/*
 * VARCem	Virtual ARchaeological Computer EMulator.
 *		An emulator of (mostly) x86-based PC systems and devices,
 *		using the ISA,EISA,VLB,MCA and PCI system buses, roughly
 *		spanning the era between 1981 and 1995.
 *
 *		This file is part of the VARCem Project.
 *
 *	  Implementation of the DTK MiniMicro series of Floppy Disk Controllers.
 *    Original code from VARCem. Fully rewritten, fixed and improved for 86Box.
 *
 * Author:	Fred N. van Kempen, <decwiz@yahoo.com>, 
 *          Tiseno100
 *
 *		Copyright 2019 Fred N. van Kempen.
 *      Copyright 2021 Tiseno100
 *
 *		Redistribution and use in source and binary forms, with
 *		or without modification, are permitted provided that the
 *		following conditions are met:
 *
 *		1. Redistributions of source code must retain the entire
 *		  above notice, this list of conditions and the following
 *		  disclaimer.
 *
 *		2. Redistributions in binary form must reproduce the above
 *		  copyright notice, this list of conditions and the
 *		  following disclaimer in the documentation and/or other
 *		  materials provided with the distribution.
 *
 *		3. Neither the name of the copyright holder nor the names
 *		  of its contributors may be used to endorse or promote
 *		  products derived from this software without specific
 *		  prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
Notes:
VARCem uses the DP8473 for both floppy disk controllers. The statement though is wrong.

MiniMicro 4 uses a Zilog Z0765A08PSC(Clone of the NEC 765)
MiniMicro 1 uses a National Semiconductor DP8473(Clone of the NEC 765 with additional NSC commands)

Issues:
MiniMicro 4 works only with a few XT machines. This statement has to be confirmed by someone with the real card itself.
MiniMicro 4 also won't work with the XT FDC which the Zilog claims to be.
*/

#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <wchar.h>
#define HAVE_STDARG_H
#include <86box/86box.h>
#include <86box/device.h>
#include <86box/io.h>
#include <86box/mem.h>
#include <86box/rom.h>
#include <86box/machine.h>
#include <86box/timer.h>
#include <86box/fdd.h>
#include <86box/fdc.h>
#include <86box/fdc_ext.h>

#define DTK_VARIANT ((info->local == 158) ? ROM_PII_158B : ROM_PII_151B)
#define DTK_CHIP ((info->local == 158) ? &fdc_xt_device : &fdc_dp8473_device)
#define BIOS_ADDR (uint32_t)(device_get_config_hex20("bios_addr") & 0x000fffff)
#define ROM_PII_151B "roms/floppy/dtk/pii-151b.rom"
#define ROM_PII_158B "roms/floppy/dtk/pii-158b.rom"

typedef struct
{
    rom_t bios_rom;
} pii_t;

static void
pii_close(void *priv)
{
    pii_t *dev = (pii_t *)priv;

    free(dev);
}

static void *
pii_init(const device_t *info)
{
    pii_t *dev;

    dev = (pii_t *)malloc(sizeof(pii_t));
    memset(dev, 0, sizeof(pii_t));

    if (BIOS_ADDR != 0)
        rom_init(&dev->bios_rom, DTK_VARIANT, BIOS_ADDR, 0x2000, 0x1ffff, 0, MEM_MAPPING_EXTERNAL);

    device_add(DTK_CHIP);

    return dev;
}

static int pii_151b_available(void)
{
    return rom_present(ROM_PII_151B);
}

static int pii_158_available(void)
{
    return rom_present(ROM_PII_158B);
}

static const device_config_t pii_config[] = {
    {
	"bios_addr", "BIOS Address:", CONFIG_HEX20, "", 0xce000, "", { 0 },
	{
		{
			"Disabled", 0
		},
		{
			"CA00H", 0xca000
		},
		{
			"CC00H", 0xcc000
		},
		{
			"CE00H", 0xce000
		},
		{
			""
		}
	}
    },
    {
	"", "", -1
    }
};

const device_t fdc_pii151b_device = {
    "DTK PII-151B (MiniMicro) Floppy Drive Controller",
    DEVICE_ISA,
    151,
    pii_init,
    pii_close,
    NULL,
    {pii_151b_available},
    NULL,
    NULL,
    pii_config};

const device_t fdc_pii158b_device = {
    "DTK PII-158B (MiniMicro4) Floppy Drive Controller",
    DEVICE_ISA,
    158,
    pii_init,
    pii_close,
    NULL,
    {pii_158_available},
    NULL,
    NULL,
    pii_config};
