1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * USB HID driver for Glorious PC Gaming Race
4 * Glorious Model O, O- and D mice.
5 *
6 * Copyright (c) 2020 Samuel Čavoj <sammko@sammserver.com>
7 */
8
9/*
10 */
11
12#include <linux/hid.h>
13#include <linux/module.h>
14
15#include "hid-ids.h"
16
17MODULE_AUTHOR("Samuel Čavoj <sammko@sammserver.com>");
18MODULE_DESCRIPTION("HID driver for Glorious PC Gaming Race mice");
19
20/*
21 * Glorious Model O and O- specify the const flag in the consumer input
22 * report descriptor, which leads to inputs being ignored. Fix this
23 * by patching the descriptor.
24 *
25 * Glorious Model I incorrectly specifes the Usage Minimum for its
26 * keyboard HID report, causing keycodes to be misinterpreted.
27 * Fix this by setting Usage Minimum to 0 in that report.
28 */
29static __u8 *glorious_report_fixup(struct hid_device *hdev, __u8 *rdesc,
30 unsigned int *rsize)
31{
32 if (*rsize == 213 &&
33 rdesc[84] == 129 && rdesc[112] == 129 && rdesc[140] == 129 &&
34 rdesc[85] == 3 && rdesc[113] == 3 && rdesc[141] == 3) {
35 hid_info(hdev, "patching Glorious Model O consumer control report descriptor\n");
36 rdesc[85] = rdesc[113] = rdesc[141] = \
37 HID_MAIN_ITEM_VARIABLE | HID_MAIN_ITEM_RELATIVE;
38 }
39 if (*rsize == 156 && rdesc[41] == 1) {
40 hid_info(hdev, "patching Glorious Model I keyboard report descriptor\n");
41 rdesc[41] = 0;
42 }
43 return rdesc;
44}
45
46static void glorious_update_name(struct hid_device *hdev)
47{
48 const char *model = "Device";
49
50 switch (hdev->product) {
51 case USB_DEVICE_ID_GLORIOUS_MODEL_O:
52 model = "Model O"; break;
53 case USB_DEVICE_ID_GLORIOUS_MODEL_D:
54 model = "Model D"; break;
55 case USB_DEVICE_ID_GLORIOUS_MODEL_I:
56 model = "Model I"; break;
57 }
58
59 snprintf(buf: hdev->name, size: sizeof(hdev->name), fmt: "%s %s", "Glorious", model);
60}
61
62static int glorious_probe(struct hid_device *hdev,
63 const struct hid_device_id *id)
64{
65 int ret;
66
67 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
68
69 ret = hid_parse(hdev);
70 if (ret)
71 return ret;
72
73 glorious_update_name(hdev);
74
75 return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
76}
77
78static const struct hid_device_id glorious_devices[] = {
79 { HID_USB_DEVICE(USB_VENDOR_ID_SINOWEALTH,
80 USB_DEVICE_ID_GLORIOUS_MODEL_O) },
81 { HID_USB_DEVICE(USB_VENDOR_ID_SINOWEALTH,
82 USB_DEVICE_ID_GLORIOUS_MODEL_D) },
83 { HID_USB_DEVICE(USB_VENDOR_ID_LAVIEW,
84 USB_DEVICE_ID_GLORIOUS_MODEL_I) },
85 { }
86};
87MODULE_DEVICE_TABLE(hid, glorious_devices);
88
89static struct hid_driver glorious_driver = {
90 .name = "glorious",
91 .id_table = glorious_devices,
92 .probe = glorious_probe,
93 .report_fixup = glorious_report_fixup
94};
95
96module_hid_driver(glorious_driver);
97
98MODULE_LICENSE("GPL");
99

source code of linux/drivers/hid/hid-glorious.c