/* * YAFFS: Yet another FFS. A NAND-flash specific file system.  * mkyaffs.c Format a chunk of NAND for YAFFS. * * Copyright (C) 2002 Aleph One Ltd. *   for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * *  Acknowledgement: *  This file is crafted from nandtest.c by  Miguel Freitas (miguel@cetuc.puc-rio.br) *  and Steven J. Hill (sjhill@cotw.com) * * Overview: * Formatting a YAFFS device is very simple. Just erase all undamaged blocks.  * NB Don't erase blocks maked as damaged. */#define _GNU_SOURCE#include <ctype.h>#include <fcntl.h>#include <stdio.h>#include <stdlib.h>#include <time.h>#include <unistd.h>#include <sys/stat.h>#include <sys/ioctl.h>#include <sys/types.h>#include <asm/types.h>#include <linux/config.h>#include <linux/mtd/mtd.h>const char *mkyaffs_c_version = "$Id: mkyaffs.c,v 1.8 2003/03/12 19:54:07 charles Exp $";// countBits is a quick way of counting the number of bits in a byte.// ie. countBits[n] holds the number of 1 bits in a byte with the value n.static const char countBits[256] ={0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8};/* * Buffer arrays used for running tests */unsigned char oobbuf[16];unsigned char imgpage[528];/* * OOB layout */struct nand_oobinfo yaffs_oobinfo = {	useecc: 1,	eccpos: {8, 9, 10, 13, 14, 15}};struct nand_oobinfo yaffs_noeccinfo = {	useecc: 0,};/* * Main program */int main(int argc, char **argv){	unsigned long addr;	unsigned long offset;	int fd;	int img=-1;	int optcnt = 1;	int usemtdecc = 0;	int imglen = 0;	int showHelp = 0;	struct mtd_oob_buf oob = {0, 16, (unsigned char *) &oobbuf};	mtd_info_t meminfo;	erase_info_t erase;	struct nand_oobinfo oobsel;	if (argc > 1 && strcmp (argv[optcnt], "-?") == 0) {		showHelp = 1;	}	if (argc > 1 && strcmp (argv[optcnt], "-h") == 0) {		showHelp = 1;	}		if (argc > 1 && strcmp (argv[optcnt], "-e") == 0) {		optcnt++;		usemtdecc = 1;	}		printf("argc %d sh %d optcnt %d\n",argc, showHelp, optcnt);		/* Make sure a device was specified */	if(showHelp || argc < (optcnt + 1)) {		printf("usage: %s [-e] <mtdname> [image name]\n", argv[0]);		printf("  -e         Use mtd ecc. Default: do not use mtd ecc\n");		printf("  mtdname    Name of mtd device\n");		printf("  image name Name of optional image file\n\n");		printf("Function: Formats a NAND mtd device for YAFFS. If the optional\n"		       "image file is specified, then the file system is loaded with\n"		       "this image.\n\n");		exit(1);	}	if( argc > (optcnt + 1) &&	    (img = open(argv[optcnt + 1],O_RDONLY)) == -1) {		perror("opening image file");		exit(1);	}		if(img >= 0){	   imglen = lseek(img,0,SEEK_END);	   if(imglen %528){	   	printf("Image not a multiple of 528 bytes\n");	   	exit(1);	   }	}		lseek(img,0,SEEK_SET);	/* Open the device */	if((fd = open(argv[optcnt], O_RDWR)) == -1) {		perror("opening flash");		exit(1);	}	/* Fill in MTD device capability structure */	if(ioctl(fd, MEMGETINFO, &meminfo) != 0) {		perror("MEMGETINFO");		close(fd);		exit(1);	}	// set the appropriate oob layout selector	oobsel = usemtdecc ? yaffs_oobinfo : yaffs_noeccinfo;	if (ioctl (fd, MEMSETOOBSEL, &oobsel) != 0) {		perror ("MEMSETOOBSEL");		close (fd);		exit (1);	} 	/* Make sure device page sizes are valid */	if( !(meminfo.oobsize == 16 && meminfo.oobblock == 512)) 	{		printf("Unknown flash (not normal NAND)\n");		close(fd);		exit(1);	}		if(imglen >= 0 &&	   (imglen/528 +32)*512 > meminfo.size){		printf("Image is too big for NAND\n");		exit(1);	}			printf("Erasing and programming NAND\n");	for(addr = 0; addr < meminfo.size; addr += meminfo.erasesize)	{		/* Read the OOB data to determine if the block is valid.		 * If the block is damaged, then byte 5 of the OOB data will		 * have at least 2 zero bits.		 */		oob.start = addr;		oob.length = 16;		oob.ptr = oobbuf;		if (ioctl(fd, MEMREADOOB, &oob) != 0) 		{			perror("ioctl(MEMREADOOB)");			close(fd);			exit(1);		}				if(countBits[oobbuf[5]] < 7)		{			printf("Block at 0x08%lx is damaged and is not being formatted\n",addr);		}		else		{			/* Erase this block */			erase.start = addr;			erase.length = meminfo.erasesize;			printf("Erasing block at 0x08%lx\n",addr);			if(ioctl(fd, MEMERASE, &erase) != 0) 			{				perror("\nMTD Erase failure\n");				close(fd);				exit(1);			}						/* Do some programming, but not in the first block */						if(addr){				for(offset = 0; offset <meminfo.erasesize; offset+=512)				{					if(read(img,imgpage,528) == 528){						if (usemtdecc) {							imgpage[512+8] = 0xff;							imgpage[512+9] = 0xff;							imgpage[512+10] = 0xff;							imgpage[512+13] = 0xff;							imgpage[512+14] = 0xff;							imgpage[512+15] = 0xff;						}						oob.start = addr+offset;						oob.length=16;						oob.ptr=&imgpage[512];						ioctl(fd,MEMWRITEOOB,&oob);						lseek(fd,addr+offset,SEEK_SET);						write(fd,imgpage,512);					}				}			}					}	}	/* All the tests succeeded */	printf("OK\n");	close(fd);	return 0;}