Commit 56086921 authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Wolfgang Denk
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fw_env: add NAND support

Add support for environment in NAND with automatic NOR / NAND recognition,
including unaligned environment, bad-block skipping, redundant environment
Signed-off-by: default avatarGuennadi Liakhovetski <>
parent dd794323
......@@ -22,9 +22,11 @@ following lines are relevant:
#define DEVICE1_OFFSET 0x0000
#define ENV1_SIZE 0x4000
#define DEVICE1_ESIZE 0x4000
#define DEVICE2_OFFSET 0x0000
#define ENV2_SIZE 0x4000
#define DEVICE2_ESIZE 0x4000
Current configuration matches the environment layout of the TRAB
......@@ -46,3 +48,7 @@ then 1 sector.
DEVICEx_ESIZE defines the size of the first sector in the flash
partition where the environment resides.
DEVICEx_ENVSECTORS defines the number of sectors that may be used for
this environment instance. On NAND this is used to limit the range
within which bad blocks are skipped, on NOR it is not used.
This diff is collapsed.
# Configuration file for fw_(printenv/saveenv) utility.
# Up to two entries are valid, in this case the redundand
# environment sector is assumed present.
# Notice, that the "Number of sectors" is ignored on NOR.
# MTD device name Device offset Env. size Flash sector size
# MTD device name Device offset Env. size Flash sector size Number of sectors
/dev/mtd1 0x0000 0x4000 0x4000
/dev/mtd2 0x0000 0x4000 0x4000
# NAND example
#/dev/mtd0 0x4000 0x4000 0x20000 2
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