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Michael Poole128537c2010-02-06 12:24:36 -05001/*
2 * Apple "Magic" Wireless Mouse driver
3 *
4 * Copyright (c) 2010 Michael Poole <mdpoole@troilus.org>
Chase Douglasa4622302010-08-31 21:56:23 -04005 * Copyright (c) 2010 Chase Douglas <chase.douglas@canonical.com>
Michael Poole128537c2010-02-06 12:24:36 -05006 */
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
Joe Perches4291ee32010-12-09 19:29:03 -080015#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
Michael Poole128537c2010-02-06 12:24:36 -050017#include <linux/device.h>
18#include <linux/hid.h>
Yufeng Shena6d1bc12012-07-04 12:15:43 -040019#include <linux/input/mt.h>
Michael Poole128537c2010-02-06 12:24:36 -050020#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090021#include <linux/slab.h>
Michael Poole128537c2010-02-06 12:24:36 -050022
23#include "hid-ids.h"
24
Michael Poole71b38bd2010-02-11 00:32:57 -050025static bool emulate_3button = true;
Michael Poole128537c2010-02-06 12:24:36 -050026module_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
Michael Poole71b38bd2010-02-11 00:32:57 -050032static bool emulate_scroll_wheel = true;
Michael Poole128537c2010-02-06 12:24:36 -050033module_param(emulate_scroll_wheel, bool, 0644);
34MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel");
35
Chase Douglas0b778e72010-06-20 21:32:30 -040036static unsigned int scroll_speed = 32;
37static int param_set_scroll_speed(const char *val, struct kernel_param *kp) {
38 unsigned long speed;
Jingoo Handfc450b2013-07-19 15:53:16 +090039 if (!val || kstrtoul(val, 0, &speed) || speed > 63)
Chase Douglas0b778e72010-06-20 21:32:30 -040040 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
Chase Douglas9846f352010-06-02 10:28:27 -040047static bool scroll_acceleration = false;
48module_param(scroll_acceleration, bool, 0644);
49MODULE_PARM_DESC(scroll_acceleration, "Accelerate sequential scroll events");
50
Michael Poole71b38bd2010-02-11 00:32:57 -050051static bool report_undeciphered;
Michael Poole128537c2010-02-06 12:24:36 -050052module_param(report_undeciphered, bool, 0644);
53MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event");
54
Chase Douglasa4622302010-08-31 21:56:23 -040055#define TRACKPAD_REPORT_ID 0x28
56#define MOUSE_REPORT_ID 0x29
57#define DOUBLE_REPORT_ID 0xf7
Michael Poole128537c2010-02-06 12:24:36 -050058/* 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
Chase Douglas0b778e72010-06-20 21:32:30 -040069#define SCROLL_ACCEL_DEFAULT 7
70
Chase Douglas4f6fdf02011-08-05 09:16:57 -070071/* 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
Michael Poole128537c2010-02-06 12:24:36 -050093/**
94 * struct magicmouse_sc - Tracks Magic Mouse-specific data.
95 * @input: Input device through which we report events.
96 * @quirks: Currently unused.
Michael Poole128537c2010-02-06 12:24:36 -050097 * @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
Michael Poole128537c2010-02-06 12:24:36 -0500107 int ntouches;
108 int scroll_accel;
109 unsigned long scroll_jiffies;
110
111 struct {
112 short x;
113 short y;
Chase Douglasc0426682010-06-20 21:32:31 -0400114 short scroll_x;
Michael Poole128537c2010-02-06 12:24:36 -0500115 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{
Michael Poole71b38bd2010-02-11 00:32:57 -0500146 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;
Michael Poole128537c2010-02-06 12:24:36 -0500149
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)
Chase Douglas0b778e72010-06-20 21:32:30 -0400178 msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
Michael Poole128537c2010-02-06 12:24:36 -0500179}
180
181static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata)
182{
183 struct input_dev *input = msc->input;
Chase Douglasa4622302010-08-31 21:56:23 -0400184 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 }
Michael Poole128537c2010-02-06 12:24:36 -0500207
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;
Chase Douglas6de048b2010-08-31 21:56:20 -0400212 msc->touches[id].size = size;
Michael Poole128537c2010-02-06 12:24:36 -0500213
214 /* If requested, emulate a scroll wheel by detecting small
Chase Douglasef566d32010-06-02 10:28:25 -0400215 * vertical touch motions.
Michael Poole128537c2010-02-06 12:24:36 -0500216 */
Chase Douglasef566d32010-06-02 10:28:25 -0400217 if (emulate_scroll_wheel) {
Michael Poole128537c2010-02-06 12:24:36 -0500218 unsigned long now = jiffies;
Chase Douglasc0426682010-06-20 21:32:31 -0400219 int step_x = msc->touches[id].scroll_x - x;
220 int step_y = msc->touches[id].scroll_y - y;
Michael Poole128537c2010-02-06 12:24:36 -0500221
Michael Poole128537c2010-02-06 12:24:36 -0500222 /* Calculate and apply the scroll motion. */
Chase Douglas6de048b2010-08-31 21:56:20 -0400223 switch (state) {
Michael Poole128537c2010-02-06 12:24:36 -0500224 case TOUCH_STATE_START:
Chase Douglasc0426682010-06-20 21:32:31 -0400225 msc->touches[id].scroll_x = x;
Michael Poole128537c2010-02-06 12:24:36 -0500226 msc->touches[id].scroll_y = y;
Chase Douglas0b778e72010-06-20 21:32:30 -0400227
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
Michael Poole128537c2010-02-06 12:24:36 -0500236 break;
237 case TOUCH_STATE_DRAG:
Chase Douglasc0426682010-06-20 21:32:31 -0400238 step_x /= (64 - (int)scroll_speed) * msc->scroll_accel;
239 if (step_x != 0) {
240 msc->touches[id].scroll_x -= step_x *
Chase Douglas0b778e72010-06-20 21:32:30 -0400241 (64 - scroll_speed) * msc->scroll_accel;
Michael Poole128537c2010-02-06 12:24:36 -0500242 msc->scroll_jiffies = now;
Chase Douglasc0426682010-06-20 21:32:31 -0400243 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);
Michael Poole128537c2010-02-06 12:24:36 -0500252 }
253 break;
254 }
255 }
256
Yufeng Shena6d1bc12012-07-04 12:15:43 -0400257 if (down)
Chase Douglasa4622302010-08-31 21:56:23 -0400258 msc->ntouches++;
Yufeng Shena6d1bc12012-07-04 12:15:43 -0400259
260 input_mt_slot(input, id);
261 input_mt_report_slot_state(input, MT_TOOL_FINGER, down);
Chase Douglasa4622302010-08-31 21:56:23 -0400262
Michael Poole128537c2010-02-06 12:24:36 -0500263 /* Generate the input events for this touch. */
Yufeng Shen62643072012-07-04 12:14:43 -0400264 if (down) {
Henrik Rydberg921990b2010-08-31 21:56:24 -0400265 input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major << 2);
266 input_report_abs(input, ABS_MT_TOUCH_MINOR, touch_minor << 2);
Henrik Rydberg2d9ca4e2011-03-09 18:38:57 +0100267 input_report_abs(input, ABS_MT_ORIENTATION, -orientation);
Michael Poole128537c2010-02-06 12:24:36 -0500268 input_report_abs(input, ABS_MT_POSITION_X, x);
269 input_report_abs(input, ABS_MT_POSITION_Y, y);
270
Chase Douglasa4622302010-08-31 21:56:23 -0400271 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 }
Michael Poole128537c2010-02-06 12:24:36 -0500277 }
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;
Chase Douglasa4622302010-08-31 21:56:23 -0400285 int x = 0, y = 0, ii, clicks = 0, npoints;
Michael Poole128537c2010-02-06 12:24:36 -0500286
287 switch (data[0]) {
Chase Douglasa4622302010-08-31 21:56:23 -0400288 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 msc->ntouches = 0;
294 for (ii = 0; ii < npoints; ii++)
295 magicmouse_emit_touch(msc, ii, data + ii * 9 + 4);
296
Chase Douglasa4622302010-08-31 21:56:23 -0400297 clicks = data[1];
298
299 /* The following bits provide a device specific timestamp. They
300 * are unused here.
301 *
302 * ts = data[1] >> 6 | data[2] << 2 | data[3] << 10;
303 */
304 break;
305 case MOUSE_REPORT_ID:
Michael Poole128537c2010-02-06 12:24:36 -0500306 /* Expect six bytes of prefix, and N*8 bytes of touch data. */
307 if (size < 6 || ((size - 6) % 8) != 0)
308 return 0;
Chase Douglas0228db72010-09-02 16:49:52 +0200309 npoints = (size - 6) / 8;
310 msc->ntouches = 0;
311 for (ii = 0; ii < npoints; ii++)
Michael Poole128537c2010-02-06 12:24:36 -0500312 magicmouse_emit_touch(msc, ii, data + ii * 8 + 6);
Chase Douglase3612e82010-07-05 09:57:52 -0400313
Michael Poole128537c2010-02-06 12:24:36 -0500314 /* When emulating three-button mode, it is important
315 * to have the current touch information before
316 * generating a click event.
317 */
Michael Poole7d876c02010-07-05 10:50:09 -0400318 x = (int)(((data[3] & 0x0c) << 28) | (data[1] << 22)) >> 22;
319 y = (int)(((data[3] & 0x30) << 26) | (data[2] << 22)) >> 22;
Michael Poole128537c2010-02-06 12:24:36 -0500320 clicks = data[3];
Chase Douglasc61b7ce2010-09-02 16:51:54 +0200321
322 /* The following bits provide a device specific timestamp. They
323 * are unused here.
324 *
325 * ts = data[3] >> 6 | data[4] << 2 | data[5] << 10;
326 */
Michael Poole128537c2010-02-06 12:24:36 -0500327 break;
Chase Douglasa4622302010-08-31 21:56:23 -0400328 case DOUBLE_REPORT_ID:
329 /* Sometimes the trackpad sends two touch reports in one
330 * packet.
331 */
332 magicmouse_raw_event(hdev, report, data + 2, data[1]);
333 magicmouse_raw_event(hdev, report, data + 2 + data[1],
334 size - 2 - data[1]);
335 break;
Michael Poole128537c2010-02-06 12:24:36 -0500336 default:
337 return 0;
338 }
339
Chase Douglasa4622302010-08-31 21:56:23 -0400340 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
341 magicmouse_emit_buttons(msc, clicks & 3);
342 input_report_rel(input, REL_X, x);
343 input_report_rel(input, REL_Y, y);
344 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
345 input_report_key(input, BTN_MOUSE, clicks & 1);
Yufeng Shena6d1bc12012-07-04 12:15:43 -0400346 input_mt_report_pointer_emulation(input, true);
Chase Douglasa4622302010-08-31 21:56:23 -0400347 }
348
Michael Poole128537c2010-02-06 12:24:36 -0500349 input_sync(input);
350 return 1;
351}
352
Yufeng Shena6d1bc12012-07-04 12:15:43 -0400353static int magicmouse_setup_input(struct input_dev *input, struct hid_device *hdev)
Michael Poole128537c2010-02-06 12:24:36 -0500354{
Yufeng Shena6d1bc12012-07-04 12:15:43 -0400355 int error;
356
Michael Poole71b38bd2010-02-11 00:32:57 -0500357 __set_bit(EV_KEY, input->evbit);
Michael Poole128537c2010-02-06 12:24:36 -0500358
Chase Douglasa4622302010-08-31 21:56:23 -0400359 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
360 __set_bit(BTN_LEFT, input->keybit);
361 __set_bit(BTN_RIGHT, input->keybit);
362 if (emulate_3button)
363 __set_bit(BTN_MIDDLE, input->keybit);
364
365 __set_bit(EV_REL, input->evbit);
366 __set_bit(REL_X, input->relbit);
367 __set_bit(REL_Y, input->relbit);
368 if (emulate_scroll_wheel) {
369 __set_bit(REL_WHEEL, input->relbit);
370 __set_bit(REL_HWHEEL, input->relbit);
371 }
372 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
Daniel van Vugtbca62142011-10-14 13:39:34 +0800373 /* input->keybit is initialized with incorrect button info
374 * for Magic Trackpad. There really is only one physical
375 * button (BTN_LEFT == BTN_MOUSE). Make sure we don't
376 * advertise buttons that don't exist...
377 */
378 __clear_bit(BTN_RIGHT, input->keybit);
379 __clear_bit(BTN_MIDDLE, input->keybit);
Chase Douglasa4622302010-08-31 21:56:23 -0400380 __set_bit(BTN_MOUSE, input->keybit);
381 __set_bit(BTN_TOOL_FINGER, input->keybit);
382 __set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
383 __set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
384 __set_bit(BTN_TOOL_QUADTAP, input->keybit);
Yufeng Shena6d1bc12012-07-04 12:15:43 -0400385 __set_bit(BTN_TOOL_QUINTTAP, input->keybit);
Chase Douglasa4622302010-08-31 21:56:23 -0400386 __set_bit(BTN_TOUCH, input->keybit);
Chase Douglas503f7d52012-02-13 20:12:31 -0800387 __set_bit(INPUT_PROP_POINTER, input->propbit);
388 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
Chase Douglasc0426682010-06-20 21:32:31 -0400389 }
Michael Poole128537c2010-02-06 12:24:36 -0500390
Michael Poole128537c2010-02-06 12:24:36 -0500391
Yufeng Shen62643072012-07-04 12:14:43 -0400392 __set_bit(EV_ABS, input->evbit);
Chase Douglasa4622302010-08-31 21:56:23 -0400393
Henrik Rydbergb4adbbe2012-08-11 22:07:55 +0200394 error = input_mt_init_slots(input, 16, 0);
Yufeng Shena6d1bc12012-07-04 12:15:43 -0400395 if (error)
396 return error;
Yufeng Shen62643072012-07-04 12:14:43 -0400397 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255 << 2,
398 4, 0);
399 input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255 << 2,
400 4, 0);
401 input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0);
Chase Douglas4f6fdf02011-08-05 09:16:57 -0700402
Yufeng Shen62643072012-07-04 12:14:43 -0400403 /* Note: Touch Y position from the device is inverted relative
404 * to how pointer motion is reported (and relative to how USB
405 * HID recommends the coordinates work). This driver keeps
406 * the origin at the same position, and just uses the additive
407 * inverse of the reported Y.
408 */
409 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
410 input_set_abs_params(input, ABS_MT_POSITION_X,
411 MOUSE_MIN_X, MOUSE_MAX_X, 4, 0);
412 input_set_abs_params(input, ABS_MT_POSITION_Y,
413 MOUSE_MIN_Y, MOUSE_MAX_Y, 4, 0);
Chase Douglas4f6fdf02011-08-05 09:16:57 -0700414
Yufeng Shen62643072012-07-04 12:14:43 -0400415 input_abs_set_res(input, ABS_MT_POSITION_X,
416 MOUSE_RES_X);
417 input_abs_set_res(input, ABS_MT_POSITION_Y,
418 MOUSE_RES_Y);
419 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
420 input_set_abs_params(input, ABS_X, TRACKPAD_MIN_X,
421 TRACKPAD_MAX_X, 4, 0);
422 input_set_abs_params(input, ABS_Y, TRACKPAD_MIN_Y,
423 TRACKPAD_MAX_Y, 4, 0);
424 input_set_abs_params(input, ABS_MT_POSITION_X,
425 TRACKPAD_MIN_X, TRACKPAD_MAX_X, 4, 0);
426 input_set_abs_params(input, ABS_MT_POSITION_Y,
427 TRACKPAD_MIN_Y, TRACKPAD_MAX_Y, 4, 0);
Chase Douglascc5e0f02011-04-01 17:03:39 -0400428
Yufeng Shen62643072012-07-04 12:14:43 -0400429 input_abs_set_res(input, ABS_X, TRACKPAD_RES_X);
430 input_abs_set_res(input, ABS_Y, TRACKPAD_RES_Y);
431 input_abs_set_res(input, ABS_MT_POSITION_X,
432 TRACKPAD_RES_X);
433 input_abs_set_res(input, ABS_MT_POSITION_Y,
434 TRACKPAD_RES_Y);
Michael Poole128537c2010-02-06 12:24:36 -0500435 }
436
Yufeng Shen62643072012-07-04 12:14:43 -0400437 input_set_events_per_packet(input, 60);
438
Michael Poole128537c2010-02-06 12:24:36 -0500439 if (report_undeciphered) {
Michael Poole71b38bd2010-02-11 00:32:57 -0500440 __set_bit(EV_MSC, input->evbit);
441 __set_bit(MSC_RAW, input->mscbit);
Michael Poole128537c2010-02-06 12:24:36 -0500442 }
Yufeng Shena6d1bc12012-07-04 12:15:43 -0400443
444 return 0;
Michael Poole128537c2010-02-06 12:24:36 -0500445}
446
Michael Poole64eb1052010-09-24 13:58:18 +0200447static int magicmouse_input_mapping(struct hid_device *hdev,
448 struct hid_input *hi, struct hid_field *field,
449 struct hid_usage *usage, unsigned long **bit, int *max)
450{
451 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
452
453 if (!msc->input)
454 msc->input = hi->input;
455
Chase Douglas6a66bbd2010-12-08 15:08:04 -0800456 /* Magic Trackpad does not give relative data after switching to MT */
457 if (hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD &&
458 field->flags & HID_MAIN_ITEM_RELATIVE)
459 return -1;
460
Michael Poole64eb1052010-09-24 13:58:18 +0200461 return 0;
462}
463
Benjamin Tissoiresf1a9a142013-04-02 11:11:52 +0200464static void magicmouse_input_configured(struct hid_device *hdev,
465 struct hid_input *hi)
466
467{
468 struct magicmouse_sc *msc = hid_get_drvdata(hdev);
469
470 int ret = magicmouse_setup_input(msc->input, hdev);
471 if (ret) {
472 hid_err(hdev, "magicmouse setup input failed (%d)\n", ret);
473 /* clean msc->input to notify probe() of the failure */
474 msc->input = NULL;
475 }
476}
477
478
Michael Poole128537c2010-02-06 12:24:36 -0500479static int magicmouse_probe(struct hid_device *hdev,
480 const struct hid_device_id *id)
481{
Chase Douglas07735902010-08-31 21:56:19 -0400482 __u8 feature[] = { 0xd7, 0x01 };
Michael Poole128537c2010-02-06 12:24:36 -0500483 struct magicmouse_sc *msc;
484 struct hid_report *report;
485 int ret;
486
Benjamin Tissoiresabf832b2013-07-24 19:38:04 +0200487 msc = devm_kzalloc(&hdev->dev, sizeof(*msc), GFP_KERNEL);
Michael Poole128537c2010-02-06 12:24:36 -0500488 if (msc == NULL) {
Joe Perches4291ee32010-12-09 19:29:03 -0800489 hid_err(hdev, "can't alloc magicmouse descriptor\n");
Michael Poole128537c2010-02-06 12:24:36 -0500490 return -ENOMEM;
491 }
492
Chase Douglas0b778e72010-06-20 21:32:30 -0400493 msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
494
Michael Poole128537c2010-02-06 12:24:36 -0500495 msc->quirks = id->driver_data;
496 hid_set_drvdata(hdev, msc);
497
498 ret = hid_parse(hdev);
499 if (ret) {
Joe Perches4291ee32010-12-09 19:29:03 -0800500 hid_err(hdev, "magicmouse hid parse failed\n");
Benjamin Tissoiresabf832b2013-07-24 19:38:04 +0200501 return ret;
Michael Poole128537c2010-02-06 12:24:36 -0500502 }
503
Jiri Kosina23d02112010-05-12 16:01:26 +0200504 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
Michael Poole128537c2010-02-06 12:24:36 -0500505 if (ret) {
Joe Perches4291ee32010-12-09 19:29:03 -0800506 hid_err(hdev, "magicmouse hw start failed\n");
Benjamin Tissoiresabf832b2013-07-24 19:38:04 +0200507 return ret;
Michael Poole128537c2010-02-06 12:24:36 -0500508 }
509
Benjamin Tissoiresf1a9a142013-04-02 11:11:52 +0200510 if (!msc->input) {
511 hid_err(hdev, "magicmouse input not registered\n");
512 ret = -ENOMEM;
513 goto err_stop_hw;
Yufeng Shena6d1bc12012-07-04 12:15:43 -0400514 }
Jiri Kosina23d02112010-05-12 16:01:26 +0200515
Chase Douglasa4622302010-08-31 21:56:23 -0400516 if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE)
517 report = hid_register_report(hdev, HID_INPUT_REPORT,
518 MOUSE_REPORT_ID);
519 else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
520 report = hid_register_report(hdev, HID_INPUT_REPORT,
521 TRACKPAD_REPORT_ID);
522 report = hid_register_report(hdev, HID_INPUT_REPORT,
523 DOUBLE_REPORT_ID);
524 }
525
Michael Poole128537c2010-02-06 12:24:36 -0500526 if (!report) {
Joe Perches4291ee32010-12-09 19:29:03 -0800527 hid_err(hdev, "unable to register touch report\n");
Michael Poole128537c2010-02-06 12:24:36 -0500528 ret = -ENOMEM;
Michael Poole71b38bd2010-02-11 00:32:57 -0500529 goto err_stop_hw;
Michael Poole128537c2010-02-06 12:24:36 -0500530 }
531 report->size = 6;
532
Jiri Kosina35d851d2011-08-25 14:21:37 +0200533 /*
534 * Some devices repond with 'invalid report id' when feature
535 * report switching it into multitouch mode is sent to it.
536 *
537 * This results in -EIO from the _raw low-level transport callback,
538 * but there seems to be no other way of switching the mode.
539 * Thus the super-ugly hacky success check below.
540 */
Benjamin Tissoiresb0dd72a2014-02-10 12:58:54 -0500541 ret = hid_hw_raw_request(hdev, feature[0], feature, sizeof(feature),
542 HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
Jiri Kosina35d851d2011-08-25 14:21:37 +0200543 if (ret != -EIO && ret != sizeof(feature)) {
Joe Perches4291ee32010-12-09 19:29:03 -0800544 hid_err(hdev, "unable to request touch data (%d)\n", ret);
Michael Poole71b38bd2010-02-11 00:32:57 -0500545 goto err_stop_hw;
Michael Poole128537c2010-02-06 12:24:36 -0500546 }
547
Michael Poole128537c2010-02-06 12:24:36 -0500548 return 0;
Michael Poole71b38bd2010-02-11 00:32:57 -0500549err_stop_hw:
550 hid_hw_stop(hdev);
Michael Poole128537c2010-02-06 12:24:36 -0500551 return ret;
552}
553
Michael Poole128537c2010-02-06 12:24:36 -0500554static const struct hid_device_id magic_mice[] = {
Chase Douglasa4622302010-08-31 21:56:23 -0400555 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
556 USB_DEVICE_ID_APPLE_MAGICMOUSE), .driver_data = 0 },
557 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
558 USB_DEVICE_ID_APPLE_MAGICTRACKPAD), .driver_data = 0 },
Michael Poole128537c2010-02-06 12:24:36 -0500559 { }
560};
561MODULE_DEVICE_TABLE(hid, magic_mice);
562
563static struct hid_driver magicmouse_driver = {
564 .name = "magicmouse",
565 .id_table = magic_mice,
566 .probe = magicmouse_probe,
Michael Poole128537c2010-02-06 12:24:36 -0500567 .raw_event = magicmouse_raw_event,
Michael Poole64eb1052010-09-24 13:58:18 +0200568 .input_mapping = magicmouse_input_mapping,
Benjamin Tissoiresf1a9a142013-04-02 11:11:52 +0200569 .input_configured = magicmouse_input_configured,
Michael Poole128537c2010-02-06 12:24:36 -0500570};
H Hartley Sweetenf4254582012-12-17 15:28:26 -0700571module_hid_driver(magicmouse_driver);
Michael Poole128537c2010-02-06 12:24:36 -0500572
Michael Poole128537c2010-02-06 12:24:36 -0500573MODULE_LICENSE("GPL");