FILE
Huion__Kamvas13Gen3.bpf.c
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linux-6.19.14/drivers/hid/bpf/progs/Huion__Kamvas13Gen3.bpf.c
1// SPDX-License-Identifier: GPL-2.0-only 2/* Copyright (c) 2025 Nicholas LaPointe 3 */ 4 5#include "vmlinux.h" 6#include "hid_bpf.h" 7#include "hid_bpf_helpers.h" 8#include "hid_report_helpers.h" 9#include <bpf/bpf_tracing.h> 10 11#define VID_HUION 0x256c 12#define PID_KAMVAS13_GEN3 0x2008 13 14#define VENDOR_DESCRIPTOR_LENGTH 36 15#define TABLET_DESCRIPTOR_LENGTH 368 16#define WHEEL_DESCRIPTOR_LENGTH 108 17 18#define VENDOR_REPORT_ID 8 19#define VENDOR_REPORT_LENGTH 14 20 21#define VENDOR_REPORT_SUBTYPE_PEN 0x08 22#define VENDOR_REPORT_SUBTYPE_PEN_OUT 0x00 23#define VENDOR_REPORT_SUBTYPE_BUTTONS 0x0e 24#define VENDOR_REPORT_SUBTYPE_WHEELS 0x0f 25 26/* For the reports that we create ourselves */ 27#define CUSTOM_PAD_REPORT_ID 9 28 29HID_BPF_CONFIG( 30 HID_DEVICE(BUS_USB, HID_GROUP_ANY, VID_HUION, PID_KAMVAS13_GEN3), 31); 32 33 34/* 35 * This tablet can send reports using one of two different data formats, 36 * depending on what "mode" the tablet is in. 37 * 38 * By default, the tablet will send reports that can be decoded using its 39 * included HID descriptors (descriptors 1 and 2, shown below). 40 * This mode will be called "firmware mode" throughout this file. 41 * 42 * The HID descriptor that describes pen events in firmware mode (descriptor 1) 43 * has multiple bugs: 44 * * "Secondary Tip Switch" instead of "Secondary Barrel Switch" 45 * * "Invert" instead of (or potentially shared with) third barrel button 46 * * Specified tablet area of 2048 in³ instead of 293.8 x 165.2mm 47 * * Specified tilt range of -90 to +90 instead of -60 to +60 48 * 49 * While these can be easily patched up by editing the descriptor, a larger 50 * problem with the firmware mode exists: it is impossible to tell which of the 51 * two wheels are being rotated (or having their central button pressed). 52 * 53 * 54 * By using a tool such as huion-switcher (https://github.com/whot/huion-switcher), 55 * the tablet can be made to send reports using a proprietary format that is not 56 * adequately described by its relevant descriptor (descriptor 0, shown below). 57 * This mode will be called "vendor mode" throughout this file. 58 * 59 * The reports sent while in vendor mode allow for proper decoding of the wheels. 60 * 61 * For simplicity and maximum functionality, this BPF focuses strictly on 62 * enabling one to make use of the vendor mode. 63 */ 64 65/* 66 * DESCRIPTORS 67 * DESCRIPTOR 0 68 * # 0x06, 0x00, 0xff, // Usage Page (Vendor Defined Page FF00) 0 69 * # 0x09, 0x01, // Usage (Vendor Usage 0x01) 3 70 * # 0xa1, 0x01, // Collection (Application) 5 71 * # ┅ 0x85, 0x08, // Report ID (8) 7 72 * # 0x75, 0x68, // Report Size (104) 9 73 * # 0x95, 0x01, // Report Count (1) 11 74 * # 0x09, 0x01, // Usage (Vendor Usage 0x01) 13 75 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 15 76 * # 0xc0, // End Collection 17 77 * # 0x06, 0x00, 0xff, // Usage Page (Vendor Defined Page FF00) 18 78 * # 0x09, 0x01, // Usage (Vendor Usage 0x01) 21 79 * # 0xa1, 0x01, // Collection (Application) 23 80 * # ┅ 0x85, 0x16, // Report ID (22) 25 81 * # 0x75, 0x08, // Report Size (8) 27 82 * # 0x95, 0x07, // Report Count (7) 29 83 * # 0x09, 0x01, // Usage (Vendor Usage 0x01) 31 84 * # ║ 0xb1, 0x02, // Feature (Data,Var,Abs) 33 85 * # 0xc0, // End Collection 35 86 * R: 36 06 00 ff 09 01 a1 01 85 08 75 68 95 01 09 01 81 02 c0 06 00 ff 09 01 a1 01 85 16 75 08 95 07 09 01 b1 02 c0 87 * N: HUION Huion Tablet_GS1333 88 * I: 3 256c 2008 89 * 90 * DESCRIPTOR 1 91 * # 0x05, 0x0d, // Usage Page (Digitizers) 0 92 * # 0x09, 0x02, // Usage (Pen) 2 93 * # 0xa1, 0x01, // Collection (Application) 4 94 * # ┅ 0x85, 0x0a, // Report ID (10) 6 95 * # 0x09, 0x20, // Usage (Stylus) 8 96 * # 0xa1, 0x01, // Collection (Application) 10 97 * # 0x09, 0x42, // Usage (Tip Switch) 12 98 * # 0x09, 0x44, // Usage (Barrel Switch) 14 99 * # 0x09, 0x43, // Usage (Secondary Tip Switch) 16 100 * # 0x09, 0x3c, // Usage (Invert) 18 101 * # 0x09, 0x45, // Usage (Eraser) 20 102 * # 0x15, 0x00, // Logical Minimum (0) 22 103 * # 0x25, 0x01, // Logical Maximum (1) 24 104 * # 0x75, 0x01, // Report Size (1) 26 105 * # 0x95, 0x06, // Report Count (6) 28 106 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 30 107 * # 0x09, 0x32, // Usage (In Range) 32 108 * # 0x75, 0x01, // Report Size (1) 34 109 * # 0x95, 0x01, // Report Count (1) 36 110 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 38 111 * # ┇ 0x81, 0x03, // Input (Cnst,Var,Abs) 40 112 * # 0x05, 0x01, // Usage Page (Generic Desktop) 42 113 * # 0x09, 0x30, // Usage (X) 44 114 * # 0x09, 0x31, // Usage (Y) 46 115 * # 0x55, 0x0d, // Unit Exponent (-3) 48 116 * # 0x65, 0x33, // Unit (EnglishLinear: in³) 50 117 * # 0x26, 0xff, 0x7f, // Logical Maximum (32767) 52 118 * # 0x35, 0x00, // Physical Minimum (0) 55 119 * # 0x46, 0x00, 0x08, // Physical Maximum (2048) 57 120 * # 0x75, 0x10, // Report Size (16) 60 121 * # 0x95, 0x02, // Report Count (2) 62 122 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 64 123 * # 0x05, 0x0d, // Usage Page (Digitizers) 66 124 * # 0x09, 0x30, // Usage (Tip Pressure) 68 125 * # 0x26, 0xff, 0x3f, // Logical Maximum (16383) 70 126 * # 0x75, 0x10, // Report Size (16) 73 127 * # 0x95, 0x01, // Report Count (1) 75 128 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 77 129 * # 0x09, 0x3d, // Usage (X Tilt) 79 130 * # 0x09, 0x3e, // Usage (Y Tilt) 81 131 * # 0x15, 0xa6, // Logical Minimum (-90) 83 132 * # 0x25, 0x5a, // Logical Maximum (90) 85 133 * # 0x75, 0x08, // Report Size (8) 87 134 * # 0x95, 0x02, // Report Count (2) 89 135 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 91 136 * # 0xc0, // End Collection 93 137 * # 0xc0, // End Collection 94 138 * # 0x05, 0x0d, // Usage Page (Digitizers) 95 139 * # 0x09, 0x04, // Usage (Touch Screen) 97 140 * # 0xa1, 0x01, // Collection (Application) 99 141 * # ┅ 0x85, 0x04, // Report ID (4) 101 142 * # 0x09, 0x22, // Usage (Finger) 103 143 * # 0xa1, 0x02, // Collection (Logical) 105 144 * # 0x05, 0x0d, // Usage Page (Digitizers) 107 145 * # 0x95, 0x01, // Report Count (1) 109 146 * # 0x75, 0x06, // Report Size (6) 111 147 * # 0x09, 0x51, // Usage (Contact Identifier) 113 148 * # 0x15, 0x00, // Logical Minimum (0) 115 149 * # 0x25, 0x3f, // Logical Maximum (63) 117 150 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 119 151 * # 0x09, 0x42, // Usage (Tip Switch) 121 152 * # 0x25, 0x01, // Logical Maximum (1) 123 153 * # 0x75, 0x01, // Report Size (1) 125 154 * # 0x95, 0x01, // Report Count (1) 127 155 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 129 156 * # 0x75, 0x01, // Report Size (1) 131 157 * # 0x95, 0x01, // Report Count (1) 133 158 * # ┇ 0x81, 0x03, // Input (Cnst,Var,Abs) 135 159 * # 0x05, 0x01, // Usage Page (Generic Desktop) 137 160 * # 0x75, 0x10, // Report Size (16) 139 161 * # 0x55, 0x0e, // Unit Exponent (-2) 141 162 * # 0x65, 0x11, // Unit (SILinear: cm) 143 163 * # 0x09, 0x30, // Usage (X) 145 164 * # 0x26, 0xff, 0x7f, // Logical Maximum (32767) 147 165 * # 0x35, 0x00, // Physical Minimum (0) 150 166 * # 0x46, 0x15, 0x0c, // Physical Maximum (3093) 152 167 * # ┇ 0x81, 0x42, // Input (Data,Var,Abs,Null) 155 168 * # 0x09, 0x31, // Usage (Y) 157 169 * # 0x26, 0xff, 0x7f, // Logical Maximum (32767) 159 170 * # 0x46, 0xcb, 0x06, // Physical Maximum (1739) 162 171 * # ┇ 0x81, 0x42, // Input (Data,Var,Abs,Null) 165 172 * # 0x05, 0x0d, // Usage Page (Digitizers) 167 173 * # 0x09, 0x30, // Usage (Tip Pressure) 169 174 * # 0x26, 0xff, 0x1f, // Logical Maximum (8191) 171 175 * # 0x75, 0x10, // Report Size (16) 174 176 * # 0x95, 0x01, // Report Count (1) 176 177 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 178 178 * # 0xc0, // End Collection 180 179 * # 0x05, 0x0d, // Usage Page (Digitizers) 181 180 * # 0x09, 0x22, // Usage (Finger) 183 181 * # 0xa1, 0x02, // Collection (Logical) 185 182 * # 0x05, 0x0d, // Usage Page (Digitizers) 187 183 * # 0x95, 0x01, // Report Count (1) 189 184 * # 0x75, 0x06, // Report Size (6) 191 185 * # 0x09, 0x51, // Usage (Contact Identifier) 193 186 * # 0x15, 0x00, // Logical Minimum (0) 195 187 * # 0x25, 0x3f, // Logical Maximum (63) 197 188 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 199 189 * # 0x09, 0x42, // Usage (Tip Switch) 201 190 * # 0x25, 0x01, // Logical Maximum (1) 203 191 * # 0x75, 0x01, // Report Size (1) 205 192 * # 0x95, 0x01, // Report Count (1) 207 193 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 209 194 * # 0x75, 0x01, // Report Size (1) 211 195 * # 0x95, 0x01, // Report Count (1) 213 196 * # ┇ 0x81, 0x03, // Input (Cnst,Var,Abs) 215 197 * # 0x05, 0x01, // Usage Page (Generic Desktop) 217 198 * # 0x75, 0x10, // Report Size (16) 219 199 * # 0x55, 0x0e, // Unit Exponent (-2) 221 200 * # 0x65, 0x11, // Unit (SILinear: cm) 223 201 * # 0x09, 0x30, // Usage (X) 225 202 * # 0x26, 0xff, 0x7f, // Logical Maximum (32767) 227 203 * # 0x35, 0x00, // Physical Minimum (0) 230 204 * # 0x46, 0x15, 0x0c, // Physical Maximum (3093) 232 205 * # ┇ 0x81, 0x42, // Input (Data,Var,Abs,Null) 235 206 * # 0x09, 0x31, // Usage (Y) 237 207 * # 0x26, 0xff, 0x7f, // Logical Maximum (32767) 239 208 * # 0x46, 0xcb, 0x06, // Physical Maximum (1739) 242 209 * # ┇ 0x81, 0x42, // Input (Data,Var,Abs,Null) 245 210 * # 0x05, 0x0d, // Usage Page (Digitizers) 247 211 * # 0x09, 0x30, // Usage (Tip Pressure) 249 212 * # 0x26, 0xff, 0x1f, // Logical Maximum (8191) 251 213 * # 0x75, 0x10, // Report Size (16) 254 214 * # 0x95, 0x01, // Report Count (1) 256 215 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 258 216 * # 0xc0, // End Collection 260 217 * # 0x05, 0x0d, // Usage Page (Digitizers) 261 218 * # 0x09, 0x56, // Usage (Scan Time) 263 219 * # 0x55, 0x00, // Unit Exponent (0) 265 220 * # 0x65, 0x00, // Unit (None) 267 221 * # 0x27, 0xff, 0xff, 0xff, 0x7f, // Logical Maximum (2147483647) 269 222 * # 0x95, 0x01, // Report Count (1) 274 223 * # 0x75, 0x20, // Report Size (32) 276 224 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 278 225 * # 0x09, 0x54, // Usage (Contact Count) 280 226 * # 0x25, 0x7f, // Logical Maximum (127) 282 227 * # 0x95, 0x01, // Report Count (1) 284 228 * # 0x75, 0x08, // Report Size (8) 286 229 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 288 230 * # 0x75, 0x08, // Report Size (8) 290 231 * # 0x95, 0x08, // Report Count (8) 292 232 * # ┇ 0x81, 0x03, // Input (Cnst,Var,Abs) 294 233 * # ┅ 0x85, 0x05, // Report ID (5) 296 234 * # 0x09, 0x55, // Usage (Contact Count Maximum) 298 235 * # 0x25, 0x0a, // Logical Maximum (10) 300 236 * # 0x75, 0x08, // Report Size (8) 302 237 * # 0x95, 0x01, // Report Count (1) 304 238 * # ║ 0xb1, 0x02, // Feature (Data,Var,Abs) 306 239 * # 0x06, 0x00, 0xff, // Usage Page (Vendor Defined Page FF00) 308 240 * # 0x09, 0xc5, // Usage (Vendor Usage 0xc5) 311 241 * # ┅ 0x85, 0x06, // Report ID (6) 313 242 * # 0x15, 0x00, // Logical Minimum (0) 315 243 * # 0x26, 0xff, 0x00, // Logical Maximum (255) 317 244 * # 0x75, 0x08, // Report Size (8) 320 245 * # 0x96, 0x00, 0x01, // Report Count (256) 322 246 * # ║ 0xb1, 0x02, // Feature (Data,Var,Abs) 325 247 * # 0xc0, // End Collection 327 248 * # 0x05, 0x01, // Usage Page (Generic Desktop) 328 249 * # 0x09, 0x06, // Usage (Keyboard) 330 250 * # 0xa1, 0x01, // Collection (Application) 332 251 * # ┅ 0x85, 0x03, // Report ID (3) 334 252 * # 0x05, 0x07, // Usage Page (Keyboard/Keypad) 336 253 * # 0x19, 0xe0, // UsageMinimum (224) 338 254 * # 0x29, 0xe7, // UsageMaximum (231) 340 255 * # 0x15, 0x00, // Logical Minimum (0) 342 256 * # 0x25, 0x01, // Logical Maximum (1) 344 257 * # 0x75, 0x01, // Report Size (1) 346 258 * # 0x95, 0x08, // Report Count (8) 348 259 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 350 260 * # 0x05, 0x07, // Usage Page (Keyboard/Keypad) 352 261 * # 0x19, 0x00, // UsageMinimum (0) 354 262 * # 0x29, 0xff, // UsageMaximum (255) 356 263 * # 0x26, 0xff, 0x00, // Logical Maximum (255) 358 264 * # 0x75, 0x08, // Report Size (8) 361 265 * # 0x95, 0x06, // Report Count (6) 363 266 * # ┇ 0x81, 0x00, // Input (Data,Arr,Abs) 365 267 * # 0xc0, // End Collection 367 268 * R: 368 05 0d 09 02 a1 01 85 0a 09 20 a1 01 09 42 09 44 09 43 09 3c 09 45 15 00 25 01 75 01 95 06 81 02 09 32 75 01 95 01 81 02 81 03 05 01 09 30 09 31 55 0d 65 33 26 ff 7f 35 00 46 00 08 75 10 95 02 81 02 05 0d 09 30 26 ff 3f 75 10 95 01 81 02 09 3d 09 3e 15 a6 25 5a 75 08 95 02 81 02 c0 c0 05 0d 09 04 a1 01 85 04 09 22 a1 02 05 0d 95 01 75 06 09 51 15 00 25 3f 81 02 09 42 25 01 75 01 95 01 81 02 75 01 95 01 81 03 05 01 75 10 55 0e 65 11 09 30 26 ff 7f 35 00 46 15 0c 81 42 09 31 26 ff 7f 46 cb 06 81 42 05 0d 09 30 26 ff 1f 75 10 95 01 81 02 c0 05 0d 09 22 a1 02 05 0d 95 01 75 06 09 51 15 00 25 3f 81 02 09 42 25 01 75 01 95 01 81 02 75 01 95 01 81 03 05 01 75 10 55 0e 65 11 09 30 26 ff 7f 35 00 46 15 0c 81 42 09 31 26 ff 7f 46 cb 06 81 42 05 0d 09 30 26 ff 1f 75 10 95 01 81 02 c0 05 0d 09 56 55 00 65 00 27 ff ff ff 7f 95 01 75 20 81 02 09 54 25 7f 95 01 75 08 81 02 75 08 95 08 81 03 85 05 09 55 25 0a 75 08 95 01 b1 02 06 00 ff 09 c5 85 06 15 00 26 ff 00 75 08 96 00 01 b1 02 c0 05 01 09 06 a1 01 85 03 05 07 19 e0 29 e7 15 00 25 01 75 01 95 08 81 02 05 07 19 00 29 ff 26 ff 00 75 08 95 06 81 00 c0 269 * N: HUION Huion Tablet_GS1333 270 * I: 3 256c 2008 271 * 272 * DESCRIPTOR 2 273 * # 0x05, 0x01, // Usage Page (Generic Desktop) 0 274 * # 0x09, 0x0e, // Usage (System Multi-Axis Controller) 2 275 * # 0xa1, 0x01, // Collection (Application) 4 276 * # ┅ 0x85, 0x11, // Report ID (17) 6 277 * # 0x05, 0x0d, // Usage Page (Digitizers) 8 278 * # 0x09, 0x21, // Usage (Puck) 10 279 * # 0xa1, 0x02, // Collection (Logical) 12 280 * # 0x15, 0x00, // Logical Minimum (0) 14 281 * # 0x25, 0x01, // Logical Maximum (1) 16 282 * # 0x75, 0x01, // Report Size (1) 18 283 * # 0x95, 0x01, // Report Count (1) 20 284 * # 0xa1, 0x00, // Collection (Physical) 22 285 * # 0x05, 0x09, // Usage Page (Button) 24 286 * # 0x09, 0x01, // Usage (Button 1) 26 287 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 28 288 * # 0x05, 0x0d, // Usage Page (Digitizers) 30 289 * # 0x09, 0x33, // Usage (Touch) 32 290 * # ┇ 0x81, 0x02, // Input (Data,Var,Abs) 34 291 * # 0x95, 0x06, // Report Count (6) 36 292 * # ┇ 0x81, 0x03, // Input (Cnst,Var,Abs) 38 293 * # 0xa1, 0x02, // Collection (Logical) 40 294 * # 0x05, 0x01, // Usage Page (Generic Desktop) 42 295 * # 0x09, 0x37, // Usage (Dial) 44 296 * # 0x16, 0x00, 0x80, // Logical Minimum (-32768) 46 297 * # 0x26, 0xff, 0x7f, // Logical Maximum (32767) 49 298 * # 0x75, 0x10, // Report Size (16) 52 299 * # 0x95, 0x01, // Report Count (1) 54 300 * # ┇ 0x81, 0x06, // Input (Data,Var,Rel) 56 301 * # 0x35, 0x00, // Physical Minimum (0) 58 302 * # 0x46, 0x10, 0x0e, // Physical Maximum (3600) 60 303 * # 0x15, 0x00, // Logical Minimum (0) 63 304 * # 0x26, 0x10, 0x0e, // Logical Maximum (3600) 65 305 * # 0x09, 0x48, // Usage (Resolution Multiplier) 68 306 * # ║ 0xb1, 0x02, // Feature (Data,Var,Abs) 70 307 * # 0x45, 0x00, // Physical Maximum (0) 72 308 * # 0xc0, // End Collection 74 309 * # 0x75, 0x08, // Report Size (8) 75 310 * # 0x95, 0x01, // Report Count (1) 77 311 * # ┇ 0x81, 0x01, // Input (Cnst,Arr,Abs) 79 312 * # 0x75, 0x08, // Report Size (8) 81 313 * # 0x95, 0x01, // Report Count (1) 83 314 * # ┇ 0x81, 0x01, // Input (Cnst,Arr,Abs) 85 315 * # 0x75, 0x08, // Report Size (8) 87 316 * # 0x95, 0x01, // Report Count (1) 89 317 * # ┇ 0x81, 0x01, // Input (Cnst,Arr,Abs) 91 318 * # 0x75, 0x08, // Report Size (8) 93 319 * # 0x95, 0x01, // Report Count (1) 95 320 * # ┇ 0x81, 0x01, // Input (Cnst,Arr,Abs) 97 321 * # 0x75, 0x08, // Report Size (8) 99 322 * # 0x95, 0x01, // Report Count (1) 101 323 * # ┇ 0x81, 0x01, // Input (Cnst,Arr,Abs) 103 324 * # 0xc0, // End Collection 105 325 * # 0xc0, // End Collection 106 326 * # 0xc0, // End Collection 107 327 * R: 108 05 01 09 0e a1 01 85 11 05 0d 09 21 a1 02 15 00 25 01 75 01 95 01 a1 00 05 09 09 01 81 02 05 0d 09 33 81 02 95 06 81 03 a1 02 05 01 09 37 16 00 80 26 ff 7f 75 10 95 01 81 06 35 00 46 10 0e 15 00 26 10 0e 09 48 b1 02 45 00 c0 75 08 95 01 81 01 75 08 95 01 81 01 75 08 95 01 81 01 75 08 95 01 81 01 75 08 95 01 81 01 c0 c0 c0 328 * N: HUION Huion Tablet_GS1333 329 * I: 3 256c 2008 330 * 331 * 332 * 333 * 334 * 335 * 336 * 337 * 338 * VENDOR MODE 339 * HUION_FIRMWARE_ID="HUION_M22c_240606" 340 * HUION_MAGIC_BYTES="140388e500108100ff3fd8130307008008004010" 341 * 342 * MAGIC BYTES 343 * [LogicalMaximum, X] [LogicalMaximum, Y] [LogicalMaximum, Pressure] [ LPI] 344 * 14 03 [ 88 e5] 00 [ 10 81] 00 [ ff 3f] [d8 13] 03 07 00 80 08 00 40 10 345 * 346 * 347 * HIDRAW 0 348 * DESCRIPTIONS 349 * report_subtype = (data[1] >> 4) & 0x0f 350 * 351 * REPORT SUBTYPES 352 * 0x0e Buttons 353 * (data[4] & 0x01) button 1 354 * (data[4] & 0x02) button 2 355 * (data[4] & 0x04) button 3 356 * (data[4] & 0x08) button 4 357 * (data[4] & 0x10) button 5 358 * (data[4] & 0x20) button 6 (top wheel button) 359 * (data[4] & 0x40) button 7 (bottom wheel button) 360 * 361 * All tablet buttons release with the same report: 362 * 08 e0 01 01 00 00 00 00 00 00 00 00 00 00 363 * 364 * Despite data[4] looking like a bit field, only one button 365 * can be unambiguously tracked at a time. 366 * (See NOTES ON SIMULTANEOUS BUTTON HOLDS at the end of this 367 * comment for examples of the confusion this can create.) 368 * 369 * All buttons, with the exceptions of 6 and 7, will repeatedly 370 * report a press event approximately every 225ms while held. 371 * 372 * 0x0f Wheels 373 * data[3] == 1: top wheel 374 * data[3] == 2: bottom wheel 375 * data[5] == 1: clockwise 376 * data[5] == 2: counter-clockwise 377 * 378 * 0x08/0x00 Pen 379 * report_subtype == 0x08: in-range 380 * report_subtype == 0x00: out-of-range 381 * For clarity, this is also equivalent to: 382 * (data[1] & 0x80) in-range 383 * 384 * Switches 385 * (data[1] & 0x01) tip switch 386 * (data[1] & 0x02) barrel switch 387 * (data[1] & 0x04) secondary barrel switch 388 * (data[1] & 0x08) third barrel switch 389 * 390 * Unfortunately, I don't have a pen with an eraser, so I can't 391 * confirm where the invert and eraser bits reside. 392 * If we guess using the definitions from HID descriptor 1, 393 * then they might be... 394 * (data[1] & 0x08) invert (conflicts with third barrel switch) 395 * (data[1] & 0x10) eraser 396 * 397 * data[2], data[3] X (little-endian, maximum 0xe588) 398 * 399 * data[4], data[5] Y (little-endian, maximum 0x8110) 400 * 401 * data[6], data[7] Pressure (little-endian, maximum 0x3fff) 402 * 403 * data[10] X tilt (signed, -60 to +60) 404 * data[11] Y tilt (signed, -60 to +60, inverted) 405 * 406 * 407 * EXAMPLE REPORTS 408 * Top wheel button, press, hold, then release 409 * E: 000000.000040 14 08 e0 01 01 20 00 00 00 00 00 00 00 00 00 410 * E: 000001.531559 14 08 e0 01 01 00 00 00 00 00 00 00 00 00 00 411 * 412 * Bottom wheel button, press, hold, then release 413 * E: 000002.787603 14 08 e0 01 01 40 00 00 00 00 00 00 00 00 00 414 * E: 000004.215609 14 08 e0 01 01 00 00 00 00 00 00 00 00 00 00 415 * 416 * 417 * Top wheel rotation, one detent CW 418 * E: 000194.003899 14 08 f1 01 01 00 01 00 00 00 00 00 00 00 00 419 * 420 * Top wheel rotation, one detent CCW 421 * E: 000194.997812 14 08 f1 01 01 00 02 00 00 00 00 00 00 00 00 422 * 423 * Bottom wheel rotation, one detent CW 424 * E: 000196.693840 14 08 f1 01 02 00 01 00 00 00 00 00 00 00 00 425 * 426 * Bottom wheel rotation, one detent CCW 427 * E: 000197.757895 14 08 f1 01 02 00 02 00 00 00 00 00 00 00 00 428 * 429 * 430 * Button 1, press, hold, then release 431 * E: 000000.000149 14 08 e0 01 01 01 00 00 00 00 00 00 00 00 00 < press 432 * E: 000000.447598 14 08 e0 01 01 01 00 00 00 00 00 00 00 00 00 < starting to auto-repeat, every ~225ms 433 * E: 000000.673586 14 08 e0 01 01 01 00 00 00 00 00 00 00 00 00 434 * E: 000000.900582 14 08 e0 01 01 01 00 00 00 00 00 00 00 00 00 435 * E: 000001.126703 14 08 e0 01 01 01 00 00 00 00 00 00 00 00 00 436 * E: 000001.347706 14 08 e0 01 01 01 00 00 00 00 00 00 00 00 00 437 * E: 000001.533721 14 08 e0 01 01 00 00 00 00 00 00 00 00 00 00 < release 438 * 439 * Button 2, press, hold, then release 440 * E: 000003.304735 14 08 e0 01 01 02 00 00 00 00 00 00 00 00 00 < press 441 * E: 000003.746743 14 08 e0 01 01 02 00 00 00 00 00 00 00 00 00 < starting to auto-repeat, every ~225ms 442 * E: 000003.973741 14 08 e0 01 01 02 00 00 00 00 00 00 00 00 00 443 * E: 000004.199832 14 08 e0 01 01 02 00 00 00 00 00 00 00 00 00 444 * E: 000004.426732 14 08 e0 01 01 02 00 00 00 00 00 00 00 00 00 445 * E: 000004.647738 14 08 e0 01 01 02 00 00 00 00 00 00 00 00 00 446 * E: 000004.874733 14 08 e0 01 01 02 00 00 00 00 00 00 00 00 00 447 * E: 000004.930713 14 08 e0 01 01 00 00 00 00 00 00 00 00 00 00 < release 448 * 449 * Button 3, press, hold, then release 450 * E: 000006.650346 14 08 e0 01 01 04 00 00 00 00 00 00 00 00 00 < press 451 * E: 000007.051782 14 08 e0 01 01 04 00 00 00 00 00 00 00 00 00 < starting to auto-repeat, every ~225ms 452 * E: 000007.273738 14 08 e0 01 01 04 00 00 00 00 00 00 00 00 00 453 * E: 000007.499794 14 08 e0 01 01 04 00 00 00 00 00 00 00 00 00 454 * E: 000007.726725 14 08 e0 01 01 04 00 00 00 00 00 00 00 00 00 455 * E: 000007.947765 14 08 e0 01 01 04 00 00 00 00 00 00 00 00 00 456 * E: 000008.174755 14 08 e0 01 01 04 00 00 00 00 00 00 00 00 00 457 * E: 000008.328786 14 08 e0 01 01 00 00 00 00 00 00 00 00 00 00 < release 458 * 459 * Button 4, press, hold, then release 460 * E: 000009.893820 14 08 e0 01 01 08 00 00 00 00 00 00 00 00 00 < press 461 * E: 000010.274781 14 08 e0 01 01 08 00 00 00 00 00 00 00 00 00 < starting to auto-repeat, every ~225ms 462 * E: 000010.500931 14 08 e0 01 01 08 00 00 00 00 00 00 00 00 00 463 * E: 000010.722777 14 08 e0 01 01 08 00 00 00 00 00 00 00 00 00 464 * E: 000010.948778 14 08 e0 01 01 08 00 00 00 00 00 00 00 00 00 465 * E: 000011.175799 14 08 e0 01 01 08 00 00 00 00 00 00 00 00 00 466 * E: 000011.401153 14 08 e0 01 01 08 00 00 00 00 00 00 00 00 00 467 * E: 000011.432114 14 08 e0 01 01 00 00 00 00 00 00 00 00 00 00 < release 468 * 469 * Button 5, press, hold, then release 470 * E: 000013.007778 14 08 e0 01 01 10 00 00 00 00 00 00 00 00 00 < press 471 * E: 000013.424741 14 08 e0 01 01 10 00 00 00 00 00 00 00 00 00 < starting to auto-repeat, every ~225ms 472 * E: 000013.651715 14 08 e0 01 01 10 00 00 00 00 00 00 00 00 00 473 * E: 000013.872763 14 08 e0 01 01 10 00 00 00 00 00 00 00 00 00 474 * E: 000014.099789 14 08 e0 01 01 10 00 00 00 00 00 00 00 00 00 475 * E: 000014.325734 14 08 e0 01 01 10 00 00 00 00 00 00 00 00 00 476 * E: 000014.438080 14 08 e0 01 01 00 00 00 00 00 00 00 00 00 00 < release 477 * 478 * 479 * Pen: Top-left, then out of range 480 * E: 000368.572184 14 08 80 00 00 00 00 00 00 00 00 fb ed 03 00 481 * E: 000368.573030 14 08 00 00 00 00 00 00 00 00 00 fb ed 03 00 482 * 483 * Pen: Bottom-right, then out of range 484 * E: 000544.433185 14 08 80 88 e5 10 81 00 00 00 00 00 00 03 00 485 * E: 000544.434183 14 08 00 88 e5 10 81 00 00 00 00 00 00 03 00 486 * 487 * Pen: Max Y tilt (tip of pen points down) 488 * E: 000002.231927 14 08 80 f5 5d 6c 36 00 00 00 00 09 3c 03 00 489 * 490 * Pen: Min Y Tilt (tip of pen points up) 491 * E: 000657.593338 14 08 80 5f 69 fa 2c 00 00 00 00 fe c4 03 00 492 * 493 * Pen: Max X tilt (tip of pen points left) 494 * E: 000742.246503 14 08 80 2a 4f c4 38 00 00 00 00 3c ed 03 00 495 * 496 * Pen: Min X Tilt (tip of pen points right) 497 * E: 000776.404446 14 08 00 18 85 7c 3b 00 00 00 00 c4 ed 03 00 498 * 499 * Pen: Tip switch, max pressure, then low pressure 500 * E: 001138.935675 14 08 81 d2 66 04 40 ff 3f 00 00 00 08 03 00 501 * 502 * E: 001142.403715 14 08 81 9d 69 47 3e 82 04 00 00 00 07 03 00 503 * 504 * Pen: Barrel switch 505 * E: 001210.645652 14 08 82 0d 72 ea 2b 00 00 00 00 db c4 03 00 506 * 507 * Pen: Secondary barrel switch 508 * E: 001211.519729 14 08 84 2c 71 51 2b 00 00 00 00 da c4 03 00 509 * 510 * Pen: Third switch 511 * E: 001212.443722 14 08 88 1d 72 df 2b 00 00 00 00 dc c4 03 00 512 * 513 * 514 * HIDRAW 1 515 * No reports 516 * 517 * 518 * HIDRAW 2 519 * No reports 520 * 521 * 522 * 523 * 524 * 525 * 526 * 527 * 528 * FIRMWARE MODE 529 * HIDRAW 0 530 * No reports 531 * 532 * 533 * HIDRAW 1 534 * EXAMPLE REPORTS 535 * Top wheel button, *release* 536 * E: 000067.043739 8 03 00 00 00 00 00 00 00 537 * 538 * Bottom wheel button, *release* 539 * E: 000068.219161 8 03 00 00 00 00 00 00 00 540 * 541 * 542 * Button 1, press, then release 543 * E: 000163.767870 8 03 00 05 00 00 00 00 00 544 * E: 000165.969193 8 03 00 00 00 00 00 00 00 545 * 546 * Button 2, press, then release 547 * E: 000261.728935 8 03 05 11 00 00 00 00 00 548 * E: 000262.956220 8 03 00 00 00 00 00 00 00 549 * 550 * Button 3, press, then release 551 * E: 000289.127881 8 03 01 16 00 00 00 00 00 552 * E: 000290.014594 8 03 00 00 00 00 00 00 00 553 * 554 * Button 4, press, then release 555 * E: 000303.025839 8 03 00 2c 00 00 00 00 00 556 * E: 000303.994479 8 03 00 00 00 00 00 00 00 557 * 558 * Button 5, press, then release 559 * E: 000315.500835 8 03 05 1d 00 00 00 00 00 560 * E: 000316.603274 8 03 00 00 00 00 00 00 00 561 * 562 * BUTTON SUMMARY 563 * 1 E: 000163.767870 8 03 00 05 00 00 00 00 00 Keyboard: B 564 * 2 E: 000261.728935 8 03 05 11 00 00 00 00 00 Keyboard: LCtrl+LAlt N 565 * 3 E: 000289.127881 8 03 01 16 00 00 00 00 00 Keyboard: LCtrl S 566 * 4 E: 000303.025839 8 03 00 2c 00 00 00 00 00 Keyboard: Space 567 * 5 E: 000315.500835 8 03 05 1d 00 00 00 00 00 Keyboard: LCtrl+LAlt 568 * 569 * All buttons (including the wheel buttons) release the same way: 570 * 03 00 00 00 00 00 00 00 571 * 572 * 573 * Pen: Top-left, then out of range 574 * E: 000063.196828 10 0a c0 00 00 00 00 00 00 00 02 575 * E: 000063.197762 10 0a 00 00 00 00 00 00 00 00 02 576 * 577 * Pen: Bottom-right, then out of range 578 * E: 000197.123138 10 0a c0 ff 7f ff 7f 00 00 00 00 579 * E: 000197.124915 10 0a 00 ff 7f ff 7f 00 00 00 00 580 * 581 * Pen: Max Y Tilt (tip of pen points up) 582 * E: 000291.399541 10 0a c0 19 32 0b 58 00 00 00 3c 583 * 584 * Pen: Min Y tilt (tip of pen points down) 585 * E: 000340.888288 10 0a c0 85 40 89 6e 00 00 17 c4 586 * 587 * Pen: Max X tilt (tip of pen points left) 588 * E: 000165.575115 10 0a c0 a7 34 99 42 00 00 3c f4 589 * 590 * Pen: Min X Tilt (tip of pen points right) 591 * E: 000129.507883 10 0a c0 ea 4b 08 40 00 00 c4 1a 592 * 593 * Pen: Tip switch, max pressure, then low pressure 594 * E: 000242.077160 10 0a c1 7e 3c 12 31 ff 3f 03 fd 595 * 596 * E: 000339.139188 10 0a c1 ee 3a 9e 32 b5 00 06 f6 597 * 598 * Pen: Barrel switch 599 * E: 000037.949777 10 0a c2 5c 28 47 2a 00 00 f6 3c 600 * 601 * Pen: Secondary barrel switch 602 * E: 000038.320840 10 0a c4 e4 27 fd 29 00 00 f3 38 603 * 604 * Pen: Third switch 605 * E: 000038.923822 10 0a c8 97 27 5f 29 00 00 f2 33 606 * 607 * 608 * HIDRAW 2 609 * EXAMPLE REPORTS 610 * Either wheel rotation, one detent CW 611 * E: 000097.276573 9 11 00 01 00 00 00 00 00 00 612 * 613 * Either wheel rotation, one detent CCW 614 * E: 000153.416538 9 11 00 ff ff 00 00 00 00 00 615 * 616 * Either wheel rotation, increasing rotation speed CW 617 * (Note that the wheels on my particular tablet may be 618 * damaged, so the false rotation direction changes 619 * that can be observed might not happen on other units.) 620 * E: 000210.514925 9 11 00 01 00 00 00 00 00 00 621 * E: 000210.725718 9 11 00 01 00 00 00 00 00 00 622 * E: 000210.924009 9 11 00 01 00 00 00 00 00 00 623 * E: 000211.205629 9 11 00 01 00 00 00 00 00 00 624 * E: 000211.280521 9 11 00 0b 00 00 00 00 00 00 625 * E: 000211.340121 9 11 00 0e 00 00 00 00 00 00 626 * E: 000211.404018 9 11 00 0d 00 00 00 00 00 00 627 * E: 000211.462060 9 11 00 0e 00 00 00 00 00 00 628 * E: 000211.544886 9 11 00 0a 00 00 00 00 00 00 629 * E: 000211.606130 9 11 00 0d 00 00 00 00 00 00 630 * E: 000211.674560 9 11 00 0c 00 00 00 00 00 00 631 * E: 000211.712039 9 11 00 16 00 00 00 00 00 00 632 * E: 000211.748076 9 11 00 17 00 00 00 00 00 00 633 * E: 000211.786016 9 11 00 17 00 00 00 00 00 00 634 * E: 000211.832960 9 11 00 11 00 00 00 00 00 00 635 * E: 000211.874081 9 11 00 14 00 00 00 00 00 00 636 * E: 000211.925094 9 11 00 10 00 00 00 00 00 00 637 * E: 000211.959048 9 11 00 18 00 00 00 00 00 00 638 * E: 000212.006937 9 11 00 11 00 00 00 00 00 00 639 * E: 000212.050055 9 11 00 13 00 00 00 00 00 00 640 * E: 000212.091947 9 11 00 14 00 00 00 00 00 00 641 * E: 000212.122989 9 11 00 1a 00 00 00 00 00 00 642 * E: 000212.160866 9 11 00 16 00 00 00 00 00 00 643 * E: 000212.194002 9 11 00 19 00 00 00 00 00 00 644 * E: 000212.242249 9 11 00 11 00 00 00 00 00 00 645 * E: 000212.278061 9 11 00 18 00 00 00 00 00 00 646 * E: 000212.328899 9 11 00 10 00 00 00 00 00 00 647 * E: 000212.354005 9 11 00 22 00 00 00 00 00 00 648 * E: 000212.398995 9 11 00 12 00 00 00 00 00 00 649 * E: 000212.432050 9 11 00 19 00 00 00 00 00 00 650 * E: 000212.471164 9 11 00 16 00 00 00 00 00 00 651 * E: 000212.507047 9 11 00 17 00 00 00 00 00 00 652 * E: 000212.540964 9 11 00 19 00 00 00 00 00 00 653 * E: 000212.567942 9 11 00 1f 00 00 00 00 00 00 654 * E: 000212.610007 9 11 00 14 00 00 00 00 00 00 655 * E: 000212.641101 9 11 00 1b 00 00 00 00 00 00 656 * E: 000212.674113 9 11 00 19 00 00 00 00 00 00 657 * E: 000212.674909 9 11 00 01 00 00 00 00 00 00 658 * E: 000212.677062 9 11 00 00 02 00 00 00 00 00 659 * E: 000212.679048 9 11 00 55 01 00 00 00 00 00 660 * E: 000212.682166 9 11 00 55 01 00 00 00 00 00 661 * E: 000212.682788 9 11 00 ff ff 00 00 00 00 00 662 * E: 000212.683899 9 11 00 01 00 00 00 00 00 00 663 * E: 000212.685827 9 11 00 67 fe 00 00 00 00 00 664 * E: 000212.686941 9 11 00 00 08 00 00 00 00 00 665 * E: 000212.727840 9 11 00 14 00 00 00 00 00 00 666 * E: 000212.772884 9 11 00 13 00 00 00 00 00 00 667 * E: 000212.810975 9 11 00 16 00 00 00 00 00 00 668 * E: 000212.811793 9 11 00 00 08 00 00 00 00 00 669 * E: 000212.812683 9 11 00 01 00 00 00 00 00 00 670 * E: 000212.813905 9 11 00 01 00 00 00 00 00 00 671 * E: 000212.814909 9 11 00 00 04 00 00 00 00 00 672 * E: 000212.816942 9 11 00 01 00 00 00 00 00 00 673 * E: 000212.817851 9 11 00 ff ff 00 00 00 00 00 674 * E: 000212.818752 9 11 00 01 00 00 00 00 00 00 675 * E: 000212.819910 9 11 00 56 fd 00 00 00 00 00 676 * E: 000212.820781 9 11 00 ff ff 00 00 00 00 00 677 * E: 000212.821811 9 11 00 00 04 00 00 00 00 00 678 * E: 000212.822920 9 11 00 00 08 00 00 00 00 00 679 * E: 000212.823861 9 11 00 00 02 00 00 00 00 00 680 * E: 000212.828781 9 11 00 ba 00 00 00 00 00 00 681 * E: 000212.874097 9 11 00 12 00 00 00 00 00 00 682 * E: 000212.874872 9 11 00 00 fc 00 00 00 00 00 683 * E: 000212.876136 9 11 00 00 fc 00 00 00 00 00 684 * E: 000212.877036 9 11 00 00 f8 00 00 00 00 00 685 * E: 000212.877993 9 11 00 00 f8 00 00 00 00 00 686 * E: 000212.879748 9 11 00 01 00 00 00 00 00 00 687 * E: 000212.880728 9 11 00 01 00 00 00 00 00 00 688 * E: 000212.881956 9 11 00 00 04 00 00 00 00 00 689 * E: 000212.885065 9 11 00 ff ff 00 00 00 00 00 690 * E: 000212.917060 9 11 00 1a 00 00 00 00 00 00 691 * E: 000212.936458 9 11 00 2d 00 00 00 00 00 00 692 * E: 000212.957860 9 11 00 25 00 00 00 00 00 00 693 * E: 000212.984019 9 11 00 20 00 00 00 00 00 00 694 * E: 000213.017915 9 11 00 19 00 00 00 00 00 00 695 * E: 000213.039973 9 11 00 27 00 00 00 00 00 00 696 * E: 000213.065933 9 11 00 21 00 00 00 00 00 00 697 * E: 000213.085807 9 11 00 28 00 00 00 00 00 00 698 * E: 000213.108888 9 11 00 25 00 00 00 00 00 00 699 * E: 000213.129726 9 11 00 29 00 00 00 00 00 00 700 * E: 000213.172043 9 11 00 14 00 00 00 00 00 00 701 * E: 000213.195873 9 11 00 23 00 00 00 00 00 00 702 * E: 000213.222884 9 11 00 20 00 00 00 00 00 00 703 * E: 000213.243220 9 11 00 2a 00 00 00 00 00 00 704 * E: 000213.266778 9 11 00 24 00 00 00 00 00 00 705 * E: 000213.285951 9 11 00 2b 00 00 00 00 00 00 706 * E: 000213.306045 9 11 00 2a 00 00 00 00 00 00 707 * E: 000213.306796 9 11 00 ff ff 00 00 00 00 00 708 * E: 000213.307755 9 11 00 ff ff 00 00 00 00 00 709 * E: 000213.308820 9 11 00 ff ff 00 00 00 00 00 710 * E: 000213.309971 9 11 00 ff ff 00 00 00 00 00 711 * E: 000213.310980 9 11 00 01 00 00 00 00 00 00 712 * E: 000213.311853 9 11 00 01 00 00 00 00 00 00 713 * E: 000213.312861 9 11 00 aa 02 00 00 00 00 00 714 * E: 000213.313884 9 11 00 00 f8 00 00 00 00 00 715 * E: 000213.315111 9 11 00 ff ff 00 00 00 00 00 716 * E: 000213.315992 9 11 00 01 00 00 00 00 00 00 717 * E: 000213.316955 9 11 00 00 08 00 00 00 00 00 718 * E: 000213.346065 9 11 00 1d 00 00 00 00 00 00 719 * E: 000213.346963 9 11 00 ff ff 00 00 00 00 00 720 * E: 000213.347874 9 11 00 00 08 00 00 00 00 00 721 * E: 000213.348736 9 11 00 00 08 00 00 00 00 00 722 * E: 000213.349795 9 11 00 00 04 00 00 00 00 00 723 * E: 000213.350791 9 11 00 01 00 00 00 00 00 00 724 * E: 000213.351791 9 11 00 01 00 00 00 00 00 00 725 * E: 000213.352729 9 11 00 00 f8 00 00 00 00 00 726 * E: 000213.353811 9 11 00 01 00 00 00 00 00 00 727 * E: 000213.354755 9 11 00 00 f8 00 00 00 00 00 728 * E: 000213.355795 9 11 00 00 f8 00 00 00 00 00 729 * E: 000213.356813 9 11 00 01 00 00 00 00 00 00 730 * E: 000213.357817 9 11 00 00 04 00 00 00 00 00 731 * E: 000213.393838 9 11 00 17 00 00 00 00 00 00 732 * E: 000213.394719 9 11 00 00 04 00 00 00 00 00 733 * E: 000213.395682 9 11 00 00 08 00 00 00 00 00 734 * E: 000213.396679 9 11 00 00 04 00 00 00 00 00 735 * E: 000213.397651 9 11 00 00 fc 00 00 00 00 00 736 * E: 000213.398661 9 11 00 ff ff 00 00 00 00 00 737 * E: 000213.400308 9 11 00 56 fd 00 00 00 00 00 738 * E: 000213.400909 9 11 00 00 f8 00 00 00 00 00 739 * E: 000213.401837 9 11 00 01 00 00 00 00 00 00 740 * 741 * Either wheel rotation, increasing rotation speed CCW 742 * (Note that the wheels on my particular tablet may be 743 * damaged, so the false rotation direction changes 744 * that can be observed might not happen on other units.) 745 * E: 000040.527820 9 11 00 ff ff 00 00 00 00 00 746 * E: 000040.816644 9 11 00 ff ff 00 00 00 00 00 747 * E: 000040.880423 9 11 00 f3 ff 00 00 00 00 00 748 * E: 000040.882570 9 11 00 ff ff 00 00 00 00 00 749 * E: 000040.883381 9 11 00 ff ff 00 00 00 00 00 750 * E: 000040.885463 9 11 00 aa 02 00 00 00 00 00 751 * E: 000040.924106 9 11 00 ea ff 00 00 00 00 00 752 * E: 000041.006155 9 11 00 f6 ff 00 00 00 00 00 753 * E: 000041.085799 9 11 00 f6 ff 00 00 00 00 00 754 * E: 000041.168492 9 11 00 f6 ff 00 00 00 00 00 755 * E: 000041.233453 9 11 00 f3 ff 00 00 00 00 00 756 * E: 000041.296641 9 11 00 f3 ff 00 00 00 00 00 757 * E: 000041.370302 9 11 00 f5 ff 00 00 00 00 00 758 * E: 000041.437410 9 11 00 f4 ff 00 00 00 00 00 759 * E: 000041.474514 9 11 00 e9 ff 00 00 00 00 00 760 * E: 000041.522171 9 11 00 ef ff 00 00 00 00 00 761 * E: 000041.568160 9 11 00 ee ff 00 00 00 00 00 762 * E: 000041.608146 9 11 00 ec ff 00 00 00 00 00 763 * E: 000041.627132 9 11 00 d3 ff 00 00 00 00 00 764 * E: 000041.656151 9 11 00 e3 ff 00 00 00 00 00 765 * E: 000041.682264 9 11 00 e0 ff 00 00 00 00 00 766 * E: 000041.714186 9 11 00 e6 ff 00 00 00 00 00 767 * E: 000041.740339 9 11 00 e0 ff 00 00 00 00 00 768 * E: 000041.772087 9 11 00 e5 ff 00 00 00 00 00 769 * E: 000041.801093 9 11 00 e3 ff 00 00 00 00 00 770 * E: 000041.834051 9 11 00 e7 ff 00 00 00 00 00 771 * E: 000041.863094 9 11 00 e3 ff 00 00 00 00 00 772 * E: 000041.901016 9 11 00 ea ff 00 00 00 00 00 773 * E: 000041.901956 9 11 00 00 04 00 00 00 00 00 774 * E: 000041.902837 9 11 00 00 fe 00 00 00 00 00 775 * E: 000041.903927 9 11 00 01 00 00 00 00 00 00 776 * E: 000041.905066 9 11 00 01 00 00 00 00 00 00 777 * E: 000041.907214 9 11 00 00 fe 00 00 00 00 00 778 * E: 000041.909011 9 11 00 01 00 00 00 00 00 00 779 * E: 000041.909953 9 11 00 01 00 00 00 00 00 00 780 * E: 000041.910917 9 11 00 00 08 00 00 00 00 00 781 * E: 000041.913280 9 11 00 00 fe 00 00 00 00 00 782 * E: 000041.914121 9 11 00 56 fd 00 00 00 00 00 783 * E: 000041.915346 9 11 00 ff ff 00 00 00 00 00 784 * E: 000041.962101 9 11 00 ee ff 00 00 00 00 00 785 * E: 000041.964062 9 11 00 56 fd 00 00 00 00 00 786 * E: 000041.964978 9 11 00 00 fc 00 00 00 00 00 787 * E: 000041.968058 9 11 00 24 01 00 00 00 00 00 788 * E: 000041.968880 9 11 00 56 fd 00 00 00 00 00 789 * E: 000041.970977 9 11 00 aa 02 00 00 00 00 00 790 * E: 000041.971932 9 11 00 ff ff 00 00 00 00 00 791 * E: 000041.972943 9 11 00 01 00 00 00 00 00 00 792 * E: 000041.975291 9 11 00 ff ff 00 00 00 00 00 793 * E: 000041.978274 9 11 00 01 00 00 00 00 00 00 794 * E: 000042.035079 9 11 00 01 00 00 00 00 00 00 795 * E: 000042.041283 9 11 00 ff ff 00 00 00 00 00 796 * E: 000042.042057 9 11 00 00 04 00 00 00 00 00 797 * E: 000042.045169 9 11 00 ff ff 00 00 00 00 00 798 * E: 000042.051242 9 11 00 ff ff 00 00 00 00 00 799 * E: 000042.056099 9 11 00 63 ff 00 00 00 00 00 800 * E: 000042.106329 9 11 00 ef ff 00 00 00 00 00 801 * E: 000042.108601 9 11 00 ff ff 00 00 00 00 00 802 * E: 000042.116259 9 11 00 6b 00 00 00 00 00 00 803 * E: 000042.119140 9 11 00 55 01 00 00 00 00 00 804 * E: 000042.126101 9 11 00 88 ff 00 00 00 00 00 805 * E: 000042.158009 9 11 00 e6 ff 00 00 00 00 00 806 * E: 000042.172108 9 11 00 be ff 00 00 00 00 00 807 * E: 000042.207417 9 11 00 e8 ff 00 00 00 00 00 808 * E: 000042.223155 9 11 00 cc ff 00 00 00 00 00 809 * E: 000042.255185 9 11 00 e6 ff 00 00 00 00 00 810 * E: 000042.276280 9 11 00 d7 ff 00 00 00 00 00 811 * E: 000042.302128 9 11 00 e0 ff 00 00 00 00 00 812 * E: 000042.317423 9 11 00 c8 ff 00 00 00 00 00 813 * E: 000042.345226 9 11 00 e1 ff 00 00 00 00 00 814 * E: 000042.357243 9 11 00 bc ff 00 00 00 00 00 815 * E: 000042.381308 9 11 00 dc ff 00 00 00 00 00 816 * E: 000042.383180 9 11 00 dc fe 00 00 00 00 00 817 * E: 000042.412288 9 11 00 e3 ff 00 00 00 00 00 818 * E: 000042.451216 9 11 00 eb ff 00 00 00 00 00 819 * E: 000042.478372 9 11 00 e0 ff 00 00 00 00 00 820 * E: 000042.502116 9 11 00 dd ff 00 00 00 00 00 821 * E: 000042.520105 9 11 00 d3 ff 00 00 00 00 00 822 * E: 000042.540345 9 11 00 d6 ff 00 00 00 00 00 823 * E: 000042.541021 9 11 00 00 08 00 00 00 00 00 824 * E: 000042.542009 9 11 00 01 00 00 00 00 00 00 825 * E: 000042.543045 9 11 00 00 04 00 00 00 00 00 826 * E: 000042.544279 9 11 00 ff ff 00 00 00 00 00 827 * E: 000042.545097 9 11 00 ff ff 00 00 00 00 00 828 * E: 000042.546074 9 11 00 00 08 00 00 00 00 00 829 * E: 000042.547237 9 11 00 00 08 00 00 00 00 00 830 * E: 000042.548029 9 11 00 ff ff 00 00 00 00 00 831 * E: 000042.549304 9 11 00 00 f8 00 00 00 00 00 832 * E: 000042.553123 9 11 00 00 ff 00 00 00 00 00 833 * E: 000042.581186 9 11 00 e1 ff 00 00 00 00 00 834 * E: 000042.582238 9 11 00 00 f8 00 00 00 00 00 835 * E: 000042.583150 9 11 00 00 fc 00 00 00 00 00 836 * E: 000042.584273 9 11 00 00 f8 00 00 00 00 00 837 * E: 000042.585019 9 11 00 00 fc 00 00 00 00 00 838 * E: 000042.586059 9 11 00 01 00 00 00 00 00 00 839 * E: 000042.589012 9 11 00 67 fe 00 00 00 00 00 840 * E: 000042.590066 9 11 00 00 fc 00 00 00 00 00 841 * E: 000042.592916 9 11 00 dc fe 00 00 00 00 00 842 * E: 000042.621124 9 11 00 e1 ff 00 00 00 00 00 843 * E: 000042.622092 9 11 00 ff ff 00 00 00 00 00 844 * E: 000042.623069 9 11 00 01 00 00 00 00 00 00 845 * E: 000042.624030 9 11 00 ff ff 00 00 00 00 00 846 * E: 000042.625006 9 11 00 00 08 00 00 00 00 00 847 * E: 000042.626068 9 11 00 00 04 00 00 00 00 00 848 * E: 000042.626876 9 11 00 00 08 00 00 00 00 00 849 * E: 000042.628392 9 11 00 00 08 00 00 00 00 00 850 * E: 000042.628918 9 11 00 01 00 00 00 00 00 00 851 * E: 000042.630009 9 11 00 ff ff 00 00 00 00 00 852 * E: 000042.631934 9 11 00 00 fe 00 00 00 00 00 853 * E: 000042.656285 9 11 00 dd ff 00 00 00 00 00 854 * E: 000042.659870 9 11 00 cc 00 00 00 00 00 00 855 * E: 000042.666128 9 11 00 9d 00 00 00 00 00 00 856 * E: 000042.672458 9 11 00 80 ff 00 00 00 00 00 857 * E: 000042.696106 9 11 00 dc ff 00 00 00 00 00 858 * E: 000042.705129 9 11 00 61 00 00 00 00 00 00 859 * E: 000042.731303 9 11 00 e0 ff 00 00 00 00 00 860 * E: 000042.741278 9 11 00 ab ff 00 00 00 00 00 861 * E: 000042.788181 9 11 00 ee ff 00 00 00 00 00 862 * E: 000042.810441 9 11 00 db ff 00 00 00 00 00 863 * E: 000042.838073 9 11 00 e1 ff 00 00 00 00 00 864 * E: 000042.852235 9 11 00 c4 ff 00 00 00 00 00 865 * E: 000042.882290 9 11 00 e4 ff 00 00 00 00 00 866 * 867 * Either wheel button, press, hold, then release 868 * E: 000202.084982 9 11 02 00 00 00 00 00 00 00 869 * E: 000202.090172 9 11 03 00 00 00 00 00 00 00 870 * E: 000202.094139 9 11 03 00 00 00 00 00 00 00 871 * E: 000202.099172 9 11 03 00 00 00 00 00 00 00 872 * E: 000202.105055 9 11 03 00 00 00 00 00 00 00 873 * E: 000202.109132 9 11 03 00 00 00 00 00 00 00 874 * E: 000202.114185 9 11 03 00 00 00 00 00 00 00 875 * E: 000202.119212 9 11 03 00 00 00 00 00 00 00 876 * E: 000202.124264 9 11 03 00 00 00 00 00 00 00 877 * E: 000202.130147 9 11 03 00 00 00 00 00 00 00 878 * E: 000202.135138 9 11 03 00 00 00 00 00 00 00 879 * E: 000202.140072 9 11 03 00 00 00 00 00 00 00 880 * E: 000202.145146 9 11 03 00 00 00 00 00 00 00 881 * E: 000202.150157 9 11 03 00 00 00 00 00 00 00 882 * E: 000202.155339 9 11 03 00 00 00 00 00 00 00 883 * E: 000202.160064 9 11 03 00 00 00 00 00 00 00 884 * E: 000202.165026 9 11 03 00 00 00 00 00 00 00 885 * E: 000202.170037 9 11 03 00 00 00 00 00 00 00 886 * E: 000202.175154 9 11 03 00 00 00 00 00 00 00 887 * E: 000202.180044 9 11 03 00 00 00 00 00 00 00 888 * E: 000202.186280 9 11 03 00 00 00 00 00 00 00 889 * E: 000202.191281 9 11 03 00 00 00 00 00 00 00 890 * E: 000202.196106 9 11 03 00 00 00 00 00 00 00 891 * E: 000202.201083 9 11 03 00 00 00 00 00 00 00 892 * E: 000202.206166 9 11 03 00 00 00 00 00 00 00 893 * E: 000202.211084 9 11 03 00 00 00 00 00 00 00 894 * E: 000202.216175 9 11 03 00 00 00 00 00 00 00 895 * E: 000202.221036 9 11 03 00 00 00 00 00 00 00 896 * E: 000202.226271 9 11 03 00 00 00 00 00 00 00 897 * E: 000202.231150 9 11 03 00 00 00 00 00 00 00 898 * E: 000202.235924 9 11 03 00 00 00 00 00 00 00 899 * E: 000202.242046 9 11 03 00 00 00 00 00 00 00 900 * E: 000202.247164 9 11 03 00 00 00 00 00 00 00 901 * E: 000202.252359 9 11 03 00 00 00 00 00 00 00 902 * E: 000202.257295 9 11 03 00 00 00 00 00 00 00 903 * E: 000202.262167 9 11 03 00 00 00 00 00 00 00 904 * E: 000202.267081 9 11 03 00 00 00 00 00 00 00 905 * E: 000202.272175 9 11 03 00 00 00 00 00 00 00 906 * E: 000202.277085 9 11 03 00 00 00 00 00 00 00 907 * E: 000202.282596 9 11 03 00 00 00 00 00 00 00 908 * E: 000202.287078 9 11 03 00 00 00 00 00 00 00 909 * E: 000202.292191 9 11 03 00 00 00 00 00 00 00 910 * E: 000202.298196 9 11 03 00 00 00 00 00 00 00 911 * E: 000202.303004 9 11 03 00 00 00 00 00 00 00 912 * E: 000202.308113 9 11 03 00 00 00 00 00 00 00 913 * E: 000202.313079 9 11 03 00 00 00 00 00 00 00 914 * E: 000202.318243 9 11 03 00 00 00 00 00 00 00 915 * E: 000202.323309 9 11 03 00 00 00 00 00 00 00 916 * E: 000202.328190 9 11 03 00 00 00 00 00 00 00 917 * E: 000202.333050 9 11 03 00 00 00 00 00 00 00 918 * E: 000202.338162 9 11 03 00 00 00 00 00 00 00 919 * E: 000202.343022 9 11 03 00 00 00 00 00 00 00 920 * E: 000202.348113 9 11 03 00 00 00 00 00 00 00 921 * E: 000202.354133 9 11 03 00 00 00 00 00 00 00 922 * E: 000202.359132 9 11 03 00 00 00 00 00 00 00 923 * E: 000202.364053 9 11 03 00 00 00 00 00 00 00 924 * E: 000202.369034 9 11 03 00 00 00 00 00 00 00 925 * E: 000202.374144 9 11 03 00 00 00 00 00 00 00 926 * E: 000202.379027 9 11 03 00 00 00 00 00 00 00 927 * E: 000202.384238 9 11 03 00 00 00 00 00 00 00 928 * E: 000202.389249 9 11 03 00 00 00 00 00 00 00 929 * E: 000202.394049 9 11 03 00 00 00 00 00 00 00 930 * E: 000202.398949 9 11 03 00 00 00 00 00 00 00 931 * E: 000202.404203 9 11 03 00 00 00 00 00 00 00 932 * E: 000202.410098 9 11 03 00 00 00 00 00 00 00 933 * E: 000202.415237 9 11 00 00 00 00 00 00 00 00 934 * 935 * 936 * Top wheel button press and release while holding bottom wheel button 937 * (The reverse action (a bottom wheel button press while holding the top wheel button) is invisible.) 938 * E: 000071.126966 9 11 03 00 00 00 00 00 00 00 939 * E: 000071.133117 9 11 03 00 00 00 00 00 00 00 940 * E: 000071.137481 9 11 03 00 00 00 00 00 00 00 941 * E: 000071.142036 9 11 03 00 00 00 00 00 00 00 942 * E: 000071.147027 9 11 03 00 00 00 00 00 00 00 943 * E: 000071.151988 9 11 03 00 00 00 00 00 00 00 944 * E: 000071.157945 9 11 03 00 00 00 00 00 00 00 945 * E: 000071.163657 9 11 03 00 00 00 00 00 00 00 946 * E: 000071.168240 9 11 03 00 00 00 00 00 00 00 947 * E: 000071.173109 9 11 02 00 00 00 00 00 00 00 < top wheel button press? 948 * E: 000071.178119 9 11 03 00 00 00 00 00 00 00 949 * E: 000071.183046 9 11 03 00 00 00 00 00 00 00 950 * E: 000071.187983 9 11 03 00 00 00 00 00 00 00 951 * E: 000071.192996 9 11 03 00 00 00 00 00 00 00 952 * E: 000071.198341 9 11 03 00 00 00 00 00 00 00 953 * E: 000071.203122 9 11 03 00 00 00 00 00 00 00 954 * E: 000071.208998 9 11 03 00 00 00 00 00 00 00 955 * E: 000071.214037 9 11 03 00 00 00 00 00 00 00 956 * E: 000071.218945 9 11 03 00 00 00 00 00 00 00 957 * E: 000071.223835 9 11 03 00 00 00 00 00 00 00 958 * E: 000071.228987 9 11 03 00 00 00 00 00 00 00 959 * E: 000071.234082 9 11 03 00 00 00 00 00 00 00 960 * E: 000071.239028 9 11 03 00 00 00 00 00 00 00 961 * E: 000071.244307 9 11 00 00 00 00 00 00 00 00 < top wheel button release? 962 * E: 000071.245867 9 11 03 00 00 00 00 00 00 00 < continued hold of bottom button 963 * E: 000071.249959 9 11 03 00 00 00 00 00 00 00 964 * E: 000071.255032 9 11 03 00 00 00 00 00 00 00 965 * E: 000071.259972 9 11 03 00 00 00 00 00 00 00 966 * E: 000071.265409 9 11 03 00 00 00 00 00 00 00 967 * E: 000071.270156 9 11 03 00 00 00 00 00 00 00 968 * E: 000071.275530 9 11 03 00 00 00 00 00 00 00 969 * E: 000071.279975 9 11 03 00 00 00 00 00 00 00 970 * E: 000071.285046 9 11 03 00 00 00 00 00 00 00 971 * E: 000071.290906 9 11 03 00 00 00 00 00 00 00 972 * E: 000071.296146 9 11 03 00 00 00 00 00 00 00 973 * E: 000071.301288 9 11 03 00 00 00 00 00 00 00 974 * 975 * Top wheel button hold while top wheel rotate CCW 976 * (I did not test the other combinations of this) 977 * E: 000022.253144 9 11 03 00 00 00 00 00 00 00 978 * E: 000022.258157 9 11 03 00 00 00 00 00 00 00 979 * E: 000022.262011 9 11 00 ff ff 00 00 00 00 00 980 * E: 000022.264015 9 11 03 00 00 00 00 00 00 00 981 * E: 000022.268976 9 11 03 00 00 00 00 00 00 00 982 * 983 * 984 * 985 * 986 * 987 * 988 * 989 * 990 * NOTES ON SIMULTANEOUS BUTTON HOLDS 991 * (applies to vendor mode only) 992 * Value replacements for ease of reading: 993 * .7 = 0x40 (button 7, a wheel button) 994 * .1 = 0x01 (button 1, a pad button) 995 * rr = 0x00 (no buttons pressed) 996 * 997 * Press 7 998 * Press 1 999 * Release 7 1000 * Release 1 1001 * B: 000000.000152 42 08 e0 01 01 .7 00 00 00 00 00 00 00 00 00 1002 * B: 000000.781784 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1003 * B: 000000.869845 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1004 * B: 000001.095688 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1005 * B: 000001.322635 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1006 * B: 000001.543643 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1007 * B: 000001.770652 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1008 * B: 000001.885659 42 08 e0 01 01 rr 00 00 00 00 00 00 00 00 00 release of 7 1009 * B: 000001.993620 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1010 * B: 000002.220671 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1011 * B: 000002.446589 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1012 * B: 000002.672559 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1013 * B: 000002.765183 42 08 e0 01 01 rr 00 00 00 00 00 00 00 00 00 release of 1 1014 * 1015 * Press 7 1016 * Press 1 1017 * Release 1 1018 * Release 7 1019 * B: 000017.071517 42 08 e0 01 01 .7 00 00 00 00 00 00 00 00 00 1020 * B: 000018.270461 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1021 * B: 000018.419486 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1022 * B: 000018.646438 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1023 * B: 000018.872493 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1024 * B: 000019.094422 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1025 * B: 000019.320488 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1026 * B: 000020.360505 42 08 e0 01 01 rr 00 00 00 00 00 00 00 00 00 release of 1 is not reported until 7 is released, then both are rapidly reported 1027 * B: 000020.361091 42 08 e0 01 01 rr 00 00 00 00 00 00 00 00 00 1028 * 1029 * Press 1 1030 * Press 7 1031 * Release 7 1032 * Release 1 1033 * B: 000031.516315 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1034 * B: 000031.922299 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1035 * B: 000032.144165 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1036 * B: 000032.370262 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1037 * B: 000032.396242 42 08 e0 01 01 .7 00 00 00 00 00 00 00 00 00 1038 * B: 000032.597270 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1039 * B: 000032.818187 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1040 * B: 000033.045143 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1041 * B: 000033.267535 42 08 e0 01 01 rr 00 00 00 00 00 00 00 00 00 release of 7 1042 * B: 000033.272602 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1043 * B: 000033.494246 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1044 * B: 000033.721266 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1045 * B: 000033.947237 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1046 * B: 000034.169294 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1047 * B: 000034.183585 42 08 e0 01 01 rr 00 00 00 00 00 00 00 00 00 release of 1 1048 * 1049 * Press 1 1050 * Press 7 1051 * Release 1 1052 * Release 7 1053 * B: 000056.628429 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1054 * B: 000057.046348 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1055 * B: 000057.272044 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1056 * B: 000057.494434 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1057 * B: 000057.601224 42 08 e0 01 01 .7 00 00 00 00 00 00 00 00 00 1058 * B: 000057.719262 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1059 * B: 000057.946941 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1060 * B: 000058.172346 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1061 * B: 000058.393994 42 08 e0 01 01 .1 00 00 00 00 00 00 00 00 00 1062 * B: 000059.434576 42 08 e0 01 01 rr 00 00 00 00 00 00 00 00 00 release of 1 is not reported until 7 is released, then both are rapidly reported 1063 * B: 000059.435857 42 08 e0 01 01 rr 00 00 00 00 00 00 00 00 00 1064 */ 1065 1066 1067/* Filled in by udev-hid-bpf */ 1068char UDEV_PROP_HUION_FIRMWARE_ID[64]; 1069 1070char EXPECTED_FIRMWARE_ID[] = "HUION_M22c_"; 1071 1072__u8 last_button_state; 1073 1074static const __u8 disabled_rdesc_tablet[] = { 1075 FixedSizeVendorReport(28) /* Input report 4 */ 1076}; 1077 1078static const __u8 disabled_rdesc_wheel[] = { 1079 FixedSizeVendorReport(9) /* Input report 17 */ 1080}; 1081 1082static const __u8 fixed_rdesc_vendor[] = { 1083 UsagePage_Digitizers 1084 Usage_Dig_Pen 1085 CollectionApplication( 1086 ReportId(VENDOR_REPORT_ID) 1087 UsagePage_Digitizers 1088 Usage_Dig_Pen 1089 CollectionPhysical( 1090 /* 1091 * I have only examined the tablet's behavior while using 1092 * the PW600L pen, which does not have an eraser. 1093 * Because of this, I don't know where the Eraser and Invert 1094 * bits will go, or if they work as one would expect. 1095 * 1096 * For the time being, there is no expectation that a pen 1097 * with an eraser will work without modifications here. 1098 */ 1099 ReportSize(1) 1100 LogicalMinimum_i8(0) 1101 LogicalMaximum_i8(1) 1102 ReportCount(3) 1103 Usage_Dig_TipSwitch 1104 Usage_Dig_BarrelSwitch 1105 Usage_Dig_SecondaryBarrelSwitch 1106 Input(Var|Abs) 1107 PushPop( 1108 ReportCount(1) 1109 UsagePage_Button 1110 Usage_i8(0x4a) /* (BTN_STYLUS3 + 1) & 0xff */ 1111 Input(Var|Abs) 1112 ) 1113 ReportCount(3) 1114 Input(Const) 1115 ReportCount(1) 1116 Usage_Dig_InRange 1117 Input(Var|Abs) 1118 ReportSize(16) 1119 ReportCount(1) 1120 PushPop( 1121 UsagePage_GenericDesktop 1122 Unit(cm) 1123 UnitExponent(-2) 1124 LogicalMinimum_i16(0) 1125 PhysicalMinimum_i16(0) 1126 /* 1127 * The tablet has a logical maximum of 58760 x 33040 1128 * and a claimed resolution of 5080 LPI (200 L/mm) 1129 * This works out to a physical maximum of 1130 * 293.8 x 165.2mm, which matches Huion's advertised 1131 * active area dimensions from 1132 * https://www.huion.com/products/pen_display/Kamvas/kamvas-13-gen-3.html 1133 */ 1134 LogicalMaximum_i16(58760) 1135 PhysicalMaximum_i16(2938) 1136 Usage_GD_X 1137 Input(Var|Abs) 1138 LogicalMaximum_i16(33040) 1139 PhysicalMaximum_i16(1652) 1140 Usage_GD_Y 1141 Input(Var|Abs) 1142 ) 1143 LogicalMinimum_i16(0) 1144 LogicalMaximum_i16(16383) 1145 Usage_Dig_TipPressure 1146 Input(Var|Abs) 1147 ReportCount(1) 1148 Input(Const) 1149 ReportSize(8) 1150 ReportCount(2) 1151 PushPop( 1152 Unit(deg) 1153 UnitExponent(0) 1154 LogicalMinimum_i8(-60) 1155 PhysicalMinimum_i8(-60) 1156 LogicalMaximum_i8(60) 1157 PhysicalMaximum_i8(60) 1158 Usage_Dig_XTilt 1159 Usage_Dig_YTilt 1160 Input(Var|Abs) 1161 ) 1162 ) 1163 ) 1164 UsagePage_GenericDesktop 1165 Usage_GD_Keypad 1166 CollectionApplication( 1167 ReportId(CUSTOM_PAD_REPORT_ID) 1168 LogicalMinimum_i8(0) 1169 LogicalMaximum_i8(1) 1170 UsagePage_Digitizers 1171 Usage_Dig_TabletFunctionKeys 1172 CollectionPhysical( 1173 /* 1174 * The first 3 bytes are somewhat vestigial and will 1175 * always be set to zero. Their presence here is needed 1176 * to ensure that this device will be detected as a 1177 * tablet pad by software that otherwise wouldn't know 1178 * any better. 1179 */ 1180 /* (data[1] & 0x01) barrel switch */ 1181 ReportSize(1) 1182 ReportCount(1) 1183 Usage_Dig_BarrelSwitch 1184 Input(Var|Abs) 1185 ReportCount(7) 1186 Input(Const) 1187 /* data[2] X */ 1188 /* data[3] Y */ 1189 ReportSize(8) 1190 ReportCount(2) 1191 UsagePage_GenericDesktop 1192 Usage_GD_X 1193 Usage_GD_Y 1194 Input(Var|Abs) 1195 /* 1196 * (data[4] & 0x01) button 1 1197 * (data[4] & 0x02) button 2 1198 * (data[4] & 0x04) button 3 1199 * (data[4] & 0x08) button 4 1200 * (data[4] & 0x10) button 5 1201 * (data[4] & 0x20) button 6 (top wheel button) 1202 * (data[4] & 0x40) button 7 (bottom wheel button) 1203 */ 1204 ReportSize(1) 1205 ReportCount(7) 1206 UsagePage_Button 1207 UsageMinimum_i8(1) 1208 UsageMaximum_i8(7) 1209 Input(Var|Abs) 1210 ReportCount(1) 1211 Input(Const) 1212 /* data[5] top wheel (signed, positive clockwise) */ 1213 ReportSize(8) 1214 ReportCount(1) 1215 UsagePage_GenericDesktop 1216 Usage_GD_Wheel 1217 LogicalMinimum_i8(-1) 1218 LogicalMaximum_i8(1) 1219 Input(Var|Rel) 1220 /* data[6] bottom wheel (signed, positive clockwise) */ 1221 UsagePage_Consumer 1222 Usage_Con_ACPan 1223 Input(Var|Rel) 1224 ) 1225 /* 1226 * The kernel will drop reports that are bigger than the 1227 * largest report specified in the HID descriptor. 1228 * Therefore, our modified descriptor needs to have at least one 1229 * HID report that is as long as, or longer than, the largest 1230 * report in the original descriptor. 1231 * 1232 * This macro expands to a no-op report that is padded to the 1233 * provided length. 1234 */ 1235 FixedSizeVendorReport(VENDOR_REPORT_LENGTH) 1236 ) 1237}; 1238 1239SEC(HID_BPF_RDESC_FIXUP) 1240int BPF_PROG(hid_fix_rdesc_huion_kamvas13_gen3, struct hid_bpf_ctx *hid_ctx) 1241{ 1242 __u8 *data = hid_bpf_get_data(hid_ctx, 0 /* offset */, HID_MAX_DESCRIPTOR_SIZE /* size */); 1243 __s32 rdesc_size = hid_ctx->size; 1244 __u8 have_fw_id; 1245 1246 if (!data) 1247 return 0; /* EPERM check */ 1248 1249 have_fw_id = __builtin_memcmp(UDEV_PROP_HUION_FIRMWARE_ID, 1250 EXPECTED_FIRMWARE_ID, 1251 sizeof(EXPECTED_FIRMWARE_ID) - 1) == 0; 1252 1253 if (have_fw_id) { 1254 /* 1255 * Tablet should be in vendor mode. 1256 * Disable the unused devices 1257 */ 1258 if (rdesc_size == TABLET_DESCRIPTOR_LENGTH) { 1259 __builtin_memcpy(data, disabled_rdesc_tablet, 1260 sizeof(disabled_rdesc_tablet)); 1261 return sizeof(disabled_rdesc_tablet); 1262 } 1263 1264 if (rdesc_size == WHEEL_DESCRIPTOR_LENGTH) { 1265 __builtin_memcpy(data, disabled_rdesc_wheel, 1266 sizeof(disabled_rdesc_wheel)); 1267 return sizeof(disabled_rdesc_wheel); 1268 } 1269 } 1270 1271 /* 1272 * Regardless of which mode the tablet is in, always fix the vendor 1273 * descriptor in case the udev property just happened to not be set 1274 */ 1275 if (rdesc_size == VENDOR_DESCRIPTOR_LENGTH) { 1276 __builtin_memcpy(data, fixed_rdesc_vendor, sizeof(fixed_rdesc_vendor)); 1277 return sizeof(fixed_rdesc_vendor); 1278 } 1279 1280 return 0; 1281} 1282 1283SEC(HID_BPF_DEVICE_EVENT) 1284int BPF_PROG(hid_fix_event_huion_kamvas13_gen3, struct hid_bpf_ctx *hid_ctx) 1285{ 1286 __u8 *data = hid_bpf_get_data(hid_ctx, 0 /* offset */, VENDOR_REPORT_LENGTH /* size */); 1287 1288 if (!data) 1289 return 0; /* EPERM check */ 1290 1291 /* Handle vendor reports only */ 1292 if (hid_ctx->size != VENDOR_REPORT_LENGTH) 1293 return 0; 1294 if (data[0] != VENDOR_REPORT_ID) 1295 return 0; 1296 1297 __u8 report_subtype = (data[1] >> 4) & 0x0f; 1298 1299 if (report_subtype == VENDOR_REPORT_SUBTYPE_PEN || 1300 report_subtype == VENDOR_REPORT_SUBTYPE_PEN_OUT) { 1301 /* Invert Y tilt */ 1302 data[11] = -data[11]; 1303 1304 } else if (report_subtype == VENDOR_REPORT_SUBTYPE_BUTTONS || 1305 report_subtype == VENDOR_REPORT_SUBTYPE_WHEELS) { 1306 struct pad_report { 1307 __u8 report_id; 1308 __u8 btn_stylus:1; 1309 __u8 padding:7; 1310 __u8 x; 1311 __u8 y; 1312 __u8 buttons; 1313 __s8 top_wheel; 1314 __s8 bottom_wheel; 1315 } __attribute__((packed)) *pad_report; 1316 1317 __s8 top_wheel = 0; 1318 __s8 bottom_wheel = 0; 1319 1320 switch (report_subtype) { 1321 case VENDOR_REPORT_SUBTYPE_WHEELS: 1322 /* 1323 * The wheel direction byte is 1 for clockwise rotation 1324 * and 2 for counter-clockwise. 1325 * Change it to 1 and -1, respectively. 1326 */ 1327 switch (data[3]) { 1328 case 1: 1329 top_wheel = (data[5] == 1) ? 1 : -1; 1330 break; 1331 case 2: 1332 bottom_wheel = (data[5] == 1) ? 1 : -1; 1333 break; 1334 } 1335 break; 1336 1337 case VENDOR_REPORT_SUBTYPE_BUTTONS: 1338 /* 1339 * If a button is already being held, ignore any new 1340 * button event unless it's a release. 1341 * 1342 * The tablet only cleanly handles one button being held 1343 * at a time, and trying to hold multiple buttons 1344 * (particularly wheel+pad buttons) can result in sequences 1345 * of reports that look like imaginary presses and releases. 1346 * 1347 * This is an imperfect way to filter out some of these 1348 * reports. 1349 */ 1350 if (last_button_state != 0x00 && data[4] != 0x00) 1351 break; 1352 1353 last_button_state = data[4]; 1354 break; 1355 } 1356 1357 1358 pad_report = (struct pad_report *)data; 1359 1360 pad_report->report_id = CUSTOM_PAD_REPORT_ID; 1361 pad_report->btn_stylus = 0; 1362 pad_report->x = 0; 1363 pad_report->y = 0; 1364 pad_report->buttons = last_button_state; 1365 pad_report->top_wheel = top_wheel; 1366 pad_report->bottom_wheel = bottom_wheel; 1367 1368 return sizeof(struct pad_report); 1369 } 1370 1371 return 0; 1372} 1373 1374HID_BPF_OPS(huion_kamvas13_gen3) = { 1375 .hid_device_event = (void *)hid_fix_event_huion_kamvas13_gen3, 1376 .hid_rdesc_fixup = (void *)hid_fix_rdesc_huion_kamvas13_gen3, 1377}; 1378 1379SEC("syscall") 1380int probe(struct hid_bpf_probe_args *ctx) 1381{ 1382 switch (ctx->rdesc_size) { 1383 case VENDOR_DESCRIPTOR_LENGTH: 1384 case TABLET_DESCRIPTOR_LENGTH: 1385 case WHEEL_DESCRIPTOR_LENGTH: 1386 ctx->retval = 0; 1387 break; 1388 default: 1389 ctx->retval = -EINVAL; 1390 } 1391 1392 return 0; 1393} 1394 1395char _license[] SEC("license") = "GPL";
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