AMD64 - Refactor uio_resid and size_t assumptions.
[dragonfly.git] / 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/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_poll_t        uhidpoll;
135
136 #define         UHID_CDEV_MAJOR 122
137
138 static struct dev_ops uhid_ops = {
139         { "uhid", UHID_CDEV_MAJOR, 0 },
140         .d_open =       uhidopen,
141         .d_close =      uhidclose,
142         .d_read =       uhidread,
143         .d_write =      uhidwrite,
144         .d_ioctl =      uhidioctl,
145         .d_poll =       uhidpoll,
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         {0,0}
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         selwakeup(&sc->sc_rsel);
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 = 0;
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 = 0;
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 int
669 uhidpoll(struct dev_poll_args *ap)
670 {
671         cdev_t dev = ap->a_head.a_dev;
672         struct uhid_softc *sc;
673         int revents = 0;
674
675         sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
676
677         if (sc->sc_dying)
678                 return (EIO);
679
680         crit_enter();
681         if (ap->a_events & (POLLOUT | POLLWRNORM))
682                 revents |= ap->a_events & (POLLOUT | POLLWRNORM);
683         if (ap->a_events & (POLLIN | POLLRDNORM)) {
684                 if (sc->sc_q.c_cc > 0)
685                         revents |= ap->a_events & (POLLIN | POLLRDNORM);
686                 else
687                         selrecord(curthread, &sc->sc_rsel);
688         }
689         crit_exit();
690         ap->a_events = revents;
691         return (0);
692 }
693
694 DRIVER_MODULE(uhid, uhub, uhid_driver, uhid_devclass, usbd_driver_load, 0);
695