J.C. Wren wrote:
I see references to 'nand write.yaffs2' which looks like it might do what I want, but that seems to be non-existent. Was this replaced by something else?
It's not yet supported in mainline. There have been some patches floating around, but none has been formally submitted for merging.
See: http://git.denx.de/?p=u-boot/u-boot-blackfin.git;a=commitdiff;h=44f07de8cc94...
All the solutions that don't involve 'nand write.yaffs2' involve booting to Linux and mounting /dev/mtdblockX... Which doesn't really work when you don't a root filesystem (No Ethernet, USB doesn't work right yet (can't get a kernel to recognize the USB pen drive, although u-boot does quite nicely).
You could try using an initrd/initramfs (attached to the kernel image, or loaded by u-boot) which includes the image to be written.
Or you could try using jffs2 to bootstrap things.
Or fix USB. :-)
-Scott