1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
|
#include "linux/delay.h"
#include "linux/input-event-codes.h"
#include "linux/input.h"
#include "linux/kern_levels.h"
#include "linux/printk.h"
#include <linux/usb.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/hid.h>
#include "startbit.h"
#define IR_SLEEP 150
struct point {
int x;
int y;
int is_ir;
};
struct accel {
int x;
int y;
int z;
};
struct wiimouse_dev {
struct hid_device* hdev;
struct input_dev* in_dev;
struct point points[4];
struct accel accel;
};
static void parse_accel(struct wiimouse_dev* wdev, __u8 data[5]) {
// Byte 0 of button data contains 2 lsbs of X - 10 bit precision
// Byte 1 contains lsbs of Y and Z - 9 bit precision
wdev->accel.x = (data[2] << 2) | (data[0] & 0b01100000) >> 5;
wdev->accel.y = data[3];
// Get bit 0
int y_bit0 = data[3] & 0x01;
// Get bit 1
int y_bit1 = data[1] & 0b00100000 >> 5;
// Clear last bit
wdev->accel.y &= 0b11111110;
// Apply bit 1 (pre-shift)
wdev->accel.y |= y_bit1;
// Shift to left by 1
wdev->accel.y <<= 1;
wdev->accel.y |= y_bit0;
wdev->accel.z = data[4];
// Get bit 0
int z_bit0 = data[4] & 0x01;
// Get bit 1
int z_bit1 = data[1] & 0b01000000 >> 6;
// Clear last bit
wdev->accel.z &= 0b11111110;
// Apply bit 1 (pre-shift)
wdev->accel.z |= z_bit1;
// Shift to left by 1
wdev->accel.z <<= 1;
wdev->accel.z |= z_bit0;
}
static void parse_extended_mode_ir(struct wiimouse_dev* wdev, __u8 data[10]) {
wdev->points[0].x = data[0] << 2 | ((data[2] & 0x30) >> 4);
wdev->points[0].y = data[1] << 2 | ((data[2] & 0xc0) >> 6);
wdev->points[1].x = data[3] << 2 | (data[2] & 0x03);
wdev->points[1].y = data[4] << 2 | ((data[2] & 0x0c) >> 2);
wdev->points[2].x = data[0 + 5] << 2 | ((data[2 + 5] & 0x30) >> 4);
wdev->points[2].y = data[1 + 5] << 2 | ((data[2 + 5] & 0xc0) >> 6);
wdev->points[3].x = data[3 + 5] << 2 | (data[2 + 5] & 0x03);
wdev->points[3].y = data[4 + 5] << 2 | ((data[2 + 5] & 0x0c) >> 2);
}
/*
* There can only be 6 combinations of points and one of them is the IR bar
* p1, p2 | p1, p3 | p1, p4 | p2, p3 | p2, p4 | p3, p4 |
* Or (4 * 3) / 2 = 6
* We need to find a line between 2 points of min distance such that:
* 1. px and py are the only points on the line
* 2. no other points are within some X distance of the line
*
* These points are normalized to rotation of controller
*/
static void get_ir_bar_points(struct wiimouse_dev* wdev) {
}
static const struct hid_device_id wiimouse_ids[] = {
{HID_BLUETOOTH_DEVICE(NINTENDO_WIIMOTE_VENDOR_ID, NINTENDO_WIIMOTE_PRODUCT_ID)},
{}
};
static int wiimote_ir_init(struct hid_device* hdev) {
int ret = 0;
__u8 enable_ir1[2] = { 0x13, 0x04};
if ((ret = hid_hw_output_report(hdev, (__u8*)enable_ir1, 2)) < 0) {
printk(KERN_DEBUG "enable ir 1");
return ret;
}
msleep(IR_SLEEP);
__u8 enable_ir2[2] = { 0x1a, 0x04};
if ((ret = hid_hw_output_report(hdev, (__u8*)enable_ir2, 2)) < 0) {
printk(KERN_DEBUG "enable ir 2");
return ret;
}
msleep(IR_SLEEP);
// Can be 0x08 or 0x01?? Weird behavior with wiimote... Wii writes 0x01 while libgc does former...
// Using 0x08 here (wii logic) which seems to work
__u8 enable[22] = { 0x16, 0x04, 0xb0, 0x00, 0x30, 0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, };
// Max sensitivity
__u8 sensitive_1[22] = { 0x16, 0x04, 0xb0, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, };
__u8 sensitive_2[22] = { 0x16, 0x04, 0xb0, 0x00, 0x1a, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, };
// Mode is 0x03 - extended mode
__u8 mode[22] = { 0x16, 0x04, 0xb0, 0x00, 0x33, 0x01, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, };
// Final rewrite to complete init
__u8 final[22] = { 0x16, 0x04, 0xb0, 0x00, 0x30, 0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, };
if ((ret = hid_hw_output_report(hdev, (__u8*)enable, 22)) < 0) {
printk(KERN_DEBUG "eeprom 1");
return ret;
}
msleep(IR_SLEEP);
if ((ret = hid_hw_output_report(hdev, (__u8*)sensitive_1, 22)) < 0) {
printk(KERN_DEBUG "sensitive 1");
return ret;
}
msleep(IR_SLEEP);
if ((ret = hid_hw_output_report(hdev, (__u8*)sensitive_2, 22)) < 0) {
printk(KERN_DEBUG "sensitive 2");
return ret;
}
msleep(IR_SLEEP);
if ((ret = hid_hw_output_report(hdev, (__u8*)mode, 22)) < 0) {
printk(KERN_DEBUG "mode");
return ret;
}
msleep(IR_SLEEP);
if ((ret = hid_hw_output_report(hdev, (__u8*)final, 22)) < 0) {
printk(KERN_DEBUG "eeprom 2");
return ret;
}
msleep(IR_SLEEP);
ret = 0;
return ret;
}
/*
* wiimote_init
* Initialize certain aspects of the wiimote such as the LEDs and sensors by
* sending appropriate HID reports to the device. Returns 0 on success, non-zero
* on error
* Details about the report details can be found in https://wiibrew.org/wiki/Wiimote
*/
static int wiimote_init(struct hid_device* hdev) {
int ret = 0;
__u8 rumble[2] = { HID_REPORT_ID_WIIMOTE_RUMBLE_ENABLE, HID_REPORT_DATA_WIIMOTE_RUMBLE_ENABLE };
if ((ret = hid_hw_output_report(hdev, (__u8*)rumble, 2)) < 0) return ret;
__u8 led_p1[2] = { HID_REPORT_ID_WIIMOTE_LED_ENABLE, HID_REPORT_DATA_WIIMOTE_LED_ENABLE_P1 };
if ((ret = hid_hw_output_report(hdev, (__u8*)led_p1, 2)) < 0) return ret;
// 0x33 - Core Buttons and Accelerometer with 12 IR bytes
// Format: (a1) 33 BB BB AA AA AA II II II II II II II II II II II II
// 0x04 means continous reporting
__u8 report_mode[3] = { 0x12, 0x04, 0x33 };
if ((ret = hid_hw_output_report(hdev, (__u8*)report_mode, 3)) < 0) return ret;
return ret;
}
static int wiimote_event(struct hid_device* hdev, struct hid_report* report, u8 *data, int size) {
printk(KERN_DEBUG "Report ID: %02x, Size: %d", report->id, size);
printk(KERN_DEBUG "Button Data: %02x, %02x", data[1], data[2]);
printk(KERN_DEBUG "Accel Data: %02x,%02x,%02x", data[3], data[4], data[5]);
printk(KERN_DEBUG "IR Data: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x", data[6], data[7], data[8], data[9], data[10], data[11], data[12], data[13], data[14], data[15]);
struct wiimouse_dev* wdev = hid_get_drvdata(hdev);
//Parse and save IR data
parse_extended_mode_ir(wdev, data + 6);
parse_accel(wdev, data);
if (data[2] & 0x08) {
printk(KERN_DEBUG "A button was pressed\n");
struct input_dev* in_dev = wdev->in_dev;
input_report_key(in_dev, BTN_LEFT, 1);
input_sync(in_dev);
input_report_key(in_dev, BTN_LEFT, 0);
input_sync(in_dev);
}
if (data[2] & 0x80) {
printk(KERN_DEBUG "HOME button was pressed, recalibrating IR\n");
wiimote_ir_init(hdev);
}
return 0;
}
MODULE_DEVICE_TABLE(hid, wiimouse_ids);
static int wiimouse_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
int ret = 0;
struct wiimouse_dev* wdev;
wdev = devm_kzalloc(&hdev->dev, sizeof(struct wiimouse_dev), GFP_KERNEL);
wdev->hdev = hdev;
struct input_dev* in_dev = input_allocate_device();
if(in_dev == NULL) {
return -1;
}
wdev->in_dev = in_dev;
in_dev->name = "Wiimouse";
in_dev->id.vendor = NINTENDO_WIIMOTE_VENDOR_ID;
in_dev->id.product = NINTENDO_WIIMOTE_PRODUCT_ID;
in_dev->id.version = 0x0000;
set_bit(EV_KEY, in_dev->evbit);
set_bit(BTN_LEFT, in_dev->keybit);
ret = input_register_device(in_dev);
if (ret) {
input_free_device(in_dev);
return ret;
}
printk(KERN_DEBUG "wiimouse-mouse: Starting parse");
/* Init hid device, setup input subsystem etc. */
ret = hid_parse(hdev);
if (ret) return ret;
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret) return ret;
wiimote_init(hdev);
printk(KERN_DEBUG "starting ir init");
if ((ret = wiimote_ir_init(hdev)) != 0) return ret;
hid_set_drvdata(hdev, wdev);
/* Init done, device ready to use */
printk(KERN_DEBUG "Hello I'm a wiimouse!");
return 0;
}
static void wiimote_remove(struct hid_device* hdev) {
struct wiimouse_dev* wdev = hid_get_drvdata(hdev);
input_unregister_device(wdev->in_dev);
}
static void wiimote_report(struct hid_device *hdev, struct hid_report *report) {
printk(KERN_DEBUG "Report ID: %02x\n", report->id);
}
static int wiimote_mapping(struct hid_device *hdev,
struct hid_input *hidinput, struct hid_field *field,
struct hid_usage *usage, unsigned long **bit, int *max) {
//printk(KERN_DEBUG "ID: %s", hidinput->name);
return 0;
}
static struct hid_driver wiimouse_driver = {
.name = "wiimouse-mouse",
.id_table = wiimouse_ids,
.probe = wiimouse_probe,
.raw_event = wiimote_event,
.report = wiimote_report,
.remove = wiimote_remove,
.input_mapping = wiimote_mapping
};
module_hid_driver(wiimouse_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Aaditya Dhruv");
MODULE_DESCRIPTION("Use your wiimote as a simple mouse");
|
