/*
   * FireDTV driver (formerly known as FireSAT)
   *
   * Copyright (C) 2004 Andreas Monitzer <andy@monitzer.com>
   *
   *	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/bitops.h>
  #include <linux/input.h>
  #include <linux/kernel.h>
  #include <linux/slab.h>
  #include <linux/string.h>
  #include <linux/types.h>
  #include <linux/workqueue.h>
  
  #include "firedtv.h"
  
  /* fixed table with older keycodes, geared towards MythTV */
  static const u16 oldtable[] = {
  
  	/* code from device: 0x4501...0x451f */
  
  	KEY_ESC,
  	KEY_F9,
  	KEY_1,
  	KEY_2,
  	KEY_3,
  	KEY_4,
  	KEY_5,
  	KEY_6,
  	KEY_7,
  	KEY_8,
  	KEY_9,
  	KEY_I,
  	KEY_0,
  	KEY_ENTER,
  	KEY_RED,
  	KEY_UP,
  	KEY_GREEN,
  	KEY_F10,
  	KEY_SPACE,
  	KEY_F11,
  	KEY_YELLOW,
  	KEY_DOWN,
  	KEY_BLUE,
  	KEY_Z,
  	KEY_P,
  	KEY_PAGEDOWN,
  	KEY_LEFT,
  	KEY_W,
  	KEY_RIGHT,
  	KEY_P,
  	KEY_M,
  
  	/* code from device: 0x4540...0x4542 */
  
  	KEY_R,
  	KEY_V,
  	KEY_C,
  };
  
  /* user-modifiable table for a remote as sold in 2008 */
  static const u16 keytable[] = {
  
  	/* code from device: 0x0300...0x031f */
  
  	[0x00] = KEY_POWER,
  	[0x01] = KEY_SLEEP,
  	[0x02] = KEY_STOP,
  	[0x03] = KEY_OK,
  	[0x04] = KEY_RIGHT,
  	[0x05] = KEY_1,
  	[0x06] = KEY_2,
  	[0x07] = KEY_3,
  	[0x08] = KEY_LEFT,
  	[0x09] = KEY_4,
  	[0x0a] = KEY_5,
  	[0x0b] = KEY_6,
  	[0x0c] = KEY_UP,
  	[0x0d] = KEY_7,
  	[0x0e] = KEY_8,
  	[0x0f] = KEY_9,
  	[0x10] = KEY_DOWN,
  	[0x11] = KEY_TITLE,	/* "OSD" - fixme */
  	[0x12] = KEY_0,
  	[0x13] = KEY_F20,	/* "16:9" - fixme */
  	[0x14] = KEY_SCREEN,	/* "FULL" - fixme */
  	[0x15] = KEY_MUTE,
  	[0x16] = KEY_SUBTITLE,
  	[0x17] = KEY_RECORD,
  	[0x18] = KEY_TEXT,
  	[0x19] = KEY_AUDIO,
  	[0x1a] = KEY_RED,
  	[0x1b] = KEY_PREVIOUS,
  	[0x1c] = KEY_REWIND,
  	[0x1d] = KEY_PLAYPAUSE,
  	[0x1e] = KEY_NEXT,
  	[0x1f] = KEY_VOLUMEUP,
  
  	/* code from device: 0x0340...0x0354 */
  
  	[0x20] = KEY_CHANNELUP,
  	[0x21] = KEY_F21,	/* "4:3" - fixme */
  	[0x22] = KEY_TV,
  	[0x23] = KEY_DVD,
  	[0x24] = KEY_VCR,
  	[0x25] = KEY_AUX,
  	[0x26] = KEY_GREEN,
  	[0x27] = KEY_YELLOW,
  	[0x28] = KEY_BLUE,
  	[0x29] = KEY_CHANNEL,	/* "CH.LIST" */
  	[0x2a] = KEY_VENDOR,	/* "CI" - fixme */
  	[0x2b] = KEY_VOLUMEDOWN,
  	[0x2c] = KEY_CHANNELDOWN,
  	[0x2d] = KEY_LAST,
  	[0x2e] = KEY_INFO,
  	[0x2f] = KEY_FORWARD,
  	[0x30] = KEY_LIST,
  	[0x31] = KEY_FAVORITES,
  	[0x32] = KEY_MENU,
  	[0x33] = KEY_EPG,
  	[0x34] = KEY_EXIT,
  };
  
  int fdtv_register_rc(struct firedtv *fdtv, struct device *dev)
  {
  	struct input_dev *idev;
  	int i, err;
  
  	idev = input_allocate_device();
  	if (!idev)
  		return -ENOMEM;
  
  	fdtv->remote_ctrl_dev = idev;
  	idev->name = "FireDTV remote control";
  	idev->dev.parent = dev;
  	idev->evbit[0] = BIT_MASK(EV_KEY);
  	idev->keycode = kmemdup(keytable, sizeof(keytable), GFP_KERNEL);
  	if (!idev->keycode) {
  		err = -ENOMEM;
  		goto fail;
  	}
  	idev->keycodesize = sizeof(keytable[0]);
  	idev->keycodemax = ARRAY_SIZE(keytable);
  
  	for (i = 0; i < ARRAY_SIZE(keytable); i++)
  		set_bit(keytable[i], idev->keybit);
  
  	err = input_register_device(idev);
  	if (err)
  		goto fail_free_keymap;
  
  	return 0;
  
  fail_free_keymap:
  	kfree(idev->keycode);
  fail:
  	input_free_device(idev);
  	return err;
  }
  
  void fdtv_unregister_rc(struct firedtv *fdtv)
  {
  	cancel_work_sync(&fdtv->remote_ctrl_work);
  	kfree(fdtv->remote_ctrl_dev->keycode);
  	input_unregister_device(fdtv->remote_ctrl_dev);
  }
  
  void fdtv_handle_rc(struct firedtv *fdtv, unsigned int code)
  {
  	struct input_dev *idev = fdtv->remote_ctrl_dev;
  	u16 *keycode = idev->keycode;
  
  	if (code >= 0x0300 && code <= 0x031f)
  		code = keycode[code - 0x0300];
  	else if (code >= 0x0340 && code <= 0x0354)
  		code = keycode[code - 0x0320];
  	else if (code >= 0x4501 && code <= 0x451f)
  		code = oldtable[code - 0x4501];
  	else if (code >= 0x4540 && code <= 0x4542)
  		code = oldtable[code - 0x4521];
  	else {
  		printk(KERN_DEBUG "firedtv: invalid key code 0x%04x "
  		       "from remote control
  ", code);
  		return;
  	}
  
  	input_report_key(idev, code, 1);
  	input_sync(idev);
  	input_report_key(idev, code, 0);
  	input_sync(idev);
  }