// File: PCIUtil.H
// Purpose: routines for handling PCI devices
// Autor: M. Czamai, PEAK-System Technik GmbH, Darmstadt, Germany
// Date: 11/2000

#ifndef __PCI_UTIL_H__
#define __PCI_UTIL_H__

#include <DPMI.h>                       // def. of _go32_dpmi_seginfo
#include "MyTypes.H"                    // custom datatypes

// PEAK specific card entries
#define PCI_PEAK_VID            0x001C  // VendorID & SubVendorID
#define PCI_PEAK_DID            0x0001  // DeviceID (= chipset)

// PCI function codes for using the INT 1Ah service routine
#define PCI_BIOS_INT		 0x1A
#define PCI_FUNCTION_ID		 0xB1
#define PCI_BIOS_PRESENT	 0x01
#define PCI_FIND_DEVICE		 0x02
#define PCI_READ_CONFIG_BYTE	 0x08
#define PCI_WRITE_CONFIG_BYTE	 0x0B
#define PCI_READ_CONFIG_WORD	 0x09
#define PCI_WRITE_CONFIG_WORD	 0x0C
#define PCI_READ_CONFIG_DWORD	 0x0A
#define PCI_WRITE_CONFIG_DWORD	 0x0D
#define PCI_GET_IRQ_ROUTING_OPT  0x0E
#define PCI_SET_HARDWARE_IRQ     0x0F

// PCI return codes for using the INT 1Ah service routine
#define PCI_SUCCESSFUL		 0x00
#define PCI_BAD_VENDOR_ID        0x83
#define PCI_DEVICE_NOT_FOUND	 0x86
#define PCI_BAD_REGISTER_NUMBER	 0x87
#define PCI_SET_FAILED		 0x88
#define PCI_BUFFER_TOO_SMALL	 0x89

// general PCI error codes
#define BAD_VENDOR_ID            0xFFFF
#define INVALID_BASE_ADR         0xFFFF
#define NOT_CONNECTED_TO_IRQ     0xFF


// constants for DPMI functions
#define DETECT_CPU_MODE          0x2F
#define DPMI_FAIL                -1

// structure for mapping adresses in the memmory adress space
typedef struct tagMemInfo
{ DWORD dwPhysical;
  DWORD dwLinear;
  DWORD dwSize;
  WORD  wSelector;
}MemInfo;


typedef struct tagPCIDev
{
  WORD wVendorID;                       // Vendor ID
  WORD wDeviceID;                       // Device ID
  WORD wSubSysDID;                      // subsytem Device ID

  BYTE bBusNo;
  BYTE bDevNo;
  BYTE bFuncNo;
  bool fValid;                          // bBusNo, bDevNo and bFuncNo are valid

  MemInfo* pRegInternal;                // base adress of internal registers
  MemInfo* pRegCAN[2];                  // base adress of CAN controller(s)

  BYTE bIRQ;                            // interrupt line: 0xFF == invalid
  _go32_dpmi_seginfo* pINTHandler;      // used interrupt handler
  _go32_dpmi_seginfo* pOldINTHandler;   // old interrupt handler (restore before exit)
}PCIDev;

PCIDev PCIFindDevice(WORD wVendorID, WORD wDeviceID, WORD wIndex);
bool PCANPCIInit(PCIDev& Dev, BYTE bNo, WORD wBitRate);

#endif //  __PCI_UTIL_H__