lld_wsxxx_asp.c

Spansion 公司(原AMD flash 部门 / 富士通 闪存部门) FLASH 访问的参考函数

/******************************************************************************
* 
* lld_PpbLockBitReadCmd - Read the Ppb Lock Bit value.
* Note: Need to issue lld_PpbLockBitEntryCmd() before read.
* RETURNS: 
*
*/
FLASHDATA lld_PpbLockBitReadCmd
(
FLASHDATA *   base_addr		/* device base address in system */
)
{
  return(FLASH_RD(base_addr, 0));
}

/******************************************************************************
* 
* lld_PpbLockBitExitCmd - Exit Ppb Lock Bit mode command.
*
* RETURNS: n/a
*
*/
void lld_PpbLockBitExitCmd
(
FLASHDATA *   base_addr		/* device base address in system */
)
{
  FLASH_WR(base_addr, 0, NOR_SECSI_SECTOR_EXIT_SETUP_CMD);
  FLASH_WR(base_addr, 0, NOR_SECSI_SECTOR_EXIT_CMD);
}
#endif /* REMOVE_ASP_PPB_LOCK */

#ifndef REMOVE_ASP_DYB

/******************************************************************************
* 
* lld_DybEntryCmd - Dynamic (Volatile) Sector Protection Entry Command.
*
* RETURNS: n/a
*
*/
void lld_DybEntryCmd
(
FLASHDATA *   base_addr		/* device base address in system */
)
{

  FLASH_WR(base_addr, LLD_UNLOCK_ADDR1, NOR_UNLOCK_DATA1);
  FLASH_WR(base_addr, LLD_UNLOCK_ADDR2, NOR_UNLOCK_DATA2);

  FLASH_WR(base_addr, LLD_UNLOCK_ADDR1, WSXXX_DYB_ENTRY);
}

/******************************************************************************
* 
* lld_DybSetCmd - Dynamic (Volatile) Sector Protection Set Command.
* Note: Need to issue lld_DybEntryCmd() before issue this command.
* RETURNS: n/a
*
*/
void lld_DybSetCmd
(
FLASHDATA *   base_addr,	/* device base address in system */
ADDRESS   offset			/* sector offset address */
)
{
  FLASH_WR(base_addr, 0, NOR_UNLOCK_BYPASS_PROGRAM_CMD);
  FLASH_WR(base_addr, offset, 0x00000000);
}

/******************************************************************************
* 
* lld_DybClrCmd - Dynamic (Volatile) Sector Protection Clear Command.
* Note: Need to issue lld_DybEntryCmd() before issue this command.
* RETURNS: n/a
*
*/
void lld_DybClrCmd
(
FLASHDATA *   base_addr,	/* device base address in system */
ADDRESS   offset			/* sector offset address */
)
{
  FLASH_WR(base_addr, 0, NOR_UNLOCK_BYPASS_PROGRAM_CMD);
  FLASH_WR(base_addr, offset, WSXXX_DYB_CLEAR);
}

/******************************************************************************
* 
* lld_DybReadCmd - Dynamic (Volatile) Sector Protection Read Command.
* Note: Need to issue lld_DybEntryCmd() before issue this command.
* RETURNS: 
*
*/
FLASHDATA lld_DybReadCmd
(
FLASHDATA *   base_addr,	/* device base address in system */
ADDRESS   offset			/* sector offset address */
)
{
  return(FLASH_RD(base_addr, offset));
}

/******************************************************************************
* 
* lld_DybExitCmd - Exit Dynamic (Volatile) Sector Protection Mode Command.
*
* RETURNS: n/a
*
*/
void lld_DybExitCmd
(
FLASHDATA *   base_addr		/* device base address in system */
)
{
  FLASH_WR(base_addr, 0, NOR_SECSI_SECTOR_EXIT_SETUP_CMD);
  FLASH_WR(base_addr, 0, NOR_SECSI_SECTOR_EXIT_CMD);
}

#endif /* REMOVE_ASP_DYB */



/****************************************************************************
*                                                                            *
* Section below are example codes to do operations using Ppb commands.       *
*                                                                            *
******************************************************************************/


#ifndef REMOVE_ASP_PPB
/******************************************************************************
* 
* lld_PpbAllEraseOp - Operation to clear protection for all sections.
*
* RETURNS: 0 Successful
*         -1 Failed
*
*/
int lld_PpbAllEraseOp ( FLASHDATA *   base_addr)
{
  DEVSTATUS    dev_status = DEV_STATUS_UNKNOWN;
  unsigned long  polling_counter = 0xFFFFFFFF;
  

    if (lld_PpbLockBitReadOp(base_addr) == PPB_PROTECTED)    /* if it is already locked */
    {
       return(-1);                            /* return an error cuz Lock Bit is locked */
    }


    lld_PpbEntryCmd(base_addr, 0);
    lld_PpbAllEraseCmd(base_addr);

    /* poll for completion */
    do
    {
        polling_counter--;
        /* no checking for interrupts */

        dev_status = lld_StatusGet((FLASHDATA *)base_addr, 0);

    } while ((dev_status == DEV_BUSY) && polling_counter);

    /* if not done, then we have an error */
    if (dev_status != DEV_NOT_BUSY)
    {
        lld_ResetCmd((FLASHDATA *)base_addr);
        lld_PpbExitCmd(base_addr);
        return (-1); /* return error */
    }

    lld_PpbExitCmd(base_addr);		/* exit Ppb protection mode command */
    return 0; /* successful */
}

/******************************************************************************
* 
* lld_PpbStatusReadOp - Operation to read the Persistent Protection status register.
*
* RETURNS: FLASHDATA
*
*/

FLASHDATA lld_PpbStatusReadOp ( FLASHDATA *base_addr, ADDRESS offset)
{
   FLASHDATA  status;

   lld_PpbEntryCmd(base_addr,offset);
   status = (FLASH_RD(base_addr, offset));
   lld_PpbExitCmd(base_addr);
    
   return status;

}

/******************************************************************************
* 
* lld_PpbProgramOp - Operation set the Persistent Protection for a sector. 
*
* RETURNS: 0 Successful
*         -1 Failed
*
*/
int lld_PpbProgramOp ( FLASHDATA *base_addr, ADDRESS offset)
{
  DEVSTATUS    dev_status = DEV_STATUS_UNKNOWN;
  unsigned long  polling_counter = 0xFFFFFFFF;
  
  if (lld_PpbLockBitReadOp(base_addr) == PPB_PROTECTED)      /* if it is already locked */
  {
     return(-1);                              /* return an error cuz Lock Bit is locked */
  }


  lld_PpbEntryCmd(base_addr,offset);
  lld_PpbProgramCmd(base_addr, offset);

  /* poll for completion */
  do
  {
     polling_counter--;
     /* no checking for interrupts */
     /* poll Sector 0 for completion - workaround */
     dev_status = lld_StatusGet((FLASHDATA *)base_addr, 0);

  } while ((dev_status == DEV_BUSY) && polling_counter);

  /* if not done, then we have an error */
  if (dev_status != DEV_NOT_BUSY)
  {
     lld_ResetCmd((FLASHDATA *)base_addr);
     lld_PpbExitCmd(base_addr);
     return (-1); /* return error */
  }

  lld_PpbExitCmd(base_addr);
  return 0; /* successful */
}
#endif /* REMOVE_ASP_PPB */

#ifndef REMOVE_ASP_PPB_LOCK_BIT
/******************************************************************************
* 
* lld_PpbLockBitSetOp - Operation to set the global lock bit.
*
* RETURNS: 0 Successful
*         -1 Failed
*
*/
int lld_PpbLockBitSetOp ( FLASHDATA *   base_addr)
{ 
  DEVSTATUS      dev_status = DEV_STATUS_UNKNOWN;
  unsigned long  polling_counter = 0xFFFFFFFF;
  
    lld_PpbLockBitEntryCmd(base_addr);
    lld_PpbLockBitSetCmd(base_addr);

    /* poll for completion */
    do
    {
    	polling_counter--;
    	/* no checking for interrupts */
    
    	dev_status = lld_StatusGet((FLASHDATA *)base_addr, 0);
    
    } while ((dev_status == DEV_BUSY) && polling_counter);
    
    /* if not done, then we have an error */
    if (dev_status != DEV_NOT_BUSY)
    {
        lld_ResetCmd((FLASHDATA *)base_addr);
        lld_PpbLockBitExitCmd(base_addr);
        return (-1);  /* return error */ 
    }

    lld_PpbLockBitExitCmd(base_addr);
    return 0; /* successfull */
}

/******************************************************************************
* 
* lld_PpbLockBitReadOp - Operation to read global lock bit.
*
* RETURNS: FLASHDATA
*
*/
FLASHDATA  lld_PpbLockBitReadOp ( FLASHDATA *base_addr)
{
  FLASHDATA retval;

  (lld_PpbLockBitEntryCmd)(base_addr);
  retval = (lld_PpbLockBitReadCmd)(base_addr);
  lld_PpbLockBitExitCmd(base_addr);

  return retval;
}
#endif /* REMOVE_ASP_PPB_LOCK_BIT */



/******************************************************************************
* 
* lld_LockRegBitsReadOp - Operation to read the lock status register.
*
* RETURNS: FLASHDATA
*
*/
FLASHDATA lld_LockRegBitsReadOp ( FLASHDATA *base_addr)
{ 
  FLASHDATA value;

  lld_LockRegEntryCmd(base_addr);
  value = lld_LockRegBitsReadCmd(base_addr);
  lld_LockRegExitCmd(base_addr);

  return(value);
}

/******************************************************************************
* 
* lld_LockRegBitsProgramOp - Operation to program the lock register.
*
* RETURNS: 0 Successful
*         -1 Failed
*
*/
int lld_LockRegBitsProgramOp ( FLASHDATA *base_addr, FLASHDATA value)
{
  DEVSTATUS    dev_status = DEV_STATUS_UNKNOWN;
  unsigned long  polling_counter = 0xFFFFFFFF;

  lld_LockRegEntryCmd(base_addr);
  lld_LockRegBitsProgramCmd(base_addr,value);

  /* poll for completion */
  do
  {
      polling_counter--;
      /* no checking for interrupts */

      dev_status = lld_StatusGet((FLASHDATA *)base_addr, 0);

  } while ((dev_status == DEV_BUSY) && polling_counter);

  /* if not done, then we have an error */
  if (dev_status != DEV_NOT_BUSY)
  {
     lld_ResetCmd((FLASHDATA *)base_addr);
     lld_LockRegExitCmd(base_addr);
     return (-1); /* return error */
  }

  lld_LockRegExitCmd(base_addr);
  return 0; /* successful */
}