summaryrefslogtreecommitdiffstats
path: root/drivers/hid/hid-waltop.c
blob: 81cb4edb6b6bd64d4747cc76dfd7fb26575ef593 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
/*
 *  HID driver for Waltop devices not fully compliant with HID standard
 *
 *  Copyright (c) 2010 Nikolai Kondrashov
 */

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 */

#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>

#include "hid-ids.h"

/*
 * Original Slim Tablet 5.8 inch report descriptor.
 *
 * All the reports except the report with ID 16 (the stylus) are unused,
 * possibly because the tablet is not configured to, or because they were
 * just copied from a more capable model. The purpose of features described
 * for report ID 2 is unknown.
 *
 * The stylus buttons are described as three bit fields, whereas actually
 * it's an "array", i.e. they're reported as button numbers (1, 2 and 3).
 * The "eraser" field is not used. There is also a "push" without a "pop" in
 * the stylus description.
 *
 *  Usage Page (Desktop),           ; Generic desktop controls (01h)
 *  Usage (Mouse),                  ; Mouse (02h, application collection)
 *  Collection (Application),
 *    Report ID (1),
 *    Usage (Pointer),              ; Pointer (01h, physical collection)
 *    Collection (Physical),
 *      Usage Page (Button),        ; Button (09h)
 *      Usage Minimum (01h),
 *      Usage Maximum (05h),
 *      Logical Minimum (0),
 *      Logical Maximum (1),
 *      Report Size (1),
 *      Report Count (5),
 *      Input (Variable),
 *      Report Size (3),
 *      Report Count (1),
 *      Input (Constant, Variable),
 *      Usage Page (Desktop),       ; Generic desktop controls (01h)
 *      Usage (X),                  ; X (30h, dynamic value)
 *      Usage (Y),                  ; Y (31h, dynamic value)
 *      Usage (Wheel),              ; Wheel (38h, dynamic value)
 *      Logical Minimum (-127),
 *      Logical Maximum (127),
 *      Report Size (8),
 *      Report Count (3),
 *      Input (Variable, Relative),
 *    End Collection,
 *  End Collection,
 *  Usage Page (Digitizer),         ; Digitizer (0Dh)
 *  Usage (Pen),                    ; Pen (02h, application collection)
 *  Collection (Application),
 *    Report ID (2),
 *    Usage (Stylus),               ; Stylus (20h, logical collection)
 *    Collection (Physical),
 *      Usage (00h),
 *      Logical Minimum (0),
 *      Logical Maximum (255),
 *      Report Size (8),
 *      Report Count (7),
 *      Input (Variable),
 *      Usage (Azimuth),            ; Azimuth (3Fh, dynamic value)
 *      Usage (Altitude),           ; Altitude (40h, dynamic value)
 *      Logical Minimum (0),
 *      Logical Maximum (255),
 *      Report Size (8),
 *      Report Count (2),
 *      Feature (Variable),
 *    End Collection,
 *    Report ID (5),
 *    Usage Page (Digitizer),       ; Digitizer (0Dh)
 *    Usage (Stylus),               ; Stylus (20h, logical collection)
 *    Collection (Physical),
 *      Usage (00h),
 *      Logical Minimum (0),
 *      Logical Maximum (255),
 *      Report Size (8),
 *      Report Count (7),
 *      Input (Variable),
 *    End Collection,
 *    Report ID (10),
 *    Usage Page (Digitizer),       ; Digitizer (0Dh)
 *    Usage (Stylus),               ; Stylus (20h, logical collection)
 *    Collection (Physical),
 *      Usage (00h),
 *      Logical Minimum (0),
 *      Logical Maximum (255),
 *      Report Size (8),
 *      Report Count (3),
 *      Input (Variable),
 *    End Collection,
 *    Report ID (16),
 *    Usage (Stylus),               ; Stylus (20h, logical collection)
 *    Collection (Physical),
 *      Usage (Tip Switch),         ; Tip switch (42h, momentary control)
 *      Usage (Barrel Switch),      ; Barrel switch (44h, momentary control)
 *      Usage (Invert),             ; Invert (3Ch, momentary control)
 *      Usage (Eraser),             ; Eraser (45h, momentary control)
 *      Usage (In Range),           ; In range (32h, momentary control)
 *      Logical Minimum (0),
 *      Logical Maximum (1),
 *      Report Size (1),
 *      Report Count (5),
 *      Input (Variable),
 *      Report Count (3),
 *      Input (Constant, Variable),
 *      Usage Page (Desktop),       ; Generic desktop controls (01h)
 *      Usage (X),                  ; X (30h, dynamic value)
 *      Report Size (16),
 *      Report Count (1),
 *      Push,
 *      Unit Exponent (13),
 *      Unit (Inch^3),
 *      Logical Minimum (0),
 *      Logical Maximum (10000),
 *      Physical Minimum (0),
 *      Physical Maximum (10000),
 *      Input (Variable),
 *      Usage (Y),                  ; Y (31h, dynamic value)
 *      Logical Maximum (6000),
 *      Physical Maximum (6000),
 *      Input (Variable),
 *      Usage Page (Digitizer),     ; Digitizer (0Dh)
 *      Usage (Tip Pressure),       ; Tip pressure (30h, dynamic value)
 *      Logical Minimum (0),
 *      Logical Maximum (1023),
 *      Physical Minimum (0),
 *      Physical Maximum (1023),
 *      Input (Variable),
 *    End Collection,
 *  End Collection
 */

/* Size of the original report descriptor of Slim Tablet 5.8 inch */
#define SLIM_TABLET_5_8_INCH_RDESC_ORIG_SIZE	222

/*
 * Fixed Slim Tablet 5.8 inch descriptor.
 *
 * All the reports except the stylus report (ID 16) were removed as unused.
 * The stylus buttons description was fixed.
 */
static __u8 slim_tablet_5_8_inch_rdesc_fixed[] = {
	0x05, 0x0D,         /*  Usage Page (Digitizer),             */
	0x09, 0x02,         /*  Usage (Pen),                        */
	0xA1, 0x01,         /*  Collection (Application),           */
	0x85, 0x10,         /*      Report ID (16),                 */
	0x09, 0x20,         /*      Usage (Stylus),                 */
	0xA0,               /*      Collection (Physical),          */
	0x09, 0x42,         /*          Usage (Tip Switch),         */
	0x09, 0x44,         /*          Usage (Barrel Switch),      */
	0x09, 0x46,         /*          Usage (Tablet Pick),        */
	0x15, 0x01,         /*          Logical Minimum (1),        */
	0x25, 0x03,         /*          Logical Maximum (3),        */
	0x75, 0x04,         /*          Report Size (4),            */
	0x95, 0x01,         /*          Report Count (1),           */
	0x80,               /*          Input,                      */
	0x09, 0x32,         /*          Usage (In Range),           */
	0x14,               /*          Logical Minimum (0),        */
	0x25, 0x01,         /*          Logical Maximum (1),        */
	0x75, 0x01,         /*          Report Size (1),            */
	0x95, 0x01,         /*          Report Count (1),           */
	0x81, 0x02,         /*          Input (Variable),           */
	0x95, 0x03,         /*          Report Count (3),           */
	0x81, 0x03,         /*          Input (Constant, Variable), */
	0x75, 0x10,         /*          Report Size (16),           */
	0x95, 0x01,         /*          Report Count (1),           */
	0x14,               /*          Logical Minimum (0),        */
	0xA4,               /*          Push,                       */
	0x05, 0x01,         /*          Usage Page (Desktop),       */
	0x65, 0x13,         /*          Unit (Inch),                */
	0x55, 0xFD,         /*          Unit Exponent (-3),         */
	0x34,               /*          Physical Minimum (0),       */
	0x09, 0x30,         /*          Usage (X),                  */
	0x46, 0x88, 0x13,   /*          Physical Maximum (5000),    */
	0x26, 0x10, 0x27,   /*          Logical Maximum (10000),    */
	0x81, 0x02,         /*          Input (Variable),           */
	0x09, 0x31,         /*          Usage (Y),                  */
	0x46, 0xB8, 0x0B,   /*          Physical Maximum (3000),    */
	0x26, 0x70, 0x17,   /*          Logical Maximum (6000),     */
	0x81, 0x02,         /*          Input (Variable),           */
	0xB4,               /*          Pop,                        */
	0x09, 0x30,         /*          Usage (Tip Pressure),       */
	0x26, 0xFF, 0x03,   /*          Logical Maximum (1023),     */
	0x81, 0x02,         /*          Input (Variable),           */
	0xC0,               /*      End Collection,                 */
	0xC0                /*  End Collection                      */
};

/*
 * Original Media Tablet 10.6 inch report descriptor.
 *
 * There are at least two versions of this model in the wild. They are
 * represented by Genius G-Pen M609 (older version) and Genius G-Pen M609X
 * (newer version).
 *
 * Both versions have the usual pen with two barrel buttons and two
 * identical wheels with center buttons in the top corners of the tablet
 * base. They also have buttons on the top, between the wheels, for
 * selecting the wheels' functions and wide/standard mode. In the wide mode
 * the whole working surface is sensed, in the standard mode a narrower area
 * is sensed, but the logical report extents remain the same. These modes
 * correspond roughly to 16:9 and 4:3 aspect ratios respectively.
 *
 * The older version has three wheel function buttons ("scroll", "zoom" and
 * "volume") and two separate buttons for wide and standard mode. The newer
 * version has four wheel function buttons (plus "brush") and only one
 * button is used for selecting wide/standard mode. So, the total number of
 * buttons remains the same, but one of the mode buttons is repurposed as a
 * wheels' function button in the newer version.
 *
 * The wheel functions are:
 * scroll   - the wheels act as scroll wheels, the center buttons do nothing.
 * zoom     - the wheels zoom in/out, the buttons supposedly reset to 100%.
 * volume   - the wheels control the sound volume, the buttons mute.
 * brush    - the wheels are supposed to control brush width in a graphics
 *            editor, the buttons do nothing.
 *
 * Below is the newer version's report descriptor. It may very well be that
 * the older version's descriptor is different and thus it won't be
 * supported.
 *
 * The mouse report (ID 1) only uses the wheel field for reporting the tablet
 * wheels' scroll mode. The keyboard report (ID 13) is used to report the
 * wheels' zoom and brush control functions as key presses. The report ID 12
 * is used to report the wheels' volume control functions. The stylus report
 * (ID 16) has the same problems as the Slim Tablet 5.8 inch report has.
 *
 * The rest of the reports are unused, at least in the default configuration.
 * The purpose of the features is unknown.
 *
 *  Usage Page (Desktop),
 *  Usage (Mouse),
 *  Collection (Application),
 *    Report ID (1),
 *    Usage (Pointer),
 *    Collection (Physical),
 *      Usage Page (Button),
 *      Usage Minimum (01h),
 *      Usage Maximum (05h),
 *      Logical Minimum (0),
 *      Logical Maximum (1),
 *      Report Size (1),
 *      Report Count (5),
 *      Input (Variable),
 *      Report Size (3),
 *      Report Count (1),
 *      Input (Constant, Variable),
 *      Usage Page (Desktop),
 *      Usage (X),
 *      Usage (Y),
 *      Usage (Wheel),
 *      Logical Minimum (-127),
 *      Logical Maximum (127),
 *      Report Size (8),
 *      Report Count (3),
 *      Input (Variable, Relative),
 *    End Collection,
 *  End Collection,
 *  Usage Page (Digitizer),
 *  Usage (Pen),
 *  Collection (Application),
 *    Report ID (2),
 *    Usage (Stylus),
 *    Collection (Physical),
 *      Usage (00h),
 *      Logical Minimum (0),
 *      Logical Maximum (255),
 *      Report Size (8),
 *      Report Count (7),
 *      Input (Variable),
 *      Usage (Azimuth),
 *      Usage (Altitude),
 *      Logical Minimum (0),
 *      Logical Maximum (255),
 *      Report Size (8),
 *      Report Count (2),
 *      Feature (Variable),
 *    End Collection,
 *    Report ID (5),
 *    Usage Page (Digitizer),
 *    Usage (Stylus),
 *    Collection (Physical),
 *      Usage (00h),
 *      Logical Minimum (0),
 *      Logical Maximum (255),
 *      Report Size (8),
 *      Report Count (7),
 *      Input (Variable),
 *    End Collection,
 *    Report ID (10),
 *    Usage Page (Digitizer),
 *    Usage (Stylus),
 *    Collection (Physical),
 *      Usage (00h),
 *      Logical Minimum (0),
 *      Logical Maximum (255),
 *      Report Size (8),
 *      Report Count (7),
 *      Input (Variable),
 *    End Collection,
 *    Report ID (16),
 *    Usage (Stylus),
 *    Collection (Physical),
 *      Usage (Tip Switch),
 *      Usage (Barrel Switch),
 *      Usage (Invert),
 *      Usage (Eraser),
 *      Usage (In Range),
 *      Logical Minimum (0),
 *      Logical Maximum (1),
 *      Report Size (1),
 *      Report Count (5),
 *      Input (Variable),
 *      Report Count (3),
 *      Input (Constant, Variable),
 *      Usage Page (Desktop),
 *      Usage (X),
 *      Report Size (16),
 *      Report Count (1),
 *      Push,
 *      Unit Exponent (13),
 *      Unit (Inch^3),
 *      Logical Minimum (0),
 *      Logical Maximum (18000),
 *      Physical Minimum (0),
 *      Physical Maximum (18000),
 *      Input (Variable),
 *      Usage (Y),
 *      Logical Maximum (11000),
 *      Physical Maximum (11000),
 *      Input (Variable),
 *      Usage Page (Digitizer),
 *      Usage (Tip Pressure),
 *      Logical Minimum (0),
 *      Logical Maximum (1023),
 *      Physical Minimum (0),
 *      Physical Maximum (1023),
 *      Input (Variable),
 *    End Collection,
 *  End Collection,
 *  Usage Page (Desktop),
 *  Usage (Keyboard),
 *  Collection (Application),
 *    Report ID (13),
 *    Usage Page (Keyboard),
 *    Usage Minimum (KB Leftcontrol),
 *    Usage Maximum (KB Right GUI),
 *    Logical Minimum (0),
 *    Logical Maximum (1),
 *    Report Size (1),
 *    Report Count (8),
 *    Input (Variable),
 *    Report Size (8),
 *    Report Count (1),
 *    Input (Constant),
 *    Usage Page (Keyboard),
 *    Usage Minimum (None),
 *    Usage Maximum (KB Application),
 *    Logical Minimum (0),
 *    Logical Maximum (101),
 *    Report Size (8),
 *    Report Count (5),
 *    Input,
 *  End Collection,
 *  Usage Page (Consumer),
 *  Usage (Consumer Control),
 *  Collection (Application),
 *    Report ID (12),
 *    Usage (Volume Inc),
 *    Usage (Volume Dec),
 *    Usage (Mute),
 *    Logical Minimum (0),
 *    Logical Maximum (1),
 *    Report Size (1),
 *    Report Count (3),
 *    Input (Variable, Relative),
 *    Report Size (5),
 *    Report Count (1),
 *    Input (Constant, Variable, Relative),
 *  End Collection
 */

/* Size of the original report descriptor of Media Tablet 10.6 inch */
#define MEDIA_TABLET_10_6_INCH_RDESC_ORIG_SIZE	300

/*
 * Fixed Media Tablet 10.6 inch descriptor.
 *
 * The descriptions of reports unused in the default configuration are
 * removed. The stylus report (ID 16) is fixed similarly to Slim Tablet 5.8
 * inch.  The unused mouse report (ID 1) fields are replaced with constant
 * padding.
 *
 * The keyboard report (ID 13) is hacked to instead have an "array" field
 * reporting consumer page controls, and all the unused bits are masked out
 * with constant padding. The "brush" wheels' function is represented as "Scan
 * Previous/Next Track" controls due to the lack of brush controls in the
 * usage tables specification.
 */
static __u8 media_tablet_10_6_inch_rdesc_fixed[] = {
	0x05, 0x0D,         /*  Usage Page (Digitizer),             */
	0x09, 0x02,         /*  Usage (Pen),                        */
	0xA1, 0x01,         /*  Collection (Application),           */
	0x85, 0x10,         /*      Report ID (16),                 */
	0x09, 0x20,         /*      Usage (Stylus),                 */
	0xA0,               /*      Collection (Physical),          */
	0x09, 0x42,         /*          Usage (Tip Switch),         */
	0x09, 0x44,         /*          Usage (Barrel Switch),      */
	0x09, 0x46,         /*          Usage (Tablet Pick),        */
	0x15, 0x01,         /*          Logical Minimum (1),        */
	0x25, 0x03,         /*          Logical Maximum (3),        */
	0x75, 0x04,         /*          Report Size (4),            */
	0x95, 0x01,         /*          Report Count (1),           */
	0x80,               /*          Input,                      */
	0x75, 0x01,         /*          Report Size (1),            */
	0x09, 0x32,         /*          Usage (In Range),           */
	0x14,               /*          Logical Minimum (0),        */
	0x25, 0x01,         /*          Logical Maximum (1),        */
	0x95, 0x01,         /*          Report Count (1),           */
	0x81, 0x02,         /*          Input (Variable),           */
	0x95, 0x03,         /*          Report Count (3),           */
	0x81, 0x03,         /*          Input (Constant, Variable), */
	0x75, 0x10,         /*          Report Size (16),           */
	0x95, 0x01,         /*          Report Count (1),           */
	0x14,               /*          Logical Minimum (0),        */
	0xA4,               /*          Push,                       */
	0x05, 0x01,         /*          Usage Page (Desktop),       */
	0x65, 0x13,         /*          Unit (Inch),                */
	0x55, 0xFD,         /*          Unit Exponent (-3),         */
	0x34,               /*          Physical Minimum (0),       */
	0x09, 0x30,         /*          Usage (X),                  */
	0x46, 0x28, 0x23,   /*          Physical Maximum (9000),    */
	0x26, 0x50, 0x46,   /*          Logical Maximum (18000),    */
	0x81, 0x02,         /*          Input (Variable),           */
	0x09, 0x31,         /*          Usage (Y),                  */
	0x46, 0x7C, 0x15,   /*          Physical Maximum (5500),    */
	0x26, 0xF8, 0x2A,   /*          Logical Maximum (11000),    */
	0x81, 0x02,         /*          Input (Variable),           */
	0xB4,               /*          Pop,                        */
	0x09, 0x30,         /*          Usage (Tip Pressure),       */
	0x26, 0xFF, 0x03,   /*          Logical Maximum (1023),     */
	0x81, 0x02,         /*          Input (Variable),           */
	0xC0,               /*      End Collection,                 */
	0xC0,               /*  End Collection,                     */
	0x05, 0x01,         /*  Usage Page (Desktop),               */
	0x09, 0x02,         /*  Usage (Mouse),                      */
	0xA1, 0x01,         /*  Collection (Application),           */
	0x85, 0x01,         /*      Report ID (1),                  */
	0x09, 0x01,         /*      Usage (Pointer),                */
	0xA0,               /*      Collection (Physical),          */
	0x95, 0x01,         /*          Report Count (1),           */
	0x75, 0x18,         /*          Report Size (24),           */
	0x81, 0x03,         /*          Input (Constant, Variable), */
	0x05, 0x01,         /*          Usage Page (Desktop),       */
	0x09, 0x38,         /*          Usage (Wheel),              */
	0x15, 0xFF,         /*          Logical Minimum (-1),       */
	0x25, 0x01,         /*          Logical Maximum (1),        */
	0x75, 0x08,         /*          Report Size (8),            */
	0x81, 0x06,         /*          Input (Variable, Relative), */
	0x75, 0x18,         /*          Report Size (24),           */
	0x81, 0x03,         /*          Input (Constant, Variable), */
	0xC0,               /*      End Collection,                 */
	0xC0,               /*  End Collection,                     */
	0x05, 0x0C,         /*  Usage Page (Consumer),              */
	0x09, 0x01,         /*  Usage (Consumer Control),           */
	0xA1, 0x01,         /*  Collection (Application),           */
	0x85, 0x0D,         /*      Report ID (13),                 */
	0x95, 0x01,         /*      Report Count (1),               */
	0x75, 0x10,         /*      Report Size (16),               */
	0x81, 0x03,         /*      Input (Constant, Variable),     */
	0x0A, 0x2F, 0x02,   /*      Usage (AC Zoom),                */
	0x0A, 0x2E, 0x02,   /*      Usage (AC Zoom Out),            */
	0x0A, 0x2D, 0x02,   /*      Usage (AC Zoom In),             */
	0x09, 0xB6,         /*      Usage (Scan Previous Track),    */
	0x09, 0xB5,         /*      Usage (Scan Next Track),        */
	0x15, 0x2C,         /*      Logical Minimum (44),           */
	0x25, 0x30,         /*      Logical Maximum (48),           */
	0x75, 0x08,         /*      Report Size (8),                */
	0x80,               /*      Input,                          */
	0x75, 0x20,         /*      Report Size (32),               */
	0x81, 0x03,         /*      Input (Constant, Variable),     */
	0xC0,               /*  End Collection,                     */
	0x09, 0x01,         /*  Usage (Consumer Control),           */
	0xA1, 0x01,         /*  Collection (Application),           */
	0x85, 0x0C,         /*      Report ID (12),                 */
	0x75, 0x01,         /*      Report Size (1),                */
	0x09, 0xE9,         /*      Usage (Volume Inc),             */
	0x09, 0xEA,         /*      Usage (Volume Dec),             */
	0x09, 0xE2,         /*      Usage (Mute),                   */
	0x14,               /*      Logical Minimum (0),            */
	0x25, 0x01,         /*      Logical Maximum (1),            */
	0x95, 0x03,         /*      Report Count (3),               */
	0x81, 0x06,         /*      Input (Variable, Relative),     */
	0x95, 0x35,         /*      Report Count (53),              */
	0x81, 0x03,         /*      Input (Constant, Variable),     */
	0xC0                /*  End Collection                      */
};

static __u8 *waltop_report_fixup(struct hid_device *hdev, __u8 *rdesc,
		unsigned int *rsize)
{
	switch (hdev->product) {
	case USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH:
		if (*rsize == SLIM_TABLET_5_8_INCH_RDESC_ORIG_SIZE) {
			rdesc = slim_tablet_5_8_inch_rdesc_fixed;
			*rsize = sizeof(slim_tablet_5_8_inch_rdesc_fixed);
		}
		break;
	case USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH:
		if (*rsize == MEDIA_TABLET_10_6_INCH_RDESC_ORIG_SIZE) {
			rdesc = media_tablet_10_6_inch_rdesc_fixed;
			*rsize = sizeof(media_tablet_10_6_inch_rdesc_fixed);
		}
		break;
	}
	return rdesc;
}

static const struct hid_device_id waltop_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
				USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_WALTOP,
				USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH) },
	{ }
};
MODULE_DEVICE_TABLE(hid, waltop_devices);

static struct hid_driver waltop_driver = {
	.name = "waltop",
	.id_table = waltop_devices,
	.report_fixup = waltop_report_fixup,
};

static int __init waltop_init(void)
{
	return hid_register_driver(&waltop_driver);
}

static void __exit waltop_exit(void)
{
	hid_unregister_driver(&waltop_driver);
}

module_init(waltop_init);
module_exit(waltop_exit);
MODULE_LICENSE("GPL");
OpenPOWER on IntegriCloud