1 /* 2 * HID driver for Xin-Mo devices, currently only the Dual Arcade controller. 3 * Fixes the negative axis event values (the devices sends -2) to match the 4 * logical axis minimum of the HID report descriptor (the report announces 5 * -1). It is needed because hid-input discards out of bounds values. 6 * (This module is based on "hid-saitek" and "hid-lg".) 7 * 8 * Copyright (c) 2013 Olivier Scherler 9 */ 10 11 /* 12 * This program is free software; you can redistribute it and/or modify it 13 * under the terms of the GNU General Public License as published by the Free 14 * Software Foundation; either version 2 of the License, or (at your option) 15 * any later version. 16 */ 17 18 #include <linux/device.h> 19 #include <linux/hid.h> 20 #include <linux/module.h> 21 #include <linux/kernel.h> 22 23 #include "hid-ids.h" 24 25 /* 26 * Fix negative events that are out of bounds. 27 */ 28 static int xinmo_event(struct hid_device *hdev, struct hid_field *field, 29 struct hid_usage *usage, __s32 value) 30 { 31 switch (usage->code) { 32 case ABS_X: 33 case ABS_Y: 34 case ABS_Z: 35 case ABS_RX: 36 if (value < -1) { 37 input_event(field->hidinput->input, usage->type, 38 usage->code, -1); 39 return 1; 40 } 41 break; 42 } 43 44 return 0; 45 } 46 47 static const struct hid_device_id xinmo_devices[] = { 48 { HID_USB_DEVICE(USB_VENDOR_ID_XIN_MO, USB_DEVICE_ID_XIN_MO_DUAL_ARCADE) }, 49 { } 50 }; 51 52 MODULE_DEVICE_TABLE(hid, xinmo_devices); 53 54 static struct hid_driver xinmo_driver = { 55 .name = "xinmo", 56 .id_table = xinmo_devices, 57 .event = xinmo_event 58 }; 59 60 module_hid_driver(xinmo_driver); 61 MODULE_LICENSE("GPL"); 62