/* * HID driver for Redragon keyboards * * Copyright (c) 2017 Robert Munteanu * SPDX-License-Identifier: GPL-2.0+ */ /* * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. */ #include <linux/device.h> #include <linux/hid.h> #include <linux/module.h> #include "hid-ids.h" /* * The Redragon Asura keyboard sends an incorrect HID descriptor. * At byte 100 it contains * * 0x81, 0x00 * * which is Input (Data, Arr, Abs), but it should be * * 0x81, 0x02 * * which is Input (Data, Var, Abs), which is consistent with the way * key codes are generated. */ static __u8 *redragon_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize) { if (*rsize >= 102 && rdesc[100] == 0x81 && rdesc[101] == 0x00) { dev_info(&hdev->dev, "Fixing Redragon ASURA report descriptor.\n"); rdesc[101] = 0x02; } return rdesc; } static const struct hid_device_id redragon_devices[] = { {HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_REDRAGON_ASURA)}, {} }; MODULE_DEVICE_TABLE(hid, redragon_devices); static struct hid_driver redragon_driver = { .name = "redragon", .id_table = redragon_devices, .report_fixup = redragon_report_fixup }; module_hid_driver(redragon_driver); MODULE_DESCRIPTION("HID driver for Redragon keyboards"); MODULE_LICENSE("GPL");