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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 */
33static 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
53static __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
65static 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
83static 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
154static 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;
221failure:
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
229static 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 */
256static 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 */
283static 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 */
348static 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
416static 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
473static 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
483static 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};
550MODULE_DEVICE_TABLE(hid, uclogic_devices);
551
552static 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};
566module_hid_driver(uclogic_driver);
567
568MODULE_AUTHOR("Martin Rusko");
569MODULE_AUTHOR("Nikolai Kondrashov");
570MODULE_LICENSE("GPL");
571
572#ifdef CONFIG_HID_KUNIT_TEST
573#include "hid-uclogic-core-test.c"
574#endif
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 /*
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;
222failure:
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
230static 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
246static 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
345static 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
355static 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_HUION,
373 USB_DEVICE_ID_HUION_HS64) },
374 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
375 USB_DEVICE_ID_HUION_TABLET) },
376 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
377 USB_DEVICE_ID_YIYNOVA_TABLET) },
378 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
379 USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_81) },
380 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
381 USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_45) },
382 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
383 USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_47) },
384 { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC,
385 USB_DEVICE_ID_UCLOGIC_DRAWIMAGE_G3) },
386 { HID_USB_DEVICE(USB_VENDOR_ID_UGTIZER,
387 USB_DEVICE_ID_UGTIZER_TABLET_GP0610) },
388 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
389 USB_DEVICE_ID_UGEE_TABLET_G5) },
390 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
391 USB_DEVICE_ID_UGEE_TABLET_EX07S) },
392 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
393 USB_DEVICE_ID_UGEE_TABLET_RAINBOW_CV720) },
394 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
395 USB_DEVICE_ID_UGEE_XPPEN_TABLET_G540) },
396 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
397 USB_DEVICE_ID_UGEE_XPPEN_TABLET_G640) },
398 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE,
399 USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01) },
400 { }
401};
402MODULE_DEVICE_TABLE(hid, uclogic_devices);
403
404static struct hid_driver uclogic_driver = {
405 .name = "uclogic",
406 .id_table = uclogic_devices,
407 .probe = uclogic_probe,
408 .remove = uclogic_remove,
409 .report_fixup = uclogic_report_fixup,
410 .raw_event = uclogic_raw_event,
411 .input_mapping = uclogic_input_mapping,
412 .input_configured = uclogic_input_configured,
413#ifdef CONFIG_PM
414 .resume = uclogic_resume,
415 .reset_resume = uclogic_resume,
416#endif
417};
418module_hid_driver(uclogic_driver);
419
420MODULE_AUTHOR("Martin Rusko");
421MODULE_AUTHOR("Nikolai Kondrashov");
422MODULE_LICENSE("GPL");