#include <stdio.h>
#include <string.h>
#include <malloc.h>
#include <ogcsys.h>
#include "gecko.h"

/* Constants */
#define IOCTL_DI_READID		0x70
#define IOCTL_DI_READ		0x71
#define IOCTL_DI_WAITCVRCLOSE	0x79
#define IOCTL_DI_GETCOVER	0x88
#define IOCTL_DI_RESET		0x8A
#define IOCTL_DI_OPENPART	0x8B
#define IOCTL_DI_CLOSEPART	0x8C
#define IOCTL_DI_UNENCREAD	0x8D
#define IOCTL_DI_SEEK		0xAB
#define IOCTL_DI_STOPLASER	0xD2
#define IOCTL_DI_OFFSET		0xD9
#define IOCTL_DI_DISC_BCA	0xDA
#define IOCTL_DI_STOPMOTOR	0xE3
#define IOCTL_DI_SETWBFSMODE	0xF4

#define IOCTL_DI_SETFRAG	0xF9
#define IOCTL_DI_GETMODE	0xFA
#define IOCTL_DI_HELLO		0xFB

/* Variables */
static u32 inbuf[8]  ATTRIBUTE_ALIGN(32);
static u32 outbuf[8] ATTRIBUTE_ALIGN(32);

static const char di_fs[] ATTRIBUTE_ALIGN(32) = "/dev/di";
static s32 di_fd = -1;


s32 WDVD_Init(void)
{
	/* Open "/dev/di" */
	if (di_fd < 0) {
		di_fd = IOS_Open(di_fs, 0);
		if (di_fd < 0)
			return di_fd;
	}

	return 0;
}

s32 WDVD_Close(void)
{
	/* Close "/dev/di" */
	if (di_fd >= 0) {
		IOS_Close(di_fd);
		di_fd = -1;
	}

	return 0;
}

s32 WDVD_GetHandle(void)
{
	/* Return di handle */
	return di_fd;
}

s32 WDVD_Reset(void)
{
	memset(inbuf, 0, sizeof(inbuf));

	/* Reset drive */
	inbuf[0] = IOCTL_DI_RESET << 24;
	inbuf[1] = 1;

	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_RESET, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf));
	if (ret < 0) return ret;

	return (ret == 1) ? 0 : -ret;
}

s32 WDVD_ReadDiskId(void *id)
{
	memset(inbuf, 0, sizeof(inbuf));

	/* Read disc ID */
	inbuf[0] = IOCTL_DI_READID << 24;

	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_READID, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf));
	if (ret < 0) return ret;

	if (ret == 1)
	{
		memcpy(id, outbuf, sizeof(dvddiskid));
		return 0;
	}

	return -ret;
}

s32 WDVD_Seek(u64 offset)
{
	memset(inbuf, 0, sizeof(inbuf));

	/* Drive seek */
	inbuf[0] = IOCTL_DI_SEEK << 24;
	inbuf[1] = (u32)(offset >> 2);

	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_SEEK, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf));
	if (ret < 0) return ret;

	return (ret == 1) ? 0 : -ret;
}

s32 WDVD_Offset(u64 offset) 
{
    //u32 *off = (u32 *)((void *)&offset);
	union { u64 off64; u32 off32[2]; } off;
	off.off64 = offset;

    memset(inbuf, 0, sizeof(inbuf));

    /* Set offset */
    inbuf[0] = IOCTL_DI_OFFSET << 24;
    inbuf[1] = (off.off32[0]) ? 1: 0;
    inbuf[2] = (off.off32[1] >> 2);

    s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_OFFSET, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf));
    if (ret < 0) return ret;

    return (ret == 1) ? 0 : -ret;
}

s32 WDVD_StopLaser(void)
{
	memset(inbuf, 0, sizeof(inbuf));

	/* Stop laser */
	inbuf[0] = IOCTL_DI_STOPLASER << 24;

	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_STOPLASER, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf));
	if (ret < 0) return ret;

	return (ret == 1) ? 0 : -ret;
}

s32 WDVD_StopMotor(void)
{
	memset(inbuf, 0, sizeof(inbuf));

	/* Stop motor */
	inbuf[0] = IOCTL_DI_STOPMOTOR << 24;

	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_STOPMOTOR, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf));
	if (ret < 0) return ret;

	return (ret == 1) ? 0 : -ret;
}

s32 WDVD_Eject(void)
{
	memset(inbuf, 0, sizeof(inbuf));

	/* Stop motor */
	inbuf[0] = IOCTL_DI_STOPMOTOR << 24;
	/* Eject DVD */
	inbuf[1] = 1;

	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_STOPMOTOR, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf));
	if (ret < 0) return ret;

	return (ret == 1) ? 0 : -ret;
}

s32 WDVD_OpenPartition(u64 offset, void* Ticket, void* Certificate, unsigned int Cert_Len, void* Out)
{
	static ioctlv Vectors[5] ATTRIBUTE_ALIGN(32);

	memset(inbuf, 0, sizeof inbuf);
	memset(outbuf, 0, sizeof outbuf);

	inbuf[0] = IOCTL_DI_OPENPART << 24;
	inbuf[1] = offset >> 2;

	Vectors[0].data		= inbuf;
	Vectors[0].len		= 0x20;
	Vectors[1].data		= (Ticket == NULL) ? 0 : Ticket;
	Vectors[1].len		= (Ticket == NULL) ? 0 : 0x2a4;
	Vectors[2].data		= (Certificate == NULL) ? 0 : Certificate;
	Vectors[2].len		= (Certificate == NULL) ? 0 : Cert_Len;
	Vectors[3].data		= Out;
	Vectors[3].len		= 0x49e4;
	Vectors[4].data		= outbuf;
	Vectors[4].len		= 0x20;

	s32 ret = IOS_Ioctlv(di_fd, IOCTL_DI_OPENPART, 3, 2, Vectors);
	if (ret < 0) return ret;

	return (ret == 1) ? 0 : -ret;
}

s32 WDVD_ClosePartition(void)
{
	memset(inbuf, 0, sizeof(inbuf));

	/* Close partition */
	inbuf[0] = IOCTL_DI_CLOSEPART << 24;

	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_CLOSEPART, inbuf, sizeof(inbuf), NULL, 0);
	if (ret < 0) return ret;

	return (ret == 1) ? 0 : -ret;
}

s32 WDVD_UnencryptedRead(void *buf, u32 len, u64 offset)
{
	memset(inbuf, 0, sizeof(inbuf));

	/* Unencrypted read */
	inbuf[0] = IOCTL_DI_UNENCREAD << 24;
	inbuf[1] = len;
	inbuf[2] = (u32)(offset >> 2);

	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_UNENCREAD, inbuf, sizeof(inbuf), buf, len);
	if (ret < 0) return ret;

	return (ret == 1) ? 0 : -ret;
}

s32 WDVD_Read(void *buf, u32 len, u64 offset)
{
	memset(inbuf, 0, sizeof(inbuf));

	/* Disc read */
	inbuf[0] = IOCTL_DI_READ << 24;
	inbuf[1] = len;
	inbuf[2] = (u32)(offset >> 2);

	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_READ, inbuf, sizeof(inbuf), buf, len);
	if (ret < 0) return ret;

	return (ret == 1) ? 0 : -ret;
}

s32 WDVD_WaitForDisc(void)
{
	memset(inbuf, 0, sizeof(inbuf));

	/* Wait for disc */
	inbuf[0] = IOCTL_DI_WAITCVRCLOSE << 24;

	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_WAITCVRCLOSE, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf));
	if (ret < 0) return ret;

	return (ret == 1) ? 0 : -ret;
}

s32 WDVD_GetCoverStatus(u32 *status)
{
	memset(inbuf, 0, sizeof(inbuf));

	/* Get cover status */
	inbuf[0] = IOCTL_DI_GETCOVER << 24;

	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_GETCOVER, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf));
	if (ret < 0) return ret;

	if (ret == 1) {
		/* Copy cover status */
		memcpy(status, outbuf, sizeof(u32));

		return 0;
	}

	return -ret;
}

s32 WDVD_SetUSBMode(u32 mode, const u8 *id, s32 partition) 
{
    memset(inbuf, 0, sizeof(inbuf));

    /* Set USB mode */
    inbuf[0] = IOCTL_DI_SETWBFSMODE << 24;
    inbuf[1] = (id) ? mode : 0;

    /* Copy ID */
    if (id)
	{
        memcpy(&inbuf[2], id, 6);
		if(partition >= 0) inbuf[5] = partition;
    }

    s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_SETWBFSMODE, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf));

    if (ret < 0) return ret;
    return (ret == 1) ? 0 : -ret;
}

s32 WDVD_Read_Disc_BCA(void *buf)
{
	memset(inbuf, 0, sizeof(inbuf));

	/* Disc read */
	inbuf[0] = IOCTL_DI_DISC_BCA << 24;
	//inbuf[1] = 64;

	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_DISC_BCA, inbuf, sizeof(inbuf), buf, 64);
	if (ret < 0) return ret;

	return (ret == 1) ? 0 : -ret;
}

// frag

s32 WDVD_SetFragList(int device, void *fraglist, int size)
{
	memset(inbuf, 0, sizeof(inbuf));
	memset(outbuf, 0, sizeof(outbuf));

	/* Set FRAG mode */
	inbuf[0] = IOCTL_DI_SETFRAG << 24;
	inbuf[1] = device;
	inbuf[2] = (u32)fraglist;
	inbuf[3] = size;

	DCFlushRange(fraglist, size);
	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_SETFRAG, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf));
	if (ret < 0) return ret;

	return (ret == 1) ? 0 : -ret;
}

#define IOCTL_DI_HELLO		0xFB

s32 WDVD_hello(u32 *status)
{
	memset(inbuf, 0, sizeof(inbuf));

	inbuf[0] = IOCTL_DI_HELLO << 24;

	s32 ret = IOS_Ioctl(di_fd, IOCTL_DI_HELLO, inbuf, sizeof(inbuf), outbuf, sizeof(outbuf));
	if (ret < 0) return ret;

	if (ret == 1)
	{
		if (status) memcpy(status, outbuf, sizeof(u32));
		ghexdump(outbuf, 12);
		return 0;
	}

	return -ret;
}