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 /** 26 * uclogic_inrange_timeout - handle pen in-range state timeout. 27 * Emulate input events normally generated when pen goes out of range for 28 * tablets which don't report that. 29 * 30 * @t: The timer the timeout handler is attached to, stored in a struct 31 * uclogic_drvdata. 32 */ 33 static void uclogic_inrange_timeout(struct timer_list *t) 34 { 35 struct uclogic_drvdata *drvdata = from_timer(drvdata, t, 36 inrange_timer); 37 struct input_dev *input = drvdata->pen_input; 38 39 if (input == NULL) 40 return; 41 input_report_abs(input, ABS_PRESSURE, 0); 42 /* If BTN_TOUCH state is changing */ 43 if (test_bit(BTN_TOUCH, input->key)) { 44 input_event(input, EV_MSC, MSC_SCAN, 45 /* Digitizer Tip Switch usage */ 46 0xd0042); 47 input_report_key(input, BTN_TOUCH, 0); 48 } 49 input_report_key(input, BTN_TOOL_PEN, 0); 50 input_sync(input); 51 } 52 53 static const __u8 *uclogic_report_fixup(struct hid_device *hdev, __u8 *rdesc, 54 unsigned int *rsize) 55 { 56 struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); 57 58 if (drvdata->desc_ptr != NULL) { 59 rdesc = drvdata->desc_ptr; 60 *rsize = drvdata->desc_size; 61 } 62 return rdesc; 63 } 64 65 static int uclogic_input_mapping(struct hid_device *hdev, 66 struct hid_input *hi, 67 struct hid_field *field, 68 struct hid_usage *usage, 69 unsigned long **bit, 70 int *max) 71 { 72 struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); 73 struct uclogic_params *params = &drvdata->params; 74 75 /* Discard invalid pen usages */ 76 if (params->pen.usage_invalid && (field->application == HID_DG_PEN)) 77 return -1; 78 79 /* Let hid-core decide what to do */ 80 return 0; 81 } 82 83 static int uclogic_input_configured(struct hid_device *hdev, 84 struct hid_input *hi) 85 { 86 struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); 87 struct uclogic_params *params = &drvdata->params; 88 const char *suffix = NULL; 89 struct hid_field *field; 90 size_t i; 91 const struct uclogic_params_frame *frame; 92 93 /* no report associated (HID_QUIRK_MULTI_INPUT not set) */ 94 if (!hi->report) 95 return 0; 96 97 /* 98 * If this is the input corresponding to the pen report 99 * in need of tweaking. 100 */ 101 if (hi->report->id == params->pen.id) { 102 /* Remember the input device so we can simulate events */ 103 drvdata->pen_input = hi->input; 104 } 105 106 /* If it's one of the frame devices */ 107 for (i = 0; i < ARRAY_SIZE(params->frame_list); i++) { 108 frame = ¶ms->frame_list[i]; 109 if (hi->report->id == frame->id) { 110 /* Assign custom suffix, if any */ 111 suffix = frame->suffix; 112 /* 113 * Disable EV_MSC reports for touch ring interfaces to 114 * make the Wacom driver pickup touch ring extents 115 */ 116 if (frame->touch_byte > 0) 117 __clear_bit(EV_MSC, hi->input->evbit); 118 } 119 } 120 121 if (!suffix) { 122 field = hi->report->field[0]; 123 124 switch (field->application) { 125 case HID_GD_KEYBOARD: 126 suffix = "Keyboard"; 127 break; 128 case HID_GD_MOUSE: 129 suffix = "Mouse"; 130 break; 131 case HID_GD_KEYPAD: 132 suffix = "Pad"; 133 break; 134 case HID_DG_PEN: 135 case HID_DG_DIGITIZER: 136 suffix = "Pen"; 137 break; 138 case HID_CP_CONSUMER_CONTROL: 139 suffix = "Consumer Control"; 140 break; 141 case HID_GD_SYSTEM_CONTROL: 142 suffix = "System Control"; 143 break; 144 } 145 } 146 147 if (suffix) 148 hi->input->name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 149 "%s %s", hdev->name, suffix); 150 151 return 0; 152 } 153 154 static int uclogic_probe(struct hid_device *hdev, 155 const struct hid_device_id *id) 156 { 157 int rc; 158 struct uclogic_drvdata *drvdata = NULL; 159 bool params_initialized = false; 160 161 if (!hid_is_usb(hdev)) 162 return -EINVAL; 163 164 /* 165 * libinput requires the pad interface to be on a different node 166 * than the pen, so use QUIRK_MULTI_INPUT for all tablets. 167 */ 168 hdev->quirks |= HID_QUIRK_MULTI_INPUT; 169 hdev->quirks |= HID_QUIRK_HIDINPUT_FORCE; 170 171 /* Allocate and assign driver data */ 172 drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL); 173 if (drvdata == NULL) { 174 rc = -ENOMEM; 175 goto failure; 176 } 177 timer_setup(&drvdata->inrange_timer, uclogic_inrange_timeout, 0); 178 drvdata->re_state = U8_MAX; 179 drvdata->quirks = id->driver_data; 180 hid_set_drvdata(hdev, drvdata); 181 182 /* Initialize the device and retrieve interface parameters */ 183 rc = uclogic_params_init(&drvdata->params, hdev); 184 if (rc != 0) { 185 hid_err(hdev, "failed probing parameters: %d\n", rc); 186 goto failure; 187 } 188 params_initialized = true; 189 hid_dbg(hdev, "parameters:\n"); 190 uclogic_params_hid_dbg(hdev, &drvdata->params); 191 if (drvdata->params.invalid) { 192 hid_info(hdev, "interface is invalid, ignoring\n"); 193 rc = -ENODEV; 194 goto failure; 195 } 196 197 /* Generate replacement report descriptor */ 198 rc = uclogic_params_get_desc(&drvdata->params, 199 &drvdata->desc_ptr, 200 &drvdata->desc_size); 201 if (rc) { 202 hid_err(hdev, 203 "failed generating replacement report descriptor: %d\n", 204 rc); 205 goto failure; 206 } 207 208 rc = hid_parse(hdev); 209 if (rc) { 210 hid_err(hdev, "parse failed\n"); 211 goto failure; 212 } 213 214 rc = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 215 if (rc) { 216 hid_err(hdev, "hw start failed\n"); 217 goto failure; 218 } 219 220 return 0; 221 failure: 222 /* Assume "remove" might not be called if "probe" failed */ 223 if (params_initialized) 224 uclogic_params_cleanup(&drvdata->params); 225 return rc; 226 } 227 228 #ifdef CONFIG_PM 229 static int uclogic_resume(struct hid_device *hdev) 230 { 231 int rc; 232 struct uclogic_params params; 233 234 /* Re-initialize the device, but discard parameters */ 235 rc = uclogic_params_init(¶ms, hdev); 236 if (rc != 0) 237 hid_err(hdev, "failed to re-initialize the device\n"); 238 else 239 uclogic_params_cleanup(¶ms); 240 241 return rc; 242 } 243 #endif 244 245 /** 246 * uclogic_exec_event_hook - if the received event is hooked schedules the 247 * associated work. 248 * 249 * @p: Tablet interface report parameters. 250 * @event: Raw event. 251 * @size: The size of event. 252 * 253 * Returns: 254 * Whether the event was hooked or not. 255 */ 256 static bool uclogic_exec_event_hook(struct uclogic_params *p, u8 *event, int size) 257 { 258 struct uclogic_raw_event_hook *curr; 259 260 if (!p->event_hooks) 261 return false; 262 263 list_for_each_entry(curr, &p->event_hooks->list, list) { 264 if (curr->size == size && memcmp(curr->event, event, size) == 0) { 265 schedule_work(&curr->work); 266 return true; 267 } 268 } 269 270 return false; 271 } 272 273 /** 274 * uclogic_raw_event_pen - handle raw pen events (pen HID reports). 275 * 276 * @drvdata: Driver data. 277 * @data: Report data buffer, can be modified. 278 * @size: Report data size, bytes. 279 * 280 * Returns: 281 * Negative value on error (stops event delivery), zero for success. 282 */ 283 static int uclogic_raw_event_pen(struct uclogic_drvdata *drvdata, 284 u8 *data, int size) 285 { 286 struct uclogic_params_pen *pen = &drvdata->params.pen; 287 288 WARN_ON(drvdata == NULL); 289 WARN_ON(data == NULL && size != 0); 290 291 /* If in-range reports are inverted */ 292 if (pen->inrange == 293 UCLOGIC_PARAMS_PEN_INRANGE_INVERTED) { 294 /* Invert the in-range bit */ 295 data[1] ^= 0x40; 296 } 297 /* 298 * If report contains fragmented high-resolution pen 299 * coordinates 300 */ 301 if (size >= 10 && pen->fragmented_hires) { 302 u8 pressure_low_byte; 303 u8 pressure_high_byte; 304 305 /* Lift pressure bytes */ 306 pressure_low_byte = data[6]; 307 pressure_high_byte = data[7]; 308 /* 309 * Move Y coord to make space for high-order X 310 * coord byte 311 */ 312 data[6] = data[5]; 313 data[5] = data[4]; 314 /* Move high-order X coord byte */ 315 data[4] = data[8]; 316 /* Move high-order Y coord byte */ 317 data[7] = data[9]; 318 /* Place pressure bytes */ 319 data[8] = pressure_low_byte; 320 data[9] = pressure_high_byte; 321 } 322 /* If we need to emulate in-range detection */ 323 if (pen->inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE) { 324 /* Set in-range bit */ 325 data[1] |= 0x40; 326 /* (Re-)start in-range timeout */ 327 mod_timer(&drvdata->inrange_timer, 328 jiffies + msecs_to_jiffies(100)); 329 } 330 /* If we report tilt and Y direction is flipped */ 331 if (size >= 12 && pen->tilt_y_flipped) 332 data[11] = -data[11]; 333 334 return 0; 335 } 336 337 /** 338 * uclogic_raw_event_frame - handle raw frame events (frame HID reports). 339 * 340 * @drvdata: Driver data. 341 * @frame: The parameters of the frame controls to handle. 342 * @data: Report data buffer, can be modified. 343 * @size: Report data size, bytes. 344 * 345 * Returns: 346 * Negative value on error (stops event delivery), zero for success. 347 */ 348 static int uclogic_raw_event_frame( 349 struct uclogic_drvdata *drvdata, 350 const struct uclogic_params_frame *frame, 351 u8 *data, int size) 352 { 353 WARN_ON(drvdata == NULL); 354 WARN_ON(data == NULL && size != 0); 355 356 /* If need to, and can, set pad device ID for Wacom drivers */ 357 if (frame->dev_id_byte > 0 && frame->dev_id_byte < size) { 358 /* If we also have a touch ring and the finger left it */ 359 if (frame->touch_byte > 0 && frame->touch_byte < size && 360 data[frame->touch_byte] == 0) { 361 data[frame->dev_id_byte] = 0; 362 } else { 363 data[frame->dev_id_byte] = 0xf; 364 } 365 } 366 367 /* If need to, and can, read rotary encoder state change */ 368 if (frame->re_lsb > 0 && frame->re_lsb / 8 < size) { 369 unsigned int byte = frame->re_lsb / 8; 370 unsigned int bit = frame->re_lsb % 8; 371 372 u8 change; 373 u8 prev_state = drvdata->re_state; 374 /* Read Gray-coded state */ 375 u8 state = (data[byte] >> bit) & 0x3; 376 /* Encode state change into 2-bit signed integer */ 377 if ((prev_state == 1 && state == 0) || 378 (prev_state == 2 && state == 3)) { 379 change = 1; 380 } else if ((prev_state == 2 && state == 0) || 381 (prev_state == 1 && state == 3)) { 382 change = 3; 383 } else { 384 change = 0; 385 } 386 /* Write change */ 387 data[byte] = (data[byte] & ~((u8)3 << bit)) | 388 (change << bit); 389 /* Remember state */ 390 drvdata->re_state = state; 391 } 392 393 /* If need to, and can, transform the touch ring reports */ 394 if (frame->touch_byte > 0 && frame->touch_byte < size) { 395 __s8 value = data[frame->touch_byte]; 396 397 if (value != 0) { 398 if (frame->touch_flip_at != 0) { 399 value = frame->touch_flip_at - value; 400 if (value <= 0) 401 value = frame->touch_max + value; 402 } 403 data[frame->touch_byte] = value - 1; 404 } 405 } 406 407 /* If need to, and can, transform the bitmap dial reports */ 408 if (frame->bitmap_dial_byte > 0 && frame->bitmap_dial_byte < size) { 409 if (data[frame->bitmap_dial_byte] == 2) 410 data[frame->bitmap_dial_byte] = -1; 411 } 412 413 return 0; 414 } 415 416 static int uclogic_raw_event(struct hid_device *hdev, 417 struct hid_report *report, 418 u8 *data, int size) 419 { 420 unsigned int report_id = report->id; 421 struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); 422 struct uclogic_params *params = &drvdata->params; 423 struct uclogic_params_pen_subreport *subreport; 424 struct uclogic_params_pen_subreport *subreport_list_end; 425 size_t i; 426 427 /* Do not handle anything but input reports */ 428 if (report->type != HID_INPUT_REPORT) 429 return 0; 430 431 if (uclogic_exec_event_hook(params, data, size)) 432 return 0; 433 434 while (true) { 435 /* Tweak pen reports, if necessary */ 436 if ((report_id == params->pen.id) && (size >= 2)) { 437 subreport_list_end = 438 params->pen.subreport_list + 439 ARRAY_SIZE(params->pen.subreport_list); 440 /* Try to match a subreport */ 441 for (subreport = params->pen.subreport_list; 442 subreport < subreport_list_end; subreport++) { 443 if (subreport->value != 0 && 444 subreport->value == data[1]) { 445 break; 446 } 447 } 448 /* If a subreport matched */ 449 if (subreport < subreport_list_end) { 450 /* Change to subreport ID, and restart */ 451 report_id = data[0] = subreport->id; 452 continue; 453 } else { 454 return uclogic_raw_event_pen(drvdata, data, size); 455 } 456 } 457 458 /* Tweak frame control reports, if necessary */ 459 for (i = 0; i < ARRAY_SIZE(params->frame_list); i++) { 460 if (report_id == params->frame_list[i].id) { 461 return uclogic_raw_event_frame( 462 drvdata, ¶ms->frame_list[i], 463 data, size); 464 } 465 } 466 467 break; 468 } 469 470 return 0; 471 } 472 473 static void uclogic_remove(struct hid_device *hdev) 474 { 475 struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); 476 477 del_timer_sync(&drvdata->inrange_timer); 478 hid_hw_stop(hdev); 479 kfree(drvdata->desc_ptr); 480 uclogic_params_cleanup(&drvdata->params); 481 } 482 483 static const struct hid_device_id uclogic_devices[] = { 484 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 485 USB_DEVICE_ID_UCLOGIC_TABLET_PF1209) }, 486 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 487 USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U) }, 488 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 489 USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U) }, 490 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 491 USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U) }, 492 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 493 USB_DEVICE_ID_UCLOGIC_TABLET_WP1062) }, 494 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 495 USB_DEVICE_ID_UCLOGIC_WIRELESS_TABLET_TWHL850) }, 496 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 497 USB_DEVICE_ID_UCLOGIC_TABLET_TWHA60) }, 498 { HID_USB_DEVICE(USB_VENDOR_ID_HUION, 499 USB_DEVICE_ID_HUION_TABLET) }, 500 { HID_USB_DEVICE(USB_VENDOR_ID_HUION, 501 USB_DEVICE_ID_HUION_TABLET2) }, 502 { HID_USB_DEVICE(USB_VENDOR_ID_TRUST, 503 USB_DEVICE_ID_TRUST_PANORA_TABLET) }, 504 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 505 USB_DEVICE_ID_HUION_TABLET) }, 506 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 507 USB_DEVICE_ID_YIYNOVA_TABLET) }, 508 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 509 USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_81) }, 510 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 511 USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_45) }, 512 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 513 USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_47) }, 514 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 515 USB_DEVICE_ID_UCLOGIC_DRAWIMAGE_G3) }, 516 { HID_USB_DEVICE(USB_VENDOR_ID_UGTIZER, 517 USB_DEVICE_ID_UGTIZER_TABLET_GP0610) }, 518 { HID_USB_DEVICE(USB_VENDOR_ID_UGTIZER, 519 USB_DEVICE_ID_UGTIZER_TABLET_GT5040) }, 520 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 521 USB_DEVICE_ID_UGEE_PARBLO_A610_PRO) }, 522 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 523 USB_DEVICE_ID_UGEE_TABLET_G5) }, 524 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 525 USB_DEVICE_ID_UGEE_TABLET_EX07S) }, 526 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 527 USB_DEVICE_ID_UGEE_TABLET_RAINBOW_CV720) }, 528 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 529 USB_DEVICE_ID_UGEE_XPPEN_TABLET_G540) }, 530 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 531 USB_DEVICE_ID_UGEE_XPPEN_TABLET_G640) }, 532 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 533 USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01) }, 534 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 535 USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01_V2) }, 536 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 537 USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L) }, 538 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 539 USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW), 540 .driver_data = UCLOGIC_MOUSE_FRAME_QUIRK | UCLOGIC_BATTERY_QUIRK }, 541 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 542 USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_S) }, 543 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 544 USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW), 545 .driver_data = UCLOGIC_MOUSE_FRAME_QUIRK | UCLOGIC_BATTERY_QUIRK }, 546 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 547 USB_DEVICE_ID_UGEE_XPPEN_TABLET_STAR06) }, 548 { } 549 }; 550 MODULE_DEVICE_TABLE(hid, uclogic_devices); 551 552 static struct hid_driver uclogic_driver = { 553 .name = "uclogic", 554 .id_table = uclogic_devices, 555 .probe = uclogic_probe, 556 .remove = uclogic_remove, 557 .report_fixup = uclogic_report_fixup, 558 .raw_event = uclogic_raw_event, 559 .input_mapping = uclogic_input_mapping, 560 .input_configured = uclogic_input_configured, 561 #ifdef CONFIG_PM 562 .resume = uclogic_resume, 563 .reset_resume = uclogic_resume, 564 #endif 565 }; 566 module_hid_driver(uclogic_driver); 567 568 MODULE_AUTHOR("Martin Rusko"); 569 MODULE_AUTHOR("Nikolai Kondrashov"); 570 MODULE_DESCRIPTION("HID driver for UC-Logic devices not fully compliant with HID standard"); 571 MODULE_LICENSE("GPL"); 572 MODULE_DESCRIPTION("HID driver for UC-Logic devices not fully compliant with HID standard"); 573 574 #ifdef CONFIG_HID_KUNIT_TEST 575 #include "hid-uclogic-core-test.c" 576 #endif 577