cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

hid-xinmo.c (1395B)

      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 */
     25static 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
     44static 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
     50MODULE_DEVICE_TABLE(hid, xinmo_devices);
     51
     52static struct hid_driver xinmo_driver = {
     53	.name = "xinmo",
     54	.id_table = xinmo_devices,
     55	.event = xinmo_event
     56};
     57
     58module_hid_driver(xinmo_driver);
     59MODULE_LICENSE("GPL");