Unable to fdisk DOC2000

Hello,
I'm using a stock 2.4.4 kernel with the MTD driver
compiled into the kernel. I've managed to get the driver to recognize the DOC so that it says:

M-Systems DiskOnChip driver. (C) 1999 Machine Vision Holdings, Inc. DiskOnChip 2000 found at address 0xCE000
Flash chip found: Manufacturer ID: 98, Chip ID: 73 (Toshiba TH58V128DC) 1 flash chips found. Total DiskOnChip size: 16 Mb

The FTL driver, however gives:

ftl_cs: FTL header not found.

The NFTL driver then says:

M-Systems NAND Flash Translation Layer driver. (C) 1999 MVHI $Id: nftl.c,v 1.57 2000/12/01 17:51:54 dwmw2 Exp $ Could not find valid boot record
Could not mount NFTL device

According to a post I saw earlier, this means the DOC is "hosed" and needs to be formatted. When I run nftl_format I get:

Erase size not 8 Kb - I'm confused

I removed the check for the erase size as someone else suggested and nftl_format appeared to work okay going through Phase 1, 2a, 2b, and 3 with no errors.

However, when I try to fdisk /dev/nftla I get:

Unable to open /dev/nftla

When I cat /proc/mtd I get:

mtd0: 01000000 "DiskOnChip 2000"

which looks different than I expected.

Does anybody have any idea why fdisk won't work?

Thanks,

Sean Simmons

Lead Firmware Engineer                    9855 Businesspark Ave
RD Instruments                            San Diego, CA 92131
email:  [email protected]        phone:  (858)693-1178
web:    http://www.rdinstruments.com      fax:    (858)695-1459

Hi Sean,
This is exactly what appeared when I first tried the MTD drivers out on my system (Virgin webplayer hardware - Geode Gxl 200Mhz SBC). I had to modify the delay in doc2000.c to be 4 times as long before it would work.

There's a post further back in the list that has a little more detail, and a small patch that does it is at
http://virgin-linux.sourceforge.net/cgi-bin/ax.cgi?/doc2000-patch

Note that this *really* kills DoC read/write performance.... one day I might see about adjusting all the delays in there.

Hope this helps,
Dave

----- Original Message -----
From: "Sean Simmons" <[email protected]>
To: <[email protected]>
Sent: Monday, May 14, 2001 6:17 AM
Subject: Unable to fdisk DOC2000