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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* HID driver for some cypress "special" devices
*
* Copyright (c) 1999 Andreas Gal
* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
* Copyright (c) 2006-2007 Jiri Kosina
* Copyright (c) 2008 Jiri Slaby
*/
/*
*/
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/input.h>
#include <linux/module.h>
#include "hid-ids.h"
#define CP_RDESC_SWAPPED_MIN_MAX 0x01
#define CP_2WHEEL_MOUSE_HACK 0x02
#define CP_2WHEEL_MOUSE_HACK_ON 0x04
#define VA_INVAL_LOGICAL_BOUNDARY 0x08
/*
* Some USB barcode readers from cypress have usage min and usage max in
* the wrong order
*/
static __u8 *cp_rdesc_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
unsigned int i;
if (*rsize < 4)
return rdesc;
for (i = 0; i < *rsize - 4; i++)
if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) {
rdesc[i] = 0x19;
rdesc[i + 2] = 0x29;
swap(rdesc[i + 3], rdesc[i + 1]);
}
return rdesc;
}
static __u8 *va_logical_boundary_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
/*
* Varmilo VA104M (with VID Cypress and device ID 07B1) incorrectly
* reports Logical Minimum of its Consumer Control device as 572
* (0x02 0x3c). Fix this by setting its Logical Minimum to zero.
*/
if (*rsize == 25 &&
rdesc[0] == 0x05 && rdesc[1] == 0x0c &&
rdesc[2] == 0x09 && rdesc[3] == 0x01 &&
rdesc[6] == 0x19 && rdesc[7] == 0x00 &&
rdesc[11] == 0x16 && rdesc[12] == 0x3c && rdesc[13] == 0x02) {
hid_info(hdev,
"fixing up varmilo VA104M consumer control report descriptor\n");
rdesc[12] = 0x00;
rdesc[13] = 0x00;
}
return rdesc;
}
static const __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
if (quirks & CP_RDESC_SWAPPED_MIN_MAX)
rdesc = cp_rdesc_fixup(hdev, rdesc, rsize);
if (quirks & VA_INVAL_LOGICAL_BOUNDARY)
rdesc = va_logical_boundary_fixup(hdev, rdesc, rsize);
return rdesc;
}
static int cp_input_mapped(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
if (!(quirks & CP_2WHEEL_MOUSE_HACK))
return 0;
if (usage->type == EV_REL && usage->code == REL_WHEEL)
set_bit(REL_HWHEEL, *bit);
if (usage->hid == 0x00090005)
return -1;
return 0;
}
static int cp_event(struct hid_device *hdev, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
!usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK))
return 0;
if (usage->hid == 0x00090005) {
if (value)
quirks |= CP_2WHEEL_MOUSE_HACK_ON;
else
quirks &= ~CP_2WHEEL_MOUSE_HACK_ON;
hid_set_drvdata(hdev, (void *)quirks);
return 1;
}
if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) {
struct input_dev *input = field->hidinput->input;
input_event(input, usage->type, REL_HWHEEL, value);
return 1;
}
return 0;
}
static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
unsigned long quirks = id->driver_data;
int ret;
hid_set_drvdata(hdev, (void *)quirks);
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "parse failed\n");
goto err_free;
}
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret) {
hid_err(hdev, "hw start failed\n");
goto err_free;
}
return 0;
err_free:
return ret;
}
static const struct hid_device_id cp_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1),
.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2),
.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3),
.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4),
.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE),
.driver_data = CP_2WHEEL_MOUSE_HACK },
{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_VARMILO_VA104M_07B1),
.driver_data = VA_INVAL_LOGICAL_BOUNDARY },
{ }
};
MODULE_DEVICE_TABLE(hid, cp_devices);
static struct hid_driver cp_driver = {
.name = "cypress",
.id_table = cp_devices,
.report_fixup = cp_report_fixup,
.input_mapped = cp_input_mapped,
.event = cp_event,
.probe = cp_probe,
};
module_hid_driver(cp_driver);
MODULE_DESCRIPTION("HID driver for some cypress \"special\" devices");
MODULE_LICENSE("GPL");
|
