/**

  * $Id: kbd.c 602 2008-01-15 20:50:23Z nkeynes $

  *

  * Implements the standard dreamcast keyboard

  *

  * Copyright (c) 2005 Nathan Keynes.

  *

  * 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.

  *

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  */

 #include <stdlib.h>

 #include <X11/keysym.h>

 #include "dream.h"

 #include "dreamcast.h"

 #include "display.h"

 #include "maple.h"

 #define KEYBOARD_IDENT {  0x00, 0x00, 0x00, 0x40,  0x02, 0x05, 0x00, 0x80,  0x00, 0x00, 0x00, 0x00, \

  0x00, 0x00, 0x00, 0x00,  0x01, 0x00, 0x4b, 0x65,  0x79, 0x62, 0x6f, 0x61,  0x72, 0x64, 0x20, 0x20, \

  0x20, 0x20, 0x20, 0x20,  0x20, 0x20, 0x20, 0x20,  0x20, 0x20, 0x20, 0x20,  0x20, 0x20, 0x20, 0x20, \

  0x20, 0x20, 0x20, 0x20,  0x50, 0x72, 0x6f, 0x64,  0x75, 0x63, 0x65, 0x64,  0x20, 0x42, 0x79, 0x20, \

  0x6f, 0x72, 0x20, 0x55,  0x6e, 0x64, 0x65, 0x72,  0x20, 0x4c, 0x69, 0x63,  0x65, 0x6e, 0x73, 0x65, \

  0x20, 0x46, 0x72, 0x6f,  0x6d, 0x20, 0x53, 0x45,  0x47, 0x41, 0x20, 0x45,  0x4e, 0x54, 0x45, 0x52, \

  0x50, 0x52, 0x49, 0x53,  0x45, 0x53, 0x2c, 0x4c,  0x54, 0x44, 0x2e, 0x20,  0x20, 0x20, 0x20, 0x20, \

  0x2c, 0x01, 0x90, 0x01 }

 #define KEYBOARD_VERSION {0x56, 0x65, 0x72, 0x73,  0x69, 0x6f, 0x6e, 0x20,  0x31, 0x2e, 0x30, 0x31, \

  0x30, 0x2c, 0x31, 0x39,  0x39, 0x39, 0x2f, 0x30,  0x34, 0x2f, 0x32, 0x37,  0x2c, 0x33, 0x31, 0x35, \

  0x2d, 0x36, 0x32, 0x31,  0x31, 0x2d, 0x41, 0x4d,  0x20, 0x20, 0x20, 0x2c,  0x4b, 0x65, 0x79, 0x20, \

  0x53, 0x63, 0x61, 0x6e,  0x20, 0x4d, 0x6f, 0x64,  0x75, 0x6c, 0x65, 0x20,  0x3a, 0x20, 0x54, 0x68, \

  0x65, 0x20, 0x32, 0x6e,  0x64, 0x20, 0x45, 0x64,  0x69, 0x74, 0x69, 0x6f,  0x6e, 0x2e, 0x20, 0x30, \

  0x34, 0x2f, 0x32, 0x35 }

 void keyboard_attach( maple_device_t dev );

 void keyboard_detach( maple_device_t dev );

 maple_device_t keyboard_clone( maple_device_t dev );

 maple_device_t keyboard_new();

 int keyboard_get_cond( maple_device_t dev, int function, unsigned char *outbuf,

                          unsigned int *outlen );

 typedef struct keyboard_device {

     struct maple_device dev;

     uint8_t condition[8];

 } *keyboard_device_t; 

 struct maple_device_class keyboard_class = { "Sega Keyboard", keyboard_new };

 static struct keyboard_device base_keyboard = {

     { MAPLE_DEVICE_TAG, &keyboard_class, KEYBOARD_IDENT, KEYBOARD_VERSION, 

       NULL, keyboard_attach, keyboard_detach, maple_default_destroy,

       keyboard_clone, NULL, NULL, keyboard_get_cond, NULL, NULL, NULL },

     {0,0,0,0,0,0,0,0}, 

 };

 #define KEYBOARD(x) ((keyboard_device_t)(x))

 maple_device_t keyboard_new( )

 {

     keyboard_device_t dev = malloc( sizeof(struct keyboard_device) );

     memcpy( dev, &base_keyboard, sizeof(base_keyboard) );

     return MAPLE_DEVICE(dev);

 }

 maple_device_t keyboard_clone( maple_device_t srcdevice )

 {

     keyboard_device_t src = (keyboard_device_t)srcdevice;

     keyboard_device_t dev = (keyboard_device_t)keyboard_new();

     memcpy( dev->condition, src->condition, sizeof(src->condition) );

     return MAPLE_DEVICE(dev);

 }

 void keyboard_key_down( keyboard_device_t dev, uint8_t key )

 {

     int i;

     for( i=2; i<8; i++ ) {

 	if( dev->condition[i] == key ) {

 	    return; // key already down, missed event or repeat

 	} else if( dev->condition[i] == 0 ) {

 	    dev->condition[i] = key;

 	    return;

 	}

     }

     /* Key array is full - skip for the moment */

 }

 void keyboard_key_up( keyboard_device_t dev, uint8_t key )

 {

     int i;

     for( i=2; i<8; i++ ) {

 	if( dev->condition[i] == key ) {

 	    for( ; i<7; i++ ) {

 		dev->condition[i] = dev->condition[i+1];

 	    }

 	    dev->condition[7] = 0;

 	    break;

 	}

     }

 }

 void keyboard_input_hook( void *mdev, uint32_t keycode, gboolean isKeyDown )

 {

     keyboard_device_t dev = (keyboard_device_t)mdev;

     uint16_t key = input_keycode_to_dckeysym( keycode );

     if( key != 0 ) {

 	if( key >> 8 == 0xFF ) { // shift 

 	    if( isKeyDown ) {

 		dev->condition[0] |= (key&0xFF);

 	    } else {

 		dev->condition[0] &= ~(key&0xFF);

 	    }

 	} else {

 	    if( isKeyDown ) {

 		keyboard_key_down( dev, (uint8_t)key );

 	    } else {

 		keyboard_key_up( dev, (uint8_t)key );

 	    }

 	}

     }

     /*

     fprintf( stderr, "Key cond: %02X %02X  %02X %02X %02X %02X %02X %02X\n",

 	     dev->condition[0], dev->condition[1], dev->condition[2],

 	     dev->condition[3], dev->condition[4], dev->condition[5],

 	     dev->condition[6], dev->condition[7] );

     */     

 }

 /**

  * Device is being attached to the bus. Go through the config and reserve the

  * keys we need.

  */

 void keyboard_attach( maple_device_t mdev )

 {

     input_register_hook( keyboard_input_hook, mdev );

 }

 void keyboard_detach( maple_device_t mdev )

 {

     input_unregister_hook( keyboard_input_hook, mdev );

 }

 int keyboard_get_cond( maple_device_t mdev, int function, unsigned char *outbuf,

 		       unsigned int *outlen )

 {

     keyboard_device_t dev = (keyboard_device_t)mdev;

     if( function == MAPLE_FUNC_KEYBOARD ) {

         *outlen = 2;

         memcpy( outbuf, dev->condition, 8 );

         return 0;

     } else {

         return MAPLE_ERR_FUNC_UNSUP;

     }

 }