1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * HID driver for Waltop devices not fully compliant with HID standard
4 *
5 * Copyright (c) 2010 Nikolai Kondrashov
6 */
7
8 /*
9 */
10
11 #include <linux/device.h>
12 #include <linux/hid.h>
13 #include <linux/module.h>
14
15 #include "hid-ids.h"
16
17 /*
18 * There exists an official driver on the manufacturer's website, which
19 * wasn't submitted to the kernel, for some reason. The official driver
20 * doesn't seem to support extra features of some tablets, like wheels.
21 *
22 * It shows that the feature report ID 2 could be used to control any waltop
23 * tablet input mode, switching it between "default", "tablet" and "ink".
24 *
25 * This driver only uses "default" mode for all the supported tablets. This
26 * mode tries to be HID-compatible (not very successfully), but cripples the
27 * resolution of some tablets.
28 *
29 * The "tablet" mode uses some proprietary, yet decipherable protocol, which
30 * represents the correct resolution, but is possibly HID-incompatible (i.e.
31 * indescribable by a report descriptor).
32 *
33 * The purpose of the "ink" mode is unknown.
34 *
35 * The feature reports needed for switching to each mode are these:
36 *
37 * 02 16 00 default
38 * 02 16 01 tablet
39 * 02 16 02 ink
40 */
41
42 /* Size of the original report descriptor of Slim Tablet 5.8 inch */
43 #define SLIM_TABLET_5_8_INCH_RDESC_ORIG_SIZE 222
44
45 /* Fixed Slim Tablet 5.8 inch descriptor */
46 static __u8 slim_tablet_5_8_inch_rdesc_fixed[] = {
47 0x05, 0x0D, /* Usage Page (Digitizer), */
48 0x09, 0x02, /* Usage (Pen), */
49 0xA1, 0x01, /* Collection (Application), */
50 0x85, 0x10, /* Report ID (16), */
51 0x09, 0x20, /* Usage (Stylus), */
52 0xA0, /* Collection (Physical), */
53 0x09, 0x42, /* Usage (Tip Switch), */
54 0x09, 0x44, /* Usage (Barrel Switch), */
55 0x09, 0x46, /* Usage (Tablet Pick), */
56 0x15, 0x01, /* Logical Minimum (1), */
57 0x25, 0x03, /* Logical Maximum (3), */
58 0x75, 0x04, /* Report Size (4), */
59 0x95, 0x01, /* Report Count (1), */
60 0x80, /* Input, */
61 0x09, 0x32, /* Usage (In Range), */
62 0x14, /* Logical Minimum (0), */
63 0x25, 0x01, /* Logical Maximum (1), */
64 0x75, 0x01, /* Report Size (1), */
65 0x95, 0x01, /* Report Count (1), */
66 0x81, 0x02, /* Input (Variable), */
67 0x95, 0x03, /* Report Count (3), */
68 0x81, 0x03, /* Input (Constant, Variable), */
69 0x75, 0x10, /* Report Size (16), */
70 0x95, 0x01, /* Report Count (1), */
71 0x14, /* Logical Minimum (0), */
72 0xA4, /* Push, */
73 0x05, 0x01, /* Usage Page (Desktop), */
74 0x65, 0x13, /* Unit (Inch), */
75 0x55, 0xFD, /* Unit Exponent (-3), */
76 0x34, /* Physical Minimum (0), */
77 0x09, 0x30, /* Usage (X), */
78 0x46, 0x88, 0x13, /* Physical Maximum (5000), */
79 0x26, 0x10, 0x27, /* Logical Maximum (10000), */
80 0x81, 0x02, /* Input (Variable), */
81 0x09, 0x31, /* Usage (Y), */
82 0x46, 0xB8, 0x0B, /* Physical Maximum (3000), */
83 0x26, 0x70, 0x17, /* Logical Maximum (6000), */
84 0x81, 0x02, /* Input (Variable), */
85 0xB4, /* Pop, */
86 0x09, 0x30, /* Usage (Tip Pressure), */
87 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
88 0x81, 0x02, /* Input (Variable), */
89 0xC0, /* End Collection, */
90 0xC0 /* End Collection */
91 };
92
93 /* Size of the original report descriptor of Slim Tablet 12.1 inch */
94 #define SLIM_TABLET_12_1_INCH_RDESC_ORIG_SIZE 269
95
96 /* Fixed Slim Tablet 12.1 inch descriptor */
97 static __u8 slim_tablet_12_1_inch_rdesc_fixed[] = {
98 0x05, 0x0D, /* Usage Page (Digitizer), */
99 0x09, 0x02, /* Usage (Pen), */
100 0xA1, 0x01, /* Collection (Application), */
101 0x85, 0x10, /* Report ID (16), */
102 0x09, 0x20, /* Usage (Stylus), */
103 0xA0, /* Collection (Physical), */
104 0x09, 0x42, /* Usage (Tip Switch), */
105 0x09, 0x44, /* Usage (Barrel Switch), */
106 0x09, 0x46, /* Usage (Tablet Pick), */
107 0x15, 0x01, /* Logical Minimum (1), */
108 0x25, 0x03, /* Logical Maximum (3), */
109 0x75, 0x04, /* Report Size (4), */
110 0x95, 0x01, /* Report Count (1), */
111 0x80, /* Input, */
112 0x09, 0x32, /* Usage (In Range), */
113 0x14, /* Logical Minimum (0), */
114 0x25, 0x01, /* Logical Maximum (1), */
115 0x75, 0x01, /* Report Size (1), */
116 0x95, 0x01, /* Report Count (1), */
117 0x81, 0x02, /* Input (Variable), */
118 0x95, 0x03, /* Report Count (3), */
119 0x81, 0x03, /* Input (Constant, Variable), */
120 0x75, 0x10, /* Report Size (16), */
121 0x95, 0x01, /* Report Count (1), */
122 0x14, /* Logical Minimum (0), */
123 0xA4, /* Push, */
124 0x05, 0x01, /* Usage Page (Desktop), */
125 0x65, 0x13, /* Unit (Inch), */
126 0x55, 0xFD, /* Unit Exponent (-3), */
127 0x34, /* Physical Minimum (0), */
128 0x09, 0x30, /* Usage (X), */
129 0x46, 0x10, 0x27, /* Physical Maximum (10000), */
130 0x26, 0x20, 0x4E, /* Logical Maximum (20000), */
131 0x81, 0x02, /* Input (Variable), */
132 0x09, 0x31, /* Usage (Y), */
133 0x46, 0x6A, 0x18, /* Physical Maximum (6250), */
134 0x26, 0xD4, 0x30, /* Logical Maximum (12500), */
135 0x81, 0x02, /* Input (Variable), */
136 0xB4, /* Pop, */
137 0x09, 0x30, /* Usage (Tip Pressure), */
138 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
139 0x81, 0x02, /* Input (Variable), */
140 0xC0, /* End Collection, */
141 0xC0 /* End Collection */
142 };
143
144 /* Size of the original report descriptor of Q Pad */
145 #define Q_PAD_RDESC_ORIG_SIZE 241
146
147 /* Fixed Q Pad descriptor */
148 static __u8 q_pad_rdesc_fixed[] = {
149 0x05, 0x0D, /* Usage Page (Digitizer), */
150 0x09, 0x02, /* Usage (Pen), */
151 0xA1, 0x01, /* Collection (Application), */
152 0x85, 0x10, /* Report ID (16), */
153 0x09, 0x20, /* Usage (Stylus), */
154 0xA0, /* Collection (Physical), */
155 0x09, 0x42, /* Usage (Tip Switch), */
156 0x09, 0x44, /* Usage (Barrel Switch), */
157 0x09, 0x46, /* Usage (Tablet Pick), */
158 0x15, 0x01, /* Logical Minimum (1), */
159 0x25, 0x03, /* Logical Maximum (3), */
160 0x75, 0x04, /* Report Size (4), */
161 0x95, 0x01, /* Report Count (1), */
162 0x80, /* Input, */
163 0x09, 0x32, /* Usage (In Range), */
164 0x14, /* Logical Minimum (0), */
165 0x25, 0x01, /* Logical Maximum (1), */
166 0x75, 0x01, /* Report Size (1), */
167 0x95, 0x01, /* Report Count (1), */
168 0x81, 0x02, /* Input (Variable), */
169 0x95, 0x03, /* Report Count (3), */
170 0x81, 0x03, /* Input (Constant, Variable), */
171 0x75, 0x10, /* Report Size (16), */
172 0x95, 0x01, /* Report Count (1), */
173 0x14, /* Logical Minimum (0), */
174 0xA4, /* Push, */
175 0x05, 0x01, /* Usage Page (Desktop), */
176 0x65, 0x13, /* Unit (Inch), */
177 0x55, 0xFD, /* Unit Exponent (-3), */
178 0x34, /* Physical Minimum (0), */
179 0x09, 0x30, /* Usage (X), */
180 0x46, 0x70, 0x17, /* Physical Maximum (6000), */
181 0x26, 0x00, 0x30, /* Logical Maximum (12288), */
182 0x81, 0x02, /* Input (Variable), */
183 0x09, 0x31, /* Usage (Y), */
184 0x46, 0x94, 0x11, /* Physical Maximum (4500), */
185 0x26, 0x00, 0x24, /* Logical Maximum (9216), */
186 0x81, 0x02, /* Input (Variable), */
187 0xB4, /* Pop, */
188 0x09, 0x30, /* Usage (Tip Pressure), */
189 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
190 0x81, 0x02, /* Input (Variable), */
191 0xC0, /* End Collection, */
192 0xC0 /* End Collection */
193 };
194
195 /* Size of the original report descriptor of tablet with PID 0038 */
196 #define PID_0038_RDESC_ORIG_SIZE 241
197
198 /*
199 * Fixed report descriptor for tablet with PID 0038.
200 */
201 static __u8 pid_0038_rdesc_fixed[] = {
202 0x05, 0x0D, /* Usage Page (Digitizer), */
203 0x09, 0x02, /* Usage (Pen), */
204 0xA1, 0x01, /* Collection (Application), */
205 0x85, 0x10, /* Report ID (16), */
206 0x09, 0x20, /* Usage (Stylus), */
207 0xA0, /* Collection (Physical), */
208 0x09, 0x42, /* Usage (Tip Switch), */
209 0x09, 0x44, /* Usage (Barrel Switch), */
210 0x09, 0x46, /* Usage (Tablet Pick), */
211 0x15, 0x01, /* Logical Minimum (1), */
212 0x25, 0x03, /* Logical Maximum (3), */
213 0x75, 0x04, /* Report Size (4), */
214 0x95, 0x01, /* Report Count (1), */
215 0x80, /* Input, */
216 0x09, 0x32, /* Usage (In Range), */
217 0x14, /* Logical Minimum (0), */
218 0x25, 0x01, /* Logical Maximum (1), */
219 0x75, 0x01, /* Report Size (1), */
220 0x95, 0x01, /* Report Count (1), */
221 0x81, 0x02, /* Input (Variable), */
222 0x95, 0x03, /* Report Count (3), */
223 0x81, 0x03, /* Input (Constant, Variable), */
224 0x75, 0x10, /* Report Size (16), */
225 0x95, 0x01, /* Report Count (1), */
226 0x14, /* Logical Minimum (0), */
227 0xA4, /* Push, */
228 0x05, 0x01, /* Usage Page (Desktop), */
229 0x65, 0x13, /* Unit (Inch), */
230 0x55, 0xFD, /* Unit Exponent (-3), */
231 0x34, /* Physical Minimum (0), */
232 0x09, 0x30, /* Usage (X), */
233 0x46, 0x2E, 0x22, /* Physical Maximum (8750), */
234 0x26, 0x00, 0x46, /* Logical Maximum (17920), */
235 0x81, 0x02, /* Input (Variable), */
236 0x09, 0x31, /* Usage (Y), */
237 0x46, 0x82, 0x14, /* Physical Maximum (5250), */
238 0x26, 0x00, 0x2A, /* Logical Maximum (10752), */
239 0x81, 0x02, /* Input (Variable), */
240 0xB4, /* Pop, */
241 0x09, 0x30, /* Usage (Tip Pressure), */
242 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
243 0x81, 0x02, /* Input (Variable), */
244 0xC0, /* End Collection, */
245 0xC0 /* End Collection */
246 };
247
248 /* Size of the original report descriptor of Media Tablet 10.6 inch */
249 #define MEDIA_TABLET_10_6_INCH_RDESC_ORIG_SIZE 300
250
251 /* Fixed Media Tablet 10.6 inch descriptor */
252 static __u8 media_tablet_10_6_inch_rdesc_fixed[] = {
253 0x05, 0x0D, /* Usage Page (Digitizer), */
254 0x09, 0x02, /* Usage (Pen), */
255 0xA1, 0x01, /* Collection (Application), */
256 0x85, 0x10, /* Report ID (16), */
257 0x09, 0x20, /* Usage (Stylus), */
258 0xA0, /* Collection (Physical), */
259 0x09, 0x42, /* Usage (Tip Switch), */
260 0x09, 0x44, /* Usage (Barrel Switch), */
261 0x09, 0x46, /* Usage (Tablet Pick), */
262 0x15, 0x01, /* Logical Minimum (1), */
263 0x25, 0x03, /* Logical Maximum (3), */
264 0x75, 0x04, /* Report Size (4), */
265 0x95, 0x01, /* Report Count (1), */
266 0x80, /* Input, */
267 0x75, 0x01, /* Report Size (1), */
268 0x09, 0x32, /* Usage (In Range), */
269 0x14, /* Logical Minimum (0), */
270 0x25, 0x01, /* Logical Maximum (1), */
271 0x95, 0x01, /* Report Count (1), */
272 0x81, 0x02, /* Input (Variable), */
273 0x95, 0x03, /* Report Count (3), */
274 0x81, 0x03, /* Input (Constant, Variable), */
275 0x75, 0x10, /* Report Size (16), */
276 0x95, 0x01, /* Report Count (1), */
277 0x14, /* Logical Minimum (0), */
278 0xA4, /* Push, */
279 0x05, 0x01, /* Usage Page (Desktop), */
280 0x65, 0x13, /* Unit (Inch), */
281 0x55, 0xFD, /* Unit Exponent (-3), */
282 0x34, /* Physical Minimum (0), */
283 0x09, 0x30, /* Usage (X), */
284 0x46, 0x28, 0x23, /* Physical Maximum (9000), */
285 0x26, 0x50, 0x46, /* Logical Maximum (18000), */
286 0x81, 0x02, /* Input (Variable), */
287 0x09, 0x31, /* Usage (Y), */
288 0x46, 0x7C, 0x15, /* Physical Maximum (5500), */
289 0x26, 0xF8, 0x2A, /* Logical Maximum (11000), */
290 0x81, 0x02, /* Input (Variable), */
291 0xB4, /* Pop, */
292 0x09, 0x30, /* Usage (Tip Pressure), */
293 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
294 0x81, 0x02, /* Input (Variable), */
295 0xC0, /* End Collection, */
296 0xC0, /* End Collection, */
297 0x05, 0x01, /* Usage Page (Desktop), */
298 0x09, 0x02, /* Usage (Mouse), */
299 0xA1, 0x01, /* Collection (Application), */
300 0x85, 0x01, /* Report ID (1), */
301 0x09, 0x01, /* Usage (Pointer), */
302 0xA0, /* Collection (Physical), */
303 0x75, 0x08, /* Report Size (8), */
304 0x95, 0x03, /* Report Count (3), */
305 0x81, 0x03, /* Input (Constant, Variable), */
306 0x95, 0x02, /* Report Count (2), */
307 0x15, 0xFF, /* Logical Minimum (-1), */
308 0x25, 0x01, /* Logical Maximum (1), */
309 0x09, 0x38, /* Usage (Wheel), */
310 0x0B, 0x38, 0x02, /* Usage (Consumer AC Pan), */
311 0x0C, 0x00,
312 0x81, 0x06, /* Input (Variable, Relative), */
313 0x95, 0x02, /* Report Count (2), */
314 0x81, 0x03, /* Input (Constant, Variable), */
315 0xC0, /* End Collection, */
316 0xC0, /* End Collection, */
317 0x05, 0x0C, /* Usage Page (Consumer), */
318 0x09, 0x01, /* Usage (Consumer Control), */
319 0xA1, 0x01, /* Collection (Application), */
320 0x85, 0x0D, /* Report ID (13), */
321 0x95, 0x01, /* Report Count (1), */
322 0x75, 0x10, /* Report Size (16), */
323 0x81, 0x03, /* Input (Constant, Variable), */
324 0x0A, 0x2F, 0x02, /* Usage (AC Zoom), */
325 0x0A, 0x2E, 0x02, /* Usage (AC Zoom Out), */
326 0x0A, 0x2D, 0x02, /* Usage (AC Zoom In), */
327 0x09, 0xB6, /* Usage (Scan Previous Track), */
328 0x09, 0xB5, /* Usage (Scan Next Track), */
329 0x08, /* Usage (00h), */
330 0x08, /* Usage (00h), */
331 0x08, /* Usage (00h), */
332 0x08, /* Usage (00h), */
333 0x08, /* Usage (00h), */
334 0x0A, 0x2E, 0x02, /* Usage (AC Zoom Out), */
335 0x0A, 0x2D, 0x02, /* Usage (AC Zoom In), */
336 0x15, 0x0C, /* Logical Minimum (12), */
337 0x25, 0x17, /* Logical Maximum (23), */
338 0x75, 0x05, /* Report Size (5), */
339 0x80, /* Input, */
340 0x75, 0x03, /* Report Size (3), */
341 0x81, 0x03, /* Input (Constant, Variable), */
342 0x75, 0x20, /* Report Size (32), */
343 0x81, 0x03, /* Input (Constant, Variable), */
344 0xC0, /* End Collection, */
345 0x09, 0x01, /* Usage (Consumer Control), */
346 0xA1, 0x01, /* Collection (Application), */
347 0x85, 0x0C, /* Report ID (12), */
348 0x75, 0x01, /* Report Size (1), */
349 0x09, 0xE9, /* Usage (Volume Inc), */
350 0x09, 0xEA, /* Usage (Volume Dec), */
351 0x09, 0xE2, /* Usage (Mute), */
352 0x14, /* Logical Minimum (0), */
353 0x25, 0x01, /* Logical Maximum (1), */
354 0x95, 0x03, /* Report Count (3), */
355 0x81, 0x06, /* Input (Variable, Relative), */
356 0x95, 0x35, /* Report Count (53), */
357 0x81, 0x03, /* Input (Constant, Variable), */
358 0xC0 /* End Collection */
359 };
360
361 /* Size of the original report descriptor of Media Tablet 14.1 inch */
362 #define MEDIA_TABLET_14_1_INCH_RDESC_ORIG_SIZE 309
363
364 /* Fixed Media Tablet 14.1 inch descriptor */
365 static __u8 media_tablet_14_1_inch_rdesc_fixed[] = {
366 0x05, 0x0D, /* Usage Page (Digitizer), */
367 0x09, 0x02, /* Usage (Pen), */
368 0xA1, 0x01, /* Collection (Application), */
369 0x85, 0x10, /* Report ID (16), */
370 0x09, 0x20, /* Usage (Stylus), */
371 0xA0, /* Collection (Physical), */
372 0x09, 0x42, /* Usage (Tip Switch), */
373 0x09, 0x44, /* Usage (Barrel Switch), */
374 0x09, 0x46, /* Usage (Tablet Pick), */
375 0x15, 0x01, /* Logical Minimum (1), */
376 0x25, 0x03, /* Logical Maximum (3), */
377 0x75, 0x04, /* Report Size (4), */
378 0x95, 0x01, /* Report Count (1), */
379 0x80, /* Input, */
380 0x75, 0x01, /* Report Size (1), */
381 0x09, 0x32, /* Usage (In Range), */
382 0x14, /* Logical Minimum (0), */
383 0x25, 0x01, /* Logical Maximum (1), */
384 0x95, 0x01, /* Report Count (1), */
385 0x81, 0x02, /* Input (Variable), */
386 0x95, 0x03, /* Report Count (3), */
387 0x81, 0x03, /* Input (Constant, Variable), */
388 0x75, 0x10, /* Report Size (16), */
389 0x95, 0x01, /* Report Count (1), */
390 0x14, /* Logical Minimum (0), */
391 0xA4, /* Push, */
392 0x05, 0x01, /* Usage Page (Desktop), */
393 0x65, 0x13, /* Unit (Inch), */
394 0x55, 0xFD, /* Unit Exponent (-3), */
395 0x34, /* Physical Minimum (0), */
396 0x09, 0x30, /* Usage (X), */
397 0x46, 0xE0, 0x2E, /* Physical Maximum (12000), */
398 0x26, 0xFF, 0x3F, /* Logical Maximum (16383), */
399 0x81, 0x02, /* Input (Variable), */
400 0x09, 0x31, /* Usage (Y), */
401 0x46, 0x52, 0x1C, /* Physical Maximum (7250), */
402 0x26, 0xFF, 0x3F, /* Logical Maximum (16383), */
403 0x81, 0x02, /* Input (Variable), */
404 0xB4, /* Pop, */
405 0x09, 0x30, /* Usage (Tip Pressure), */
406 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
407 0x81, 0x02, /* Input (Variable), */
408 0xC0, /* End Collection, */
409 0xC0, /* End Collection, */
410 0x05, 0x01, /* Usage Page (Desktop), */
411 0x09, 0x02, /* Usage (Mouse), */
412 0xA1, 0x01, /* Collection (Application), */
413 0x85, 0x01, /* Report ID (1), */
414 0x09, 0x01, /* Usage (Pointer), */
415 0xA0, /* Collection (Physical), */
416 0x75, 0x08, /* Report Size (8), */
417 0x95, 0x03, /* Report Count (3), */
418 0x81, 0x03, /* Input (Constant, Variable), */
419 0x95, 0x02, /* Report Count (2), */
420 0x15, 0xFF, /* Logical Minimum (-1), */
421 0x25, 0x01, /* Logical Maximum (1), */
422 0x09, 0x38, /* Usage (Wheel), */
423 0x0B, 0x38, 0x02, /* Usage (Consumer AC Pan), */
424 0x0C, 0x00,
425 0x81, 0x06, /* Input (Variable, Relative), */
426 0xC0, /* End Collection, */
427 0xC0, /* End Collection, */
428 0x05, 0x0C, /* Usage Page (Consumer), */
429 0x09, 0x01, /* Usage (Consumer Control), */
430 0xA1, 0x01, /* Collection (Application), */
431 0x85, 0x0D, /* Report ID (13), */
432 0x95, 0x01, /* Report Count (1), */
433 0x75, 0x10, /* Report Size (16), */
434 0x81, 0x03, /* Input (Constant, Variable), */
435 0x0A, 0x2F, 0x02, /* Usage (AC Zoom), */
436 0x0A, 0x2E, 0x02, /* Usage (AC Zoom Out), */
437 0x0A, 0x2D, 0x02, /* Usage (AC Zoom In), */
438 0x09, 0xB6, /* Usage (Scan Previous Track), */
439 0x09, 0xB5, /* Usage (Scan Next Track), */
440 0x08, /* Usage (00h), */
441 0x08, /* Usage (00h), */
442 0x08, /* Usage (00h), */
443 0x08, /* Usage (00h), */
444 0x08, /* Usage (00h), */
445 0x0A, 0x2E, 0x02, /* Usage (AC Zoom Out), */
446 0x0A, 0x2D, 0x02, /* Usage (AC Zoom In), */
447 0x15, 0x0C, /* Logical Minimum (12), */
448 0x25, 0x17, /* Logical Maximum (23), */
449 0x75, 0x05, /* Report Size (5), */
450 0x80, /* Input, */
451 0x75, 0x03, /* Report Size (3), */
452 0x81, 0x03, /* Input (Constant, Variable), */
453 0x75, 0x20, /* Report Size (32), */
454 0x81, 0x03, /* Input (Constant, Variable), */
455 0xC0, /* End Collection, */
456 0x09, 0x01, /* Usage (Consumer Control), */
457 0xA1, 0x01, /* Collection (Application), */
458 0x85, 0x0C, /* Report ID (12), */
459 0x75, 0x01, /* Report Size (1), */
460 0x09, 0xE9, /* Usage (Volume Inc), */
461 0x09, 0xEA, /* Usage (Volume Dec), */
462 0x09, 0xE2, /* Usage (Mute), */
463 0x14, /* Logical Minimum (0), */
464 0x25, 0x01, /* Logical Maximum (1), */
465 0x95, 0x03, /* Report Count (3), */
466 0x81, 0x06, /* Input (Variable, Relative), */
467 0x75, 0x05, /* Report Size (5), */
468 0x81, 0x03, /* Input (Constant, Variable), */
469 0xC0 /* End Collection */
470 };
471
472 /* Size of the original report descriptor of Sirius Battery Free Tablet */
473 #define SIRIUS_BATTERY_FREE_TABLET_RDESC_ORIG_SIZE 335
474
475 /* Fixed Sirius Battery Free Tablet descriptor */
476 static __u8 sirius_battery_free_tablet_rdesc_fixed[] = {
477 0x05, 0x0D, /* Usage Page (Digitizer), */
478 0x09, 0x02, /* Usage (Pen), */
479 0xA1, 0x01, /* Collection (Application), */
480 0x85, 0x10, /* Report ID (16), */
481 0x09, 0x20, /* Usage (Stylus), */
482 0xA0, /* Collection (Physical), */
483 0x95, 0x01, /* Report Count (1), */
484 0x15, 0x01, /* Logical Minimum (1), */
485 0x25, 0x03, /* Logical Maximum (3), */
486 0x75, 0x02, /* Report Size (2), */
487 0x09, 0x42, /* Usage (Tip Switch), */
488 0x09, 0x44, /* Usage (Barrel Switch), */
489 0x09, 0x46, /* Usage (Tablet Pick), */
490 0x80, /* Input, */
491 0x14, /* Logical Minimum (0), */
492 0x25, 0x01, /* Logical Maximum (1), */
493 0x75, 0x01, /* Report Size (1), */
494 0x09, 0x3C, /* Usage (Invert), */
495 0x81, 0x02, /* Input (Variable), */
496 0x81, 0x03, /* Input (Constant, Variable), */
497 0x09, 0x32, /* Usage (In Range), */
498 0x81, 0x02, /* Input (Variable), */
499 0x95, 0x03, /* Report Count (3), */
500 0x81, 0x03, /* Input (Constant, Variable), */
501 0xA4, /* Push, */
502 0x05, 0x01, /* Usage Page (Desktop), */
503 0x55, 0xFD, /* Unit Exponent (-3), */
504 0x65, 0x13, /* Unit (Inch), */
505 0x34, /* Physical Minimum (0), */
506 0x14, /* Logical Minimum (0), */
507 0x75, 0x10, /* Report Size (16), */
508 0x95, 0x01, /* Report Count (1), */
509 0x46, 0x10, 0x27, /* Physical Maximum (10000), */
510 0x26, 0x20, 0x4E, /* Logical Maximum (20000), */
511 0x09, 0x30, /* Usage (X), */
512 0x81, 0x02, /* Input (Variable), */
513 0x46, 0x70, 0x17, /* Physical Maximum (6000), */
514 0x26, 0xE0, 0x2E, /* Logical Maximum (12000), */
515 0x09, 0x31, /* Usage (Y), */
516 0x81, 0x02, /* Input (Variable), */
517 0xB4, /* Pop, */
518 0x75, 0x10, /* Report Size (16), */
519 0x95, 0x01, /* Report Count (1), */
520 0x14, /* Logical Minimum (0), */
521 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
522 0x09, 0x30, /* Usage (Tip Pressure), */
523 0x81, 0x02, /* Input (Variable), */
524 0xA4, /* Push, */
525 0x55, 0xFE, /* Unit Exponent (-2), */
526 0x65, 0x12, /* Unit (Radians), */
527 0x35, 0x97, /* Physical Minimum (-105), */
528 0x45, 0x69, /* Physical Maximum (105), */
529 0x15, 0x97, /* Logical Minimum (-105), */
530 0x25, 0x69, /* Logical Maximum (105), */
531 0x75, 0x08, /* Report Size (8), */
532 0x95, 0x02, /* Report Count (2), */
533 0x09, 0x3D, /* Usage (X Tilt), */
534 0x09, 0x3E, /* Usage (Y Tilt), */
535 0x81, 0x02, /* Input (Variable), */
536 0xB4, /* Pop, */
537 0xC0, /* End Collection, */
538 0xC0, /* End Collection, */
539 0x05, 0x01, /* Usage Page (Desktop), */
540 0x09, 0x02, /* Usage (Mouse), */
541 0xA1, 0x01, /* Collection (Application), */
542 0x85, 0x01, /* Report ID (1), */
543 0x09, 0x01, /* Usage (Pointer), */
544 0xA0, /* Collection (Physical), */
545 0x75, 0x08, /* Report Size (8), */
546 0x95, 0x03, /* Report Count (3), */
547 0x81, 0x03, /* Input (Constant, Variable), */
548 0x09, 0x38, /* Usage (Wheel), */
549 0x15, 0xFF, /* Logical Minimum (-1), */
550 0x25, 0x01, /* Logical Maximum (1), */
551 0x75, 0x08, /* Report Size (8), */
552 0x95, 0x01, /* Report Count (1), */
553 0x81, 0x06, /* Input (Variable, Relative), */
554 0x75, 0x08, /* Report Size (8), */
555 0x95, 0x03, /* Report Count (3), */
556 0x81, 0x03, /* Input (Constant, Variable), */
557 0xC0, /* End Collection, */
558 0xC0, /* End Collection, */
559 0x05, 0x01, /* Usage Page (Desktop), */
560 0x09, 0x06, /* Usage (Keyboard), */
561 0xA1, 0x01, /* Collection (Application), */
562 0x85, 0x0D, /* Report ID (13), */
563 0x05, 0x07, /* Usage Page (Keyboard), */
564 0x19, 0xE0, /* Usage Minimum (KB Leftcontrol), */
565 0x29, 0xE7, /* Usage Maximum (KB Right GUI), */
566 0x14, /* Logical Minimum (0), */
567 0x25, 0x01, /* Logical Maximum (1), */
568 0x75, 0x01, /* Report Size (1), */
569 0x95, 0x08, /* Report Count (8), */
570 0x81, 0x02, /* Input (Variable), */
571 0x75, 0x08, /* Report Size (8), */
572 0x95, 0x01, /* Report Count (1), */
573 0x81, 0x01, /* Input (Constant), */
574 0x18, /* Usage Minimum (None), */
575 0x29, 0x65, /* Usage Maximum (KB Application), */
576 0x14, /* Logical Minimum (0), */
577 0x25, 0x65, /* Logical Maximum (101), */
578 0x75, 0x08, /* Report Size (8), */
579 0x95, 0x05, /* Report Count (5), */
580 0x80, /* Input, */
581 0xC0, /* End Collection, */
582 0x05, 0x0C, /* Usage Page (Consumer), */
583 0x09, 0x01, /* Usage (Consumer Control), */
584 0xA1, 0x01, /* Collection (Application), */
585 0x85, 0x0C, /* Report ID (12), */
586 0x09, 0xE9, /* Usage (Volume Inc), */
587 0x09, 0xEA, /* Usage (Volume Dec), */
588 0x14, /* Logical Minimum (0), */
589 0x25, 0x01, /* Logical Maximum (1), */
590 0x75, 0x01, /* Report Size (1), */
591 0x95, 0x02, /* Report Count (2), */
592 0x81, 0x02, /* Input (Variable), */
593 0x75, 0x06, /* Report Size (6), */
594 0x95, 0x01, /* Report Count (1), */
595 0x81, 0x03, /* Input (Constant, Variable), */
596 0x75, 0x10, /* Report Size (16), */
597 0x95, 0x03, /* Report Count (3), */
598 0x81, 0x03, /* Input (Constant, Variable), */
599 0xC0 /* End Collection */
600 };
601
602 static __u8 *waltop_report_fixup(struct hid_device *hdev, __u8 *rdesc,
603 unsigned int *rsize)
604 {
605 switch (hdev->product) {
606 case USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH:
607 if (*rsize == SLIM_TABLET_5_8_INCH_RDESC_ORIG_SIZE) {
608 rdesc = slim_tablet_5_8_inch_rdesc_fixed;
609 *rsize = sizeof(slim_tablet_5_8_inch_rdesc_fixed);
610 }
611 break;
612 case USB_DEVICE_ID_WALTOP_SLIM_TABLET_12_1_INCH:
613 if (*rsize == SLIM_TABLET_12_1_INCH_RDESC_ORIG_SIZE) {
614 rdesc = slim_tablet_12_1_inch_rdesc_fixed;
615 *rsize = sizeof(slim_tablet_12_1_inch_rdesc_fixed);
616 }
617 break;
618 case USB_DEVICE_ID_WALTOP_Q_PAD:
619 if (*rsize == Q_PAD_RDESC_ORIG_SIZE) {
620 rdesc = q_pad_rdesc_fixed;
621 *rsize = sizeof(q_pad_rdesc_fixed);
622 }
623 break;
624 case USB_DEVICE_ID_WALTOP_PID_0038:
625 if (*rsize == PID_0038_RDESC_ORIG_SIZE) {
626 rdesc = pid_0038_rdesc_fixed;
627 *rsize = sizeof(pid_0038_rdesc_fixed);
628 }
629 break;
630 case USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH:
631 if (*rsize == MEDIA_TABLET_10_6_INCH_RDESC_ORIG_SIZE) {
632 rdesc = media_tablet_10_6_inch_rdesc_fixed;
633 *rsize = sizeof(media_tablet_10_6_inch_rdesc_fixed);
634 }
635 break;
636 case USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH:
637 if (*rsize == MEDIA_TABLET_14_1_INCH_RDESC_ORIG_SIZE) {
638 rdesc = media_tablet_14_1_inch_rdesc_fixed;
639 *rsize = sizeof(media_tablet_14_1_inch_rdesc_fixed);
640 }
641 break;
642 case USB_DEVICE_ID_WALTOP_SIRIUS_BATTERY_FREE_TABLET:
643 if (*rsize == SIRIUS_BATTERY_FREE_TABLET_RDESC_ORIG_SIZE) {
644 rdesc = sirius_battery_free_tablet_rdesc_fixed;
645 *rsize = sizeof(sirius_battery_free_tablet_rdesc_fixed);
646 }
647 break;
648 }
649 return rdesc;
650 }
651
652 static int waltop_raw_event(struct hid_device *hdev, struct hid_report *report,
653 u8 *data, int size)
654 {
655 /* If this is a pen input report */
656 if (report->type == HID_INPUT_REPORT && report->id == 16 && size >= 8) {
657 /*
658 * Ignore reported pressure when a barrel button is pressed,
659 * because it is rarely correct.
660 */
661
662 /* If a barrel button is pressed */
663 if ((data[1] & 0xF) > 1) {
664 /* Report zero pressure */
665 data[6] = 0;
666 data[7] = 0;
667 }
668 }
669
670 /* If this is a pen input report of Sirius Battery Free Tablet */
671 if (hdev->product == USB_DEVICE_ID_WALTOP_SIRIUS_BATTERY_FREE_TABLET &&
672 report->type == HID_INPUT_REPORT &&
673 report->id == 16 &&
674 size == 10) {
675 /*
676 * The tablet reports tilt as roughly sin(a)*21 (18 means 60
677 * degrees).
678 *
679 * This array stores angles as radians * 100, corresponding to
680 * reported values up to 60 degrees, as expected by userspace.
681 */
682 static const s8 tilt_to_radians[] = {
683 0, 5, 10, 14, 19, 24, 29, 34, 40, 45,
684 50, 56, 62, 68, 74, 81, 88, 96, 105
685 };
686
687 s8 tilt_x = (s8)data[8];
688 s8 tilt_y = (s8)data[9];
689 s8 sign_x = tilt_x >= 0 ? 1 : -1;
690 s8 sign_y = tilt_y >= 0 ? 1 : -1;
691
692 tilt_x *= sign_x;
693 tilt_y *= sign_y;
694
695 /*
696 * Reverse the Y Tilt direction to match the HID standard and
697 * userspace expectations. See HID Usage Tables v1.12 16.3.2
698 * Tilt Orientation.
699 */
700 sign_y *= -1;
701
702 /*
703 * This effectively clamps reported tilt to 60 degrees - the
704 * range expected by userspace
705 */
706 if (tilt_x > ARRAY_SIZE(tilt_to_radians) - 1)
707 tilt_x = ARRAY_SIZE(tilt_to_radians) - 1;
708 if (tilt_y > ARRAY_SIZE(tilt_to_radians) - 1)
709 tilt_y = ARRAY_SIZE(tilt_to_radians) - 1;
710
711 data[8] = tilt_to_radians[tilt_x] * sign_x;
712 data[9] = tilt_to_radians[tilt_y] * sign_y;
713 }
714
715 return 0;
716 }
717
718 static const struct hid_device_id waltop_devices[] = {
719 { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
720 USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH) },
721 { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
722 USB_DEVICE_ID_WALTOP_SLIM_TABLET_12_1_INCH) },
723 { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
724 USB_DEVICE_ID_WALTOP_Q_PAD) },
725 { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
726 USB_DEVICE_ID_WALTOP_PID_0038) },
727 { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
728 USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH) },
729 { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
730 USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH) },
731 { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
732 USB_DEVICE_ID_WALTOP_SIRIUS_BATTERY_FREE_TABLET) },
733 { }
734 };
735 MODULE_DEVICE_TABLE(hid, waltop_devices);
736
737 static struct hid_driver waltop_driver = {
738 .name = "waltop",
739 .id_table = waltop_devices,
740 .report_fixup = waltop_report_fixup,
741 .raw_event = waltop_raw_event,
742 };
743 module_hid_driver(waltop_driver);
744
745 MODULE_LICENSE("GPL");