dataflash.c

基于AT91SAM9260的bootloader

//*----------------------------------------------------------------------------
//*         ATMEL Microcontroller Software Support  -  ROUSSET  -
//*----------------------------------------------------------------------------
//* The software is delivered "AS IS" without warranty or condition of any
//* kind, either express, implied or statutory. This includes without
//* limitation any warranty or condition with respect to merchantability or
//* fitness for any particular purpose, or against the infringements of
//* intellectual property rights of others.
//*----------------------------------------------------------------------------
//* File Name           : dataflash.c
//* Object              : High level functions for the dataflash
//* Creation            : HIi   10/10/2003
//*----------------------------------------------------------------------------

#include <stdio.h> 
#include <string.h> 
#include "dataflash.h"


AT91S_DATAFLASH_INFO dataflash_info[CFG_MAX_DATAFLASH_BANKS];
static AT91S_DataFlash DataFlashInst;
/*
int cs[][CFG_MAX_DATAFLASH_BANKS] = {
	{CFG_DATAFLASH_LOGIC_ADDR_CS0, 0},	// Logical adress, CS 
	{CFG_DATAFLASH_LOGIC_ADDR_CS3, 3}
};
*/

int cs[CFG_MAX_DATAFLASH_BANKS][2] = {
	{CFG_DATAFLASH_LOGIC_ADDR_CS0, 1}
};


int AT91F_DataflashInit (void)
{
	int i;
	int dfcode;
	int Nb_device = 0;
		
	AT91F_SpiInit ();
	
	for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
		dataflash_info[i].Desc.state = IDLE;
		dataflash_info[i].id = 0;
		dataflash_info[i].Device.pages_number = 0;
		dfcode = AT91F_DataflashProbe (cs[i][1], &dataflash_info[i].Desc);

		switch (dfcode) {
		case AT45DB161:
			dataflash_info[i].Device.pages_number = 4096;
			dataflash_info[i].Device.pages_size = 528;
			dataflash_info[i].Device.page_offset = 10;
			dataflash_info[i].Device.byte_mask = 0x300;
			dataflash_info[i].Device.cs = cs[i][1];
			dataflash_info[i].Desc.DataFlash_state = IDLE;
			dataflash_info[i].logical_address = cs[i][0];
			dataflash_info[i].id = dfcode;
			Nb_device++;
			break;

		case AT45DB321:
			dataflash_info[i].Device.pages_number = 8192;
			dataflash_info[i].Device.pages_size = 528;
			dataflash_info[i].Device.page_offset = 10;
			dataflash_info[i].Device.byte_mask = 0x300;
			dataflash_info[i].Device.cs = cs[i][1];
			dataflash_info[i].Desc.DataFlash_state = IDLE;
			dataflash_info[i].logical_address = cs[i][0];
			dataflash_info[i].id = dfcode;
			Nb_device++;
			break;

		case AT45DB642:
			dataflash_info[i].Device.pages_number = 8192;
			dataflash_info[i].Device.pages_size = 1056;
			dataflash_info[i].Device.page_offset = 11;
			dataflash_info[i].Device.byte_mask = 0x700;
			dataflash_info[i].Device.cs = cs[i][1];
			dataflash_info[i].Desc.DataFlash_state = IDLE;
			dataflash_info[i].logical_address = cs[i][0];
			dataflash_info[i].id = dfcode;
			Nb_device++;
			break;
		case AT45DB128:
			dataflash_info[i].Device.pages_number = 16384;
			dataflash_info[i].Device.pages_size = 1056;
			dataflash_info[i].Device.page_offset = 11;
			dataflash_info[i].Device.byte_mask = 0x700;
			dataflash_info[i].Device.cs = cs[i][1];
			dataflash_info[i].Desc.DataFlash_state = IDLE;
			dataflash_info[i].logical_address = cs[i][0];
			dataflash_info[i].id = dfcode;
			Nb_device++;
			break;
		default:
			break;
		}
	}
			
	return (Nb_device);
}


void AT91F_DataflashPrintInfo(void)
{
	int i;

	for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
		if (dataflash_info[i].id != 0) {
			printf ("DataFlash[%dMhz]:", AT91C_DATAFLASH_CLK/1000000);
			switch (dataflash_info[i].id) {
			case AT45DB161:
				printf ("AT45DB161\n\r");
				break;

			case AT45DB321:
				printf ("AT45DB321\n\r");
				break;

			case AT45DB642:
				printf ("AT45DB642\n\r");
				break;
			case AT45DB128:				
				printf ("AT45DB128\n\r");
				break;
			}

			printf ("Nb pages: %6d\n\r"
				"Page Size: %6d\n\r"
				"Size=%8d bytes\n\r"
				"Logical address: 0x%08X\n\r",
				(unsigned int) dataflash_info[i].Device.pages_number,
				(unsigned int) dataflash_info[i].Device.pages_size,
				(unsigned int) dataflash_info[i].Device.pages_number *
				dataflash_info[i].Device.pages_size,
				(unsigned int) dataflash_info[i].logical_address);
		}
	}
}


/*------------------------------------------------------------------------------*/
/* Function Name       : AT91F_DataflashSelect 					*/
/* Object              : Select the correct device				*/
/*------------------------------------------------------------------------------*/
AT91PS_DataFlash AT91F_DataflashSelect (AT91PS_DataFlash pFlash,
										unsigned int *addr)
{
	char addr_valid = 0;
	int i;

	for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++)
		if ((*addr & 0xFF000000) == dataflash_info[i].logical_address) {
			addr_valid = 1;
			break;
		}
	if (!addr_valid) {
		pFlash = (AT91PS_DataFlash) 0;
		return pFlash;
	}
	pFlash->pDataFlashDesc = &(dataflash_info[i].Desc);
	pFlash->pDevice = &(dataflash_info[i].Device);
	*addr -= dataflash_info[i].logical_address;
	return (pFlash);
}


/*------------------------------------------------------------------------------*/
/* Function Name       : addr_dataflash 					*/
/* Object              : Test if address is valid				*/
/*------------------------------------------------------------------------------*/
int addr_dataflash (unsigned long addr)
{
	int addr_valid = 0;
	int i;

	for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
		if ((((int) addr) & 0xFF000000) ==
			dataflash_info[i].logical_address) {
			addr_valid = 1;
			break;
		}
	}

	return addr_valid;
}

/*------------------------------------------------------------------------------*/
/* Function Name       : read_dataflash 					*/
/* Object              : dataflash memory read					*/
/*------------------------------------------------------------------------------*/
int read_dataflash (unsigned long addr, unsigned long size, char *result)
{
	unsigned int AddrToRead = addr;
	AT91PS_DataFlash pFlash = &DataFlashInst;

	pFlash = AT91F_DataflashSelect (pFlash, &AddrToRead);
	if (pFlash == 0)
		return -1;

	return (AT91F_DataFlashRead (pFlash, AddrToRead, size, result));
}


/*-----------------------------------------------------------------------------*/
/* Function Name       : write_dataflash 				       */
/* Object              : write a block in dataflash			       */
/*-----------------------------------------------------------------------------*/
int write_dataflash (unsigned long addr_dest, unsigned int addr_src,
		     unsigned int size)
{
	unsigned int AddrToWrite = addr_dest;
	AT91PS_DataFlash pFlash = &DataFlashInst;

	pFlash = AT91F_DataflashSelect (pFlash, &AddrToWrite);
	if (AddrToWrite == -1)
		return -1;

	return AT91F_DataFlashWrite (pFlash, (unsigned char *) addr_src, AddrToWrite, size);
}