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 */ 26 struct 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 */ 52 static 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 72 static __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 84 static 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 } 101 102 static 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 } 159 160 static 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 /* 168 * libinput requires the pad interface to be on a different node 169 * than the pen, so use QUIRK_MULTI_INPUT for all tablets. 170 */ 171 hdev->quirks |= HID_QUIRK_MULTI_INPUT; 172 173 /* Allocate and assign driver data */ 174 drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL); 175 if (drvdata == NULL) { 176 rc = -ENOMEM; 177 goto failure; 178 } 179 timer_setup(&drvdata->inrange_timer, uclogic_inrange_timeout, 0); 180 drvdata->re_state = U8_MAX; 181 hid_set_drvdata(hdev, drvdata); 182 183 /* Initialize the device and retrieve interface parameters */ 184 rc = uclogic_params_init(&drvdata->params, hdev); 185 if (rc != 0) { 186 hid_err(hdev, "failed probing parameters: %d\n", rc); 187 goto failure; 188 } 189 params_initialized = true; 190 hid_dbg(hdev, "parameters:\n" UCLOGIC_PARAMS_FMT_STR, 191 UCLOGIC_PARAMS_FMT_ARGS(&drvdata->params)); 192 if (drvdata->params.invalid) { 193 hid_info(hdev, "interface is invalid, ignoring\n"); 194 rc = -ENODEV; 195 goto failure; 196 } 197 198 /* Generate replacement report descriptor */ 199 rc = uclogic_params_get_desc(&drvdata->params, 200 &drvdata->desc_ptr, 201 &drvdata->desc_size); 202 if (rc) { 203 hid_err(hdev, 204 "failed generating replacement report descriptor: %d\n", 205 rc); 206 goto failure; 207 } 208 209 rc = hid_parse(hdev); 210 if (rc) { 211 hid_err(hdev, "parse failed\n"); 212 goto failure; 213 } 214 215 rc = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 216 if (rc) { 217 hid_err(hdev, "hw start failed\n"); 218 goto failure; 219 } 220 221 return 0; 222 failure: 223 /* Assume "remove" might not be called if "probe" failed */ 224 if (params_initialized) 225 uclogic_params_cleanup(&drvdata->params); 226 return rc; 227 } 228 229 #ifdef CONFIG_PM 230 static int uclogic_resume(struct hid_device *hdev) 231 { 232 int rc; 233 struct uclogic_params params; 234 235 /* Re-initialize the device, but discard parameters */ 236 rc = uclogic_params_init(¶ms, hdev); 237 if (rc != 0) 238 hid_err(hdev, "failed to re-initialize the device\n"); 239 else 240 uclogic_params_cleanup(¶ms); 241 242 return rc; 243 } 244 #endif 245 246 static int uclogic_raw_event(struct hid_device *hdev, 247 struct hid_report *report, 248 u8 *data, int size) 249 { 250 struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); 251 struct uclogic_params *params = &drvdata->params; 252 253 /* Tweak pen reports, if necessary */ 254 if (!params->pen_unused && 255 (report->type == HID_INPUT_REPORT) && 256 (report->id == params->pen.id) && 257 (size >= 2)) { 258 /* If it's the "virtual" frame controls report */ 259 if (params->frame.id != 0 && 260 data[1] & params->pen_frame_flag) { 261 /* Change to virtual frame controls report ID */ 262 data[0] = params->frame.id; 263 return 0; 264 } 265 /* If in-range reports are inverted */ 266 if (params->pen.inrange == 267 UCLOGIC_PARAMS_PEN_INRANGE_INVERTED) { 268 /* Invert the in-range bit */ 269 data[1] ^= 0x40; 270 } 271 /* 272 * If report contains fragmented high-resolution pen 273 * coordinates 274 */ 275 if (size >= 10 && params->pen.fragmented_hires) { 276 u8 pressure_low_byte; 277 u8 pressure_high_byte; 278 279 /* Lift pressure bytes */ 280 pressure_low_byte = data[6]; 281 pressure_high_byte = data[7]; 282 /* 283 * Move Y coord to make space for high-order X 284 * coord byte 285 */ 286 data[6] = data[5]; 287 data[5] = data[4]; 288 /* Move high-order X coord byte */ 289 data[4] = data[8]; 290 /* Move high-order Y coord byte */ 291 data[7] = data[9]; 292 /* Place pressure bytes */ 293 data[8] = pressure_low_byte; 294 data[9] = pressure_high_byte; 295 } 296 /* If we need to emulate in-range detection */ 297 if (params->pen.inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE) { 298 /* Set in-range bit */ 299 data[1] |= 0x40; 300 /* (Re-)start in-range timeout */ 301 mod_timer(&drvdata->inrange_timer, 302 jiffies + msecs_to_jiffies(100)); 303 } 304 } 305 306 /* Tweak frame control reports, if necessary */ 307 if ((report->type == HID_INPUT_REPORT) && 308 (report->id == params->frame.id)) { 309 /* If need to, and can, set pad device ID for Wacom drivers */ 310 if (params->frame.dev_id_byte > 0 && 311 params->frame.dev_id_byte < size) { 312 data[params->frame.dev_id_byte] = 0xf; 313 } 314 /* If need to, and can, read rotary encoder state change */ 315 if (params->frame.re_lsb > 0 && 316 params->frame.re_lsb / 8 < size) { 317 unsigned int byte = params->frame.re_lsb / 8; 318 unsigned int bit = params->frame.re_lsb % 8; 319 320 u8 change; 321 u8 prev_state = drvdata->re_state; 322 /* Read Gray-coded state */ 323 u8 state = (data[byte] >> bit) & 0x3; 324 /* Encode state change into 2-bit signed integer */ 325 if ((prev_state == 1 && state == 0) || 326 (prev_state == 2 && state == 3)) { 327 change = 1; 328 } else if ((prev_state == 2 && state == 0) || 329 (prev_state == 1 && state == 3)) { 330 change = 3; 331 } else { 332 change = 0; 333 } 334 /* Write change */ 335 data[byte] = (data[byte] & ~((u8)3 << bit)) | 336 (change << bit); 337 /* Remember state */ 338 drvdata->re_state = state; 339 } 340 } 341 342 return 0; 343 } 344 345 static void uclogic_remove(struct hid_device *hdev) 346 { 347 struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); 348 349 del_timer_sync(&drvdata->inrange_timer); 350 hid_hw_stop(hdev); 351 kfree(drvdata->desc_ptr); 352 uclogic_params_cleanup(&drvdata->params); 353 } 354 355 static const struct hid_device_id uclogic_devices[] = { 356 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 357 USB_DEVICE_ID_UCLOGIC_TABLET_PF1209) }, 358 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 359 USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U) }, 360 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 361 USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U) }, 362 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 363 USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U) }, 364 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 365 USB_DEVICE_ID_UCLOGIC_TABLET_WP1062) }, 366 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 367 USB_DEVICE_ID_UCLOGIC_WIRELESS_TABLET_TWHL850) }, 368 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 369 USB_DEVICE_ID_UCLOGIC_TABLET_TWHA60) }, 370 { HID_USB_DEVICE(USB_VENDOR_ID_HUION, 371 USB_DEVICE_ID_HUION_TABLET) }, 372 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 373 USB_DEVICE_ID_HUION_TABLET) }, 374 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 375 USB_DEVICE_ID_YIYNOVA_TABLET) }, 376 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 377 USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_81) }, 378 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 379 USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_45) }, 380 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 381 USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_47) }, 382 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, 383 USB_DEVICE_ID_UCLOGIC_DRAWIMAGE_G3) }, 384 { HID_USB_DEVICE(USB_VENDOR_ID_UGTIZER, 385 USB_DEVICE_ID_UGTIZER_TABLET_GP0610) }, 386 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 387 USB_DEVICE_ID_UGEE_TABLET_G5) }, 388 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 389 USB_DEVICE_ID_UGEE_TABLET_EX07S) }, 390 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 391 USB_DEVICE_ID_UGEE_XPPEN_TABLET_G540) }, 392 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 393 USB_DEVICE_ID_UGEE_XPPEN_TABLET_G640) }, 394 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, 395 USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01) }, 396 { } 397 }; 398 MODULE_DEVICE_TABLE(hid, uclogic_devices); 399 400 static struct hid_driver uclogic_driver = { 401 .name = "uclogic", 402 .id_table = uclogic_devices, 403 .probe = uclogic_probe, 404 .remove = uclogic_remove, 405 .report_fixup = uclogic_report_fixup, 406 .raw_event = uclogic_raw_event, 407 .input_mapping = uclogic_input_mapping, 408 .input_configured = uclogic_input_configured, 409 #ifdef CONFIG_PM 410 .resume = uclogic_resume, 411 .reset_resume = uclogic_resume, 412 #endif 413 }; 414 module_hid_driver(uclogic_driver); 415 416 MODULE_AUTHOR("Martin Rusko"); 417 MODULE_AUTHOR("Nikolai Kondrashov"); 418 MODULE_LICENSE("GPL"); 419