From mboxrd@z Thu Jan  1 00:00:00 1970
From: Scott Wood <scottwood@freescale.com>
Date: Wed, 17 Feb 2010 13:10:48 -0600
Subject: [U-Boot] [PATCH] add explicit bbt creation to commandline
In-Reply-To: <27625639.post@talk.nabble.com>
References: <20080706080456.GF4167@prithivi.gnumonks.org>	<27558231.post@talk.nabble.com>	<20100212170411.GA21800@loki.buserror.net>	<27566937.post@talk.nabble.com>
	<4B759454.8070906@freescale.com>	<27567768.post@talk.nabble.com>
	<4B75A3BA.8000501@freescale.com>	<27568153.post@talk.nabble.com>
	<27568365.post@talk.nabble.com>	<4B75C6C0.8020706@freescale.com>
	<27571823.post@talk.nabble.com>	<20100216183514.GA26893@loki.buserror.net>
	<27625639.post@talk.nabble.com>
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Steven Zedeck wrote:
> Scott Wood-2 wrote:
>> On Fri, Feb 12, 2010 at 06:14:51PM -0800, Steven Zedeck wrote:
>>> int board_nand_init(struct nand_chip *nand)
>>> {
>>> 	nand->ecc.mode = NAND_ECC_SOFT;
>>> #ifdef CFG_NAND_DBW_16
>>> 	nand->options = NAND_BUSWIDTH_16;
>>> #endif
>>> 	nand->cmd_ctrl = at91sam9rlek_nand_hwcontrol;
>>> 	nand->dev_ready = at91sam9rlek_nand_ready;
>>> 	nand->chip_delay = 20;
>>>
>>> 	return 0;
>>> }
>> Add "nand->options |= NAND_USE_FLASH_BBT;".
[snip]
> I really appreciate your help. I added what you suggested, except since we
> are using an 8 bit wide bus and not 16 I had to do the following:
> 
> #ifdef CFG_NAND_DBW_8
>     nand->options |= NAND_USE_FLASH_BBT;
> #endif

I don't see why the ifdef is needed -- just don't put it inside (or 
before) the other ifdef.

> Now when my board boots I get this and then it just stops:
> NAND:  Entering nand_init
> Nand Base 0x40000000
> Bad block table not found for chip 0
> Bad block table not found for chip 0

The messages are expected on the first boot -- but it should then create 
the bad block table.

You'll have to debug to find out why it's hanging.  If you don't set 
NAND_USE_FLASH_BBT, does ordinary nand read/write from the u-boot prompt 
work?

-Scott