Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  HID driver for Speedlink Vicious and Divine Cezanne (USB mouse).
 *  Fixes "jumpy" cursor and removes nonexistent keyboard LEDS from
 *  the HID descriptor.
 *
 *  Copyright (c) 2011, 2013 Stefan Kriwanek <dev@stefankriwanek.de>
 */
 
/*
 */
 
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>
 
#include "hid-ids.h"
 
static const struct hid_device_id speedlink_devices[] = {
<------>{ HID_USB_DEVICE(USB_VENDOR_ID_X_TENSIONS, USB_DEVICE_ID_SPEEDLINK_VAD_CEZANNE)},
<------>{ }
};
 
static int speedlink_input_mapping(struct hid_device *hdev,
<------><------>struct hid_input *hi,
<------><------>struct hid_field *field, struct hid_usage *usage,
<------><------>unsigned long **bit, int *max)
{
<------>/*
<------> * The Cezanne mouse has a second "keyboard" USB endpoint for it is
<------> * able to map keyboard events to the button presses.
<------> * It sends a standard keyboard report descriptor, though, whose
<------> * LEDs we ignore.
<------> */
<------>switch (usage->hid & HID_USAGE_PAGE) {
<------>case HID_UP_LED:
<------><------>return -1;
<------>}
<------>return 0;
}
 
static int speedlink_event(struct hid_device *hdev, struct hid_field *field,
<------><------>struct hid_usage *usage, __s32 value)
{
<------>/* No other conditions due to usage_table. */
 
<------>/* This fixes the "jumpy" cursor occuring due to invalid events sent
<------> * by the device. Some devices only send them with value==+256, others
<------> * don't. However, catching abs(value)>=256 is restrictive enough not
<------> * to interfere with devices that were bug-free (has been tested).
<------> */
<------>if (abs(value) >= 256)
<------><------>return 1;
<------>/* Drop useless distance 0 events (on button clicks etc.) as well */
<------>if (value == 0)
<------><------>return 1;
 
<------>return 0;
}
 
MODULE_DEVICE_TABLE(hid, speedlink_devices);
 
static const struct hid_usage_id speedlink_grabbed_usages[] = {
<------>{ HID_GD_X, EV_REL, 0 },
<------>{ HID_GD_Y, EV_REL, 1 },
<------>{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
};
 
static struct hid_driver speedlink_driver = {
<------>.name = "speedlink",
<------>.id_table = speedlink_devices,
<------>.usage_table = speedlink_grabbed_usages,
<------>.input_mapping = speedlink_input_mapping,
<------>.event = speedlink_event,
};
module_hid_driver(speedlink_driver);
 
MODULE_LICENSE("GPL");