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
35static __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
68static 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};
83MODULE_DEVICE_TABLE(hid, holtek_mouse_devices);
84
85static 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
91module_hid_driver(holtek_mouse_driver);
92MODULE_LICENSE("GPL");
93