I made daughter board with 2k NAND Flash (Samsung K9K4G08U0M) for
STAMP board (http://blackfin.uclinux.org/projects/stamp). There is
uClinux for this platform
(http://blackfin.uclinux.org/projects/uclinux533). YAFFS2 work
successful after some patches. Authors only debug YAFFS2 for NAND 2K
emulator apparently. The file yaffs_mtdif2.c must be reworked for
correct work with real chip. It has a problem with store TAGS on spare
area of the page. Now I`m testing YAFFS2 on my flash.

P.S. sorry for my english