yaffscfg.c

USB_ON_s3c2410 USB_ON_s3c2410

/*
 * YAFFS: Yet another FFS. A NAND-flash specific file system.
 * yaffscfg.c  The configuration for the "direct" use of yaffs.
 *
 * This file is intended to be modified to your requirements.
 * There is no need to redistribute this file.
 */

#include "yaffscfg.h"
#include "yaffsfs.h"
#include <errno.h>

unsigned yaffs_traceMask = 0xFFFFFFFF;


void yaffsfs_SetError(int err)
{
	//Do whatever to set error
	errno = err;
	if (err)
	{
		T(YAFFS_TRACE_ERROR,("--->YAFFS set ERROR %d\n",err));
	}
}

void yaffsfs_Lock(void)
{
}

void yaffsfs_Unlock(void)
{
}

__u32 yaffsfs_CurrentTime(void)
{
	return 0;
}

void yaffsfs_LocalInitialisation(void)
{
	// Define locking semaphore.
}

// 
#ifdef ADSARM
#include "k9s1208_fif.h"
#else
#include "yaffs_flashif.h"
#endif

static yaffs_Device bootDev;
static yaffs_Device dataDev;

static yaffsfs_DeviceConfiguration yaffsfs_config[] = {
	{"/boot",&bootDev},   //2MB的启动代码
	{ "/data", &dataDev}, //62MB的数据
	{(void *)0,(void *)0}
};


int yaffs_StartUp(void)
{
	// Stuff to configure YAFFS
	// Stuff to initialise anything special (eg lock semaphore).
	yaffsfs_LocalInitialisation();
	
	// Set up devices

	// /boot //启动代码区
	bootDev.nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
	bootDev.nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
	bootDev.nReservedBlocks = 5;
	bootDev.startBlock = 32; // Can't use block 0
	bootDev.endBlock = 127; // Last block in 2MB.	
	bootDev.useNANDECC = 0; // use YAFFS's ECC
	bootDev.nShortOpCaches = 0; //donnot Use caches
	bootDev.genericDevice = (void *) 1;	// Used to identify the device in fstat.
	bootDev.writeChunkToNAND = k9_WriteChunkToNAND;
	bootDev.readChunkFromNAND = k9_ReadChunkFromNAND;
	bootDev.eraseBlockInNAND = k9_EraseBlockInNAND;
	bootDev.initialiseNAND = k9_InitialiseNAND;

	// /data  //数据区
	dataDev.nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
	dataDev.nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
	dataDev.nReservedBlocks = 5;
	dataDev.startBlock = 128; // First block after 2MB
	dataDev.endBlock = 4095; // Last block in 64MB
	dataDev.useNANDECC = 0; // use YAFFS's ECC
	dataDev.nShortOpCaches = 0; //donnot Use caches
	dataDev.genericDevice = (void *) 2;	// Used to identify the device in fstat.
	dataDev.writeChunkToNAND = k9_WriteChunkToNAND;
	dataDev.readChunkFromNAND = k9_ReadChunkFromNAND;
	dataDev.eraseBlockInNAND = k9_EraseBlockInNAND;
	dataDev.initialiseNAND = k9_InitialiseNAND;

	yaffs_initialise(yaffsfs_config);
	
	return 0;
}