1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * HID driver for Keytouch devices not fully compliant with HID standard
4 *
5 * Copyright (c) 2011 Jiri Kosina
6 */
7
8/*
9 */
10
11#include <linux/device.h>
12#include <linux/hid.h>
13#include <linux/module.h>
14
15#include "hid-ids.h"
16
17/* Replace the broken report descriptor of this device with rather
18 * a default one */
19static const __u8 keytouch_fixed_rdesc[] = {
200x05, 0x01, 0x09, 0x06, 0xa1, 0x01, 0x05, 0x07, 0x19, 0xe0, 0x29, 0xe7, 0x15,
210x00, 0x25, 0x01, 0x75, 0x01, 0x95, 0x08, 0x81, 0x02, 0x95, 0x01, 0x75, 0x08,
220x81, 0x01, 0x95, 0x03, 0x75, 0x01, 0x05, 0x08, 0x19, 0x01, 0x29, 0x03, 0x91,
230x02, 0x95, 0x05, 0x75, 0x01, 0x91, 0x01, 0x95, 0x06, 0x75, 0x08, 0x15, 0x00,
240x26, 0xff, 0x00, 0x05, 0x07, 0x19, 0x00, 0x2a, 0xff, 0x00, 0x81, 0x00, 0xc0
25};
26
27static const __u8 *keytouch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
28 unsigned int *rsize)
29{
30 hid_info(hdev, "fixing up Keytouch IEC report descriptor\n");
31
32 *rsize = sizeof(keytouch_fixed_rdesc);
33 return keytouch_fixed_rdesc;
34}
35
36static const struct hid_device_id keytouch_devices[] = {
37 { HID_USB_DEVICE(USB_VENDOR_ID_KEYTOUCH, USB_DEVICE_ID_KEYTOUCH_IEC) },
38 { }
39};
40MODULE_DEVICE_TABLE(hid, keytouch_devices);
41
42static struct hid_driver keytouch_driver = {
43 .name = "keytouch",
44 .id_table = keytouch_devices,
45 .report_fixup = keytouch_report_fixup,
46};
47module_hid_driver(keytouch_driver);
48
49MODULE_DESCRIPTION("HID driver for Keytouch devices not fully compliant with HID standard");
50MODULE_LICENSE("GPL");
51MODULE_AUTHOR("Jiri Kosina");
52

source code of linux/drivers/hid/hid-keytouch.c