[U-Boot-Users] NAND flash support

[Ladislav Michl <ladis@linux-mips.org>]

On Tue, Nov 01, 2005 at 09:46:33AM +0200, Mike Rapoport wrote:
> On 10/31/05, Wolfgang Denk <wd@denx.de> wrote:
> > The #testing-NAND branch ofthe U-Boot GIT repository contains a major
> > rewrite of NAND support. Unfortunately we  don't  make  any  progress
> > with  merging  it  into  the  main  branch because nobody seems to be
> > testing or using it.
> >
> 
> I've been trying to use the new NAND code on custom board based on
> MPC8272 with Samsung 128Mb NAND chip (K9K1G08U0M). So far I had no
> problems with read/dump functionality.
> I've implemented the nand_erase wrapper in the include/nand.h and
> after restoring the most of nand_wait in drivers/nand/nand_base.c the
> erase worked for me.

Could you please provide a patch?

> The only thing that I haven't succeeded to enable is the write. When I
> try to write relatively large chunks of data, there is a bus fault
> just after I see the message
> "NAND write: device 0 offset 0, size 1048576 ... 1048576 bytes written: OK".
> Besides, the blocks that were written are marked bad.
> 
> The relevant parts of my board configuration are:
> #define CFG_MAX_NAND_DEVICE 1
> #define CFG_NAND_BASE	0xff000000
> #define CONFIG_NEW_NAND_CODE	1
> #define CONFIG_MTD_DEBUG 1
> #define CONFIG_MTD_DEBUG_VERBOSE	1
> 
> The functions for HW access are the same as I use in Linux mtd driver
> which works fine.

What version of MTD code are you using in your Linux kernel? I'm just
updating U-Boot code to be based on what's contained in 2.6.14, which
_may_ address some problems people were reporting before. I hope to get
time to send update next week.

Thanks,
	ladis