1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * HID driver for Xin-Mo devices, currently only the Dual Arcade controller. 4 * Fixes the negative axis event values (the devices sends -2) to match the 5 * logical axis minimum of the HID report descriptor (the report announces 6 * -1). It is needed because hid-input discards out of bounds values. 7 * (This module is based on "hid-saitek" and "hid-lg".) 8 * 9 * Copyright (c) 2013 Olivier Scherler 10 */ 11 12 /* 13 */ 14 15 #include <linux/device.h> 16 #include <linux/hid.h> 17 #include <linux/module.h> 18 #include <linux/kernel.h> 19 20 #include "hid-ids.h" 21 22 /* 23 * Fix negative events that are out of bounds. 24 */ 25 static int xinmo_event(struct hid_device *hdev, struct hid_field *field, 26 struct hid_usage *usage, __s32 value) 27 { 28 switch (usage->code) { 29 case ABS_X: 30 case ABS_Y: 31 case ABS_Z: 32 case ABS_RX: 33 if (value < -1) { 34 input_event(field->hidinput->input, usage->type, 35 usage->code, -1); 36 return 1; 37 } 38 break; 39 } 40 41 return 0; 42 } 43 44 static const struct hid_device_id xinmo_devices[] = { 45 { HID_USB_DEVICE(USB_VENDOR_ID_XIN_MO, USB_DEVICE_ID_XIN_MO_DUAL_ARCADE) }, 46 { HID_USB_DEVICE(USB_VENDOR_ID_XIN_MO, USB_DEVICE_ID_THT_2P_ARCADE) }, 47 { } 48 }; 49 50 MODULE_DEVICE_TABLE(hid, xinmo_devices); 51 52 static struct hid_driver xinmo_driver = { 53 .name = "xinmo", 54 .id_table = xinmo_devices, 55 .event = xinmo_event 56 }; 57 58 module_hid_driver(xinmo_driver); 59 MODULE_LICENSE("GPL"); 60