For using jffs2 following are the instructions,

for creating jffs2 image

mkfs.jffs2 --eraseblock=blocksize --pad=pagesize --no-cleanmarkers -d
rootdirectory -o imagename

example
mkfs.jffs2 --eraseblock=0x20000 --pad=2048 --no-cleanmarkers -d
$HOME/work -o jffs2_nand


Erasing flash partition use
#flash_eraseall -j /dev/mtdX

Burning the image

#nandwrite /dev/mtdX jffs2_nand

And mount the partition using
mount -t jffs2 /dev/mtdblockX /mnt


So there is difference in procedure for jffs2 and yaffs2

Nobin Mathew

On 7/11/07, Bryan Wu <bryan.wu@analog.com> wrote:
> On Wed, 2007-07-11 at 13:42 +0530, Nobin Mathew wrote:
> > What all YAFFS2 options are enabled in the kernel.
> > Can you try disabling the autoselect.
> >
>
> Here is my config
>
> ---
> CONFIG_YAFFS_FS=y
> CONFIG_YAFFS_YAFFS1=y
> # CONFIG_YAFFS_DOES_ECC is not set
> CONFIG_YAFFS_YAFFS2=y
> # CONFIG_YAFFS_AUTO_YAFFS2 is not set
> # CONFIG_YAFFS_DISABLE_LAZY_LOAD is not set
> CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS=10
> # CONFIG_YAFFS_DISABLE_WIDE_TNODES is not set
> # CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED is not set
> # CONFIG_YAFFS_SHORT_NAMES_IN_RAM is not set
> ---
>
> > Can you check the page size the driver returns.
> >
> > If you are developing a new driver then you first try jffs2.
> >
>
> can I use nandwrite to program the jffs2 image to nand flash chip?
> nandwrite -a -o /dev/mtdX jffs2_image
>
> Could you please help me to use the mkfs.jffs2 for make a jffs2 image?
>
> #mkfs.jffs2 -s 2KiB -e 128KiB -n -d rootfs -o rootfs.jffs2
> the file size of rootfs.jffs2 will be 88Mbytes, while
>
> #mkfs.jffs2 -e 128KiB -n -d rootfs -o rootfs.jffs2
> file size is 1.6Mbytes
>
> Did I miss something?
>
> Thanks a lot for your help.
>
> - Bryan Wu
> > That is much more stable, and then we will come back to YAFFS2.
> >
> > In my case i also developed a nand controller driver. and it was
> > working perfectly with above mentioned options with YAFFS2.
> >
> > Nobin Mathew
> >
> > On 7/11/07, Bryan Wu <bryan.wu@analog.com> wrote:
> > > On Wed, 2007-07-11 at 12:29 +0530, Nobin Mathew wrote:
> > > > Which is your NAND chip?
> > > >
> > > NAND device: Manufacturer ID: 0x20, Chip ID: 0xda (ST Micro NAND 256MiB
> > > 3,3V 8-bit)
> > >
> > > > Is it 2k page chip?
> > >
> > > yes, it is.
> > > >
> > > > Then use
> > > > #flash_eraseall /dev/mtdX
> > > > #nandwrite -a -o /dev/mtdX yaffs2_image
> > > > #mount -t yaffs2 /dev/mtdblockX /mnt
> > > >
> > >
> > > Here is the command log on my board:
> > > ---
> > > root:~> flash_eraseall /dev/mtd2
> > > Erasing 128 Kibyte @ fbe0000 -- 99 % complete.
> > > root:~>
> > > root:~>
> > > root:~> nandwrite -a -o /dev/mtd2 rootfs.yaffs2
> > > Writing data to block 0
> > > Writing data to block 20000
> > > Writing data to block 40000
> > > Writing data to block 60000
> > > Writing data to block 80000
> > > Writing data to block a0000
> > > Writing data to block c0000
> > > Writing data to block e0000
> > > Writing data to block 100000
> > > Writing data to block 120000
> > > Writing data to block 140000
> > > Writing data to block 160000
> > > Writing data to block 180000
> > > Writing data to block 1a0000
> > > Writing data to block 1c0000
> > > Writing data to block 1e0000
> > > Writing data to block 200000
> > > Writing data to block 220000
> > > Writing data to block 240000
> > > Writing data to block 260000
> > > Writing data to block 280000
> > > Writing data to block 2a0000
> > > Writing data to block 2c0000
> > > Writing data to block 2e0000
> > > root:~> mount -t yaffs /dev/mtdblock2 /mnt/
> > > yaffs: dev is 32505858 name is "mtdblock2"
> > > yaffs: Attempting MTD mount on 31.2, "mtdblock2"
> > > yaffs: auto selecting yaffs2
> > > root:~> cd /mnt/
> > > root:/mnt> ls
> > > lost+found
> > > root:/mnt>
> > > root:/mnt> cat /proc/yaffs
> > > YAFFS built:Jul 11 2007 15:32:43
> > > $Id: yaffs_fs.c 2682 2007-01-22 03:19:29Z aubrey $
> > > $Id: yaffs_guts.c 2682 2007-01-22 03:19:29Z aubrey $
> > >
> > > Device 0 "File System"
> > > startBlock......... 0
> > > endBlock........... 2015
> > > chunkGroupBits..... 1
> > > chunkGroupSize..... 2
> > > nErasedBlocks...... 1992
> > > nTnodesCreated..... 300
> > > nFreeTnodes........ 35
> > > nObjectsCreated.... 600
> > > nFreeObjects....... 29
> > > nFreeChunks........ 127542
> > > nPageWrites........ 0
> > > nPageReads......... 0
> > > nBlockErasures..... 0
> > > nGCCopies.......... 0
> > > garbageCollections. 0
> > > passiveGCs......... 0
> > > nRetriedWrites..... 0
> > > nRetireBlocks...... 0
> > > eccFixed........... 0
> > > eccUnfixed......... 0
> > > tagsEccFixed....... 0
> > > tagsEccUnfixed..... 0
> > > cacheHits.......... 0
> > > nDeletedFiles...... 0
> > > nUnlinkedFiles..... 0
> > > nBackgroudDeletions 0
> > > useNANDECC......... 1
> > > isYaffs2........... 1
> > > ---
> > >
> > > The rootfs.yaffs2 is made by mkyaffs2image tool from a rootfs dir.
> > > Why there is no rootfs subdirs such as bin/ lib/ etc/ ...?
> > >
> > > Thanks
> > > - Bryan Wu
> > >
> > > > Nobin Mathew
> > > >
> > > > On 7/11/07, Bryan Wu <bryan.wu@analog.com> wrote:
> > > > > On Wed, 2007-07-11 at 12:07 +0530, Nobin Mathew wrote:
> > > > > > This is the link to yaffs2 source
> > > > > > http://www.aleph1.co.uk/cgi-bin/viewcvs.cgi/yaffs2/
> > > > >
> > > > > Yeah, I got this source. But there is no mkyaffs
> > > > > >
> > > > > > You can use flash_eraseall and nandwrite tools from mtd_utils
> > > > >
> > > > > I am not sure my method, please help me to point out some wrong:
> > > > > $ flash_eraseall /dev/mtd2
> > > > > $ nandwrite -y -p /dev/mtd2 rootfs.yaffs2
> > > > >
> > > > > right?
> > > > >
> > > > > I use mkyaffs as this:
> > > > >
> > > > > $ eraseall /dev/mtd2    /* old mtd-utils provide eraseall */
> > > > > $ mkyaffs -e /dev/mtd2
> > > > > $ mount -t yaffs /dev/mtdblock2 /mnt
> > > > > $ cp "necessary files" /mnt
> > > > > $ umount /mnt
> > > > >
> > > > > Then I can reboot my board mounting /dev/mtdblock2 yaffs2 as rootfs.
> > > > >
> > > > > Thanks
> > > > > - Bryan Wu
> > > > >
> > > > > >
> > > > > > On 7/11/07, Bryan Wu <bryan.wu@analog.com> wrote:
> > > > > > > Hi folks,
> > > > > > >
> > > > > > > I am developing Blackfin NAND Flash Controller driver.
> > > > > > >
> > > > > > > YAFFS2 should be OK on our platform. I can't found the mkyaffs tool in
> > > > > > > the CVS now, how can I format a NAND partition as YAFFS2 without mkyaffs
> > > > > > > tool?
> > > > > > >
> > > > > > > Thanks
> > > > > > > - Bryan Wu
> > > > > > >
> > > > > > > _______________________________________________
> > > > > > > yaffs mailing list
> > > > > > > yaffs@lists.aleph1.co.uk
> > > > > > > http://lists.aleph1.co.uk/cgi-bin/mailman/listinfo/yaffs
> > > > > > >
> > > > >
> > >
>