utils/mkyaffs.c

   1 /*
   2  * YAFFS: Yet another FFS. A NAND-flash specific file system.
   3  * mkyaffs.c Format a chunk of NAND for YAFFS.
   4  *
   5  * Copyright (C) 2002 Aleph One Ltd.
   6  *   for Toby Churchill Ltd and Brightstar Engineering
   7  *
   8  * Created by Charles Manning <charles@aleph1.co.uk>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  *  Acknowledgement:
  15  *  This file is crafted from nandtest.c by  Miguel Freitas (miguel@cetuc.puc-rio.br)
  16  *  and Steven J. Hill (sjhill@cotw.com)
  17  *
  18  * Overview:
  19  * Formatting a YAFFS device is very simple. Just erase all undamaged blocks.
  20  * NB Don't erase blocks maked as damaged.
  21  */
  22
  23 #define _GNU_SOURCE
  24 #include <ctype.h>
  25 #include <fcntl.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <time.h>
  29 #include <unistd.h>
  30 #include <sys/stat.h>
  31 #include <sys/ioctl.h>
  32 #include <sys/types.h>
  33 #include <asm/types.h>
  34 #include <linux/config.h>
  35 #include <linux/mtd/mtd.h>
  36
  37 const char *mkyaffs_c_version = "$Id: mkyaffs.c,v 1.8 2003-03-12 19:54:07 charles Exp $";
  38
  39 // countBits is a quick way of counting the number of bits in a byte.
  40 // ie. countBits[n] holds the number of 1 bits in a byte with the value n.
  41
  42 static const char countBits[256] =
  43 {
  44 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,
  45 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
  46 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
  47 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
  48 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
  49 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
  50 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
  51 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
  52 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
  53 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
  54 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
  55 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
  56 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
  57 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
  58 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
  59 4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8
  60 };
  61
  62 /*
  63  * Buffer arrays used for running tests
  64  */
  65
  66 unsigned char oobbuf[16];
  67 unsigned char imgpage[528];
  68
  69 /*
  70  * OOB layout
  71  */
  72
  73 struct nand_oobinfo yaffs_oobinfo = {
  74         useecc: 1,
  75         eccpos: {8, 9, 10, 13, 14, 15}
  76 };
  77
  78 struct nand_oobinfo yaffs_noeccinfo = {
  79         useecc: 0,
  80 };
  81
  82
  83 /*
  84  * Main program
  85  */
  86 int main(int argc, char **argv)
  87 {
  88         unsigned long addr;
  89         unsigned long offset;
  90         int fd;
  91         int img=-1;
  92         int optcnt = 1;
  93         int usemtdecc = 0;
  94         int imglen = 0;
  95         int showHelp = 0;
  96         struct mtd_oob_buf oob = {0, 16, (unsigned char *) &oobbuf};
  97         mtd_info_t meminfo;
  98         erase_info_t erase;
  99         struct nand_oobinfo oobsel;
 100
 101         if (argc > 1 && strcmp (argv[optcnt], "-?") == 0) {
 102                 showHelp = 1;
 103         }
 104
 105         if (argc > 1 && strcmp (argv[optcnt], "-h") == 0) {
 106                 showHelp = 1;
 107         }
 108
 109         if (argc > 1 && strcmp (argv[optcnt], "-e") == 0) {
 110                 optcnt++;
 111                 usemtdecc = 1;
 112         }
 113
 114         printf("argc %d sh %d optcnt %d\n",argc, showHelp, optcnt);
 115
 116         /* Make sure a device was specified */
 117         if(showHelp || argc < (optcnt + 1)) {
 118                 printf("usage: %s [-e] <mtdname> [image name]\n", argv[0]);
 119                 printf("  -e         Use mtd ecc. Default: do not use mtd ecc\n");
 120                 printf("  mtdname    Name of mtd device\n");
 121                 printf("  image name Name of optional image file\n\n");
 122                 printf("Function: Formats a NAND mtd device for YAFFS. If the optional\n"
 123                        "image file is specified, then the file system is loaded with\n"
 124                        "this image.\n\n");
 125                 exit(1);
 126         }
 127
 128         if( argc > (optcnt + 1) &&
 129             (img = open(argv[optcnt + 1],O_RDONLY)) == -1) {
 130                 perror("opening image file");
 131                 exit(1);
 132         }
 133
 134         if(img >= 0){
 135            imglen = lseek(img,0,SEEK_END);
 136            if(imglen %528){
 137                 printf("Image not a multiple of 528 bytes\n");
 138                 exit(1);
 139            }
 140         }
 141
 142         lseek(img,0,SEEK_SET);
 143
 144         /* Open the device */
 145         if((fd = open(argv[optcnt], O_RDWR)) == -1) {
 146                 perror("opening flash");
 147                 exit(1);
 148         }
 149
 150         /* Fill in MTD device capability structure */
 151         if(ioctl(fd, MEMGETINFO, &meminfo) != 0) {
 152                 perror("MEMGETINFO");
 153                 close(fd);
 154                 exit(1);
 155         }
 156
 157         // set the appropriate oob layout selector
 158         oobsel = usemtdecc ? yaffs_oobinfo : yaffs_noeccinfo;
 159         if (ioctl (fd, MEMSETOOBSEL, &oobsel) != 0) {
 160                 perror ("MEMSETOOBSEL");
 161                 close (fd);
 162                 exit (1);
 163         }
 164
 165         /* Make sure device page sizes are valid */
 166         if( !(meminfo.oobsize == 16 && meminfo.oobblock == 512))
 167         {
 168                 printf("Unknown flash (not normal NAND)\n");
 169                 close(fd);
 170                 exit(1);
 171         }
 172
 173         if(imglen >= 0 &&
 174            (imglen/528 +32)*512 > meminfo.size){
 175                 printf("Image is too big for NAND\n");
 176                 exit(1);
 177         }
 178
 179
 180         printf("Erasing and programming NAND\n");
 181         for(addr = 0; addr < meminfo.size; addr += meminfo.erasesize)
 182         {
 183                 /* Read the OOB data to determine if the block is valid.
 184                  * If the block is damaged, then byte 5 of the OOB data will
 185                  * have at least 2 zero bits.
 186                  */
 187                 oob.start = addr;
 188                 oob.length = 16;
 189                 oob.ptr = oobbuf;
 190                 if (ioctl(fd, MEMREADOOB, &oob) != 0)
 191                 {
 192                         perror("ioctl(MEMREADOOB)");
 193                         close(fd);
 194                         exit(1);
 195                 }
 196
 197                 if(countBits[oobbuf[5]] < 7)
 198                 {
 199                         printf("Block at 0x08%lx is damaged and is not being formatted\n",addr);
 200                 }
 201                 else
 202                 {
 203                         /* Erase this block */
 204                         erase.start = addr;
 205                         erase.length = meminfo.erasesize;
 206                         printf("Erasing block at 0x08%lx\n",addr);
 207                         if(ioctl(fd, MEMERASE, &erase) != 0)
 208                         {
 209                                 perror("\nMTD Erase failure\n");
 210                                 close(fd);
 211                                 exit(1);
 212                         }
 213
 214                         /* Do some programming, but not in the first block */
 215
 216                         if(addr){
 217                                 for(offset = 0; offset <meminfo.erasesize; offset+=512)
 218                                 {
 219                                         if(read(img,imgpage,528) == 528){
 220                                                 if (usemtdecc) {
 221                                                         imgpage[512+8] = 0xff;
 222                                                         imgpage[512+9] = 0xff;
 223                                                         imgpage[512+10] = 0xff;
 224                                                         imgpage[512+13] = 0xff;
 225                                                         imgpage[512+14] = 0xff;
 226                                                         imgpage[512+15] = 0xff;
 227                                                 }
 228                                                 oob.start = addr+offset;
 229                                                 oob.length=16;
 230                                                 oob.ptr=&imgpage[512];
 231                                                 ioctl(fd,MEMWRITEOOB,&oob);
 232
 233                                                 lseek(fd,addr+offset,SEEK_SET);
 234                                                 write(fd,imgpage,512);
 235                                         }
 236                                 }
 237                         }
 238
 239                 }
 240
 241         }
 242
 243
 244
 245         /* All the tests succeeded */
 246         printf("OK\n");
 247         close(fd);
 248         return 0;
 249 }
 250