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/<board>.h. Now all those files seems to be empty.)
Q>>Why does the wrong magic on /dev/env0 happen? How to correct this?
Q>> How can I store uImage and the rootfilesystem on the NAND? Are there any
commands for this?
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
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
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?
Q>> How to enable GDB support in uboot?
Thanks and regards,
Tiju
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