linux/drivers/hid/hid-holtek-mouse.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * HID driver for Holtek gaming mice
 * Copyright (c) 2013 Christian Ohm
 * Heavily inspired by various other HID drivers that adjust the report
 * descriptor.
*/

/*
 */

#include <linux/hid.h>
#include <linux/module.h>
#include <linux/usb.h>

#include "hid-ids.h"

/*
 * The report descriptor of some Holtek based gaming mice specifies an
 * excessively large number of consumer usages (2^15), which is more than
 * HID_MAX_USAGES. This prevents proper parsing of the report descriptor.
 *
 * This driver fixes the report descriptor for:
 * - USB ID 04d9:a067, sold as Sharkoon Drakonia and Perixx MX-2000
 * - USB ID 04d9:a04a, sold as Tracer Sniper TRM-503, NOVA Gaming Slider X200
 *   and Zalman ZM-GM1
 * - USB ID 04d9:a081, sold as SHARKOON DarkGlider Gaming mouse
 * - USB ID 04d9:a072, sold as LEETGION Hellion Gaming Mouse
 * - USB ID 04d9:a0c2, sold as ETEKCITY Scroll T-140 Gaming Mouse
 */

static __u8 *holtek_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
		unsigned int *rsize)
{ … }

static int holtek_mouse_probe(struct hid_device *hdev,
			      const struct hid_device_id *id)
{ … }

static const struct hid_device_id holtek_mouse_devices[] = …;
MODULE_DEVICE_TABLE(hid, holtek_mouse_devices);

static struct hid_driver holtek_mouse_driver = …;

module_hid_driver(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;