Hi Martin,
I have tried to create a jffs2-image of the linux-filesystem I wish to use, and then write it to my flash using "nand write.jffs2 100000 0 $(filesize)". But with no luck... Then I began to investigate the fundamental "ls" and "nand erase" commands, but neither there did I have any success. Below is a trace of what I've tried in order to get something working.
In section 2, I'd expect the nand to be mountable from Linux - but's it's not. In section 3, I'd expect the filesystem to be ls'ed correct from u-boot - but it's not...
Can someone tell me if there is something I've misunderstood?
********** 1 U-Boot ************
U-Boot 1.1.2 (Nov 27 2004 - 11:50:10) CPU: IBM PowerPC 405EP Rev. B at 333.333 MHz (PLB=111, OPB=55, EBC=37 MHz)
==== 8< 8< 8< ====
NAND:Probing at 0xff400000 64 MB
==== 8< 8< 8< ====
=> nand erase clean
NAND erase: device 0 offset 0, size 67108864 ... OK
=> ls Scanning JFFS2 FS: done. =>
********** 2 Linux ************
Which Linux kernel with which mtd code version?
# cat /proc/mtd
dev: size erasesize name mtd0: 04000000 00004000 "Trampoline Nand Flash (128 MB)"
# mount -t jffs2 /dev/mtdblock0 mnt/nand0
jffs2: Erase block size too small (16KiB). Using virtual blocks size (32KiB) instead Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes empty_blocks 1325, bad_blocks 4, c->nr_blocks 2048 mount: Mounting /dev/mtdblock0 on /mnt/nand0 failed: Invalid argument
# eraseall /dev/mtd0
Use -j (--jffs2) in the future.
Erasingnand_erase: attempt to erase a bad block at p 16 Kibyte @ 400age 0x00000020 0 -- 0 % complenand_erase: attempt to erase te. eraseall: /a bad block at page 0x00000040 dev/mtd0: MTD Ernand_erase: attempt to erasase failure: Inpe a bad block at page 0x00000060 nand_erase: attempt to erase a bad blo Erasing 16 Kibck at page 0x00000080 yte @ 8000 -- 0nand_erase: attempt to er % complete. erase a bad block at page 0x000000a0 aseall: /dev/mtd0: MTD Erase fainalure: Input/outpnd_erase: attempt to erase a b ad block at page 0x000000c0 ut error Erasinand_erng 16 Kibyte @ case: attempt to erase a bad block at page 0x000000e0 000 -- 0 % complete. eraseall: /dev/mtd0: MTD Erase failure: Input/output error Erasing 16 Kibyte @ 10000 -- 0 % complete. eraseall: /dev/mtd0: MTD Erase failure: Input/output error Erasing 16 Kibyte @ 14000 -- 0 % complete. eraseall: /dev/mtd0: MTD Erase failure: Input/output error Erasing 16 Kibyte @ 18000 -- 0 % complete. eraseall: /dev/mtd0: MTD Erase failure: Input/output error Erasing 16 Kibyte @ 1c000 -- 0 % complete. eraseall: /dev/mtd0: MTD Erase failure: Input/output error Erased 65536 Kibyte @ 0 -- 100% complete.
Might be caused be eraseall without -j ignoring bad blocks but I'm not sure.
# mount -t jffs2 /dev/mtdblock0 /mnt/nand0/
jffs2: Erase block size too small (16KiB). Using virtual blocks size (32KiB) instead
# touch /mnt/nand0/testfile # mkdir /mnt/nand0/testdir # umount /mnt/nand0
jffs2: No clean, dirty _or_ erasable blocks to GC from! Where are they all? jffs2: Couldn't find erase block to garbage collect!
Thats just a warning and can be ignored - iirc it means the unmount triggered a garbage collection which found nothing to collect.
# mount -t jffs2 /dev/mtdblock0 /mnt/nand0/
jffs2: Erase block size too small (16KiB). Using virtual blocks size (32KiB) instead
# ls -l /mnt/nand0/ drwxr-xr-x 2 0 0 0 Feb 8 05:59 testdir -rw-r--r-- 1 0 0 0 Feb 8 05:59 testfile
********** 3 U-Boot ************
=> ls Scanning JFFS2 FS: done. =>
This should definitely work (it worked for me on 8xx and 4xx in the past).
Check the mtd code in your Linux version - many improvements related to NAND went in there not long ago.
Cheers Detlev