OneNAND on PXA-270?

[Kyungmin Park <kyungmin.park@samsung.com>]

Hi,

> We're evaluating the Samsung OneNAND to replace the NAND and NOR chips in
> our PXA-270-based device.  We're using 2.6.18 and it looks like the MTD
> drivers are there, and we understand a little about x-loader and u-boot
> sharing the first 128K block.  Does anyone have experience booting Linux
> from the OneNAND on a PXA machine?  Specifically, we're interested in:

> 1) flashing the OneNAND over JTAG (we use Abatron bdi-2000)

As I know, bdi can't program onenand directly.

> 2) how to modify u-boot, if needed, to be entered by x-load

Just use your u-boot, we only need a xloader

After build xloader, just merge two image xloader + uboot.
Of course, you can find merge script in xloader scripts directory.

> 3) JFFS2 performance, funky mkfs parameters/caveats

In our test environment, apollon based on omap2420 with latest mtd tree

warning: process `iozone' used the removed sysctl system call
        Iozone: Performance Test of File I/O
                Version $Revision: 3.260 $
                Compiled for 32 bit mode.
                Build: linux-arm

        Run began: Thu Nov  9 08:31:37 2006

        Auto Mode 2. This option is obsolete. Use -az -i0 -i1
        File size set to 30720 KB
        Command line used: iozone -A -s 30m -U /jffs2 -f /jffs2/test
        Output is in Kbytes/sec
        Time Resolution = 0.000030 seconds.
        Processor cache size set to 1024 Kbytes.
        Processor cache line size set to 32 bytes.
        File stride size set to 17 * record size.

              KB  reclen   write rewrite    read    reread
           30720       4    4738    4787     8535    15577
           30720       8    5414    4771    15776    15706
           30720      16    4803    6009    15832    15844
           30720      32    4793    4805     8623    15913
           30720      64    5438    4810    16050    16011
           30720     128    4856    6204    16195    16174
           30720     256    4838    4881     8657    16253

> The version of x-load that I found online has support for three OMAP
> boards and no cpu/pxa folder (which I assume is taken straight from
> u-boot).  Can someone send source for x-load adopted to their pxa machine?

you can find pxa support here.

http://source.mvista.com/git/gitweb.cgi?p=xloader.git;a=log

refer to i580 board which is based on pxa270.

Thank you,
Kyungmin Park