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/poll.h>
  67 #include <sys/event.h>
  68 #include <sys/sysctl.h>
  69 #include <sys/thread2.h>
  70
  71 #include <bus/usb/usb.h>
  72 #include <bus/usb/usbhid.h>
  73
  74 #include <bus/usb/usbdi.h>
  75 #include <bus/usb/usbdi_util.h>
  76 #include <bus/usb/hid.h>
  77
  78 /* Report descriptor for broken Wacom Graphire */
  79 #include <bus/usb/ugraphire_rdesc.h>
  80
  81 #ifdef USB_DEBUG
  82 #define DPRINTF(x)      if (uhiddebug) kprintf x
  83 #define DPRINTFN(n,x)   if (uhiddebug>(n)) kprintf x
  84 int     uhiddebug = 0;
  85 SYSCTL_NODE(_hw_usb, OID_AUTO, uhid, CTLFLAG_RW, 0, "USB uhid");
  86 SYSCTL_INT(_hw_usb_uhid, OID_AUTO, debug, CTLFLAG_RW,
  87            &uhiddebug, 0, "uhid debug level");
  88 #else
  89 #define DPRINTF(x)
  90 #define DPRINTFN(n,x)
  91 #endif
  92
  93 struct uhid_softc {
  94         device_t sc_dev;                        /* base device */
  95         usbd_device_handle sc_udev;
  96         usbd_interface_handle sc_iface; /* interface */
  97         usbd_pipe_handle sc_intrpipe;   /* interrupt pipe */
  98         int sc_ep_addr;
  99
 100         int sc_isize;
 101         int sc_osize;
 102         int sc_fsize;
 103         u_int8_t sc_iid;
 104         u_int8_t sc_oid;
 105         u_int8_t sc_fid;
 106
 107         u_char *sc_ibuf;
 108         u_char *sc_obuf;
 109
 110         void *sc_repdesc;
 111         int sc_repdesc_size;
 112
 113         struct clist sc_q;
 114         struct selinfo sc_rsel;
 115         struct proc *sc_async;  /* process that wants SIGIO */
 116         u_char sc_state;        /* driver state */
 117 #define UHID_OPEN       0x01    /* device is open */
 118 #define UHID_ASLP       0x02    /* waiting for device data */
 119 #define UHID_NEEDCLEAR  0x04    /* needs clearing endpoint stall */
 120 #define UHID_IMMED      0x08    /* return read data immediately */
 121
 122         int sc_refcnt;
 123         u_char sc_dying;
 124 };
 125
 126 #define UHIDUNIT(dev)   (minor(dev))
 127 #define UHID_CHUNK      128     /* chunk size for read */
 128 #define UHID_BSIZE      1020    /* buffer size */
 129
 130 d_open_t        uhidopen;
 131 d_close_t       uhidclose;
 132 d_read_t        uhidread;
 133 d_write_t       uhidwrite;
 134 d_ioctl_t       uhidioctl;
 135 d_poll_t        uhidpoll;
 136 d_kqfilter_t    uhidkqfilter;
 137
 138 static void uhidfilt_detach(struct knote *);
 139 static int uhidfilt_read(struct knote *, long);
 140 static int uhidfilt_write(struct knote *, long);
 141
 142 #define         UHID_CDEV_MAJOR 122
 143
 144 static struct dev_ops uhid_ops = {
 145         { "uhid", UHID_CDEV_MAJOR, D_KQFILTER },
 146         .d_open =       uhidopen,
 147         .d_close =      uhidclose,
 148         .d_read =       uhidread,
 149         .d_write =      uhidwrite,
 150         .d_ioctl =      uhidioctl,
 151         .d_poll =       uhidpoll,
 152         .d_kqfilter =   uhidkqfilter
 153 };
 154
 155 static void uhid_intr(usbd_xfer_handle, usbd_private_handle,
 156                            usbd_status);
 157
 158 static int uhid_do_read(struct uhid_softc *, struct uio *uio, int);
 159 static int uhid_do_write(struct uhid_softc *, struct uio *uio, int);
 160 static int uhid_do_ioctl(struct uhid_softc *, u_long, caddr_t, int);
 161
 162 static device_probe_t uhid_match;
 163 static device_attach_t uhid_attach;
 164 static device_detach_t uhid_detach;
 165
 166 static devclass_t uhid_devclass;
 167
 168 static kobj_method_t uhid_methods[] = {
 169         DEVMETHOD(device_probe, uhid_match),
 170         DEVMETHOD(device_attach, uhid_attach),
 171         DEVMETHOD(device_detach, uhid_detach),
 172         {0,0}
 173 };
 174
 175 static driver_t uhid_driver = {
 176         "uhid",
 177         uhid_methods,
 178         sizeof(struct uhid_softc)
 179 };
 180
 181 MODULE_DEPEND(uhid, usb, 1, 1, 1);
 182
 183 static int
 184 uhid_match(device_t self)
 185 {
 186         struct usb_attach_arg *uaa = device_get_ivars(self);
 187         usb_interface_descriptor_t *id;
 188
 189         if (uaa->iface == NULL)
 190                 return (UMATCH_NONE);
 191         id = usbd_get_interface_descriptor(uaa->iface);
 192         if (id == NULL || id->bInterfaceClass != UICLASS_HID)
 193                 return (UMATCH_NONE);
 194         if (uaa->matchlvl)
 195                 return (uaa->matchlvl);
 196         return (UMATCH_IFACECLASS_GENERIC);
 197 }
 198
 199 static int
 200 uhid_attach(device_t self)
 201 {
 202         struct uhid_softc *sc = device_get_softc(self);
 203         struct usb_attach_arg *uaa = device_get_ivars(self);
 204         usbd_interface_handle iface = uaa->iface;
 205         usb_endpoint_descriptor_t *ed;
 206         int size;
 207         void *desc;
 208         usbd_status err;
 209
 210         sc->sc_udev = uaa->device;
 211         sc->sc_iface = iface;
 212         sc->sc_dev = self;
 213
 214         ed = usbd_interface2endpoint_descriptor(iface, 0);
 215         if (ed == NULL) {
 216                 kprintf("%s: could not read endpoint descriptor\n",
 217                        device_get_nameunit(sc->sc_dev));
 218                 sc->sc_dying = 1;
 219                 return ENXIO;
 220         }
 221
 222         DPRINTFN(10,("uhid_attach: bLength=%d bDescriptorType=%d "
 223                      "bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d"
 224                      " bInterval=%d\n",
 225                      ed->bLength, ed->bDescriptorType,
 226                      ed->bEndpointAddress & UE_ADDR,
 227                      UE_GET_DIR(ed->bEndpointAddress)==UE_DIR_IN? "in" : "out",
 228                      ed->bmAttributes & UE_XFERTYPE,
 229                      UGETW(ed->wMaxPacketSize), ed->bInterval));
 230
 231         if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN ||
 232             (ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
 233                 kprintf("%s: unexpected endpoint\n", device_get_nameunit(sc->sc_dev));
 234                 sc->sc_dying = 1;
 235                 return ENXIO;
 236         }
 237
 238         sc->sc_ep_addr = ed->bEndpointAddress;
 239
 240         /* The report descriptor for the Wacom Graphire is broken. */
 241         if (uaa->vendor == 0x056a && uaa->product == 0x0010 /* &&
 242             uaa->revision == 0x???? */) { /* XXX should use revision */
 243                 size = sizeof uhid_graphire_report_descr;
 244                 desc = kmalloc(size, M_USBDEV, M_INTWAIT);
 245                 err = USBD_NORMAL_COMPLETION;
 246                 memcpy(desc, uhid_graphire_report_descr, size);
 247         } else {
 248                 desc = NULL;
 249                 err = usbd_read_report_desc(uaa->iface, &desc, &size,M_USBDEV);
 250         }
 251
 252         if (err) {
 253                 kprintf("%s: no report descriptor\n", device_get_nameunit(sc->sc_dev));
 254                 sc->sc_dying = 1;
 255                 return ENXIO;
 256         }
 257
 258         (void)usbd_set_idle(iface, 0, 0);
 259
 260         sc->sc_isize = hid_report_size(desc, size, hid_input,   &sc->sc_iid);
 261         sc->sc_osize = hid_report_size(desc, size, hid_output,  &sc->sc_oid);
 262         sc->sc_fsize = hid_report_size(desc, size, hid_feature, &sc->sc_fid);
 263
 264         sc->sc_repdesc = desc;
 265         sc->sc_repdesc_size = size;
 266
 267         make_dev(&uhid_ops, device_get_unit(self),
 268                  UID_ROOT, GID_OPERATOR,
 269                  0644, "uhid%d", device_get_unit(self));
 270
 271         return 0;
 272 }
 273
 274 static int
 275 uhid_detach(device_t self)
 276 {
 277         struct uhid_softc *sc = device_get_softc(self);
 278
 279         DPRINTF(("uhid_detach: sc=%p\n", sc));
 280
 281         sc->sc_dying = 1;
 282         if (sc->sc_intrpipe != NULL)
 283                 usbd_abort_pipe(sc->sc_intrpipe);
 284
 285         if (sc->sc_state & UHID_OPEN) {
 286                 crit_enter();
 287                 if (--sc->sc_refcnt >= 0) {
 288                         /* Wake everyone */
 289                         wakeup(&sc->sc_q);
 290                         /* Wait for processes to go away. */
 291                         usb_detach_wait(sc->sc_dev);
 292                 }
 293                 crit_exit();
 294         }
 295
 296         dev_ops_remove_minor(&uhid_ops, device_get_unit(self));
 297
 298         if (sc->sc_repdesc)
 299                 kfree(sc->sc_repdesc, M_USBDEV);
 300
 301         return (0);
 302 }
 303
 304 void
 305 uhid_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
 306 {
 307         struct uhid_softc *sc = addr;
 308
 309 #ifdef USB_DEBUG
 310         if (uhiddebug > 5) {
 311                 u_int32_t cc, i;
 312
 313                 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
 314                 DPRINTF(("uhid_intr: status=%d cc=%d\n", status, cc));
 315                 DPRINTF(("uhid_intr: data ="));
 316                 for (i = 0; i < cc; i++)
 317                         DPRINTF((" %02x", sc->sc_ibuf[i]));
 318                 DPRINTF(("\n"));
 319         }
 320 #endif
 321
 322         if (status == USBD_CANCELLED)
 323                 return;
 324
 325         if (status != USBD_NORMAL_COMPLETION) {
 326                 DPRINTF(("uhid_intr: status=%d\n", status));
 327                 if (status == USBD_STALLED)
 328                     sc->sc_state |= UHID_NEEDCLEAR;
 329                 return;
 330         }
 331
 332         (void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q);
 333
 334         if (sc->sc_state & UHID_ASLP) {
 335                 sc->sc_state &= ~UHID_ASLP;
 336                 DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q));
 337                 wakeup(&sc->sc_q);
 338         }
 339         selwakeup(&sc->sc_rsel);
 340         if (sc->sc_async != NULL) {
 341                 DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n", sc->sc_async));
 342                 ksignal(sc->sc_async, SIGIO);
 343         }
 344 }
 345
 346 int
 347 uhidopen(struct dev_open_args *ap)
 348 {
 349         cdev_t dev = ap->a_head.a_dev;
 350         struct uhid_softc *sc;
 351         usbd_status err;
 352
 353         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 354         if (sc == NULL)
 355                 return (ENXIO);
 356
 357         DPRINTF(("uhidopen: sc=%p\n", sc));
 358
 359         if (sc->sc_dying)
 360                 return (ENXIO);
 361
 362         if (sc->sc_state & UHID_OPEN)
 363                 return (EBUSY);
 364         sc->sc_state |= UHID_OPEN;
 365
 366         if ((clist_alloc_cblocks(&sc->sc_q, UHID_BSIZE,
 367                                  UHID_BSIZE), 0) == -1) {
 368                 sc->sc_state &= ~UHID_OPEN;
 369                 return (ENOMEM);
 370         }
 371
 372         sc->sc_ibuf = kmalloc(sc->sc_isize, M_USBDEV, M_WAITOK);
 373         sc->sc_obuf = kmalloc(sc->sc_osize, M_USBDEV, M_WAITOK);
 374
 375         /* Set up interrupt pipe. */
 376         err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr,
 377                   USBD_SHORT_XFER_OK, &sc->sc_intrpipe, sc, sc->sc_ibuf,
 378                   sc->sc_isize, uhid_intr, USBD_DEFAULT_INTERVAL);
 379         if (err) {
 380                 DPRINTF(("uhidopen: usbd_open_pipe_intr failed, "
 381                          "error=%d\n",err));
 382                 kfree(sc->sc_ibuf, M_USBDEV);
 383                 kfree(sc->sc_obuf, M_USBDEV);
 384                 sc->sc_ibuf = sc->sc_obuf = NULL;
 385
 386                 sc->sc_state &= ~UHID_OPEN;
 387                 return (EIO);
 388         }
 389
 390         sc->sc_state &= ~UHID_IMMED;
 391
 392         sc->sc_async = 0;
 393
 394         return (0);
 395 }
 396
 397 int
 398 uhidclose(struct dev_close_args *ap)
 399 {
 400         cdev_t dev = ap->a_head.a_dev;
 401         struct uhid_softc *sc;
 402
 403         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 404
 405         DPRINTF(("uhidclose: sc=%p\n", sc));
 406
 407         /* Disable interrupts. */
 408         usbd_abort_pipe(sc->sc_intrpipe);
 409         usbd_close_pipe(sc->sc_intrpipe);
 410         sc->sc_intrpipe = 0;
 411
 412         ndflush(&sc->sc_q, sc->sc_q.c_cc);
 413         clist_free_cblocks(&sc->sc_q);
 414
 415         kfree(sc->sc_ibuf, M_USBDEV);
 416         kfree(sc->sc_obuf, M_USBDEV);
 417         sc->sc_ibuf = sc->sc_obuf = NULL;
 418
 419         sc->sc_state &= ~UHID_OPEN;
 420
 421         sc->sc_async = 0;
 422
 423         return (0);
 424 }
 425
 426 int
 427 uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag)
 428 {
 429         int error = 0;
 430         size_t length;
 431         u_char buffer[UHID_CHUNK];
 432         usbd_status err;
 433
 434         DPRINTFN(1, ("uhidread\n"));
 435         if (sc->sc_state & UHID_IMMED) {
 436                 DPRINTFN(1, ("uhidread immed\n"));
 437
 438                 err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 439                           sc->sc_iid, buffer, sc->sc_isize);
 440                 if (err)
 441                         return (EIO);
 442                 return (uiomove(buffer, sc->sc_isize, uio));
 443         }
 444
 445         crit_enter();
 446         while (sc->sc_q.c_cc == 0) {
 447                 if (flag & IO_NDELAY) {
 448                         crit_exit();
 449                         return (EWOULDBLOCK);
 450                 }
 451                 sc->sc_state |= UHID_ASLP;
 452                 DPRINTFN(5, ("uhidread: sleep on %p\n", &sc->sc_q));
 453                 error = tsleep(&sc->sc_q, PCATCH, "uhidrea", 0);
 454                 DPRINTFN(5, ("uhidread: woke, error=%d\n", error));
 455                 if (sc->sc_dying)
 456                         error = EIO;
 457                 if (error) {
 458                         sc->sc_state &= ~UHID_ASLP;
 459                         break;
 460                 }
 461                 if (sc->sc_state & UHID_NEEDCLEAR) {
 462                         DPRINTFN(-1,("uhidread: clearing stall\n"));
 463                         sc->sc_state &= ~UHID_NEEDCLEAR;
 464                         usbd_clear_endpoint_stall(sc->sc_intrpipe);
 465                 }
 466         }
 467         crit_exit();
 468
 469         /* Transfer as many chunks as possible. */
 470         while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) {
 471                 length = szmin(sc->sc_q.c_cc, uio->uio_resid);
 472                 if (length > sizeof(buffer))
 473                         length = sizeof(buffer);
 474
 475                 /* Remove a small chunk from the input queue. */
 476                 (void) q_to_b(&sc->sc_q, buffer, length);
 477                 DPRINTFN(5, ("uhidread: got %lu chars\n", (u_long)length));
 478
 479                 /* Copy the data to the user process. */
 480                 if ((error = uiomove(buffer, length, uio)) != 0)
 481                         break;
 482         }
 483
 484         return (error);
 485 }
 486
 487 int
 488 uhidread(struct dev_read_args *ap)
 489 {
 490         cdev_t dev = ap->a_head.a_dev;
 491         struct uhid_softc *sc;
 492         int error;
 493
 494         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 495
 496         sc->sc_refcnt++;
 497         error = uhid_do_read(sc, ap->a_uio, ap->a_ioflag);
 498         if (--sc->sc_refcnt < 0)
 499                 usb_detach_wakeup(sc->sc_dev);
 500         return (error);
 501 }
 502
 503 int
 504 uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag)
 505 {
 506         int error;
 507         int size;
 508         usbd_status err;
 509
 510         DPRINTFN(1, ("uhidwrite\n"));
 511
 512         if (sc->sc_dying)
 513                 return (EIO);
 514
 515         size = sc->sc_osize;
 516         if (uio->uio_resid != size)
 517                 return (EINVAL);
 518         error = uiomove(sc->sc_obuf, size, uio);
 519         if (!error) {
 520                 if (sc->sc_oid)
 521                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 522                                   sc->sc_obuf[0], sc->sc_obuf+1, size-1);
 523                 else
 524                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 525                                   0, sc->sc_obuf, size);
 526                 if (err)
 527                         error = EIO;
 528         }
 529
 530         return (error);
 531 }
 532
 533 int
 534 uhidwrite(struct dev_write_args *ap)
 535 {
 536         cdev_t dev = ap->a_head.a_dev;
 537         struct uhid_softc *sc;
 538         int error;
 539
 540         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 541
 542         sc->sc_refcnt++;
 543         error = uhid_do_write(sc, ap->a_uio, ap->a_ioflag);
 544         if (--sc->sc_refcnt < 0)
 545                 usb_detach_wakeup(sc->sc_dev);
 546         return (error);
 547 }
 548
 549 int
 550 uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, caddr_t addr, int flag)
 551 {
 552         struct usb_ctl_report_desc *rd;
 553         struct usb_ctl_report *re;
 554         int size, id;
 555         usbd_status err;
 556
 557         DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd));
 558
 559         if (sc->sc_dying)
 560                 return (EIO);
 561
 562         switch (cmd) {
 563         case FIOASYNC:
 564                 if (*(int *)addr) {
 565                         if (sc->sc_async != NULL)
 566                                 return (EBUSY);
 567                         sc->sc_async = curproc;
 568                         DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n", sc->sc_async));
 569                 } else
 570                         sc->sc_async = NULL;
 571                 break;
 572
 573         /* XXX this is not the most general solution. */
 574         case TIOCSPGRP:
 575                 if (sc->sc_async == NULL)
 576                         return (EINVAL);
 577                 if (*(int *)addr != sc->sc_async->p_pgid)
 578                         return (EPERM);
 579                 break;
 580
 581         case USB_GET_REPORT_DESC:
 582                 rd = (struct usb_ctl_report_desc *)addr;
 583                 size = min(sc->sc_repdesc_size, sizeof rd->ucrd_data);
 584                 rd->ucrd_size = size;
 585                 memcpy(rd->ucrd_data, sc->sc_repdesc, size);
 586                 break;
 587
 588         case USB_SET_IMMED:
 589                 if (*(int *)addr) {
 590                         /* XXX should read into ibuf, but does it matter? */
 591                         err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 592                                   sc->sc_iid, sc->sc_ibuf, sc->sc_isize);
 593                         if (err)
 594                                 return (EOPNOTSUPP);
 595
 596                         sc->sc_state |=  UHID_IMMED;
 597                 } else
 598                         sc->sc_state &= ~UHID_IMMED;
 599                 break;
 600
 601         case USB_GET_REPORT:
 602                 re = (struct usb_ctl_report *)addr;
 603                 switch (re->ucr_report) {
 604                 case UHID_INPUT_REPORT:
 605                         size = sc->sc_isize;
 606                         id = sc->sc_iid;
 607                         break;
 608                 case UHID_OUTPUT_REPORT:
 609                         size = sc->sc_osize;
 610                         id = sc->sc_oid;
 611                         break;
 612                 case UHID_FEATURE_REPORT:
 613                         size = sc->sc_fsize;
 614                         id = sc->sc_fid;
 615                         break;
 616                 default:
 617                         return (EINVAL);
 618                 }
 619                 err = usbd_get_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 620                           size);
 621                 if (err)
 622                         return (EIO);
 623                 break;
 624
 625         case USB_SET_REPORT:
 626                 re = (struct usb_ctl_report *)addr;
 627                 switch (re->ucr_report) {
 628                 case UHID_INPUT_REPORT:
 629                         size = sc->sc_isize;
 630                         id = sc->sc_iid;
 631                         break;
 632                 case UHID_OUTPUT_REPORT:
 633                         size = sc->sc_osize;
 634                         id = sc->sc_oid;
 635                         break;
 636                 case UHID_FEATURE_REPORT:
 637                         size = sc->sc_fsize;
 638                         id = sc->sc_fid;
 639                         break;
 640                 default:
 641                         return (EINVAL);
 642                 }
 643                 err = usbd_set_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 644                           size);
 645                 if (err)
 646                         return (EIO);
 647                 break;
 648
 649         case USB_GET_REPORT_ID:
 650                 *(int *)addr = 0;       /* XXX: we only support reportid 0? */
 651                 break;
 652
 653         default:
 654                 return (EINVAL);
 655         }
 656         return (0);
 657 }
 658
 659 int
 660 uhidioctl(struct dev_ioctl_args *ap)
 661 {
 662         cdev_t dev = ap->a_head.a_dev;
 663         struct uhid_softc *sc;
 664         int error;
 665
 666         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 667
 668         sc->sc_refcnt++;
 669         error = uhid_do_ioctl(sc, ap->a_cmd, ap->a_data, ap->a_fflag);
 670         if (--sc->sc_refcnt < 0)
 671                 usb_detach_wakeup(sc->sc_dev);
 672         return (error);
 673 }
 674
 675 int
 676 uhidpoll(struct dev_poll_args *ap)
 677 {
 678         cdev_t dev = ap->a_head.a_dev;
 679         struct uhid_softc *sc;
 680         int revents = 0;
 681
 682         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 683
 684         if (sc->sc_dying)
 685                 return (EIO);
 686
 687         crit_enter();
 688         if (ap->a_events & (POLLOUT | POLLWRNORM))
 689                 revents |= ap->a_events & (POLLOUT | POLLWRNORM);
 690         if (ap->a_events & (POLLIN | POLLRDNORM)) {
 691                 if (sc->sc_q.c_cc > 0)
 692                         revents |= ap->a_events & (POLLIN | POLLRDNORM);
 693                 else
 694                         selrecord(curthread, &sc->sc_rsel);
 695         }
 696         crit_exit();
 697         ap->a_events = revents;
 698         return (0);
 699 }
 700
 701 static struct filterops uhidfiltops_read =
 702         { 1, NULL, uhidfilt_detach, uhidfilt_read };
 703 static struct filterops uhidfiltops_write =
 704         { 1, NULL, uhidfilt_detach, uhidfilt_write };
 705
 706 int
 707 uhidkqfilter(struct dev_kqfilter_args *ap)
 708 {
 709         cdev_t dev = ap->a_head.a_dev;
 710         struct knote *kn = ap->a_kn;
 711         struct uhid_softc *sc;
 712         struct klist *klist;
 713
 714         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 715
 716         if (sc->sc_dying) {
 717                 ap->a_result = 1;
 718                 return (0);
 719         }
 720
 721         ap->a_result = 0;
 722
 723         switch (kn->kn_filter) {
 724         case EVFILT_READ:
 725                 kn->kn_fop = &uhidfiltops_read;
 726                 kn->kn_hook = (caddr_t)sc;
 727                 break;
 728         case EVFILT_WRITE:
 729                 kn->kn_fop = &uhidfiltops_write;
 730                 kn->kn_hook = (caddr_t)sc;
 731                 break;
 732         default:
 733                 ap->a_result = EOPNOTSUPP;
 734                 return (0);
 735         }
 736
 737         crit_enter();
 738         klist = &sc->sc_rsel.si_note;
 739         SLIST_INSERT_HEAD(klist, kn, kn_selnext);
 740         crit_exit();
 741
 742         return (0);
 743 }
 744
 745 static void
 746 uhidfilt_detach(struct knote *kn)
 747 {
 748         cdev_t dev = (cdev_t)kn->kn_hook;
 749         struct uhid_softc *sc;
 750         struct klist *klist;
 751
 752         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 753
 754         crit_enter();
 755         klist = &sc->sc_rsel.si_note;
 756         SLIST_REMOVE(klist, kn, knote, kn_selnext);
 757         crit_exit();
 758 }
 759
 760 static int
 761 uhidfilt_read(struct knote *kn, long hint)
 762 {
 763         cdev_t dev = (cdev_t)kn->kn_hook;
 764         struct uhid_softc *sc;
 765         int ready = 0;
 766
 767         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 768
 769         crit_enter();
 770         if (sc->sc_q.c_cc > 0)
 771                 ready = 1;
 772         crit_exit();
 773
 774         return (ready);
 775 }
 776
 777 static int
 778 uhidfilt_write(struct knote *kn, long hint)
 779 {
 780         return (1);
 781 }
 782
 783 DRIVER_MODULE(uhid, uhub, uhid_driver, uhid_devclass, usbd_driver_load, 0);
 784