MTD: merge 3.18 development into -next development
[linux-2.6-microblaze.git] / drivers / hid / hid-holtek-mouse.c
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");