/*

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.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#define WIN32_LEAN_AND_MEAN

#include <windows.h>
#include <winioctl.h>
#include "porttalk_IOCTL.h"


// Globals
extern BOOL bWindowsNT;
HANDLE hFddDev=INVALID_HANDLE_VALUE;


void outportb(UINT portid, BYTE value)
{
	__asm mov edx,portid
	__asm mov al,value
	__asm out dx,al
}

BOOL OpenFddDevice(void)
{
	if (!bWindowsNT)
		return TRUE;

	if((hFddDev = CreateFile("\\\\.\\PortTalk", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)) == INVALID_HANDLE_VALUE)
		return FALSE;

	return TRUE;
}

BOOL ToggleFddLight(BYTE drive, BYTE status)
{
	DWORD BytesReturned;        
	unsigned char Buffer[3];
	unsigned short *pBuffer;
	BYTE value = status<<(drive|4)|drive|12;

	if (!bWindowsNT) {
		outportb(0x3F2, value);
		return TRUE;
	}

	if (hFddDev == INVALID_HANDLE_VALUE)
		return FALSE;

	pBuffer = (unsigned short *)&Buffer[0];
	*pBuffer = 0x3F2;
	Buffer[2] = (unsigned char)value;

	if (!DeviceIoControl(hFddDev, IOCTL_WRITE_PORT_UCHAR, &Buffer, 3, NULL, 0, &BytesReturned, NULL))
		return FALSE;

	return TRUE;
}

void CloseFddDevice(void)
{
	if (!bWindowsNT)
		return;

	if (hFddDev != INVALID_HANDLE_VALUE)
		CloseHandle(hFddDev);
}