1 /*
2 * HID driver for various devices which are apparently based on the same chipset
3 * from certain vendor which produces chips that contain wrong LogicalMaximum
4 * value in their HID report descriptor. Currently supported devices are:
5 *
6 * Ortek PKB-1700
7 * Ortek WKB-2000
8 * Skycable wireless presenter
9 *
10 * Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
11 * Copyright (c) 2011 Jiri Kosina
12 */
13
14 /*
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the Free
17 * Software Foundation; either version 2 of the License, or (at your option)
18 * any later version.
19 */
20
21 #include <linux/device.h>
22 #include <linux/hid.h>
23 #include <linux/module.h>
24
25 #include "hid-ids.h"
26
ortek_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * rsize)27 static __u8 *ortek_report_fixup(struct hid_device *hdev, __u8 *rdesc,
28 unsigned int *rsize)
29 {
30 if (*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x01) {
31 hid_info(hdev, "Fixing up logical minimum in report descriptor (Ortek)\n");
32 rdesc[55] = 0x92;
33 } else if (*rsize >= 54 && rdesc[52] == 0x25 && rdesc[53] == 0x01) {
34 hid_info(hdev, "Fixing up logical minimum in report descriptor (Skycable)\n");
35 rdesc[53] = 0x65;
36 }
37 return rdesc;
38 }
39
40 static const struct hid_device_id ortek_devices[] = {
41 { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
42 { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
43 { HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) },
44 { }
45 };
46 MODULE_DEVICE_TABLE(hid, ortek_devices);
47
48 static struct hid_driver ortek_driver = {
49 .name = "ortek",
50 .id_table = ortek_devices,
51 .report_fixup = ortek_report_fixup
52 };
53
ortek_init(void)54 static int __init ortek_init(void)
55 {
56 return hid_register_driver(&ortek_driver);
57 }
58
ortek_exit(void)59 static void __exit ortek_exit(void)
60 {
61 hid_unregister_driver(&ortek_driver);
62 }
63
64 module_init(ortek_init);
65 module_exit(ortek_exit);
66 MODULE_LICENSE("GPL");
67