Hi Tiju,
Sorry, I overlooked your mail :(
On Tue, Sep 23, 2008 at 09:32:17PM +0530, Tiju wrote:
>
> Hi Sascha,
> >
> >
> > > > > > > > 2. Is it possible to do a NAND boot on i.mx27ads board with
> > > > > > > > uboot?
> > If so how can I do it?
> > > > > > >
> > > > > > > NAND support (including booting from NAND) has been tested on the
> > > > > > > phycore i.MX27 module. So the NAND driver inself is in place,
> > > > > > > only the
> > > > > > > board specific bits are missing.. You can use board/pcm038 as a
> > template.
> > > >
> > > > 1. Which nand is used on the pcm038 board(vendor, pagesize, bus width)?
> > > It's a NAND device: Manufacturer ID: 0x20, Chip ID: 0x36 (ST Micro NAND
> > > 64MiB
> > 1,8V 8-bit)
> > >
> > > > 2. Can modify these drivers for the mx27ads which has a samsung, x8,
> > > > 512byte
> >
> > > page, 1Gb... or I have to integrate it totally from scartch?
> > >
> > > It should work in principle. All you have to do is to find the bugs ;)
> > > I tried it once on my mx27ads but had no luck, but I didn't investigate
> >
> > I modified the imx27ads/* for nand boot as in pcm038 and the
> > drivers/nand/nand_base.c *maf_id and dev_id. Then it boots succesfully for
> > the
> > Samsung NAND on the ADS board.
> >
> >
> > U-Boot 2.0.0-rc5-git (Sep 23 2008 - 11:14:46)
> > Board: Freescale i.MX27 ADS
> > NAND device: Manufacturer ID: 0xec, Chip ID: 0x79 (Samsung NAND 128MiB 3,3V
> > 8-bit)
> > Scanning device for bad blocks
> > Bad eraseblock 6037 at 0x05e54000
> > Using environment in NAND Flash
> > chip id: [1,882,1,01d]
> > mpll: 398998U-Boot 2.0.0-rc5-git (Sep 23 2008 - 11:14:46)
> > envfs: wrong magic on /dev/env0
> > 000 Hz
> > spll: 240000000 Hz
> > arm: 132999333 Hz
> > perclk1: 66499666 Hz
> > perclk2: 66499666 Hz
> > perclk3: 66499666 Hz
> > perclk4: 66499666 Hz
> > clkin26: 26000000 Hz
> > ahb: 66499666 Hz
> > ipg: 33249833 Hz
> > Malloc space: 0xa7b00000 -> 0xa7f00000 (size 4 MB)
> > Stack space : 0xa7af8000 -> 0xa7b00000 (size 32 kB)
> > envfs: wrong magic on /dev/env0
> > Q>> Where can I specify my NAND/NOR/RAM details(size, sectors...) so that I
> > can
> > alter the configuration files. (In the previous version it was
> > include/config/.h. Now all those files seems to be empty.)
> >
>
> Q>>Why does the wrong magic on /dev/env0 happen? How to correct this?
It is because you haven't saved any environment there. Try saveenv - it
saves the contents of /env to the area you specified as environment.
>
>
> Q>> How can I store uImage and the rootfilesystem on the NAND? Are there any
> commands for this?
See board/pcm038/env for a starting point. Basically you first have to
create some partitions on dev/nand0 using addpart:
uboot> addpart /dev/nand0 256k(uboot),128k(env),2048k(kernel),-(rootfs)
Then you can put bad block aware devices ontop of the partitions:
uboot> nand -a /dev/nand0.*
This should give you a /dev/nand0.kernel.bb device where you can use
erase/tftpboot on:
uboot> erase /dev/nand0.kernel.bb
uboot> tftp uImage-mx27ads /dev/nand0.kernel.bb
uboot> bootm /dev/nand0.kernel.bb
>
> >
> > I make a uImage with the following commands.
> > #/opt/OSELAS.Toolchain-1.1.1/arm-v4t-linux-gnueabi/gcc-4.1.2-glibc-2.5-kernel-2.6.18/bin/arm-v4t-linux-gnueabi-objcopy
> >
> > -O binary -R .note -R .comment -S vmlinux linux.bin
> > #gzip -9 linux.bin
> > #mkimage -A arm -O linux -T kernel -C gzip -a 0xA0008000 -e 0xA0008000 -n
> > "Linux
> > kernel image" -d linux.bin.gz uImage
Use the 'make uImage' command to compile your kernel. It will do the
right thing.
> >
> > Once the boot happens the following error messages come:
> >
> > Hit any key to stop autoboot: 3 2 1
> > phy0: Link is up - 100/Full
> > TFTP from server 199.63.38.20; our IP address is 199.63.38.113
> > Filename 'uImage'.
> > Loading: *#################################################################
> > ###############################T ###############################T ###
> > ########################################error frame: 0xa7b02468
> >0x00000884
> > T ########################T error frame: 0xa7b02480 0x00000804
> > T ##############T T ####################################################
> > ######################error frame: 0xa7b023c0 0x00000890
> > T #############error frame: 0xa7b02318 0x00000884
> > T #error frame: 0xa7b02498 0x00000890
error frame? That doesn't look good. I do not have this problem on my
board. Sorry, I can't give you advice here, you'll have to investigate.
You can try different switches or a crossover cable. Maybe it behaves
different and gives us a hint what goes wrong here.
> > T ########################
> > done
> > Bytes transferred = 1634718 (18f19e hex)
> > Image Name: Linux kernel image
> > Created: 2008-09-23 6:50:16 UTC
> > Data Size: 1634654 Bytes = 1.6 MB
> > Load Address: a0008000
> > Entry Point: a0008000
> > OK
> > commandline: console=ttymxc0,115200
> > ip=199.63.38.113:199.63.38.20:199.63.38.1:255.255.255.0:::
> > root=/dev/nfs nfsroot=199.63.38.20:/tftpboot/ltib,v3,tcp
> > mtdparts=physmap-flash.0:256k(uboot)ro,128k(ubootenv),1536k(kernel),-(root);
> > imx_nand:256k(uboot)ro,128k(ubootenv),1536k(kernel),-(root)
> > arch_number: 846
> > Unimplemented compression type 1
> > handler returned!
> > uboot:/
>
> Q>> Why is the tftp download breaking?
> >
> > Q>>I compress the linux image using gzip. Does'nt this version of uboot
> > support
> > gzip (because it says unimplemented compression type) or am I missing out
> > something here?
make menuconfig -> commands -> booting -> bootm -> bootm with zlib support
Anyway, if you use make uImage in the Linux kernel you won't need zlib
support in U-Boot. This target generates an uImage from a zImage.
>
> I had not included the zlib support.. Once included the linux boots through
> tftp and nfs.
>
> >
> Q>> How to enable GDB support in uboot?
By implementing it ;) Sorry, there is no gdb support at the moment.
Regards,
Sascha
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