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| author | Marek Vasut <marek.vasut@gmail.com> | 2011-09-23 15:43:10 +0200 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2011-10-03 18:35:12 -0500 |
| commit | fb3659ac422801ea18f36ef62926df70beeada4c (patch) | |
| tree | 80f4eb0ee045e88ef731eab2f494317e161379dc | |
| parent | 6d41419f0b010db03c01dec59875144457aa11d2 (diff) | |
| download | u-boot-imx-fb3659ac422801ea18f36ef62926df70beeada4c.zip u-boot-imx-fb3659ac422801ea18f36ef62926df70beeada4c.tar.gz u-boot-imx-fb3659ac422801ea18f36ef62926df70beeada4c.tar.bz2 | |
NAND: Add nand read.raw and write.raw commands
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>
[scottwood@freescale.com: s/write the page/access the page/]
Signed-off-by: Scott Wood <scottwood@freescale.com>
| -rw-r--r-- | common/cmd_nand.c | 19 | ||||
| -rw-r--r-- | doc/README.nand | 9 |
2 files changed, 28 insertions, 0 deletions
diff --git a/common/cmd_nand.c b/common/cmd_nand.c index 6edca76..1a67e4d 100644 --- a/common/cmd_nand.c +++ b/common/cmd_nand.c @@ -602,6 +602,22 @@ 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; @@ -695,6 +711,9 @@ U_BOOT_CMD( "nand write - addr off|partition size\n" " read/write 'size' bytes starting at offset 'off'\n" " to/from memory address 'addr', skipping bad blocks.\n" + "nand read.raw - addr off|partition\n" + "nand write.raw - addr off|partition\n" + " Use read.raw/write.raw to avoid ECC and access the page 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" diff --git a/doc/README.nand b/doc/README.nand index 751b693..023740e 100644 --- a/doc/README.nand +++ b/doc/README.nand @@ -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 page from `ofs' in NAND flash to `addr'. This reads the raw page, + so ECC is avoided and the OOB area is read as well. + + nand write.raw addr ofs|partition + Write page from `addr' to `ofs' in NAND flash. This writes the raw page, + so ECC is avoided and the OOB area is written as well, making the whole + page written as-is. + Configuration Options: CONFIG_CMD_NAND |