/*
   * HID driver for TwinHan IR remote control
   *
   * Based on hid-gyration.c
   *
   * Copyright (c) 2009 Bruno Prémont <bonbons@linux-vserver.org>
   */
  
  /*
   * 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.
   */
  
  #include <linux/device.h>
  #include <linux/input.h>
  #include <linux/hid.h>
  #include <linux/module.h>
  
  #include "hid-ids.h"
  
  /*	Remote control key layout + listing:
   *
   * 	Full Screen                              Power
   *	KEY_SCREEN                          KEY_POWER2
   *
   *	1                     2                      3
   *	KEY_NUMERIC_1   KEY_NUMERIC_2    KEY_NUMERIC_3
   *
   *	4                     5                      6
   *	KEY_NUMERIC_4   KEY_NUMERIC_5    KEY_NUMERIC_6
   *
   *	7                     8                      9
   *	KEY_NUMERIC_7   KEY_NUMERIC_8    KEY_NUMERIC_9
   *
   *	REC                   0               Favorite
   *	KEY_RECORD      KEY_NUMERIC_0    KEY_FAVORITES
   *
   *	Rewind                                 Forward
   *	KEY_REWIND           CH+           KEY_FORWARD
   *	               KEY_CHANNELUP
   *
   *	VOL-                  >                   VOL+
   *	KEY_VOLUMEDOWN    KEY_PLAY        KEY_VOLUMEUP
   *
   *	                     CH-
   *	              KEY_CHANNELDOWN
   *	Recall                                    Stop
   *	KEY_RESTART                           KEY_STOP
   *
   *	Timeshift/Pause     Mute                Cancel
   *	KEY_PAUSE         KEY_MUTE          KEY_CANCEL
   *
   *	Capture            Preview                 EPG
   *	KEY_PRINT        KEY_PROGRAM           KEY_EPG
   *
   *	Record List          Tab              Teletext
   *	KEY_LIST            KEY_TAB           KEY_TEXT
   */
  
  #define th_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, max, \
  					EV_KEY, (c))
  static int twinhan_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_KEYBOARD)
  		return 0;
  
  	switch (usage->hid & HID_USAGE) {
  	/* Map all keys from Twinhan Remote */
  	case 0x004: th_map_key_clear(KEY_TEXT);         break;
  	case 0x006: th_map_key_clear(KEY_RESTART);      break;
  	case 0x008: th_map_key_clear(KEY_EPG);          break;
  	case 0x00c: th_map_key_clear(KEY_REWIND);       break;
  	case 0x00e: th_map_key_clear(KEY_PROGRAM);      break;
  	case 0x00f: th_map_key_clear(KEY_LIST);         break;
  	case 0x010: th_map_key_clear(KEY_MUTE);         break;
  	case 0x011: th_map_key_clear(KEY_FORWARD);      break;
  	case 0x013: th_map_key_clear(KEY_PRINT);        break;
  	case 0x017: th_map_key_clear(KEY_PAUSE);        break;
  	case 0x019: th_map_key_clear(KEY_FAVORITES);    break;
  	case 0x01d: th_map_key_clear(KEY_SCREEN);       break;
  	case 0x01e: th_map_key_clear(KEY_NUMERIC_1);    break;
  	case 0x01f: th_map_key_clear(KEY_NUMERIC_2);    break;
  	case 0x020: th_map_key_clear(KEY_NUMERIC_3);    break;
  	case 0x021: th_map_key_clear(KEY_NUMERIC_4);    break;
  	case 0x022: th_map_key_clear(KEY_NUMERIC_5);    break;
  	case 0x023: th_map_key_clear(KEY_NUMERIC_6);    break;
  	case 0x024: th_map_key_clear(KEY_NUMERIC_7);    break;
  	case 0x025: th_map_key_clear(KEY_NUMERIC_8);    break;
  	case 0x026: th_map_key_clear(KEY_NUMERIC_9);    break;
  	case 0x027: th_map_key_clear(KEY_NUMERIC_0);    break;
  	case 0x028: th_map_key_clear(KEY_PLAY);         break;
  	case 0x029: th_map_key_clear(KEY_CANCEL);       break;
  	case 0x02b: th_map_key_clear(KEY_TAB);          break;
  	/* Power       = 0x0e0 + 0x0e1 + 0x0e2 + 0x03f */
  	case 0x03f: th_map_key_clear(KEY_POWER2);       break;
  	case 0x04a: th_map_key_clear(KEY_RECORD);       break;
  	case 0x04b: th_map_key_clear(KEY_CHANNELUP);    break;
  	case 0x04d: th_map_key_clear(KEY_STOP);         break;
  	case 0x04e: th_map_key_clear(KEY_CHANNELDOWN);  break;
  	/* Volume down = 0x0e1 + 0x051                 */
  	case 0x051: th_map_key_clear(KEY_VOLUMEDOWN);   break;
  	/* Volume up   = 0x0e1 + 0x052                 */
  	case 0x052: th_map_key_clear(KEY_VOLUMEUP);     break;
  	/* Kill the extra keys used for multi-key "power" and "volume" keys
  	 * as well as continuously to release CTRL,ALT,META,... keys */
  	case 0x0e0:
  	case 0x0e1:
  	case 0x0e2:
  	case 0x0e3:
  	case 0x0e4:
  	case 0x0e5:
  	case 0x0e6:
  	case 0x0e7:
  	default:
  		return -1;
  	}
  	return 1;
  }
  
  static const struct hid_device_id twinhan_devices[] = {
  	{ HID_USB_DEVICE(USB_VENDOR_ID_TWINHAN, USB_DEVICE_ID_TWINHAN_IR_REMOTE) },
  	{ }
  };
  MODULE_DEVICE_TABLE(hid, twinhan_devices);
  
  static struct hid_driver twinhan_driver = {
  	.name = "twinhan",
  	.id_table = twinhan_devices,
  	.input_mapping = twinhan_input_mapping,
  };
  module_hid_driver(twinhan_driver);
  
  MODULE_LICENSE("GPL");