From: Sascha Hauer <s.hauer@pengutronix.de>
To: Gabriel Tisan <gabriel.tisan@gmail.com>
Cc: barebox@lists.infradead.org
Subject: Re: issue with imx35 external boot from Micron 4k flash
Date: Fri, 10 Aug 2012 11:18:07 +0200 [thread overview]
Message-ID: <20120810091807.GA1451@pengutronix.de> (raw)
In-Reply-To: <CAD9ZU8BDoYe9WA11i1PjuU=AkZW3QzKActY4SuCxEfKoVwLZGw@mail.gmail.com>
On Fri, Aug 10, 2012 at 11:11:49AM +0200, Gabriel Tisan wrote:
> Hi !
>
> I try to boot a custom board(based on imx35) from a Micron NAND
> flash(4K pagesize, 224 bytes OOB, 256K writesize).
> Using a JTAG debugger, I found that the internal Freescale firmware
> copied the first 4K from flash
> without errors to NFC internal buffer, but then it does not jump to
> this buffer how is specified in specs.
> So the barebox code is never called.
> If I jump manually via JTAG debugger, barebox boot up without any
> problems. I use external boot and write/dump to/from flash works well.
> Of course for imx35 I used just the supported 218 bytes of OOB.
>
> Freescale support told me that there is a boot problem with imx35 when
> is used with flashes that need more time after RESET command.
> On the same board I used before also a Micron flash(2K pagesize, 64
> bytes OOB, 128K writesize) that has the same hardware timing for
> RESET.
> However I suppose that the flash is out of RESET, because otherwise
> could not copy without any ECC error the first 4K data.
>
> Has anybody experienced some kind of problems ? Do you see a workaround ?
Never seen this. Maybe you could try internal boot mode?
Sascha
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prev parent reply other threads:[~2012-08-10 9:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-10 9:11 Gabriel Tisan
2012-08-10 9:18 ` Sascha Hauer [this message]
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