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