1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 *  HID driver for various devices which are apparently based on the same chipset
4 *  from certain vendor which produces chips that contain wrong LogicalMaximum
5 *  value in their HID report descriptor. Currently supported devices are:
6 *
7 *    Ortek PKB-1700
8 *    Ortek WKB-2000
9 *    iHome IMAC-A210S
10 *    Skycable wireless presenter
11 *
12 *  Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
13 *  Copyright (c) 2011 Jiri Kosina
14 */
15
16/*
17 */
18
19#include <linux/device.h>
20#include <linux/hid.h>
21#include <linux/module.h>
22
23#include "hid-ids.h"
24
25static __u8 *ortek_report_fixup(struct hid_device *hdev, __u8 *rdesc,
26		unsigned int *rsize)
27{
28	if (*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x01) {
29		hid_info(hdev, "Fixing up logical maximum in report descriptor (Ortek)\n");
30		rdesc[55] = 0x92;
31	} else if (*rsize >= 54 && rdesc[52] == 0x25 && rdesc[53] == 0x01) {
32		hid_info(hdev, "Fixing up logical maximum in report descriptor (Skycable)\n");
33		rdesc[53] = 0x65;
34	}
35	return rdesc;
36}
37
38static const struct hid_device_id ortek_devices[] = {
39	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
40	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
41	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_IHOME_IMAC_A210S) },
42	{ HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) },
43	{ }
44};
45MODULE_DEVICE_TABLE(hid, ortek_devices);
46
47static struct hid_driver ortek_driver = {
48	.name = "ortek",
49	.id_table = ortek_devices,
50	.report_fixup = ortek_report_fixup
51};
52module_hid_driver(ortek_driver);
53
54MODULE_LICENSE("GPL");
55