// SPDX-License-Identifier: GPL-2.0-or-later

  /*
   *  HID driver for some sunplus "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) 2008 Jiri Slaby
   */
  
  /*

   */
  
  #include <linux/device.h>
  #include <linux/hid.h>
  #include <linux/module.h>
  
  #include "hid-ids.h"

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

  {

  	if (*rsize >= 112 && rdesc[104] == 0x26 && rdesc[105] == 0x80 &&

  			rdesc[106] == 0x03) {

  		hid_info(hdev, "fixing up Sunplus Wireless Desktop report descriptor
  ");

  		rdesc[105] = rdesc[110] = 0x03;
  		rdesc[106] = rdesc[111] = 0x21;
  	}

  	return rdesc;

  }
  
  #define sp_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, max, \
  		EV_KEY, (c))
  static int sp_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 0x2003: sp_map_key_clear(KEY_ZOOMIN);		break;
  	case 0x2103: sp_map_key_clear(KEY_ZOOMOUT);	break;
  	default:
  		return 0;
  	}
  	return 1;
  }
  
  static const struct hid_device_id sp_devices[] = {
  	{ HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
  	{ }
  };
  MODULE_DEVICE_TABLE(hid, sp_devices);
  
  static struct hid_driver sp_driver = {
  	.name = "sunplus",
  	.id_table = sp_devices,
  	.report_fixup = sp_report_fixup,
  	.input_mapping = sp_input_mapping,
  };

  module_hid_driver(sp_driver);

  MODULE_LICENSE("GPL");