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Diffstat (limited to 'package/nand/src/nanddump.c')
-rw-r--r-- | package/nand/src/nanddump.c | 421 |
1 files changed, 421 insertions, 0 deletions
diff --git a/package/nand/src/nanddump.c b/package/nand/src/nanddump.c new file mode 100644 index 000000000..678d6847a --- /dev/null +++ b/package/nand/src/nanddump.c @@ -0,0 +1,421 @@ +/* + * nanddump.c + * + * Copyright (C) 2000 David Woodhouse (dwmw2@infradead.org) + * Steven J. Hill (sjhill@realitydiluted.com) + * + * 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. + * + * Overview: + * This utility dumps the contents of raw NAND chips or NAND + * chips contained in DoC devices. + */ + +#define _GNU_SOURCE +#include <ctype.h> +#include <errno.h> +#include <fcntl.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <getopt.h> +#include <sys/ioctl.h> +#include <sys/types.h> +#include <sys/stat.h> + +#include <asm/types.h> +#include <mtd/mtd-user.h> + +#define PROGRAM "nanddump" +#define VERSION "$Revision: 1.29 $" + +static struct nand_oobinfo none_oobinfo = { + .useecc = MTD_NANDECC_OFF, +}; + +static void display_help (void) +{ + printf( +"Usage: nanddump [OPTIONS] MTD-device\n" +"Dumps the contents of a nand mtd partition.\n" +"\n" +" --help Display this help and exit\n" +" --version Output version information and exit\n" +"-f file --file=file Dump to file\n" +"-i --ignoreerrors Ignore errors\n" +"-l length --length=length Length\n" +"-n --noecc Read without error correction\n" +"-o --omitoob Omit oob data\n" +"-b --omitbad Omit bad blocks from the dump\n" +"-p --prettyprint Print nice (hexdump)\n" +"-q --quiet Don't display progress and status messages\n" +"-s addr --startaddress=addr Start address\n" + ); + exit(EXIT_SUCCESS); +} + +static void display_version (void) +{ + printf(PROGRAM " " VERSION "\n" + "\n" + PROGRAM " comes with NO WARRANTY\n" + "to the extent permitted by law.\n" + "\n" + "You may redistribute copies of " PROGRAM "\n" + "under the terms of the GNU General Public Licence.\n" + "See the file `COPYING' for more information.\n"); + exit(EXIT_SUCCESS); +} + +// Option variables + +static bool ignoreerrors = false; // ignore errors +static bool pretty_print = false; // print nice in ascii +static bool noecc = false; // don't error correct +static bool omitoob = false; // omit oob data +static unsigned long start_addr; // start address +static unsigned long length; // dump length +static const char *mtddev; // mtd device name +static const char *dumpfile; // dump file name +static bool omitbad = false; +static bool quiet = false; // suppress diagnostic output + +static void process_options (int argc, char * const argv[]) +{ + int error = 0; + + for (;;) { + int option_index = 0; + static const char *short_options = "bs:f:il:opqn"; + static const struct option long_options[] = { + {"help", no_argument, 0, 0}, + {"version", no_argument, 0, 0}, + {"file", required_argument, 0, 'f'}, + {"ignoreerrors", no_argument, 0, 'i'}, + {"prettyprint", no_argument, 0, 'p'}, + {"omitoob", no_argument, 0, 'o'}, + {"omitbad", no_argument, 0, 'b'}, + {"startaddress", required_argument, 0, 's'}, + {"length", required_argument, 0, 'l'}, + {"noecc", no_argument, 0, 'n'}, + {"quiet", no_argument, 0, 'q'}, + {0, 0, 0, 0}, + }; + + int c = getopt_long(argc, argv, short_options, + long_options, &option_index); + if (c == EOF) { + break; + } + + switch (c) { + case 0: + switch (option_index) { + case 0: + display_help(); + break; + case 1: + display_version(); + break; + } + break; + case 'b': + omitbad = true; + break; + case 's': + start_addr = strtol(optarg, NULL, 0); + break; + case 'f': + if (!(dumpfile = strdup(optarg))) { + perror("stddup"); + exit(EXIT_FAILURE); + } + break; + case 'i': + ignoreerrors = true; + break; + case 'l': + length = strtol(optarg, NULL, 0); + break; + case 'o': + omitoob = true; + break; + case 'p': + pretty_print = true; + break; + case 'q': + quiet = true; + break; + case 'n': + noecc = true; + break; + case '?': + error++; + break; + } + } + + if (quiet && pretty_print) { + fprintf(stderr, "The quiet and pretty print options are mutually-\n" + "exclusive. Choose one or the other.\n"); + exit(EXIT_FAILURE); + } + + if ((argc - optind) != 1 || error) + display_help (); + + mtddev = argv[optind]; +} + +/* + * Buffers for reading data from flash + */ +static unsigned char readbuf[4096]; +static unsigned char oobbuf[128]; + +/* + * Main program + */ +int main(int argc, char * const argv[]) +{ + unsigned long ofs, end_addr = 0; + unsigned long long blockstart = 1; + int ret, i, fd, ofd, bs, badblock = 0; + struct mtd_oob_buf oob = {0, 16, oobbuf}; + mtd_info_t meminfo; + char pretty_buf[80]; + int oobinfochanged = 0 ; + struct nand_oobinfo old_oobinfo; + struct mtd_ecc_stats stat1, stat2; + bool eccstats = false; + + process_options(argc, argv); + + /* Open MTD device */ + if ((fd = open(mtddev, O_RDONLY)) == -1) { + perror(mtddev); + exit (EXIT_FAILURE); + } + + /* Fill in MTD device capability structure */ + if (ioctl(fd, MEMGETINFO, &meminfo) != 0) { + perror("MEMGETINFO"); + close(fd); + exit (EXIT_FAILURE); + } + + /* Make sure device page sizes are valid */ + if (!(meminfo.oobsize == 128 && meminfo.writesize == 4096) && + !(meminfo.oobsize == 64 && meminfo.writesize == 2048) && + !(meminfo.oobsize == 32 && meminfo.writesize == 1024) && + !(meminfo.oobsize == 16 && meminfo.writesize == 512) && + !(meminfo.oobsize == 8 && meminfo.writesize == 256)) { + fprintf(stderr, "Unknown flash (not normal NAND)\n"); + close(fd); + exit(EXIT_FAILURE); + } + /* Read the real oob length */ + oob.length = meminfo.oobsize; + + if (noecc) { + ret = ioctl(fd, MTDFILEMODE, (void *) MTD_MODE_RAW); + if (ret == 0) { + oobinfochanged = 2; + } else { + switch (errno) { + case ENOTTY: + if (ioctl (fd, MEMGETOOBSEL, &old_oobinfo) != 0) { + perror ("MEMGETOOBSEL"); + close (fd); + exit (EXIT_FAILURE); + } + if (ioctl (fd, MEMSETOOBSEL, &none_oobinfo) != 0) { + perror ("MEMSETOOBSEL"); + close (fd); + exit (EXIT_FAILURE); + } + oobinfochanged = 1; + break; + default: + perror ("MTDFILEMODE"); + close (fd); + exit (EXIT_FAILURE); + } + } + } else { + + /* check if we can read ecc stats */ + if (!ioctl(fd, ECCGETSTATS, &stat1)) { + eccstats = true; + if (!quiet) { + fprintf(stderr, "ECC failed: %d\n", stat1.failed); + fprintf(stderr, "ECC corrected: %d\n", stat1.corrected); + fprintf(stderr, "Number of bad blocks: %d\n", stat1.badblocks); + fprintf(stderr, "Number of bbt blocks: %d\n", stat1.bbtblocks); + } + } else + perror("No ECC status information available"); + } + + /* Open output file for writing. If file name is "-", write to standard + * output. */ + if (!dumpfile) { + ofd = STDOUT_FILENO; + } else if ((ofd = open(dumpfile, O_WRONLY | O_TRUNC | O_CREAT, 0644))== -1) { + perror (dumpfile); + close(fd); + exit(EXIT_FAILURE); + } + + /* Initialize start/end addresses and block size */ + if (length) + end_addr = start_addr + length; + if (!length || end_addr > meminfo.size) + end_addr = meminfo.size; + + bs = meminfo.writesize; + + /* Print informative message */ + + if (!quiet) { + fprintf(stderr, "Block size %u, page size %u, OOB size %u\n", + meminfo.erasesize, meminfo.writesize, meminfo.oobsize); + fprintf(stderr, + "Dumping data starting at 0x%08x and ending at 0x%08x...\n", + (unsigned int) start_addr, (unsigned int) end_addr); + } + /* Dump the flash contents */ + for (ofs = start_addr; ofs < end_addr ; ofs+=bs) { + + // new eraseblock , check for bad block + if (blockstart != (ofs & (~meminfo.erasesize + 1))) { + blockstart = ofs & (~meminfo.erasesize + 1); + if ((badblock = ioctl(fd, MEMGETBADBLOCK, &blockstart)) < 0) { + perror("ioctl(MEMGETBADBLOCK)"); + goto closeall; + } + } + + if (badblock) { + if (omitbad) + continue; + memset (readbuf, 0xff, bs); + } else { + /* Read page data and exit on failure */ + if (pread(fd, readbuf, bs, ofs) != bs) { + perror("pread"); + goto closeall; + } + } + + /* ECC stats available ? */ + if (eccstats) { + if (ioctl(fd, ECCGETSTATS, &stat2)) { + perror("ioctl(ECCGETSTATS)"); + goto closeall; + } + if (stat1.failed != stat2.failed) + fprintf(stderr, "ECC: %d uncorrectable bitflip(s)" + " at offset 0x%08lx\n", + stat2.failed - stat1.failed, ofs); + if (stat1.corrected != stat2.corrected) + fprintf(stderr, "ECC: %d corrected bitflip(s) at" + " offset 0x%08lx\n", + stat2.corrected - stat1.corrected, ofs); + stat1 = stat2; + } + + /* Write out page data */ + if (pretty_print) { + for (i = 0; i < bs; i += 16) { + sprintf(pretty_buf, + "0x%08x: %02x %02x %02x %02x %02x %02x %02x " + "%02x %02x %02x %02x %02x %02x %02x %02x %02x\n", + (unsigned int) (ofs + i), readbuf[i], + readbuf[i+1], readbuf[i+2], + readbuf[i+3], readbuf[i+4], + readbuf[i+5], readbuf[i+6], + readbuf[i+7], readbuf[i+8], + readbuf[i+9], readbuf[i+10], + readbuf[i+11], readbuf[i+12], + readbuf[i+13], readbuf[i+14], + readbuf[i+15]); + write(ofd, pretty_buf, 60); + } + } else + write(ofd, readbuf, bs); + + + + if (omitoob) + continue; + + if (badblock) { + memset (readbuf, 0xff, meminfo.oobsize); + } else { + /* Read OOB data and exit on failure */ + oob.start = ofs; + if (ioctl(fd, MEMREADOOB, &oob) != 0) { + perror("ioctl(MEMREADOOB)"); + goto closeall; + } + } + + /* Write out OOB data */ + if (pretty_print) { + if (meminfo.oobsize < 16) { + sprintf(pretty_buf, " OOB Data: %02x %02x %02x %02x %02x %02x " + "%02x %02x\n", + oobbuf[0], oobbuf[1], oobbuf[2], + oobbuf[3], oobbuf[4], oobbuf[5], + oobbuf[6], oobbuf[7]); + write(ofd, pretty_buf, 48); + continue; + } + + for (i = 0; i < meminfo.oobsize; i += 16) { + sprintf(pretty_buf, " OOB Data: %02x %02x %02x %02x %02x %02x " + "%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", + oobbuf[i], oobbuf[i+1], oobbuf[i+2], + oobbuf[i+3], oobbuf[i+4], oobbuf[i+5], + oobbuf[i+6], oobbuf[i+7], oobbuf[i+8], + oobbuf[i+9], oobbuf[i+10], oobbuf[i+11], + oobbuf[i+12], oobbuf[i+13], oobbuf[i+14], + oobbuf[i+15]); + write(ofd, pretty_buf, 60); + } + } else + write(ofd, oobbuf, meminfo.oobsize); + } + + /* reset oobinfo */ + if (oobinfochanged == 1) { + if (ioctl (fd, MEMSETOOBSEL, &old_oobinfo) != 0) { + perror ("MEMSETOOBSEL"); + close(fd); + close(ofd); + return EXIT_FAILURE; + } + } + /* Close the output file and MTD device */ + close(fd); + close(ofd); + + /* Exit happy */ + return EXIT_SUCCESS; + +closeall: + /* The new mode change is per file descriptor ! */ + if (oobinfochanged == 1) { + if (ioctl (fd, MEMSETOOBSEL, &old_oobinfo) != 0) { + perror ("MEMSETOOBSEL"); + } + } + close(fd); + close(ofd); + exit(EXIT_FAILURE); +} |