap->a_uio, ap->a_ioflag);
 495         if (--sc->sc_refcnt < 0)
 496                 usb_detach_wakeup(sc->sc_dev);
 497         return (error);
 498 }
 499
 500 int
 501 uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag)
 502 {
 503         int error;
 504         int size;
 505         usbd_status err;
 506
 507         DPRINTFN(1, ("uhidwrite\n"));
 508
 509         if (sc->sc_dying)
 510                 return (EIO);
 511
 512         size = sc->sc_osize;
 513         if (uio->uio_resid != size)
 514                 return (EINVAL);
 515         error = uiomove(sc->sc_obuf, size, uio);
 516         if (!error) {
 517                 if (sc->sc_oid)
 518                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 519                                   sc->sc_obuf[0], sc->sc_obuf+1, size-1);
 520                 else
 521                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 522                                   0, sc->sc_obuf, size);
 523                 if (err)
 524                         error = EIO;
 525         }
 526
 527         return (error);
 528 }
 529
 530 int
 531 uhidwrite(struct dev_write_args *ap)
 532 {
 533         cdev_t dev = ap->a_head.a_dev;
 534         struct uhid_softc *sc;
 535         int error;
 536
 537         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 538
 539         sc->sc_refcnt++;
 540         error = uhid_do_write(sc, ap->a_uio, ap->a_ioflag);
 541         if (--sc->sc_refcnt < 0)
 542                 usb_detach_wakeup(sc->sc_dev);
 543         return (error);
 544 }
 545
 546 int
 547 uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, caddr_t addr, int flag)
 548 {
 549         struct usb_ctl_report_desc *rd;
 550         struct usb_ctl_report *re;
 551         int size, id;
 552         usbd_status err;
 553
 554         DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd));
 555
 556         if (sc->sc_dying)
 557                 return (EIO);
 558
 559         switch (cmd) {
 560         case FIOASYNC:
 561                 if (*(int *)addr) {
 562                         if (sc->sc_async != NULL)
 563                                 return (EBUSY);
 564                         sc->sc_async = curproc;
 565                         DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n", sc->sc_async));
 566                 } else
 567                         sc->sc_async = NULL;
 568                 break;
 569
 570         /* XXX this is not the most general solution. */
 571         case TIOCSPGRP:
 572                 if (sc->sc_async == NULL)
 573                         return (EINVAL);
 574                 if (*(int *)addr != sc->sc_async->p_pgid)
 575                         return (EPERM);
 576                 break;
 577
 578         case USB_GET_REPORT_DESC:
 579                 rd = (struct usb_ctl_report_desc *)addr;
 580                 size = min(sc->sc_repdesc_size, sizeof rd->ucrd_data);
 581                 rd->ucrd_size = size;
 582                 memcpy(rd->ucrd_data, sc->sc_repdesc, size);
 583                 break;
 584
 585         case USB_SET_IMMED:
 586                 if (*(int *)addr) {
 587                         /* XXX should read into ibuf, but does it matter? */
 588                         err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 589                                   sc->sc_iid, sc->sc_ibuf, sc->sc_isize);
 590                         if (err)
 591                                 return (EOPNOTSUPP);
 592
 593                         sc->sc_state |=  UHID_IMMED;
 594                 } else
 595                         sc->sc_state &= ~UHID_IMMED;
 596                 break;
 597
 598         case USB_GET_REPORT:
 599                 re = (struct usb_ctl_report *)addr;
 600                 switch (re->ucr_report) {
 601                 case UHID_INPUT_REPORT:
 602                         size = sc->sc_isize;
 603                         id = sc->sc_iid;
 604                         break;
 605                 case UHID_OUTPUT_REPORT:
 606                         size = sc->sc_osize;
 607                         id = sc->sc_oid;
 608                         break;
 609                 case UHID_FEATURE_REPORT:
 610                         size = sc->sc_fsize;
 611                         id = sc->sc_fid;
 612                         break;
 613                 default:
 614                         return (EINVAL);
 615                 }
 616                 err = usbd_get_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 617                           size);
 618                 if (err)
 619                         return (EIO);
 620                 break;
 621
 622         case USB_SET_REPORT:
 623                 re = (struct usb_ctl_report *)addr;
 624                 switch (re->ucr_report) {
 625                 case UHID_INPUT_REPORT:
 626                         size = sc->sc_isize;
 627                         id = sc->sc_iid;
 628                         break;
 629                 case UHID_OUTPUT_REPORT:
 630                         size = sc->sc_osize;
 631                         id = sc->sc_oid;
 632                         break;
 633                 case UHID_FEATURE_REPORT:
 634                         size = sc->sc_fsize;
 635                         id = sc->sc_fid;
 636                         break;
 637                 default:
 638                         return (EINVAL);
 639                 }
 640                 err = usbd_set_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 641                           size);
 642                 if (err)
 643                         return (EIO);
 644                 break;
 645
 646         case USB_GET_REPORT_ID:
 647                 *(int *)addr = 0;       /* XXX: we only support reportid 0? */
 648                 break;
 649
 650         default:
 651                 return (EINVAL);
 652         }
 653         return (0);
 654 }
 655
 656 int
 657 uhidioctl(struct dev_ioctl_args *ap)
 658 {
 659         cdev_t dev = ap->a_head.a_dev;
 660         struct uhid_softc *sc;
 661         int error;
 662
 663         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 664
 665         sc->sc_refcnt++;
 666         error = uhid_do_ioctl(sc, ap->a_cmd, ap->a_data, ap->a_fflag);
 667         if (--sc->sc_refcnt < 0)
 668                 usb_detach_wakeup(sc->sc_dev);
 669         return (error);
 670 }
 671
 672 static struct filterops uhidfiltops_read =
 673         { 1, NULL, uhidfilt_detach, uhidfilt_read };
 674 static struct filterops uhidfiltops_write =
 675         { 1, NULL, uhidfilt_detach, uhidfilt_write };
 676
 677 int
 678 uhidkqfilter(struct dev_kqfilter_args *ap)
 679 {
 680         cdev_t dev = ap->a_head.a_dev;
 681         struct knote *kn = ap->a_kn;
 682         struct uhid_softc *sc;
 683         struct klist *klist;
 684
 685         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 686
 687         if (sc->sc_dying) {
 688                 ap->a_result = 1;
 689                 return (0);
 690         }
 691
 692         ap->a_result = 0;
 693
 694         switch (kn->kn_filter) {
 695         case EVFILT_READ:
 696                 kn->kn_fop = &uhidfiltops_read;
 697                 kn->kn_hook = (caddr_t)sc;
 698                 break;
 699         case EVFILT_WRITE:
 700                 kn->kn_fop = &uhidfiltops_write;
 701                 kn->kn_hook = (caddr_t)sc;
 702                 break;
 703         default:
 704                 ap->a_result = EOPNOTSUPP;
 705                 return (0);
 706         }
 707
 708         crit_enter();
 709         klist = &sc->sc_rsel.si_note;
 710         SLIST_INSERT_HEAD(klist, kn, kn_selnext);
 711         crit_exit();
 712
 713         return (0);
 714 }
 715
 716 static void
 717 uhidfilt_detach(struct knote *kn)
 718 {
 719         cdev_t dev = (cdev_t)kn->kn_hook;
 720         struct uhid_softc *sc;
 721         struct klist *klist;
 722
 723         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 724
 725         crit_enter();
 726         klist = &sc->sc_rsel.si_note;
 727         SLIST_REMOVE(klist, kn, knote, kn_selnext);
 728         crit_exit();
 729 }
 730
 731 static int
 732 uhidfilt_read(struct knote *kn, long hint)
 733 {
 734         cdev_t dev = (cdev_t)kn->kn_hook;
 735         struct uhid_softc *sc;
 736         int ready = 0;
 737
 738         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 739
 740         crit_enter();
 741         if (sc->sc_q.c_cc > 0)
 742                 ready = 1;
 743         crit_exit();
 744
 745         return (ready);
 746 }
 747
 748 static int
 749 uhidfilt_write(struct knote *kn, long hint)
 750 {
 751         return (1);
 752 }
 753
 754 DRIVER_MODULE(uhid, uhub, uhid_driver, uhid_devclass, usbd_driver_load, 0);
 755