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