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
|
/*
* Copyright (c) 2016 Masaki Ota <masaki.ota@jp.alps.com>
*
* 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/kernel.h>
#include <linux/hid.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/module.h>
#include <asm/unaligned.h>
#include "hid-ids.h"
/* ALPS Device Product ID */
#define HID_PRODUCT_ID_T3_BTNLESS 0xD0C0
#define HID_PRODUCT_ID_COSMO 0x1202
#define HID_PRODUCT_ID_U1_PTP_1 0x1207
#define HID_PRODUCT_ID_U1 0x1209
#define HID_PRODUCT_ID_U1_PTP_2 0x120A
#define HID_PRODUCT_ID_U1_DUAL 0x120B
#define HID_PRODUCT_ID_T4_BTNLESS 0x120C
#define DEV_SINGLEPOINT 0x01
#define DEV_DUALPOINT 0x02
#define U1_MOUSE_REPORT_ID 0x01 /* Mouse data ReportID */
#define U1_ABSOLUTE_REPORT_ID 0x03 /* Absolute data ReportID */
#define U1_FEATURE_REPORT_ID 0x05 /* Feature ReportID */
#define U1_SP_ABSOLUTE_REPORT_ID 0x06 /* Feature ReportID */
#define U1_FEATURE_REPORT_LEN 0x08 /* Feature Report Length */
#define U1_FEATURE_REPORT_LEN_ALL 0x0A
#define U1_CMD_REGISTER_READ 0xD1
#define U1_CMD_REGISTER_WRITE 0xD2
#define U1_DEVTYPE_SP_SUPPORT 0x10 /* SP Support */
#define U1_DISABLE_DEV 0x01
#define U1_TP_ABS_MODE 0x02
#define U1_SP_ABS_MODE 0x80
#define ADDRESS_U1_DEV_CTRL_1 0x00800040
#define ADDRESS_U1_DEVICE_TYP 0x00800043
#define ADDRESS_U1_NUM_SENS_X 0x00800047
#define ADDRESS_U1_NUM_SENS_Y 0x00800048
#define ADDRESS_U1_PITCH_SENS_X 0x00800049
#define ADDRESS_U1_PITCH_SENS_Y 0x0080004A
#define ADDRESS_U1_RESO_DWN_ABS 0x0080004E
#define ADDRESS_U1_PAD_BTN 0x00800052
#define ADDRESS_U1_SP_BTN 0x0080009F
#define MAX_TOUCHES 5
/**
* struct u1_data
*
* @input: pointer to the kernel input device
* @input2: pointer to the kernel input2 device
* @hdev: pointer to the struct hid_device
*
* @dev_ctrl: device control parameter
* @dev_type: device type
* @sen_line_num_x: number of sensor line of X
* @sen_line_num_y: number of sensor line of Y
* @pitch_x: sensor pitch of X
* @pitch_y: sensor pitch of Y
* @resolution: resolution
* @btn_info: button information
* @x_active_len_mm: active area length of X (mm)
* @y_active_len_mm: active area length of Y (mm)
* @x_max: maximum x coordinate value
* @y_max: maximum y coordinate value
* @btn_cnt: number of buttons
* @sp_btn_cnt: number of stick buttons
*/
struct u1_dev {
struct input_dev *input;
struct input_dev *input2;
struct hid_device *hdev;
u8 dev_ctrl;
u8 dev_type;
u8 sen_line_num_x;
u8 sen_line_num_y;
u8 pitch_x;
u8 pitch_y;
u8 resolution;
u8 btn_info;
u8 sp_btn_info;
u32 x_active_len_mm;
u32 y_active_len_mm;
u32 x_max;
u32 y_max;
u32 btn_cnt;
u32 sp_btn_cnt;
};
static int u1_read_write_register(struct hid_device *hdev, u32 address,
u8 *read_val, u8 write_val, bool read_flag)
{
int ret, i;
u8 check_sum;
u8 *input;
u8 *readbuf;
input = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
if (!input)
return -ENOMEM;
input[0] = U1_FEATURE_REPORT_ID;
if (read_flag) {
input[1] = U1_CMD_REGISTER_READ;
input[6] = 0x00;
} else {
input[1] = U1_CMD_REGISTER_WRITE;
input[6] = write_val;
}
put_unaligned_le32(address, input + 2);
/* Calculate the checksum */
check_sum = U1_FEATURE_REPORT_LEN_ALL;
for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
check_sum += input[i];
input[7] = check_sum;
ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
U1_FEATURE_REPORT_LEN,
HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
if (ret < 0) {
dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
goto exit;
}
if (read_flag) {
readbuf = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
if (!readbuf) {
kfree(input);
return -ENOMEM;
}
ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
U1_FEATURE_REPORT_LEN,
HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
if (ret < 0) {
dev_err(&hdev->dev, "failed read register (%d)\n", ret);
goto exit;
}
*read_val = readbuf[6];
kfree(readbuf);
}
ret = 0;
exit:
kfree(input);
return ret;
}
static int alps_raw_event(struct hid_device *hdev,
struct hid_report *report, u8 *data, int size)
{
unsigned int x, y, z;
int i;
short sp_x, sp_y;
struct u1_dev *hdata = hid_get_drvdata(hdev);
switch (data[0]) {
case U1_MOUSE_REPORT_ID:
break;
case U1_FEATURE_REPORT_ID:
break;
case U1_ABSOLUTE_REPORT_ID:
for (i = 0; i < MAX_TOUCHES; i++) {
u8 *contact = &data[i * 5];
x = get_unaligned_le16(contact + 3);
y = get_unaligned_le16(contact + 5);
z = contact[7] & 0x7F;
input_mt_slot(hdata->input, i);
if (z != 0) {
input_mt_report_slot_state(hdata->input,
MT_TOOL_FINGER, 1);
input_report_abs(hdata->input,
ABS_MT_POSITION_X, x);
input_report_abs(hdata->input,
ABS_MT_POSITION_Y, y);
input_report_abs(hdata->input,
ABS_MT_PRESSURE, z);
} else {
input_mt_report_slot_state(hdata->input,
MT_TOOL_FINGER, 0);
}
}
input_mt_sync_frame(hdata->input);
input_report_key(hdata->input, BTN_LEFT,
data[1] & 0x1);
input_report_key(hdata->input, BTN_RIGHT,
(data[1] & 0x2));
input_report_key(hdata->input, BTN_MIDDLE,
(data[1] & 0x4));
input_sync(hdata->input);
return 1;
case U1_SP_ABSOLUTE_REPORT_ID:
sp_x = get_unaligned_le16(data+2);
sp_y = get_unaligned_le16(data+4);
sp_x = sp_x / 8;
sp_y = sp_y / 8;
input_report_rel(hdata->input2, REL_X, sp_x);
input_report_rel(hdata->input2, REL_Y, sp_y);
input_report_key(hdata->input2, BTN_LEFT,
data[1] & 0x1);
input_report_key(hdata->input2, BTN_RIGHT,
(data[1] & 0x2));
input_report_key(hdata->input2, BTN_MIDDLE,
(data[1] & 0x4));
input_sync(hdata->input2);
return 1;
}
return 0;
}
#ifdef CONFIG_PM
static int alps_post_reset(struct hid_device *hdev)
{
return u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
NULL, U1_TP_ABS_MODE, false);
}
static int alps_post_resume(struct hid_device *hdev)
{
return u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
NULL, U1_TP_ABS_MODE, false);
}
#endif /* CONFIG_PM */
static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
{
struct u1_dev *data = hid_get_drvdata(hdev);
struct input_dev *input = hi->input, *input2;
struct u1_dev devInfo;
int ret;
int res_x, res_y, i;
data->input = input;
hid_dbg(hdev, "Opening low level driver\n");
ret = hid_hw_open(hdev);
if (ret)
return ret;
/* Allow incoming hid reports */
hid_device_io_start(hdev);
/* Device initialization */
ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
&devInfo.dev_ctrl, 0, true);
if (ret < 0) {
dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret);
goto exit;
}
devInfo.dev_ctrl &= ~U1_DISABLE_DEV;
devInfo.dev_ctrl |= U1_TP_ABS_MODE;
ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
NULL, devInfo.dev_ctrl, false);
if (ret < 0) {
dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret);
goto exit;
}
ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X,
&devInfo.sen_line_num_x, 0, true);
if (ret < 0) {
dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret);
goto exit;
}
ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y,
&devInfo.sen_line_num_y, 0, true);
if (ret < 0) {
dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret);
goto exit;
}
ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X,
&devInfo.pitch_x, 0, true);
if (ret < 0) {
dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret);
goto exit;
}
ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y,
&devInfo.pitch_y, 0, true);
if (ret < 0) {
dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret);
goto exit;
}
ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS,
&devInfo.resolution, 0, true);
if (ret < 0) {
dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret);
goto exit;
}
ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN,
&devInfo.btn_info, 0, true);
if (ret < 0) {
dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret);
goto exit;
}
/* Check StickPointer device */
ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP,
&devInfo.dev_type, 0, true);
if (ret < 0) {
dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret);
goto exit;
}
devInfo.x_active_len_mm =
(devInfo.pitch_x * (devInfo.sen_line_num_x - 1)) / 10;
devInfo.y_active_len_mm =
(devInfo.pitch_y * (devInfo.sen_line_num_y - 1)) / 10;
devInfo.x_max =
(devInfo.resolution << 2) * (devInfo.sen_line_num_x - 1);
devInfo.y_max =
(devInfo.resolution << 2) * (devInfo.sen_line_num_y - 1);
__set_bit(EV_ABS, input->evbit);
input_set_abs_params(input, ABS_MT_POSITION_X, 1, devInfo.x_max, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 1, devInfo.y_max, 0, 0);
if (devInfo.x_active_len_mm && devInfo.y_active_len_mm) {
res_x = (devInfo.x_max - 1) / devInfo.x_active_len_mm;
res_y = (devInfo.y_max - 1) / devInfo.y_active_len_mm;
input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
}
input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0);
input_mt_init_slots(input, MAX_TOUCHES, INPUT_MT_POINTER);
__set_bit(EV_KEY, input->evbit);
if ((devInfo.btn_info & 0x0F) == (devInfo.btn_info & 0xF0) >> 4) {
devInfo.btn_cnt = (devInfo.btn_info & 0x0F);
} else {
/* Button pad */
devInfo.btn_cnt = 1;
__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
}
for (i = 0; i < devInfo.btn_cnt; i++)
__set_bit(BTN_LEFT + i, input->keybit);
/* Stick device initialization */
if (devInfo.dev_type & U1_DEVTYPE_SP_SUPPORT) {
input2 = input_allocate_device();
if (!input2) {
input_free_device(input2);
goto exit;
}
data->input2 = input2;
devInfo.dev_ctrl |= U1_SP_ABS_MODE;
ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
NULL, devInfo.dev_ctrl, false);
if (ret < 0) {
dev_err(&hdev->dev, "failed SP mode (%d)\n", ret);
input_free_device(input2);
goto exit;
}
ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN,
&devInfo.sp_btn_info, 0, true);
if (ret < 0) {
dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret);
input_free_device(input2);
goto exit;
}
input2->phys = input->phys;
input2->name = "DualPoint Stick";
input2->id.bustype = BUS_I2C;
input2->id.vendor = input->id.vendor;
input2->id.product = input->id.product;
input2->id.version = input->id.version;
input2->dev.parent = input->dev.parent;
__set_bit(EV_KEY, input2->evbit);
devInfo.sp_btn_cnt = (devInfo.sp_btn_info & 0x0F);
for (i = 0; i < devInfo.sp_btn_cnt; i++)
__set_bit(BTN_LEFT + i, input2->keybit);
__set_bit(EV_REL, input2->evbit);
__set_bit(REL_X, input2->relbit);
__set_bit(REL_Y, input2->relbit);
__set_bit(INPUT_PROP_POINTER, input2->propbit);
__set_bit(INPUT_PROP_POINTING_STICK, input2->propbit);
if (input_register_device(data->input2)) {
input_free_device(input2);
goto exit;
}
}
exit:
hid_device_io_stop(hdev);
hid_hw_close(hdev);
return ret;
}
static int alps_input_mapping(struct hid_device *hdev,
struct hid_input *hi, struct hid_field *field,
struct hid_usage *usage, unsigned long **bit, int *max)
{
return -1;
}
static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
struct u1_dev *data = NULL;
int ret;
data = devm_kzalloc(&hdev->dev, sizeof(struct u1_dev), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->hdev = hdev;
hid_set_drvdata(hdev, data);
hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "parse failed\n");
return ret;
}
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret) {
hid_err(hdev, "hw start failed\n");
return ret;
}
return 0;
}
static void alps_remove(struct hid_device *hdev)
{
hid_hw_stop(hdev);
}
static const struct hid_device_id alps_id[] = {
{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
{ }
};
MODULE_DEVICE_TABLE(hid, alps_id);
static struct hid_driver alps_driver = {
.name = "hid-alps",
.id_table = alps_id,
.probe = alps_probe,
.remove = alps_remove,
.raw_event = alps_raw_event,
.input_mapping = alps_input_mapping,
.input_configured = alps_input_configured,
#ifdef CONFIG_PM
.resume = alps_post_resume,
.reset_resume = alps_post_reset,
#endif
};
module_hid_driver(alps_driver);
MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>");
MODULE_DESCRIPTION("ALPS HID driver");
MODULE_LICENSE("GPL");
|