@@ -606,6 +606,22 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
ret = nand->read_oob(nand, off, &ops);
else
ret = nand->write_oob(nand, off, &ops);
+ } else if (!strcmp(s, ".raw")) {
+ /* Raw access */
+ mtd_oob_ops_t ops = {
+ .datbuf = (u8 *)addr,
+ .oobbuf = ((u8 *)addr) + nand->writesize,
+ .len = nand->writesize,
+ .ooblen = nand->oobsize,
+ .mode = MTD_OOB_RAW
+ };
+
+ rwsize = nand->writesize + nand->oobsize;
+
+ if (read)
+ ret = nand->read_oob(nand, off, &ops);
+ else
+ ret = nand->write_oob(nand, off, &ops);
} else {
printf("Unknown nand command suffix '%s'.\n", s);
return 1;
@@ -695,10 +711,11 @@ U_BOOT_CMD(
"NAND sub-system",
"info - show available NAND devices\n"
"nand device [dev] - show or set current device\n"
- "nand read - addr off|partition size\n"
- "nand write - addr off|partition size\n"
+ "nand read[.raw] - addr off|partition\n"
+ "nand write[.raw] - addr off|partition\n"
" read/write 'size' bytes starting at offset 'off'\n"
" to/from memory address 'addr', skipping bad blocks.\n"
+ " Use read.raw/write.raw to avoid ECC and write the block as-is.\n"
#ifdef CONFIG_CMD_NAND_TRIMFFS
"nand write.trimffs - addr off|partition size\n"
" write 'size' bytes starting at offset 'off' from memory address\n"
@@ -94,6 +94,15 @@ Commands:
of data for one 512-byte page or 2 256-byte pages. There is no check
for bad blocks.
+ nand read.raw addr ofs|partition
+ Read block from `ofs' in NAND flash to `addr'. This reads the raw block,
+ so ECC is avoided and the OOB area is read as well.
+
+ nand write.raw addr ofs|partition
+ Write block from `addr' to `ofs' in NAND flash. This writes the raw block,
+ so ECC is avoided and the OOB area is written as well, making the whole
+ block written as-is.
+
Configuration Options:
CONFIG_CMD_NAND
These commands should work around various "hardware" ECC and BCH methods. Signed-off-by: Marek Vasut <marek.vasut@gmail.com> Cc: Scott Wood <scottwood@freescale.com> Cc: Stefano Babic <sbabic@denx.de> Cc: Wolfgang Denk <wd@denx.de> Cc: Detlev Zundel <dzu@denx.de> --- common/cmd_nand.c | 21 +++++++++++++++++++-- doc/README.nand | 9 +++++++++ 2 files changed, 28 insertions(+), 2 deletions(-) V2: Add documentation. V3: Drop size param.