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

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * HID driver for Holtek gaming mice
   4 * Copyright (c) 2013 Christian Ohm
   5 * Heavily inspired by various other HID drivers that adjust the report
   6 * descriptor.
   7*/
   8
   9/*
  10 */
  11
  12#include <linux/hid.h>
  13#include <linux/module.h>
  14#include <linux/usb.h>
  15
  16#include "hid-ids.h"
  17
  18/*
  19 * The report descriptor of some Holtek based gaming mice specifies an
  20 * excessively large number of consumer usages (2^15), which is more than
  21 * HID_MAX_USAGES. This prevents proper parsing of the report descriptor.
  22 *
  23 * This driver fixes the report descriptor for:
  24 * - USB ID 04d9:a067, sold as Sharkoon Drakonia and Perixx MX-2000
  25 * - USB ID 04d9:a04a, sold as Tracer Sniper TRM-503, NOVA Gaming Slider X200
  26 *   and Zalman ZM-GM1
  27 * - USB ID 04d9:a081, sold as SHARKOON DarkGlider Gaming mouse
  28 * - USB ID 04d9:a072, sold as LEETGION Hellion Gaming Mouse
  29 * - USB ID 04d9:a0c2, sold as ETEKCITY Scroll T-140 Gaming Mouse
  30 */
  31
  32static __u8 *holtek_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  33                unsigned int *rsize)
  34{
  35        struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
  36
  37        if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
  38                /* Change usage maximum and logical maximum from 0x7fff to
  39                 * 0x2fff, so they don't exceed HID_MAX_USAGES */
  40                switch (hdev->product) {
  41                case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067:
  42                case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072:
  43                case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2:
  44                        if (*rsize >= 122 && rdesc[115] == 0xff && rdesc[116] == 0x7f
  45                                        && rdesc[120] == 0xff && rdesc[121] == 0x7f) {
  46                                hid_info(hdev, "Fixing up report descriptor\n");
  47                                rdesc[116] = rdesc[121] = 0x2f;
  48                        }
  49                        break;
  50                case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A:
  51                case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070:
  52                case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081:
  53                        if (*rsize >= 113 && rdesc[106] == 0xff && rdesc[107] == 0x7f
  54                                        && rdesc[111] == 0xff && rdesc[112] == 0x7f) {
  55                                hid_info(hdev, "Fixing up report descriptor\n");
  56                                rdesc[107] = rdesc[112] = 0x2f;
  57                        }
  58                        break;
  59                }
  60
  61        }
  62        return rdesc;
  63}
  64
  65static const struct hid_device_id holtek_mouse_devices[] = {
  66        { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
  67                        USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) },
  68        { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
  69                        USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070) },
  70        { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
  71                        USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) },
  72        { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
  73                        USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072) },
  74        { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
  75                        USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081) },
  76        { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
  77                        USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2) },
  78        { }
  79};
  80MODULE_DEVICE_TABLE(hid, holtek_mouse_devices);
  81
  82static struct hid_driver holtek_mouse_driver = {
  83        .name = "holtek_mouse",
  84        .id_table = holtek_mouse_devices,
  85        .report_fixup = holtek_mouse_report_fixup,
  86};
  87
  88module_hid_driver(holtek_mouse_driver);
  89MODULE_LICENSE("GPL");
  90