| // 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) |
| { |
| struct usb_interface *intf = to_usb_interface(hdev->dev.parent); |
| |
| if (intf->cur_altsetting->desc.bInterfaceNumber == 1) { |
| /* Change usage maximum and logical maximum from 0x7fff to |
| * 0x2fff, so they don't exceed HID_MAX_USAGES */ |
| switch (hdev->product) { |
| case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067: |
| case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072: |
| case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2: |
| if (*rsize >= 122 && rdesc[115] == 0xff && rdesc[116] == 0x7f |
| && rdesc[120] == 0xff && rdesc[121] == 0x7f) { |
| hid_info(hdev, "Fixing up report descriptor\n"); |
| rdesc[116] = rdesc[121] = 0x2f; |
| } |
| break; |
| case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A: |
| case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070: |
| case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081: |
| if (*rsize >= 113 && rdesc[106] == 0xff && rdesc[107] == 0x7f |
| && rdesc[111] == 0xff && rdesc[112] == 0x7f) { |
| hid_info(hdev, "Fixing up report descriptor\n"); |
| rdesc[107] = rdesc[112] = 0x2f; |
| } |
| break; |
| } |
| |
| } |
| return rdesc; |
| } |
| |
| static int holtek_mouse_probe(struct hid_device *hdev, |
| const struct hid_device_id *id) |
| { |
| if (!hid_is_usb(hdev)) |
| return -EINVAL; |
| return 0; |
| } |
| |
| static const struct hid_device_id holtek_mouse_devices[] = { |
| { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, |
| USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) }, |
| { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, |
| USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070) }, |
| { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, |
| USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) }, |
| { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, |
| USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072) }, |
| { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, |
| USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081) }, |
| { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, |
| USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2) }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(hid, holtek_mouse_devices); |
| |
| static struct hid_driver holtek_mouse_driver = { |
| .name = "holtek_mouse", |
| .id_table = holtek_mouse_devices, |
| .report_fixup = holtek_mouse_report_fixup, |
| .probe = holtek_mouse_probe, |
| }; |
| |
| module_hid_driver(holtek_mouse_driver); |
| MODULE_LICENSE("GPL"); |