1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 *  HID driver for Semitek keyboards
4 *
5 *  Copyright (c) 2021 Benjamin Moody
6 */
7
8#include <linux/device.h>
9#include <linux/hid.h>
10#include <linux/module.h>
11
12#include "hid-ids.h"
13
14static __u8 *semitek_report_fixup(struct hid_device *hdev, __u8 *rdesc,
15                                  unsigned int *rsize)
16{
17	/* In the report descriptor for interface 2, fix the incorrect
18	   description of report ID 0x04 (the report contains a
19	   bitmask, not an array of keycodes.) */
20	if (*rsize == 0xcb && rdesc[0x83] == 0x81 && rdesc[0x84] == 0x00) {
21		hid_info(hdev, "fixing up Semitek report descriptor\n");
22		rdesc[0x84] = 0x02;
23	}
24	return rdesc;
25}
26
27static const struct hid_device_id semitek_devices[] = {
28	{ HID_USB_DEVICE(USB_VENDOR_ID_SEMITEK, USB_DEVICE_ID_SEMITEK_KEYBOARD) },
29	{ }
30};
31MODULE_DEVICE_TABLE(hid, semitek_devices);
32
33static struct hid_driver semitek_driver = {
34	.name = "semitek",
35	.id_table = semitek_devices,
36	.report_fixup = semitek_report_fixup,
37};
38module_hid_driver(semitek_driver);
39
40MODULE_LICENSE("GPL");
41