dev - Add kq support to usbmisc devices
[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/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 = 1;
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