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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 *  HID driver for various devices which are apparently based on the same chipset4 *  from certain vendor which produces chips that contain wrong LogicalMaximum5 *  value in their HID report descriptor. Currently supported devices are:6 *7 *    Ortek PKB-17008 *    Ortek WKB-20009 *    iHome IMAC-A210S10 *    Skycable wireless presenter11 *12 *  Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>13 *  Copyright (c) 2011 Jiri Kosina14 */15 16/*17 */18 19#include <linux/device.h>20#include <linux/hid.h>21#include <linux/module.h>22 23#include "hid-ids.h"24 25static const __u8 *ortek_report_fixup(struct hid_device *hdev, __u8 *rdesc,26		unsigned int *rsize)27{28	if (*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x01) {29		hid_info(hdev, "Fixing up logical maximum in report descriptor (Ortek)\n");30		rdesc[55] = 0x92;31	} else if (*rsize >= 54 && rdesc[52] == 0x25 && rdesc[53] == 0x01) {32		hid_info(hdev, "Fixing up logical maximum in report descriptor (Skycable)\n");33		rdesc[53] = 0x65;34	}35	return rdesc;36}37 38static const struct hid_device_id ortek_devices[] = {39	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },40	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },41	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_IHOME_IMAC_A210S) },42	{ HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) },43	{ }44};45MODULE_DEVICE_TABLE(hid, ortek_devices);46 47static struct hid_driver ortek_driver = {48	.name = "ortek",49	.id_table = ortek_devices,50	.report_fixup = ortek_report_fixup51};52module_hid_driver(ortek_driver);53 54MODULE_DESCRIPTION("HID driver for Ortek PKB-1700/WKB-2000/Skycable wireless keyboard and mouse trackpad");55MODULE_LICENSE("GPL");56