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kernel/linux-imx6_3.14.28/drivers/hid/hid-ortek.c 1.71 KB
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  /*
   *  HID driver for various devices which are apparently based on the same chipset
   *  from certain vendor which produces chips that contain wrong LogicalMaximum
   *  value in their HID report descriptor. Currently supported devices are:
   *
   *    Ortek PKB-1700
   *    Ortek WKB-2000
   *    Skycable wireless presenter
   *
   *  Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
   *  Copyright (c) 2011 Jiri Kosina
   */
  
  /*
   * 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 "hid-ids.h"
  
  static __u8 *ortek_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  		unsigned int *rsize)
  {
  	if (*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x01) {
  		hid_info(hdev, "Fixing up logical minimum in report descriptor (Ortek)
  ");
  		rdesc[55] = 0x92;
  	} else if (*rsize >= 54 && rdesc[52] == 0x25 && rdesc[53] == 0x01) {
  		hid_info(hdev, "Fixing up logical minimum in report descriptor (Skycable)
  ");
  		rdesc[53] = 0x65;
  	}
  	return rdesc;
  }
  
  static const struct hid_device_id ortek_devices[] = {
  	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
  	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
  	{ HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) },
  	{ }
  };
  MODULE_DEVICE_TABLE(hid, ortek_devices);
  
  static struct hid_driver ortek_driver = {
  	.name = "ortek",
  	.id_table = ortek_devices,
  	.report_fixup = ortek_report_fixup
  };
  module_hid_driver(ortek_driver);
  
  MODULE_LICENSE("GPL");