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1// SPDX-License-Identifier: GPL-2.0+2/*3 * HID driver for Topre REALFORCE Keyboards4 *5 * Copyright (c) 2022 Harry Stern <harry@harrystern.net>6 *7 * Based on the hid-macally driver8 */9 10#include <linux/hid.h>11#include <linux/module.h>12 13#include "hid-ids.h"14 15MODULE_AUTHOR("Harry Stern <harry@harrystern.net>");16MODULE_DESCRIPTION("REALFORCE R2 Keyboard driver");17MODULE_LICENSE("GPL");18 19/*20 * Fix the REALFORCE R2's non-boot interface's report descriptor to match the21 * events it's actually sending. It claims to send array events but is instead22 * sending variable events.23 */24static const __u8 *topre_report_fixup(struct hid_device *hdev, __u8 *rdesc,25 unsigned int *rsize)26{27 if (*rsize >= 119 && rdesc[69] == 0x29 && rdesc[70] == 0xe7 &&28 rdesc[71] == 0x81 && rdesc[72] == 0x00) {29 hid_info(hdev,30 "fixing up Topre REALFORCE keyboard report descriptor\n");31 rdesc[72] = 0x02;32 }33 return rdesc;34}35 36static const struct hid_device_id topre_id_table[] = {37 { HID_USB_DEVICE(USB_VENDOR_ID_TOPRE,38 USB_DEVICE_ID_TOPRE_REALFORCE_R2_108) },39 { HID_USB_DEVICE(USB_VENDOR_ID_TOPRE,40 USB_DEVICE_ID_TOPRE_REALFORCE_R2_87) },41 { }42};43MODULE_DEVICE_TABLE(hid, topre_id_table);44 45static struct hid_driver topre_driver = {46 .name = "topre",47 .id_table = topre_id_table,48 .report_fixup = topre_report_fixup,49};50 51module_hid_driver(topre_driver);52