From mboxrd@z Thu Jan  1 00:00:00 1970
From: Manuel Sahm <Manuel.Sahm@feig.de>
Date: Tue, 25 Mar 2008 17:19:17 +0100
Subject: [U-Boot-Users] make env
In-Reply-To: <87fxufc4cx.fsf@denx.de>
References: <20080320201156.GA22544@michl.2n.cz>	<20080320212718.1954D24A8B@gemini.denx.de>	<20080320213357.GA22780@michl.2n.cz>
	<47E8F686.9020903@feig.de> <87fxufc4cx.fsf@denx.de>
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To: u-boot@lists.denx.de

Hello,

but why is there a error concerning NAND flashs if only NOR flashs are 
supported ?

"nand_write: attempting to write not page aligned data"

Thank you
Manuel Sahm

Markus Klotzb?cher schrieb:
> Hi Manuel,
>
> Manuel Sahm <Manuel.Sahm@feig.de> writes:
>
>   
>> I took the U-Boot version 1.3.2; now I am able to generate the make env 
>> -> fw_printenv utility.
>>
>> I copy the jw_printenv binary and rename it to fw_setenv.
>>     
>
> A (hard) link would be enough.
>
>   
>> I use the config file in the /etc directory.
>> I want to access a NAND flash. [Pagesize = 0x800; ERASEBLOCKSIZE=0x20000]
>> My uboot is in mtd1.
>> mtd1 is from 0x20000 ... 0x100000 in my NAND-Flash
>> The Uboot enviroment is from 0x60000...0x80000; the redundant from 
>> 0x80000...0x100000
>>
>> My fw_config file is:
>>
>> /dev/mtd1      0x40000   0x20000   0x20000
>> /dev/mtd1      0x60000   0x20000   0x20000
>>
>> Is this correct ?
>>     
>
> Looks OK to me.
>
>   
>> I am able tu use fw_printenv, the variables are printed on the console
>> If I use fw_setenv I get errors:
>>
>> fw_setenv test 1
>>
>> Unlocking Flash
>> Done
>> nand_write: attempting to write not page aligned data
>> Erasing old enviroment
>> Done
>> Writing enviroment to /dev/mtd1: Invalid argument
>> Error: can?t write fw_env to flash
>>
>> What?s wrong ????
>>     
>
> I think the problem is that the fw_setenv so far only supports NOR
> flash. Environment in NAND is implemented slightly different, especially
> it doesn't (and can't) invalidate the former valid environment after the
> updated one was written successfully. So I'm afraid you will have to
> update this tool to support NAND.
>
> Best regards
>
> Markus Klotzbuecher
>
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