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
23 static bool emulate_3button = true;
24 module_param(emulate_3button, bool, 0644);
25 MODULE_PARM_DESC(emulate_3button, "Emulate a middle button");
26
27 static int middle_button_start = -350;
28 static int middle_button_stop = +350;
29
30 static bool emulate_scroll_wheel = true;
31 module_param(emulate_scroll_wheel, bool, 0644);
32 MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel");
33
34 static unsigned int scroll_speed = 32;
param_set_scroll_speed(const char * val,const struct kernel_param * kp)35 static 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 }
43 module_param_call(scroll_speed, param_set_scroll_speed, param_get_uint, &scroll_speed, 0644);
44 MODULE_PARM_DESC(scroll_speed, "Scroll speed, value from 0 (slow) to 63 (fast)");
45
46 static bool scroll_acceleration = false;
47 module_param(scroll_acceleration, bool, 0644);
48 MODULE_PARM_DESC(scroll_acceleration, "Accelerate sequential scroll events");
49
50 static bool report_undeciphered;
51 module_param(report_undeciphered, bool, 0644);
52 MODULE_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 */
124 struct 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
magicmouse_firm_touch(struct magicmouse_sc * msc)150 static 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
magicmouse_emit_buttons(struct magicmouse_sc * msc,int state)173 static 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
magicmouse_emit_touch(struct magicmouse_sc * msc,int raw_id,u8 * tdata)210 static 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
magicmouse_raw_event(struct hid_device * hdev,struct hid_report * report,u8 * data,int size)373 static 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
magicmouse_event(struct hid_device * hdev,struct hid_field * field,struct hid_usage * usage,__s32 value)505 static 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
magicmouse_setup_input(struct input_dev * input,struct hid_device * hdev)522 static 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
magicmouse_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)674 static 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
magicmouse_input_configured(struct hid_device * hdev,struct hid_input * hi)692 static 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
magicmouse_enable_multitouch(struct hid_device * hdev)710 static 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
magicmouse_enable_mt_work(struct work_struct * work)747 static 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
magicmouse_fetch_battery(struct hid_device * hdev)758 static 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
magicmouse_battery_timer_tick(struct timer_list * t)785 static 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
magicmouse_probe(struct hid_device * hdev,const struct hid_device_id * id)796 static 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;
889 err_stop_hw:
890 del_timer_sync(&msc->battery_timer);
891 hid_hw_stop(hdev);
892 return ret;
893 }
894
magicmouse_remove(struct hid_device * hdev)895 static 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
magicmouse_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * rsize)907 static __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
938 static 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 };
953 MODULE_DEVICE_TABLE(hid, magic_mice);
954
955 static 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 };
966 module_hid_driver(magicmouse_driver);
967
968 MODULE_LICENSE("GPL");
969
