flash.h

bootloader源代码

/*****************************************
 Copyright (c) 2001-2002 
 Sigma Designs, Inc. All Rights Reserved
 Proprietary and Confidential
 *****************************************/

/* This file is part of the boot loader */

/*
 * flash.h
 *
 * flash driver from scratch
 * following CFI (Common Flash Memory Interface) Specification 2.0
 * support multiple flashes
 *
 * first revision by Ho Lee 10/31/2002
 * code cleanup by Ho Lee 11/08/2002
 */

#ifndef __BOOTLOADER_FLASH_H
#define __BOOTLOADER_FLASH_H

#include "config.h"

#ifdef SUPPORT_FLASH

// error codes

enum { FLASH_OK, FLASH_NOTEXIST, FLASH_NOREGION, FLASH_NOTREADY, FLASH_VERIFY_FAIL, FLASH_WRITE_FAULT };

// constant definitions

#define FLASH_MAX_CHIPSET				2
#define FLASH_MAX_ERASE_REGIONS			8

//
// function prototypes
//

// init & basic
int flash_found(void);
int flash_addr_found(unsigned int addr);
int flash_init(unsigned int base, int force);

// erase
int flash_erase_all(void);
int flash_erase_oneblock(unsigned int addr);
int flash_erase_region(unsigned int addr, unsigned int len);

// read / write
int flash_read_data(unsigned int addr, void *data, int len);
int flash_writable(unsigned int addr, int len);
int flash_write_onebyte(unsigned int addr, unsigned int data);
int flash_write_oneword(unsigned int addr, unsigned int data);
int flash_write_data(unsigned int addr, unsigned char *data, int len);

// miscellaneous
void flash_list(void *vpcfi);
int flash_calcblock(unsigned int addr, unsigned int *pstart, unsigned int *plen);

#endif	// SUPPORT_FLASH

#endif