Loading...
1/*
2 * Apple "Magic" Wireless Mouse driver
3 *
4 * Copyright (c) 2010 Michael Poole <mdpoole@troilus.org>
5 * Copyright (c) 2010 Chase Douglas <chase.douglas@canonical.com>
6 */
7
8/*
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
12 * any later version.
13 */
14
15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17#include <linux/device.h>
18#include <linux/hid.h>
19#include <linux/input/mt.h>
20#include <linux/module.h>
21#include <linux/slab.h>
22
23#include "hid-ids.h"
24
25static bool emulate_3button = true;
26module_param(emulate_3button, bool, 0644);
27MODULE_PARM_DESC(emulate_3button, "Emulate a middle button");
28
29static int middle_button_start = -350;
30static int middle_button_stop = +350;
31
32static bool emulate_scroll_wheel = true;
33module_param(emulate_scroll_wheel, bool, 0644);
34MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel");
35
36static unsigned int scroll_speed = 32;
37static int param_set_scroll_speed(const char *val, struct kernel_param *kp) {
38 unsigned long speed;
39 if (!val || kstrtoul(val, 0, &speed) || speed > 63)
40 return -EINVAL;
41 scroll_speed = speed;
42 return 0;
43}
44module_param_call(scroll_speed, param_set_scroll_speed, param_get_uint, &scroll_speed, 0644);
45MODULE_PARM_DESC(scroll_speed, "Scroll speed, value from 0 (slow) to 63 (fast)");
46
47static bool scroll_acceleration = false;
48module_param(scroll_acceleration, bool, 0644);
49MODULE_PARM_DESC(scroll_acceleration, "Accelerate sequential scroll events");
50
51static bool report_undeciphered;
52module_param(report_undeciphered, bool, 0644);
53MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event");
54
55#define TRACKPAD_REPORT_ID 0x28
56#define MOUSE_REPORT_ID 0x29
57#define DOUBLE_REPORT_ID 0xf7
58/* These definitions are not precise, but they're close enough. (Bits
59 * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem
60 * to be some kind of bit mask -- 0x20 may be a near-field reading,
61 * and 0x40 is actual contact, and 0x10 may be a start/stop or change
62 * indication.)
63 */
64#define TOUCH_STATE_MASK 0xf0
65#define TOUCH_STATE_NONE 0x00
66#define TOUCH_STATE_START 0x30
67#define TOUCH_STATE_DRAG 0x40
68
69#define SCROLL_ACCEL_DEFAULT 7
70
71/* Touch surface information. Dimension is in hundredths of a mm, min and max
72 * are in units. */
73#define MOUSE_DIMENSION_X (float)9056
74#define MOUSE_MIN_X -1100
75#define MOUSE_MAX_X 1258
76#define MOUSE_RES_X ((MOUSE_MAX_X - MOUSE_MIN_X) / (MOUSE_DIMENSION_X / 100))
77#define MOUSE_DIMENSION_Y (float)5152
78#define MOUSE_MIN_Y -1589
79#define MOUSE_MAX_Y 2047
80#define MOUSE_RES_Y ((MOUSE_MAX_Y - MOUSE_MIN_Y) / (MOUSE_DIMENSION_Y / 100))
81
82#define TRACKPAD_DIMENSION_X (float)13000
83#define TRACKPAD_MIN_X -2909
84#define TRACKPAD_MAX_X 3167
85#define TRACKPAD_RES_X \
86 ((TRACKPAD_MAX_X - TRACKPAD_MIN_X) / (TRACKPAD_DIMENSION_X / 100))
87#define TRACKPAD_DIMENSION_Y (float)11000
88#define TRACKPAD_MIN_Y -2456
89#define TRACKPAD_MAX_Y 2565
90#define TRACKPAD_RES_Y \
91 ((TRACKPAD_MAX_Y - TRACKPAD_MIN_Y) / (TRACKPAD_DIMENSION_Y / 100))
92
93/**
94 * struct magicmouse_sc - Tracks Magic Mouse-specific data.
95 * @input: Input device through which we report events.
96 * @quirks: Currently unused.
97 * @ntouches: Number of touches in most recent touch report.
98 * @scroll_accel: Number of consecutive scroll motions.
99 * @scroll_jiffies: Time of last scroll motion.
100 * @touches: Most recent data for a touch, indexed by tracking ID.
101 * @tracking_ids: Mapping of current touch input data to @touches.
102 */
103struct magicmouse_sc {
104 struct input_dev *input;
105 unsigned long quirks;
106
107 int ntouches;
108 int scroll_accel;
109 unsigned long scroll_jiffies;
110
111 struct {
112 short x;
113 short y;
114 short scroll_x;
115 short scroll_y;
116 u8 size;
117 } touches[16];
118 int tracking_ids[16];
119};
120
121static int magicmouse_firm_touch(struct magicmouse_sc *msc)
122{
123 int touch = -1;
124 int ii;
125
126 /* If there is only one "firm" touch, set touch to its
127 * tracking ID.
128 */
129 for (ii = 0; ii < msc->ntouches; ii++) {
130 int idx = msc->tracking_ids[ii];
131 if (msc->touches[idx].size < 8) {
132 /* Ignore this touch. */
133 } else if (touch >= 0) {
134 touch = -1;
135 break;
136 } else {
137 touch = idx;
138 }
139 }
140
141 return touch;
142}
143
144static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
145{
146 int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
147 test_bit(BTN_RIGHT, msc->input->key) << 1 |
148 test_bit(BTN_MIDDLE, msc->input->key) << 2;
149
150 if (emulate_3button) {
151 int id;
152
153 /* If some button was pressed before, keep it held
154 * down. Otherwise, if there's exactly one firm
155 * touch, use that to override the mouse's guess.
156 */
157 if (state == 0) {
158 /* The button was released. */
159 } else if (last_state != 0) {
160 state = last_state;
161 } else if ((id = magicmouse_firm_touch(msc)) >= 0) {
162 int x = msc->touches[id].x;
163 if (x < middle_button_start)
164 state = 1;
165 else if (x > middle_button_stop)
166 state = 2;
167 else
168 state = 4;
169 } /* else: we keep the mouse's guess */
170
171 input_report_key(msc->input, BTN_MIDDLE, state & 4);
172 }
173
174 input_report_key(msc->input, BTN_LEFT, state & 1);
175 input_report_key(msc->input, BTN_RIGHT, state & 2);
176
177 if (state != last_state)
178 msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
179}
180
181static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata)
182{
183 struct input_dev *input = msc->input;
184 int id, x, y, size, orientation, touch_major, touch_minor, state, down;
185
186 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
187 id = (tdata[6] << 2 | tdata[5] >> 6) & 0xf;
188 x = (tdata[1] << 28 | tdata[0] << 20) >> 20;
189 y = -((tdata[2] << 24 | tdata[1] << 16) >> 20);
190 size = tdata[5] & 0x3f;
191 orientation = (tdata[6] >> 2) - 32;
192 touch_major = tdata[3];
193 touch_minor = tdata[4];
194 state = tdata[7] & TOUCH_STATE_MASK;
195 down = state != TOUCH_STATE_NONE;
196 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
197 id = (tdata[7] << 2 | tdata[6] >> 6) & 0xf;
198 x = (tdata[1] << 27 | tdata[0] << 19) >> 19;
199 y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19);
200 size = tdata[6] & 0x3f;
201 orientation = (tdata[7] >> 2) - 32;
202 touch_major = tdata[4];
203 touch_minor = tdata[5];
204 state = tdata[8] & TOUCH_STATE_MASK;
205 down = state != TOUCH_STATE_NONE;
206 }
207
208 /* Store tracking ID and other fields. */
209 msc->tracking_ids[raw_id] = id;
210 msc->touches[id].x = x;
211 msc->touches[id].y = y;
212 msc->touches[id].size = size;
213
214 /* If requested, emulate a scroll wheel by detecting small
215 * vertical touch motions.
216 */
217 if (emulate_scroll_wheel) {
218 unsigned long now = jiffies;
219 int step_x = msc->touches[id].scroll_x - x;
220 int step_y = msc->touches[id].scroll_y - y;
221
222 /* Calculate and apply the scroll motion. */
223 switch (state) {
224 case TOUCH_STATE_START:
225 msc->touches[id].scroll_x = x;
226 msc->touches[id].scroll_y = y;
227
228 /* Reset acceleration after half a second. */
229 if (scroll_acceleration && time_before(now,
230 msc->scroll_jiffies + HZ / 2))
231 msc->scroll_accel = max_t(int,
232 msc->scroll_accel - 1, 1);
233 else
234 msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
235
236 break;
237 case TOUCH_STATE_DRAG:
238 step_x /= (64 - (int)scroll_speed) * msc->scroll_accel;
239 if (step_x != 0) {
240 msc->touches[id].scroll_x -= step_x *
241 (64 - scroll_speed) * msc->scroll_accel;
242 msc->scroll_jiffies = now;
243 input_report_rel(input, REL_HWHEEL, -step_x);
244 }
245
246 step_y /= (64 - (int)scroll_speed) * msc->scroll_accel;
247 if (step_y != 0) {
248 msc->touches[id].scroll_y -= step_y *
249 (64 - scroll_speed) * msc->scroll_accel;
250 msc->scroll_jiffies = now;
251 input_report_rel(input, REL_WHEEL, step_y);
252 }
253 break;
254 }
255 }
256
257 if (down)
258 msc->ntouches++;
259
260 input_mt_slot(input, id);
261 input_mt_report_slot_state(input, MT_TOOL_FINGER, down);
262
263 /* Generate the input events for this touch. */
264 if (down) {
265 input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major << 2);
266 input_report_abs(input, ABS_MT_TOUCH_MINOR, touch_minor << 2);
267 input_report_abs(input, ABS_MT_ORIENTATION, -orientation);
268 input_report_abs(input, ABS_MT_POSITION_X, x);
269 input_report_abs(input, ABS_MT_POSITION_Y, y);
270
271 if (report_undeciphered) {
272 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE)
273 input_event(input, EV_MSC, MSC_RAW, tdata[7]);
274 else /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
275 input_event(input, EV_MSC, MSC_RAW, tdata[8]);
276 }
277 }
278}
279
280static int magicmouse_raw_event(struct hid_device *hdev,
281 struct hid_report *report, u8 *data, int size)
282{
283 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
284 struct input_dev *input = msc->input;
285 int x = 0, y = 0, ii, clicks = 0, npoints;
286
287 switch (data[0]) {
288 case TRACKPAD_REPORT_ID:
289 /* Expect four bytes of prefix, and N*9 bytes of touch data. */
290 if (size < 4 || ((size - 4) % 9) != 0)
291 return 0;
292 npoints = (size - 4) / 9;
293 if (npoints > 15) {
294 hid_warn(hdev, "invalid size value (%d) for TRACKPAD_REPORT_ID\n",
295 size);
296 return 0;
297 }
298 msc->ntouches = 0;
299 for (ii = 0; ii < npoints; ii++)
300 magicmouse_emit_touch(msc, ii, data + ii * 9 + 4);
301
302 clicks = data[1];
303
304 /* The following bits provide a device specific timestamp. They
305 * are unused here.
306 *
307 * ts = data[1] >> 6 | data[2] << 2 | data[3] << 10;
308 */
309 break;
310 case MOUSE_REPORT_ID:
311 /* Expect six bytes of prefix, and N*8 bytes of touch data. */
312 if (size < 6 || ((size - 6) % 8) != 0)
313 return 0;
314 npoints = (size - 6) / 8;
315 if (npoints > 15) {
316 hid_warn(hdev, "invalid size value (%d) for MOUSE_REPORT_ID\n",
317 size);
318 return 0;
319 }
320 msc->ntouches = 0;
321 for (ii = 0; ii < npoints; ii++)
322 magicmouse_emit_touch(msc, ii, data + ii * 8 + 6);
323
324 /* When emulating three-button mode, it is important
325 * to have the current touch information before
326 * generating a click event.
327 */
328 x = (int)(((data[3] & 0x0c) << 28) | (data[1] << 22)) >> 22;
329 y = (int)(((data[3] & 0x30) << 26) | (data[2] << 22)) >> 22;
330 clicks = data[3];
331
332 /* The following bits provide a device specific timestamp. They
333 * are unused here.
334 *
335 * ts = data[3] >> 6 | data[4] << 2 | data[5] << 10;
336 */
337 break;
338 case DOUBLE_REPORT_ID:
339 /* Sometimes the trackpad sends two touch reports in one
340 * packet.
341 */
342 magicmouse_raw_event(hdev, report, data + 2, data[1]);
343 magicmouse_raw_event(hdev, report, data + 2 + data[1],
344 size - 2 - data[1]);
345 break;
346 default:
347 return 0;
348 }
349
350 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
351 magicmouse_emit_buttons(msc, clicks & 3);
352 input_report_rel(input, REL_X, x);
353 input_report_rel(input, REL_Y, y);
354 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
355 input_report_key(input, BTN_MOUSE, clicks & 1);
356 input_mt_report_pointer_emulation(input, true);
357 }
358
359 input_sync(input);
360 return 1;
361}
362
363static int magicmouse_setup_input(struct input_dev *input, struct hid_device *hdev)
364{
365 int error;
366
367 __set_bit(EV_KEY, input->evbit);
368
369 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
370 __set_bit(BTN_LEFT, input->keybit);
371 __set_bit(BTN_RIGHT, input->keybit);
372 if (emulate_3button)
373 __set_bit(BTN_MIDDLE, input->keybit);
374
375 __set_bit(EV_REL, input->evbit);
376 __set_bit(REL_X, input->relbit);
377 __set_bit(REL_Y, input->relbit);
378 if (emulate_scroll_wheel) {
379 __set_bit(REL_WHEEL, input->relbit);
380 __set_bit(REL_HWHEEL, input->relbit);
381 }
382 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
383 /* input->keybit is initialized with incorrect button info
384 * for Magic Trackpad. There really is only one physical
385 * button (BTN_LEFT == BTN_MOUSE). Make sure we don't
386 * advertise buttons that don't exist...
387 */
388 __clear_bit(BTN_RIGHT, input->keybit);
389 __clear_bit(BTN_MIDDLE, input->keybit);
390 __set_bit(BTN_MOUSE, input->keybit);
391 __set_bit(BTN_TOOL_FINGER, input->keybit);
392 __set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
393 __set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
394 __set_bit(BTN_TOOL_QUADTAP, input->keybit);
395 __set_bit(BTN_TOOL_QUINTTAP, input->keybit);
396 __set_bit(BTN_TOUCH, input->keybit);
397 __set_bit(INPUT_PROP_POINTER, input->propbit);
398 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
399 }
400
401
402 __set_bit(EV_ABS, input->evbit);
403
404 error = input_mt_init_slots(input, 16, 0);
405 if (error)
406 return error;
407 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255 << 2,
408 4, 0);
409 input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255 << 2,
410 4, 0);
411 input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0);
412
413 /* Note: Touch Y position from the device is inverted relative
414 * to how pointer motion is reported (and relative to how USB
415 * HID recommends the coordinates work). This driver keeps
416 * the origin at the same position, and just uses the additive
417 * inverse of the reported Y.
418 */
419 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
420 input_set_abs_params(input, ABS_MT_POSITION_X,
421 MOUSE_MIN_X, MOUSE_MAX_X, 4, 0);
422 input_set_abs_params(input, ABS_MT_POSITION_Y,
423 MOUSE_MIN_Y, MOUSE_MAX_Y, 4, 0);
424
425 input_abs_set_res(input, ABS_MT_POSITION_X,
426 MOUSE_RES_X);
427 input_abs_set_res(input, ABS_MT_POSITION_Y,
428 MOUSE_RES_Y);
429 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
430 input_set_abs_params(input, ABS_X, TRACKPAD_MIN_X,
431 TRACKPAD_MAX_X, 4, 0);
432 input_set_abs_params(input, ABS_Y, TRACKPAD_MIN_Y,
433 TRACKPAD_MAX_Y, 4, 0);
434 input_set_abs_params(input, ABS_MT_POSITION_X,
435 TRACKPAD_MIN_X, TRACKPAD_MAX_X, 4, 0);
436 input_set_abs_params(input, ABS_MT_POSITION_Y,
437 TRACKPAD_MIN_Y, TRACKPAD_MAX_Y, 4, 0);
438
439 input_abs_set_res(input, ABS_X, TRACKPAD_RES_X);
440 input_abs_set_res(input, ABS_Y, TRACKPAD_RES_Y);
441 input_abs_set_res(input, ABS_MT_POSITION_X,
442 TRACKPAD_RES_X);
443 input_abs_set_res(input, ABS_MT_POSITION_Y,
444 TRACKPAD_RES_Y);
445 }
446
447 input_set_events_per_packet(input, 60);
448
449 if (report_undeciphered) {
450 __set_bit(EV_MSC, input->evbit);
451 __set_bit(MSC_RAW, input->mscbit);
452 }
453
454 return 0;
455}
456
457static int magicmouse_input_mapping(struct hid_device *hdev,
458 struct hid_input *hi, struct hid_field *field,
459 struct hid_usage *usage, unsigned long **bit, int *max)
460{
461 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
462
463 if (!msc->input)
464 msc->input = hi->input;
465
466 /* Magic Trackpad does not give relative data after switching to MT */
467 if (hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD &&
468 field->flags & HID_MAIN_ITEM_RELATIVE)
469 return -1;
470
471 return 0;
472}
473
474static int magicmouse_input_configured(struct hid_device *hdev,
475 struct hid_input *hi)
476
477{
478 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
479 int ret;
480
481 ret = magicmouse_setup_input(msc->input, hdev);
482 if (ret) {
483 hid_err(hdev, "magicmouse setup input failed (%d)\n", ret);
484 /* clean msc->input to notify probe() of the failure */
485 msc->input = NULL;
486 return ret;
487 }
488
489 return 0;
490}
491
492
493static int magicmouse_probe(struct hid_device *hdev,
494 const struct hid_device_id *id)
495{
496 __u8 feature[] = { 0xd7, 0x01 };
497 struct magicmouse_sc *msc;
498 struct hid_report *report;
499 int ret;
500
501 msc = devm_kzalloc(&hdev->dev, sizeof(*msc), GFP_KERNEL);
502 if (msc == NULL) {
503 hid_err(hdev, "can't alloc magicmouse descriptor\n");
504 return -ENOMEM;
505 }
506
507 msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
508
509 msc->quirks = id->driver_data;
510 hid_set_drvdata(hdev, msc);
511
512 ret = hid_parse(hdev);
513 if (ret) {
514 hid_err(hdev, "magicmouse hid parse failed\n");
515 return ret;
516 }
517
518 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
519 if (ret) {
520 hid_err(hdev, "magicmouse hw start failed\n");
521 return ret;
522 }
523
524 if (!msc->input) {
525 hid_err(hdev, "magicmouse input not registered\n");
526 ret = -ENOMEM;
527 goto err_stop_hw;
528 }
529
530 if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE)
531 report = hid_register_report(hdev, HID_INPUT_REPORT,
532 MOUSE_REPORT_ID);
533 else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
534 report = hid_register_report(hdev, HID_INPUT_REPORT,
535 TRACKPAD_REPORT_ID);
536 report = hid_register_report(hdev, HID_INPUT_REPORT,
537 DOUBLE_REPORT_ID);
538 }
539
540 if (!report) {
541 hid_err(hdev, "unable to register touch report\n");
542 ret = -ENOMEM;
543 goto err_stop_hw;
544 }
545 report->size = 6;
546
547 /*
548 * Some devices repond with 'invalid report id' when feature
549 * report switching it into multitouch mode is sent to it.
550 *
551 * This results in -EIO from the _raw low-level transport callback,
552 * but there seems to be no other way of switching the mode.
553 * Thus the super-ugly hacky success check below.
554 */
555 ret = hid_hw_raw_request(hdev, feature[0], feature, sizeof(feature),
556 HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
557 if (ret != -EIO && ret != sizeof(feature)) {
558 hid_err(hdev, "unable to request touch data (%d)\n", ret);
559 goto err_stop_hw;
560 }
561
562 return 0;
563err_stop_hw:
564 hid_hw_stop(hdev);
565 return ret;
566}
567
568static const struct hid_device_id magic_mice[] = {
569 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
570 USB_DEVICE_ID_APPLE_MAGICMOUSE), .driver_data = 0 },
571 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
572 USB_DEVICE_ID_APPLE_MAGICTRACKPAD), .driver_data = 0 },
573 { }
574};
575MODULE_DEVICE_TABLE(hid, magic_mice);
576
577static struct hid_driver magicmouse_driver = {
578 .name = "magicmouse",
579 .id_table = magic_mice,
580 .probe = magicmouse_probe,
581 .raw_event = magicmouse_raw_event,
582 .input_mapping = magicmouse_input_mapping,
583 .input_configured = magicmouse_input_configured,
584};
585module_hid_driver(magicmouse_driver);
586
587MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Apple "Magic" Wireless Mouse driver
4 *
5 * Copyright (c) 2010 Michael Poole <mdpoole@troilus.org>
6 * Copyright (c) 2010 Chase Douglas <chase.douglas@canonical.com>
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
56#define TRACKPAD_REPORT_ID 0x28
57#define TRACKPAD2_USB_REPORT_ID 0x02
58#define TRACKPAD2_BT_REPORT_ID 0x31
59#define MOUSE_REPORT_ID 0x29
60#define MOUSE2_REPORT_ID 0x12
61#define DOUBLE_REPORT_ID 0xf7
62#define USB_BATTERY_TIMEOUT_MS 60000
63
64/* These definitions are not precise, but they're close enough. (Bits
65 * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem
66 * to be some kind of bit mask -- 0x20 may be a near-field reading,
67 * and 0x40 is actual contact, and 0x10 may be a start/stop or change
68 * indication.)
69 */
70#define TOUCH_STATE_MASK 0xf0
71#define TOUCH_STATE_NONE 0x00
72#define TOUCH_STATE_START 0x30
73#define TOUCH_STATE_DRAG 0x40
74
75/* Number of high-resolution events for each low-resolution detent. */
76#define SCROLL_HR_STEPS 10
77#define SCROLL_HR_MULT (120 / SCROLL_HR_STEPS)
78#define SCROLL_HR_THRESHOLD 90 /* units */
79#define SCROLL_ACCEL_DEFAULT 7
80
81/* Touch surface information. Dimension is in hundredths of a mm, min and max
82 * are in units. */
83#define MOUSE_DIMENSION_X (float)9056
84#define MOUSE_MIN_X -1100
85#define MOUSE_MAX_X 1258
86#define MOUSE_RES_X ((MOUSE_MAX_X - MOUSE_MIN_X) / (MOUSE_DIMENSION_X / 100))
87#define MOUSE_DIMENSION_Y (float)5152
88#define MOUSE_MIN_Y -1589
89#define MOUSE_MAX_Y 2047
90#define MOUSE_RES_Y ((MOUSE_MAX_Y - MOUSE_MIN_Y) / (MOUSE_DIMENSION_Y / 100))
91
92#define TRACKPAD_DIMENSION_X (float)13000
93#define TRACKPAD_MIN_X -2909
94#define TRACKPAD_MAX_X 3167
95#define TRACKPAD_RES_X \
96 ((TRACKPAD_MAX_X - TRACKPAD_MIN_X) / (TRACKPAD_DIMENSION_X / 100))
97#define TRACKPAD_DIMENSION_Y (float)11000
98#define TRACKPAD_MIN_Y -2456
99#define TRACKPAD_MAX_Y 2565
100#define TRACKPAD_RES_Y \
101 ((TRACKPAD_MAX_Y - TRACKPAD_MIN_Y) / (TRACKPAD_DIMENSION_Y / 100))
102
103#define TRACKPAD2_DIMENSION_X (float)16000
104#define TRACKPAD2_MIN_X -3678
105#define TRACKPAD2_MAX_X 3934
106#define TRACKPAD2_RES_X \
107 ((TRACKPAD2_MAX_X - TRACKPAD2_MIN_X) / (TRACKPAD2_DIMENSION_X / 100))
108#define TRACKPAD2_DIMENSION_Y (float)11490
109#define TRACKPAD2_MIN_Y -2478
110#define TRACKPAD2_MAX_Y 2587
111#define TRACKPAD2_RES_Y \
112 ((TRACKPAD2_MAX_Y - TRACKPAD2_MIN_Y) / (TRACKPAD2_DIMENSION_Y / 100))
113
114/**
115 * struct magicmouse_sc - Tracks Magic Mouse-specific data.
116 * @input: Input device through which we report events.
117 * @quirks: Currently unused.
118 * @ntouches: Number of touches in most recent touch report.
119 * @scroll_accel: Number of consecutive scroll motions.
120 * @scroll_jiffies: Time of last scroll motion.
121 * @touches: Most recent data for a touch, indexed by tracking ID.
122 * @tracking_ids: Mapping of current touch input data to @touches.
123 */
124struct magicmouse_sc {
125 struct input_dev *input;
126 unsigned long quirks;
127
128 int ntouches;
129 int scroll_accel;
130 unsigned long scroll_jiffies;
131
132 struct {
133 short x;
134 short y;
135 short scroll_x;
136 short scroll_y;
137 short scroll_x_hr;
138 short scroll_y_hr;
139 u8 size;
140 bool scroll_x_active;
141 bool scroll_y_active;
142 } touches[16];
143 int tracking_ids[16];
144
145 struct hid_device *hdev;
146 struct delayed_work work;
147 struct timer_list battery_timer;
148};
149
150static int magicmouse_firm_touch(struct magicmouse_sc *msc)
151{
152 int touch = -1;
153 int ii;
154
155 /* If there is only one "firm" touch, set touch to its
156 * tracking ID.
157 */
158 for (ii = 0; ii < msc->ntouches; ii++) {
159 int idx = msc->tracking_ids[ii];
160 if (msc->touches[idx].size < 8) {
161 /* Ignore this touch. */
162 } else if (touch >= 0) {
163 touch = -1;
164 break;
165 } else {
166 touch = idx;
167 }
168 }
169
170 return touch;
171}
172
173static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
174{
175 int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
176 test_bit(BTN_RIGHT, msc->input->key) << 1 |
177 test_bit(BTN_MIDDLE, msc->input->key) << 2;
178
179 if (emulate_3button) {
180 int id;
181
182 /* If some button was pressed before, keep it held
183 * down. Otherwise, if there's exactly one firm
184 * touch, use that to override the mouse's guess.
185 */
186 if (state == 0) {
187 /* The button was released. */
188 } else if (last_state != 0) {
189 state = last_state;
190 } else if ((id = magicmouse_firm_touch(msc)) >= 0) {
191 int x = msc->touches[id].x;
192 if (x < middle_button_start)
193 state = 1;
194 else if (x > middle_button_stop)
195 state = 2;
196 else
197 state = 4;
198 } /* else: we keep the mouse's guess */
199
200 input_report_key(msc->input, BTN_MIDDLE, state & 4);
201 }
202
203 input_report_key(msc->input, BTN_LEFT, state & 1);
204 input_report_key(msc->input, BTN_RIGHT, state & 2);
205
206 if (state != last_state)
207 msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
208}
209
210static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata)
211{
212 struct input_dev *input = msc->input;
213 int id, x, y, size, orientation, touch_major, touch_minor, state, down;
214 int pressure = 0;
215
216 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
217 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
218 id = (tdata[6] << 2 | tdata[5] >> 6) & 0xf;
219 x = (tdata[1] << 28 | tdata[0] << 20) >> 20;
220 y = -((tdata[2] << 24 | tdata[1] << 16) >> 20);
221 size = tdata[5] & 0x3f;
222 orientation = (tdata[6] >> 2) - 32;
223 touch_major = tdata[3];
224 touch_minor = tdata[4];
225 state = tdata[7] & TOUCH_STATE_MASK;
226 down = state != TOUCH_STATE_NONE;
227 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
228 id = tdata[8] & 0xf;
229 x = (tdata[1] << 27 | tdata[0] << 19) >> 19;
230 y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19);
231 size = tdata[6];
232 orientation = (tdata[8] >> 5) - 4;
233 touch_major = tdata[4];
234 touch_minor = tdata[5];
235 pressure = tdata[7];
236 state = tdata[3] & 0xC0;
237 down = state == 0x80;
238 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
239 id = (tdata[7] << 2 | tdata[6] >> 6) & 0xf;
240 x = (tdata[1] << 27 | tdata[0] << 19) >> 19;
241 y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19);
242 size = tdata[6] & 0x3f;
243 orientation = (tdata[7] >> 2) - 32;
244 touch_major = tdata[4];
245 touch_minor = tdata[5];
246 state = tdata[8] & TOUCH_STATE_MASK;
247 down = state != TOUCH_STATE_NONE;
248 }
249
250 /* Store tracking ID and other fields. */
251 msc->tracking_ids[raw_id] = id;
252 msc->touches[id].x = x;
253 msc->touches[id].y = y;
254 msc->touches[id].size = size;
255
256 /* If requested, emulate a scroll wheel by detecting small
257 * vertical touch motions.
258 */
259 if (emulate_scroll_wheel && (input->id.product !=
260 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2)) {
261 unsigned long now = jiffies;
262 int step_x = msc->touches[id].scroll_x - x;
263 int step_y = msc->touches[id].scroll_y - y;
264 int step_hr =
265 max_t(int,
266 ((64 - (int)scroll_speed) * msc->scroll_accel) /
267 SCROLL_HR_STEPS,
268 1);
269 int step_x_hr = msc->touches[id].scroll_x_hr - x;
270 int step_y_hr = msc->touches[id].scroll_y_hr - y;
271
272 /* Calculate and apply the scroll motion. */
273 switch (state) {
274 case TOUCH_STATE_START:
275 msc->touches[id].scroll_x = x;
276 msc->touches[id].scroll_y = y;
277 msc->touches[id].scroll_x_hr = x;
278 msc->touches[id].scroll_y_hr = y;
279 msc->touches[id].scroll_x_active = false;
280 msc->touches[id].scroll_y_active = false;
281
282 /* Reset acceleration after half a second. */
283 if (scroll_acceleration && time_before(now,
284 msc->scroll_jiffies + HZ / 2))
285 msc->scroll_accel = max_t(int,
286 msc->scroll_accel - 1, 1);
287 else
288 msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
289
290 break;
291 case TOUCH_STATE_DRAG:
292 step_x /= (64 - (int)scroll_speed) * msc->scroll_accel;
293 if (step_x != 0) {
294 msc->touches[id].scroll_x -= step_x *
295 (64 - scroll_speed) * msc->scroll_accel;
296 msc->scroll_jiffies = now;
297 input_report_rel(input, REL_HWHEEL, -step_x);
298 }
299
300 step_y /= (64 - (int)scroll_speed) * msc->scroll_accel;
301 if (step_y != 0) {
302 msc->touches[id].scroll_y -= step_y *
303 (64 - scroll_speed) * msc->scroll_accel;
304 msc->scroll_jiffies = now;
305 input_report_rel(input, REL_WHEEL, step_y);
306 }
307
308 if (!msc->touches[id].scroll_x_active &&
309 abs(step_x_hr) > SCROLL_HR_THRESHOLD) {
310 msc->touches[id].scroll_x_active = true;
311 msc->touches[id].scroll_x_hr = x;
312 step_x_hr = 0;
313 }
314
315 step_x_hr /= step_hr;
316 if (step_x_hr != 0 &&
317 msc->touches[id].scroll_x_active) {
318 msc->touches[id].scroll_x_hr -= step_x_hr *
319 step_hr;
320 input_report_rel(input,
321 REL_HWHEEL_HI_RES,
322 -step_x_hr * SCROLL_HR_MULT);
323 }
324
325 if (!msc->touches[id].scroll_y_active &&
326 abs(step_y_hr) > SCROLL_HR_THRESHOLD) {
327 msc->touches[id].scroll_y_active = true;
328 msc->touches[id].scroll_y_hr = y;
329 step_y_hr = 0;
330 }
331
332 step_y_hr /= step_hr;
333 if (step_y_hr != 0 &&
334 msc->touches[id].scroll_y_active) {
335 msc->touches[id].scroll_y_hr -= step_y_hr *
336 step_hr;
337 input_report_rel(input,
338 REL_WHEEL_HI_RES,
339 step_y_hr * SCROLL_HR_MULT);
340 }
341 break;
342 }
343 }
344
345 if (down)
346 msc->ntouches++;
347
348 input_mt_slot(input, id);
349 input_mt_report_slot_state(input, MT_TOOL_FINGER, down);
350
351 /* Generate the input events for this touch. */
352 if (down) {
353 input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major << 2);
354 input_report_abs(input, ABS_MT_TOUCH_MINOR, touch_minor << 2);
355 input_report_abs(input, ABS_MT_ORIENTATION, -orientation);
356 input_report_abs(input, ABS_MT_POSITION_X, x);
357 input_report_abs(input, ABS_MT_POSITION_Y, y);
358
359 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2)
360 input_report_abs(input, ABS_MT_PRESSURE, pressure);
361
362 if (report_undeciphered) {
363 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
364 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2)
365 input_event(input, EV_MSC, MSC_RAW, tdata[7]);
366 else if (input->id.product !=
367 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2)
368 input_event(input, EV_MSC, MSC_RAW, tdata[8]);
369 }
370 }
371}
372
373static int magicmouse_raw_event(struct hid_device *hdev,
374 struct hid_report *report, u8 *data, int size)
375{
376 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
377 struct input_dev *input = msc->input;
378 int x = 0, y = 0, ii, clicks = 0, npoints;
379
380 switch (data[0]) {
381 case TRACKPAD_REPORT_ID:
382 case TRACKPAD2_BT_REPORT_ID:
383 /* Expect four bytes of prefix, and N*9 bytes of touch data. */
384 if (size < 4 || ((size - 4) % 9) != 0)
385 return 0;
386 npoints = (size - 4) / 9;
387 if (npoints > 15) {
388 hid_warn(hdev, "invalid size value (%d) for TRACKPAD_REPORT_ID\n",
389 size);
390 return 0;
391 }
392 msc->ntouches = 0;
393 for (ii = 0; ii < npoints; ii++)
394 magicmouse_emit_touch(msc, ii, data + ii * 9 + 4);
395
396 clicks = data[1];
397
398 /* The following bits provide a device specific timestamp. They
399 * are unused here.
400 *
401 * ts = data[1] >> 6 | data[2] << 2 | data[3] << 10;
402 */
403 break;
404 case TRACKPAD2_USB_REPORT_ID:
405 /* Expect twelve bytes of prefix and N*9 bytes of touch data. */
406 if (size < 12 || ((size - 12) % 9) != 0)
407 return 0;
408 npoints = (size - 12) / 9;
409 if (npoints > 15) {
410 hid_warn(hdev, "invalid size value (%d) for TRACKPAD2_USB_REPORT_ID\n",
411 size);
412 return 0;
413 }
414 msc->ntouches = 0;
415 for (ii = 0; ii < npoints; ii++)
416 magicmouse_emit_touch(msc, ii, data + ii * 9 + 12);
417
418 clicks = data[1];
419 break;
420 case MOUSE_REPORT_ID:
421 /* Expect six bytes of prefix, and N*8 bytes of touch data. */
422 if (size < 6 || ((size - 6) % 8) != 0)
423 return 0;
424 npoints = (size - 6) / 8;
425 if (npoints > 15) {
426 hid_warn(hdev, "invalid size value (%d) for MOUSE_REPORT_ID\n",
427 size);
428 return 0;
429 }
430 msc->ntouches = 0;
431 for (ii = 0; ii < npoints; ii++)
432 magicmouse_emit_touch(msc, ii, data + ii * 8 + 6);
433
434 /* When emulating three-button mode, it is important
435 * to have the current touch information before
436 * generating a click event.
437 */
438 x = (int)(((data[3] & 0x0c) << 28) | (data[1] << 22)) >> 22;
439 y = (int)(((data[3] & 0x30) << 26) | (data[2] << 22)) >> 22;
440 clicks = data[3];
441
442 /* The following bits provide a device specific timestamp. They
443 * are unused here.
444 *
445 * ts = data[3] >> 6 | data[4] << 2 | data[5] << 10;
446 */
447 break;
448 case MOUSE2_REPORT_ID:
449 /* Size is either 8 or (14 + 8 * N) */
450 if (size != 8 && (size < 14 || (size - 14) % 8 != 0))
451 return 0;
452 npoints = (size - 14) / 8;
453 if (npoints > 15) {
454 hid_warn(hdev, "invalid size value (%d) for MOUSE2_REPORT_ID\n",
455 size);
456 return 0;
457 }
458 msc->ntouches = 0;
459 for (ii = 0; ii < npoints; ii++)
460 magicmouse_emit_touch(msc, ii, data + ii * 8 + 14);
461
462 /* When emulating three-button mode, it is important
463 * to have the current touch information before
464 * generating a click event.
465 */
466 x = (int)((data[3] << 24) | (data[2] << 16)) >> 16;
467 y = (int)((data[5] << 24) | (data[4] << 16)) >> 16;
468 clicks = data[1];
469
470 /* The following bits provide a device specific timestamp. They
471 * are unused here.
472 *
473 * ts = data[11] >> 6 | data[12] << 2 | data[13] << 10;
474 */
475 break;
476 case DOUBLE_REPORT_ID:
477 /* Sometimes the trackpad sends two touch reports in one
478 * packet.
479 */
480 magicmouse_raw_event(hdev, report, data + 2, data[1]);
481 magicmouse_raw_event(hdev, report, data + 2 + data[1],
482 size - 2 - data[1]);
483 return 0;
484 default:
485 return 0;
486 }
487
488 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
489 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
490 magicmouse_emit_buttons(msc, clicks & 3);
491 input_report_rel(input, REL_X, x);
492 input_report_rel(input, REL_Y, y);
493 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
494 input_mt_sync_frame(input);
495 input_report_key(input, BTN_MOUSE, clicks & 1);
496 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
497 input_report_key(input, BTN_MOUSE, clicks & 1);
498 input_mt_report_pointer_emulation(input, true);
499 }
500
501 input_sync(input);
502 return 1;
503}
504
505static int magicmouse_event(struct hid_device *hdev, struct hid_field *field,
506 struct hid_usage *usage, __s32 value)
507{
508 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
509 if (msc->input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 &&
510 field->report->id == MOUSE2_REPORT_ID) {
511 /*
512 * magic_mouse_raw_event has done all the work. Skip hidinput.
513 *
514 * Specifically, hidinput may modify BTN_LEFT and BTN_RIGHT,
515 * breaking emulate_3button.
516 */
517 return 1;
518 }
519 return 0;
520}
521
522static int magicmouse_setup_input(struct input_dev *input, struct hid_device *hdev)
523{
524 int error;
525 int mt_flags = 0;
526
527 __set_bit(EV_KEY, input->evbit);
528
529 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
530 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
531 __set_bit(BTN_LEFT, input->keybit);
532 __set_bit(BTN_RIGHT, input->keybit);
533 if (emulate_3button)
534 __set_bit(BTN_MIDDLE, input->keybit);
535
536 __set_bit(EV_REL, input->evbit);
537 __set_bit(REL_X, input->relbit);
538 __set_bit(REL_Y, input->relbit);
539 if (emulate_scroll_wheel) {
540 __set_bit(REL_WHEEL, input->relbit);
541 __set_bit(REL_HWHEEL, input->relbit);
542 __set_bit(REL_WHEEL_HI_RES, input->relbit);
543 __set_bit(REL_HWHEEL_HI_RES, input->relbit);
544 }
545 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
546 /* If the trackpad has been connected to a Mac, the name is
547 * automatically personalized, e.g., "José Expósito's Trackpad".
548 * When connected through Bluetooth, the personalized name is
549 * reported, however, when connected through USB the generic
550 * name is reported.
551 * Set the device name to ensure the same driver settings get
552 * loaded, whether connected through bluetooth or USB.
553 */
554 if (hdev->vendor == BT_VENDOR_ID_APPLE) {
555 if (input->id.version == TRACKPAD2_2021_BT_VERSION)
556 input->name = "Apple Inc. Magic Trackpad";
557 else
558 input->name = "Apple Inc. Magic Trackpad 2";
559 } else { /* USB_VENDOR_ID_APPLE */
560 input->name = hdev->name;
561 }
562
563 __clear_bit(EV_MSC, input->evbit);
564 __clear_bit(BTN_0, input->keybit);
565 __clear_bit(BTN_RIGHT, input->keybit);
566 __clear_bit(BTN_MIDDLE, input->keybit);
567 __set_bit(BTN_MOUSE, input->keybit);
568 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
569 __set_bit(BTN_TOOL_FINGER, input->keybit);
570
571 mt_flags = INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
572 INPUT_MT_TRACK;
573 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
574 /* input->keybit is initialized with incorrect button info
575 * for Magic Trackpad. There really is only one physical
576 * button (BTN_LEFT == BTN_MOUSE). Make sure we don't
577 * advertise buttons that don't exist...
578 */
579 __clear_bit(BTN_RIGHT, input->keybit);
580 __clear_bit(BTN_MIDDLE, input->keybit);
581 __set_bit(BTN_MOUSE, input->keybit);
582 __set_bit(BTN_TOOL_FINGER, input->keybit);
583 __set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
584 __set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
585 __set_bit(BTN_TOOL_QUADTAP, input->keybit);
586 __set_bit(BTN_TOOL_QUINTTAP, input->keybit);
587 __set_bit(BTN_TOUCH, input->keybit);
588 __set_bit(INPUT_PROP_POINTER, input->propbit);
589 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
590 }
591
592
593 __set_bit(EV_ABS, input->evbit);
594
595 error = input_mt_init_slots(input, 16, mt_flags);
596 if (error)
597 return error;
598 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255 << 2,
599 4, 0);
600 input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255 << 2,
601 4, 0);
602
603 /* Note: Touch Y position from the device is inverted relative
604 * to how pointer motion is reported (and relative to how USB
605 * HID recommends the coordinates work). This driver keeps
606 * the origin at the same position, and just uses the additive
607 * inverse of the reported Y.
608 */
609 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE ||
610 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
611 input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0);
612 input_set_abs_params(input, ABS_MT_POSITION_X,
613 MOUSE_MIN_X, MOUSE_MAX_X, 4, 0);
614 input_set_abs_params(input, ABS_MT_POSITION_Y,
615 MOUSE_MIN_Y, MOUSE_MAX_Y, 4, 0);
616
617 input_abs_set_res(input, ABS_MT_POSITION_X,
618 MOUSE_RES_X);
619 input_abs_set_res(input, ABS_MT_POSITION_Y,
620 MOUSE_RES_Y);
621 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
622 input_set_abs_params(input, ABS_MT_PRESSURE, 0, 253, 0, 0);
623 input_set_abs_params(input, ABS_PRESSURE, 0, 253, 0, 0);
624 input_set_abs_params(input, ABS_MT_ORIENTATION, -3, 4, 0, 0);
625 input_set_abs_params(input, ABS_X, TRACKPAD2_MIN_X,
626 TRACKPAD2_MAX_X, 0, 0);
627 input_set_abs_params(input, ABS_Y, TRACKPAD2_MIN_Y,
628 TRACKPAD2_MAX_Y, 0, 0);
629 input_set_abs_params(input, ABS_MT_POSITION_X,
630 TRACKPAD2_MIN_X, TRACKPAD2_MAX_X, 0, 0);
631 input_set_abs_params(input, ABS_MT_POSITION_Y,
632 TRACKPAD2_MIN_Y, TRACKPAD2_MAX_Y, 0, 0);
633
634 input_abs_set_res(input, ABS_X, TRACKPAD2_RES_X);
635 input_abs_set_res(input, ABS_Y, TRACKPAD2_RES_Y);
636 input_abs_set_res(input, ABS_MT_POSITION_X, TRACKPAD2_RES_X);
637 input_abs_set_res(input, ABS_MT_POSITION_Y, TRACKPAD2_RES_Y);
638 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
639 input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0);
640 input_set_abs_params(input, ABS_X, TRACKPAD_MIN_X,
641 TRACKPAD_MAX_X, 4, 0);
642 input_set_abs_params(input, ABS_Y, TRACKPAD_MIN_Y,
643 TRACKPAD_MAX_Y, 4, 0);
644 input_set_abs_params(input, ABS_MT_POSITION_X,
645 TRACKPAD_MIN_X, TRACKPAD_MAX_X, 4, 0);
646 input_set_abs_params(input, ABS_MT_POSITION_Y,
647 TRACKPAD_MIN_Y, TRACKPAD_MAX_Y, 4, 0);
648
649 input_abs_set_res(input, ABS_X, TRACKPAD_RES_X);
650 input_abs_set_res(input, ABS_Y, TRACKPAD_RES_Y);
651 input_abs_set_res(input, ABS_MT_POSITION_X,
652 TRACKPAD_RES_X);
653 input_abs_set_res(input, ABS_MT_POSITION_Y,
654 TRACKPAD_RES_Y);
655 }
656
657 input_set_events_per_packet(input, 60);
658
659 if (report_undeciphered &&
660 input->id.product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
661 __set_bit(EV_MSC, input->evbit);
662 __set_bit(MSC_RAW, input->mscbit);
663 }
664
665 /*
666 * hid-input may mark device as using autorepeat, but neither
667 * the trackpad, nor the mouse actually want it.
668 */
669 __clear_bit(EV_REP, input->evbit);
670
671 return 0;
672}
673
674static int magicmouse_input_mapping(struct hid_device *hdev,
675 struct hid_input *hi, struct hid_field *field,
676 struct hid_usage *usage, unsigned long **bit, int *max)
677{
678 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
679
680 if (!msc->input)
681 msc->input = hi->input;
682
683 /* Magic Trackpad does not give relative data after switching to MT */
684 if ((hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD ||
685 hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) &&
686 field->flags & HID_MAIN_ITEM_RELATIVE)
687 return -1;
688
689 return 0;
690}
691
692static int magicmouse_input_configured(struct hid_device *hdev,
693 struct hid_input *hi)
694
695{
696 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
697 int ret;
698
699 ret = magicmouse_setup_input(msc->input, hdev);
700 if (ret) {
701 hid_err(hdev, "magicmouse setup input failed (%d)\n", ret);
702 /* clean msc->input to notify probe() of the failure */
703 msc->input = NULL;
704 return ret;
705 }
706
707 return 0;
708}
709
710static int magicmouse_enable_multitouch(struct hid_device *hdev)
711{
712 const u8 *feature;
713 const u8 feature_mt[] = { 0xD7, 0x01 };
714 const u8 feature_mt_mouse2[] = { 0xF1, 0x02, 0x01 };
715 const u8 feature_mt_trackpad2_usb[] = { 0x02, 0x01 };
716 const u8 feature_mt_trackpad2_bt[] = { 0xF1, 0x02, 0x01 };
717 u8 *buf;
718 int ret;
719 int feature_size;
720
721 if (hdev->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
722 if (hdev->vendor == BT_VENDOR_ID_APPLE) {
723 feature_size = sizeof(feature_mt_trackpad2_bt);
724 feature = feature_mt_trackpad2_bt;
725 } else { /* USB_VENDOR_ID_APPLE */
726 feature_size = sizeof(feature_mt_trackpad2_usb);
727 feature = feature_mt_trackpad2_usb;
728 }
729 } else if (hdev->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
730 feature_size = sizeof(feature_mt_mouse2);
731 feature = feature_mt_mouse2;
732 } else {
733 feature_size = sizeof(feature_mt);
734 feature = feature_mt;
735 }
736
737 buf = kmemdup(feature, feature_size, GFP_KERNEL);
738 if (!buf)
739 return -ENOMEM;
740
741 ret = hid_hw_raw_request(hdev, buf[0], buf, feature_size,
742 HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
743 kfree(buf);
744 return ret;
745}
746
747static void magicmouse_enable_mt_work(struct work_struct *work)
748{
749 struct magicmouse_sc *msc =
750 container_of(work, struct magicmouse_sc, work.work);
751 int ret;
752
753 ret = magicmouse_enable_multitouch(msc->hdev);
754 if (ret < 0)
755 hid_err(msc->hdev, "unable to request touch data (%d)\n", ret);
756}
757
758static int magicmouse_fetch_battery(struct hid_device *hdev)
759{
760#ifdef CONFIG_HID_BATTERY_STRENGTH
761 struct hid_report_enum *report_enum;
762 struct hid_report *report;
763
764 if (!hdev->battery || hdev->vendor != USB_VENDOR_ID_APPLE ||
765 (hdev->product != USB_DEVICE_ID_APPLE_MAGICMOUSE2 &&
766 hdev->product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2))
767 return -1;
768
769 report_enum = &hdev->report_enum[hdev->battery_report_type];
770 report = report_enum->report_id_hash[hdev->battery_report_id];
771
772 if (!report || report->maxfield < 1)
773 return -1;
774
775 if (hdev->battery_capacity == hdev->battery_max)
776 return -1;
777
778 hid_hw_request(hdev, report, HID_REQ_GET_REPORT);
779 return 0;
780#else
781 return -1;
782#endif
783}
784
785static void magicmouse_battery_timer_tick(struct timer_list *t)
786{
787 struct magicmouse_sc *msc = from_timer(msc, t, battery_timer);
788 struct hid_device *hdev = msc->hdev;
789
790 if (magicmouse_fetch_battery(hdev) == 0) {
791 mod_timer(&msc->battery_timer,
792 jiffies + msecs_to_jiffies(USB_BATTERY_TIMEOUT_MS));
793 }
794}
795
796static int magicmouse_probe(struct hid_device *hdev,
797 const struct hid_device_id *id)
798{
799 struct magicmouse_sc *msc;
800 struct hid_report *report;
801 int ret;
802
803 msc = devm_kzalloc(&hdev->dev, sizeof(*msc), GFP_KERNEL);
804 if (msc == NULL) {
805 hid_err(hdev, "can't alloc magicmouse descriptor\n");
806 return -ENOMEM;
807 }
808
809 msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
810 msc->hdev = hdev;
811 INIT_DEFERRABLE_WORK(&msc->work, magicmouse_enable_mt_work);
812
813 msc->quirks = id->driver_data;
814 hid_set_drvdata(hdev, msc);
815
816 ret = hid_parse(hdev);
817 if (ret) {
818 hid_err(hdev, "magicmouse hid parse failed\n");
819 return ret;
820 }
821
822 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
823 if (ret) {
824 hid_err(hdev, "magicmouse hw start failed\n");
825 return ret;
826 }
827
828 timer_setup(&msc->battery_timer, magicmouse_battery_timer_tick, 0);
829 mod_timer(&msc->battery_timer,
830 jiffies + msecs_to_jiffies(USB_BATTERY_TIMEOUT_MS));
831 magicmouse_fetch_battery(hdev);
832
833 if (id->vendor == USB_VENDOR_ID_APPLE &&
834 (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
835 (id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 && hdev->type != HID_TYPE_USBMOUSE)))
836 return 0;
837
838 if (!msc->input) {
839 hid_err(hdev, "magicmouse input not registered\n");
840 ret = -ENOMEM;
841 goto err_stop_hw;
842 }
843
844 if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE)
845 report = hid_register_report(hdev, HID_INPUT_REPORT,
846 MOUSE_REPORT_ID, 0);
847 else if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2)
848 report = hid_register_report(hdev, HID_INPUT_REPORT,
849 MOUSE2_REPORT_ID, 0);
850 else if (id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
851 if (id->vendor == BT_VENDOR_ID_APPLE)
852 report = hid_register_report(hdev, HID_INPUT_REPORT,
853 TRACKPAD2_BT_REPORT_ID, 0);
854 else /* USB_VENDOR_ID_APPLE */
855 report = hid_register_report(hdev, HID_INPUT_REPORT,
856 TRACKPAD2_USB_REPORT_ID, 0);
857 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
858 report = hid_register_report(hdev, HID_INPUT_REPORT,
859 TRACKPAD_REPORT_ID, 0);
860 report = hid_register_report(hdev, HID_INPUT_REPORT,
861 DOUBLE_REPORT_ID, 0);
862 }
863
864 if (!report) {
865 hid_err(hdev, "unable to register touch report\n");
866 ret = -ENOMEM;
867 goto err_stop_hw;
868 }
869 report->size = 6;
870
871 /*
872 * Some devices repond with 'invalid report id' when feature
873 * report switching it into multitouch mode is sent to it.
874 *
875 * This results in -EIO from the _raw low-level transport callback,
876 * but there seems to be no other way of switching the mode.
877 * Thus the super-ugly hacky success check below.
878 */
879 ret = magicmouse_enable_multitouch(hdev);
880 if (ret != -EIO && ret < 0) {
881 hid_err(hdev, "unable to request touch data (%d)\n", ret);
882 goto err_stop_hw;
883 }
884 if (ret == -EIO && id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2) {
885 schedule_delayed_work(&msc->work, msecs_to_jiffies(500));
886 }
887
888 return 0;
889err_stop_hw:
890 del_timer_sync(&msc->battery_timer);
891 hid_hw_stop(hdev);
892 return ret;
893}
894
895static void magicmouse_remove(struct hid_device *hdev)
896{
897 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
898
899 if (msc) {
900 cancel_delayed_work_sync(&msc->work);
901 del_timer_sync(&msc->battery_timer);
902 }
903
904 hid_hw_stop(hdev);
905}
906
907static __u8 *magicmouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
908 unsigned int *rsize)
909{
910 /*
911 * Change the usage from:
912 * 0x06, 0x00, 0xff, // Usage Page (Vendor Defined Page 1) 0
913 * 0x09, 0x0b, // Usage (Vendor Usage 0x0b) 3
914 * To:
915 * 0x05, 0x01, // Usage Page (Generic Desktop) 0
916 * 0x09, 0x02, // Usage (Mouse) 2
917 */
918 if (hdev->vendor == USB_VENDOR_ID_APPLE &&
919 (hdev->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 ||
920 hdev->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) &&
921 *rsize == 83 && rdesc[46] == 0x84 && rdesc[58] == 0x85) {
922 hid_info(hdev,
923 "fixing up magicmouse battery report descriptor\n");
924 *rsize = *rsize - 1;
925 rdesc = kmemdup(rdesc + 1, *rsize, GFP_KERNEL);
926 if (!rdesc)
927 return NULL;
928
929 rdesc[0] = 0x05;
930 rdesc[1] = 0x01;
931 rdesc[2] = 0x09;
932 rdesc[3] = 0x02;
933 }
934
935 return rdesc;
936}
937
938static const struct hid_device_id magic_mice[] = {
939 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
940 USB_DEVICE_ID_APPLE_MAGICMOUSE), .driver_data = 0 },
941 { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE,
942 USB_DEVICE_ID_APPLE_MAGICMOUSE2), .driver_data = 0 },
943 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
944 USB_DEVICE_ID_APPLE_MAGICMOUSE2), .driver_data = 0 },
945 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
946 USB_DEVICE_ID_APPLE_MAGICTRACKPAD), .driver_data = 0 },
947 { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE,
948 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2), .driver_data = 0 },
949 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
950 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2), .driver_data = 0 },
951 { }
952};
953MODULE_DEVICE_TABLE(hid, magic_mice);
954
955static struct hid_driver magicmouse_driver = {
956 .name = "magicmouse",
957 .id_table = magic_mice,
958 .probe = magicmouse_probe,
959 .remove = magicmouse_remove,
960 .report_fixup = magicmouse_report_fixup,
961 .raw_event = magicmouse_raw_event,
962 .event = magicmouse_event,
963 .input_mapping = magicmouse_input_mapping,
964 .input_configured = magicmouse_input_configured,
965};
966module_hid_driver(magicmouse_driver);
967
968MODULE_LICENSE("GPL");