/*
   *  HID driver for some cherry "special" devices
   *
   *  Copyright (c) 1999 Andreas Gal
   *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
   *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
   *  Copyright (c) 2006-2007 Jiri Kosina
   *  Copyright (c) 2007 Paul Walmsley
   *  Copyright (c) 2008 Jiri Slaby
   */
  
  /*
   * 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"
  
  /*
   * Cherry Cymotion keyboard have an invalid HID report descriptor,
   * that needs fixing before we can parse it.
   */

  static __u8 *ch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  		unsigned int *rsize)

  {

  	if (*rsize >= 17 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {

  		hid_info(hdev, "fixing up Cherry Cymotion report descriptor
  ");

  		rdesc[11] = rdesc[16] = 0xff;
  		rdesc[12] = rdesc[17] = 0x03;
  	}

  	return rdesc;

  }
  
  #define ch_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, max, \
  					EV_KEY, (c))
  static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
  		struct hid_field *field, struct hid_usage *usage,
  		unsigned long **bit, int *max)
  {
  	if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
  		return 0;
  
  	switch (usage->hid & HID_USAGE) {
  	case 0x301: ch_map_key_clear(KEY_PROG1);	break;
  	case 0x302: ch_map_key_clear(KEY_PROG2);	break;
  	case 0x303: ch_map_key_clear(KEY_PROG3);	break;
  	default:
  		return 0;
  	}
  
  	return 1;
  }
  
  static const struct hid_device_id ch_devices[] = {
  	{ HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },

  	{ HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) },

  	{ }
  };
  MODULE_DEVICE_TABLE(hid, ch_devices);
  
  static struct hid_driver ch_driver = {
  	.name = "cherry",
  	.id_table = ch_devices,
  	.report_fixup = ch_report_fixup,
  	.input_mapping = ch_input_mapping,
  };

  static int __init ch_init(void)

  {
  	return hid_register_driver(&ch_driver);
  }

  static void __exit ch_exit(void)

  {
  	hid_unregister_driver(&ch_driver);
  }
  
  module_init(ch_init);
  module_exit(ch_exit);
  MODULE_LICENSE("GPL");