/* * HID driver for Holtek gaming mice * Copyright (c) 2013 Christian Ohm * Heavily inspired by various other HID drivers that adjust the report * descriptor. */ /* * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. */ #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 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, }; module_hid_driver(holtek_mouse_driver); MODULE_LICENSE("GPL");