Subversion Repositories f9daq

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

// pcivme_ni.c - shared library for ARW pcivme interface (libpcivme.so)

//

// Copyright (C) 2002-2004 ARW Elektronik Germany

//

// this source code is published under LGPL (Open Source). You can use, redistrubute and 

// modify it unless this header  is  not modified or deleted. No warranty is given that 

// this software will work like expected.

// This product is not authorized for use as critical component in life support systems

// wihout the express written approval of ARW Elektronik Germany.

//

// Please announce changes and hints to ARW Elektronik

// 

// $Log: pcivme_ni.c,v $

// Revision 1.8  2004/08/13 19:23:45  klaus

// conversion to kernel-version 2.6, released version 3.0

//

// Revision 1.7  2002/10/20 18:07:18  klaus

// changed error handling

//

// Revision 1.6  2002/10/18 21:56:28  klaus

// completed functional features, untested

//

// Revision 1.5  2002/10/18 21:56:28  klaus

// completed functional features, untested

//

// Revision 1.4  2002/10/17 21:16:03  klaus

// filled function bodies

//

// Revision 1.3  2002/10/17 21:16:03  klaus

// filled function bodies

//

// Revision 1.2  2002/10/17 19:05:03  klaus

// VME access is working through test to lib to driver

//

// Revision 1.1  2002/10/12 22:04:30  klaus

// first work done

//

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

// INCLUDES

//

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include <linux/types.h>

#include <sys/ioctl.h>

#include <errno.h>

#include <ctype.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <../driver/pcivme.h>

#include <../driver/vic.h>

#include <pcivme_ni.h>

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

// DEFINES

//

#define LOCAL_STRING_LEN 40

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

// TYPEDEFS

//

// storage for path specific data

typedef struct

{

    int nFileNo;              // file number to f

    __u8 cAddressModifier;    // associated VME address modifier

    __u8 cAccessWidth;        // current access width

    int  nLastError;          // != 0 if a previous error occurred

} VMEMM_DEVICE;

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

// FUNCTIONS

//

// construct a device file name

static char *szDeviceName(const char *cszBaseName, int nVMEMM)

{

  static char path[LOCAL_STRING_LEN];

  int i = LOCAL_STRING_LEN - 1;

  path[0] = 0;

  memset(path, 0, LOCAL_STRING_LEN);

  if (strlen(cszBaseName) >= (LOCAL_STRING_LEN - 3))

      return "";

  if (nVMEMM > 15)

      return "";

  strncpy(path, cszBaseName, LOCAL_STRING_LEN - 3);

  while ((i--) && (path[i] != '_'));  // search for '_'

  if (i)

  {

      i++; // go after '_'

      if (nVMEMM >= 10)

      {

          path[i] = '1';

          nVMEMM -= 10;

          i++;

      }

      path[i] = '0' + nVMEMM;

      i++;

      path[i] = 0; // trailing 0

  }

  else

      return "";

  return path;

}

static int initHardware(VMEMM_DEVICE *dev)

{

    PCIVME_INIT_COMMAND init;

    init.sVie[0].bDestination = STOP;

    init.sVie[0].bAccessType  =

    init.sVie[0].dwValue      =

    init.sVie[0].wOffset      = 0;

    if (ioctl(dev->nFileNo, PCIVME_INIT_HARDWARE, &init) < 0)

    {

        dev->nLastError = errno;

        return errno;

    }

    return 0;

}

static int deInitHardware(VMEMM_DEVICE *dev)

{

    PCIVME_INIT_COMMAND deinit;

    deinit.sVie[0].bDestination = STOP;

    deinit.sVie[0].bAccessType  =

    deinit.sVie[0].dwValue      =

    deinit.sVie[0].wOffset      = 0;

    if (ioctl(dev->nFileNo, PCIVME_DEINIT_HARDWARE, &deinit) < 0)

    {

        dev->nLastError = errno;

        return errno;

    }

    return 0;

}

int VMEopen(const char *cszDeviceName, unsigned char ubAddressModifier, int *pnHandle)

{

    VMEMM_DEVICE *dev = (VMEMM_DEVICE *)NULL;

    int error;

    *pnHandle = 0;

    dev = (VMEMM_DEVICE *)malloc(sizeof(*dev));

    if (!dev)

        return errno;

    dev->nFileNo = open(cszDeviceName, O_RDWR);

    if (dev->nFileNo == -1)

    {

        error = errno;

        free(dev);

        return error;

    }

    dev->cAddressModifier = ubAddressModifier;

    *pnHandle             = (int)dev;

    error = initHardware(dev);

    if (error)

        return error;

    dev->nLastError = 0;

    return setAccessProperties(*pnHandle, dev->cAddressModifier, BYTE_ACCESS); // set access properties to default

}

int VMEinit(const char *cszDeviceName, unsigned short nVMEMM, unsigned char ubAddressModifier, int *pnHandle)

{

    char *szLocalDeviceName = szDeviceName(cszDeviceName, nVMEMM);

    return VMEopen(szLocalDeviceName, ubAddressModifier, pnHandle);

}

int setAccessProperties(int nHandle, unsigned char bModifier, unsigned char bAccessType)

{

    VMEMM_DEVICE *dev = (VMEMM_DEVICE *)nHandle;

    PCIVME_ACCESS_COMMAND access_command;

    access_command.bAccessType =

    access_command.bIncrement  = bAccessType;  // increment and accessType are the same

    access_command.bModifier   = bModifier;

    if (ioctl(dev->nFileNo, PCIVME_SET_ACCESS_PARA, &access_command) < 0)

    {

        dev->nLastError = errno;

        return errno;

    }

    dev->cAddressModifier = bModifier;

    dev->cAccessWidth     = bAccessType;

    return 0;

}

int VMEread(int nHandle, unsigned long ulAddress, unsigned char ubAccessWidth, unsigned long ulElementCount, void *pvBuffer)

{

    VMEMM_DEVICE *dev = (VMEMM_DEVICE *)nHandle;

    size_t count      = (size_t)(ulElementCount * ubAccessWidth);

    ssize_t result;

    int error;

    if (dev->cAccessWidth != ubAccessWidth)

    {

        if ((error = setAccessProperties(nHandle, dev->cAddressModifier, ubAccessWidth)))

            return error;

    }

    if (lseek(dev->nFileNo, ulAddress, SEEK_SET) < 0)

        return errno;

    result = read(dev->nFileNo, pvBuffer, count);

    if (result != count)

    {

        if (result < 0)

        {

            dev->nLastError = errno;

            return errno;

        }

        else

            return EFAULT;

    }

    return 0;

}

int VMEwrite(int nHandle, unsigned long ulAddress, unsigned char ubAccessWidth, unsigned long ulElementCount, void *pvBuffer)

{

    VMEMM_DEVICE *dev = (VMEMM_DEVICE *)nHandle;

    size_t count      = (size_t)(ulElementCount * ubAccessWidth);

    ssize_t result;

    int error;

    if (dev->cAccessWidth != ubAccessWidth)

    {

        if ((error = setAccessProperties(nHandle, dev->cAddressModifier, ubAccessWidth)))

            return error;

    }

    if (lseek(dev->nFileNo, ulAddress, SEEK_SET) < 0)

        return errno;

    result = write(dev->nFileNo, pvBuffer, count);

    if (result != count)

    {

        if (result < 0)

        {

            dev->nLastError = errno;

            return errno;

        }

        else

            return EFAULT;

    }

    return 0;

}

int VMEaccessVIC(int nHandle, unsigned char ubAccessMode, unsigned short uwAddress, unsigned char *ubContent)

{

    VMEMM_DEVICE *dev = (VMEMM_DEVICE *)nHandle;

    PCIVME_VIC68A_ACTION vic68a_action;

    vic68a_action.bAccessMode      = ubAccessMode;

    vic68a_action.bContent         = *ubContent;  

    vic68a_action.wRegisterAddress = uwAddress;

    if (ioctl(dev->nFileNo, PCIVME_ACCESS_VIC68A, &vic68a_action) < 0)

    {

        dev->nLastError = errno;

        return errno;

    }

    *ubContent = vic68a_action.bContent;

    return 0;

}

int VMEreset(int nHandle)

{

    VMEMM_DEVICE *dev = (VMEMM_DEVICE *)nHandle;

    PCIVME_RESET_COMMAND reset_command;

    int i = 10;

    reset_command.bCommand = GLOBAL_RESET_CMD;

    reset_command.bResult  = 0xff;  

    if (ioctl(dev->nFileNo, PCIVME_RESET, &reset_command) < 0)

    {

        dev->nLastError = errno;

        return errno;

    }

    do

    {

        usleep(100);

        reset_command.bCommand = POLL_RESET_CMD;

        reset_command.bResult  = 0xff;  

        if (ioctl(dev->nFileNo, PCIVME_RESET, &reset_command) < 0)

        {

            dev->nLastError = errno;

            return errno;

        }

    } while ((reset_command.bResult) && (i--));

    if (!i)

        return ETIME;

    dev->nLastError = 0;

    return 0;

}

int VMETAS(int nHandle, unsigned long ulAddress, unsigned char *ubResult)

{

    VMEMM_DEVICE *dev = (VMEMM_DEVICE *)nHandle;

    PCIVME_TAS_STRUCT tas;

    tas.bContent  = *ubResult;

    tas.bModifier = dev->cAddressModifier;  

    tas.dwAddress = ulAddress;

    if (ioctl(dev->nFileNo, PCIVME_TAS, &tas) < 0)

    {

        dev->nLastError = errno;

        return errno;

    }

    *ubResult = tas.bContent;

    return 0;

}

int VMEinterrupt(int nHandle, unsigned char *ubVector)

{

    VMEMM_DEVICE *dev = (VMEMM_DEVICE *)nHandle;

        PCIVME_VECTOR_LEVEL ubLocalVector;

    if (ioctl(dev->nFileNo, PCIVME_READ_VECTOR_POLL, &ubLocalVector) < 0)

    {

        dev->nLastError = errno;

        return errno;

    }

    *ubVector = (__u8)ubLocalVector.dwStatusID;

    return 0;

}

int VMEsysfailGet(int nHandle, BOOLEAN *bResult)

{

    VMEMM_DEVICE *dev = (VMEMM_DEVICE *)nHandle;

        PCIVME_VIC68A_ACTION sAction;    // structure to access vic chip

        sAction.wRegisterAddress = EGICR;

        sAction.bAccessMode      = VIC68A_READ;

        sAction.bContent         = 0;

    if (ioctl(dev->nFileNo, PCIVME_ACCESS_VIC68A, &sAction) < 0)

    {

        dev->nLastError = errno;

        return errno;

    }

        *bResult = (sAction.bContent & 0x08) ? FALSE : TRUE;

    return 0;

}

int VMEsysfailSet(int nHandle, BOOLEAN bForce)

{

    VMEMM_DEVICE *dev = (VMEMM_DEVICE *)nHandle;

        PCIVME_VIC68A_ACTION sAction;    // structure to access vic chip

        sAction.wRegisterAddress = ICR7;

        sAction.bAccessMode      = (bForce == TRUE) ? VIC68A_AND : VIC68A_OR;

        sAction.bContent         = (bForce == TRUE) ? 0x3F               : 0x80;

    if (ioctl(dev->nFileNo, PCIVME_ACCESS_VIC68A, &sAction) < 0)

    {

        dev->nLastError = errno;

        return errno;

    }

    return 0;

}

int VMEerror(int nHandle)

{

    __u8 ubVector;

    VMEinterrupt(nHandle, &ubVector);

    if (ubVector == 7)

        return EFAULT;  // it's a bus error

    else

        return 0;

}

int VMEclose(int nHandle)

{

    int error = 0;

    VMEMM_DEVICE *dev = (VMEMM_DEVICE *)nHandle;

    if (dev != (VMEMM_DEVICE *)NULL)

    {

        deInitHardware(dev);

        if (dev->nFileNo != -1)

            close(dev->nFileNo);

        else

            error = -EINVAL;

        free(dev);

    }

    return error;

}

int VMEcontrolInterrupt(int nHandle, BOOLEAN *bEnable)

{

    VMEMM_DEVICE *dev = (VMEMM_DEVICE *)nHandle;

        PCIVME_IRQ_CONTROL  control;

    control.bEnable = *bEnable;

    if (ioctl(dev->nFileNo, PCIVME_CONTROL_INTERRUPTS, &control) < 0)

    {

        dev->nLastError = errno;

        return errno;

    }

    // status of interrupt enable before set

    *bEnable = control.bEnable;

    return 0;

}

int GetLastError(int nHandle)

{

    VMEMM_DEVICE *dev  = (VMEMM_DEVICE *)nHandle;

    int nLocalError;

    nLocalError = dev->nLastError;

    dev->nLastError = 0;

    return nLocalError;

}