cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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hid-ortek.c (1642B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 *  HID driver for various devices which are apparently based on the same chipset
      4 *  from certain vendor which produces chips that contain wrong LogicalMaximum
      5 *  value in their HID report descriptor. Currently supported devices are:
      6 *
      7 *    Ortek PKB-1700
      8 *    Ortek WKB-2000
      9 *    iHome IMAC-A210S
     10 *    Skycable wireless presenter
     11 *
     12 *  Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
     13 *  Copyright (c) 2011 Jiri Kosina
     14 */
     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 __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_fixup
     51};
     52module_hid_driver(ortek_driver);
     53
     54MODULE_LICENSE("GPL");