X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=miscutils%2Fnandwrite.c;h=29c800612467057dd6fd603fa4336e82c2b07517;hb=4c9455f967e21d30db0de2e13b6e1115ab8f36ce;hp=a20f7f38415ca3a750eecf0753312b9a7c0343e6;hpb=6f32ea4039535c48759a217fd6352193846a393c;p=oweals%2Fbusybox.git diff --git a/miscutils/nandwrite.c b/miscutils/nandwrite.c index a20f7f384..29c800612 100644 --- a/miscutils/nandwrite.c +++ b/miscutils/nandwrite.c @@ -1,5 +1,5 @@ /* - * nandwrite.c - ported to busybox from mtd-utils + * nandwrite and nanddump ported to busybox from mtd-utils * * Author: Baruch Siach , Orex Computed Radiography * @@ -7,41 +7,109 @@ * * TODO: add support for large (>4GB) MTD devices */ - -//applet:IF_NANDWRITE(APPLET(nandwrite, _BB_DIR_USR_SBIN, _BB_SUID_DROP)) - -//kbuild:lib-$(CONFIG_NANDWRITE) += nandwrite.o - //config:config NANDWRITE -//config: bool "nandwrite" -//config: default n -//config: depends on PLATFORM_LINUX +//config: bool "nandwrite (5.9 kb)" +//config: default y +//config: select PLATFORM_LINUX +//config: help +//config: Write to the specified MTD device, with bad blocks awareness +//config: +//config:config NANDDUMP +//config: bool "nanddump (6.3 kb)" +//config: default y +//config: select PLATFORM_LINUX //config: help -//config: Write to the specified MTD device, with bad blocks awareness +//config: Dump the content of raw NAND chip -#include "libbb.h" -#include +//applet:IF_NANDWRITE(APPLET(nandwrite, BB_DIR_USR_SBIN, BB_SUID_DROP)) +//applet:IF_NANDDUMP(APPLET_ODDNAME(nanddump, nandwrite, BB_DIR_USR_SBIN, BB_SUID_DROP, nanddump)) + +//kbuild:lib-$(CONFIG_NANDWRITE) += nandwrite.o +//kbuild:lib-$(CONFIG_NANDDUMP) += nandwrite.o //usage:#define nandwrite_trivial_usage -//usage: "[-p] [-s ADDR] MTD_DEVICE [FILE]" +//usage: "[-np] [-s ADDR] MTD_DEVICE [FILE]" //usage:#define nandwrite_full_usage "\n\n" -//usage: "Write to the specified MTD device\n" -//usage: "\nOptions:" +//usage: "Write to MTD_DEVICE\n" +//usage: "\n -n Write without ecc" //usage: "\n -p Pad to page size" //usage: "\n -s ADDR Start address" +//usage:#define nanddump_trivial_usage +//usage: "[-no]" IF_LONG_OPTS(" [--bb padbad|skipbad]") " [-s ADDR] [-l LEN] [-f FILE] MTD_DEVICE" +//usage:#define nanddump_full_usage "\n\n" +//usage: "Dump MTD_DEVICE\n" +//usage: "\n -n Read without ecc" +//usage: "\n -o Dump oob data" +//usage: "\n -s ADDR Start address" +//usage: "\n -l LEN Length" +//usage: "\n -f FILE Dump to file ('-' for stdout)" +//usage: IF_LONG_OPTS( +//usage: "\n --bb METHOD" +//usage: "\n skipbad: skip bad blocks" +//usage: "\n padbad: substitute bad blocks by 0xff (default)" +//usage: ) + +#include "libbb.h" +#include + +/* Old headers call it MTD_MODE_RAW. + * FIXME: In kernel headers, MTD_FILE_MODE_RAW is not a define, + * it's an enum. How I can test for existence of an enum? + */ +#if !defined(MTD_FILE_MODE_RAW) +# define MTD_FILE_MODE_RAW 3 +#endif + + +#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_n (1 << 1) +#define OPT_s (1 << 2) +#define OPT_f (1 << 3) +#define OPT_l (1 << 4) +#define OPT_bb (1 << 5) /* must be the last one in the list */ + +#define BB_PADBAD (1 << 0) +#define BB_SKIPBAD (1 << 1) + +/* 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 only if len is not already on a page */ + len = ((len - 1) | (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; } } @@ -49,29 +117,58 @@ 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; unsigned opts; + unsigned bb_method = BB_SKIPBAD; int fd; ssize_t cnt; - unsigned mtdoffset, meminfo_writesize; + 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, *opt_bb; + + if (IS_NANDDUMP) { + opts = getopt32long(argv, "^" "ons:f:l:" "\0" "=1", + "bb\0" Required_argument "\xff", /* no short equivalent */ + &opt_s, &opt_f, &opt_l, &opt_bb + ); + } else { /* nandwrite */ + opts = getopt32(argv, "^" "pns:" "\0" "-1:?2", &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); + fd = xopen(argv[0], IS_NANDWRITE ? O_RDWR : O_RDONLY); xioctl(fd, MEMGETINFO, &meminfo); - mtdoffset = xatou(opt_s); + if (opts & OPT_n) + xioctl(fd, MTDFILEMODE, (void *)MTD_FILE_MODE_RAW); + + 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; + } + if (IS_NANDDUMP && (opts & OPT_bb)) { + if (strcmp("skipbad", opt_bb) == 0) + bb_method = BB_SKIPBAD; + else if (strcmp("padbad", opt_bb) == 0) + bb_method = BB_PADBAD; + else + bb_show_usage(); + } /* Pull it into a CPU register (hopefully) - smaller code that way */ meminfo_writesize = meminfo.writesize; @@ -80,17 +177,69 @@ int nandwrite_main(int argc UNUSED_PARAM, char **argv) bb_error_msg_and_die("start address is not page aligned"); filebuf = xmalloc(meminfo_writesize); + oobbuf = xmalloc(meminfo.oobsize); + + oob.start = 0; + oob.length = meminfo.oobsize; + oob.ptr = oobbuf; + + blockstart = mtdoffset & ~(meminfo.erasesize - 1); + if (blockstart != mtdoffset) { + unsigned tmp; + /* mtdoffset is in the middle of an erase block, verify that + * this block is OK. Advance mtdoffset only if this block is + * bad. + */ + tmp = next_good_eraseblock(fd, &meminfo, blockstart); + if (tmp != blockstart) { + /* bad block(s), advance mtdoffset */ + if (IS_NANDDUMP) { + if (bb_method == BB_PADBAD) { + int bad_len = MIN(tmp, end_addr) - mtdoffset; + dump_bad(&meminfo, bad_len, opts & OPT_o); + } + /* with option skipbad, increase the total length */ + if (bb_method == BB_SKIPBAD) { + end_addr += (tmp - blockstart); + } + } + mtdoffset = tmp; + } + } cnt = -1; - while (mtdoffset < meminfo.size) { - unsigned blockstart = mtdoffset & ~(meminfo.erasesize - 1); + 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) { + if (bb_method == BB_PADBAD) { + /* dump FF padded bad block */ + int bad_len = MIN(mtdoffset, limit) - blockstart; + dump_bad(&meminfo, bad_len, opts & OPT_o); + } else if (bb_method == BB_SKIPBAD) { + /* for skipbad, increase the length */ + if ((end_addr + mtdoffset - blockstart) > end_addr) + end_addr += (mtdoffset - blockstart); + else + end_addr = ~0; + limit = MIN(meminfo.size, end_addr); + } + } + 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) @@ -98,20 +247,29 @@ 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 */