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//=============================================================================

//

//      i557_eep.h - Cyclone Diagnostics

//

//=============================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

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

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

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//

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// or inline functions from this file, or you compile this file and link it

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//####ECOSGPLCOPYRIGHTEND####

//=============================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):   Scott Coulter, Jeff Frazier, Eric Breeden

// Contributors:

// Date:        2001-01-25

// Purpose:     

// Description: 

//

//####DESCRIPTIONEND####

//

//===========================================================================*/

/* Public define's and function prototypes */

#define EEPROM_SIZE                     128     /* Maximum # bytes in serial eeprom */

#define EEPROM_WORD_SIZE        64      /* Maximum # shorts in serial eeprom */

/* result codes for the functions below */

#define OK                                              0        /* Operation completed successfully */

#define EEPROM_ERROR                    1       /* generic error */

#define EEPROM_NOT_RESPONDING   2       /* eeprom not resp/not installed */

#define EEPROM_TO_SMALL                 3       /* req write/read past end of eeprom */

#define EEPROM_INVALID_CMD      4       /* op code not supported */

/* layout of the Serial EEPROM register */

#define I557_EESK               (1 << 0)

#define I557_EECS               (1 << 1)

#define I557_EEDI               (1 << 2)

#define I557_EEDO               (1 << 3)

/* EEPROM commands */

#define EEPROM_WRITE    1

#define EEPROM_READ             2

#define EEPROM_ERASE    3

#define EEPROM_EWEN     4

#define EEPROM_EWDS             5

#define EEPROM_EWEN_OP  0x30

#define EEPROM_EWDS_OP  0x00

/* EEPROM Chip Select */

#define SELECT_557_EEP(n)       (*(unsigned char *)(n+0x0e) |= I557_EECS)

#define DESELECT_557_EEP(n)     (*(unsigned char *)(n+0x0e) &= ~I557_EECS)

/* EEPROM Serial Clock */

#define SK_HIGH_557_EEP(n)      (*(unsigned char *)(n+0x0e) |= I557_EESK)

#define SK_LOW_557_EEP(n)       (*(unsigned char *)(n+0x0e) &= ~I557_EESK)

/* EEPROM Serial Data In -> out to eeprom */

#define EEDI_HIGH_557_EEP(n)    (*(unsigned char *)(n+0x0e) |= I557_EEDI)

#define EEDI_LOW_557_EEP(n)     (*(unsigned char *)(n+0x0e) &= ~I557_EEDI)

/* EEPROM Serial Data Out -> in from eeprom */

#define EEDO_557_EEP(n) ((*(unsigned char *)(n+0x0e) & I557_EEDO) >> 3)

/* global functions declared in serial_eep.c */

int eeprom_read (unsigned long pci_addr,

                 int eeprom_addr,       /* word offset from start of eeprom */

                 unsigned short *p_data,/* buffer pointer */

                 int nwords             /* number of bytes to read */

                 );