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Linux/drivers/hid/hid-holtek-mouse.c

  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  * - USB ID 04d9:a0c2, sold as ETEKCITY Scroll T-140 Gaming Mouse
 33  */
 34 
 35 static __u8 *holtek_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 36                 unsigned int *rsize)
 37 {
 38         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 39 
 40         if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
 41                 /* Change usage maximum and logical maximum from 0x7fff to
 42                  * 0x2fff, so they don't exceed HID_MAX_USAGES */
 43                 switch (hdev->product) {
 44                 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067:
 45                 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072:
 46                 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2:
 47                         if (*rsize >= 122 && rdesc[115] == 0xff && rdesc[116] == 0x7f
 48                                         && rdesc[120] == 0xff && rdesc[121] == 0x7f) {
 49                                 hid_info(hdev, "Fixing up report descriptor\n");
 50                                 rdesc[116] = rdesc[121] = 0x2f;
 51                         }
 52                         break;
 53                 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A:
 54                 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070:
 55                 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081:
 56                         if (*rsize >= 113 && rdesc[106] == 0xff && rdesc[107] == 0x7f
 57                                         && rdesc[111] == 0xff && rdesc[112] == 0x7f) {
 58                                 hid_info(hdev, "Fixing up report descriptor\n");
 59                                 rdesc[107] = rdesc[112] = 0x2f;
 60                         }
 61                         break;
 62                 }
 63 
 64         }
 65         return rdesc;
 66 }
 67 
 68 static const struct hid_device_id holtek_mouse_devices[] = {
 69         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
 70                         USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) },
 71         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
 72                         USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070) },
 73         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
 74                         USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) },
 75         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
 76                         USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072) },
 77         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
 78                         USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081) },
 79         { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
 80                         USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2) },
 81         { }
 82 };
 83 MODULE_DEVICE_TABLE(hid, holtek_mouse_devices);
 84 
 85 static struct hid_driver holtek_mouse_driver = {
 86         .name = "holtek_mouse",
 87         .id_table = holtek_mouse_devices,
 88         .report_fixup = holtek_mouse_report_fixup,
 89 };
 90 
 91 module_hid_driver(holtek_mouse_driver);
 92 MODULE_LICENSE("GPL");
 93 

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