1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * HID driver for UC-Logic devices not fully compliant with HID standard 4 * 5 * Copyright (c) 2010-2014 Nikolai Kondrashov 6 * Copyright (c) 2013 Martin Rusko 7 */ 8 9/* 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the Free 12 * Software Foundation; either version 2 of the License, or (at your option) 13 * any later version. 14 */ 15 16#include <linux/device.h> 17#include <linux/hid.h> 18#include <linux/module.h> 19#include <linux/timer.h> 20#include "usbhid/usbhid.h" 21#include "hid-uclogic-params.h" 22 23#include "hid-ids.h" 24 25/* Driver data */ 26struct uclogic_drvdata { 27 /* Interface parameters */ 28 struct uclogic_params params; 29 /* Pointer to the replacement report descriptor. NULL if none. */ 30 __u8 *desc_ptr; 31 /* 32 * Size of the replacement report descriptor. 33 * Only valid if desc_ptr is not NULL 34 */ 35 unsigned int desc_size; 36 /* Pen input device */ 37 struct input_dev *pen_input; 38 /* In-range timer */ 39 struct timer_list inrange_timer; 40 /* Last rotary encoder state, or U8_MAX for none */ 41 u8 re_state; 42}; 43 44/** 45 * uclogic_inrange_timeout - handle pen in-range state timeout. 46 * Emulate input events normally generated when pen goes out of range for 47 * tablets which don't report that. 48 * 49 * @t: The timer the timeout handler is attached to, stored in a struct 50 * uclogic_drvdata. 51 */ 52static void uclogic_inrange_timeout(struct timer_list *t) 53{ 54 struct uclogic_drvdata *drvdata = from_timer(drvdata, t, 55 inrange_timer); 56 struct input_dev *input = drvdata->pen_input; 57 58 if (input == NULL) 59 return; 60 input_report_abs(input, ABS_PRESSURE, 0); 61 /* If BTN_TOUCH state is changing */ 62 if (test_bit(BTN_TOUCH, input->key)) { 63 input_event(input, EV_MSC, MSC_SCAN, 64 /* Digitizer Tip Switch usage */ 65 0xd0042); 66 input_report_key(input, BTN_TOUCH, 0); 67 } 68 input_report_key(input, BTN_TOOL_PEN, 0); 69 input_sync(input); 70} 71 72static __u8 *uclogic_report_fixup(struct hid_device *hdev, __u8 *rdesc, 73 unsigned int *rsize) 74{ 75 struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); 76 77 if (drvdata->desc_ptr != NULL) { 78 rdesc = drvdata->desc_ptr; 79 *rsize = drvdata->desc_size; 80 } 81 return rdesc; 82} 83 84static int uclogic_input_mapping(struct hid_device *hdev, 85 struct hid_input *hi, 86 struct hid_field *field, 87 struct hid_usage *usage, 88 unsigned long **bit, 89 int *max) 90{ 91 struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); 92 struct uclogic_params *params = &drvdata->params; 93 94 /* discard the unused pen interface */ 95 if (params->pen_unused && (field->application == HID_DG_PEN)) 96 return -1; 97 98 /* let hid-core decide what to do */ 99 return 0; 100} 101 102static int uclogic_input_configured(struct hid_device *hdev, 103 struct hid_input *hi) 104{ 105 struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); 106 struct uclogic_params *params = &drvdata->params; 107 char *name; 108 const char *suffix = NULL; 109 struct hid_field *field; 110 size_t len; 111 112 /* no report associated (HID_QUIRK_MULTI_INPUT not set) */ 113 if (!hi->report) 114 return 0; 115 116 /* 117 * If this is the input corresponding to the pen report 118 * in need of tweaking. 119 */ 120 if (hi->report->id == params->pen.id) { 121 /* Remember the input device so we can simulate events */ 122 drvdata->pen_input = hi->input; 123 } 124 125 field = hi->report->field[0]; 126 127 switch (field->application) { 128 case HID_GD_KEYBOARD: 129 suffix = "Keyboard"; 130 break; 131 case HID_GD_MOUSE: 132 suffix = "Mouse"; 133 break; 134 case HID_GD_KEYPAD: 135 suffix = "Pad"; 136 break; 137 case HID_DG_PEN: 138 suffix = "Pen"; 139 break; 140 case HID_CP_CONSUMER_CONTROL: 141 suffix = "Consumer Control"; 142 break; 143 case HID_GD_SYSTEM_CONTROL: 144 suffix = "System Control"; 145 break; 146 } 147 148 if (suffix) { 149 len = strlen(hdev->name) + 2 + strlen(suffix); 150 name = devm_kzalloc(&hi->input->dev, len, GFP_KERNEL); 151 if (name) { 152 snprintf(name, len, "%s %s", hdev->name, suffix); 153 hi->input->name = name; 154 } 155 } 156 157 return 0; 158} 159 160static int uclogic_probe(struct hid_device *hdev, 161 const struct hid_device_id *id) 162{ 163 int rc; 164 struct uclogic_drvdata *drvdata = NULL; 165 bool params_initialized = false; 166 167 if (!hid_is_usb(hdev)) 168 return -EINVAL; 169 170 /* 171 * libinput requires the pad interface to be on a different node 172 * than the pen, so use QUIRK_MULTI_INPUT for all tablets. 173 */ 174 hdev->quirks |= HID_QUIRK_MULTI_INPUT; 175 hdev->quirks |= HID_QUIRK_HIDINPUT_FORCE; 176 177 /* Allocate and assign driver data */ 178 drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL); 179 if (drvdata == NULL) { 180 rc = -ENOMEM; 181 goto failure; 182 } 183 timer_setup(&drvdata->inrange_timer, uclogic_inrange_timeout, 0); 184 drvdata->re_state = U8_MAX; 185 hid_set_drvdata(hdev, drvdata); 186 187 /* Initialize the device and retrieve interface parameters */ 188 rc = uclogic_params_init(&drvdata->params, hdev); 189 if (rc != 0) { 190 hid_err(hdev, "failed probing parameters: %d\n", rc); 191 goto failure; 192 } 193 params_initialized = true; 194 hid_dbg(hdev, "parameters:\n" UCLOGIC_PARAMS_FMT_STR, 195 UCLOGIC_PARAMS_FMT_ARGS(&drvdata->params)); 196 if (drvdata->params.invalid) { 197 hid_info(hdev, "interface is invalid, ignoring\n"); 198 rc = -ENODEV; 199 goto failure; 200 } 201 202 /* Generate replacement report descriptor */ 203 rc = uclogic_params_get_desc(&drvdata->params, 204 &drvdata->desc_ptr, 205 &drvdata->desc_size); 206 if (rc) { 207 hid_err(hdev, 208 "failed generating replacement report descriptor: %d\n", 209 rc); 210 goto failure; 211 } 212 213 rc = hid_parse(hdev); 214 if (rc) { 215 hid_err(hdev, "parse failed\n"); 216 goto failure; 217 } 218 219 rc = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 220 if (rc) { 221 hid_err(hdev, "hw start failed\n"); 222 goto failure; 223 } 224 225 return 0; 226failure: 227 /* Assume "remove" might not be called if "probe" failed */ 228 if (params_initialized) 229 uclogic_params_cleanup(&drvdata->params); 230 return rc; 231} 232 233#ifdef CONFIG_PM 234static int uclogic_resume(struct hid_device *hdev) 235{ 236 int rc; 237 struct uclogic_params params; 238 239 /* Re-initialize the device, but discard parameters */ 240 rc = uclogic_params_init(¶ms, hdev); 241 if (rc != 0) 242 hid_err(hdev, "failed to re-initialize the device\n"); 243 else 244 uclogic_params_cleanup(¶ms); 245 246 return rc; 247} 248#endif 249 250static int uclogic_raw_event(struct hid_device *hdev, 251 struct hid_report *report, 252 u8 *data, int size) 253{ 254 struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); 255 struct uclogic_params *params = &drvdata->params; 256 257 /* Tweak pen reports, if necessary */ 258 if (!params->pen_unused && 259 (report->type == HID_INPUT_REPORT) && 260 (report->id == params->pen.id) && 261 (size >= 2)) { 262 /* If it's the "virtual" frame controls report */ 263 if (params->frame.id != 0 && 264 data[1] & params->pen_frame_flag) { 265 /* Change to virtual frame controls report ID */ 266 data[0] = params->frame.id; 267 return 0; 268 } 269 /* If in-range reports are inverted */ 270 if (params->pen.inrange == 271 UCLOGIC_PARAMS_PEN_INRANGE_INVERTED) { 272 /* Invert the in-range bit */ 273 data[1] ^= 0x40; 274 } 275 /* 276 * If report contains fragmented high-resolution pen 277 * coordinates 278 */ 279 if (size >= 10 && params->pen.fragmented_hires) { 280 u8 pressure_low_byte; 281 u8 pressure_high_byte; 282 283 /* Lift pressure bytes */ 284 pressure_low_byte = data[6]; 285 pressure_high_byte = data[7]; 286 /* 287 * Move Y coord to make space for high-order X 288 * coord byte 289 */ 290 data[6] = data[5]; 291 data[5] = data[4]; 292 /* Move high-order X coord byte */ 293 data[4] = data[8]; 294 /* Move high-order Y coord byte */ 295 data[7] = data[9]; 296 /* Place pressure bytes */ 297 data[8] = pressure_low_byte; 298 data[9] = pressure_high_byte; 299 } 300 /* If we need to emulate in-range detection */ 301 if (params->pen.inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE) { 302 /* Set in-range bit */ 303 data[1] |= 0x40; 304 /* (Re-)start in-range timeout */ 305 mod_timer(&drvdata->inrange_timer, 306 jiffies + msecs_to_jiffies(100)); 307 } 308 } 309 310 /* Tweak frame control reports, if necessary */ 311 if ((report->type == HID_INPUT_REPORT) && 312 (report->id == params->frame.id)) { 313 /* If need to, and can, set pad device ID for Wacom drivers */ 314 if (params->frame.dev_id_byte > 0 && 315 params->frame.dev_id_byte < size) { 316 data[params->frame.dev_id_byte] = 0xf; 317 } 318 /* If need to, and can, read rotary encoder state change */ 319 if (params->frame.re_lsb > 0 && 320 params->frame.re_lsb / 8 < size) { 321 unsigned int byte = params->frame.re_lsb / 8; 322 unsigned int bit = params->frame.re_lsb % 8; 323 324 u8 change; 325 u8 prev_state = drvdata->re_state; 326 /* Read Gray-coded state */ 327 u8 state = (data[byte] >> bit) & 0x3; 328 /* Encode state change into 2-bit signed integer */ 329 if ((prev_state == 1 && state == 0) || 330 (prev_state == 2 && state == 3)) { 331 change = 1; 332 } else if ((prev_state == 2 && state == 0) || 333 (prev_state == 1 && state == 3)) { 334 change = 3; 335 } else { 336 change = 0; 337 } 338 /* Write change */ 339 data[byte] = (data[byte] & ~((u8)3 << bit)) | 340 (change << bit); 341 /* Remember state */ 342 drvdata->re_state = state; 343 } 344 } 345 346 return 0; 347} 348 349static void uclogic_remove(struct hid_device *hdev) 350{ 351 struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); 352 353 del_timer_sync(&drvdata->inrange_timer); 354 hid_hw_stop(hdev); 355 kfree(drvdata->desc_ptr); 356 uclogic_params_cleanup(&drvdata->params); 357} 358 359static const struct hid_device_id uclogic_devices[] = { 360 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 361 USB_DEVICE_ID_UCLOGIC_TABLET_PF1209) }, 362 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 363 USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U) }, 364 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 365 USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U) }, 366 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 367 USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U) }, 368 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 369 USB_DEVICE_ID_UCLOGIC_TABLET_WP1062) }, 370 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 371 USB_DEVICE_ID_UCLOGIC_WIRELESS_TABLET_TWHL850) }, 372 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 373 USB_DEVICE_ID_UCLOGIC_TABLET_TWHA60) }, 374 { HID_USB_DEVICE(USB_VENDOR_ID_HUION, 375 USB_DEVICE_ID_HUION_TABLET) }, 376 { HID_USB_DEVICE(USB_VENDOR_ID_HUION, 377 USB_DEVICE_ID_HUION_HS64) }, 378 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 379 USB_DEVICE_ID_HUION_TABLET) }, 380 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 381 USB_DEVICE_ID_YIYNOVA_TABLET) }, 382 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 383 USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_81) }, 384 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 385 USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_45) }, 386 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 387 USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_47) }, 388 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 389 USB_DEVICE_ID_UCLOGIC_DRAWIMAGE_G3) }, 390 { HID_USB_DEVICE(USB_VENDOR_ID_UGTIZER, 391 USB_DEVICE_ID_UGTIZER_TABLET_GP0610) }, 392 { HID_USB_DEVICE(USB_VENDOR_ID_UGTIZER, 393 USB_DEVICE_ID_UGTIZER_TABLET_GT5040) }, 394 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 395 USB_DEVICE_ID_UGEE_TABLET_G5) }, 396 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 397 USB_DEVICE_ID_UGEE_TABLET_EX07S) }, 398 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 399 USB_DEVICE_ID_UGEE_TABLET_RAINBOW_CV720) }, 400 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 401 USB_DEVICE_ID_UGEE_XPPEN_TABLET_G540) }, 402 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 403 USB_DEVICE_ID_UGEE_XPPEN_TABLET_G640) }, 404 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 405 USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01) }, 406 { } 407}; 408MODULE_DEVICE_TABLE(hid, uclogic_devices); 409 410static struct hid_driver uclogic_driver = { 411 .name = "uclogic", 412 .id_table = uclogic_devices, 413 .probe = uclogic_probe, 414 .remove = uclogic_remove, 415 .report_fixup = uclogic_report_fixup, 416 .raw_event = uclogic_raw_event, 417 .input_mapping = uclogic_input_mapping, 418 .input_configured = uclogic_input_configured, 419#ifdef CONFIG_PM 420 .resume = uclogic_resume, 421 .reset_resume = uclogic_resume, 422#endif 423}; 424module_hid_driver(uclogic_driver); 425 426MODULE_AUTHOR("Martin Rusko"); 427MODULE_AUTHOR("Nikolai Kondrashov"); 428MODULE_LICENSE("GPL"); 429