From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Roese Date: Mon, 13 Jul 2009 11:03:11 +0200 Subject: [U-Boot] [PATCH] [PATCH v2] issue write command to base for JEDEC flash In-Reply-To: <1247220237-25652-1-git-send-email-ratbert.chuang@gmail.com> References: <1247220237-25652-1-git-send-email-ratbert.chuang@gmail.com> Message-ID: <200907131103.11575.sr@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Friday 10 July 2009 12:03:57 ratbert.chuang at gmail.com wrote: > From: Po-Yu Chuang > > 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 ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office at denx.de =====================================================================