flash.c

s3c2410下的tftp固件程序

/*********************************************************************************************
* File：	flash.c
* Author:	Embest	
* Desc：	source code  of flash 
* History:	
*			
*********************************************************************************************/
#include "flash.h"


#define OS_CRITICAL_METHOD	0
#define OS_CPU_SR			unsigned int
#define OS_ENTER_CRITICAL()
#define OS_EXIT_CRITICAL()


/*------------------------------------------------------------------------------------------*/
/*	 								static global variables                                 */
/*------------------------------------------------------------------------------------------*/
static unsigned short id_man, id_dev, id_ade;                   // Flash ID

/*********************************************************************************************
* name:		Flash_Delay
* func:		flash delay
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
static void Flash_Delay(void)
{
	volatile unsigned int i;
	
	// delay about 70 us
	//for(i=0; i<231; i++);
	for(i=0; i<21; i++);		// R.X.Huang 2005-04-28 modified for EduKit II 2410
}

/*********************************************************************************************
* name:		FlashID_AT49BV1614A
* func:		about flash ID
* para:		unsigned int base_addr  --  base_addr of flash AT49BV1614A
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
static void FlashID_AT49BV1614A(unsigned int base_addr)
{
    #if OS_CRITICAL_METHOD == 3
        OS_CPU_SR  cpu_sr;
    #endif
	base_addr &= ~AT49BV1614A_FLASH_MASK;

	OS_ENTER_CRITICAL();
	
	// enter read ID mode 
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0xAA;
	*(volatile unsigned short *)(base_addr + (0xAAA<<1)) = 0x55;
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0x90;
	
	// read ID
	id_man = *(volatile unsigned short *)(base_addr + (0x00<<1));
	id_dev = *(volatile unsigned short *)(base_addr + (0x01<<1));
	id_ade = *(volatile unsigned short *)(base_addr + (0x03<<1));
	
	// exit read ID mode 
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0xAA;
	*(volatile unsigned short *)(base_addr + (0xAAA<<1)) = 0x55;
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0xF0;
	
	OS_EXIT_CRITICAL();
}


/*********************************************************************************************
* name:		FlashEraseSector_AT49BV1614A
* func:		erase flash sector
* para:		unsigned int base_addr  --  base_addr of flash AT49BV1614A
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
static void FlashEraseSector_AT49BV1614A(unsigned int base_addr)
{
    #if OS_CRITICAL_METHOD == 3
        OS_CPU_SR  cpu_sr;
    #endif
    
	unsigned int i, sector_addr;

 	sector_addr = (base_addr & AT49BV1614A_FLASH_MASK);
	sector_addr >>= 1;
	sector_addr <<= 1;
	base_addr &= ~AT49BV1614A_FLASH_MASK;

	OS_ENTER_CRITICAL();
	
	// enter erase sector mode 
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0xAA;
	*(volatile unsigned short *)(base_addr + (0xAAA<<1)) = 0x55;
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0x80;
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0xAA;
	*(volatile unsigned short *)(base_addr + (0xAAA<<1)) = 0x55;
	*(volatile unsigned short *)(base_addr + (sector_addr)) = 0x30;
	
	// delay about 420 ms 
	for(i=0; i<6000; i++)
		Flash_Delay();
	OS_EXIT_CRITICAL();
}


/*********************************************************************************************
* name:		FlashProgram_AT49BV1614A
* func:		program  flash
* para:		unsigned int base_addr      --  base_addr of flash AT49BV1614A
*           unsigned short *data_addr   --  address of data to be programmed
*           unsigned int bytes          --  bytes of data to be programmed 
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
static void FlashProgram_AT49BV1614A(unsigned int base_addr, unsigned short *data_addr, unsigned int bytes)
{
    #if OS_CRITICAL_METHOD == 3
        OS_CPU_SR  cpu_sr;
    #endif
	unsigned int i, word_addr;

 	word_addr = (base_addr & AT49BV1614A_FLASH_MASK);
	base_addr &= ~AT49BV1614A_FLASH_MASK;

	if(bytes % 2)
		bytes += 1;
	bytes >>= 1;

	// enter program mode 
	for(i=0; i<bytes; i++)
	{
		OS_ENTER_CRITICAL();
		*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0xAA;
		*(volatile unsigned short *)(base_addr + (0xAAA<<1)) = 0x55;
		*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0xA0;
		*(volatile unsigned short *)(base_addr + (word_addr)) = data_addr[i];
		
		// delay 50 us 
		Flash_Delay();
		word_addr += sizeof(unsigned short);
		OS_EXIT_CRITICAL();
	}
}


/*********************************************************************************************
* name:		FlashSectorSize_AT49BV1614A
* func:		get flash sector size of AT49BV1614A
* para:		unsigned int base_addr      --  base_addr of flash AT49BV1614A
* ret:		sector size of AT49BV1614A(unsigned int)
* modify:
* comment:		
*********************************************************************************************/
static unsigned int FlashSectorSize_AT49BV1614A(unsigned int base_addr)
{
	unsigned int sector_addr = (base_addr & AT49BV1614A_FLASH_MASK);

	if(sector_addr >= 0x00 && sector_addr < 0x10000)
		return (8*1024);
	else if(sector_addr >= 0x10000 && sector_addr < 0x200000)
		return (64*1024);
	else
		return 0;
}


/*********************************************************************************************
* name:		FlashID_AM29LV160DB
* func:		about flash ID
* para:		unsigned int base_addr  --  base_addr of flash AM29LV160DB
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
static void FlashID_AM29LV160DB(unsigned int base_addr)
{
    #if OS_CRITICAL_METHOD == 3
        OS_CPU_SR  cpu_sr;
    #endif
	base_addr &= ~AM29LV160DB_FLASH_MASK;

	OS_ENTER_CRITICAL();
	
	// enter read man_ID mode
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0xAA;
	*(volatile unsigned short *)(base_addr + (0x2AA<<1)) = 0x55;
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0x90;
	
	// read man_ID 
	id_man = *(volatile unsigned short *)(base_addr + (0x00<<1));
	
	// enter read dev_ID mode
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0xAA;
	*(volatile unsigned short *)(base_addr + (0x2AA<<1)) = 0x55;
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0x90;
	
	// read dev_ID 
	id_dev = *(volatile unsigned short *)(base_addr + (0x01<<1));
	id_ade = AM29LV160DB_ADE_ID;
	OS_EXIT_CRITICAL();
}

/*********************************************************************************************
* name:		FlashEraseSector_AM29LV160DB
* func:		erase flash sector
* para:		unsigned int base_addr  --  base_addr of flash  AM29LV160DB
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
static void FlashEraseSector_AM29LV160DB(unsigned int base_addr)
{
    #if OS_CRITICAL_METHOD == 3
        OS_CPU_SR  cpu_sr;
    #endif
	unsigned int i, sector_addr;

 	sector_addr = (base_addr & AM29LV160DB_FLASH_MASK);
	sector_addr >>= 1;
	sector_addr <<= 1;
	base_addr &= ~AM29LV160DB_FLASH_MASK;

	OS_ENTER_CRITICAL();
	
	// enter erase sector mode 
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0xAA;
	*(volatile unsigned short *)(base_addr + (0x2AA<<1)) = 0x55;
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0x80;
	*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0xAA;
	*(volatile unsigned short *)(base_addr + (0x2AA<<1)) = 0x55;
	*(volatile unsigned short *)(base_addr + (sector_addr)) = 0x30;
	
	// delay about 700 ms 
	for(i=0; i<10000; i++)
		Flash_Delay();
	OS_EXIT_CRITICAL();
}

/*********************************************************************************************
* name:		FlashProgram_AM29LV160DB
* func:		program  flash
* para:		unsigned int base_addr      --  base_addr of flash AM29LV160DB
*           unsigned short *data_addr   --  address of data to be programmed
*           unsigned int bytes          --  bytes of data to be programmed 
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
static void FlashProgram_AM29LV160DB(unsigned int base_addr, unsigned short *data_addr, unsigned int bytes)
{
    #if OS_CRITICAL_METHOD == 3
        OS_CPU_SR  cpu_sr;
    #endif
	unsigned int i, word_addr;

 	word_addr = (base_addr & AM29LV160DB_FLASH_MASK);
	base_addr &= ~AM29LV160DB_FLASH_MASK;

	if(bytes % 2)
		bytes += 1;
	bytes >>= 1;

	// enter programe mode 
	for(i=0; i<bytes; i++)
	{
		OS_ENTER_CRITICAL();
		*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0xAA;
		*(volatile unsigned short *)(base_addr + (0x2AA<<1)) = 0x55;
		*(volatile unsigned short *)(base_addr + (0x555<<1)) = 0xA0;		
		*(volatile unsigned short *)(base_addr + (word_addr)) = data_addr[i];
		
		// delay 50 us 
		Flash_Delay();
		word_addr += sizeof(unsigned short);
		OS_EXIT_CRITICAL();
	}
}


/*********************************************************************************************
* name:		FlashSectorSize_AM29LV160DB
* func:		get flash sector size of AM29LV160DB
* para:		unsigned int base_addr      --  base_addr of flash AM29LV160DB
* ret:		sector size of AM29LV160DB(unsigned int)
* modify:
* comment:		
*********************************************************************************************/
static unsigned int FlashSectorSize_AM29LV160DB(unsigned int base_addr)
{
	unsigned int sector_addr = (base_addr & AM29LV160DB_FLASH_MASK);

	if(sector_addr >= 0x00 && sector_addr < 0x4000)
		return (16*1024);
	else if(sector_addr >= 0x4000 && sector_addr < 0x6000)
		return (8*1024);
	else if(sector_addr >= 0x6000 && sector_addr < 0x8000)
		return (8*1024);
	else if(sector_addr >= 0x8000 && sector_addr < 0x10000)
		return (32*1024);
	else if(sector_addr >= 0x10000 && sector_addr < 0x200000)
		return (64*1024);
	else
		return 0;
}


/*********************************************************************************************
* name:		FlashID
* func:		read  flash id success or not
* para:		unsigned int base_addr      --  base_addr of flash
* ret:		1: read success;  0: read fail
* modify:
* comment:		
*********************************************************************************************/
int FlashID(unsigned int base_addr)
{
	// read AT49BV1614A flash ID 
	FlashID_AT49BV1614A(base_addr);

	if(	id_man == AT49BV1614A_MAN_ID &&
		id_dev == AT49BV1614A_DEV_ID &&
		id_ade == AT49BV1614A_ADE_ID )
	{
		return 1;
	}

	// read AM29LV160B/DB flash ID 
	FlashID_AM29LV160DB(base_addr);
	if(	id_man == AM29LV160DB_MAN_ID &&
		id_dev == AM29LV160DB_DEV_ID &&
		id_ade == AM29LV160DB_ADE_ID )
	{
		return 1;
	}

	return 0;
}


/*********************************************************************************************
* name:		FlashEraseSector
* func:		erase  flash sectors
* para:		unsigned int base_addr      --  base_addr of flash
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void FlashEraseSector(unsigned int base_addr)
{
	// AT49BV1614A 
	if(	id_man == AT49BV1614A_MAN_ID &&
		id_dev == AT49BV1614A_DEV_ID &&
		id_ade == AT49BV1614A_ADE_ID )
	{
		FlashEraseSector_AT49BV1614A(base_addr);
	}

	// AM29LV160B/DB 
	else if(id_man == AM29LV160DB_MAN_ID &&
		id_dev == AM29LV160DB_DEV_ID &&
		id_ade == AM29LV160DB_ADE_ID )
	{
		FlashEraseSector_AM29LV160DB(base_addr);
	}
}


/*********************************************************************************************
* name:		FlashProgram
* func:		program  flash
* para:		unsigned int base_addr      --  base_addr of flash
*           unsigned short *data_addr   --  address of data to be programmed
*           unsigned int bytes          --  bytes of data to be programmed 
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void FlashProgram(unsigned int base_addr, unsigned short *data_addr, unsigned int bytes)
{
	// AT49BV1614A 
	if(	id_man == AT49BV1614A_MAN_ID &&
		id_dev == AT49BV1614A_DEV_ID &&
		id_ade == AT49BV1614A_ADE_ID )
	{
		FlashProgram_AT49BV1614A(base_addr, data_addr, bytes);
	}

	// AM29LV160B/DB 
	else if(id_man == AM29LV160DB_MAN_ID &&
		id_dev == AM29LV160DB_DEV_ID &&
		id_ade == AM29LV160DB_ADE_ID )
	{
		FlashProgram_AM29LV160DB(base_addr, data_addr, bytes);
	}
}


/*********************************************************************************************
* name:		FlashSectorSize
* func:		get  size of flash's sector
* para:		unsigned int base_addr      --  base_addr of flash
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
unsigned int FlashSectorSize(unsigned int base_addr)
{
	unsigned int size = 0;
	
	// AT49BV1614A 
	if(	id_man == AT49BV1614A_MAN_ID &&
		id_dev == AT49BV1614A_DEV_ID &&
		id_ade == AT49BV1614A_ADE_ID )
	{
		size = FlashSectorSize_AT49BV1614A(base_addr);
	}

	// AM29LV160B/DB 
	else if(id_man == AM29LV160DB_MAN_ID &&
		id_dev == AM29LV160DB_DEV_ID &&
		id_ade == AM29LV160DB_ADE_ID )
	{
		size = FlashSectorSize_AM29LV160DB(base_addr);
	}

	return size;
}


/*********************************************************************************************
* name:		FlashSectorBackup
* func:		backup data on flash's sector
* para:		unsigned int base_addr      --  base_addr of flash
*           unsigned char *buf          --  buf to backup data on flash's sector
* ret:		size of data  backuped & return the data's address by pointer buf
* modify:
* comment:		
*********************************************************************************************/
unsigned int FlashSectorBackup(unsigned int base_addr, unsigned char *buf)
{
	unsigned int size;

	size = FlashSectorSize(base_addr);

	if(size > 0)
	{
		unsigned int i;
		unsigned char *ptr;

		ptr = (unsigned char *)(base_addr & (0 - size));
		for(i=0; i<size; i++)
			buf[i] = *ptr++;
	}

	return size;
}