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 */
uclogic_inrange_timeout(struct timer_list * t)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
uclogic_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * rsize)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
uclogic_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)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
uclogic_input_configured(struct hid_device * hdev,struct hid_input * hi)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
uclogic_probe(struct hid_device * hdev,const struct hid_device_id * id)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
uclogic_resume(struct hid_device * hdev)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 */
uclogic_exec_event_hook(struct uclogic_params * p,u8 * event,int size)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 */
uclogic_raw_event_pen(struct uclogic_drvdata * drvdata,u8 * data,int size)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 */
uclogic_raw_event_frame(struct uclogic_drvdata * drvdata,const struct uclogic_params_frame * frame,u8 * data,int size)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
uclogic_raw_event(struct hid_device * hdev,struct hid_report * report,u8 * data,int size)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
uclogic_remove(struct hid_device * hdev)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