1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * HID driver for Holtek gaming mice |
4 | * Copyright (c) 2013 Christian Ohm |
5 | * Heavily inspired by various other HID drivers that adjust the report |
6 | * descriptor. |
7 | */ |
8 | |
9 | /* |
10 | */ |
11 | |
12 | #include <linux/hid.h> |
13 | #include <linux/module.h> |
14 | #include <linux/usb.h> |
15 | |
16 | #include "hid-ids.h" |
17 | |
18 | /* |
19 | * The report descriptor of some Holtek based gaming mice specifies an |
20 | * excessively large number of consumer usages (2^15), which is more than |
21 | * HID_MAX_USAGES. This prevents proper parsing of the report descriptor. |
22 | * |
23 | * This driver fixes the report descriptor for: |
24 | * - USB ID 04d9:a067, sold as Sharkoon Drakonia and Perixx MX-2000 |
25 | * - USB ID 04d9:a04a, sold as Tracer Sniper TRM-503, NOVA Gaming Slider X200 |
26 | * and Zalman ZM-GM1 |
27 | * - USB ID 04d9:a081, sold as SHARKOON DarkGlider Gaming mouse |
28 | * - USB ID 04d9:a072, sold as LEETGION Hellion Gaming Mouse |
29 | * - USB ID 04d9:a0c2, sold as ETEKCITY Scroll T-140 Gaming Mouse |
30 | */ |
31 | |
32 | static __u8 *holtek_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
33 | unsigned int *rsize) |
34 | { |
35 | struct usb_interface *intf = to_usb_interface(hdev->dev.parent); |
36 | |
37 | if (intf->cur_altsetting->desc.bInterfaceNumber == 1) { |
38 | /* Change usage maximum and logical maximum from 0x7fff to |
39 | * 0x2fff, so they don't exceed HID_MAX_USAGES */ |
40 | switch (hdev->product) { |
41 | case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067: |
42 | case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072: |
43 | case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2: |
44 | if (*rsize >= 122 && rdesc[115] == 0xff && rdesc[116] == 0x7f |
45 | && rdesc[120] == 0xff && rdesc[121] == 0x7f) { |
46 | hid_info(hdev, "Fixing up report descriptor\n" ); |
47 | rdesc[116] = rdesc[121] = 0x2f; |
48 | } |
49 | break; |
50 | case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A: |
51 | case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070: |
52 | case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081: |
53 | if (*rsize >= 113 && rdesc[106] == 0xff && rdesc[107] == 0x7f |
54 | && rdesc[111] == 0xff && rdesc[112] == 0x7f) { |
55 | hid_info(hdev, "Fixing up report descriptor\n" ); |
56 | rdesc[107] = rdesc[112] = 0x2f; |
57 | } |
58 | break; |
59 | } |
60 | |
61 | } |
62 | return rdesc; |
63 | } |
64 | |
65 | static int holtek_mouse_probe(struct hid_device *hdev, |
66 | const struct hid_device_id *id) |
67 | { |
68 | int ret; |
69 | |
70 | if (!hid_is_usb(hdev)) |
71 | return -EINVAL; |
72 | |
73 | ret = hid_parse(hdev); |
74 | if (ret) { |
75 | hid_err(hdev, "hid parse failed: %d\n" , ret); |
76 | return ret; |
77 | } |
78 | |
79 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
80 | if (ret) { |
81 | hid_err(hdev, "hw start failed: %d\n" , ret); |
82 | return ret; |
83 | } |
84 | |
85 | return 0; |
86 | } |
87 | |
88 | static const struct hid_device_id holtek_mouse_devices[] = { |
89 | { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, |
90 | USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) }, |
91 | { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, |
92 | USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070) }, |
93 | { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, |
94 | USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) }, |
95 | { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, |
96 | USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072) }, |
97 | { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, |
98 | USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081) }, |
99 | { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, |
100 | USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2) }, |
101 | { } |
102 | }; |
103 | MODULE_DEVICE_TABLE(hid, holtek_mouse_devices); |
104 | |
105 | static struct hid_driver holtek_mouse_driver = { |
106 | .name = "holtek_mouse" , |
107 | .id_table = holtek_mouse_devices, |
108 | .report_fixup = holtek_mouse_report_fixup, |
109 | .probe = holtek_mouse_probe, |
110 | }; |
111 | |
112 | module_hid_driver(holtek_mouse_driver); |
113 | MODULE_LICENSE("GPL" ); |
114 | |