hal_w32.c

epson公司的一个关于s1d13706的低层驱动程序

/*-------------------------------------------------------------------------
//
// PCIGetLinAddressW32()
//
// Copyright (c) 2000, 2001 Epson Research and Development, Inc.
// All Rights Reserved.
// 
//-----------------------------------------------------------------------*/

#ifdef INTEL_W32

#pragma warning(disable:4001)   // Disable the 'single line comment' warning.
#pragma warning(disable:4206)   // Disable the 'nonstandard extension used : translation unit is empty' warning

#pragma warning(disable:4115)   // ignore "named type definition in parentheses" warning 
#pragma warning(disable:4514)   // ignore "unreferenced inline function has been removed" warning 
#pragma warning(disable:4201)   // Disable the 'nonstandard extension used : nameless struct/union'
#pragma warning(disable:4214)   // Disable the 'single line comment' warning.

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

//----------------------------------------------------------------------------

static int LinearAddress = 0;

//----------------------------------------------------------------------------
//
// _IntelGetLinAddressW32(DWORD physaddr,DWORD *linaddr)
//
// return value:
//
//      0 : No error
//      1 : Device Driver not found
//      2 : PCI bridge adapter not found
//
//----------------------------------------------------------------------------
int _IntelGetLinAddressW32(DWORD physaddr, DWORD *linaddr)
    {
    HANDLE hDriver;
    DWORD  cbReturned;
    int    rc, retVal;
    unsigned retArr[2];

    // First see if we are running under WinNT

    DWORD dwVersion = GetVersion();

    LinearAddress = 0;

    if (dwVersion < 0x80000000) 
        {
        //
        // Try to open the device
        //

        hDriver = CreateFile("\\\\.\\S1D13xxx", GENERIC_READ | GENERIC_WRITE,
                        0, NULL, OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL, NULL);
        }
    else    //Win95,98...
        {
        // Dynamically load and prepare to call S1D13xxx.
        // The FILE_FLAG_DELETE_ON_CLOSE flag is used so that CloseHandle can
        // be used to dynamically unload the VxD.
        // The CREATE_NEW flag is not necessary

        hDriver = CreateFile("\\\\.\\S1D13xxx.VXD", 0,0,0,
                        CREATE_NEW, FILE_FLAG_DELETE_ON_CLOSE, 0);
        }

    if (hDriver == INVALID_HANDLE_VALUE)
        return 1;

    //---------------------------------------------------
    //
    // From now on, the code is common for Win95 & WinNT
    //
    //---------------------------------------------------
    
    if (physaddr == 0) // map in a PCI Board
        {
        char Buffer[80];
        int boardnum = 0;

        // Check the environment for 
        // S5UBOARD=x
        // where x is a number 0,1,2,3,4,...
        // This is for those rare situations, where we have multiple
        // PCI boards and we have "assigned" a command prompt window
        // to a particular board using the environment variables.

        if (GetEnvironmentVariable("S5UBOARD",Buffer,sizeof(Buffer)))
            boardnum = atoi(Buffer);

        rc = DeviceIoControl(hDriver,IOCTL_SED_MAP_PCI_BOARD,
                &boardnum,sizeof(ULONG),retArr,2*sizeof(ULONG),&cbReturned,NULL);

        // upon exit:
        // retArr[0] : linear address
        // retArr[1] : physical address 

        if (rc)
            {
            *linaddr = retArr[0];
            LinearAddress = retArr[0];
            }
        }
    else    //the user insists on a particular physical address
        {
        retArr[0] = physaddr;
        retArr[1] = 4*1024*1024;

        rc = DeviceIoControl(hDriver,IOCTL_SED_MAP_PHYSICAL_MEMORY,
            &retArr[0],2*sizeof(ULONG),&retVal,sizeof(ULONG),&cbReturned,NULL);         

        if (rc)
            {
            *linaddr = retVal;
            LinearAddress = retVal;
            }
        }
         
    // Close the handle. This will dynamically UNLOAD the Virtual Device for Win95.

    CloseHandle(hDriver);

    if (rc)
        return 0;

    return 2;
    }

//----------------------------------------------------------------------------
//
// _IntelUnmapLinearMemory(void)
//
// return value:
//
//      0 : No error
//      1 : Device Driver not found
//      2 : PCI bridge adapter not found
//
//----------------------------------------------------------------------------

int _IntelUnmapLinearMemory(void)
   {
    HANDLE hDriver;
    DWORD  cbReturned;
    int    rc;

    // First see if we are running under WinNT

    DWORD dwVersion = GetVersion();

    if (dwVersion < 0x80000000) 
        {
        //
        // Try to open the device
        //

        hDriver = CreateFile("\\\\.\\S1D13xxx", GENERIC_READ | GENERIC_WRITE,
                        0, NULL, OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL, NULL);
        }
    else    //Win95,98...
        {
        // Dynamically load and prepare to call S1D13xxx.
        // The FILE_FLAG_DELETE_ON_CLOSE flag is used so that CloseHandle can
        // be used to dynamically unload the VxD.
        // The CREATE_NEW flag is not necessary

        hDriver = CreateFile("\\\\.\\S1D13xxx.VXD", 0,0,0,
                        CREATE_NEW, FILE_FLAG_DELETE_ON_CLOSE, 0);
        }

    if (hDriver == INVALID_HANDLE_VALUE)
        return 1;

    //---------------------------------------------------
    //
    // From now on, the code is common for Win95 & WinNT
    //
    //---------------------------------------------------
    
   rc = DeviceIoControl(hDriver, IOCTL_SED_UNMAP_LINEAR_MEMORY,
                        &LinearAddress, sizeof(PVOID), NULL, 0, &cbReturned, NULL);

   // Close the handle. This will dynamically UNLOAD the Virtual Device for Win95.

   CloseHandle(hDriver);

   if (rc)
       return 0;

    return 2;
   }

//----------------------------------------------------------------------------

#endif

//----------------------------------------------------------------------------