flash.c

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//=============================================================================
//
//      flash.c - Cyclone Diagnostics
//
//=============================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. However the source code for this file must still be made available
// in accordance with section (3) of the GNU General Public License.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):   Scott Coulter, Jeff Frazier, Eric Breeden
// Contributors:
// Date:        2001-01-25
// Purpose:     
// Description: 
//
//####DESCRIPTIONEND####
//
//===========================================================================*/

#include <redboot.h>
#ifdef CYGPKG_IO_FLASH
#include <cyg/io/flash.h>

#include "iq80310.h"	/* 80310 chip set specific */
#include "7_segment_displays.h"
#include "test_menu.h"

typedef unsigned char FLASH_TYPE;
#define MASK 0xff  /* for 1 bank */

/* 28F016S5/28F640J3A Command Definitions  - First Bus Cycle */
#define RESET_CMD		(0xffffffff & MASK)
#define WRITE_TO_BUF_CMD	(0xe8e8e8e8 & MASK)
#define WRITE_CONFIRM_CMD	(0xd0d0d0d0 & MASK)
#define READ_ID_CMD		(0x90909090 & MASK)
#define READ_STAT_REG		(0x70707070 & MASK)
#define CLEAR_STAT_REG		(0x50505050 & MASK)
#define ERASE_CMD		(0x20202020 & MASK)
#define PROGRAM_CMD		(0x40404040 & MASK)
#define BEP_SUSPEND		(0xb0b0b0b0 & MASK)
#define BEP_RESUME		(0xd0d0d0d0 & MASK)
#define LOCK_CMD		(0x60606060 & MASK)
#define CLEAR_LOCK_BIT_SETUP	(0x60606060 & MASK)	/* 10/06/00 */

/* 28F016S5/28F640J3A Command Definitions  - Second Bus Cycle */
#define ERASE_CONFIRM		(0xd0d0d0d0 & MASK)
#define LOCK_BLOCK_CONFIRM	(0x01010101 & MASK)
#define MASTER_LOCK_CONFIRM	(0xf1f1f1f1 & MASK)  /* DO NOT EVER set master enable bit!!! */
#define UNLOCK_BLOCK_CONFIRM	(0xd0d0d0d0 & MASK)
#define CLEAR_LOCK_BIT_CONFIRM	(0xd0d0d0d0 & MASK)	/* 10/06/00 */

/* Flash category definitions */
#define SECTOR_PROG	0
#define BLOCK_PROG	1

/* status register bits */
#define WSM_READY		(FLASH_TYPE) (1 << 7)
#define WSM_BUSY		(FLASH_TYPE) (0 << 7)
#define BE_SUSPENDED		(FLASH_TYPE) (1 << 6)
#define BE_COMPLETED		(FLASH_TYPE) (0 << 6)
#define ERASE_UNLOCK_ERROR	(FLASH_TYPE) (1 << 5)
#define ERASE_UNLOCK_SUCCESS	(FLASH_TYPE) (0 << 5)
#define CLEAR_LOCK_BIT_ERROR	(FLASH_TYPE) (1 << 5)	/* 10/06/00 */
#define CLEAR_LOCK_BIT_SUCCESS	(FLASH_TYPE) (0 << 5)	/* 10/06/00 */
#define PROGRAM_LOCK_ERROR	(FLASH_TYPE) (1 << 4)
#define PROGRAM_LOCK_SUCCESS	(FLASH_TYPE) (0 << 4)
#define SET_LOCK_BIT_ERROR	(FLASH_TYPE) (1 << 4)	/* 10/17/00 */
#define SET_LOCK_BIT_SUCCESS	(FLASH_TYPE) (0 << 4)	/* 10/17/00 */
#define VPP_LOW_DETECT		(FLASH_TYPE) (1 << 3)
#define VPP_OK			(FLASH_TYPE) (0 << 3)
#define PROGRAM_SUSPENDED	(FLASH_TYPE) (1 << 2)
#define PROGRAM_COMPLETED	(FLASH_TYPE) (0 << 2)
#define DEVICE_PROTECTED	(FLASH_TYPE) (1 << 1)
#define DEVICE_UNLOCKED		(FLASH_TYPE) (0 << 1)


/* Other Intel 28F016S5/28F640J3A definitions */
#define CMD_SEQ_ERR		(FLASH_TYPE) (ERASE_UNLOCK_ERROR | PROGRAM_LOCK_ERROR)
#define ALL_FLASH_STATUS	(FLASH_TYPE) (0xfe)
#define UNKNOWN_ERR		(FLASH_TYPE) (0xff)

#define TEST_BUF_LONGS		16384
#define TEST_BUF_CHARS		65536

#define MADE_BY_INTEL		(0x89898989 & MASK)		/* Manufacturer Code, read at address 0, note that address bit A0 is not used in x8 or x16 mode when obtaining identifier code */

#define I28F640J3A		(0x17171717 & MASK)		/* Device Code, read at address 1, note that bit address A0 is not used in x8 or x16 mode when obtaining identifier code */

/*#define FLASH_BLOCK_SIZE	0x10000*/	/* 28F016S5 */
#define FLASH_BLOCK_SIZE	0x20000		/* 28F640J3A */

#define BLOCK_LOCKED		1
#define BLOCK_UNLOCKED		0

// First 4K page of flash at physical address zero is
// virtually mapped at address 0xd0000000.
#define FLASH_P2V(x) ((volatile FLASH_TYPE *)(((unsigned)(x) < 0x1000) ?  \
                           ((unsigned)(x) | 0xd0000000) :  \
                           (unsigned)(x)))


unsigned long *flash_buffer = (unsigned long *)0xa1000000;

int cmd_stat;						

extern void _flushICache(void);
extern void _enableICache(void);
extern void _disableICache(void);
extern void _switchMMUpageTables(void);
extern void _usec_delay(void);
extern void _msec_delay(void);

unsigned long eeprom_size;
unsigned long flash_base;

ADDR eeprom_prog_first, eeprom_prog_last;

extern long hexIn(void);
extern char *sgets(char *s);

/* forward declarations */
void init_eeprom(void) RAM_FUNC_SECT;
int check_eeprom(ADDR addr, unsigned long length) RAM_FUNC_SECT;
int check_bstat(int block_num) RAM_FUNC_SECT;
int set_all_lock_bits(void) RAM_FUNC_SECT;		/* 10/11/00 added */
int clear_all_lock_bits(ADDR addr) RAM_FUNC_SECT;	/* 10/06/00 added */
int erase_eeprom(ADDR addr, unsigned long length) RAM_FUNC_SECT;
int write_eeprom(ADDR start_addr, const void *data_arg, int data_size) RAM_FUNC_SECT;
void flash_test(MENU_ARG arg) RAM_FUNC_SECT;
void display_val(int num) RAM_FUNC_SECT;
void display_out (int msb_flag, unsigned char val) RAM_FUNC_SECT;

#define MSB_DISPLAY_REG		(volatile unsigned char *)0xfe840000
#define LSB_DISPLAY_REG		(volatile unsigned char *)0xfe850000

void display_out (int msb_flag, unsigned char val)
{
    volatile unsigned char *ledPtr;

    if (msb_flag)
	ledPtr = MSB_DISPLAY_REG;
    else
	ledPtr = LSB_DISPLAY_REG;

    *ledPtr = SevSegDecode[val & 0xf];
}

void display_val (int number)
{
    unsigned char disp_val = number % 256;
    unsigned char msb, lsb;

    lsb = disp_val & 0x0f;
    msb = (disp_val & 0xf0) >> 4;

    display_out (0, lsb);
    display_out (1, msb);
}

/********************************************************/
/* INIT FLASH						*/
/*							*/
/* This routine initializes the variables for timing    */
/* with any board configuration.  This is used to get   */
/* exact timing every time.				*/
/********************************************************/
void init_eeprom(void)
{
    unsigned char MfgCode=MADE_BY_INTEL;
    unsigned char DevCode=I28F640J3A;

    eeprom_size = 0x800000;

    printf( "\nManufacturer Code = 0x%x\n", MfgCode);
    printf( "Device Code = %x\n", DevCode);
    printf( "Flash Memory size = 0x%x\n", eeprom_size);

    return;
}

/********************************************************/
/* CHECK EEPROM						*/
/* Check if Flash is Blank				*/
/*							*/
/* returns OK if it is; returns ERROR and sets cmd_stat */
/* to an error code if memory region is not Flash or if */
/* it is not blank.					*/
/*							*/
/********************************************************/
int check_eeprom(ADDR addr, unsigned long length)
{
    FLASH_TYPE *p, *end;

    if (eeprom_size == 0) {
	cmd_stat = E_NO_FLASH;
	return ERR;
    }

    if (addr == NO_ADDR) {
	addr = FLASH_BLK4_BASE_ADDR;	/* start at base address of block */
	length = eeprom_size - RESERVED_AREA_SIZE;
    } else if (length == 0)
	length = 1;

    p = (FLASH_TYPE *)addr;

    end = (FLASH_TYPE *)FLASH_TOP_ADDR; 
    /* search for first non blank address starting at base address of Flash Block 2 */
    while (p != end) {
	if (*FLASH_P2V(p) != 0xff) {
	    eeprom_prog_first = (ADDR)p;	/* found first non blank memory cell */
	    
	    /* now find last non blank memory cell starting from top of Flash memory */
	    for (p = end - 1; *FLASH_P2V(p) == 0xff; --p)
		;
	    eeprom_prog_last = (ADDR)p;	/* found last non blank memory cell */ 
	    
	    cmd_stat = E_EEPROM_PROG;

	    return ERR;
        }
	p++;
    }
    return OK;
}

/********************************************************/
/* SET ALL LOCK BITS					*/
/*							*/
/* returns OK if successful; otherwise returns ERROR    */
/* and sets cmd_stat to an error code			*/
/* The 28F640J3A is divided into 64, 128Kbyte blocks	*/
/* This routine sets a lock bit in the block specified  */
/* by a given address					*/
/********************************************************/
int set_all_lock_bits()
{
    unsigned long addr = 0x0; 
    void *err_addr;
    int stat;

    if ((stat = flash_lock((void *)addr, 4 * FLASH_BLOCK_SIZE, (void **)&err_addr)) != 0)
	return stat;

    return( OK );
}


/********************************************************/
/* CLEAR ALL LOCK BITS					*/
/*							*/
/* returns OK if successful; otherwise returns ERROR    */
/* and sets cmd_stat to an error code			*/
/* The 28F640J3A is divided into 64, 128Kbyte blocks	*/
/* This routine clears all block lock bits	 	*/
/********************************************************/