[PATCH] new nanddump applet
Baruch Siach
baruch at tkos.co.il
Tue Oct 12 07:32:08 UTC 2010
Port of the mtd-utils nanddump utility. This nanddump implementation is added
to nandwrite.c for the sake of code sharing.
Signed-off-by: Baruch Siach <baruch at tkos.co.il>
---
miscutils/nandwrite.c | 156 +++++++++++++++++++++++++++++++++++++++++--------
1 files changed, 132 insertions(+), 24 deletions(-)
diff --git a/miscutils/nandwrite.c b/miscutils/nandwrite.c
index f422426..decdcad 100644
--- a/miscutils/nandwrite.c
+++ b/miscutils/nandwrite.c
@@ -1,5 +1,5 @@
/*
- * nandwrite.c - ported to busybox from mtd-utils
+ * nandwrite.c - nandwrite and nanddump ported to busybox from mtd-utils
*
* Author: Baruch Siach <baruch at 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"
@@ -18,6 +20,13 @@
//config: depends on PLATFORM_LINUX
//config: help
//config: Write to the specified MTD device, with bad blocks awareness
+//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
#include "libbb.h"
#include <mtd/mtd-user.h>
@@ -30,18 +39,68 @@
//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)"
+
+#define do_nanddump (ENABLE_NANDDUMP && \
+ (!ENABLE_NANDWRITE || (applet_name[4] == 'd')))
+
+#define do_nandwrite (!do_nanddump)
+
+#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)
+
+/* Buffer for OOB data */
+#define NAND_MAX_OOBSIZE 256
+static unsigned char oobbuf[NAND_MAX_OOBSIZE];
+
+/* 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 (do_nandwrite)
+ bb_error_msg_and_die("not enough space in MTD device");
+ else
+ 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 (do_nandwrite)
+ printf("Skipping bad block at 0x%08x\n", block_offset);
block_offset += meminfo->erasesize;
}
}
@@ -52,28 +111,47 @@ int nandwrite_main(int argc UNUSED_PARAM, char **argv)
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),
- };
-
- opt_complementary = "-1:?2";
- opts = getopt32(argv, "ps:", &opt_s);
+ const char *opt_s = "0", *opt_f = "-", *opt_l;
+
+ if (do_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 (do_nandwrite && argv[1])
+ opt_f = argv[1];
+ if (!LONE_DASH(opt_f)) {
+ int tmp_fd = xopen3(opt_f, do_nandwrite ? O_RDONLY :
+ O_WRONLY | O_TRUNC | O_CREAT, 0644);
+ xmove_fd(tmp_fd, do_nandwrite ? STDIN_FILENO : STDOUT_FILENO);
+ }
fd = xopen(argv[0], O_RDWR);
xioctl(fd, MEMGETINFO, &meminfo);
+ oob.start = 0;
+ oob.length = meminfo.oobsize;
+ oob.ptr = oobbuf;
+
mtdoffset = bb_strtou(opt_s, NULL, 0);
if (errno)
bb_error_msg_and_die("invalid number '%s'", opt_s);
+ if (do_nanddump && (opts & OPT_l)) {
+ unsigned length = bb_strtou(opt_l, NULL, 0);
+ if (errno)
+ bb_error_msg_and_die("invalid number '%s'", opt_l);
+ 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 +169,41 @@ 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 (do_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 = do_nandwrite ? STDIN_FILENO : fd;
+ int output_fd = do_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);
+ mtdoffset = next_good_eraseblock(fd, &meminfo,
+ blockstart);
+ if (do_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 +211,29 @@ int nandwrite_main(int argc UNUSED_PARAM, char **argv)
break;
}
if (cnt < meminfo_writesize) {
- if (!(opts & OPT_p))
+ if (do_nanddump)
+ bb_error_msg_and_die("mtd short read");
+ else 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 (do_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 (do_nandwrite && cnt != 0) {
/* We filled entire MTD, but did we reach EOF on input? */
if (full_read(STDIN_FILENO, filebuf, meminfo_writesize) != 0) {
/* no */
--
1.7.1
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