From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp04.msg.oleane.net (smtp04.msg.oleane.net [62.161.4.4]) by ozlabs.org (Postfix) with ESMTP id 784B5DDFE1 for ; Tue, 12 Jun 2007 01:46:02 +1000 (EST) Received: from GEG2400 ([194.3.133.184]) (authenticated) by smtp04.msg.oleane.net (MTA) with ESMTP id l5BFKkP6029675 for ; Mon, 11 Jun 2007 17:20:47 +0200 From: "Laurent Lagrange" To: Subject: Linux 2.6.x, MTD drivers and NAND flashes Date: Mon, 11 Jun 2007 17:20:43 +0200 Message-ID: <000001c7ac3c$15e7da80$5201a8c0@GEG2400> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C7AC4C.D972F470" In-Reply-To: List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C7AC4C.D972F470 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hello, I use a Linux 2.6.9 on a 85xx custom board with a NAND flash. This flash has some bad blocks. NAND device: Manufacturer ID: 0xec, Chip ID: 0xf1 (Samsung NAND 128MiB 3,3V 8-bit) Scanning device for bad blocks Bad eraseblock 8 at 0x00100000 Bad eraseblock 430 at 0x035c0000 ... Creating 1 MTD partitions on "NAND 128MiB 3,3V 8-bit": 0x00000000-0x08000000 : "flash partition 1". I have selected in the kernel : 1) the MTD character and block supports for NAND, 2) the CRAMFS and JFFS2 supports for NAND. I can erase the flash but receive IO errors for each bad blocks (that seems right). I can mount an empty JFFS2 partition on the NAND and untar some directories and files in it. I would like to generate some JFFS2 images and program them in the flash with a character command like "cat img > /dev/mtd/0". If I dont encounter a bad block, it runs right else the command fails. This is a little bit annoying. So my question is simple : Is there a MTD character driver which can detect and ignore the bad blocks in a NAND flash ? Thanks for any tips. Bye Laurent ------=_NextPart_000_0001_01C7AC4C.D972F470 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hello,

I use a Linux 2.6.9 on a = 85xx custom=20 board with a NAND flash.

This flash has some bad = blocks.

NAND device: Manufacturer ID: 0xec, = Chip ID: 0xf1=20 (Samsung NAND 128MiB 3,3V 8-bit)
Scanning device for bad = blocks
Bad=20 eraseblock 8 at 0x00100000
Bad eraseblock 430 at = 0x035c0000

...
Creating 1 MTD partitions on = "NAND 128MiB=20 3,3V 8-bit":
0x00000000-0x08000000 : "flash partition = 1".

I have selected in the kernel = :

1) the MTD character and block supports = for=20 NAND,

2) the CRAMFS and JFFS2 supports for=20 NAND.

I can erase the flash but receive IO = errors for=20 each bad blocks (that seems right).

I can mount an empty JFFS2 partition on = the NAND=20 and untar some directories and files in it.

I would like to generate some JFFS2 = images and=20 program them in the flash with a = character=20

command like "cat img > /dev/mtd/0". = If I dont encounter a bad block, it = runs=20 right else the

command fails.

This is a little bit annoying. So = my question is simple :

Is there a MTD character driver which = can detect=20 and ignore the bad blocks in a NAND flash ?

Thanks for any tips.

Bye

Laurent

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