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 14 static __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 27 static const struct hid_device_id semitek_devices[] = { 28 { HID_USB_DEVICE(USB_VENDOR_ID_SEMITEK, USB_DEVICE_ID_SEMITEK_KEYBOARD) }, 29 { } 30 }; 31 MODULE_DEVICE_TABLE(hid, semitek_devices); 32 33 static struct hid_driver semitek_driver = { 34 .name = "semitek", 35 .id_table = semitek_devices, 36 .report_fixup = semitek_report_fixup, 37 }; 38 module_hid_driver(semitek_driver); 39 40 MODULE_DESCRIPTION("HID driver for Semitek keyboards"); 41 MODULE_LICENSE("GPL"); 42