/**

 * $Id$

 *

 * Implements the standard dreamcast controller

 *

 * 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 <assert.h>

#include "dream.h"

#include "dreamcast.h"

#include "display.h"

#include "maple.h"

/* First word of controller condition */

#define BUTTON_C            0x00000001 /* not on standard controller */

#define BUTTON_B            0x00000002

#define BUTTON_A            0x00000004

#define BUTTON_START        0x00000008

#define BUTTON_DPAD_UP      0x00000010

#define BUTTON_DPAD_DOWN    0x00000020

#define BUTTON_DPAD_LEFT    0x00000040

#define BUTTON_DPAD_RIGHT   0x00000080

#define BUTTON_Z            0x00000100 /* not on standard controller */

#define BUTTON_Y            0x00000200

#define BUTTON_X            0x00000400

#define BUTTON_D            0x00000800 /* not on standard controller */

#define BUTTON_LEFT_TRIGGER 0xFF000000 /* Bitmask */

#define BUTTON_RIGHT_TRIGGER 0x00FF0000 /* Bitmask */

/* Second word of controller condition (bitmasks) */

#define JOY_X_AXIS          0x000000FF

#define JOY_Y_AXIS          0x0000FF00

#define JOY_X_AXIS_CENTER   0x00000080

#define JOY_Y_AXIS_CENTER   0x00008000

#define JOY2_X_AXIS         0x00FF0000 /* not on standard controller */

#define JOY2_Y_AXIS         0xFF000000 /* not on standard controller */

/* The following bits are used by the emulator for flags but don't actually

 * appear in the hardware

 */

#define JOY_LEFT            0x80000001

#define JOY_RIGHT           0x80000002

#define JOY_UP              0x80000004

#define JOY_DOWN            0x80000008

/* Standard controller ID */

#define CONTROLLER_IDENT {0x00, 0x00, 0x00, 0x01,  0x00, 0x0f, 0x06, 0xfe,  0x00, 0x00, 0x00, 0x00, \

    0x00, 0x00, 0x00, 0x00,  0xff, 0x00, 0x44, 0x72,  0x65, 0x61, 0x6d, 0x63,  0x61, 0x73, 0x74, 0x20,  \

    0x43, 0x6f, 0x6e, 0x74,  0x72, 0x6f, 0x6c, 0x6c,  0x65, 0x72, 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, \

    0xae, 0x01, 0xf4, 0x01}

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

    0x30, 0x2c, 0x31, 0x39,  0x39, 0x38, 0x2f, 0x30,  0x39, 0x2f, 0x32, 0x38,  0x2c, 0x33, 0x31, 0x35, \

    0x2d, 0x36, 0x32, 0x31,  0x31, 0x2d, 0x41, 0x42,  0x20, 0x20, 0x20, 0x2c,  0x41, 0x6e, 0x61, 0x6c, \

    0x6f, 0x67, 0x20, 0x4d,  0x6f, 0x64, 0x75, 0x6c,  0x65, 0x20, 0x3a, 0x20,  0x54, 0x68, 0x65, 0x20, \

    0x34, 0x74, 0x68, 0x20,  0x45, 0x64, 0x69, 0x74,  0x69, 0x6f, 0x6e, 0x2e,  0x35, 0x2f, 0x38, 0x20, \

    0x20, 0x2b, 0x44, 0x46 }

#define CONTROLLER_CONFIG_ENTRIES 15

static void controller_attach( maple_device_t dev );

static void controller_detach( maple_device_t dev );

static void controller_destroy( maple_device_t dev );

static maple_device_t controller_clone( maple_device_t dev );

static maple_device_t controller_new();

static lxdream_config_entry_t controller_get_config( maple_device_t dev );

static void controller_set_config_value( maple_device_t dev, unsigned int key, const gchar *value );

static int controller_get_cond( maple_device_t dev, int function, unsigned char *outbuf,

                         unsigned int *outlen );

typedef struct controller_device {

    struct maple_device dev;

    uint32_t condition[2];

    struct lxdream_config_entry config[CONTROLLER_CONFIG_ENTRIES+1];

} *controller_device_t;

struct maple_device_class controller_class = { "Sega Controller", controller_new };

static struct controller_device base_controller = {

        { MAPLE_DEVICE_TAG, &controller_class, MAPLE_GRAB_DONTCARE,

          CONTROLLER_IDENT, CONTROLLER_VERSION, 

          controller_get_config, controller_set_config_value, 

          controller_attach, controller_detach, controller_destroy,

          controller_clone, NULL, NULL, controller_get_cond, NULL, NULL, NULL },

          {0x0000FFFF, 0x80808080}, 

          {{ "dpad left", N_("Dpad left"), CONFIG_TYPE_KEY },

           { "dpad right", N_("Dpad right"), CONFIG_TYPE_KEY },

           { "dpad up", N_("Dpad up"), CONFIG_TYPE_KEY },

           { "dpad down", N_("Dpad down"), CONFIG_TYPE_KEY },

           { "analog left", N_("Analog left"), CONFIG_TYPE_KEY },

           { "analog right", N_("Analog right"), CONFIG_TYPE_KEY },

           { "analog up", N_("Analog up"), CONFIG_TYPE_KEY },

           { "analog down", N_("Analog down"), CONFIG_TYPE_KEY },

           { "button X", N_("Button X"), CONFIG_TYPE_KEY },

           { "button Y", N_("Button Y"), CONFIG_TYPE_KEY },

           { "button A", N_("Button A"), CONFIG_TYPE_KEY },

           { "button B", N_("Button B"), CONFIG_TYPE_KEY },

           { "trigger left", N_("Trigger left"), CONFIG_TYPE_KEY },

           { "trigger right", N_("Trigger right"), CONFIG_TYPE_KEY },

           { "start", N_("Start button"), CONFIG_TYPE_KEY },

           { NULL, CONFIG_TYPE_NONE }} };

static int config_button_map[] = { 

        BUTTON_DPAD_LEFT, BUTTON_DPAD_RIGHT, BUTTON_DPAD_UP, BUTTON_DPAD_DOWN,

        JOY_LEFT, JOY_RIGHT, JOY_UP, JOY_DOWN, BUTTON_X, BUTTON_Y, BUTTON_A, 

        BUTTON_B, BUTTON_LEFT_TRIGGER, BUTTON_RIGHT_TRIGGER, BUTTON_START };

#define CONTROLLER(x) ((controller_device_t)(x))

static maple_device_t controller_new( )

{

    controller_device_t dev = malloc( sizeof(struct controller_device) );

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

    return MAPLE_DEVICE(dev);

}

static maple_device_t controller_clone( maple_device_t srcdevice )

{

    controller_device_t src = (controller_device_t)srcdevice;

    controller_device_t dev = (controller_device_t)controller_new();

    lxdream_copy_config_list( dev->config, src->config );

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

    return MAPLE_DEVICE(dev);

}

/**

 * Input callback 

 */

static void controller_key_callback( void *mdev, uint32_t value, uint32_t pressure, gboolean isKeyDown )

{

    controller_device_t dev = (controller_device_t)mdev;

    if( isKeyDown ) {

        switch( value ) {

        case JOY_LEFT:

            dev->condition[1] &= ~JOY_X_AXIS;

            break;

        case JOY_RIGHT:

            dev->condition[1] |= JOY_X_AXIS;

            break;

        case JOY_UP:

            dev->condition[1] &= ~JOY_Y_AXIS;

            break;

        case JOY_DOWN:

            dev->condition[1] |= JOY_Y_AXIS;

            break;

        case BUTTON_LEFT_TRIGGER:

        case BUTTON_RIGHT_TRIGGER:

            dev->condition[0] |= value;

            break;

        default:

            dev->condition[0] &= ~value;

        }

    } else {

        switch(value ) {

        case JOY_LEFT:

        case JOY_RIGHT:

            dev->condition[1] = (dev->condition[1] & ~JOY_X_AXIS)| JOY_X_AXIS_CENTER;

            break;

        case JOY_UP:

        case JOY_DOWN:

            dev->condition[1] = (dev->condition[1] & ~JOY_Y_AXIS)| JOY_Y_AXIS_CENTER;

            break;

        case BUTTON_LEFT_TRIGGER:

        case BUTTON_RIGHT_TRIGGER:

            dev->condition[0] &= ~value;

            break;

        default:

            dev->condition[0] |= value;

        }

    }

}

static lxdream_config_entry_t controller_get_config( maple_device_t mdev )

{

    controller_device_t dev = (controller_device_t)mdev;

    return dev->config;

}

static void controller_set_config_value( maple_device_t mdev, unsigned int key, const gchar *value )

{

    controller_device_t dev = (controller_device_t)mdev;

    assert( key < CONTROLLER_CONFIG_ENTRIES );

    input_unregister_key( dev->config[key].value, controller_key_callback, dev, config_button_map[key] );

    lxdream_set_config_value( &dev->config[key], value );

    input_register_key( dev->config[key].value, controller_key_callback, dev, config_button_map[key] );

}

static void controller_destroy( maple_device_t mdev )

{

    free( mdev );

}

/**

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

 * keys we need.

 */

static void controller_attach( maple_device_t mdev )

{

    controller_device_t dev = (controller_device_t)mdev;

    int i;

    for( i=0; i<CONTROLLER_CONFIG_ENTRIES; i++ ) {

        input_register_key( dev->config[i].value, controller_key_callback, dev, config_button_map[i] );

    }

}

static void controller_detach( maple_device_t mdev )

{

    controller_device_t dev = (controller_device_t)mdev;

    int i;

    for( i=0; i<CONTROLLER_CONFIG_ENTRIES; i++ ) {

        input_unregister_key( dev->config[i].value, controller_key_callback, dev, config_button_map[i] );

    }

}

static int controller_get_cond( maple_device_t mdev, int function, unsigned char *outbuf,

                         unsigned int *outlen )

{

    controller_device_t dev = (controller_device_t)mdev;

    if( function == MAPLE_FUNC_CONTROLLER ) {

        *outlen = 2;

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

        return 0;

    } else {

        return MAPLE_ERR_FUNC_UNSUP;

    }

}