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nanddump: new applet

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function                                             old     new   delta
nandwrite_main                                       418     936    +518
dump_bad                                               -     119    +119
packed_usage                                       27752   27810     +58
next_good_eraseblock                                  84     106     +22
applet_names                                        2366    2375      +9
applet_main                                         1380    1384      +4
applet_nameofs                                       690     692      +2
bbconfig_config_bz2                                 4932    4922     -10
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 6/1 up/down: 732/-10)           Total: 722 bytes

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Baruch Siach 2010-10-18 02:36:34 +02:00 committed by Denys Vlasenko
parent 873bb31d17
commit 36af2f7977
1 changed files with 126 additions and 27 deletions
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153
miscutils/nandwrite.c
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@ -1,5 +1,5 @@
/*
* nandwrite.c - ported to busybox from mtd-utils
* nandwrite and nanddump ported to busybox from mtd-utils
*
* Author: Baruch Siach <baruch@tkos.co.il>, Orex Computed Radiography
*
@ -9,8 +9,10 @@
*/
//applet:IF_NANDWRITE(APPLET(nandwrite, _BB_DIR_USR_SBIN, _BB_SUID_DROP))
//applet:IF_NANDWRITE(APPLET_ODDNAME(nanddump, nandwrite, _BB_DIR_USR_SBIN, _BB_SUID_DROP, nanddump))
//kbuild:lib-$(CONFIG_NANDWRITE) += nandwrite.o
//kbuild:lib-$(CONFIG_NANDDUMP) += nandwrite.o
//config:config NANDWRITE
//config: bool "nandwrite"
@ -18,9 +20,13 @@
//config: depends on PLATFORM_LINUX
//config: help
//config: Write to the specified MTD device, with bad blocks awareness
#include "libbb.h"
#include <mtd/mtd-user.h>
//config:
//config:config NANDDUMP
//config: bool "nanddump"
//config: default n
//config: depends on PLATFORM_LINUX
//config: help
//config: Dump the content of raw NAND chip
//usage:#define nandwrite_trivial_usage
//usage: "[-p] [-s ADDR] MTD_DEVICE [FILE]"
@ -30,18 +36,65 @@
//usage: "\n -p Pad to page size"
//usage: "\n -s ADDR Start address"
//usage:#define nanddump_trivial_usage
//usage: "[-o] [-b] [-s ADDR] [-f FILE] MTD_DEVICE"
//usage:#define nanddump_full_usage "\n\n"
//usage: "Dump the sepcified MTD device\n"
//usage: "\nOptions:"
//usage: "\n -o Omit oob data"
//usage: "\n -b Omit bad block from the dump"
//usage: "\n -s ADDR Start address"
//usage: "\n -l LEN Length"
//usage: "\n -f FILE Dump to file ('-' for stdout)"
#include "libbb.h"
#include <mtd/mtd-user.h>
#define IS_NANDDUMP (ENABLE_NANDDUMP && (!ENABLE_NANDWRITE || (applet_name[4] == 'd')))
#define IS_NANDWRITE (ENABLE_NANDWRITE && (!ENABLE_NANDDUMP || (applet_name[4] != 'd')))
#define OPT_p (1 << 0) /* nandwrite only */
#define OPT_o (1 << 0) /* nanddump only */
#define OPT_s (1 << 1)
#define OPT_b (1 << 2)
#define OPT_f (1 << 3)
#define OPT_l (1 << 4)
#define NAND_MAX_OOBSIZE 256
/* helper for writing out 0xff for bad blocks pad */
static void dump_bad(struct mtd_info_user *meminfo, unsigned len, int oob)
{
unsigned char buf[meminfo->writesize];
unsigned count;
/* round len to the next page */
len = (len | ~(meminfo->writesize - 1)) + 1;
memset(buf, 0xff, sizeof(buf));
for (count = 0; count < len; count += meminfo->writesize) {
xwrite(STDOUT_FILENO, buf, meminfo->writesize);
if (oob)
xwrite(STDOUT_FILENO, buf, meminfo->oobsize);
}
}
static unsigned next_good_eraseblock(int fd, struct mtd_info_user *meminfo,
unsigned block_offset)
{
while (1) {
loff_t offs;
if (block_offset >= meminfo->size)
bb_error_msg_and_die("not enough space in MTD device");
if (block_offset >= meminfo->size) {
if (IS_NANDWRITE)
bb_error_msg_and_die("not enough space in MTD device");
return block_offset; /* let the caller exit */
}
offs = block_offset;
if (xioctl(fd, MEMGETBADBLOCK, &offs) == 0)
return block_offset;
/* ioctl returned 1 => "bad block" */
printf("Skipping bad block at 0x%08x\n", block_offset);
if (IS_NANDWRITE)
printf("Skipping bad block at 0x%08x\n", block_offset);
block_offset += meminfo->erasesize;
}
}
@ -49,31 +102,49 @@ static unsigned next_good_eraseblock(int fd, struct mtd_info_user *meminfo,
int nandwrite_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int nandwrite_main(int argc UNUSED_PARAM, char **argv)
{
/* Buffer for OOB data */
unsigned char oobbuf[NAND_MAX_OOBSIZE];
unsigned opts;
int fd;
ssize_t cnt;
unsigned mtdoffset, meminfo_writesize, blockstart;
unsigned mtdoffset, meminfo_writesize, blockstart, limit;
unsigned end_addr = ~0;
struct mtd_info_user meminfo;
struct mtd_oob_buf oob;
unsigned char *filebuf;
const char *opt_s = "0";
enum {
OPT_p = (1 << 0),
OPT_s = (1 << 1),
};
const char *opt_s = "0", *opt_f = "-", *opt_l;
opt_complementary = "-1:?2";
opts = getopt32(argv, "ps:", &opt_s);
if (IS_NANDDUMP) {
opt_complementary = "=1";
opts = getopt32(argv, "os:bf:l:", &opt_s, &opt_f, &opt_l);
} else { /* nandwrite */
opt_complementary = "-1:?2";
opts = getopt32(argv, "ps:", &opt_s);
}
argv += optind;
if (argv[1])
xmove_fd(xopen_stdin(argv[1]), STDIN_FILENO);
if (IS_NANDWRITE && argv[1])
opt_f = argv[1];
if (!LONE_DASH(opt_f)) {
int tmp_fd = xopen(opt_f,
IS_NANDDUMP ? O_WRONLY | O_TRUNC | O_CREAT : O_RDONLY
);
xmove_fd(tmp_fd, IS_NANDDUMP ? STDOUT_FILENO : STDIN_FILENO);
}
fd = xopen(argv[0], O_RDWR);
xioctl(fd, MEMGETINFO, &meminfo);
mtdoffset = bb_strtou(opt_s, NULL, 0);
if (errno)
bb_error_msg_and_die("invalid number '%s'", opt_s);
oob.start = 0;
oob.length = meminfo.oobsize;
oob.ptr = oobbuf;
mtdoffset = xstrtou(opt_s, 0);
if (IS_NANDDUMP && (opts & OPT_l)) {
unsigned length = xstrtou(opt_l, 0);
if (length < meminfo.size - mtdoffset)
end_addr = mtdoffset + length;
}
/* Pull it into a CPU register (hopefully) - smaller code that way */
meminfo_writesize = meminfo.writesize;
@ -91,20 +162,39 @@ int nandwrite_main(int argc UNUSED_PARAM, char **argv)
* bad.
*/
tmp = next_good_eraseblock(fd, &meminfo, blockstart);
if (tmp != blockstart) /* bad block(s), advance mtdoffset */
if (tmp != blockstart) {
/* bad block(s), advance mtdoffset */
if (IS_NANDDUMP & !(opts & OPT_b)) {
int bad_len = MIN(tmp, end_addr) - mtdoffset;
dump_bad(&meminfo, bad_len, !(opts & OPT_o));
}
mtdoffset = tmp;
}
}
cnt = -1;
while (mtdoffset < meminfo.size) {
limit = MIN(meminfo.size, end_addr);
while (mtdoffset < limit) {
int input_fd = IS_NANDWRITE ? STDIN_FILENO : fd;
int output_fd = IS_NANDWRITE ? fd : STDOUT_FILENO;
blockstart = mtdoffset & ~(meminfo.erasesize - 1);
if (blockstart == mtdoffset) {
/* starting a new eraseblock */
mtdoffset = next_good_eraseblock(fd, &meminfo, blockstart);
printf("Writing at 0x%08x\n", mtdoffset);
if (IS_NANDWRITE)
printf("Writing at 0x%08x\n", mtdoffset);
else if (mtdoffset > blockstart) {
int bad_len = MIN(mtdoffset, limit) - blockstart;
dump_bad(&meminfo, bad_len, !(opts & OPT_o));
}
if (mtdoffset >= limit)
break;
}
xlseek(fd, mtdoffset, SEEK_SET);
/* get some more data from input */
cnt = full_read(STDIN_FILENO, filebuf, meminfo_writesize);
cnt = full_read(input_fd, filebuf, meminfo_writesize);
if (cnt == 0) {
/* even with -p, we do not pad past the end of input
* (-p only zero-pads last incomplete page)
@ -112,20 +202,29 @@ int nandwrite_main(int argc UNUSED_PARAM, char **argv)
break;
}
if (cnt < meminfo_writesize) {
if (IS_NANDDUMP)
bb_error_msg_and_die("short read");
if (!(opts & OPT_p))
bb_error_msg_and_die("input size is not rounded up to page size, "
"use -p to zero pad");
/* zero pad to end of write block */
memset(filebuf + cnt, 0, meminfo_writesize - cnt);
}
xlseek(fd, mtdoffset, SEEK_SET);
xwrite(fd, filebuf, meminfo_writesize);
xwrite(output_fd, filebuf, meminfo_writesize);
if (IS_NANDDUMP && !(opts & OPT_o)) {
/* Dump OOB data */
oob.start = mtdoffset;
xioctl(fd, MEMREADOOB, &oob);
xwrite(output_fd, oobbuf, meminfo.oobsize);
}
mtdoffset += meminfo_writesize;
if (cnt < meminfo_writesize)
break;
}
if (cnt != 0) {
if (IS_NANDWRITE && cnt != 0) {
/* We filled entire MTD, but did we reach EOF on input? */
if (full_read(STDIN_FILENO, filebuf, meminfo_writesize) != 0) {
/* no */