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

   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");
  55