/*
   *  HID driver for Saitek devices, currently only the PS1000 (USB gamepad).
   *  Fixes the HID report descriptor by removing a non-existent axis and
   *  clearing the constant bit on the input reports for buttons and d-pad.
   *  (This module is based on "hid-ortek".)
   *
   *  Copyright (c) 2012 Andreas Hübner
   */
  
  /*
   * 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/device.h>
  #include <linux/hid.h>
  #include <linux/module.h>
  #include <linux/kernel.h>
  
  #include "hid-ids.h"
  
  static __u8 *saitek_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  		unsigned int *rsize)
  {
  	if (*rsize == 137 && rdesc[20] == 0x09 && rdesc[21] == 0x33
  			&& rdesc[94] == 0x81 && rdesc[95] == 0x03
  			&& rdesc[110] == 0x81 && rdesc[111] == 0x03) {
  
  		hid_info(hdev, "Fixing up Saitek PS1000 report descriptor
  ");
  
  		/* convert spurious axis to a "noop" Logical Minimum (0) */
  		rdesc[20] = 0x15;
  		rdesc[21] = 0x00;
  
  		/* clear constant bit on buttons and d-pad */
  		rdesc[95] = 0x02;
  		rdesc[111] = 0x02;
  
  	}
  	return rdesc;
  }
  
  static const struct hid_device_id saitek_devices[] = {
  	{ HID_USB_DEVICE(USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_PS1000)},
  	{ }
  };
  
  MODULE_DEVICE_TABLE(hid, saitek_devices);
  
  static struct hid_driver saitek_driver = {
  	.name = "saitek",
  	.id_table = saitek_devices,
  	.report_fixup = saitek_report_fixup
  };
  module_hid_driver(saitek_driver);
  
  MODULE_LICENSE("GPL");