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
ortek_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * rsize)25 static __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
38 static 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 };
45 MODULE_DEVICE_TABLE(hid, ortek_devices);
46
47 static struct hid_driver ortek_driver = {
48 .name = "ortek",
49 .id_table = ortek_devices,
50 .report_fixup = ortek_report_fixup
51 };
52 module_hid_driver(ortek_driver);
53
54 MODULE_LICENSE("GPL");
55