How to use EP8260 MTD device?

[Steven Blakeslee]

It looks like you are using the MTD with the onboard FLASH.  I noticed you
have "CONFIG_MTD_PHYSMAP_BUSWIDTH=2", the FLASH on the ep8260 is a 64bit
bus, wouldn't that mean this should be a "CONFIG_MTD_PHYSMAP_BUSWIDTH=4".

Also, there are more configurations you can make, particularly for FLASH.
You should use make menuconfig and look at the other options.

Lastly, there is mention of MTD for the RPX LITE and CLLF boards.  These
have the same FLASH but a 32 bit bus, you may be able to modify this support
to include 64 bit for the ep8260.

-----Original Message-----
From: OHMURA Yutaka [mailto:ohmura at co-nss.co.jp]
Sent: Friday, January 31, 2003 8:40 AM
To: linuxppc-embedded at lists.linuxppc.org
Subject: Re: How to use EP8260 MTD device?



Hi,

In this ML, no one uses EP8260?
Or TSL(2.4.7 base)?

I changed my .config as follows, but still not work.
> # Memory Technology Devices (MTD)
> CONFIG_MTD=y
> CONFIG_MTD_DEBUG=y
> CONFIG_MTD_DEBUG_VERBOSE=3
> CONFIG_MTD_PARTITIONS=y
> CONFIG_MTD_CHAR=y
> CONFIG_MTD_BLOCK=y
> CONFIG_FTL=y
>
> # RAM/ROM/Flash chip drivers
> CONFIG_MTD_CFI=y
> CONFIG_MTD_GEN_PROBE=y
> CONFIG_MTD_CFI_AMDSTD=y
>
> # Mapping drivers for chip access
> CONFIG_MTD_PHYSMAP=y
> CONFIG_MTD_PHYSMAP_START=FF000000
> CONFIG_MTD_PHYSMAP_LEN=FFFFFF
> CONFIG_MTD_PHYSMAP_BUSWIDTH=2

By the way, TSL uses DEC register for timer, is this same in pure PPC-Linux?
I could't find pure PPC-Linux 2.4.7 source code...

Regards,

Yutaka

OHMURA Yutaka <ohmura at co-nss.co.jp> wrote:

>
> Hello,
>
> Now I'm trying to use Embedded Planet 8260 board Flash memory with TimeSys
> Linux 3.1(TSL). I have two type of this board. One has 200MHz clock, have
RTC,
> 64MB PSDRAM, 32MB LSDRAM and 16MB Flash ROM. The other has 300MHz clock,
> no RTC, 32MB PSDRAM and 8MB Flash ROM. My goal is use MTD device under TSL
with
> 300MHz MPU board, but the board looks some other difference with 200MHz
board,
> so TSL can't works fine, so at first I'm trying to use MTD device with
200MHz
> board. But I can't use MTD until now.
> In now situation, /dev/mtd and /dev/mtdblock are normal directory and
there are
> nothing under the directory.
>
> Please tell me how to use MTD on EP8260 under TSL!
>
> Here is my .config
> > # Memory Technology Devices (MTD)
> > CONFIG_MTD=y
> > CONFIG_MTD_DEBUG=y
> > CONFIG_MTD_DEBUG_VERBOSE=3
> > CONFIG_MTD_PARTITIONS=y
> > CONFIG_MTD_CHAR=y
> > CONFIG_MTD_BLOCK=y
> > CONFIG_FTL=y
>
> > # RAM/ROM/Flash chip drivers
> > CONFIG_MTD_CFI=y
> > CONFIG_MTD_JEDECPROBE=y
> > CONFIG_MTD_GEN_PROBE=y
> > CONFIG_MTD_CFI_AMDSTD=y	<-On board Flash memory looks AMD
> 				  chip but the print faint so I
> 				  can't read chip type
> > CONFIG_MTD_CFI_AMDSTD=y
> > CONFIG_MTD_OBSOLETE_CHIPS=y
> > CONFIG_MTD_AMDSTD=y
>
> > # Mapping drivers for chip access
> > CONFIG_MTD_PHYSMAP=y
> > CONFIG_MTD_PHYSMAP_START=FF800000	<-adjusting to 300MHz board
> > CONFIG_MTD_PHYSMAP_LEN=70000000	  I hope 200MHz board can work with
> 					  this parameter
> > CONFIG_MTD_PHYSMAP_BUSWIDTH=2
> other MTD parameters are not set
>
> Under this environment, MTD driver says
> > physmap flash device: 6ffffc at ff800000
> > CFI: Found no Physically mapped flash device at location zero
> > RPX Lite or CLLF flash device: 2000000 at fe000000
> > CFI: Found no RPX device at location zero
> > $Id: ftl.c,v 1.38 2001/09/23 21:15:12 dwmw2 Exp $
>
> This is first time to use MTD for me, so if you know good reference to use
it,
> please tell me too.
> /usr/src/timesys/ep8260/2.4.7-timesys-3.1.180/kernel/Documents was not
help me.
>
> Regards,
>
> Yutaka
>
>


_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
OHMURA, Yutaka <ohmura at co-nss.co.jp>
  Nissin Systems co.,ltd.
  (Phone) +81-75-344-7950  (FAX) +81-75-344-7888
   Ayakoji, Horikawa street, Shimogyo-ku, KYOTO, JAPAN
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/


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