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 1.29 2007/07/03 19:28:16 hasso Exp $
   5  */
   6
   7 /* Also already merged from NetBSD:
   8  *      $NetBSD: uhid.c,v 1.54 2002/09/23 05:51:21 simonb Exp $
   9  */
  10
  11 /*
  12  * Copyright (c) 1998 The NetBSD Foundation, Inc.
  13  * All rights reserved.
  14  *
  15  * This code is derived from software contributed to The NetBSD Foundation
  16  * by Lennart Augustsson (lennart@augustsson.net) at
  17  * Carlstedt Research & Technology.
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions
  21  * are met:
  22  * 1. Redistributions of source code must retain the above copyright
  23  *    notice, this list of conditions and the following disclaimer.
  24  * 2. Redistributions in binary form must reproduce the above copyright
  25  *    notice, this list of conditions and the following disclaimer in the
  26  *    documentation and/or other materials provided with the distribution.
  27  * 3. All advertising materials mentioning features or use of this software
  28  *    must display the following acknowledgement:
  29  *        This product includes software developed by the NetBSD
  30  *        Foundation, Inc. and its contributors.
  31  * 4. Neither the name of The NetBSD Foundation nor the names of its
  32  *    contributors may be used to endorse or promote products derived
  33  *    from this software without specific prior written permission.
  34  *
  35  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  36  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  37  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  38  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  39  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  40  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  41  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  42  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  43  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  44  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  45  * POSSIBILITY OF SUCH DAMAGE.
  46  */
  47
  48 /*
  49  * HID spec: http://www.usb.org/developers/data/usbhid10.pdf
  50  */
  51
  52 #include <sys/param.h>
  53 #include <sys/systm.h>
  54 #include <sys/kernel.h>
  55 #include <sys/lock.h>
  56 #include <sys/malloc.h>
  57 #include <sys/signalvar.h>
  58 #include <sys/ioccom.h>
  59 #include <sys/filio.h>
  60 #include <sys/module.h>
  61 #include <sys/bus.h>
  62 #include <sys/ioccom.h>
  63 #include <sys/conf.h>
  64 #include <sys/tty.h>
  65 #include <sys/select.h>
  66 #include <sys/proc.h>
  67 #include <sys/vnode.h>
  68 #include <sys/poll.h>
  69 #include <sys/sysctl.h>
  70 #include <sys/thread2.h>
  71
  72 #include <bus/usb/usb.h>
  73 #include <bus/usb/usbhid.h>
  74
  75 #include <bus/usb/usbdevs.h>
  76 #include <bus/usb/usbdi.h>
  77 #include <bus/usb/usbdi_util.h>
  78 #include <bus/usb/hid.h>
  79
  80 /* Report descriptor for broken Wacom Graphire */
  81 #include <bus/usb/ugraphire_rdesc.h>
  82
  83 #ifdef USB_DEBUG
  84 #define DPRINTF(x)      if (uhiddebug) kprintf x
  85 #define DPRINTFN(n,x)   if (uhiddebug>(n)) kprintf x
  86 int     uhiddebug = 0;
  87 SYSCTL_NODE(_hw_usb, OID_AUTO, uhid, CTLFLAG_RW, 0, "USB uhid");
  88 SYSCTL_INT(_hw_usb_uhid, OID_AUTO, debug, CTLFLAG_RW,
  89            &uhiddebug, 0, "uhid debug level");
  90 #else
  91 #define DPRINTF(x)
  92 #define DPRINTFN(n,x)
  93 #endif
  94
  95 struct uhid_softc {
  96         device_t sc_dev;                        /* base device */
  97         usbd_device_handle sc_udev;
  98         usbd_interface_handle sc_iface; /* interface */
  99         usbd_pipe_handle sc_intrpipe;   /* interrupt pipe */
 100         int sc_ep_addr;
 101
 102         int sc_isize;
 103         int sc_osize;
 104         int sc_fsize;
 105         u_int8_t sc_iid;
 106         u_int8_t sc_oid;
 107         u_int8_t sc_fid;
 108
 109         u_char *sc_ibuf;
 110         u_char *sc_obuf;
 111
 112         void *sc_repdesc;
 113         int sc_repdesc_size;
 114
 115         struct clist sc_q;
 116         struct selinfo sc_rsel;
 117         struct proc *sc_async;  /* process that wants SIGIO */
 118         u_char sc_state;        /* driver state */
 119 #define UHID_OPEN       0x01    /* device is open */
 120 #define UHID_ASLP       0x02    /* waiting for device data */
 121 #define UHID_NEEDCLEAR  0x04    /* needs clearing endpoint stall */
 122 #define UHID_IMMED      0x08    /* return read data immediately */
 123
 124         int sc_refcnt;
 125         u_char sc_dying;
 126 };
 127
 128 #define UHIDUNIT(dev)   (minor(dev))
 129 #define UHID_CHUNK      128     /* chunk size for read */
 130 #define UHID_BSIZE      1020    /* buffer size */
 131
 132 d_open_t        uhidopen;
 133 d_close_t       uhidclose;
 134 d_read_t        uhidread;
 135 d_write_t       uhidwrite;
 136 d_ioctl_t       uhidioctl;
 137 d_poll_t        uhidpoll;
 138
 139 #define         UHID_CDEV_MAJOR 122
 140
 141 static struct dev_ops uhid_ops = {
 142         { "uhid", UHID_CDEV_MAJOR, 0 },
 143         .d_open =       uhidopen,
 144         .d_close =      uhidclose,
 145         .d_read =       uhidread,
 146         .d_write =      uhidwrite,
 147         .d_ioctl =      uhidioctl,
 148         .d_poll =       uhidpoll,
 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_interface_descriptor_t *id;
 202         usb_endpoint_descriptor_t *ed;
 203         int size;
 204         void *desc;
 205         usbd_status err;
 206         char devinfo[1024];
 207
 208         sc->sc_udev = uaa->device;
 209         sc->sc_iface = iface;
 210         id = usbd_get_interface_descriptor(iface);
 211         usbd_devinfo(uaa->device, 0, devinfo);
 212         sc->sc_dev = self;
 213         device_set_desc_copy(self, devinfo);
 214         kprintf("%s: %s, iclass %d/%d\n", device_get_nameunit(sc->sc_dev),
 215                devinfo, id->bInterfaceClass, id->bInterfaceSubClass);
 216
 217         ed = usbd_interface2endpoint_descriptor(iface, 0);
 218         if (ed == NULL) {
 219                 kprintf("%s: could not read endpoint descriptor\n",
 220                        device_get_nameunit(sc->sc_dev));
 221                 sc->sc_dying = 1;
 222                 return ENXIO;
 223         }
 224
 225         DPRINTFN(10,("uhid_attach: bLength=%d bDescriptorType=%d "
 226                      "bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d"
 227                      " bInterval=%d\n",
 228                      ed->bLength, ed->bDescriptorType,
 229                      ed->bEndpointAddress & UE_ADDR,
 230                      UE_GET_DIR(ed->bEndpointAddress)==UE_DIR_IN? "in" : "out",
 231                      ed->bmAttributes & UE_XFERTYPE,
 232                      UGETW(ed->wMaxPacketSize), ed->bInterval));
 233
 234         if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN ||
 235             (ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
 236                 kprintf("%s: unexpected endpoint\n", device_get_nameunit(sc->sc_dev));
 237                 sc->sc_dying = 1;
 238                 return ENXIO;
 239         }
 240
 241         sc->sc_ep_addr = ed->bEndpointAddress;
 242
 243         if (uaa->vendor == USB_VENDOR_WACOM &&
 244             uaa->product == USB_PRODUCT_WACOM_GRAPHIRE /* &&
 245             uaa->revision == 0x???? */) { /* XXX should use revision */
 246                 /* The report descriptor for the Wacom Graphire is broken. */
 247                 size = sizeof uhid_graphire_report_descr;
 248                 desc = kmalloc(size, M_USBDEV, M_INTWAIT);
 249                 err = USBD_NORMAL_COMPLETION;
 250                 memcpy(desc, uhid_graphire_report_descr, size);
 251         } else {
 252                 desc = NULL;
 253                 err = usbd_read_report_desc(uaa->iface, &desc, &size,M_USBDEV);
 254         }
 255
 256         if (err) {
 257                 kprintf("%s: no report descriptor\n", device_get_nameunit(sc->sc_dev));
 258                 sc->sc_dying = 1;
 259                 return ENXIO;
 260         }
 261
 262         (void)usbd_set_idle(iface, 0, 0);
 263
 264         sc->sc_isize = hid_report_size(desc, size, hid_input,   &sc->sc_iid);
 265         sc->sc_osize = hid_report_size(desc, size, hid_output,  &sc->sc_oid);
 266         sc->sc_fsize = hid_report_size(desc, size, hid_feature, &sc->sc_fid);
 267
 268         sc->sc_repdesc = desc;
 269         sc->sc_repdesc_size = size;
 270
 271         dev_ops_add(&uhid_ops, -1, device_get_unit(self));
 272         make_dev(&uhid_ops, device_get_unit(self),
 273                 UID_ROOT, GID_OPERATOR,
 274                 0644, "uhid%d", device_get_unit(self));
 275
 276         return 0;
 277 }
 278
 279 static int
 280 uhid_detach(device_t self)
 281 {
 282         struct uhid_softc *sc = device_get_softc(self);
 283
 284         DPRINTF(("uhid_detach: sc=%p\n", sc));
 285
 286         sc->sc_dying = 1;
 287         if (sc->sc_intrpipe != NULL)
 288                 usbd_abort_pipe(sc->sc_intrpipe);
 289
 290         if (sc->sc_state & UHID_OPEN) {
 291                 crit_enter();
 292                 if (--sc->sc_refcnt >= 0) {
 293                         /* Wake everyone */
 294                         wakeup(&sc->sc_q);
 295                         /* Wait for processes to go away. */
 296                         usb_detach_wait(sc->sc_dev);
 297                 }
 298                 crit_exit();
 299         }
 300
 301         dev_ops_remove(&uhid_ops, -1, device_get_unit(self));
 302
 303         if (sc->sc_repdesc)
 304                 kfree(sc->sc_repdesc, M_USBDEV);
 305
 306         return (0);
 307 }
 308
 309 void
 310 uhid_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
 311 {
 312         struct uhid_softc *sc = addr;
 313
 314 #ifdef USB_DEBUG
 315         if (uhiddebug > 5) {
 316                 u_int32_t cc, i;
 317
 318                 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
 319                 DPRINTF(("uhid_intr: status=%d cc=%d\n", status, cc));
 320                 DPRINTF(("uhid_intr: data ="));
 321                 for (i = 0; i < cc; i++)
 322                         DPRINTF((" %02x", sc->sc_ibuf[i]));
 323                 DPRINTF(("\n"));
 324         }
 325 #endif
 326
 327         if (status == USBD_CANCELLED)
 328                 return;
 329
 330         if (status != USBD_NORMAL_COMPLETION) {
 331                 DPRINTF(("uhid_intr: status=%d\n", status));
 332                 if (status == USBD_STALLED)
 333                     sc->sc_state |= UHID_NEEDCLEAR;
 334                 return;
 335         }
 336
 337         (void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q);
 338
 339         if (sc->sc_state & UHID_ASLP) {
 340                 sc->sc_state &= ~UHID_ASLP;
 341                 DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q));
 342                 wakeup(&sc->sc_q);
 343         }
 344         selwakeup(&sc->sc_rsel);
 345         if (sc->sc_async != NULL) {
 346                 DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n", sc->sc_async));
 347                 ksignal(sc->sc_async, SIGIO);
 348         }
 349 }
 350
 351 int
 352 uhidopen(struct dev_open_args *ap)
 353 {
 354         cdev_t dev = ap->a_head.a_dev;
 355         struct uhid_softc *sc;
 356         usbd_status err;
 357
 358         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 359         if (sc == NULL)
 360                 return (ENXIO);
 361
 362         DPRINTF(("uhidopen: sc=%p\n", sc));
 363
 364         if (sc->sc_dying)
 365                 return (ENXIO);
 366
 367         if (sc->sc_state & UHID_OPEN)
 368                 return (EBUSY);
 369         sc->sc_state |= UHID_OPEN;
 370
 371         if ((clist_alloc_cblocks(&sc->sc_q, UHID_BSIZE,
 372                                  UHID_BSIZE), 0) == -1) {
 373                 sc->sc_state &= ~UHID_OPEN;
 374                 return (ENOMEM);
 375         }
 376
 377         sc->sc_ibuf = kmalloc(sc->sc_isize, M_USBDEV, M_WAITOK);
 378         sc->sc_obuf = kmalloc(sc->sc_osize, M_USBDEV, M_WAITOK);
 379
 380         /* Set up interrupt pipe. */
 381         err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr,
 382                   USBD_SHORT_XFER_OK, &sc->sc_intrpipe, sc, sc->sc_ibuf,
 383                   sc->sc_isize, uhid_intr, USBD_DEFAULT_INTERVAL);
 384         if (err) {
 385                 DPRINTF(("uhidopen: usbd_open_pipe_intr failed, "
 386                          "error=%d\n",err));
 387                 kfree(sc->sc_ibuf, M_USBDEV);
 388                 kfree(sc->sc_obuf, M_USBDEV);
 389                 sc->sc_ibuf = sc->sc_obuf = NULL;
 390
 391                 sc->sc_state &= ~UHID_OPEN;
 392                 return (EIO);
 393         }
 394
 395         sc->sc_state &= ~UHID_IMMED;
 396
 397         sc->sc_async = 0;
 398
 399         return (0);
 400 }
 401
 402 int
 403 uhidclose(struct dev_close_args *ap)
 404 {
 405         cdev_t dev = ap->a_head.a_dev;
 406         struct uhid_softc *sc;
 407
 408         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 409
 410         DPRINTF(("uhidclose: sc=%p\n", sc));
 411
 412         /* Disable interrupts. */
 413         usbd_abort_pipe(sc->sc_intrpipe);
 414         usbd_close_pipe(sc->sc_intrpipe);
 415         sc->sc_intrpipe = 0;
 416
 417         ndflush(&sc->sc_q, sc->sc_q.c_cc);
 418         clist_free_cblocks(&sc->sc_q);
 419
 420         kfree(sc->sc_ibuf, M_USBDEV);
 421         kfree(sc->sc_obuf, M_USBDEV);
 422         sc->sc_ibuf = sc->sc_obuf = NULL;
 423
 424         sc->sc_state &= ~UHID_OPEN;
 425
 426         sc->sc_async = 0;
 427
 428         return (0);
 429 }
 430
 431 int
 432 uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag)
 433 {
 434         int error = 0;
 435         size_t length;
 436         u_char buffer[UHID_CHUNK];
 437         usbd_status err;
 438
 439         DPRINTFN(1, ("uhidread\n"));
 440         if (sc->sc_state & UHID_IMMED) {
 441                 DPRINTFN(1, ("uhidread immed\n"));
 442
 443                 err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 444                           sc->sc_iid, buffer, sc->sc_isize);
 445                 if (err)
 446                         return (EIO);
 447                 return (uiomove(buffer, sc->sc_isize, uio));
 448         }
 449
 450         crit_enter();
 451         while (sc->sc_q.c_cc == 0) {
 452                 if (flag & IO_NDELAY) {
 453                         crit_exit();
 454                         return (EWOULDBLOCK);
 455                 }
 456                 sc->sc_state |= UHID_ASLP;
 457                 DPRINTFN(5, ("uhidread: sleep on %p\n", &sc->sc_q));
 458                 error = tsleep(&sc->sc_q, PCATCH, "uhidrea", 0);
 459                 DPRINTFN(5, ("uhidread: woke, error=%d\n", error));
 460                 if (sc->sc_dying)
 461                         error = EIO;
 462                 if (error) {
 463                         sc->sc_state &= ~UHID_ASLP;
 464                         break;
 465                 }
 466                 if (sc->sc_state & UHID_NEEDCLEAR) {
 467                         DPRINTFN(-1,("uhidread: clearing stall\n"));
 468                         sc->sc_state &= ~UHID_NEEDCLEAR;
 469                         usbd_clear_endpoint_stall(sc->sc_intrpipe);
 470                 }
 471         }
 472         crit_exit();
 473
 474         /* Transfer as many chunks as possible. */
 475         while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) {
 476                 length = min(sc->sc_q.c_cc, uio->uio_resid);
 477                 if (length > sizeof(buffer))
 478                         length = sizeof(buffer);
 479
 480                 /* Remove a small chunk from the input queue. */
 481                 (void) q_to_b(&sc->sc_q, buffer, length);
 482                 DPRINTFN(5, ("uhidread: got %lu chars\n", (u_long)length));
 483
 484                 /* Copy the data to the user process. */
 485                 if ((error = uiomove(buffer, length, uio)) != 0)
 486                         break;
 487         }
 488
 489         return (error);
 490 }
 491
 492 int
 493 uhidread(struct dev_read_args *ap)
 494 {
 495         cdev_t dev = ap->a_head.a_dev;
 496         struct uhid_softc *sc;
 497         int error;
 498
 499         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 500
 501         sc->sc_refcnt++;
 502         error = uhid_do_read(sc, ap->a_uio, ap->a_ioflag);
 503         if (--sc->sc_refcnt < 0)
 504                 usb_detach_wakeup(sc->sc_dev);
 505         return (error);
 506 }
 507
 508 int
 509 uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag)
 510 {
 511         int error;
 512         int size;
 513         usbd_status err;
 514
 515         DPRINTFN(1, ("uhidwrite\n"));
 516
 517         if (sc->sc_dying)
 518                 return (EIO);
 519
 520         size = sc->sc_osize;
 521         error = 0;
 522         if (uio->uio_resid != size)
 523                 return (EINVAL);
 524         error = uiomove(sc->sc_obuf, size, uio);
 525         if (!error) {
 526                 if (sc->sc_oid)
 527                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 528                                   sc->sc_obuf[0], sc->sc_obuf+1, size-1);
 529                 else
 530                         err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
 531                                   0, sc->sc_obuf, size);
 532                 if (err)
 533                         error = EIO;
 534         }
 535
 536         return (error);
 537 }
 538
 539 int
 540 uhidwrite(struct dev_write_args *ap)
 541 {
 542         cdev_t dev = ap->a_head.a_dev;
 543         struct uhid_softc *sc;
 544         int error;
 545
 546         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 547
 548         sc->sc_refcnt++;
 549         error = uhid_do_write(sc, ap->a_uio, ap->a_ioflag);
 550         if (--sc->sc_refcnt < 0)
 551                 usb_detach_wakeup(sc->sc_dev);
 552         return (error);
 553 }
 554
 555 int
 556 uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, caddr_t addr, int flag)
 557 {
 558         struct usb_ctl_report_desc *rd;
 559         struct usb_ctl_report *re;
 560         int size, id;
 561         usbd_status err;
 562
 563         DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd));
 564
 565         if (sc->sc_dying)
 566                 return (EIO);
 567
 568         switch (cmd) {
 569         case FIOASYNC:
 570                 if (*(int *)addr) {
 571                         if (sc->sc_async != NULL)
 572                                 return (EBUSY);
 573                         sc->sc_async = curproc;
 574                         DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n", sc->sc_async));
 575                 } else
 576                         sc->sc_async = NULL;
 577                 break;
 578
 579         /* XXX this is not the most general solution. */
 580         case TIOCSPGRP:
 581                 if (sc->sc_async == NULL)
 582                         return (EINVAL);
 583                 if (*(int *)addr != sc->sc_async->p_pgid)
 584                         return (EPERM);
 585                 break;
 586
 587         case USB_GET_REPORT_DESC:
 588                 rd = (struct usb_ctl_report_desc *)addr;
 589                 size = min(sc->sc_repdesc_size, sizeof rd->ucrd_data);
 590                 rd->ucrd_size = size;
 591                 memcpy(rd->ucrd_data, sc->sc_repdesc, size);
 592                 break;
 593
 594         case USB_SET_IMMED:
 595                 if (*(int *)addr) {
 596                         /* XXX should read into ibuf, but does it matter? */
 597                         err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
 598                                   sc->sc_iid, sc->sc_ibuf, sc->sc_isize);
 599                         if (err)
 600                                 return (EOPNOTSUPP);
 601
 602                         sc->sc_state |=  UHID_IMMED;
 603                 } else
 604                         sc->sc_state &= ~UHID_IMMED;
 605                 break;
 606
 607         case USB_GET_REPORT:
 608                 re = (struct usb_ctl_report *)addr;
 609                 switch (re->ucr_report) {
 610                 case UHID_INPUT_REPORT:
 611                         size = sc->sc_isize;
 612                         id = sc->sc_iid;
 613                         break;
 614                 case UHID_OUTPUT_REPORT:
 615                         size = sc->sc_osize;
 616                         id = sc->sc_oid;
 617                         break;
 618                 case UHID_FEATURE_REPORT:
 619                         size = sc->sc_fsize;
 620                         id = sc->sc_fid;
 621                         break;
 622                 default:
 623                         return (EINVAL);
 624                 }
 625                 err = usbd_get_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 626                           size);
 627                 if (err)
 628                         return (EIO);
 629                 break;
 630
 631         case USB_SET_REPORT:
 632                 re = (struct usb_ctl_report *)addr;
 633                 switch (re->ucr_report) {
 634                 case UHID_INPUT_REPORT:
 635                         size = sc->sc_isize;
 636                         id = sc->sc_iid;
 637                         break;
 638                 case UHID_OUTPUT_REPORT:
 639                         size = sc->sc_osize;
 640                         id = sc->sc_oid;
 641                         break;
 642                 case UHID_FEATURE_REPORT:
 643                         size = sc->sc_fsize;
 644                         id = sc->sc_fid;
 645                         break;
 646                 default:
 647                         return (EINVAL);
 648                 }
 649                 err = usbd_set_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
 650                           size);
 651                 if (err)
 652                         return (EIO);
 653                 break;
 654
 655         case USB_GET_REPORT_ID:
 656                 *(int *)addr = 0;       /* XXX: we only support reportid 0? */
 657                 break;
 658
 659         default:
 660                 return (EINVAL);
 661         }
 662         return (0);
 663 }
 664
 665 int
 666 uhidioctl(struct dev_ioctl_args *ap)
 667 {
 668         cdev_t dev = ap->a_head.a_dev;
 669         struct uhid_softc *sc;
 670         int error;
 671
 672         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 673
 674         sc->sc_refcnt++;
 675         error = uhid_do_ioctl(sc, ap->a_cmd, ap->a_data, ap->a_fflag);
 676         if (--sc->sc_refcnt < 0)
 677                 usb_detach_wakeup(sc->sc_dev);
 678         return (error);
 679 }
 680
 681 int
 682 uhidpoll(struct dev_poll_args *ap)
 683 {
 684         cdev_t dev = ap->a_head.a_dev;
 685         struct uhid_softc *sc;
 686         int revents = 0;
 687
 688         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
 689
 690         if (sc->sc_dying)
 691                 return (EIO);
 692
 693         crit_enter();
 694         if (ap->a_events & (POLLOUT | POLLWRNORM))
 695                 revents |= ap->a_events & (POLLOUT | POLLWRNORM);
 696         if (ap->a_events & (POLLIN | POLLRDNORM)) {
 697                 if (sc->sc_q.c_cc > 0)
 698                         revents |= ap->a_events & (POLLIN | POLLRDNORM);
 699                 else
 700                         selrecord(curthread, &sc->sc_rsel);
 701         }
 702         crit_exit();
 703         ap->a_events = revents;
 704         return (0);
 705 }
 706
 707 DRIVER_MODULE(uhid, uhub, uhid_driver, uhid_devclass, usbd_driver_load, 0);
 708