1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * HID driver for ViewSonic devices not fully compliant with HID standard |
4 | * |
5 | * Copyright (c) 2017 Nikolai Kondrashov |
6 | */ |
7 | |
8 | /* |
9 | * This program is free software; you can redistribute it and/or modify it |
10 | * under the terms of the GNU General Public License as published by the Free |
11 | * Software Foundation; either version 2 of the License, or (at your option) |
12 | * any later version. |
13 | */ |
14 | |
15 | #include <linux/device.h> |
16 | #include <linux/hid.h> |
17 | #include <linux/module.h> |
18 | |
19 | #include "hid-ids.h" |
20 | |
21 | /* Size of the original descriptor of PD1011 signature pad */ |
22 | #define PD1011_RDESC_ORIG_SIZE 408 |
23 | |
24 | /* Fixed report descriptor of PD1011 signature pad */ |
25 | static __u8 pd1011_rdesc_fixed[] = { |
26 | 0x05, 0x0D, /* Usage Page (Digitizer), */ |
27 | 0x09, 0x01, /* Usage (Digitizer), */ |
28 | 0xA1, 0x01, /* Collection (Application), */ |
29 | 0x85, 0x02, /* Report ID (2), */ |
30 | 0x09, 0x20, /* Usage (Stylus), */ |
31 | 0xA0, /* Collection (Physical), */ |
32 | 0x75, 0x10, /* Report Size (16), */ |
33 | 0x95, 0x01, /* Report Count (1), */ |
34 | 0xA4, /* Push, */ |
35 | 0x05, 0x01, /* Usage Page (Desktop), */ |
36 | 0x65, 0x13, /* Unit (Inch), */ |
37 | 0x55, 0xFD, /* Unit Exponent (-3), */ |
38 | 0x34, /* Physical Minimum (0), */ |
39 | 0x09, 0x30, /* Usage (X), */ |
40 | 0x46, 0x5D, 0x21, /* Physical Maximum (8541), */ |
41 | 0x27, 0x80, 0xA9, |
42 | 0x00, 0x00, /* Logical Maximum (43392), */ |
43 | 0x81, 0x02, /* Input (Variable), */ |
44 | 0x09, 0x31, /* Usage (Y), */ |
45 | 0x46, 0xDA, 0x14, /* Physical Maximum (5338), */ |
46 | 0x26, 0xF0, 0x69, /* Logical Maximum (27120), */ |
47 | 0x81, 0x02, /* Input (Variable), */ |
48 | 0xB4, /* Pop, */ |
49 | 0x14, /* Logical Minimum (0), */ |
50 | 0x25, 0x01, /* Logical Maximum (1), */ |
51 | 0x75, 0x01, /* Report Size (1), */ |
52 | 0x95, 0x01, /* Report Count (1), */ |
53 | 0x81, 0x03, /* Input (Constant, Variable), */ |
54 | 0x09, 0x32, /* Usage (In Range), */ |
55 | 0x09, 0x42, /* Usage (Tip Switch), */ |
56 | 0x95, 0x02, /* Report Count (2), */ |
57 | 0x81, 0x02, /* Input (Variable), */ |
58 | 0x95, 0x05, /* Report Count (5), */ |
59 | 0x81, 0x03, /* Input (Constant, Variable), */ |
60 | 0x75, 0x10, /* Report Size (16), */ |
61 | 0x95, 0x01, /* Report Count (1), */ |
62 | 0x09, 0x30, /* Usage (Tip Pressure), */ |
63 | 0x15, 0x05, /* Logical Minimum (5), */ |
64 | 0x26, 0xFF, 0x07, /* Logical Maximum (2047), */ |
65 | 0x81, 0x02, /* Input (Variable), */ |
66 | 0x75, 0x10, /* Report Size (16), */ |
67 | 0x95, 0x01, /* Report Count (1), */ |
68 | 0x81, 0x03, /* Input (Constant, Variable), */ |
69 | 0xC0, /* End Collection, */ |
70 | 0xC0 /* End Collection */ |
71 | }; |
72 | |
73 | static __u8 *viewsonic_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
74 | unsigned int *rsize) |
75 | { |
76 | switch (hdev->product) { |
77 | case USB_DEVICE_ID_VIEWSONIC_PD1011: |
78 | case USB_DEVICE_ID_SIGNOTEC_VIEWSONIC_PD1011: |
79 | if (*rsize == PD1011_RDESC_ORIG_SIZE) { |
80 | rdesc = pd1011_rdesc_fixed; |
81 | *rsize = sizeof(pd1011_rdesc_fixed); |
82 | } |
83 | break; |
84 | } |
85 | |
86 | return rdesc; |
87 | } |
88 | |
89 | static const struct hid_device_id viewsonic_devices[] = { |
90 | { HID_USB_DEVICE(USB_VENDOR_ID_VIEWSONIC, |
91 | USB_DEVICE_ID_VIEWSONIC_PD1011) }, |
92 | { HID_USB_DEVICE(USB_VENDOR_ID_SIGNOTEC, |
93 | USB_DEVICE_ID_SIGNOTEC_VIEWSONIC_PD1011) }, |
94 | { } |
95 | }; |
96 | MODULE_DEVICE_TABLE(hid, viewsonic_devices); |
97 | |
98 | static struct hid_driver viewsonic_driver = { |
99 | .name = "viewsonic" , |
100 | .id_table = viewsonic_devices, |
101 | .report_fixup = viewsonic_report_fixup, |
102 | }; |
103 | module_hid_driver(viewsonic_driver); |
104 | |
105 | MODULE_LICENSE("GPL" ); |
106 | |