/**

 * $Id$

 *

 * 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, uint32_t pressure, 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;

    }

}