From: Stefan Roese <sr@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] [PATCH v2] issue write command to base for JEDEC flash
Date: Mon, 13 Jul 2009 11:03:11 +0200 [thread overview]
Message-ID: <200907131103.11575.sr@denx.de> (raw)
In-Reply-To: <1247220237-25652-1-git-send-email-ratbert.chuang@gmail.com>
On Friday 10 July 2009 12:03:57 ratbert.chuang at gmail.com wrote:
> From: Po-Yu Chuang <ratbert@faraday-tech.com>
>
> For JEDEC flash, we should issue word programming command relative to
> base address rather than sector base address. Original source makes
> SST Flash fails to program sectors which are not on the 0x10000 boundaries.
>
> e.g.
> SST39LF040 uses addr1=0x5555 and addr2=0x2AAA, however, each sector
> is 0x1000 bytes.
>
> Thus, if we issue command to "sector base (0x41000) + offset(0x5555)",
> it sends to 0x46555 and the chip fails to recognize that address.
>
> This patch is tested with SST39LF040.
Applied to u-boot-cfi. Thanks.
Best regards,
Stefan
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prev parent reply other threads:[~2009-07-13 9:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-10 10:03 [U-Boot] [PATCH] [PATCH v2] issue write command to base for JEDEC flash ratbert.chuang at gmail.com
2009-07-13 9:03 ` Stefan Roese [this message]
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