drivers/hid/hid-uclogic-core.c

   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                 *rsize = drvdata->desc_size;
  60                 return drvdata->desc_ptr;
  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 = &params->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(&params, hdev);
 236         if (rc != 0)
 237                 hid_err(hdev, "failed to re-initialize the device\n");
 238         else
 239                 uclogic_params_cleanup(&params);
 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, &params->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