DOC2000 & NFTL problems

DOC2000 & NFTL problems

[Ciro Cattuto]

Hello,

I decided to give a try to the DOC2000/NFTL driver included in mtd.
I have an Eurotech PC104 SBC with a DOC socket. I'm using a 2 Mb DOC2000,
enabled in the SBC BIOS and mapped at 0xd8000.

Under DOS everything works fine: the systems detects, identifies and
formats the DOC. Everything is also fine with the binary-only Linux driver
provided by M-Systems, under Linux 2.0.38.

Next, I try Linux 2.2.16 with the mtd driver and patch.

 ---------------------------------------------------------------------
 M-Systems DiskOnChip driver. (C) 1999 Machine Vision Holdings, Inc.
 DiskOnChip 2000 found at address 0xD8000
 1 flash chips found. Total DiskOnChip size: 2 Mb
 Ignoring DiskOnChip 2000 at 0xDA000 - already configured
 M-Systems NAND Flash Translation Layer driver. (C) 1999 MVHI
 $Id: nftl.c,v 1.37 2000/07/26 10:02:27 dwmw2 Exp $
 ---------------------------------------------------------------------

...then I get the following message, repeated for all EUNs (0-511)...

 ---------------------------------------------------------------------
 EUN 506: EraseMark not 0x3c69 (0xffff 0xffff instead)
 ---------------------------------------------------------------------

...and when it comes to detecting the partition, I get:

 ---------------------------------------------------------------------
  nftla: unknown partition table
 ---------------------------------------------------------------------

NOTE: there _is_ a valid NFTL partition on the DOC, while the above happens.

Okay, now I try to format the DOC using nftl_format: no errors.
When I try to fdisk /dev/nftla, though, I get an invalid partition table.
Any attempt to write a new partition table results in the following:

 ---------------------------------------------------------------------
 NFTL_writeblock(): Cannot find block to write to
 end_request: I/O error, dev 5d:00 (unknown), sector 2
 No Virtual Unit Chains available for folding. Failing request
 Cannot make free space.
 ---------------------------------------------------------------------

...I'm probably missing something obvious, but I would still appreciate
some feedback on this problem. Thank you.

Cheers,

Ciro

-- 
Ciro Cattuto, Open Source Developer, Linuxcare Italia SpA
Tel. +39.338.3002140  Fax +39.049.8036484 
ciro@linuxcare.com    http://www.linuxcare.com/
ciro@prosa.it         http://www.prosa.it/
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Re: DOC2000 & NFTL problems

[Ciro Cattuto]

On Thu, Aug 03, 2000 at 12:45:06PM +0800, Ollie Lho wrote:

> It seems that the nftl.c can not find the correct NFTL partition on the DoC,
> can you use nftldump ??

Here it is. Any ideas?

Ciro

 --------------------------------------------------------------
 # ./nftldump
 NFTL Media Header found at offset 16000:
 NumEraseUnits:    501
 FirstPhysicalEUN: 11
 Formatted Size:   1998848
 UnitSizeFactor:   0xff
 Second NFTL Media Header found at offset 18000
 EraseMark not present in unit 11: 0
 Unit 11 is free
 EraseMark not present in unit 12: 0
 Unit 12 is free
 EraseMark not present in unit 13: 0
 Unit 13 is free
 EraseMark not present in unit 14: 0
 Unit 14 is free
 EraseMark not present in unit 15: 0
 [...]
 Unit 209 is free
 EraseMark not present in unit 210: 0
 Unit 210 is free
 Unit 211 is free
 EraseMark not present in unit 212: 0
 Unit 212 is free
 EraseMark not present in unit 213: 0
 [...]
 EraseMark not present in unit 463: 0
 Unit 463 is free
 EraseMark not present in unit 464: ffff
 Unit 464 is free
 EraseMark not present in unit 465: 0
 Unit 465 is free
 EraseMark not present in unit 466: 0
 [...]
 EraseMark not present in unit 509: 0
 Unit 509 is free
 EraseMark not present in unit 510: 0
 Unit 510 is free
 EraseMark not present in unit 511: 0
 Unit 511 is free
 Virtual Unit #0: Not present
 Virtual Unit #1: Not present
 Virtual Unit #2: Not present
 Virtual Unit #3: Not present
 Virtual Unit #4: Not present
 [...]
 Virtual Unit #243: Not present
 Virtual Unit #244: Not present
 # 
 --------------------------------------------------------------


-- 
Ciro Cattuto, Open Source Developer, Linuxcare Italia SpA
Tel. +39.338.3002140  Fax +39.049.8036484 
ciro@linuxcare.com    http://www.linuxcare.com/
ciro@prosa.it         http://www.prosa.it/
Linuxcare. Support for the revolution.




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Re: DOC2000 & NFTL problems

[Ollie Lho]

Ciro Cattuto wrote:
> 
> On Thu, Aug 03, 2000 at 12:45:06PM +0800, Ollie Lho wrote:
> 
> > It seems that the nftl.c can not find the correct NFTL partition on the DoC,
> > can you use nftldump ??
> 
> Here it is. Any ideas?
> 
> Ciro
> 
>  --------------------------------------------------------------
>  # ./nftldump
>  NFTL Media Header found at offset 16000:
>  NumEraseUnits:    501
>  FirstPhysicalEUN: 11
>  Formatted Size:   1998848
>  UnitSizeFactor:   0xff
>  Second NFTL Media Header found at offset 18000
>  EraseMark not present in unit 11: 0
>  Unit 11 is free
>  EraseMark not present in unit 12: 0
>  Unit 12 is free
>  EraseMark not present in unit 13: 0
>  Unit 13 is free
>  EraseMark not present in unit 14: 0
>  Unit 14 is free
>  EraseMark not present in unit 15: 0
>  [...]
>  Unit 209 is free
>  EraseMark not present in unit 210: 0
>  Unit 210 is free
>  Unit 211 is free
>  EraseMark not present in unit 212: 0
>  Unit 212 is free
>  EraseMark not present in unit 213: 0
>  [...]
>  EraseMark not present in unit 463: 0
>  Unit 463 is free
>  EraseMark not present in unit 464: ffff
>  Unit 464 is free
>  EraseMark not present in unit 465: 0
>  Unit 465 is free
>  EraseMark not present in unit 466: 0
>  [...]
>  EraseMark not present in unit 509: 0
>  Unit 509 is free
>  EraseMark not present in unit 510: 0
>  Unit 510 is free
>  EraseMark not present in unit 511: 0

The DoC is not properly nftl_formatted, or the OOB areas are broken
or not correctly accessed by doc2000.c

Ollie


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Re: DOC2000 & NFTL problems

[Ciro Cattuto]

On Fri, Aug 04, 2000 at 09:54:53AM +0800, Ollie Lho wrote:

> The DoC is not properly nftl_formatted, or the OOB areas are broken
> or not correctly accessed by doc2000.c

That's what I thought. The point is, which one of the above?

The DOC2000 shouldn't be broken, because I can use it without the least
problem under DOS _and_ under Linux 2.0.38, with the binary module provided
by M-systems (or IGEL, whatever). I will re-try all of this, just to be sure.
But given this, what could possibly go wrong with the way doc2000.c accesses
OOB areas? This SBC is a common PC104 board manufactured by Eurotech.
It features a 386SX, 2 Mb RAM (yes, I'm running Linux in 2 Mb of RAM)
and a DOC socket, besides many other devices. It's pretty standard stuff.

I'm confused...

Thank you for you help/hints/whatever :)

Ciro

-- 
Ciro Cattuto, Open Source Developer, Linuxcare Italia SpA
Tel. +39.338.3002140  Fax +39.049.8036484 
ciro@linuxcare.com    http://www.linuxcare.com/
ciro@prosa.it         http://www.prosa.it/
Linuxcare. Support for the revolution.




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Re: DOC2000 & NFTL problems

[David Woodhouse]

ollie@sis.com.tw said:
>  EraseMark not present in unit 511: 0
> The DoC is not properly nftl_formatted, or the OOB areas are broken or
> not correctly accessed by doc2000.c

... or setting the EraseMark to zero means it's a bad block, and we don't 
handle bad blocks yet. That's unlikely, though, given the number of times 
it's happening.

--
dwmw2




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