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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Apple "Magic" Wireless Mouse driver
4 *
5 * Copyright (c) 2010 Michael Poole <[email protected]>
6 * Copyright (c) 2010 Chase Douglas <[email protected]>
7 */
8
9/*
10 */
11
12#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
14#include <linux/device.h>
15#include <linux/hid.h>
16#include <linux/input/mt.h>
17#include <linux/module.h>
18#include <linux/slab.h>
19#include <linux/workqueue.h>
20
21#include "hid-ids.h"
22
23static bool emulate_3button = true;
24module_param(emulate_3button, bool, 0644);
25MODULE_PARM_DESC(emulate_3button, "Emulate a middle button");
26
27static int middle_button_start = -350;
28static int middle_button_stop = +350;
29
30static bool emulate_scroll_wheel = true;
31module_param(emulate_scroll_wheel, bool, 0644);
32MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel");
33
34static unsigned int scroll_speed = 32;
35static int param_set_scroll_speed(const char *val,
36 const struct kernel_param *kp) {
37 unsigned long speed;
38 if (!val || kstrtoul(val, 0, &speed) || speed > 63)
39 return -EINVAL;
40 scroll_speed = speed;
41 return 0;
42}
43module_param_call(scroll_speed, param_set_scroll_speed, param_get_uint, &scroll_speed, 0644);
44MODULE_PARM_DESC(scroll_speed, "Scroll speed, value from 0 (slow) to 63 (fast)");
45
46static bool scroll_acceleration = false;
47module_param(scroll_acceleration, bool, 0644);
48MODULE_PARM_DESC(scroll_acceleration, "Accelerate sequential scroll events");
49
50static bool report_undeciphered;
51module_param(report_undeciphered, bool, 0644);
52MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event");
53
54#define TRACKPAD2_2021_BT_VERSION 0x110
55#define TRACKPAD_2024_BT_VERSION 0x314
56
57#define TRACKPAD_REPORT_ID 0x28
58#define TRACKPAD2_USB_REPORT_ID 0x02
59#define TRACKPAD2_BT_REPORT_ID 0x31
60#define MOUSE_REPORT_ID 0x29
61#define MOUSE2_REPORT_ID 0x12
62#define DOUBLE_REPORT_ID 0xf7
63#define USB_BATTERY_TIMEOUT_SEC 60
64
65/* These definitions are not precise, but they're close enough. (Bits
66 * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem
67 * to be some kind of bit mask -- 0x20 may be a near-field reading,
68 * and 0x40 is actual contact, and 0x10 may be a start/stop or change
69 * indication.)
70 */
71#define TOUCH_STATE_MASK 0xf0
72#define TOUCH_STATE_NONE 0x00
73#define TOUCH_STATE_START 0x30
74#define TOUCH_STATE_DRAG 0x40
75
76/* Number of high-resolution events for each low-resolution detent. */
77#define SCROLL_HR_STEPS 10
78#define SCROLL_HR_MULT (120 / SCROLL_HR_STEPS)
79#define SCROLL_HR_THRESHOLD 90 /* units */
80#define SCROLL_ACCEL_DEFAULT 7
81
82/* Touch surface information. Dimension is in hundredths of a mm, min and max
83 * are in units. */
84#define MOUSE_DIMENSION_X (float)9056
85#define MOUSE_MIN_X -1100
86#define MOUSE_MAX_X 1258
87#define MOUSE_RES_X ((MOUSE_MAX_X - MOUSE_MIN_X) / (MOUSE_DIMENSION_X / 100))
88#define MOUSE_DIMENSION_Y (float)5152
89#define MOUSE_MIN_Y -1589
90#define MOUSE_MAX_Y 2047
91#define MOUSE_RES_Y ((MOUSE_MAX_Y - MOUSE_MIN_Y) / (MOUSE_DIMENSION_Y / 100))
92
93#define TRACKPAD_DIMENSION_X (float)13000
94#define TRACKPAD_MIN_X -2909
95#define TRACKPAD_MAX_X 3167
96#define TRACKPAD_RES_X \
97 ((TRACKPAD_MAX_X - TRACKPAD_MIN_X) / (TRACKPAD_DIMENSION_X / 100))
98#define TRACKPAD_DIMENSION_Y (float)11000
99#define TRACKPAD_MIN_Y -2456
100#define TRACKPAD_MAX_Y 2565
101#define TRACKPAD_RES_Y \
102 ((TRACKPAD_MAX_Y - TRACKPAD_MIN_Y) / (TRACKPAD_DIMENSION_Y / 100))
103
104#define TRACKPAD2_DIMENSION_X (float)16000
105#define TRACKPAD2_MIN_X -3678
106#define TRACKPAD2_MAX_X 3934
107#define TRACKPAD2_RES_X \
108 ((TRACKPAD2_MAX_X - TRACKPAD2_MIN_X) / (TRACKPAD2_DIMENSION_X / 100))
109#define TRACKPAD2_DIMENSION_Y (float)11490
110#define TRACKPAD2_MIN_Y -2478
111#define TRACKPAD2_MAX_Y 2587
112#define TRACKPAD2_RES_Y \
113 ((TRACKPAD2_MAX_Y - TRACKPAD2_MIN_Y) / (TRACKPAD2_DIMENSION_Y / 100))
114
115/**
116 * struct magicmouse_sc - Tracks Magic Mouse-specific data.
117 * @input: Input device through which we report events.
118 * @quirks: Currently unused.
119 * @ntouches: Number of touches in most recent touch report.
120 * @scroll_accel: Number of consecutive scroll motions.
121 * @scroll_jiffies: Time of last scroll motion.
122 * @touches: Most recent data for a touch, indexed by tracking ID.
123 * @tracking_ids: Mapping of current touch input data to @touches.
124 * @hdev: Pointer to the underlying HID device.
125 * @work: Workqueue to handle initialization retry for quirky devices.
126 * @battery_timer: Timer for obtaining battery level information.
127 */
128struct magicmouse_sc {
129 struct input_dev *input;
130 unsigned long quirks;
131
132 int ntouches;
133 int scroll_accel;
134 unsigned long scroll_jiffies;
135
136 struct {
137 short x;
138 short y;
139 short scroll_x;
140 short scroll_y;
141 short scroll_x_hr;
142 short scroll_y_hr;
143 u8 size;
144 bool scroll_x_active;
145 bool scroll_y_active;
146 } touches[16];
147 int tracking_ids[16];
148
149 struct hid_device *hdev;
150 struct delayed_work work;
151 struct timer_list battery_timer;
152};
153
154static int magicmouse_firm_touch(struct magicmouse_sc *msc)
155{
156 int touch = -1;
157 int ii;
158
159 /* If there is only one "firm" touch, set touch to its
160 * tracking ID.
161 */
162 for (ii = 0; ii < msc->ntouches; ii++) {
163 int idx = msc->tracking_ids[ii];
164 if (msc->touches[idx].size < 8) {
165 /* Ignore this touch. */
166 } else if (touch >= 0) {
167 touch = -1;
168 break;
169 } else {
170 touch = idx;
171 }
172 }
173
174 return touch;
175}
176
177static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
178{
179 int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
180 test_bit(BTN_RIGHT, msc->input->key) << 1 |
181 test_bit(BTN_MIDDLE, msc->input->key) << 2;
182
183 if (emulate_3button) {
184 int id;
185
186 /* If some button was pressed before, keep it held
187 * down. Otherwise, if there's exactly one firm
188 * touch, use that to override the mouse's guess.
189 */
190 if (state == 0) {
191 /* The button was released. */
192 } else if (last_state != 0) {
193 state = last_state;
194 } else if ((id = magicmouse_firm_touch(msc)) >= 0) {
195 int x = msc->touches[id].x;
196 if (x < middle_button_start)
197 state = 1;
198 else if (x > middle_button_stop)
199 state = 2;
200 else
201 state = 4;
202 } /* else: we keep the mouse's guess */
203
204 input_report_key(msc->input, BTN_MIDDLE, state & 4);
205 }
206
207 input_report_key(msc->input, BTN_LEFT, state & 1);
208 input_report_key(msc->input, BTN_RIGHT, state & 2);
209
210 if (state != last_state)
211 msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
212}
213
214static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata)
215{
216 struct input_dev *input = msc->input;
217 int id, x, y, size, orientation, touch_major, touch_minor, state, down;
218 int pressure = 0;
219
220 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
221 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
222 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) {
223 id = (tdata[6] << 2 | tdata[5] >> 6) & 0xf;
224 x = (tdata[1] << 28 | tdata[0] << 20) >> 20;
225 y = -((tdata[2] << 24 | tdata[1] << 16) >> 20);
226 size = tdata[5] & 0x3f;
227 orientation = (tdata[6] >> 2) - 32;
228 touch_major = tdata[3];
229 touch_minor = tdata[4];
230 state = tdata[7] & TOUCH_STATE_MASK;
231 down = state != TOUCH_STATE_NONE;
232 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 ||
233 input->id.product ==
234 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) {
235 id = tdata[8] & 0xf;
236 x = (tdata[1] << 27 | tdata[0] << 19) >> 19;
237 y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19);
238 size = tdata[6];
239 orientation = (tdata[8] >> 5) - 4;
240 touch_major = tdata[4];
241 touch_minor = tdata[5];
242 pressure = tdata[7];
243 state = tdata[3] & 0xC0;
244 down = state == 0x80;
245 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
246 id = (tdata[7] << 2 | tdata[6] >> 6) & 0xf;
247 x = (tdata[1] << 27 | tdata[0] << 19) >> 19;
248 y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19);
249 size = tdata[6] & 0x3f;
250 orientation = (tdata[7] >> 2) - 32;
251 touch_major = tdata[4];
252 touch_minor = tdata[5];
253 state = tdata[8] & TOUCH_STATE_MASK;
254 down = state != TOUCH_STATE_NONE;
255 }
256
257 /* Store tracking ID and other fields. */
258 msc->tracking_ids[raw_id] = id;
259 msc->touches[id].x = x;
260 msc->touches[id].y = y;
261 msc->touches[id].size = size;
262
263 /* If requested, emulate a scroll wheel by detecting small
264 * vertical touch motions.
265 */
266 if (emulate_scroll_wheel &&
267 input->id.product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 &&
268 input->id.product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) {
269 unsigned long now = jiffies;
270 int step_x = msc->touches[id].scroll_x - x;
271 int step_y = msc->touches[id].scroll_y - y;
272 int step_hr =
273 max_t(int,
274 ((64 - (int)scroll_speed) * msc->scroll_accel) /
275 SCROLL_HR_STEPS,
276 1);
277 int step_x_hr = msc->touches[id].scroll_x_hr - x;
278 int step_y_hr = msc->touches[id].scroll_y_hr - y;
279
280 /* Calculate and apply the scroll motion. */
281 switch (state) {
282 case TOUCH_STATE_START:
283 msc->touches[id].scroll_x = x;
284 msc->touches[id].scroll_y = y;
285 msc->touches[id].scroll_x_hr = x;
286 msc->touches[id].scroll_y_hr = y;
287 msc->touches[id].scroll_x_active = false;
288 msc->touches[id].scroll_y_active = false;
289
290 /* Reset acceleration after half a second. */
291 if (scroll_acceleration && time_before(now,
292 msc->scroll_jiffies + HZ / 2))
293 msc->scroll_accel = max_t(int,
294 msc->scroll_accel - 1, 1);
295 else
296 msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
297
298 break;
299 case TOUCH_STATE_DRAG:
300 step_x /= (64 - (int)scroll_speed) * msc->scroll_accel;
301 if (step_x != 0) {
302 msc->touches[id].scroll_x -= step_x *
303 (64 - scroll_speed) * msc->scroll_accel;
304 msc->scroll_jiffies = now;
305 input_report_rel(input, REL_HWHEEL, -step_x);
306 }
307
308 step_y /= (64 - (int)scroll_speed) * msc->scroll_accel;
309 if (step_y != 0) {
310 msc->touches[id].scroll_y -= step_y *
311 (64 - scroll_speed) * msc->scroll_accel;
312 msc->scroll_jiffies = now;
313 input_report_rel(input, REL_WHEEL, step_y);
314 }
315
316 if (!msc->touches[id].scroll_x_active &&
317 abs(step_x_hr) > SCROLL_HR_THRESHOLD) {
318 msc->touches[id].scroll_x_active = true;
319 msc->touches[id].scroll_x_hr = x;
320 step_x_hr = 0;
321 }
322
323 step_x_hr /= step_hr;
324 if (step_x_hr != 0 &&
325 msc->touches[id].scroll_x_active) {
326 msc->touches[id].scroll_x_hr -= step_x_hr *
327 step_hr;
328 input_report_rel(input,
329 REL_HWHEEL_HI_RES,
330 -step_x_hr * SCROLL_HR_MULT);
331 }
332
333 if (!msc->touches[id].scroll_y_active &&
334 abs(step_y_hr) > SCROLL_HR_THRESHOLD) {
335 msc->touches[id].scroll_y_active = true;
336 msc->touches[id].scroll_y_hr = y;
337 step_y_hr = 0;
338 }
339
340 step_y_hr /= step_hr;
341 if (step_y_hr != 0 &&
342 msc->touches[id].scroll_y_active) {
343 msc->touches[id].scroll_y_hr -= step_y_hr *
344 step_hr;
345 input_report_rel(input,
346 REL_WHEEL_HI_RES,
347 step_y_hr * SCROLL_HR_MULT);
348 }
349 break;
350 }
351 }
352
353 if (down)
354 msc->ntouches++;
355
356 input_mt_slot(input, id);
357 input_mt_report_slot_state(input, MT_TOOL_FINGER, down);
358
359 /* Generate the input events for this touch. */
360 if (down) {
361 input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major << 2);
362 input_report_abs(input, ABS_MT_TOUCH_MINOR, touch_minor << 2);
363 input_report_abs(input, ABS_MT_ORIENTATION, -orientation);
364 input_report_abs(input, ABS_MT_POSITION_X, x);
365 input_report_abs(input, ABS_MT_POSITION_Y, y);
366
367 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 ||
368 input->id.product ==
369 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC)
370 input_report_abs(input, ABS_MT_PRESSURE, pressure);
371
372 if (report_undeciphered) {
373 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
374 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
375 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC)
376 input_event(input, EV_MSC, MSC_RAW, tdata[7]);
377 else if (input->id.product !=
378 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 &&
379 input->id.product !=
380 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC)
381 input_event(input, EV_MSC, MSC_RAW, tdata[8]);
382 }
383 }
384}
385
386static int __magicmouse_raw_event(struct hid_device *hdev,
387 struct hid_report *report, u8 *data, int size, bool nested)
388{
389 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
390 struct input_dev *input = msc->input;
391 int x = 0, y = 0, ii, clicks = 0, npoints;
392
393 /* Protect against zero sized recursive calls from DOUBLE_REPORT_ID */
394 if (size < 1)
395 return 0;
396
397 switch (data[0]) {
398 case TRACKPAD_REPORT_ID:
399 case TRACKPAD2_BT_REPORT_ID:
400 /* Expect four bytes of prefix, and N*9 bytes of touch data. */
401 if (size < 4 || ((size - 4) % 9) != 0)
402 return 0;
403 npoints = (size - 4) / 9;
404 if (npoints > 15) {
405 hid_warn(hdev, "invalid size value (%d) for TRACKPAD_REPORT_ID\n",
406 size);
407 return 0;
408 }
409 msc->ntouches = 0;
410 for (ii = 0; ii < npoints; ii++)
411 magicmouse_emit_touch(msc, ii, data + ii * 9 + 4);
412
413 clicks = data[1];
414
415 /* The following bits provide a device specific timestamp. They
416 * are unused here.
417 *
418 * ts = data[1] >> 6 | data[2] << 2 | data[3] << 10;
419 */
420 break;
421 case TRACKPAD2_USB_REPORT_ID:
422 /* Expect twelve bytes of prefix and N*9 bytes of touch data. */
423 if (size < 12 || ((size - 12) % 9) != 0)
424 return 0;
425 npoints = (size - 12) / 9;
426 if (npoints > 15) {
427 hid_warn(hdev, "invalid size value (%d) for TRACKPAD2_USB_REPORT_ID\n",
428 size);
429 return 0;
430 }
431 msc->ntouches = 0;
432 for (ii = 0; ii < npoints; ii++)
433 magicmouse_emit_touch(msc, ii, data + ii * 9 + 12);
434
435 clicks = data[1];
436 break;
437 case MOUSE_REPORT_ID:
438 /* Expect six bytes of prefix, and N*8 bytes of touch data. */
439 if (size < 6 || ((size - 6) % 8) != 0)
440 return 0;
441 npoints = (size - 6) / 8;
442 if (npoints > 15) {
443 hid_warn(hdev, "invalid size value (%d) for MOUSE_REPORT_ID\n",
444 size);
445 return 0;
446 }
447 msc->ntouches = 0;
448 for (ii = 0; ii < npoints; ii++)
449 magicmouse_emit_touch(msc, ii, data + ii * 8 + 6);
450
451 /* When emulating three-button mode, it is important
452 * to have the current touch information before
453 * generating a click event.
454 */
455 x = (int)(((data[3] & 0x0c) << 28) | (data[1] << 22)) >> 22;
456 y = (int)(((data[3] & 0x30) << 26) | (data[2] << 22)) >> 22;
457 clicks = data[3];
458
459 /* The following bits provide a device specific timestamp. They
460 * are unused here.
461 *
462 * ts = data[3] >> 6 | data[4] << 2 | data[5] << 10;
463 */
464 break;
465 case MOUSE2_REPORT_ID:
466 /* Size is either 8 or (14 + 8 * N) */
467 if (size != 8 && (size < 14 || (size - 14) % 8 != 0))
468 return 0;
469 npoints = (size - 14) / 8;
470 if (npoints > 15) {
471 hid_warn(hdev, "invalid size value (%d) for MOUSE2_REPORT_ID\n",
472 size);
473 return 0;
474 }
475 msc->ntouches = 0;
476 for (ii = 0; ii < npoints; ii++)
477 magicmouse_emit_touch(msc, ii, data + ii * 8 + 14);
478
479 /* When emulating three-button mode, it is important
480 * to have the current touch information before
481 * generating a click event.
482 */
483 x = (int)((data[3] << 24) | (data[2] << 16)) >> 16;
484 y = (int)((data[5] << 24) | (data[4] << 16)) >> 16;
485 clicks = data[1];
486
487 /* The following bits provide a device specific timestamp. They
488 * are unused here.
489 *
490 * ts = data[11] >> 6 | data[12] << 2 | data[13] << 10;
491 */
492 break;
493 case DOUBLE_REPORT_ID:
494 /* Sometimes the trackpad sends two touch reports in one
495 * packet.
496 */
497
498 /*
499 * A double report only ever wraps two normal reports, so it is
500 * never nested. Refuse to recurse a second time; otherwise a
501 * malicious device could chain DOUBLE_REPORT_ID packets to drive
502 * unbounded recursion and overflow the kernel stack.
503 */
504 if (nested)
505 return 0;
506
507 /* Ensure that we have at least 2 elements (report type and size) */
508 if (size < 2)
509 return 0;
510
511 if (size < data[1] + 2) {
512 hid_warn(hdev,
513 "received report length (%d) was smaller than specified (%d)",
514 size, data[1] + 2);
515 return 0;
516 }
517
518 __magicmouse_raw_event(hdev, report, data + 2, data[1], true);
519 __magicmouse_raw_event(hdev, report, data + 2 + data[1],
520 size - 2 - data[1], true);
521 return 0;
522 default:
523 return 0;
524 }
525
526 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
527 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
528 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) {
529 magicmouse_emit_buttons(msc, clicks & 3);
530 input_report_rel(input, REL_X, x);
531 input_report_rel(input, REL_Y, y);
532 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 ||
533 input->id.product ==
534 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) {
535 input_mt_sync_frame(input);
536 input_report_key(input, BTN_MOUSE, clicks & 1);
537 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
538 input_report_key(input, BTN_MOUSE, clicks & 1);
539 input_mt_report_pointer_emulation(input, true);
540 }
541
542 input_sync(input);
543 return 1;
544}
545
546static int magicmouse_raw_event(struct hid_device *hdev,
547 struct hid_report *report, u8 *data, int size)
548{
549 return __magicmouse_raw_event(hdev, report, data, size, false);
550}
551
552static int magicmouse_event(struct hid_device *hdev, struct hid_field *field,
553 struct hid_usage *usage, __s32 value)
554{
555 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
556 if ((msc->input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
557 msc->input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) &&
558 field->report->id == MOUSE2_REPORT_ID) {
559 /*
560 * magic_mouse_raw_event has done all the work. Skip hidinput.
561 *
562 * Specifically, hidinput may modify BTN_LEFT and BTN_RIGHT,
563 * breaking emulate_3button.
564 */
565 return 1;
566 }
567 return 0;
568}
569
570static int magicmouse_setup_input(struct input_dev *input, struct hid_device *hdev)
571{
572 int error;
573 int mt_flags = 0;
574
575 __set_bit(EV_KEY, input->evbit);
576
577 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
578 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
579 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) {
580 __set_bit(BTN_LEFT, input->keybit);
581 __set_bit(BTN_RIGHT, input->keybit);
582 if (emulate_3button)
583 __set_bit(BTN_MIDDLE, input->keybit);
584
585 __set_bit(EV_REL, input->evbit);
586 __set_bit(REL_X, input->relbit);
587 __set_bit(REL_Y, input->relbit);
588 if (emulate_scroll_wheel) {
589 __set_bit(REL_WHEEL, input->relbit);
590 __set_bit(REL_HWHEEL, input->relbit);
591 __set_bit(REL_WHEEL_HI_RES, input->relbit);
592 __set_bit(REL_HWHEEL_HI_RES, input->relbit);
593 }
594 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 ||
595 input->id.product ==
596 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) {
597 /* If the trackpad has been connected to a Mac, the name is
598 * automatically personalized, e.g., "José Expósito's Trackpad".
599 * When connected through Bluetooth, the personalized name is
600 * reported, however, when connected through USB the generic
601 * name is reported.
602 * Set the device name to ensure the same driver settings get
603 * loaded, whether connected through bluetooth or USB.
604 */
605 if (hdev->vendor == BT_VENDOR_ID_APPLE) {
606 if (input->id.version == TRACKPAD2_2021_BT_VERSION)
607 input->name = "Apple Inc. Magic Trackpad 2021";
608 else if (input->id.version == TRACKPAD_2024_BT_VERSION) {
609 input->name = "Apple Inc. Magic Trackpad USB-C";
610 } else {
611 input->name = "Apple Inc. Magic Trackpad";
612 }
613 } else { /* USB_VENDOR_ID_APPLE */
614 input->name = hdev->name;
615 }
616
617 __clear_bit(EV_MSC, input->evbit);
618 __clear_bit(BTN_0, input->keybit);
619 __clear_bit(BTN_RIGHT, input->keybit);
620 __clear_bit(BTN_MIDDLE, input->keybit);
621 __set_bit(BTN_MOUSE, input->keybit);
622 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
623 __set_bit(BTN_TOOL_FINGER, input->keybit);
624
625 mt_flags = INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
626 INPUT_MT_TRACK;
627 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
628 /* input->keybit is initialized with incorrect button info
629 * for Magic Trackpad. There really is only one physical
630 * button (BTN_LEFT == BTN_MOUSE). Make sure we don't
631 * advertise buttons that don't exist...
632 */
633 __clear_bit(BTN_RIGHT, input->keybit);
634 __clear_bit(BTN_MIDDLE, input->keybit);
635 __set_bit(BTN_MOUSE, input->keybit);
636 __set_bit(BTN_TOOL_FINGER, input->keybit);
637 __set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
638 __set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
639 __set_bit(BTN_TOOL_QUADTAP, input->keybit);
640 __set_bit(BTN_TOOL_QUINTTAP, input->keybit);
641 __set_bit(BTN_TOUCH, input->keybit);
642 __set_bit(INPUT_PROP_POINTER, input->propbit);
643 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
644 }
645
646
647 __set_bit(EV_ABS, input->evbit);
648
649 error = input_mt_init_slots(input, 16, mt_flags);
650 if (error)
651 return error;
652 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255 << 2,
653 4, 0);
654 input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255 << 2,
655 4, 0);
656
657 /* Note: Touch Y position from the device is inverted relative
658 * to how pointer motion is reported (and relative to how USB
659 * HID recommends the coordinates work). This driver keeps
660 * the origin at the same position, and just uses the additive
661 * inverse of the reported Y.
662 */
663 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
664 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
665 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) {
666 input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0);
667 input_set_abs_params(input, ABS_MT_POSITION_X,
668 MOUSE_MIN_X, MOUSE_MAX_X, 4, 0);
669 input_set_abs_params(input, ABS_MT_POSITION_Y,
670 MOUSE_MIN_Y, MOUSE_MAX_Y, 4, 0);
671
672 input_abs_set_res(input, ABS_MT_POSITION_X,
673 MOUSE_RES_X);
674 input_abs_set_res(input, ABS_MT_POSITION_Y,
675 MOUSE_RES_Y);
676 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 ||
677 input->id.product ==
678 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) {
679 input_set_abs_params(input, ABS_MT_PRESSURE, 0, 253, 0, 0);
680 input_set_abs_params(input, ABS_PRESSURE, 0, 253, 0, 0);
681 input_set_abs_params(input, ABS_MT_ORIENTATION, -3, 4, 0, 0);
682 input_set_abs_params(input, ABS_X, TRACKPAD2_MIN_X,
683 TRACKPAD2_MAX_X, 0, 0);
684 input_set_abs_params(input, ABS_Y, TRACKPAD2_MIN_Y,
685 TRACKPAD2_MAX_Y, 0, 0);
686 input_set_abs_params(input, ABS_MT_POSITION_X,
687 TRACKPAD2_MIN_X, TRACKPAD2_MAX_X, 0, 0);
688 input_set_abs_params(input, ABS_MT_POSITION_Y,
689 TRACKPAD2_MIN_Y, TRACKPAD2_MAX_Y, 0, 0);
690
691 input_abs_set_res(input, ABS_X, TRACKPAD2_RES_X);
692 input_abs_set_res(input, ABS_Y, TRACKPAD2_RES_Y);
693 input_abs_set_res(input, ABS_MT_POSITION_X, TRACKPAD2_RES_X);
694 input_abs_set_res(input, ABS_MT_POSITION_Y, TRACKPAD2_RES_Y);
695 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
696 input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0);
697 input_set_abs_params(input, ABS_X, TRACKPAD_MIN_X,
698 TRACKPAD_MAX_X, 4, 0);
699 input_set_abs_params(input, ABS_Y, TRACKPAD_MIN_Y,
700 TRACKPAD_MAX_Y, 4, 0);
701 input_set_abs_params(input, ABS_MT_POSITION_X,
702 TRACKPAD_MIN_X, TRACKPAD_MAX_X, 4, 0);
703 input_set_abs_params(input, ABS_MT_POSITION_Y,
704 TRACKPAD_MIN_Y, TRACKPAD_MAX_Y, 4, 0);
705
706 input_abs_set_res(input, ABS_X, TRACKPAD_RES_X);
707 input_abs_set_res(input, ABS_Y, TRACKPAD_RES_Y);
708 input_abs_set_res(input, ABS_MT_POSITION_X,
709 TRACKPAD_RES_X);
710 input_abs_set_res(input, ABS_MT_POSITION_Y,
711 TRACKPAD_RES_Y);
712 }
713
714 input_set_events_per_packet(input, 60);
715
716 if (report_undeciphered &&
717 input->id.product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 &&
718 input->id.product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) {
719 __set_bit(EV_MSC, input->evbit);
720 __set_bit(MSC_RAW, input->mscbit);
721 }
722
723 /*
724 * hid-input may mark device as using autorepeat, but neither
725 * the trackpad, nor the mouse actually want it.
726 */
727 __clear_bit(EV_REP, input->evbit);
728
729 return 0;
730}
731
732static int magicmouse_input_mapping(struct hid_device *hdev,
733 struct hid_input *hi, struct hid_field *field,
734 struct hid_usage *usage, unsigned long **bit, int *max)
735{
736 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
737
738 if (!msc->input)
739 msc->input = hi->input;
740
741 /* Magic Trackpad does not give relative data after switching to MT */
742 if ((hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD ||
743 hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 ||
744 hi->input->id.product ==
745 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) &&
746 field->flags & HID_MAIN_ITEM_RELATIVE)
747 return -1;
748
749 return 0;
750}
751
752static int magicmouse_input_configured(struct hid_device *hdev,
753 struct hid_input *hi)
754
755{
756 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
757 int ret;
758
759 if (!msc->input) {
760 hid_err(hdev, "magicmouse setup input failed (no input)");
761 return -EINVAL;
762 }
763
764 ret = magicmouse_setup_input(msc->input, hdev);
765 if (ret) {
766 hid_err(hdev, "magicmouse setup input failed (%d)\n", ret);
767 /* clean msc->input to notify probe() of the failure */
768 msc->input = NULL;
769 return ret;
770 }
771
772 return 0;
773}
774
775static int magicmouse_enable_multitouch(struct hid_device *hdev)
776{
777 const u8 *feature;
778 const u8 feature_mt[] = { 0xD7, 0x01 };
779 const u8 feature_mt_mouse2[] = { 0xF1, 0x02, 0x01 };
780 const u8 feature_mt_trackpad2_usb[] = { 0x02, 0x01 };
781 const u8 feature_mt_trackpad2_bt[] = { 0xF1, 0x02, 0x01 };
782 u8 *buf;
783 int ret;
784 int feature_size;
785
786 switch (hdev->product) {
787 case USB_DEVICE_ID_APPLE_MAGICTRACKPAD2:
788 case USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC:
789 switch (hdev->vendor) {
790 case BT_VENDOR_ID_APPLE:
791 feature_size = sizeof(feature_mt_trackpad2_bt);
792 feature = feature_mt_trackpad2_bt;
793 break;
794 default: /* USB_VENDOR_ID_APPLE */
795 feature_size = sizeof(feature_mt_trackpad2_usb);
796 feature = feature_mt_trackpad2_usb;
797 }
798 break;
799 case USB_DEVICE_ID_APPLE_MAGICMOUSE2:
800 case USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC:
801 feature_size = sizeof(feature_mt_mouse2);
802 feature = feature_mt_mouse2;
803 break;
804 default:
805 feature_size = sizeof(feature_mt);
806 feature = feature_mt;
807 }
808
809 buf = kmemdup(feature, feature_size, GFP_KERNEL);
810 if (!buf)
811 return -ENOMEM;
812
813 ret = hid_hw_raw_request(hdev, buf[0], buf, feature_size,
814 HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
815 kfree(buf);
816 return ret;
817}
818
819static void magicmouse_enable_mt_work(struct work_struct *work)
820{
821 struct magicmouse_sc *msc =
822 container_of(work, struct magicmouse_sc, work.work);
823 int ret;
824
825 ret = magicmouse_enable_multitouch(msc->hdev);
826 if (ret < 0)
827 hid_err(msc->hdev, "unable to request touch data (%d)\n", ret);
828}
829
830static bool is_usb_magicmouse2(__u32 vendor, __u32 product)
831{
832 if (vendor != USB_VENDOR_ID_APPLE)
833 return false;
834 return product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
835 product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC;
836}
837
838static bool is_usb_magictrackpad2(__u32 vendor, __u32 product)
839{
840 if (vendor != USB_VENDOR_ID_APPLE)
841 return false;
842 return product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 ||
843 product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC;
844}
845
846static bool is_bt_magictrackpad2(__u32 vendor, __u32 product)
847{
848 return vendor == BT_VENDOR_ID_APPLE &&
849 product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC;
850}
851
852static int magicmouse_fetch_battery(struct hid_device *hdev)
853{
854#ifdef CONFIG_HID_BATTERY_STRENGTH
855 struct hid_report_enum *report_enum;
856 struct hid_report *report;
857 struct hid_battery *bat;
858
859 bat = hid_get_battery(hdev);
860 if (!bat ||
861 (!is_usb_magicmouse2(hdev->vendor, hdev->product) &&
862 !is_usb_magictrackpad2(hdev->vendor, hdev->product) &&
863 !is_bt_magictrackpad2(hdev->vendor, hdev->product)))
864 return -1;
865
866 report_enum = &hdev->report_enum[bat->report_type];
867 report = report_enum->report_id_hash[bat->report_id];
868
869 if (!report || report->maxfield < 1)
870 return -1;
871
872 if (bat->capacity == bat->max)
873 return -1;
874
875 hid_hw_request(hdev, report, HID_REQ_GET_REPORT);
876 return 0;
877#else
878 return -1;
879#endif
880}
881
882static void magicmouse_battery_timer_tick(struct timer_list *t)
883{
884 struct magicmouse_sc *msc = timer_container_of(msc, t, battery_timer);
885 struct hid_device *hdev = msc->hdev;
886
887 if (magicmouse_fetch_battery(hdev) == 0) {
888 mod_timer(&msc->battery_timer,
889 jiffies + secs_to_jiffies(USB_BATTERY_TIMEOUT_SEC));
890 }
891}
892
893static int magicmouse_probe(struct hid_device *hdev,
894 const struct hid_device_id *id)
895{
896 struct magicmouse_sc *msc;
897 struct hid_report *report;
898 int ret;
899
900 msc = devm_kzalloc(&hdev->dev, sizeof(*msc), GFP_KERNEL);
901 if (msc == NULL) {
902 hid_err(hdev, "can't alloc magicmouse descriptor\n");
903 return -ENOMEM;
904 }
905
906 msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
907 msc->hdev = hdev;
908 INIT_DEFERRABLE_WORK(&msc->work, magicmouse_enable_mt_work);
909
910 msc->quirks = id->driver_data;
911 hid_set_drvdata(hdev, msc);
912
913 ret = hid_parse(hdev);
914 if (ret) {
915 hid_err(hdev, "magicmouse hid parse failed\n");
916 return ret;
917 }
918
919 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
920 if (ret) {
921 hid_err(hdev, "magicmouse hw start failed\n");
922 return ret;
923 }
924
925 /*
926 * When hidinput_connect() fails it frees every input device it
927 * created, but that does not fail hid_hw_start(): the core simply
928 * does not claim an input. msc->input, cached in ->input_mapping
929 * while the report descriptor was parsed, would then be a dangling
930 * pointer that passes every NULL check. Trust the core's claim.
931 */
932 if (!(hdev->claimed & HID_CLAIMED_INPUT))
933 msc->input = NULL;
934
935 if (is_usb_magicmouse2(id->vendor, id->product) ||
936 is_usb_magictrackpad2(id->vendor, id->product)) {
937 timer_setup(&msc->battery_timer, magicmouse_battery_timer_tick, 0);
938 mod_timer(&msc->battery_timer,
939 jiffies + secs_to_jiffies(USB_BATTERY_TIMEOUT_SEC));
940 magicmouse_fetch_battery(hdev);
941 }
942
943 if (is_usb_magicmouse2(id->vendor, id->product) ||
944 (is_usb_magictrackpad2(id->vendor, id->product) &&
945 hdev->type != HID_TYPE_USBMOUSE))
946 return 0;
947
948 if (!msc->input) {
949 hid_err(hdev, "magicmouse input not registered\n");
950 ret = -ENOMEM;
951 goto err_stop_hw;
952 }
953
954 switch (id->product) {
955 case USB_DEVICE_ID_APPLE_MAGICMOUSE:
956 report = hid_register_report(hdev, HID_INPUT_REPORT, MOUSE_REPORT_ID, 0);
957 break;
958 case USB_DEVICE_ID_APPLE_MAGICMOUSE2:
959 case USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC:
960 report = hid_register_report(hdev, HID_INPUT_REPORT, MOUSE2_REPORT_ID, 0);
961 break;
962 case USB_DEVICE_ID_APPLE_MAGICTRACKPAD2:
963 case USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC:
964 switch (id->vendor) {
965 case BT_VENDOR_ID_APPLE:
966 report = hid_register_report(hdev, HID_INPUT_REPORT,
967 TRACKPAD2_BT_REPORT_ID, 0);
968 break;
969 default:
970 report = hid_register_report(hdev, HID_INPUT_REPORT,
971 TRACKPAD2_USB_REPORT_ID, 0);
972 }
973 break;
974 default: /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
975 report = hid_register_report(hdev, HID_INPUT_REPORT,
976 TRACKPAD_REPORT_ID, 0);
977 report = hid_register_report(hdev, HID_INPUT_REPORT,
978 DOUBLE_REPORT_ID, 0);
979 }
980
981 if (!report) {
982 hid_err(hdev, "unable to register touch report\n");
983 ret = -ENOMEM;
984 goto err_stop_hw;
985 }
986 report->size = 6;
987
988 /*
989 * Some devices repond with 'invalid report id' when feature
990 * report switching it into multitouch mode is sent to it.
991 *
992 * This results in -EIO from the _raw low-level transport callback,
993 * but there seems to be no other way of switching the mode.
994 * Thus the super-ugly hacky success check below.
995 */
996 ret = magicmouse_enable_multitouch(hdev);
997 if (ret != -EIO && ret < 0) {
998 hid_err(hdev, "unable to request touch data (%d)\n", ret);
999 goto err_stop_hw;
1000 }
1001 if (ret == -EIO && (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
1002 id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC)) {
1003 schedule_delayed_work(&msc->work, msecs_to_jiffies(500));
1004 }
1005
1006 /*
1007 * Query the Bluetooth Magic Trackpad USB-C battery as done for USB.
1008 * Start io first: probe holds driver_input_lock and the synchronous
1009 * GET_REPORT reply would otherwise be dropped.
1010 */
1011 if (is_bt_magictrackpad2(id->vendor, id->product)) {
1012 hid_device_io_start(hdev);
1013 magicmouse_fetch_battery(hdev);
1014 }
1015
1016 return 0;
1017err_stop_hw:
1018 if (is_usb_magicmouse2(id->vendor, id->product) ||
1019 is_usb_magictrackpad2(id->vendor, id->product))
1020 timer_delete_sync(&msc->battery_timer);
1021
1022 hid_hw_stop(hdev);
1023 return ret;
1024}
1025
1026static void magicmouse_remove(struct hid_device *hdev)
1027{
1028 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
1029
1030 if (msc) {
1031 cancel_delayed_work_sync(&msc->work);
1032 if (is_usb_magicmouse2(hdev->vendor, hdev->product) ||
1033 is_usb_magictrackpad2(hdev->vendor, hdev->product))
1034 timer_delete_sync(&msc->battery_timer);
1035 }
1036
1037 hid_hw_stop(hdev);
1038}
1039
1040#ifdef CONFIG_PM
1041static int magicmouse_reset_resume(struct hid_device *hdev)
1042{
1043 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
1044
1045 /* The device drops out of multitouch mode on resume; re-send the
1046 * enable report. Only the HID_TYPE_USBMOUSE interface accepts it, and
1047 * it must be deferred. Sending it inline here is too early.
1048 */
1049 if (msc && hdev->type == HID_TYPE_USBMOUSE)
1050 schedule_delayed_work(&msc->work, msecs_to_jiffies(500));
1051
1052 return 0;
1053}
1054#endif
1055
1056static const __u8 *magicmouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
1057 unsigned int *rsize)
1058{
1059 /*
1060 * Change the usage from:
1061 * 0x06, 0x00, 0xff, // Usage Page (Vendor Defined Page 1) 0
1062 * 0x09, 0x0b, // Usage (Vendor Usage 0x0b) 3
1063 * To:
1064 * 0x05, 0x01, // Usage Page (Generic Desktop) 0
1065 * 0x09, 0x02, // Usage (Mouse) 2
1066 */
1067 if ((is_usb_magicmouse2(hdev->vendor, hdev->product) ||
1068 is_usb_magictrackpad2(hdev->vendor, hdev->product)) &&
1069 *rsize >= 83 && rdesc[46] == 0x84 && rdesc[58] == 0x85) {
1070 hid_info(hdev,
1071 "fixing up magicmouse battery report descriptor\n");
1072 *rsize = *rsize - 1;
1073 rdesc = rdesc + 1;
1074
1075 rdesc[0] = 0x05;
1076 rdesc[1] = 0x01;
1077 rdesc[2] = 0x09;
1078 rdesc[3] = 0x02;
1079 }
1080
1081 return rdesc;
1082}
1083
1084static const struct hid_device_id magic_mice[] = {
1085 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
1086 USB_DEVICE_ID_APPLE_MAGICMOUSE), .driver_data = 0 },
1087 { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE,
1088 USB_DEVICE_ID_APPLE_MAGICMOUSE2), .driver_data = 0 },
1089 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
1090 USB_DEVICE_ID_APPLE_MAGICMOUSE2), .driver_data = 0 },
1091 { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE,
1092 USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC), .driver_data = 0 },
1093 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
1094 USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC), .driver_data = 0 },
1095 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
1096 USB_DEVICE_ID_APPLE_MAGICTRACKPAD), .driver_data = 0 },
1097 { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE,
1098 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2), .driver_data = 0 },
1099 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
1100 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2), .driver_data = 0 },
1101 { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE,
1102 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC), .driver_data = 0 },
1103 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
1104 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC), .driver_data = 0 },
1105 { }
1106};
1107MODULE_DEVICE_TABLE(hid, magic_mice);
1108
1109static struct hid_driver magicmouse_driver = {
1110 .name = "magicmouse",
1111 .id_table = magic_mice,
1112 .probe = magicmouse_probe,
1113 .remove = magicmouse_remove,
1114 .report_fixup = magicmouse_report_fixup,
1115 .raw_event = magicmouse_raw_event,
1116 .event = magicmouse_event,
1117 .input_mapping = magicmouse_input_mapping,
1118 .input_configured = magicmouse_input_configured,
1119#ifdef CONFIG_PM
1120 .reset_resume = magicmouse_reset_resume,
1121#endif
1122};
1123module_hid_driver(magicmouse_driver);
1124
1125MODULE_DESCRIPTION("Apple \"Magic\" Wireless Mouse driver");
1126MODULE_LICENSE("GPL");