How can I use fw_setenv on SABRE-AI board ?

shu-kangtseng · ‎01-07-2015

Dear all,

Now I use SABRE-AI board.

The u-boot store in NAND flash (MT29F64G08AFAAAWP).

u-boot version is u-boot-2009.08 that get from LTIB.

<<build fw_printenv, fw_setenv>>

# cd u-boot-2009.08

u-boot-2009.08# make mx6dl_sabreauto_nand_config

u-boot-2009.08# make env

u-boot-2009.08# cp tools/env/fw_printenv tools/env/fw_setenv

copy fw_printenv and fw_setenv to SABRE-AI board (/home/linaro/ directory).

<<following is my /etc/fw_env.config on SABRE-AI>>

root@linaro-ubuntu-desktop:/home/linaro# cat /etc/fw_env.config

# MTD device name Device offset Env. size Flash sector size Number of sectors

/dev/mtd0 0x100000 0x2000 0x2000 1

<<fw_printenv, fw_setenv test on SABRE-AI board>>

root@linaro-ubuntu-desktop:/home/linaro#./fw_printenv bootdelay

bootdelay=3

root@linaro-ubuntu-desktop:/home/linaro# ./fw_setenv bootdelay 5

MTD erase error on /dev/mtd0: Invalid argument

Error: can't write fw_env to flash

root@linaro-ubuntu-desktop:/home/linaro#

<<Question>>

The fw_printenv command is OK.

The fw_setenv command fail.

Could you help me to fix fw_setenv fail ?

Thank you very much

-Jason

Yuri · ‎01-07-2015

To configure correctly fw_env.config, please use section FLASH and environment

organization in the board header file in U-boot directory

\include\configs\mx6qsabreauto.h

There environment parameters are as following :

CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, CONFIG_ENV_SIZE.

Device offset (of Linux fw_env.config) = CONFIG_ENV_OFFSET

Env. size = CONFIG_ENV_SIZE

Flash sector size = CONFIG_ENV_SIZE.

Have a great day,
Yuri

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shu-kangtseng · ‎01-08-2015

Hi Yuri,

Thanks about your reply.

I use SABRE-AI Dual Lite CPU board.

My u-boot store in the NAND flash (MT29F64G08AFAAAWP).

So I refer include\configs\mx6dl_sabreauto_nand.h.

Following get from mx6dl_sabreauto_nand.h.

#define CONFIG_ENV_SECT_SIZE (8 * 1024)

#define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE

#define CONFIG_ENV_OFFSET 0x100000

8 * 1024 = 0x2000

So my /etc/fw_env.config is