xref: /netbsd-src/sys/dev/usb/uhid.c (revision 220b5c059a84c51ea44107ea8951a57ffaecdc8c)
1 /*	$NetBSD: uhid.c,v 1.46 2001/11/13 06:24:55 lukem Exp $	*/
2 /*	$FreeBSD: src/sys/dev/usb/uhid.c,v 1.22 1999/11/17 22:33:43 n_hibma Exp $	*/
3 
4 /*
5  * Copyright (c) 1998 The NetBSD Foundation, Inc.
6  * All rights reserved.
7  *
8  * This code is derived from software contributed to The NetBSD Foundation
9  * by Lennart Augustsson (lennart@augustsson.net) at
10  * Carlstedt Research & Technology.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  *    notice, this list of conditions and the following disclaimer in the
19  *    documentation and/or other materials provided with the distribution.
20  * 3. All advertising materials mentioning features or use of this software
21  *    must display the following acknowledgement:
22  *        This product includes software developed by the NetBSD
23  *        Foundation, Inc. and its contributors.
24  * 4. Neither the name of The NetBSD Foundation nor the names of its
25  *    contributors may be used to endorse or promote products derived
26  *    from this software without specific prior written permission.
27  *
28  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
29  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
31  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
32  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38  * POSSIBILITY OF SUCH DAMAGE.
39  */
40 
41 /*
42  * HID spec: http://www.usb.org/developers/data/devclass/hid1_1.pdf
43  */
44 
45 #include <sys/cdefs.h>
46 __KERNEL_RCSID(0, "$NetBSD: uhid.c,v 1.46 2001/11/13 06:24:55 lukem Exp $");
47 
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/kernel.h>
51 #include <sys/malloc.h>
52 #include <sys/signalvar.h>
53 #if defined(__NetBSD__) || defined(__OpenBSD__)
54 #include <sys/device.h>
55 #include <sys/ioctl.h>
56 #elif defined(__FreeBSD__)
57 #include <sys/ioccom.h>
58 #include <sys/filio.h>
59 #include <sys/module.h>
60 #include <sys/bus.h>
61 #include <sys/ioccom.h>
62 #endif
63 #include <sys/conf.h>
64 #include <sys/tty.h>
65 #include <sys/file.h>
66 #include <sys/select.h>
67 #include <sys/proc.h>
68 #include <sys/vnode.h>
69 #include <sys/poll.h>
70 
71 #include <dev/usb/usb.h>
72 #include <dev/usb/usbhid.h>
73 
74 #include <dev/usb/usbdevs.h>
75 #include <dev/usb/usbdi.h>
76 #include <dev/usb/usbdi_util.h>
77 #include <dev/usb/hid.h>
78 #include <dev/usb/usb_quirks.h>
79 
80 /* Report descriptor for broken Wacom Graphire */
81 #include <dev/usb/ugraphire_rdesc.h>
82 
83 #ifdef UHID_DEBUG
84 #define DPRINTF(x)	if (uhiddebug) logprintf x
85 #define DPRINTFN(n,x)	if (uhiddebug>(n)) logprintf x
86 int	uhiddebug = 0;
87 #else
88 #define DPRINTF(x)
89 #define DPRINTFN(n,x)
90 #endif
91 
92 struct uhid_softc {
93 	USBBASEDEVICE 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 #if defined(__NetBSD__) || defined(__OpenBSD__)
130 cdev_decl(uhid);
131 #elif defined(__FreeBSD__)
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 cdevsw uhid_cdevsw = {
142 	/* open */	uhidopen,
143 	/* close */	uhidclose,
144 	/* read */	uhidread,
145 	/* write */	uhidwrite,
146 	/* ioctl */	uhidioctl,
147 	/* poll */	uhidpoll,
148 	/* mmap */	nommap,
149 	/* strategy */	nostrategy,
150 	/* name */	"uhid",
151 	/* maj */	UHID_CDEV_MAJOR,
152 	/* dump */	nodump,
153 	/* psize */	nopsize,
154 	/* flags */	0,
155 	/* bmaj */	-1
156 };
157 #endif
158 
159 Static void uhid_intr(usbd_xfer_handle, usbd_private_handle, usbd_status);
160 
161 Static int uhid_do_read(struct uhid_softc *, struct uio *uio, int);
162 Static int uhid_do_write(struct uhid_softc *, struct uio *uio, int);
163 Static int uhid_do_ioctl(struct uhid_softc*, u_long, caddr_t, int,struct proc*);
164 
165 USB_DECLARE_DRIVER(uhid);
166 
167 USB_MATCH(uhid)
168 {
169 	USB_MATCH_START(uhid, uaa);
170 	usb_interface_descriptor_t *id;
171 
172 	if (uaa->iface == NULL)
173 		return (UMATCH_NONE);
174 	id = usbd_get_interface_descriptor(uaa->iface);
175 	if (id == NULL || id->bInterfaceClass != UICLASS_HID)
176 		return (UMATCH_NONE);
177 	if (uaa->matchlvl)
178 		return (uaa->matchlvl);
179 	return (UMATCH_IFACECLASS_GENERIC);
180 }
181 
182 USB_ATTACH(uhid)
183 {
184 	USB_ATTACH_START(uhid, sc, uaa);
185 	usbd_interface_handle iface = uaa->iface;
186 	usb_interface_descriptor_t *id;
187 	usb_endpoint_descriptor_t *ed;
188 	int size;
189 	void *desc;
190 	usbd_status err;
191 	char devinfo[1024];
192 
193 	sc->sc_udev = uaa->device;
194 	sc->sc_iface = iface;
195 	id = usbd_get_interface_descriptor(iface);
196 	usbd_devinfo(uaa->device, 0, devinfo);
197 	USB_ATTACH_SETUP;
198 	printf("%s: %s, iclass %d/%d\n", USBDEVNAME(sc->sc_dev),
199 	       devinfo, id->bInterfaceClass, id->bInterfaceSubClass);
200 
201 	ed = usbd_interface2endpoint_descriptor(iface, 0);
202 	if (ed == NULL) {
203 		printf("%s: could not read endpoint descriptor\n",
204 		       USBDEVNAME(sc->sc_dev));
205 		sc->sc_dying = 1;
206 		USB_ATTACH_ERROR_RETURN;
207 	}
208 
209 	DPRINTFN(10,("uhid_attach: bLength=%d bDescriptorType=%d "
210 		     "bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d"
211 		     " bInterval=%d\n",
212 		     ed->bLength, ed->bDescriptorType,
213 		     ed->bEndpointAddress & UE_ADDR,
214 		     UE_GET_DIR(ed->bEndpointAddress)==UE_DIR_IN? "in" : "out",
215 		     ed->bmAttributes & UE_XFERTYPE,
216 		     UGETW(ed->wMaxPacketSize), ed->bInterval));
217 
218 	if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN ||
219 	    (ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
220 		printf("%s: unexpected endpoint\n", USBDEVNAME(sc->sc_dev));
221 		sc->sc_dying = 1;
222 		USB_ATTACH_ERROR_RETURN;
223 	}
224 
225 	sc->sc_ep_addr = ed->bEndpointAddress;
226 
227 	if (uaa->vendor == USB_VENDOR_WACOM &&
228 	    uaa->product == USB_PRODUCT_WACOM_GRAPHIRE /* &&
229 	    uaa->revision == 0x???? */) { /* XXX should use revision */
230 		/* The report descriptor for the Wacom Graphire is broken. */
231 		size = sizeof uhid_graphire_report_descr;
232 		desc = malloc(size, M_USBDEV, M_NOWAIT);
233 		if (desc == NULL)
234 			err = USBD_NOMEM;
235 		else {
236 			err = USBD_NORMAL_COMPLETION;
237 			memcpy(desc, uhid_graphire_report_descr, size);
238 		}
239 	} else {
240 		desc = NULL;
241 		err = usbd_read_report_desc(uaa->iface, &desc, &size,M_USBDEV);
242 	}
243 	if (err) {
244 		printf("%s: no report descriptor\n", USBDEVNAME(sc->sc_dev));
245 		sc->sc_dying = 1;
246 		USB_ATTACH_ERROR_RETURN;
247 	}
248 
249 	(void)usbd_set_idle(iface, 0, 0);
250 
251 	sc->sc_isize = hid_report_size(desc, size, hid_input,   &sc->sc_iid);
252 	sc->sc_osize = hid_report_size(desc, size, hid_output,  &sc->sc_oid);
253 	sc->sc_fsize = hid_report_size(desc, size, hid_feature, &sc->sc_fid);
254 
255 	sc->sc_repdesc = desc;
256 	sc->sc_repdesc_size = size;
257 
258 #ifdef __FreeBSD__
259 	{
260 		static int global_init_done = 0;
261 
262 		if (!global_init_done) {
263 			cdevsw_add(&uhid_cdevsw);
264 			global_init_done = 1;
265 		}
266 	}
267 #endif
268 
269 	usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev,
270 			   USBDEV(sc->sc_dev));
271 
272 	USB_ATTACH_SUCCESS_RETURN;
273 }
274 
275 #if defined(__NetBSD__) || defined(__OpenBSD__)
276 int
277 uhid_activate(device_ptr_t self, enum devact act)
278 {
279 	struct uhid_softc *sc = (struct uhid_softc *)self;
280 
281 	switch (act) {
282 	case DVACT_ACTIVATE:
283 		return (EOPNOTSUPP);
284 		break;
285 
286 	case DVACT_DEACTIVATE:
287 		sc->sc_dying = 1;
288 		break;
289 	}
290 	return (0);
291 }
292 #endif
293 
294 USB_DETACH(uhid)
295 {
296 	USB_DETACH_START(uhid, sc);
297 	int s;
298 #if defined(__NetBSD__) || defined(__OpenBSD__)
299 	int maj, mn;
300 
301 	DPRINTF(("uhid_detach: sc=%p flags=%d\n", sc, flags));
302 #else
303 	DPRINTF(("uhid_detach: sc=%p\n", sc));
304 #endif
305 
306 	sc->sc_dying = 1;
307 	if (sc->sc_intrpipe != NULL)
308 		usbd_abort_pipe(sc->sc_intrpipe);
309 
310 	if (sc->sc_state & UHID_OPEN) {
311 		s = splusb();
312 		if (--sc->sc_refcnt >= 0) {
313 			/* Wake everyone */
314 			wakeup(&sc->sc_q);
315 			/* Wait for processes to go away. */
316 			usb_detach_wait(USBDEV(sc->sc_dev));
317 		}
318 		splx(s);
319 	}
320 
321 #if defined(__NetBSD__) || defined(__OpenBSD__)
322 	/* locate the major number */
323 	for (maj = 0; maj < nchrdev; maj++)
324 		if (cdevsw[maj].d_open == uhidopen)
325 			break;
326 
327 	/* Nuke the vnodes for any open instances (calls close). */
328 	mn = self->dv_unit;
329 	vdevgone(maj, mn, mn, VCHR);
330 #elif defined(__FreeBSD__)
331 	/* XXX not implemented yet */
332 #endif
333 
334 	if (sc->sc_repdesc)
335 		free(sc->sc_repdesc, M_USBDEV);
336 
337 	usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev,
338 			   USBDEV(sc->sc_dev));
339 
340 	return (0);
341 }
342 
343 void
344 uhid_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
345 {
346 	struct uhid_softc *sc = addr;
347 
348 #ifdef UHID_DEBUG
349 	if (uhiddebug > 5) {
350 		u_int32_t cc, i;
351 
352 		usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
353 		DPRINTF(("uhid_intr: status=%d cc=%d\n", status, cc));
354 		DPRINTF(("uhid_intr: data ="));
355 		for (i = 0; i < cc; i++)
356 			DPRINTF((" %02x", sc->sc_ibuf[i]));
357 		DPRINTF(("\n"));
358 	}
359 #endif
360 
361 	if (status == USBD_CANCELLED)
362 		return;
363 
364 	if (status != USBD_NORMAL_COMPLETION) {
365 		DPRINTF(("uhid_intr: status=%d\n", status));
366 		sc->sc_state |= UHID_NEEDCLEAR;
367 		return;
368 	}
369 
370 	(void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q);
371 
372 	if (sc->sc_state & UHID_ASLP) {
373 		sc->sc_state &= ~UHID_ASLP;
374 		DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q));
375 		wakeup(&sc->sc_q);
376 	}
377 	selwakeup(&sc->sc_rsel);
378 	if (sc->sc_async != NULL) {
379 		DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n", sc->sc_async));
380 		psignal(sc->sc_async, SIGIO);
381 	}
382 }
383 
384 int
385 uhidopen(dev_t dev, int flag, int mode, struct proc *p)
386 {
387 	struct uhid_softc *sc;
388 	usbd_status err;
389 
390 	USB_GET_SC_OPEN(uhid, UHIDUNIT(dev), sc);
391 
392 	DPRINTF(("uhidopen: sc=%p\n", sc));
393 
394 	if (sc->sc_dying)
395 		return (ENXIO);
396 
397 	if (sc->sc_state & UHID_OPEN)
398 		return (EBUSY);
399 	sc->sc_state |= UHID_OPEN;
400 
401 	if (clalloc(&sc->sc_q, UHID_BSIZE, 0) == -1) {
402 		sc->sc_state &= ~UHID_OPEN;
403 		return (ENOMEM);
404 	}
405 
406 	sc->sc_ibuf = malloc(sc->sc_isize, M_USBDEV, M_WAITOK);
407 	sc->sc_obuf = malloc(sc->sc_osize, M_USBDEV, M_WAITOK);
408 
409 	/* Set up interrupt pipe. */
410 	err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr,
411 		  USBD_SHORT_XFER_OK, &sc->sc_intrpipe, sc, sc->sc_ibuf,
412 		  sc->sc_isize, uhid_intr, USBD_DEFAULT_INTERVAL);
413 	if (err) {
414 		DPRINTF(("uhidopen: usbd_open_pipe_intr failed, "
415 			 "error=%d\n",err));
416 		free(sc->sc_ibuf, M_USBDEV);
417 		free(sc->sc_obuf, M_USBDEV);
418 		sc->sc_state &= ~UHID_OPEN;
419 		return (EIO);
420 	}
421 
422 	sc->sc_state &= ~UHID_IMMED;
423 
424 	sc->sc_async = 0;
425 
426 	return (0);
427 }
428 
429 int
430 uhidclose(dev_t dev, int flag, int mode, struct proc *p)
431 {
432 	struct uhid_softc *sc;
433 
434 	USB_GET_SC(uhid, UHIDUNIT(dev), sc);
435 
436 	DPRINTF(("uhidclose: sc=%p\n", sc));
437 
438 	/* Disable interrupts. */
439 	usbd_abort_pipe(sc->sc_intrpipe);
440 	usbd_close_pipe(sc->sc_intrpipe);
441 	sc->sc_intrpipe = 0;
442 
443 	clfree(&sc->sc_q);
444 
445 	free(sc->sc_ibuf, M_USBDEV);
446 	free(sc->sc_obuf, M_USBDEV);
447 
448 	sc->sc_state &= ~UHID_OPEN;
449 
450 	sc->sc_async = 0;
451 
452 	return (0);
453 }
454 
455 int
456 uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag)
457 {
458 	int s;
459 	int error = 0;
460 	size_t length;
461 	u_char buffer[UHID_CHUNK];
462 	usbd_status err;
463 
464 	DPRINTFN(1, ("uhidread\n"));
465 	if (sc->sc_state & UHID_IMMED) {
466 		DPRINTFN(1, ("uhidread immed\n"));
467 
468 		err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
469 				    sc->sc_iid, buffer, sc->sc_isize);
470 		if (err)
471 			return (EIO);
472 		return (uiomove(buffer, sc->sc_isize, uio));
473 	}
474 
475 	s = splusb();
476 	while (sc->sc_q.c_cc == 0) {
477 		if (flag & IO_NDELAY) {
478 			splx(s);
479 			return (EWOULDBLOCK);
480 		}
481 		sc->sc_state |= UHID_ASLP;
482 		DPRINTFN(5, ("uhidread: sleep on %p\n", &sc->sc_q));
483 		error = tsleep(&sc->sc_q, PZERO | PCATCH, "uhidrea", 0);
484 		DPRINTFN(5, ("uhidread: woke, error=%d\n", error));
485 		if (sc->sc_dying)
486 			error = EIO;
487 		if (error) {
488 			sc->sc_state &= ~UHID_ASLP;
489 			break;
490 		}
491 		if (sc->sc_state & UHID_NEEDCLEAR) {
492 			DPRINTFN(-1,("uhidread: clearing stall\n"));
493 			sc->sc_state &= ~UHID_NEEDCLEAR;
494 			usbd_clear_endpoint_stall(sc->sc_intrpipe);
495 		}
496 	}
497 	splx(s);
498 
499 	/* Transfer as many chunks as possible. */
500 	while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) {
501 		length = min(sc->sc_q.c_cc, uio->uio_resid);
502 		if (length > sizeof(buffer))
503 			length = sizeof(buffer);
504 
505 		/* Remove a small chunk from the input queue. */
506 		(void) q_to_b(&sc->sc_q, buffer, length);
507 		DPRINTFN(5, ("uhidread: got %lu chars\n", (u_long)length));
508 
509 		/* Copy the data to the user process. */
510 		if ((error = uiomove(buffer, length, uio)) != 0)
511 			break;
512 	}
513 
514 	return (error);
515 }
516 
517 int
518 uhidread(dev_t dev, struct uio *uio, int flag)
519 {
520 	struct uhid_softc *sc;
521 	int error;
522 
523 	USB_GET_SC(uhid, UHIDUNIT(dev), sc);
524 
525 	sc->sc_refcnt++;
526 	error = uhid_do_read(sc, uio, flag);
527 	if (--sc->sc_refcnt < 0)
528 		usb_detach_wakeup(USBDEV(sc->sc_dev));
529 	return (error);
530 }
531 
532 int
533 uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag)
534 {
535 	int error;
536 	int size;
537 	usbd_status err;
538 
539 	DPRINTFN(1, ("uhidwrite\n"));
540 
541 	if (sc->sc_dying)
542 		return (EIO);
543 
544 	size = sc->sc_osize;
545 	error = 0;
546 	if (uio->uio_resid != size)
547 		return (EINVAL);
548 	error = uiomove(sc->sc_obuf, size, uio);
549 	if (!error) {
550 		if (sc->sc_oid)
551 			err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
552 				  sc->sc_obuf[0], sc->sc_obuf+1, size-1);
553 		else
554 			err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
555 				  0, sc->sc_obuf, size);
556 		if (err)
557 			error = EIO;
558 	}
559 
560 	return (error);
561 }
562 
563 int
564 uhidwrite(dev_t dev, struct uio *uio, int flag)
565 {
566 	struct uhid_softc *sc;
567 	int error;
568 
569 	USB_GET_SC(uhid, UHIDUNIT(dev), sc);
570 
571 	sc->sc_refcnt++;
572 	error = uhid_do_write(sc, uio, flag);
573 	if (--sc->sc_refcnt < 0)
574 		usb_detach_wakeup(USBDEV(sc->sc_dev));
575 	return (error);
576 }
577 
578 int
579 uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, caddr_t addr,
580 	      int flag, struct proc *p)
581 {
582 	struct usb_ctl_report_desc *rd;
583 	struct usb_ctl_report *re;
584 	int size, id;
585 	usbd_status err;
586 
587 	DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd));
588 
589 	if (sc->sc_dying)
590 		return (EIO);
591 
592 	switch (cmd) {
593 	case FIONBIO:
594 		/* All handled in the upper FS layer. */
595 		break;
596 
597 	case FIOASYNC:
598 		if (*(int *)addr) {
599 			if (sc->sc_async != NULL)
600 				return (EBUSY);
601 			sc->sc_async = p;
602 			DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n", p));
603 		} else
604 			sc->sc_async = NULL;
605 		break;
606 
607 	/* XXX this is not the most general solution. */
608 	case TIOCSPGRP:
609 		if (sc->sc_async == NULL)
610 			return (EINVAL);
611 		if (*(int *)addr != sc->sc_async->p_pgid)
612 			return (EPERM);
613 		break;
614 
615 	case USB_GET_REPORT_DESC:
616 		rd = (struct usb_ctl_report_desc *)addr;
617 		size = min(sc->sc_repdesc_size, sizeof rd->data);
618 		rd->size = size;
619 		memcpy(rd->data, sc->sc_repdesc, size);
620 		break;
621 
622 	case USB_SET_IMMED:
623 		if (*(int *)addr) {
624 			/* XXX should read into ibuf, but does it matter? */
625 			err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
626 				  sc->sc_iid, sc->sc_ibuf, sc->sc_isize);
627 			if (err)
628 				return (EOPNOTSUPP);
629 
630 			sc->sc_state |=  UHID_IMMED;
631 		} else
632 			sc->sc_state &= ~UHID_IMMED;
633 		break;
634 
635 	case USB_GET_REPORT:
636 		re = (struct usb_ctl_report *)addr;
637 		switch (re->report) {
638 		case UHID_INPUT_REPORT:
639 			size = sc->sc_isize;
640 			id = sc->sc_iid;
641 			break;
642 		case UHID_OUTPUT_REPORT:
643 			size = sc->sc_osize;
644 			id = sc->sc_oid;
645 			break;
646 		case UHID_FEATURE_REPORT:
647 			size = sc->sc_fsize;
648 			id = sc->sc_fid;
649 			break;
650 		default:
651 			return (EINVAL);
652 		}
653 		err = usbd_get_report(sc->sc_iface, re->report, id, re->data,
654 			  size);
655 		if (err)
656 			return (EIO);
657 		break;
658 
659 	case USB_SET_REPORT:
660 		re = (struct usb_ctl_report *)addr;
661 		switch (re->report) {
662 		case UHID_INPUT_REPORT:
663 			size = sc->sc_isize;
664 			id = sc->sc_iid;
665 			break;
666 		case UHID_OUTPUT_REPORT:
667 			size = sc->sc_osize;
668 			id = sc->sc_oid;
669 			break;
670 		case UHID_FEATURE_REPORT:
671 			size = sc->sc_fsize;
672 			id = sc->sc_fid;
673 			break;
674 		default:
675 			return (EINVAL);
676 		}
677 		err = usbd_set_report(sc->sc_iface, re->report, id, re->data,
678 			  size);
679 		if (err)
680 			return (EIO);
681 		break;
682 
683 	default:
684 		return (EINVAL);
685 	}
686 	return (0);
687 }
688 
689 int
690 uhidioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
691 {
692 	struct uhid_softc *sc;
693 	int error;
694 
695 	USB_GET_SC(uhid, UHIDUNIT(dev), sc);
696 
697 	sc->sc_refcnt++;
698 	error = uhid_do_ioctl(sc, cmd, addr, flag, p);
699 	if (--sc->sc_refcnt < 0)
700 		usb_detach_wakeup(USBDEV(sc->sc_dev));
701 	return (error);
702 }
703 
704 int
705 uhidpoll(dev_t dev, int events, struct proc *p)
706 {
707 	struct uhid_softc *sc;
708 	int revents = 0;
709 	int s;
710 
711 	USB_GET_SC(uhid, UHIDUNIT(dev), sc);
712 
713 	if (sc->sc_dying)
714 		return (EIO);
715 
716 	s = splusb();
717 	if (events & (POLLOUT | POLLWRNORM))
718 		revents |= events & (POLLOUT | POLLWRNORM);
719 	if (events & (POLLIN | POLLRDNORM)) {
720 		if (sc->sc_q.c_cc > 0)
721 			revents |= events & (POLLIN | POLLRDNORM);
722 		else
723 			selrecord(p, &sc->sc_rsel);
724 	}
725 
726 	splx(s);
727 	return (revents);
728 }
729 
730 #if defined(__FreeBSD__)
731 DRIVER_MODULE(uhid, uhub, uhid_driver, uhid_devclass, usbd_driver_load, 0);
732 #endif
733