[U-Boot-Users] Flash vs DataFlash vs NAND Flash

[Matt Gessner]

Um... I wasn't aware that an earlier version of u-boot would have better
support than 1.2.0.

I'll check into it.

One of the reasons I wanted 1.2.0 was that it had NAND flash support for
very large NAND flash devices.

I'll check it out.

Matt

> -----Original Message-----
> From: Ulf Samuelsson [mailto:ulf at atmel.com]
> Sent: Thursday, March 22, 2007 6:40 PM
> To: Jerry Van Baren; Matt Gessner
> Cc: u-boot-users at lists.sourceforge.net
> Subject: Re: [U-Boot-Users] Flash vs DataFlash vs NAND Flash
> 
> > Matt Gessner wrote:
> >> Hi, all,
> >>
> >> On my AT91RM9200 board, I have an Atmel DataFlash for booting off
my
> >> SPI, and I have a NAND flash.
> >>
> >> I do not, however, have any other kind of flash.
> >>
> >> My 128K DataFlash address is 0xc0000000, and my 128MB of RAM is at
> >> 0x20000000.
> >>
> >> When I do
> >>
> >> cp.b 20200000 c0000000 2c60
> >>
> >> Copy to DataFlash... done
> >>
> >> it works just fine.
> >>
> >> When I do
> >>
> >> cp.b c0000000 20200000 2c60
> >>
> >> the system crashes with a data abort, but before the crash, it
reports
> >>
> >> Copy to Flash...
> >>
> >> Well, I'm quite confused how to set the various flash flags to make
all
> >> this work.
> >>
> >> If I try to set CFG_NO_FLASH, the system won't compile.
> >>
> >> But there is no "conventional" flash on the board... just the nand
> >> (8-bit port) and dataflash (spi).
> >>
> >> Would someone kindly point me to a reference that explains how I
can
> set
> >> up u-boot 1.2.0 to make this work?  Or just come straight out and
tell
> >> me?
> >>
> 
> 
> Why not use U-Boot 1.1.5 from
> ftp://at91dist:distrib@81.80.104.162/U-Boot-1.1.5   ?
> That has probably got later patches for the AT91RM9200 than 1.2.0
> 
> Best Regards
> Ulf Samuelsson