1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * HID driver for Topre REALFORCE Keyboards 4 * 5 * Copyright (c) 2022 Harry Stern <harry@harrystern.net> 6 * 7 * Based on the hid-macally driver 8 */ 9 10 #include <linux/hid.h> 11 #include <linux/module.h> 12 13 #include "hid-ids.h" 14 15 MODULE_AUTHOR("Harry Stern <harry@harrystern.net>"); 16 MODULE_DESCRIPTION("REALFORCE R2 Keyboard driver"); 17 MODULE_LICENSE("GPL"); 18 19 /* 20 * Fix the REALFORCE R2's non-boot interface's report descriptor to match the 21 * events it's actually sending. It claims to send array events but is instead 22 * sending variable events. 23 */ 24 static __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 36 static 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 { } 40 }; 41 MODULE_DEVICE_TABLE(hid, topre_id_table); 42 43 static struct hid_driver topre_driver = { 44 .name = "topre", 45 .id_table = topre_id_table, 46 .report_fixup = topre_report_fixup, 47 }; 48 49 module_hid_driver(topre_driver); 50