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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * HID driver for Holtek gaming mice4 * Copyright (c) 2013 Christian Ohm5 * Heavily inspired by various other HID drivers that adjust the report6 * 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 an20 * excessively large number of consumer usages (2^15), which is more than21 * 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-200025 * - USB ID 04d9:a04a, sold as Tracer Sniper TRM-503, NOVA Gaming Slider X20026 * and Zalman ZM-GM127 * - USB ID 04d9:a081, sold as SHARKOON DarkGlider Gaming mouse28 * - USB ID 04d9:a072, sold as LEETGION Hellion Gaming Mouse29 * - USB ID 04d9:a0c2, sold as ETEKCITY Scroll T-140 Gaming Mouse30 */31 32static const __u8 *holtek_mouse_report_fixup(struct hid_device *hdev,33 __u8 *rdesc, 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 to39 * 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] == 0x7f45 && 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] == 0x7f54 && 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 int holtek_mouse_probe(struct hid_device *hdev,66 const struct hid_device_id *id)67{68 int ret;69 70 if (!hid_is_usb(hdev))71 return -EINVAL;72 73 ret = hid_parse(hdev);74 if (ret) {75 hid_err(hdev, "hid parse failed: %d\n", ret);76 return ret;77 }78 79 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);80 if (ret) {81 hid_err(hdev, "hw start failed: %d\n", ret);82 return ret;83 }84 85 return 0;86}87 88static const struct hid_device_id holtek_mouse_devices[] = {89 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,90 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) },91 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,92 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070) },93 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,94 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) },95 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,96 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072) },97 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,98 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081) },99 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,100 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2) },101 { }102};103MODULE_DEVICE_TABLE(hid, holtek_mouse_devices);104 105static struct hid_driver holtek_mouse_driver = {106 .name = "holtek_mouse",107 .id_table = holtek_mouse_devices,108 .report_fixup = holtek_mouse_report_fixup,109 .probe = holtek_mouse_probe,110};111 112module_hid_driver(holtek_mouse_driver);113MODULE_DESCRIPTION("HID driver for Holtek gaming mice");114MODULE_LICENSE("GPL");115