From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from majordomo by infradead.org with local (Exim 3.20 #2) id 14bYfB-0004gQ-00 for mtd-list@infradead.org; Sat, 10 Mar 2001 01:59:21 +0000 Received: from shell9.ba.best.com ([206.184.139.140] ident=root) by infradead.org with esmtp (Exim 3.20 #2) id 14bYf9-0004gK-00 for mtd@infradead.org; Sat, 10 Mar 2001 01:59:20 +0000 From: Subodh Nijsure Message-Id: <200103100158.RAA06216@shell9.ba.best.com> Subject: Re: AW: JFFS on a powerpc platform. To: schirmer@taytron.net, mtd@infradead.org Date: Fri, 9 Mar 2001 17:58:26 -0800 (PST) Cc: subodh@best.com MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-mtd@infradead.org List-ID: I still have that problem now its slightly different problem. It looks like problem with 'interleaving' This is how my mtd memory space looks like -- cat /proc/mtd mtd0: 00400000 00020000 "Physically mapped flash" mtd1: 00080000 00020000 "Bootrom Area" mtd2: 00040000 00020000 "Custom Flash Bank #2 2x128KB" mtd3: 00040000 00020000 "Custom Flash Bank #2 2x128KB" mtd4: 00300000 00020000 "Custom Flash left overs from 4MB Flash" Now the first device /dev/mtd1 contains the bootrom so I copy /dev/mtd1 to file and it looks like this -- cat < /dev/mtd1 > /tmp/bootrom 'V|~?&tcN |~N MTDSkyStream Bootrom (ver 0.1) (Mar 8 2001 - 10:26:50) doc_loadbios /dev/mtd4 bootrom Now if I try to dump the /dev/mtd4 I get following output cat < /dev/mtd4 | more '&?~|ct N&| NSDTMtSykmaerooB mortev( .0 r( )1 raM2 9 10061 -:52:)44 Now if I do eraseall /dev/mtd0 I see data in flash as FFFF0080 FFFF0080.. instead of FFFFFFFF FFFFFFFF... So it looks like for some reason one of the chip is not getting erased? In my kernel config as interleave '2' as I have two chips giving me 32 bit access. CONFIG_MTD_CFI=y CONFIG_MTD_CFI_GEOMETRY=y # CONFIG_MTD_CFI_B1 is not set # CONFIG_MTD_CFI_B2 is not set CONFIG_MTD_CFI_B4=y # CONFIG_MTD_CFI_I1 is not set CONFIG_MTD_CFI_I2=y # CONFIG_MTD_CFI_I4 is not set CONFIG_MTD_CFI_INTELEXT=y Interleaving factor is '2' as my CPU A1 is connected to A0 of the chip. Any more hints on why I would be getting this "flipping" of bits? Thanks!! /Subodh To unsubscribe, send "unsubscribe mtd" to majordomo@infradead.org