From mboxrd@z Thu Jan  1 00:00:00 1970
From: Aaron Williams <Aaron.Williams@caviumnetworks.com>
Date: Sat, 12 Feb 2011 04:06:00 -0800
Subject: [U-Boot] [PATCH 1/1] NAND Re: mtdparts fails with NAND >= 4GB -
	Second try
In-Reply-To: <4D565C00.2060403@free.fr>
References: <201101271624.31701.Aaron.Williams@caviumnetworks.com>
	<201102120054.45487.Aaron.Williams@caviumnetworks.com>
	<4D565C00.2060403@free.fr>
Message-ID: <201102120406.01194.Aaron.Williams@caviumnetworks.com>
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On Saturday, February 12, 2011 02:08:00 am Albert ARIBAUD wrote:
> Le 12/02/2011 09:54, Aaron Williams a ?crit :
> > Octeon ebb6300(ram)# mw.b 0x1f400000 0xf0
> > Octeon ebb6300(ram)# mw.b 0x1f400000 0xf0
> > Octeon ebb6300(ram)# mw.b 0x1f4000AA 0x98
> > Octeon ebb6300(ram)# md.b 0x1f400020 20
> > 1f400020: 51 51 52 52 59 59 02 02 00 00 40 40 00 00 00 00   
> > QQRRYY....@@.... 1f400030: 00 00 00 00 00 00 27 27 36 36 00 00 00 00 07
> > 07    ......''66......
> 
> This, according to the CFI spec, gives us the proof that the Spansion
> chip is a x16 device in x8 mode.
> 
> Can you now please, based on the knowledge that the device is x16 in x8
> mode, go through the CFI detection sequence agin and determine which
> line exactly fails to work as expected?
> 
> > -Aaron
> 
> Amicalement,

I'll take a look at this next week. The problem with the current code is that 
it detects the chip width of 8 but a port width of 16 which results in 16-bit 
writes. This fails for obtaining the manufacturer ID.

-Aaron