Root/
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/module.h> |
20 | #include <linux/slab.h> |
21 | #include <linux/usb.h> |
22 | |
23 | #include "hid-ids.h" |
24 | |
25 | static bool emulate_3button = true; |
26 | module_param(emulate_3button, bool, 0644); |
27 | MODULE_PARM_DESC(emulate_3button, "Emulate a middle button"); |
28 | |
29 | static int middle_button_start = -350; |
30 | static int middle_button_stop = +350; |
31 | |
32 | static bool emulate_scroll_wheel = true; |
33 | module_param(emulate_scroll_wheel, bool, 0644); |
34 | MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel"); |
35 | |
36 | static unsigned int scroll_speed = 32; |
37 | static int param_set_scroll_speed(const char *val, struct kernel_param *kp) { |
38 | unsigned long speed; |
39 | if (!val || strict_strtoul(val, 0, &speed) || speed > 63) |
40 | return -EINVAL; |
41 | scroll_speed = speed; |
42 | return 0; |
43 | } |
44 | module_param_call(scroll_speed, param_set_scroll_speed, param_get_uint, &scroll_speed, 0644); |
45 | MODULE_PARM_DESC(scroll_speed, "Scroll speed, value from 0 (slow) to 63 (fast)"); |
46 | |
47 | static bool scroll_acceleration = false; |
48 | module_param(scroll_acceleration, bool, 0644); |
49 | MODULE_PARM_DESC(scroll_acceleration, "Accelerate sequential scroll events"); |
50 | |
51 | static bool report_touches = true; |
52 | module_param(report_touches, bool, 0644); |
53 | MODULE_PARM_DESC(report_touches, "Emit touch records (otherwise, only use them for emulation)"); |
54 | |
55 | static bool report_undeciphered; |
56 | module_param(report_undeciphered, bool, 0644); |
57 | MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event"); |
58 | |
59 | #define TRACKPAD_REPORT_ID 0x28 |
60 | #define MOUSE_REPORT_ID 0x29 |
61 | #define DOUBLE_REPORT_ID 0xf7 |
62 | /* These definitions are not precise, but they're close enough. (Bits |
63 | * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem |
64 | * to be some kind of bit mask -- 0x20 may be a near-field reading, |
65 | * and 0x40 is actual contact, and 0x10 may be a start/stop or change |
66 | * indication.) |
67 | */ |
68 | #define TOUCH_STATE_MASK 0xf0 |
69 | #define TOUCH_STATE_NONE 0x00 |
70 | #define TOUCH_STATE_START 0x30 |
71 | #define TOUCH_STATE_DRAG 0x40 |
72 | |
73 | #define SCROLL_ACCEL_DEFAULT 7 |
74 | |
75 | /* Single touch emulation should only begin when no touches are currently down. |
76 | * This is true when single_touch_id is equal to NO_TOUCHES. If multiple touches |
77 | * are down and the touch providing for single touch emulation is lifted, |
78 | * single_touch_id is equal to SINGLE_TOUCH_UP. While single touch emulation is |
79 | * occurring, single_touch_id corresponds with the tracking id of the touch used. |
80 | */ |
81 | #define NO_TOUCHES -1 |
82 | #define SINGLE_TOUCH_UP -2 |
83 | |
84 | /* Touch surface information. Dimension is in hundredths of a mm, min and max |
85 | * are in units. */ |
86 | #define MOUSE_DIMENSION_X (float)9056 |
87 | #define MOUSE_MIN_X -1100 |
88 | #define MOUSE_MAX_X 1258 |
89 | #define MOUSE_RES_X ((MOUSE_MAX_X - MOUSE_MIN_X) / (MOUSE_DIMENSION_X / 100)) |
90 | #define MOUSE_DIMENSION_Y (float)5152 |
91 | #define MOUSE_MIN_Y -1589 |
92 | #define MOUSE_MAX_Y 2047 |
93 | #define MOUSE_RES_Y ((MOUSE_MAX_Y - MOUSE_MIN_Y) / (MOUSE_DIMENSION_Y / 100)) |
94 | |
95 | #define TRACKPAD_DIMENSION_X (float)13000 |
96 | #define TRACKPAD_MIN_X -2909 |
97 | #define TRACKPAD_MAX_X 3167 |
98 | #define TRACKPAD_RES_X \ |
99 | ((TRACKPAD_MAX_X - TRACKPAD_MIN_X) / (TRACKPAD_DIMENSION_X / 100)) |
100 | #define TRACKPAD_DIMENSION_Y (float)11000 |
101 | #define TRACKPAD_MIN_Y -2456 |
102 | #define TRACKPAD_MAX_Y 2565 |
103 | #define TRACKPAD_RES_Y \ |
104 | ((TRACKPAD_MAX_Y - TRACKPAD_MIN_Y) / (TRACKPAD_DIMENSION_Y / 100)) |
105 | |
106 | /** |
107 | * struct magicmouse_sc - Tracks Magic Mouse-specific data. |
108 | * @input: Input device through which we report events. |
109 | * @quirks: Currently unused. |
110 | * @ntouches: Number of touches in most recent touch report. |
111 | * @scroll_accel: Number of consecutive scroll motions. |
112 | * @scroll_jiffies: Time of last scroll motion. |
113 | * @touches: Most recent data for a touch, indexed by tracking ID. |
114 | * @tracking_ids: Mapping of current touch input data to @touches. |
115 | */ |
116 | struct magicmouse_sc { |
117 | struct input_dev *input; |
118 | unsigned long quirks; |
119 | |
120 | int ntouches; |
121 | int scroll_accel; |
122 | unsigned long scroll_jiffies; |
123 | |
124 | struct { |
125 | short x; |
126 | short y; |
127 | short scroll_x; |
128 | short scroll_y; |
129 | u8 size; |
130 | } touches[16]; |
131 | int tracking_ids[16]; |
132 | int single_touch_id; |
133 | }; |
134 | |
135 | static int magicmouse_firm_touch(struct magicmouse_sc *msc) |
136 | { |
137 | int touch = -1; |
138 | int ii; |
139 | |
140 | /* If there is only one "firm" touch, set touch to its |
141 | * tracking ID. |
142 | */ |
143 | for (ii = 0; ii < msc->ntouches; ii++) { |
144 | int idx = msc->tracking_ids[ii]; |
145 | if (msc->touches[idx].size < 8) { |
146 | /* Ignore this touch. */ |
147 | } else if (touch >= 0) { |
148 | touch = -1; |
149 | break; |
150 | } else { |
151 | touch = idx; |
152 | } |
153 | } |
154 | |
155 | return touch; |
156 | } |
157 | |
158 | static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state) |
159 | { |
160 | int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 | |
161 | test_bit(BTN_RIGHT, msc->input->key) << 1 | |
162 | test_bit(BTN_MIDDLE, msc->input->key) << 2; |
163 | |
164 | if (emulate_3button) { |
165 | int id; |
166 | |
167 | /* If some button was pressed before, keep it held |
168 | * down. Otherwise, if there's exactly one firm |
169 | * touch, use that to override the mouse's guess. |
170 | */ |
171 | if (state == 0) { |
172 | /* The button was released. */ |
173 | } else if (last_state != 0) { |
174 | state = last_state; |
175 | } else if ((id = magicmouse_firm_touch(msc)) >= 0) { |
176 | int x = msc->touches[id].x; |
177 | if (x < middle_button_start) |
178 | state = 1; |
179 | else if (x > middle_button_stop) |
180 | state = 2; |
181 | else |
182 | state = 4; |
183 | } /* else: we keep the mouse's guess */ |
184 | |
185 | input_report_key(msc->input, BTN_MIDDLE, state & 4); |
186 | } |
187 | |
188 | input_report_key(msc->input, BTN_LEFT, state & 1); |
189 | input_report_key(msc->input, BTN_RIGHT, state & 2); |
190 | |
191 | if (state != last_state) |
192 | msc->scroll_accel = SCROLL_ACCEL_DEFAULT; |
193 | } |
194 | |
195 | static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata) |
196 | { |
197 | struct input_dev *input = msc->input; |
198 | int id, x, y, size, orientation, touch_major, touch_minor, state, down; |
199 | |
200 | if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) { |
201 | id = (tdata[6] << 2 | tdata[5] >> 6) & 0xf; |
202 | x = (tdata[1] << 28 | tdata[0] << 20) >> 20; |
203 | y = -((tdata[2] << 24 | tdata[1] << 16) >> 20); |
204 | size = tdata[5] & 0x3f; |
205 | orientation = (tdata[6] >> 2) - 32; |
206 | touch_major = tdata[3]; |
207 | touch_minor = tdata[4]; |
208 | state = tdata[7] & TOUCH_STATE_MASK; |
209 | down = state != TOUCH_STATE_NONE; |
210 | } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ |
211 | id = (tdata[7] << 2 | tdata[6] >> 6) & 0xf; |
212 | x = (tdata[1] << 27 | tdata[0] << 19) >> 19; |
213 | y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19); |
214 | size = tdata[6] & 0x3f; |
215 | orientation = (tdata[7] >> 2) - 32; |
216 | touch_major = tdata[4]; |
217 | touch_minor = tdata[5]; |
218 | state = tdata[8] & TOUCH_STATE_MASK; |
219 | down = state != TOUCH_STATE_NONE; |
220 | } |
221 | |
222 | /* Store tracking ID and other fields. */ |
223 | msc->tracking_ids[raw_id] = id; |
224 | msc->touches[id].x = x; |
225 | msc->touches[id].y = y; |
226 | msc->touches[id].size = size; |
227 | |
228 | /* If requested, emulate a scroll wheel by detecting small |
229 | * vertical touch motions. |
230 | */ |
231 | if (emulate_scroll_wheel) { |
232 | unsigned long now = jiffies; |
233 | int step_x = msc->touches[id].scroll_x - x; |
234 | int step_y = msc->touches[id].scroll_y - y; |
235 | |
236 | /* Calculate and apply the scroll motion. */ |
237 | switch (state) { |
238 | case TOUCH_STATE_START: |
239 | msc->touches[id].scroll_x = x; |
240 | msc->touches[id].scroll_y = y; |
241 | |
242 | /* Reset acceleration after half a second. */ |
243 | if (scroll_acceleration && time_before(now, |
244 | msc->scroll_jiffies + HZ / 2)) |
245 | msc->scroll_accel = max_t(int, |
246 | msc->scroll_accel - 1, 1); |
247 | else |
248 | msc->scroll_accel = SCROLL_ACCEL_DEFAULT; |
249 | |
250 | break; |
251 | case TOUCH_STATE_DRAG: |
252 | step_x /= (64 - (int)scroll_speed) * msc->scroll_accel; |
253 | if (step_x != 0) { |
254 | msc->touches[id].scroll_x -= step_x * |
255 | (64 - scroll_speed) * msc->scroll_accel; |
256 | msc->scroll_jiffies = now; |
257 | input_report_rel(input, REL_HWHEEL, -step_x); |
258 | } |
259 | |
260 | step_y /= (64 - (int)scroll_speed) * msc->scroll_accel; |
261 | if (step_y != 0) { |
262 | msc->touches[id].scroll_y -= step_y * |
263 | (64 - scroll_speed) * msc->scroll_accel; |
264 | msc->scroll_jiffies = now; |
265 | input_report_rel(input, REL_WHEEL, step_y); |
266 | } |
267 | break; |
268 | } |
269 | } |
270 | |
271 | if (down) { |
272 | msc->ntouches++; |
273 | if (msc->single_touch_id == NO_TOUCHES) |
274 | msc->single_touch_id = id; |
275 | } else if (msc->single_touch_id == id) |
276 | msc->single_touch_id = SINGLE_TOUCH_UP; |
277 | |
278 | /* Generate the input events for this touch. */ |
279 | if (report_touches && down) { |
280 | input_report_abs(input, ABS_MT_TRACKING_ID, id); |
281 | input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major << 2); |
282 | input_report_abs(input, ABS_MT_TOUCH_MINOR, touch_minor << 2); |
283 | input_report_abs(input, ABS_MT_ORIENTATION, -orientation); |
284 | input_report_abs(input, ABS_MT_POSITION_X, x); |
285 | input_report_abs(input, ABS_MT_POSITION_Y, y); |
286 | |
287 | if (report_undeciphered) { |
288 | if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) |
289 | input_event(input, EV_MSC, MSC_RAW, tdata[7]); |
290 | else /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ |
291 | input_event(input, EV_MSC, MSC_RAW, tdata[8]); |
292 | } |
293 | |
294 | input_mt_sync(input); |
295 | } |
296 | } |
297 | |
298 | static int magicmouse_raw_event(struct hid_device *hdev, |
299 | struct hid_report *report, u8 *data, int size) |
300 | { |
301 | struct magicmouse_sc *msc = hid_get_drvdata(hdev); |
302 | struct input_dev *input = msc->input; |
303 | int x = 0, y = 0, ii, clicks = 0, npoints; |
304 | |
305 | switch (data[0]) { |
306 | case TRACKPAD_REPORT_ID: |
307 | /* Expect four bytes of prefix, and N*9 bytes of touch data. */ |
308 | if (size < 4 || ((size - 4) % 9) != 0) |
309 | return 0; |
310 | npoints = (size - 4) / 9; |
311 | msc->ntouches = 0; |
312 | for (ii = 0; ii < npoints; ii++) |
313 | magicmouse_emit_touch(msc, ii, data + ii * 9 + 4); |
314 | |
315 | /* We don't need an MT sync here because trackpad emits a |
316 | * BTN_TOUCH event in a new frame when all touches are released. |
317 | */ |
318 | if (msc->ntouches == 0) |
319 | msc->single_touch_id = NO_TOUCHES; |
320 | |
321 | clicks = data[1]; |
322 | |
323 | /* The following bits provide a device specific timestamp. They |
324 | * are unused here. |
325 | * |
326 | * ts = data[1] >> 6 | data[2] << 2 | data[3] << 10; |
327 | */ |
328 | break; |
329 | case MOUSE_REPORT_ID: |
330 | /* Expect six bytes of prefix, and N*8 bytes of touch data. */ |
331 | if (size < 6 || ((size - 6) % 8) != 0) |
332 | return 0; |
333 | npoints = (size - 6) / 8; |
334 | msc->ntouches = 0; |
335 | for (ii = 0; ii < npoints; ii++) |
336 | magicmouse_emit_touch(msc, ii, data + ii * 8 + 6); |
337 | |
338 | if (report_touches && msc->ntouches == 0) |
339 | input_mt_sync(input); |
340 | |
341 | /* When emulating three-button mode, it is important |
342 | * to have the current touch information before |
343 | * generating a click event. |
344 | */ |
345 | x = (int)(((data[3] & 0x0c) << 28) | (data[1] << 22)) >> 22; |
346 | y = (int)(((data[3] & 0x30) << 26) | (data[2] << 22)) >> 22; |
347 | clicks = data[3]; |
348 | |
349 | /* The following bits provide a device specific timestamp. They |
350 | * are unused here. |
351 | * |
352 | * ts = data[3] >> 6 | data[4] << 2 | data[5] << 10; |
353 | */ |
354 | break; |
355 | case DOUBLE_REPORT_ID: |
356 | /* Sometimes the trackpad sends two touch reports in one |
357 | * packet. |
358 | */ |
359 | magicmouse_raw_event(hdev, report, data + 2, data[1]); |
360 | magicmouse_raw_event(hdev, report, data + 2 + data[1], |
361 | size - 2 - data[1]); |
362 | break; |
363 | default: |
364 | return 0; |
365 | } |
366 | |
367 | if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) { |
368 | magicmouse_emit_buttons(msc, clicks & 3); |
369 | input_report_rel(input, REL_X, x); |
370 | input_report_rel(input, REL_Y, y); |
371 | } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ |
372 | input_report_key(input, BTN_MOUSE, clicks & 1); |
373 | input_report_key(input, BTN_TOUCH, msc->ntouches > 0); |
374 | input_report_key(input, BTN_TOOL_FINGER, msc->ntouches == 1); |
375 | input_report_key(input, BTN_TOOL_DOUBLETAP, msc->ntouches == 2); |
376 | input_report_key(input, BTN_TOOL_TRIPLETAP, msc->ntouches == 3); |
377 | input_report_key(input, BTN_TOOL_QUADTAP, msc->ntouches == 4); |
378 | if (msc->single_touch_id >= 0) { |
379 | input_report_abs(input, ABS_X, |
380 | msc->touches[msc->single_touch_id].x); |
381 | input_report_abs(input, ABS_Y, |
382 | msc->touches[msc->single_touch_id].y); |
383 | } |
384 | } |
385 | |
386 | input_sync(input); |
387 | return 1; |
388 | } |
389 | |
390 | static void magicmouse_setup_input(struct input_dev *input, struct hid_device *hdev) |
391 | { |
392 | __set_bit(EV_KEY, input->evbit); |
393 | |
394 | if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) { |
395 | __set_bit(BTN_LEFT, input->keybit); |
396 | __set_bit(BTN_RIGHT, input->keybit); |
397 | if (emulate_3button) |
398 | __set_bit(BTN_MIDDLE, input->keybit); |
399 | |
400 | __set_bit(EV_REL, input->evbit); |
401 | __set_bit(REL_X, input->relbit); |
402 | __set_bit(REL_Y, input->relbit); |
403 | if (emulate_scroll_wheel) { |
404 | __set_bit(REL_WHEEL, input->relbit); |
405 | __set_bit(REL_HWHEEL, input->relbit); |
406 | } |
407 | } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ |
408 | /* input->keybit is initialized with incorrect button info |
409 | * for Magic Trackpad. There really is only one physical |
410 | * button (BTN_LEFT == BTN_MOUSE). Make sure we don't |
411 | * advertise buttons that don't exist... |
412 | */ |
413 | __clear_bit(BTN_RIGHT, input->keybit); |
414 | __clear_bit(BTN_MIDDLE, input->keybit); |
415 | __set_bit(BTN_MOUSE, input->keybit); |
416 | __set_bit(BTN_TOOL_FINGER, input->keybit); |
417 | __set_bit(BTN_TOOL_DOUBLETAP, input->keybit); |
418 | __set_bit(BTN_TOOL_TRIPLETAP, input->keybit); |
419 | __set_bit(BTN_TOOL_QUADTAP, input->keybit); |
420 | __set_bit(BTN_TOUCH, input->keybit); |
421 | __set_bit(INPUT_PROP_POINTER, input->propbit); |
422 | __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); |
423 | } |
424 | |
425 | if (report_touches) { |
426 | __set_bit(EV_ABS, input->evbit); |
427 | |
428 | input_set_abs_params(input, ABS_MT_TRACKING_ID, 0, 15, 0, 0); |
429 | input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 4, 0); |
430 | input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 4, 0); |
431 | input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0); |
432 | |
433 | /* Note: Touch Y position from the device is inverted relative |
434 | * to how pointer motion is reported (and relative to how USB |
435 | * HID recommends the coordinates work). This driver keeps |
436 | * the origin at the same position, and just uses the additive |
437 | * inverse of the reported Y. |
438 | */ |
439 | if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) { |
440 | input_set_abs_params(input, ABS_MT_POSITION_X, |
441 | MOUSE_MIN_X, MOUSE_MAX_X, 4, 0); |
442 | input_set_abs_params(input, ABS_MT_POSITION_Y, |
443 | MOUSE_MIN_Y, MOUSE_MAX_Y, 4, 0); |
444 | |
445 | input_abs_set_res(input, ABS_MT_POSITION_X, |
446 | MOUSE_RES_X); |
447 | input_abs_set_res(input, ABS_MT_POSITION_Y, |
448 | MOUSE_RES_Y); |
449 | } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ |
450 | input_set_abs_params(input, ABS_X, TRACKPAD_MIN_X, |
451 | TRACKPAD_MAX_X, 4, 0); |
452 | input_set_abs_params(input, ABS_Y, TRACKPAD_MIN_Y, |
453 | TRACKPAD_MAX_Y, 4, 0); |
454 | input_set_abs_params(input, ABS_MT_POSITION_X, |
455 | TRACKPAD_MIN_X, TRACKPAD_MAX_X, 4, 0); |
456 | input_set_abs_params(input, ABS_MT_POSITION_Y, |
457 | TRACKPAD_MIN_Y, TRACKPAD_MAX_Y, 4, 0); |
458 | |
459 | input_abs_set_res(input, ABS_X, TRACKPAD_RES_X); |
460 | input_abs_set_res(input, ABS_Y, TRACKPAD_RES_Y); |
461 | input_abs_set_res(input, ABS_MT_POSITION_X, |
462 | TRACKPAD_RES_X); |
463 | input_abs_set_res(input, ABS_MT_POSITION_Y, |
464 | TRACKPAD_RES_Y); |
465 | } |
466 | |
467 | input_set_events_per_packet(input, 60); |
468 | } |
469 | |
470 | if (report_undeciphered) { |
471 | __set_bit(EV_MSC, input->evbit); |
472 | __set_bit(MSC_RAW, input->mscbit); |
473 | } |
474 | } |
475 | |
476 | static int magicmouse_input_mapping(struct hid_device *hdev, |
477 | struct hid_input *hi, struct hid_field *field, |
478 | struct hid_usage *usage, unsigned long **bit, int *max) |
479 | { |
480 | struct magicmouse_sc *msc = hid_get_drvdata(hdev); |
481 | |
482 | if (!msc->input) |
483 | msc->input = hi->input; |
484 | |
485 | /* Magic Trackpad does not give relative data after switching to MT */ |
486 | if (hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD && |
487 | field->flags & HID_MAIN_ITEM_RELATIVE) |
488 | return -1; |
489 | |
490 | return 0; |
491 | } |
492 | |
493 | static 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 = kzalloc(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 | msc->single_touch_id = NO_TOUCHES; |
513 | |
514 | ret = hid_parse(hdev); |
515 | if (ret) { |
516 | hid_err(hdev, "magicmouse hid parse failed\n"); |
517 | goto err_free; |
518 | } |
519 | |
520 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
521 | if (ret) { |
522 | hid_err(hdev, "magicmouse hw start failed\n"); |
523 | goto err_free; |
524 | } |
525 | |
526 | /* We do this after hid-input is done parsing reports so that |
527 | * hid-input uses the most natural button and axis IDs. |
528 | */ |
529 | if (msc->input) |
530 | magicmouse_setup_input(msc->input, hdev); |
531 | |
532 | if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE) |
533 | report = hid_register_report(hdev, HID_INPUT_REPORT, |
534 | MOUSE_REPORT_ID); |
535 | else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ |
536 | report = hid_register_report(hdev, HID_INPUT_REPORT, |
537 | TRACKPAD_REPORT_ID); |
538 | report = hid_register_report(hdev, HID_INPUT_REPORT, |
539 | DOUBLE_REPORT_ID); |
540 | } |
541 | |
542 | if (!report) { |
543 | hid_err(hdev, "unable to register touch report\n"); |
544 | ret = -ENOMEM; |
545 | goto err_stop_hw; |
546 | } |
547 | report->size = 6; |
548 | |
549 | /* |
550 | * Some devices repond with 'invalid report id' when feature |
551 | * report switching it into multitouch mode is sent to it. |
552 | * |
553 | * This results in -EIO from the _raw low-level transport callback, |
554 | * but there seems to be no other way of switching the mode. |
555 | * Thus the super-ugly hacky success check below. |
556 | */ |
557 | ret = hdev->hid_output_raw_report(hdev, feature, sizeof(feature), |
558 | HID_FEATURE_REPORT); |
559 | if (ret != -EIO && ret != sizeof(feature)) { |
560 | hid_err(hdev, "unable to request touch data (%d)\n", ret); |
561 | goto err_stop_hw; |
562 | } |
563 | |
564 | return 0; |
565 | err_stop_hw: |
566 | hid_hw_stop(hdev); |
567 | err_free: |
568 | kfree(msc); |
569 | return ret; |
570 | } |
571 | |
572 | static void magicmouse_remove(struct hid_device *hdev) |
573 | { |
574 | struct magicmouse_sc *msc = hid_get_drvdata(hdev); |
575 | |
576 | hid_hw_stop(hdev); |
577 | kfree(msc); |
578 | } |
579 | |
580 | static const struct hid_device_id magic_mice[] = { |
581 | { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, |
582 | USB_DEVICE_ID_APPLE_MAGICMOUSE), .driver_data = 0 }, |
583 | { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, |
584 | USB_DEVICE_ID_APPLE_MAGICTRACKPAD), .driver_data = 0 }, |
585 | { } |
586 | }; |
587 | MODULE_DEVICE_TABLE(hid, magic_mice); |
588 | |
589 | static struct hid_driver magicmouse_driver = { |
590 | .name = "magicmouse", |
591 | .id_table = magic_mice, |
592 | .probe = magicmouse_probe, |
593 | .remove = magicmouse_remove, |
594 | .raw_event = magicmouse_raw_event, |
595 | .input_mapping = magicmouse_input_mapping, |
596 | }; |
597 | |
598 | static int __init magicmouse_init(void) |
599 | { |
600 | int ret; |
601 | |
602 | ret = hid_register_driver(&magicmouse_driver); |
603 | if (ret) |
604 | pr_err("can't register magicmouse driver\n"); |
605 | |
606 | return ret; |
607 | } |
608 | |
609 | static void __exit magicmouse_exit(void) |
610 | { |
611 | hid_unregister_driver(&magicmouse_driver); |
612 | } |
613 | |
614 | module_init(magicmouse_init); |
615 | module_exit(magicmouse_exit); |
616 | MODULE_LICENSE("GPL"); |
617 |
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