The attached patch adds support for the AT91RM9200 NAND (Smartmedia) controller, allowing use of the U-Boot NAND commands on AT91RM9200-based boards which use NAND flash.

It uses four CFG parameters:

CFG_NAND_BASE - address of Smartmedia chip select (normally 0x40000000) CFG_NAND_AT91_CLE_BIT - address bit number used to set CLE signal CFG_NAND_AT91_ALE_BIT - address bit number used to set ALE signal CFG_NAND_CHIP_DELAY - command delay time in microseconds

I have been using this code for almost a year with no problems on our custom AT91RM9200 board. I believe it would be useful for others as the popularity of NAND flash increases.

Regards, ../fam