flash writing with Linux
Wolfgang Denk
wd at denx.de
Fri Mar 16 21:37:05 EST 2001
In message <3AB1E380.7E88EC47 at esd-electronics.com> you wrote:
>
> does anybody know if a flash writing tool for Linux is available ?
Which architecture, what type of flash?
> I want to update a flash image from a running Linux. The Linux is
> running from a ramdisk, so the flash can be erased and rewritten.
Yepp, that's what we do all the time.
> I think what I need are two thing: A device driver for accessing the
> flash and a command line tool for erasing and writing to the flash.
Please check the Patch "patch.drivers" (against PPC 2.4.3-pre3 tree)
in ftp://ftp.denx.de/pub/LinuxPPC/usr/src/patches/ or have a look at
our source snapshot at
ftp://ftp.denx.de/pub/LinuxPPC/usr/src/linux-2.4.3-pre3-2001-03-11.tar.bz2
It includes a character device driver for CFI (AMD chips) and JEDEC
(Intel chips) compliant flash types. So far, this has been tested on
big-endian systems (PowerPC only), but I would be interested in
receiving feedback for other architectures as well.
Of course there are also user utilities to erase the flash. For
writing no special tool is needed - just copy to the device (in fact,
if your write block size is a multiple of the erase block size of the
chips the driver performs an auto-erase, so you don't need the
flash_erase command either).
Hope this helps - feel free to ask if there are any question or
problems.
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
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the answer can be obtained by simple inspection.
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