#include "vdd.h"
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <winioctl.h>
#include "gpioctl.h"

/** Global variables **/
    HANDLE  hndFile;
    HANDLE  hVDD;		/* VDD module handle */
    BOOLEAN IOHook;		/* true if we installed a I/O hooked */
    static VDD_IO_PORTRANGE PortRange[2];

BOOL
VDDInitialize(
    HANDLE   hVdd,
    DWORD    dwReason,
    LPVOID   lpReserved)
{
    VDD_IO_HANDLERS  IOHandlers[2];

    hVDD = hVdd;

    switch ( dwReason ) {

    case DLL_PROCESS_ATTACH:
        hndFile = CreateFile(
                "\\\\.\\PortIODev",                    // Open the Device "file"
                GENERIC_WRITE | GENERIC_READ,
                FILE_SHARE_READ,
                NULL,
                OPEN_EXISTING,
                0,
                NULL
                );
	IOHandlers[0].inb_handler = MyInB;
	IOHandlers[0].inw_handler = NULL;
	IOHandlers[0].insb_handler = NULL;
	IOHandlers[0].insw_handler = NULL;
	IOHandlers[0].outb_handler = MyOutB;
	IOHandlers[0].outw_handler = NULL;
	IOHandlers[0].outsb_handler = NULL;
	IOHandlers[0].outsw_handler = NULL;
	PortRange[0].First = IO_PORT_FIRST1;
	PortRange[0].Last = IO_PORT_LAST1;

// Есть деловое предложение
//     IOHandlers[1]=IOHandlers[0]
	IOHandlers[1].inb_handler = MyInB;
	IOHandlers[1].inw_handler = NULL;
	IOHandlers[1].insb_handler = NULL;
	IOHandlers[1].insw_handler = NULL;
	IOHandlers[1].outb_handler = MyOutB;
	IOHandlers[1].outw_handler = NULL;
	IOHandlers[1].outsb_handler = NULL;
	IOHandlers[1].outsw_handler = NULL;
	PortRange[1].First = IO_PORT_FIRST2;
	PortRange[1].Last = IO_PORT_LAST2;

	// hook I/O mapped I/O
	IOHook = VDDInstallIOHook(hVDD, (WORD)2, PortRange, IOHandlers);
	break;

    case DLL_PROCESS_DETACH:
        // communicate to appropriate Device driver about your departure
	if (IOHook)
	    VDDDeInstallIOHook(hVDD, 2, PortRange);
        CloseHandle(hndFile);
        break;

    default:
        break;
    }

    return TRUE;
}


VOID
MyInB(
WORD	Port,
PBYTE	Buffer
)
{
ULONG PortNumber = Port;
DWORD   ReturnedLength;
DeviceIoControl(
                            hndFile,            // Handle to device
                            IOCTL_GPD_READ_PORT_UCHAR,          // IO Control code for Read
                            &PortNumber,        // Buffer to driver.
                            sizeof(PortNumber), // Length of buffer in bytes.
                            Buffer,        // Buffer from driver.
                            1,         // Length of buffer in bytes.
                            &ReturnedLength,    // Bytes placed in DataBuffer.
                            NULL                // NULL means wait till op. completes.
                            );
}

VOID
MyOutB(
WORD Port,
BYTE Data
)
{
GENPORT_WRITE_INPUT InputBuffer;
DWORD   ReturnedLength;
InputBuffer.PortNumber = Port;
InputBuffer.CharData = Data;
DeviceIoControl(
                        hndFile,                // Handle to device
                        IOCTL_GPD_WRITE_PORT_UCHAR,              // IO Control code for Write
                        &InputBuffer,           // Buffer to driver.  Holds port & data.
                        5,             // Length of buffer in bytes.
                        NULL,                   // Buffer from driver.   Not used.
                        0,                      // Length of buffer in bytes.
                        &ReturnedLength,        // Bytes placed in outbuf.  Should be 0.
                        NULL                    // NULL means wait till I/O completes.
                        );
Data = InputBuffer.CharData;
}