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
27static __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
40static 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};
46MODULE_DEVICE_TABLE(hid, ortek_devices);
47
48static struct hid_driver ortek_driver = {
49	.name = "ortek",
50	.id_table = ortek_devices,
51	.report_fixup = ortek_report_fixup
52};
53module_hid_driver(ortek_driver);
54
55MODULE_LICENSE("GPL");
56