// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* HID driver for Holtek gaming mice
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* Copyright (c) 2013 Christian Ohm
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* Heavily inspired by various other HID drivers that adjust the report
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* descriptor.
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*/
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/*
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*/
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#include <linux/hid.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#include "hid-ids.h"
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/*
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* The report descriptor of some Holtek based gaming mice specifies an
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* excessively large number of consumer usages (2^15), which is more than
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* HID_MAX_USAGES. This prevents proper parsing of the report descriptor.
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*
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* This driver fixes the report descriptor for:
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* - USB ID 04d9:a067, sold as Sharkoon Drakonia and Perixx MX-2000
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* - USB ID 04d9:a04a, sold as Tracer Sniper TRM-503, NOVA Gaming Slider X200
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* and Zalman ZM-GM1
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* - USB ID 04d9:a081, sold as SHARKOON DarkGlider Gaming mouse
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* - USB ID 04d9:a072, sold as LEETGION Hellion Gaming Mouse
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* - USB ID 04d9:a0c2, sold as ETEKCITY Scroll T-140 Gaming Mouse
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*/
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static __u8 *holtek_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
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unsigned int *rsize)
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{
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struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
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if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
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/* Change usage maximum and logical maximum from 0x7fff to
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* 0x2fff, so they don't exceed HID_MAX_USAGES */
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switch (hdev->product) {
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case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067:
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case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072:
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case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2:
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if (*rsize >= 122 && rdesc[115] == 0xff && rdesc[116] == 0x7f
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&& rdesc[120] == 0xff && rdesc[121] == 0x7f) {
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hid_info(hdev, "Fixing up report descriptor\n");
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rdesc[116] = rdesc[121] = 0x2f;
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}
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break;
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case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A:
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case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070:
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case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081:
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if (*rsize >= 113 && rdesc[106] == 0xff && rdesc[107] == 0x7f
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&& rdesc[111] == 0xff && rdesc[112] == 0x7f) {
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hid_info(hdev, "Fixing up report descriptor\n");
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rdesc[107] = rdesc[112] = 0x2f;
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}
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break;
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}
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}
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return rdesc;
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}
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static int holtek_mouse_probe(struct hid_device *hdev,
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const struct hid_device_id *id)
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{
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int ret;
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if (!hid_is_usb(hdev))
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return -EINVAL;
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ret = hid_parse(hdev);
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if (ret) {
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hid_err(hdev, "hid parse failed: %d\n", ret);
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return ret;
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}
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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if (ret) {
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hid_err(hdev, "hw start failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static const struct hid_device_id holtek_mouse_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
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USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
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USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
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USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
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USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
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USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
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USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, holtek_mouse_devices);
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static struct hid_driver holtek_mouse_driver = {
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.name = "holtek_mouse",
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.id_table = holtek_mouse_devices,
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.report_fixup = holtek_mouse_report_fixup,
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.probe = holtek_mouse_probe,
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};
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module_hid_driver(holtek_mouse_driver);
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MODULE_LICENSE("GPL");
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