xref: /freebsd/sys/dev/usb/input/ums.c (revision af23369a6deaaeb612ab266eb88b8bb8d560c322)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3  *
4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Lennart Augustsson (lennart@augustsson.net) at
9  * Carlstedt Research & Technology.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30  * POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35 
36 /*
37  * HID spec: http://www.usb.org/developers/devclass_docs/HID1_11.pdf
38  */
39 
40 #include "opt_evdev.h"
41 
42 #include <sys/stdint.h>
43 #include <sys/stddef.h>
44 #include <sys/param.h>
45 #include <sys/queue.h>
46 #include <sys/types.h>
47 #include <sys/systm.h>
48 #include <sys/kernel.h>
49 #include <sys/bus.h>
50 #include <sys/module.h>
51 #include <sys/lock.h>
52 #include <sys/mutex.h>
53 #include <sys/condvar.h>
54 #include <sys/sysctl.h>
55 #include <sys/sx.h>
56 #include <sys/unistd.h>
57 #include <sys/callout.h>
58 #include <sys/malloc.h>
59 #include <sys/priv.h>
60 #include <sys/conf.h>
61 #include <sys/fcntl.h>
62 #include <sys/sbuf.h>
63 
64 #include <dev/hid/hid.h>
65 
66 #include <dev/usb/usb.h>
67 #include <dev/usb/usbdi.h>
68 #include <dev/usb/usbdi_util.h>
69 #include <dev/usb/usbhid.h>
70 #include "usbdevs.h"
71 
72 #define	USB_DEBUG_VAR ums_debug
73 #include <dev/usb/usb_debug.h>
74 
75 #include <dev/usb/quirk/usb_quirk.h>
76 
77 #ifdef EVDEV_SUPPORT
78 #include <dev/evdev/input.h>
79 #include <dev/evdev/evdev.h>
80 #endif
81 
82 #include <sys/ioccom.h>
83 #include <sys/filio.h>
84 #include <sys/mouse.h>
85 
86 #ifdef USB_DEBUG
87 static int ums_debug = 0;
88 
89 static SYSCTL_NODE(_hw_usb, OID_AUTO, ums, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
90     "USB ums");
91 SYSCTL_INT(_hw_usb_ums, OID_AUTO, debug, CTLFLAG_RWTUN,
92     &ums_debug, 0, "Debug level");
93 #endif
94 
95 #define	MOUSE_FLAGS_MASK (HIO_CONST|HIO_RELATIVE)
96 #define	MOUSE_FLAGS (HIO_RELATIVE)
97 
98 #define	UMS_BUF_SIZE      8		/* bytes */
99 #define	UMS_IFQ_MAXLEN   50		/* units */
100 #define	UMS_BUTTON_MAX   31		/* exclusive, must be less than 32 */
101 #define	UMS_BUT(i) ((i) < 3 ? (((i) + 2) % 3) : (i))
102 #define	UMS_INFO_MAX	  2		/* maximum number of HID sets */
103 
104 enum {
105 	UMS_INTR_DT,
106 	UMS_N_TRANSFER,
107 };
108 
109 struct ums_info {
110 	struct hid_location sc_loc_w;
111 	struct hid_location sc_loc_x;
112 	struct hid_location sc_loc_y;
113 	struct hid_location sc_loc_z;
114 	struct hid_location sc_loc_t;
115 	struct hid_location sc_loc_btn[UMS_BUTTON_MAX];
116 
117 	uint32_t sc_flags;
118 #define	UMS_FLAG_X_AXIS     0x0001
119 #define	UMS_FLAG_Y_AXIS     0x0002
120 #define	UMS_FLAG_Z_AXIS     0x0004
121 #define	UMS_FLAG_T_AXIS     0x0008
122 #define	UMS_FLAG_SBU        0x0010	/* spurious button up events */
123 #define	UMS_FLAG_REVZ	    0x0020	/* Z-axis is reversed */
124 #define	UMS_FLAG_W_AXIS     0x0040
125 #define	UMS_FLAG_VBTN	    0x0080	/* Buttons in vendor usage page */
126 
127 	uint8_t	sc_iid_w;
128 	uint8_t	sc_iid_x;
129 	uint8_t	sc_iid_y;
130 	uint8_t	sc_iid_z;
131 	uint8_t	sc_iid_t;
132 	uint8_t	sc_iid_btn[UMS_BUTTON_MAX];
133 	uint8_t	sc_buttons;
134 };
135 
136 struct ums_softc {
137 	struct usb_fifo_sc sc_fifo;
138 	struct mtx sc_mtx;
139 	struct usb_callout sc_callout;
140 	struct ums_info sc_info[UMS_INFO_MAX];
141 
142 	mousehw_t sc_hw;
143 	mousemode_t sc_mode;
144 	mousestatus_t sc_status;
145 
146 	struct usb_xfer *sc_xfer[UMS_N_TRANSFER];
147 
148 	int sc_pollrate;
149 	int sc_fflags;
150 #ifdef EVDEV_SUPPORT
151 	int sc_evflags;
152 #define	UMS_EVDEV_OPENED	1
153 #endif
154 
155 	uint8_t	sc_buttons;
156 	uint8_t	sc_iid;
157 	uint8_t	sc_temp[64];
158 
159 #ifdef EVDEV_SUPPORT
160 	struct evdev_dev *sc_evdev;
161 #endif
162 };
163 
164 static void ums_put_queue_timeout(void *__sc);
165 
166 static usb_callback_t ums_intr_callback;
167 
168 static device_probe_t ums_probe;
169 static device_attach_t ums_attach;
170 static device_detach_t ums_detach;
171 
172 static usb_fifo_cmd_t ums_fifo_start_read;
173 static usb_fifo_cmd_t ums_fifo_stop_read;
174 static usb_fifo_open_t ums_fifo_open;
175 static usb_fifo_close_t ums_fifo_close;
176 static usb_fifo_ioctl_t ums_fifo_ioctl;
177 
178 #ifdef EVDEV_SUPPORT
179 static evdev_open_t ums_ev_open;
180 static evdev_close_t ums_ev_close;
181 static void ums_evdev_push(struct ums_softc *, int32_t, int32_t,
182     int32_t, int32_t, int32_t);
183 #endif
184 
185 static void	ums_start_rx(struct ums_softc *);
186 static void	ums_stop_rx(struct ums_softc *);
187 static void	ums_put_queue(struct ums_softc *, int32_t, int32_t,
188 		    int32_t, int32_t, int32_t);
189 static int	ums_sysctl_handler_parseinfo(SYSCTL_HANDLER_ARGS);
190 
191 static struct usb_fifo_methods ums_fifo_methods = {
192 	.f_open = &ums_fifo_open,
193 	.f_close = &ums_fifo_close,
194 	.f_ioctl = &ums_fifo_ioctl,
195 	.f_start_read = &ums_fifo_start_read,
196 	.f_stop_read = &ums_fifo_stop_read,
197 	.basename[0] = "ums",
198 };
199 
200 #ifdef EVDEV_SUPPORT
201 static const struct evdev_methods ums_evdev_methods = {
202 	.ev_open = &ums_ev_open,
203 	.ev_close = &ums_ev_close,
204 };
205 #endif
206 
207 static void
208 ums_put_queue_timeout(void *__sc)
209 {
210 	struct ums_softc *sc = __sc;
211 
212 	mtx_assert(&sc->sc_mtx, MA_OWNED);
213 
214 	ums_put_queue(sc, 0, 0, 0, 0, 0);
215 #ifdef EVDEV_SUPPORT
216 	ums_evdev_push(sc, 0, 0, 0, 0, 0);
217 #endif
218 }
219 
220 static void
221 ums_intr_callback(struct usb_xfer *xfer, usb_error_t error)
222 {
223 	struct ums_softc *sc = usbd_xfer_softc(xfer);
224 	struct ums_info *info = &sc->sc_info[0];
225 	struct usb_page_cache *pc;
226 	uint8_t *buf = sc->sc_temp;
227 	int32_t buttons = 0;
228 	int32_t buttons_found = 0;
229 #ifdef EVDEV_SUPPORT
230 	int32_t buttons_reported = 0;
231 #endif
232 	int32_t dw = 0;
233 	int32_t dx = 0;
234 	int32_t dy = 0;
235 	int32_t dz = 0;
236 	int32_t dt = 0;
237 	uint8_t i;
238 	uint8_t id;
239 	int len;
240 
241 	usbd_xfer_status(xfer, &len, NULL, NULL, NULL);
242 
243 	switch (USB_GET_STATE(xfer)) {
244 	case USB_ST_TRANSFERRED:
245 		DPRINTFN(6, "sc=%p actlen=%d\n", sc, len);
246 
247 		if (len > (int)sizeof(sc->sc_temp)) {
248 			DPRINTFN(6, "truncating large packet to %zu bytes\n",
249 			    sizeof(sc->sc_temp));
250 			len = sizeof(sc->sc_temp);
251 		}
252 		if (len == 0)
253 			goto tr_setup;
254 
255 		pc = usbd_xfer_get_frame(xfer, 0);
256 		usbd_copy_out(pc, 0, buf, len);
257 
258 		DPRINTFN(6, "data = %02x %02x %02x %02x "
259 		    "%02x %02x %02x %02x\n",
260 		    (len > 0) ? buf[0] : 0, (len > 1) ? buf[1] : 0,
261 		    (len > 2) ? buf[2] : 0, (len > 3) ? buf[3] : 0,
262 		    (len > 4) ? buf[4] : 0, (len > 5) ? buf[5] : 0,
263 		    (len > 6) ? buf[6] : 0, (len > 7) ? buf[7] : 0);
264 
265 		if (sc->sc_iid) {
266 			id = *buf;
267 
268 			len--;
269 			buf++;
270 
271 		} else {
272 			id = 0;
273 			if (sc->sc_info[0].sc_flags & UMS_FLAG_SBU) {
274 				if ((*buf == 0x14) || (*buf == 0x15)) {
275 					goto tr_setup;
276 				}
277 			}
278 		}
279 
280 	repeat:
281 		if ((info->sc_flags & UMS_FLAG_W_AXIS) &&
282 		    (id == info->sc_iid_w))
283 			dw += hid_get_data(buf, len, &info->sc_loc_w);
284 
285 		if ((info->sc_flags & UMS_FLAG_X_AXIS) &&
286 		    (id == info->sc_iid_x))
287 			dx += hid_get_data(buf, len, &info->sc_loc_x);
288 
289 		if ((info->sc_flags & UMS_FLAG_Y_AXIS) &&
290 		    (id == info->sc_iid_y))
291 			dy -= hid_get_data(buf, len, &info->sc_loc_y);
292 
293 		if ((info->sc_flags & UMS_FLAG_Z_AXIS) &&
294 		    (id == info->sc_iid_z)) {
295 			int32_t temp;
296 			temp = hid_get_data(buf, len, &info->sc_loc_z);
297 			if (info->sc_flags & UMS_FLAG_REVZ)
298 				temp = -temp;
299 			dz -= temp;
300 		}
301 
302 		if ((info->sc_flags & UMS_FLAG_T_AXIS) &&
303 		    (id == info->sc_iid_t)) {
304 			dt += hid_get_data(buf, len, &info->sc_loc_t);
305 			/* T-axis is translated into button presses */
306 			buttons_found |= (1UL << 5) | (1UL << 6);
307 		}
308 
309 		for (i = 0; i < info->sc_buttons; i++) {
310 			uint32_t mask;
311 			mask = 1UL << UMS_BUT(i);
312 			/* check for correct button ID */
313 			if (id != info->sc_iid_btn[i])
314 				continue;
315 			/* check for button pressed */
316 			if (hid_get_data(buf, len, &info->sc_loc_btn[i]))
317 				buttons |= mask;
318 			/* register button mask */
319 			buttons_found |= mask;
320 		}
321 
322 		if (++info != &sc->sc_info[UMS_INFO_MAX])
323 			goto repeat;
324 
325 #ifdef EVDEV_SUPPORT
326 		buttons_reported = buttons;
327 #endif
328 		/* keep old button value(s) for non-detected buttons */
329 		buttons |= sc->sc_status.button & ~buttons_found;
330 
331 		if (dx || dy || dz || dt || dw ||
332 		    (buttons != sc->sc_status.button)) {
333 			DPRINTFN(6, "x:%d y:%d z:%d t:%d w:%d buttons:0x%08x\n",
334 			    dx, dy, dz, dt, dw, buttons);
335 
336 			/* translate T-axis into button presses until further */
337 			if (dt > 0) {
338 				ums_put_queue(sc, 0, 0, 0, 0, buttons);
339 				buttons |= 1UL << 6;
340 			} else if (dt < 0) {
341 				ums_put_queue(sc, 0, 0, 0, 0, buttons);
342 				buttons |= 1UL << 5;
343 			}
344 
345 			sc->sc_status.button = buttons;
346 			sc->sc_status.dx += dx;
347 			sc->sc_status.dy += dy;
348 			sc->sc_status.dz += dz;
349 			/*
350 			 * sc->sc_status.dt += dt;
351 			 * no way to export this yet
352 			 */
353 
354 			/*
355 		         * The Qtronix keyboard has a built in PS/2
356 		         * port for a mouse.  The firmware once in a
357 		         * while posts a spurious button up
358 		         * event. This event we ignore by doing a
359 		         * timeout for 50 msecs.  If we receive
360 		         * dx=dy=dz=buttons=0 before we add the event
361 		         * to the queue.  In any other case we delete
362 		         * the timeout event.
363 		         */
364 			if ((sc->sc_info[0].sc_flags & UMS_FLAG_SBU) &&
365 			    (dx == 0) && (dy == 0) && (dz == 0) && (dt == 0) &&
366 			    (dw == 0) && (buttons == 0)) {
367 				usb_callout_reset(&sc->sc_callout, hz / 20,
368 				    &ums_put_queue_timeout, sc);
369 			} else {
370 				usb_callout_stop(&sc->sc_callout);
371 
372 				ums_put_queue(sc, dx, dy, dz, dt, buttons);
373 #ifdef EVDEV_SUPPORT
374 				ums_evdev_push(sc, dx, dy, dz, dt,
375 				    buttons_reported);
376 #endif
377 			}
378 		}
379 	case USB_ST_SETUP:
380 tr_setup:
381 		/* check if we can put more data into the FIFO */
382 		if (usb_fifo_put_bytes_max(sc->sc_fifo.fp[USB_FIFO_RX]) == 0) {
383 #ifdef EVDEV_SUPPORT
384 			if ((sc->sc_evflags & UMS_EVDEV_OPENED) == 0)
385 				break;
386 #else
387 			break;
388 #endif
389 		}
390 
391 		usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
392 		usbd_transfer_submit(xfer);
393 		break;
394 
395 	default:			/* Error */
396 		if (error != USB_ERR_CANCELLED) {
397 			/* try clear stall first */
398 			usbd_xfer_set_stall(xfer);
399 			goto tr_setup;
400 		}
401 		break;
402 	}
403 }
404 
405 static const struct usb_config ums_config[UMS_N_TRANSFER] = {
406 	[UMS_INTR_DT] = {
407 		.type = UE_INTERRUPT,
408 		.endpoint = UE_ADDR_ANY,
409 		.direction = UE_DIR_IN,
410 		.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
411 		.bufsize = 0,	/* use wMaxPacketSize */
412 		.callback = &ums_intr_callback,
413 	},
414 };
415 
416 /* A match on these entries will load ums */
417 static const STRUCT_USB_HOST_ID __used ums_devs[] = {
418 	{USB_IFACE_CLASS(UICLASS_HID),
419 	 USB_IFACE_SUBCLASS(UISUBCLASS_BOOT),
420 	 USB_IFACE_PROTOCOL(UIPROTO_MOUSE),},
421 };
422 
423 static int
424 ums_probe(device_t dev)
425 {
426 	struct usb_attach_arg *uaa = device_get_ivars(dev);
427 	void *d_ptr;
428 	int error;
429 	uint16_t d_len;
430 
431 	DPRINTFN(11, "\n");
432 
433 	if (uaa->usb_mode != USB_MODE_HOST)
434 		return (ENXIO);
435 
436 	if (uaa->info.bInterfaceClass != UICLASS_HID)
437 		return (ENXIO);
438 
439 	if (usb_test_quirk(uaa, UQ_UMS_IGNORE))
440 		return (ENXIO);
441 
442 	if ((uaa->info.bInterfaceSubClass == UISUBCLASS_BOOT) &&
443 	    (uaa->info.bInterfaceProtocol == UIPROTO_MOUSE))
444 		return (BUS_PROBE_DEFAULT);
445 
446 	error = usbd_req_get_hid_desc(uaa->device, NULL,
447 	    &d_ptr, &d_len, M_TEMP, uaa->info.bIfaceIndex);
448 
449 	if (error)
450 		return (ENXIO);
451 
452 	if (hid_is_mouse(d_ptr, d_len))
453 		error = BUS_PROBE_DEFAULT;
454 	else
455 		error = ENXIO;
456 
457 	free(d_ptr, M_TEMP);
458 	return (error);
459 }
460 
461 static void
462 ums_hid_parse(struct ums_softc *sc, device_t dev, const uint8_t *buf,
463     uint16_t len, uint8_t index)
464 {
465 	struct ums_info *info = &sc->sc_info[index];
466 	uint32_t flags;
467 	uint8_t i;
468 	uint8_t j;
469 
470 	if (hid_locate(buf, len, HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_X),
471 	    hid_input, index, &info->sc_loc_x, &flags, &info->sc_iid_x)) {
472 		if ((flags & MOUSE_FLAGS_MASK) == MOUSE_FLAGS) {
473 			info->sc_flags |= UMS_FLAG_X_AXIS;
474 		}
475 	}
476 	if (hid_locate(buf, len, HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_Y),
477 	    hid_input, index, &info->sc_loc_y, &flags, &info->sc_iid_y)) {
478 		if ((flags & MOUSE_FLAGS_MASK) == MOUSE_FLAGS) {
479 			info->sc_flags |= UMS_FLAG_Y_AXIS;
480 		}
481 	}
482 	/* Try the wheel first as the Z activator since it's tradition. */
483 	if (hid_locate(buf, len, HID_USAGE2(HUP_GENERIC_DESKTOP,
484 	    HUG_WHEEL), hid_input, index, &info->sc_loc_z, &flags,
485 	    &info->sc_iid_z) ||
486 	    hid_locate(buf, len, HID_USAGE2(HUP_GENERIC_DESKTOP,
487 	    HUG_TWHEEL), hid_input, index, &info->sc_loc_z, &flags,
488 	    &info->sc_iid_z)) {
489 		if ((flags & MOUSE_FLAGS_MASK) == MOUSE_FLAGS) {
490 			info->sc_flags |= UMS_FLAG_Z_AXIS;
491 		}
492 		/*
493 		 * We might have both a wheel and Z direction, if so put
494 		 * put the Z on the W coordinate.
495 		 */
496 		if (hid_locate(buf, len, HID_USAGE2(HUP_GENERIC_DESKTOP,
497 		    HUG_Z), hid_input, index, &info->sc_loc_w, &flags,
498 		    &info->sc_iid_w)) {
499 			if ((flags & MOUSE_FLAGS_MASK) == MOUSE_FLAGS) {
500 				info->sc_flags |= UMS_FLAG_W_AXIS;
501 			}
502 		}
503 	} else if (hid_locate(buf, len, HID_USAGE2(HUP_GENERIC_DESKTOP,
504 	    HUG_Z), hid_input, index, &info->sc_loc_z, &flags,
505 	    &info->sc_iid_z)) {
506 		if ((flags & MOUSE_FLAGS_MASK) == MOUSE_FLAGS) {
507 			info->sc_flags |= UMS_FLAG_Z_AXIS;
508 		}
509 	}
510 	/*
511 	 * The Microsoft Wireless Intellimouse 2.0 reports it's wheel
512 	 * using 0x0048, which is HUG_TWHEEL, and seems to expect you
513 	 * to know that the byte after the wheel is the tilt axis.
514 	 * There are no other HID axis descriptors other than X,Y and
515 	 * TWHEEL
516 	 */
517 	if (hid_locate(buf, len, HID_USAGE2(HUP_GENERIC_DESKTOP,
518 	    HUG_TWHEEL), hid_input, index, &info->sc_loc_t,
519 	    &flags, &info->sc_iid_t)) {
520 		info->sc_loc_t.pos += 8;
521 
522 		if ((flags & MOUSE_FLAGS_MASK) == MOUSE_FLAGS) {
523 			info->sc_flags |= UMS_FLAG_T_AXIS;
524 		}
525 	} else if (hid_locate(buf, len, HID_USAGE2(HUP_CONSUMER,
526 		HUC_AC_PAN), hid_input, index, &info->sc_loc_t,
527 		&flags, &info->sc_iid_t)) {
528 		if ((flags & MOUSE_FLAGS_MASK) == MOUSE_FLAGS)
529 			info->sc_flags |= UMS_FLAG_T_AXIS;
530 	}
531 	/* figure out the number of buttons */
532 
533 	for (i = 0; i < UMS_BUTTON_MAX; i++) {
534 		if (!hid_locate(buf, len, HID_USAGE2(HUP_BUTTON, (i + 1)),
535 		    hid_input, index, &info->sc_loc_btn[i], NULL,
536 		    &info->sc_iid_btn[i])) {
537 			break;
538 		}
539 	}
540 
541 	/* detect other buttons */
542 	if (info->sc_flags & UMS_FLAG_VBTN) {
543 		for (j = 0; (i < UMS_BUTTON_MAX) && (j < 2); i++, j++) {
544 			if (!hid_locate(buf, len, HID_USAGE2(HUP_MICROSOFT,
545 			    (j + 1)), hid_input, index, &info->sc_loc_btn[i],
546 			    NULL, &info->sc_iid_btn[i])) {
547 				break;
548 			}
549 		}
550 	}
551 
552 	info->sc_buttons = i;
553 
554 	if (i > sc->sc_buttons)
555 		sc->sc_buttons = i;
556 
557 	if (info->sc_flags == 0)
558 		return;
559 
560 	/* announce information about the mouse */
561 	device_printf(dev, "%d buttons and [%s%s%s%s%s] coordinates ID=%u\n",
562 	    (info->sc_buttons),
563 	    (info->sc_flags & UMS_FLAG_X_AXIS) ? "X" : "",
564 	    (info->sc_flags & UMS_FLAG_Y_AXIS) ? "Y" : "",
565 	    (info->sc_flags & UMS_FLAG_Z_AXIS) ? "Z" : "",
566 	    (info->sc_flags & UMS_FLAG_T_AXIS) ? "T" : "",
567 	    (info->sc_flags & UMS_FLAG_W_AXIS) ? "W" : "",
568 	    info->sc_iid_x);
569 }
570 
571 static int
572 ums_attach(device_t dev)
573 {
574 	struct usb_attach_arg *uaa = device_get_ivars(dev);
575 	struct ums_softc *sc = device_get_softc(dev);
576 	struct ums_info *info;
577 	void *d_ptr = NULL;
578 	int isize;
579 	int err;
580 	uint16_t d_len;
581 	uint8_t i;
582 #ifdef USB_DEBUG
583 	uint8_t j;
584 #endif
585 
586 	DPRINTFN(11, "sc=%p\n", sc);
587 
588 	device_set_usb_desc(dev);
589 
590 	mtx_init(&sc->sc_mtx, "ums lock", NULL, MTX_DEF | MTX_RECURSE);
591 
592 	usb_callout_init_mtx(&sc->sc_callout, &sc->sc_mtx, 0);
593 
594 	/*
595          * Force the report (non-boot) protocol.
596          *
597          * Mice without boot protocol support may choose not to implement
598          * Set_Protocol at all; Ignore any error.
599          */
600 	err = usbd_req_set_protocol(uaa->device, NULL,
601 	    uaa->info.bIfaceIndex, 1);
602 
603 	err = usbd_transfer_setup(uaa->device,
604 	    &uaa->info.bIfaceIndex, sc->sc_xfer, ums_config,
605 	    UMS_N_TRANSFER, sc, &sc->sc_mtx);
606 
607 	if (err) {
608 		DPRINTF("error=%s\n", usbd_errstr(err));
609 		goto detach;
610 	}
611 
612 	/* Get HID descriptor */
613 	err = usbd_req_get_hid_desc(uaa->device, NULL, &d_ptr,
614 	    &d_len, M_TEMP, uaa->info.bIfaceIndex);
615 
616 	if (err) {
617 		device_printf(dev, "error reading report description\n");
618 		goto detach;
619 	}
620 
621 	isize = hid_report_size_max(d_ptr, d_len, hid_input, &sc->sc_iid);
622 
623 	if (usb_test_quirk(uaa, UQ_MS_VENDOR_BTN))
624 		for (i = 0; i < UMS_INFO_MAX; i++)
625 			sc->sc_info[i].sc_flags |= UMS_FLAG_VBTN;
626 
627 	/*
628 	 * The Microsoft Wireless Notebook Optical Mouse seems to be in worse
629 	 * shape than the Wireless Intellimouse 2.0, as its X, Y, wheel, and
630 	 * all of its other button positions are all off. It also reports that
631 	 * it has two additional buttons and a tilt wheel.
632 	 */
633 	if (usb_test_quirk(uaa, UQ_MS_BAD_CLASS)) {
634 		sc->sc_iid = 0;
635 
636 		info = &sc->sc_info[0];
637 		info->sc_flags = (UMS_FLAG_X_AXIS |
638 		    UMS_FLAG_Y_AXIS |
639 		    UMS_FLAG_Z_AXIS |
640 		    UMS_FLAG_SBU);
641 		info->sc_buttons = 3;
642 		isize = 5;
643 		/* 1st byte of descriptor report contains garbage */
644 		info->sc_loc_x.pos = 16;
645 		info->sc_loc_x.size = 8;
646 		info->sc_loc_y.pos = 24;
647 		info->sc_loc_y.size = 8;
648 		info->sc_loc_z.pos = 32;
649 		info->sc_loc_z.size = 8;
650 		info->sc_loc_btn[0].pos = 8;
651 		info->sc_loc_btn[0].size = 1;
652 		info->sc_loc_btn[1].pos = 9;
653 		info->sc_loc_btn[1].size = 1;
654 		info->sc_loc_btn[2].pos = 10;
655 		info->sc_loc_btn[2].size = 1;
656 
657 		/* Announce device */
658 		device_printf(dev, "3 buttons and [XYZ] "
659 		    "coordinates ID=0\n");
660 
661 	} else {
662 		/* Search the HID descriptor and announce device */
663 		for (i = 0; i < UMS_INFO_MAX; i++) {
664 			ums_hid_parse(sc, dev, d_ptr, d_len, i);
665 		}
666 	}
667 
668 	if (usb_test_quirk(uaa, UQ_MS_REVZ)) {
669 		info = &sc->sc_info[0];
670 		/* Some wheels need the Z axis reversed. */
671 		info->sc_flags |= UMS_FLAG_REVZ;
672 	}
673 	if (isize > (int)usbd_xfer_max_framelen(sc->sc_xfer[UMS_INTR_DT])) {
674 		DPRINTF("WARNING: report size, %d bytes, is larger "
675 		    "than interrupt size, %d bytes!\n", isize,
676 		    usbd_xfer_max_framelen(sc->sc_xfer[UMS_INTR_DT]));
677 	}
678 	free(d_ptr, M_TEMP);
679 	d_ptr = NULL;
680 
681 #ifdef USB_DEBUG
682 	for (j = 0; j < UMS_INFO_MAX; j++) {
683 		info = &sc->sc_info[j];
684 
685 		DPRINTF("sc=%p, index=%d\n", sc, j);
686 		DPRINTF("X\t%d/%d id=%d\n", info->sc_loc_x.pos,
687 		    info->sc_loc_x.size, info->sc_iid_x);
688 		DPRINTF("Y\t%d/%d id=%d\n", info->sc_loc_y.pos,
689 		    info->sc_loc_y.size, info->sc_iid_y);
690 		DPRINTF("Z\t%d/%d id=%d\n", info->sc_loc_z.pos,
691 		    info->sc_loc_z.size, info->sc_iid_z);
692 		DPRINTF("T\t%d/%d id=%d\n", info->sc_loc_t.pos,
693 		    info->sc_loc_t.size, info->sc_iid_t);
694 		DPRINTF("W\t%d/%d id=%d\n", info->sc_loc_w.pos,
695 		    info->sc_loc_w.size, info->sc_iid_w);
696 
697 		for (i = 0; i < info->sc_buttons; i++) {
698 			DPRINTF("B%d\t%d/%d id=%d\n",
699 			    i + 1, info->sc_loc_btn[i].pos,
700 			    info->sc_loc_btn[i].size, info->sc_iid_btn[i]);
701 		}
702 	}
703 	DPRINTF("size=%d, id=%d\n", isize, sc->sc_iid);
704 #endif
705 
706 	err = usb_fifo_attach(uaa->device, sc, &sc->sc_mtx,
707 	    &ums_fifo_methods, &sc->sc_fifo,
708 	    device_get_unit(dev), -1, uaa->info.bIfaceIndex,
709   	    UID_ROOT, GID_OPERATOR, 0644);
710 	if (err)
711 		goto detach;
712 
713 #ifdef EVDEV_SUPPORT
714 	sc->sc_evdev = evdev_alloc();
715 	evdev_set_name(sc->sc_evdev, device_get_desc(dev));
716 	evdev_set_phys(sc->sc_evdev, device_get_nameunit(dev));
717 	evdev_set_id(sc->sc_evdev, BUS_USB, uaa->info.idVendor,
718 	    uaa->info.idProduct, 0);
719 	evdev_set_serial(sc->sc_evdev, usb_get_serial(uaa->device));
720 	evdev_set_methods(sc->sc_evdev, sc, &ums_evdev_methods);
721 	evdev_support_prop(sc->sc_evdev, INPUT_PROP_POINTER);
722 	evdev_support_event(sc->sc_evdev, EV_SYN);
723 	evdev_support_event(sc->sc_evdev, EV_REL);
724 	evdev_support_event(sc->sc_evdev, EV_KEY);
725 
726 	info = &sc->sc_info[0];
727 
728 	if (info->sc_flags & UMS_FLAG_X_AXIS)
729 		evdev_support_rel(sc->sc_evdev, REL_X);
730 
731 	if (info->sc_flags & UMS_FLAG_Y_AXIS)
732 		evdev_support_rel(sc->sc_evdev, REL_Y);
733 
734 	if (info->sc_flags & UMS_FLAG_Z_AXIS)
735 		evdev_support_rel(sc->sc_evdev, REL_WHEEL);
736 
737 	if (info->sc_flags & UMS_FLAG_T_AXIS)
738 		evdev_support_rel(sc->sc_evdev, REL_HWHEEL);
739 
740 	for (i = 0; i < info->sc_buttons; i++)
741 		evdev_support_key(sc->sc_evdev, BTN_MOUSE + i);
742 
743 	err = evdev_register_mtx(sc->sc_evdev, &sc->sc_mtx);
744 	if (err)
745 		goto detach;
746 #endif
747 
748 	SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
749 	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
750 	    OID_AUTO, "parseinfo",
751 	    CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE,
752 	    sc, 0, ums_sysctl_handler_parseinfo, "",
753 	    "Dump of parsed HID report descriptor");
754 
755 	return (0);
756 
757 detach:
758 	if (d_ptr) {
759 		free(d_ptr, M_TEMP);
760 	}
761 	ums_detach(dev);
762 	return (ENOMEM);
763 }
764 
765 static int
766 ums_detach(device_t self)
767 {
768 	struct ums_softc *sc = device_get_softc(self);
769 
770 	DPRINTF("sc=%p\n", sc);
771 
772 	usb_fifo_detach(&sc->sc_fifo);
773 
774 #ifdef EVDEV_SUPPORT
775 	evdev_free(sc->sc_evdev);
776 #endif
777 
778 	usbd_transfer_unsetup(sc->sc_xfer, UMS_N_TRANSFER);
779 
780 	usb_callout_drain(&sc->sc_callout);
781 
782 	mtx_destroy(&sc->sc_mtx);
783 
784 	return (0);
785 }
786 
787 static void
788 ums_reset(struct ums_softc *sc)
789 {
790 
791 	/* reset all USB mouse parameters */
792 
793 	if (sc->sc_buttons > MOUSE_MSC_MAXBUTTON)
794 		sc->sc_hw.buttons = MOUSE_MSC_MAXBUTTON;
795 	else
796 		sc->sc_hw.buttons = sc->sc_buttons;
797 
798 	sc->sc_hw.iftype = MOUSE_IF_USB;
799 	sc->sc_hw.type = MOUSE_MOUSE;
800 	sc->sc_hw.model = MOUSE_MODEL_GENERIC;
801 	sc->sc_hw.hwid = 0;
802 
803 	sc->sc_mode.protocol = MOUSE_PROTO_MSC;
804 	sc->sc_mode.rate = -1;
805 	sc->sc_mode.resolution = MOUSE_RES_UNKNOWN;
806 	sc->sc_mode.accelfactor = 0;
807 	sc->sc_mode.level = 0;
808 	sc->sc_mode.packetsize = MOUSE_MSC_PACKETSIZE;
809 	sc->sc_mode.syncmask[0] = MOUSE_MSC_SYNCMASK;
810 	sc->sc_mode.syncmask[1] = MOUSE_MSC_SYNC;
811 
812 	/* reset status */
813 
814 	sc->sc_status.flags = 0;
815 	sc->sc_status.button = 0;
816 	sc->sc_status.obutton = 0;
817 	sc->sc_status.dx = 0;
818 	sc->sc_status.dy = 0;
819 	sc->sc_status.dz = 0;
820 	/* sc->sc_status.dt = 0; */
821 }
822 
823 static void
824 ums_start_rx(struct ums_softc *sc)
825 {
826 	int rate;
827 
828 	/* Check if we should override the default polling interval */
829 	rate = sc->sc_pollrate;
830 	/* Range check rate */
831 	if (rate > 1000)
832 		rate = 1000;
833 	/* Check for set rate */
834 	if ((rate > 0) && (sc->sc_xfer[UMS_INTR_DT] != NULL)) {
835 		DPRINTF("Setting pollrate = %d\n", rate);
836 		/* Stop current transfer, if any */
837 		usbd_transfer_stop(sc->sc_xfer[UMS_INTR_DT]);
838 		/* Set new interval */
839 		usbd_xfer_set_interval(sc->sc_xfer[UMS_INTR_DT], 1000 / rate);
840 		/* Only set pollrate once */
841 		sc->sc_pollrate = 0;
842 	}
843 
844 	usbd_transfer_start(sc->sc_xfer[UMS_INTR_DT]);
845 }
846 
847 static void
848 ums_stop_rx(struct ums_softc *sc)
849 {
850 	usbd_transfer_stop(sc->sc_xfer[UMS_INTR_DT]);
851 	usb_callout_stop(&sc->sc_callout);
852 }
853 
854 static void
855 ums_fifo_start_read(struct usb_fifo *fifo)
856 {
857 	struct ums_softc *sc = usb_fifo_softc(fifo);
858 
859 	ums_start_rx(sc);
860 }
861 
862 static void
863 ums_fifo_stop_read(struct usb_fifo *fifo)
864 {
865 	struct ums_softc *sc = usb_fifo_softc(fifo);
866 
867 #ifdef EVDEV_SUPPORT
868 	if ((sc->sc_evflags & UMS_EVDEV_OPENED) == 0)
869 #endif
870 		ums_stop_rx(sc);
871 }
872 
873 #if ((MOUSE_SYS_PACKETSIZE != 8) || \
874      (MOUSE_MSC_PACKETSIZE != 5))
875 #error "Software assumptions are not met. Please update code."
876 #endif
877 
878 static void
879 ums_put_queue(struct ums_softc *sc, int32_t dx, int32_t dy,
880     int32_t dz, int32_t dt, int32_t buttons)
881 {
882 	uint8_t buf[8];
883 
884 #ifdef EVDEV_SUPPORT
885 	if (evdev_is_grabbed(sc->sc_evdev))
886 		return;
887 #endif
888 	if (1) {
889 		if (dx > 254)
890 			dx = 254;
891 		if (dx < -256)
892 			dx = -256;
893 		if (dy > 254)
894 			dy = 254;
895 		if (dy < -256)
896 			dy = -256;
897 		if (dz > 126)
898 			dz = 126;
899 		if (dz < -128)
900 			dz = -128;
901 		if (dt > 126)
902 			dt = 126;
903 		if (dt < -128)
904 			dt = -128;
905 
906 		buf[0] = sc->sc_mode.syncmask[1];
907 		buf[0] |= (~buttons) & MOUSE_MSC_BUTTONS;
908 		buf[1] = dx >> 1;
909 		buf[2] = dy >> 1;
910 		buf[3] = dx - (dx >> 1);
911 		buf[4] = dy - (dy >> 1);
912 
913 		if (sc->sc_mode.level == 1) {
914 			buf[5] = dz >> 1;
915 			buf[6] = dz - (dz >> 1);
916 			buf[7] = (((~buttons) >> 3) & MOUSE_SYS_EXTBUTTONS);
917 		}
918 		usb_fifo_put_data_linear(sc->sc_fifo.fp[USB_FIFO_RX], buf,
919 		    sc->sc_mode.packetsize, 1);
920 	} else {
921 		DPRINTF("Buffer full, discarded packet\n");
922 	}
923 }
924 
925 #ifdef EVDEV_SUPPORT
926 static void
927 ums_evdev_push(struct ums_softc *sc, int32_t dx, int32_t dy,
928     int32_t dz, int32_t dt, int32_t buttons)
929 {
930 	if (evdev_rcpt_mask & EVDEV_RCPT_HW_MOUSE) {
931 		/* Push evdev event */
932 		evdev_push_rel(sc->sc_evdev, REL_X, dx);
933 		evdev_push_rel(sc->sc_evdev, REL_Y, -dy);
934 		evdev_push_rel(sc->sc_evdev, REL_WHEEL, -dz);
935 		evdev_push_rel(sc->sc_evdev, REL_HWHEEL, dt);
936 		evdev_push_mouse_btn(sc->sc_evdev,
937 		    (buttons & ~MOUSE_STDBUTTONS) |
938 		    (buttons & (1 << 2) ? MOUSE_BUTTON1DOWN : 0) |
939 		    (buttons & (1 << 1) ? MOUSE_BUTTON2DOWN : 0) |
940 		    (buttons & (1 << 0) ? MOUSE_BUTTON3DOWN : 0));
941 		evdev_sync(sc->sc_evdev);
942 	}
943 }
944 #endif
945 
946 static void
947 ums_reset_buf(struct ums_softc *sc)
948 {
949 	/* reset read queue, must be called locked */
950 	usb_fifo_reset(sc->sc_fifo.fp[USB_FIFO_RX]);
951 }
952 
953 #ifdef EVDEV_SUPPORT
954 static int
955 ums_ev_open(struct evdev_dev *evdev)
956 {
957 	struct ums_softc *sc = evdev_get_softc(evdev);
958 
959 	mtx_assert(&sc->sc_mtx, MA_OWNED);
960 
961 	sc->sc_evflags |= UMS_EVDEV_OPENED;
962 
963 	if (sc->sc_fflags == 0) {
964 		ums_reset(sc);
965 	}
966 	ums_start_rx(sc);
967 
968 	return (0);
969 }
970 
971 static int
972 ums_ev_close(struct evdev_dev *evdev)
973 {
974 	struct ums_softc *sc = evdev_get_softc(evdev);
975 
976 	mtx_assert(&sc->sc_mtx, MA_OWNED);
977 
978 	sc->sc_evflags &= ~UMS_EVDEV_OPENED;
979 
980 	if (sc->sc_fflags == 0)
981 		ums_stop_rx(sc);
982 
983 	return (0);
984 }
985 #endif
986 
987 static int
988 ums_fifo_open(struct usb_fifo *fifo, int fflags)
989 {
990 	struct ums_softc *sc = usb_fifo_softc(fifo);
991 
992 	DPRINTFN(2, "\n");
993 
994 	/* check for duplicate open, should not happen */
995 	if (sc->sc_fflags & fflags)
996 		return (EBUSY);
997 
998 	/* check for first open */
999 #ifdef EVDEV_SUPPORT
1000 	if (sc->sc_fflags == 0 && (sc->sc_evflags & UMS_EVDEV_OPENED) == 0)
1001 		ums_reset(sc);
1002 #else
1003 	if (sc->sc_fflags == 0)
1004 		ums_reset(sc);
1005 #endif
1006 
1007 	if (fflags & FREAD) {
1008 		/* allocate RX buffer */
1009 		if (usb_fifo_alloc_buffer(fifo,
1010 		    UMS_BUF_SIZE, UMS_IFQ_MAXLEN)) {
1011 			return (ENOMEM);
1012 		}
1013 	}
1014 
1015 	sc->sc_fflags |= fflags & (FREAD | FWRITE);
1016 	return (0);
1017 }
1018 
1019 static void
1020 ums_fifo_close(struct usb_fifo *fifo, int fflags)
1021 {
1022 	struct ums_softc *sc = usb_fifo_softc(fifo);
1023 
1024 	DPRINTFN(2, "\n");
1025 
1026 	if (fflags & FREAD)
1027 		usb_fifo_free_buffer(fifo);
1028 
1029 	sc->sc_fflags &= ~(fflags & (FREAD | FWRITE));
1030 }
1031 
1032 static int
1033 ums_fifo_ioctl(struct usb_fifo *fifo, u_long cmd, void *addr, int fflags)
1034 {
1035 	struct ums_softc *sc = usb_fifo_softc(fifo);
1036 	mousemode_t mode;
1037 	int error = 0;
1038 
1039 	DPRINTFN(2, "\n");
1040 
1041 	mtx_lock(&sc->sc_mtx);
1042 
1043 	switch (cmd) {
1044 	case MOUSE_GETHWINFO:
1045 		*(mousehw_t *)addr = sc->sc_hw;
1046 		break;
1047 
1048 	case MOUSE_GETMODE:
1049 		*(mousemode_t *)addr = sc->sc_mode;
1050 		break;
1051 
1052 	case MOUSE_SETMODE:
1053 		mode = *(mousemode_t *)addr;
1054 
1055 		if (mode.level == -1) {
1056 			/* don't change the current setting */
1057 		} else if ((mode.level < 0) || (mode.level > 1)) {
1058 			error = EINVAL;
1059 			break;
1060 		} else {
1061 			sc->sc_mode.level = mode.level;
1062 		}
1063 
1064 		/* store polling rate */
1065 		sc->sc_pollrate = mode.rate;
1066 
1067 		if (sc->sc_mode.level == 0) {
1068 			if (sc->sc_buttons > MOUSE_MSC_MAXBUTTON)
1069 				sc->sc_hw.buttons = MOUSE_MSC_MAXBUTTON;
1070 			else
1071 				sc->sc_hw.buttons = sc->sc_buttons;
1072 			sc->sc_mode.protocol = MOUSE_PROTO_MSC;
1073 			sc->sc_mode.packetsize = MOUSE_MSC_PACKETSIZE;
1074 			sc->sc_mode.syncmask[0] = MOUSE_MSC_SYNCMASK;
1075 			sc->sc_mode.syncmask[1] = MOUSE_MSC_SYNC;
1076 		} else if (sc->sc_mode.level == 1) {
1077 			if (sc->sc_buttons > MOUSE_SYS_MAXBUTTON)
1078 				sc->sc_hw.buttons = MOUSE_SYS_MAXBUTTON;
1079 			else
1080 				sc->sc_hw.buttons = sc->sc_buttons;
1081 			sc->sc_mode.protocol = MOUSE_PROTO_SYSMOUSE;
1082 			sc->sc_mode.packetsize = MOUSE_SYS_PACKETSIZE;
1083 			sc->sc_mode.syncmask[0] = MOUSE_SYS_SYNCMASK;
1084 			sc->sc_mode.syncmask[1] = MOUSE_SYS_SYNC;
1085 		}
1086 		ums_reset_buf(sc);
1087 		break;
1088 
1089 	case MOUSE_GETLEVEL:
1090 		*(int *)addr = sc->sc_mode.level;
1091 		break;
1092 
1093 	case MOUSE_SETLEVEL:
1094 		if (*(int *)addr < 0 || *(int *)addr > 1) {
1095 			error = EINVAL;
1096 			break;
1097 		}
1098 		sc->sc_mode.level = *(int *)addr;
1099 
1100 		if (sc->sc_mode.level == 0) {
1101 			if (sc->sc_buttons > MOUSE_MSC_MAXBUTTON)
1102 				sc->sc_hw.buttons = MOUSE_MSC_MAXBUTTON;
1103 			else
1104 				sc->sc_hw.buttons = sc->sc_buttons;
1105 			sc->sc_mode.protocol = MOUSE_PROTO_MSC;
1106 			sc->sc_mode.packetsize = MOUSE_MSC_PACKETSIZE;
1107 			sc->sc_mode.syncmask[0] = MOUSE_MSC_SYNCMASK;
1108 			sc->sc_mode.syncmask[1] = MOUSE_MSC_SYNC;
1109 		} else if (sc->sc_mode.level == 1) {
1110 			if (sc->sc_buttons > MOUSE_SYS_MAXBUTTON)
1111 				sc->sc_hw.buttons = MOUSE_SYS_MAXBUTTON;
1112 			else
1113 				sc->sc_hw.buttons = sc->sc_buttons;
1114 			sc->sc_mode.protocol = MOUSE_PROTO_SYSMOUSE;
1115 			sc->sc_mode.packetsize = MOUSE_SYS_PACKETSIZE;
1116 			sc->sc_mode.syncmask[0] = MOUSE_SYS_SYNCMASK;
1117 			sc->sc_mode.syncmask[1] = MOUSE_SYS_SYNC;
1118 		}
1119 		ums_reset_buf(sc);
1120 		break;
1121 
1122 	case MOUSE_GETSTATUS:{
1123 			mousestatus_t *status = (mousestatus_t *)addr;
1124 
1125 			*status = sc->sc_status;
1126 			sc->sc_status.obutton = sc->sc_status.button;
1127 			sc->sc_status.button = 0;
1128 			sc->sc_status.dx = 0;
1129 			sc->sc_status.dy = 0;
1130 			sc->sc_status.dz = 0;
1131 			/* sc->sc_status.dt = 0; */
1132 
1133 			if (status->dx || status->dy || status->dz /* || status->dt */ ) {
1134 				status->flags |= MOUSE_POSCHANGED;
1135 			}
1136 			if (status->button != status->obutton) {
1137 				status->flags |= MOUSE_BUTTONSCHANGED;
1138 			}
1139 			break;
1140 		}
1141 	default:
1142 		error = ENOTTY;
1143 		break;
1144 	}
1145 
1146 	mtx_unlock(&sc->sc_mtx);
1147 	return (error);
1148 }
1149 
1150 static int
1151 ums_sysctl_handler_parseinfo(SYSCTL_HANDLER_ARGS)
1152 {
1153 	struct ums_softc *sc = arg1;
1154 	struct ums_info *info;
1155 	struct sbuf *sb;
1156 	int i, j, err, had_output;
1157 
1158 	sb = sbuf_new_auto();
1159 	for (i = 0, had_output = 0; i < UMS_INFO_MAX; i++) {
1160 		info = &sc->sc_info[i];
1161 
1162 		/* Don't emit empty info */
1163 		if ((info->sc_flags &
1164 		    (UMS_FLAG_X_AXIS | UMS_FLAG_Y_AXIS | UMS_FLAG_Z_AXIS |
1165 		     UMS_FLAG_T_AXIS | UMS_FLAG_W_AXIS)) == 0 &&
1166 		    info->sc_buttons == 0)
1167 			continue;
1168 
1169 		if (had_output)
1170 			sbuf_printf(sb, "\n");
1171 		had_output = 1;
1172 		sbuf_printf(sb, "i%d:", i + 1);
1173 		if (info->sc_flags & UMS_FLAG_X_AXIS)
1174 			sbuf_printf(sb, " X:r%d, p%d, s%d;",
1175 			    (int)info->sc_iid_x,
1176 			    (int)info->sc_loc_x.pos,
1177 			    (int)info->sc_loc_x.size);
1178 		if (info->sc_flags & UMS_FLAG_Y_AXIS)
1179 			sbuf_printf(sb, " Y:r%d, p%d, s%d;",
1180 			    (int)info->sc_iid_y,
1181 			    (int)info->sc_loc_y.pos,
1182 			    (int)info->sc_loc_y.size);
1183 		if (info->sc_flags & UMS_FLAG_Z_AXIS)
1184 			sbuf_printf(sb, " Z:r%d, p%d, s%d;",
1185 			    (int)info->sc_iid_z,
1186 			    (int)info->sc_loc_z.pos,
1187 			    (int)info->sc_loc_z.size);
1188 		if (info->sc_flags & UMS_FLAG_T_AXIS)
1189 			sbuf_printf(sb, " T:r%d, p%d, s%d;",
1190 			    (int)info->sc_iid_t,
1191 			    (int)info->sc_loc_t.pos,
1192 			    (int)info->sc_loc_t.size);
1193 		if (info->sc_flags & UMS_FLAG_W_AXIS)
1194 			sbuf_printf(sb, " W:r%d, p%d, s%d;",
1195 			    (int)info->sc_iid_w,
1196 			    (int)info->sc_loc_w.pos,
1197 			    (int)info->sc_loc_w.size);
1198 
1199 		for (j = 0; j < info->sc_buttons; j++) {
1200 			sbuf_printf(sb, " B%d:r%d, p%d, s%d;", j + 1,
1201 			    (int)info->sc_iid_btn[j],
1202 			    (int)info->sc_loc_btn[j].pos,
1203 			    (int)info->sc_loc_btn[j].size);
1204 		}
1205 	}
1206 	sbuf_finish(sb);
1207 	err = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
1208 	sbuf_delete(sb);
1209 
1210 	return (err);
1211 }
1212 
1213 static device_method_t ums_methods[] = {
1214 	DEVMETHOD(device_probe, ums_probe),
1215 	DEVMETHOD(device_attach, ums_attach),
1216 	DEVMETHOD(device_detach, ums_detach),
1217 
1218 	DEVMETHOD_END
1219 };
1220 
1221 static driver_t ums_driver = {
1222 	.name = "ums",
1223 	.methods = ums_methods,
1224 	.size = sizeof(struct ums_softc),
1225 };
1226 
1227 DRIVER_MODULE(ums, uhub, ums_driver, NULL, NULL);
1228 MODULE_DEPEND(ums, usb, 1, 1, 1);
1229 MODULE_DEPEND(ums, hid, 1, 1, 1);
1230 #ifdef EVDEV_SUPPORT
1231 MODULE_DEPEND(ums, evdev, 1, 1, 1);
1232 #endif
1233 MODULE_VERSION(ums, 1);
1234 USB_PNP_HOST_INFO(ums_devs);
1235