[U-Boot-Users] Problem using cfi_flash driver for s29GL512N flashes

[Santigopal Mondal]

Hi Stephan ,
 Thanks for your help. The same problem remains with the upgraded version
also.

 Is it something to do with the TEXT_BASE. The probelm is the data for
environment is written to flash properly. But when it checks for crc in
env_init() the crc32 function fails. the env_ptr->crc is correct.

 The environment sector when allocated in malloc area in main memory seems to
get corrupted because the crc field does not seem to be correct.


 the Ram is 32 MB
 TEXT_BASE 21F00000
 CFG_GBL_DATA_SIZE 128
 CFG_ENV_ADDR (CFG_FLASH_BASE + 0x20000)
 CFG_ENV_SIZE 0x2000
 CFG_ENV_SECT_SIZE 0x20000
 CONFIG_STACKSIZE (32 * 1024)
 CFG_MALLOC_LEN (CFG_ENV_SIZE + 128*1024)

 thanks & regards
 santi gopal


Santi Gopal Mondal
Senior Engineer, R&D Services
Mindtree Consulting 
Mobile: 09886325167



-----Original Message-----
From: Stefan Roese [mailto:sr at denx.de]
Sent: Tue 11/27/2007 11:41 AM
To: u-boot-users at lists.sourceforge.net
Cc: Santigopal Mondal
Subject: Re: [U-Boot-Users] Problem using cfi_flash driver for s29GL512N
flashes
 
On Tuesday 27 November 2007, santigopal_mondal at mindtree.com wrote:
>  Greetings everybody..I am using u-boot1.1.5 for at91rm9200ek type
> board(arm).

U-Boot 1.1.5 is *old*. I suggest upgrading to the current version. Lot's of 
things got fixed here.

> The flash memory used here is s29GL512N(128k sectors).I am able 
> to configure the board/config flle properly it seems. The driver also
> erases/writes properly it seems. The problem is when I am trying to save
> environment variables it is getting set but in some cases after a reset it
> is showing Bad CRC and getting to the default environment. The other thing
> is I am not able to boot the kernel image from the flash due to some bad
> checksum error. Everywhere the problem is related to crc. I am a bit
> confused why the CRC check fails everytime? Is it not writing properly and
> if it is not writing properly then how it is able to get the u-boot
> prompt..
>
> The required configurations defined
>
> #define CFG_ENV_ADDR (CFG_FLASH_BASE + 0x20000)
> #define CFG_ENV_SIZE 0x2000
> #define CFG_ENV_SECT_SIZE 0x20000
> #define CFG_MALLOC_LEN (CFG_ENV_SIZE + 128*1024)
> #define CONFIG_STACKSIZE (32 * 1024)
>
> The TEXT_BASE in config.mk :
>
>  TEXT_BASE 0x21F00000
>
>  Please help as soon as possible...

Debugging this problem in the old U-Boot version doesn't seem to make sense
to 
me. Please try to upgrade.

Best regards,
Stefan

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