LXR linux/drivers/hid/hid-xinmo.c

   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");
  60