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 $
7 /* Also already merged from NetBSD:
8 * $NetBSD: uhid.c,v 1.54 2002/09/23 05:51:21 simonb Exp $
12 * Copyright (c) 1998 The NetBSD Foundation, Inc.
13 * All rights reserved.
15 * This code is derived from software contributed to The NetBSD Foundation
16 * by Lennart Augustsson (lennart@augustsson.net) at
17 * Carlstedt Research & Technology.
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
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.
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.
49 * HID spec: http://www.usb.org/developers/data/usbhid10.pdf
52 #include <sys/param.h>
53 #include <sys/systm.h>
54 #include <sys/kernel.h>
56 #include <sys/malloc.h>
57 #include <sys/signalvar.h>
58 #include <sys/filio.h>
59 #include <sys/module.h>
63 #include <sys/select.h>
65 #include <sys/vnode.h>
67 #include <sys/sysctl.h>
68 #include <sys/thread2.h>
70 #include <bus/usb/usb.h>
71 #include <bus/usb/usbhid.h>
73 #include <bus/usb/usbdi.h>
74 #include <bus/usb/usbdi_util.h>
75 #include <bus/usb/hid.h>
77 /* Report descriptor for broken Wacom Graphire */
78 #include <bus/usb/ugraphire_rdesc.h>
81 #define DPRINTF(x) if (uhiddebug) kprintf x
82 #define DPRINTFN(n,x) if (uhiddebug>(n)) kprintf x
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");
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 */
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 */
125 #define UHIDUNIT(dev) (minor(dev))
126 #define UHID_CHUNK 128 /* chunk size for read */
127 #define UHID_BSIZE 1020 /* buffer size */
136 #define UHID_CDEV_MAJOR 122
138 static struct dev_ops uhid_ops = {
139 { "uhid", UHID_CDEV_MAJOR, 0 },
141 .d_close = uhidclose,
143 .d_write = uhidwrite,
144 .d_ioctl = uhidioctl,
148 static void uhid_intr(usbd_xfer_handle, usbd_private_handle,
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);
155 static device_probe_t uhid_match;
156 static device_attach_t uhid_attach;
157 static device_detach_t uhid_detach;
159 static devclass_t uhid_devclass;
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),
168 static driver_t uhid_driver = {
171 sizeof(struct uhid_softc)
174 MODULE_DEPEND(uhid, usb, 1, 1, 1);
177 uhid_match(device_t self)
179 struct usb_attach_arg *uaa = device_get_ivars(self);
180 usb_interface_descriptor_t *id;
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);
188 return (uaa->matchlvl);
189 return (UMATCH_IFACECLASS_GENERIC);
193 uhid_attach(device_t self)
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;
203 sc->sc_udev = uaa->device;
204 sc->sc_iface = iface;
207 ed = usbd_interface2endpoint_descriptor(iface, 0);
209 kprintf("%s: could not read endpoint descriptor\n",
210 device_get_nameunit(sc->sc_dev));
215 DPRINTFN(10,("uhid_attach: bLength=%d bDescriptorType=%d "
216 "bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d"
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));
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));
231 sc->sc_ep_addr = ed->bEndpointAddress;
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);
242 err = usbd_read_report_desc(uaa->iface, &desc, &size,M_USBDEV);
246 kprintf("%s: no report descriptor\n", device_get_nameunit(sc->sc_dev));
251 (void)usbd_set_idle(iface, 0, 0);
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);
257 sc->sc_repdesc = desc;
258 sc->sc_repdesc_size = size;
260 make_dev(&uhid_ops, device_get_unit(self),
261 UID_ROOT, GID_OPERATOR,
262 0644, "uhid%d", device_get_unit(self));
268 uhid_detach(device_t self)
270 struct uhid_softc *sc = device_get_softc(self);
272 DPRINTF(("uhid_detach: sc=%p\n", sc));
275 if (sc->sc_intrpipe != NULL)
276 usbd_abort_pipe(sc->sc_intrpipe);
278 if (sc->sc_state & UHID_OPEN) {
280 if (--sc->sc_refcnt >= 0) {
283 /* Wait for processes to go away. */
284 usb_detach_wait(sc->sc_dev);
289 dev_ops_remove_minor(&uhid_ops, device_get_unit(self));
292 kfree(sc->sc_repdesc, M_USBDEV);
298 uhid_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
300 struct uhid_softc *sc = addr;
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]));
315 if (status == USBD_CANCELLED)
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;
325 (void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q);
327 if (sc->sc_state & UHID_ASLP) {
328 sc->sc_state &= ~UHID_ASLP;
329 DPRINTFN(5, ("uhid_intr: waking %p\n", &sc->sc_q));
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);
340 uhidopen(struct dev_open_args *ap)
342 cdev_t dev = ap->a_head.a_dev;
343 struct uhid_softc *sc;
346 sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
350 DPRINTF(("uhidopen: sc=%p\n", sc));
355 if (sc->sc_state & UHID_OPEN)
357 sc->sc_state |= UHID_OPEN;
359 if ((clist_alloc_cblocks(&sc->sc_q, UHID_BSIZE,
360 UHID_BSIZE), 0) == -1) {
361 sc->sc_state &= ~UHID_OPEN;
365 sc->sc_ibuf = kmalloc(sc->sc_isize, M_USBDEV, M_WAITOK);
366 sc->sc_obuf = kmalloc(sc->sc_osize, M_USBDEV, M_WAITOK);
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);
373 DPRINTF(("uhidopen: usbd_open_pipe_intr failed, "
375 kfree(sc->sc_ibuf, M_USBDEV);
376 kfree(sc->sc_obuf, M_USBDEV);
377 sc->sc_ibuf = sc->sc_obuf = NULL;
379 sc->sc_state &= ~UHID_OPEN;
383 sc->sc_state &= ~UHID_IMMED;
391 uhidclose(struct dev_close_args *ap)
393 cdev_t dev = ap->a_head.a_dev;
394 struct uhid_softc *sc;
396 sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
398 DPRINTF(("uhidclose: sc=%p\n", sc));
400 /* Disable interrupts. */
401 usbd_abort_pipe(sc->sc_intrpipe);
402 usbd_close_pipe(sc->sc_intrpipe);
405 ndflush(&sc->sc_q, sc->sc_q.c_cc);
406 clist_free_cblocks(&sc->sc_q);
408 kfree(sc->sc_ibuf, M_USBDEV);
409 kfree(sc->sc_obuf, M_USBDEV);
410 sc->sc_ibuf = sc->sc_obuf = NULL;
412 sc->sc_state &= ~UHID_OPEN;
420 uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag)
424 u_char buffer[UHID_CHUNK];
427 DPRINTFN(1, ("uhidread\n"));
428 if (sc->sc_state & UHID_IMMED) {
429 DPRINTFN(1, ("uhidread immed\n"));
431 err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
432 sc->sc_iid, buffer, sc->sc_isize);
435 return (uiomove(buffer, sc->sc_isize, uio));
439 while (sc->sc_q.c_cc == 0) {
440 if (flag & IO_NDELAY) {
442 return (EWOULDBLOCK);
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));
451 sc->sc_state &= ~UHID_ASLP;
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);
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);
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));
472 /* Copy the data to the user process. */
473 if ((error = uiomove(buffer, length, uio)) != 0)
481 uhidread(struct dev_read_args *ap)
483 cdev_t dev = ap->a_head.a_dev;
484 struct uhid_softc *sc;
487 sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
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);
497 uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag)
503 DPRINTFN(1, ("uhidwrite\n"));
509 if (uio->uio_resid != size)
511 error = uiomove(sc->sc_obuf, size, uio);
514 err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
515 sc->sc_obuf[0], sc->sc_obuf+1, size-1);
517 err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
518 0, sc->sc_obuf, size);
527 uhidwrite(struct dev_write_args *ap)
529 cdev_t dev = ap->a_head.a_dev;
530 struct uhid_softc *sc;
533 sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
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);
543 uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, caddr_t addr, int flag)
545 struct usb_ctl_report_desc *rd;
546 struct usb_ctl_report *re;
550 DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd));
558 if (sc->sc_async != NULL)
560 sc->sc_async = curproc;
561 DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n", sc->sc_async));
566 /* XXX this is not the most general solution. */
568 if (sc->sc_async == NULL)
570 if (*(int *)addr != sc->sc_async->p_pgid)
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);
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);
589 sc->sc_state |= UHID_IMMED;
591 sc->sc_state &= ~UHID_IMMED;
595 re = (struct usb_ctl_report *)addr;
596 switch (re->ucr_report) {
597 case UHID_INPUT_REPORT:
601 case UHID_OUTPUT_REPORT:
605 case UHID_FEATURE_REPORT:
612 err = usbd_get_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
619 re = (struct usb_ctl_report *)addr;
620 switch (re->ucr_report) {
621 case UHID_INPUT_REPORT:
625 case UHID_OUTPUT_REPORT:
629 case UHID_FEATURE_REPORT:
636 err = usbd_set_report(sc->sc_iface, re->ucr_report, id, re->ucr_data,
642 case USB_GET_REPORT_ID:
643 *(int *)addr = 0; /* XXX: we only support reportid 0? */
653 uhidioctl(struct dev_ioctl_args *ap)
655 cdev_t dev = ap->a_head.a_dev;
656 struct uhid_softc *sc;
659 sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
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);
669 uhidpoll(struct dev_poll_args *ap)
671 cdev_t dev = ap->a_head.a_dev;
672 struct uhid_softc *sc;
675 sc = devclass_get_softc(uhid_devclass, UHIDUNIT(dev));
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);
687 selrecord(curthread, &sc->sc_rsel);
690 ap->a_events = revents;
694 DRIVER_MODULE(uhid, uhub, uhid_driver, uhid_devclass, usbd_driver_load, 0);