/*
**********************************************************************
*                          Micrium, Inc.
*                      949 Crestview Circle
*                     Weston,  FL 33327-1848
*
*                            uC/FS
*
*             (c) Copyright 2001 - 2003, Micrium, Inc.
*                      All rights reserved.
*
***********************************************************************

----------------------------------------------------------------------
File        : ide_X_hw.c
Purpose     : Generic IDE hardware layer
----------------------------------------------------------------------
Known problems or limitations with current version
----------------------------------------------------------------------
None.
---------------------------END-OF-HEADER------------------------------
*/

/*********************************************************************
*
*             #include Section
*
**********************************************************************
*/

#include "fs_conf.h"
#include "FS_ConfDefaults.h"

#if FS_USE_IDE_DRIVER

#include "ide_x_hw.h"

/*********************************************************************
*
*             #define Macros
*
**********************************************************************
*/

/* */
#define IDE_BASEADDR 0x600200

#define IDE_DATA          *(volatile unsigned short*)(IDE_BASEADDR+0)
#define IDE_FEATURE       *(volatile unsigned char*) (IDE_BASEADDR+1)
#define IDE_SECTOR_COUNT  *(volatile unsigned char*) (IDE_BASEADDR+2)
#define IDE_SECTORNO      *(volatile unsigned char*) (IDE_BASEADDR+3)
#define IDE_CYLINDERLOW   *(volatile unsigned char*) (IDE_BASEADDR+4)
#define IDE_CYLINDERHIGH  *(volatile unsigned char*) (IDE_BASEADDR+5)
#define IDE_DEVICE        *(volatile unsigned char*) (IDE_BASEADDR+6)
#define IDE_COMMAND       *(volatile unsigned char*) (IDE_BASEADDR+7)

#define IDE_BASEADDR2 0x600300
#define IDE_DEVICECONTROL *(volatile unsigned char*)(IDE_BASEADDR2+6)

#define HW__DELAY400NS()        FS_IDE_HW_X_GetAltStatus(Unit); FS_IDE_HW_X_GetAltStatus(Unit); \
                                FS_IDE_HW_X_GetAltStatus(Unit); FS_IDE_HW_X_GetAltStatus(Unit)


/*********************************************************************
*
*             Local Variables        
*
**********************************************************************
*/

/*********************************************************************
*
*             Global functions section
*
**********************************************************************
*/

/*********************************************************************
*
*             FS_IDE_HW_X_BusyLedOn
*
  Description:
  FS driver hardware layer function. Turn on busy led.

  Parameters:
  Unit        - Unit number.
 
  Return value:
  None.
*/

void FS_IDE_HW_X_BusyLedOn(FS_U8 Unit) {
}


/*********************************************************************
*
*             FS_IDE_HW_X_BusyLedOff
*
  Description:
  FS driver hardware layer function. Turn off busy led.

  Parameters:
  Unit        - Unit number.
 
  Return value:
  None.
*/

void FS_IDE_HW_X_BusyLedOff(FS_U8 Unit) {
}


/*********************************************************************
*
*             FS_IDE_HW_X_SetData
*
  Description:
  FS driver hardware layer function. Set the WR DATA register.

  Parameters:
  Unit        - Unit number.
  Data        - Data to be set.
 
  Return value:
  None.
*/

void FS_IDE_HW_X_SetData(FS_U8 Unit, FS_U16 Data) {
  IDE_DATA = Data;
}


/*********************************************************************
*
*             FS_IDE_HW_X_GetData
*
  Description:
  FS driver hardware layer function. Read the RD DATA register.

  Parameters:
  Unit        - Unit number.
 
  Return value:
  Value of the RD DATA register.
*/

FS_U16 FS_IDE_HW_X_GetData(FS_U8 Unit) {
  return IDE_DATA;
}


/*********************************************************************
*
*             FS_IDE_HW_X_SetFeatures
*
  Description:
  FS driver hardware layer function. Set the FEATURES register.

  Parameters:
  Unit        - Unit number.
  Data        - Value to write to the FEATURES register.
 
  Return value:
  None.
*/

void FS_IDE_HW_X_SetFeatures(FS_U8 Unit, unsigned char Data) {
  IDE_FEATURE = Data;
}


/*********************************************************************
*
*             FS_IDE_HW_X_GetError
*
  Description:
  FS driver hardware layer function. Read the ERROR register.

  Parameters:
  Unit        - Unit number.
 
  Return value:
  Value of the ERROR register.
*/

unsigned char FS_IDE_HW_X_GetError(FS_U8 Unit) {
  return IDE_FEATURE;
}


/*********************************************************************
*
*             FS_IDE_HW_X_SetSectorCount
*
  Description:
  FS driver hardware layer function. Set the SECTOR COUNT register.

  Parameters:
  Unit        - Unit number.
  Data        - Value to write to the SECTOR COUNT register.
 
  Return value:
  None.
*/

void FS_IDE_HW_X_SetSectorCount(FS_U8 Unit, unsigned char Data) {
  IDE_SECTOR_COUNT = Data;
}


/*********************************************************************
*
*             FS_IDE_HW_X_GetSectorCount
*
  Description:
  FS driver hardware layer function. Read the SECTOR COUNT register.

  Parameters:
  Unit        - Unit number.
 
  Return value:
  Value of the SECTOR COUNT register.
*/

unsigned char FS_IDE_HW_X_GetSectorCount(FS_U8 Unit) {
  return IDE_SECTOR_COUNT;
}


/*********************************************************************
*
*             FS_IDE_HW_X_SetSectorNo
*
  Description:
  FS driver hardware layer function. Set the SECTOR NUMBER register.

  Parameters:
  Unit        - Unit number.
  Data        - Value to write to the SECTOR NUMBER register.
 
  Return value:
  None.
*/

void FS_IDE_HW_X_SetSectorNo(FS_U8 Unit, unsigned char Data) {
  IDE_SECTORNO = Data;
}


/*********************************************************************
*
*             FS_IDE_HW_X_GetSectorNo
*
  Description:
  FS driver hardware layer function. Read the SECTOR NUMBER register.

  Parameters:
  Unit        - Unit number.
 
  Return value:
  Value of the SECTOR NUMBER register.
*/

unsigned char FS_IDE_HW_X_GetSectorNo(FS_U8 Unit) {
  return IDE_SECTORNO;
}


/*********************************************************************
*
*             FS_IDE_HW_X_SetCylLow
*
  Description:
  FS driver hardware layer function. Set the CYLINDER LOW register.

  Parameters:
  Unit        - Unit number.
  Data        - Value to write to the CYLINDER LOW register.
 
  Return value:
  None.
*/

void FS_IDE_HW_X_SetCylLow(FS_U8 Unit, unsigned char Data) {
  IDE_CYLINDERLOW = Data;
}


/*********************************************************************
*
*             FS_IDE_HW_X_GetCylLow
*
  Description:
  FS driver hardware layer function. Read the CYLINDER LOW register.

  Parameters:
  Unit        - Unit number.
 
  Return value:
  Value of the CYLINDER LOW register.
*/

unsigned char FS_IDE_HW_X_GetCylLow(FS_U8 Unit) {
  return IDE_CYLINDERLOW;
}


/*********************************************************************
*
*             FS_IDE_HW_X_SetCylHigh
*
  Description:
  FS driver hardware layer function. Set the CYLINDER HIGH register.

  Parameters:
  Unit        - Unit number.
  Data        - Value to write to the CYLINDER HIGH register.
 
  Return value:
  None.
*/

void FS_IDE_HW_X_SetCylHigh(FS_U8 Unit, unsigned char Data) {
  IDE_CYLINDERHIGH = Data;
}


/*********************************************************************
*
*             FS_IDE_HW_X_GetCylHigh
*
  Description:
  FS driver hardware layer function. Read the CYLINDER HIGH register.

  Parameters:
  Unit        - Unit number.
 
  Return value:
  Value of the CYLINDER HIGH register.
*/

unsigned char FS_IDE_HW_X_GetCylHigh(FS_U8 Unit) {
  return IDE_CYLINDERHIGH;
}


/*********************************************************************
*
*             FS_IDE_HW_X_SetDevice
*
  Description:
  FS driver hardware layer function. Set the DEVICE/HEAD register.

  Parameters:
  Unit        - Unit number.
  Data        - Value to write to the DEVICE/HEAD register.
 
  Return value:
  None.
*/

void FS_IDE_HW_X_SetDevice(FS_U8 Unit, unsigned char Data) {
  IDE_DEVICE = Data;
}


/*********************************************************************
*
*             FS_IDE_HW_X_GetDevice
*
  Description:
  FS driver hardware layer function. Read the DEVICE/HEAD register.

  Parameters:
  Unit        - Unit number.
 
  Return value:
  Value of the DEVICE/HEAD register.
*/

unsigned char FS_IDE_HW_X_GetDevice(FS_U8 Unit) {
  return IDE_DEVICE;
}


/*********************************************************************
*
*             FS_IDE_HW_X_SetCommand
*
  Description:
  FS driver hardware layer function. Set the COMMAND register.

  Parameters:
  Unit        - Unit number.
  Data        - Value to write to the COMMAND register.
 
  Return value:
  None.
*/

void FS_IDE_HW_X_SetCommand(FS_U8 Unit, unsigned char Data) {
  IDE_COMMAND = Data;
}


/*********************************************************************
*
*             FS_IDE_HW_X_GetStatus
*
  Description:
  FS driver hardware layer function. Read the STATUS register.

  Parameters:
  Unit        - Unit number.
 
  Return value:
  Value of the STATUS register.
*/

unsigned char FS_IDE_HW_X_GetStatus(FS_U8 Unit) {
  return IDE_DEVICE;
}


/*********************************************************************
*
*             FS_IDE_HW_X_SetDevControl
*
  Description:
  FS driver hardware layer function. Set the DEVICE CONTROL register.

  Parameters:
  Unit        - Unit number.
  Data        - Value to write to the DEVICE CONTROL register.
 
  Return value:
  None.
*/

void FS_IDE_HW_X_SetDevControl(FS_U8 Unit, unsigned char Data) {
  IDE_DEVICECONTROL = Data;
}


/*********************************************************************
*
*             FS_IDE_HW_X_GetAltStatus
*
  Description:
  FS driver hardware layer function. Read the ALTERNATE STATUS register.

  Parameters:
  Unit        - Unit number.
 
  Return value:
  Value of the ALTERNATE STATUS register.
*/

unsigned char FS_IDE_HW_X_GetAltStatus(FS_U8 Unit) {
  return IDE_DEVICECONTROL;
}


/*********************************************************************
*
*             FS_IDE_HW_X_DetectStatus
*
  Description:
  FS driver hardware layer function. Check if the device is present.

  Parameters:
  Unit        - Unit number.
 
  Return value:
  ==0         - Device is connected.
  !=0         - Device has not been found.
*/

char FS_IDE_HW_X_DetectStatus(FS_U8 Unit) {
  int Present;
  unsigned char a;
  unsigned char b;
  FS_IDE_HW_X_SetDevice(Unit, 0xa0);
  HW__DELAY400NS();
  FS_IDE_HW_X_SetSectorCount(Unit, 0x55);
  FS_IDE_HW_X_SetSectorNo(Unit, 0xaa);
  FS_IDE_HW_X_SetSectorCount(Unit, 0xaa);
  FS_IDE_HW_X_SetSectorNo(Unit, 0x55);
  FS_IDE_HW_X_SetSectorCount(Unit, 0x55);
  FS_IDE_HW_X_SetSectorNo(Unit, 0xaa);
  a = FS_IDE_HW_X_GetSectorCount(Unit);
  b = FS_IDE_HW_X_GetSectorNo(Unit);
  Present = (a == 0x55);
  Present = Present && (b == 0xaa);
  /* if Present is 1, we will return 0 */
  /* we have found a device */
  return (!Present);
}


/*********************************************************************
*
*             FS_IDE_HW_X_HWReset
*
  Description:
  FS driver hardware layer function. This function is called, when 
  the driver detects a new media is present. For ATA HD drives, there 
  is no action required and this function can be empty.
  When using a CF card, please be aware, that the card needs to be
  power cycled while ~OE is grounded. If the card is inserted, VCC & 
  GND will provide the card before ~OE is connected and the card will 
  be in PC Card ATA mode.

  Parameters:
  Unit        - Unit number.
  Return value:
  None.

   
*/

void FS_IDE_HW_X_HWReset(FS_U8 Unit) {
  if (Unit != 0) {
    return;
  }
}

#endif /* FS_USE_IDE_DRIVER */