Download Linux-Demo from
	http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3933
Flash dataflash-version into dataflash
boot board

////////////////////////
uboot
////////////////////////
set ethaddr 02:02:02:04:08:10
set ipaddr 192.168.2.38
set serverip 192.168.2.34
saveenv

////////////////////////
build new kernel
////////////////////////

download compiler-package from gnuarm.org
set path to gnuarm-compiler

Download linux2.6.20 source
download at91-patch
download experimental patch
patch -p1 < at91
patch -p1 < experimental
make ARCH=arm CROSS_COMPILE=arm-elf- menuconfig
	select alternative konfiguration and select
		arch/arm/configs/at91sam9260ek_defconfig
	enable
		device driver: davidcom phy support 
		network support: macb support
		device driver: mmc support
exit, save
make ARCH=arm CROSS_COMPILE=arm-elf-

in arch/arm/boot/ will be the new zImage
old filesystem from atmel-demo is fine


FIX:

"Disable multiple writes in mmc_block.c by setting number of block always to 1." 

If I remember correctly I also had some trouble getting the fix to work cleanly.
The fix for this problem in the driver makes writes to SD/MMC slow.
We gave up on sd/mmc support and opted for a bigger nand flash instead.

Someone at Atmel told me that they were working on a new driver but that they still had problems. I haven't heard from them since then.

Here's the fix:

if (rq_data_dir(req) != READ &&
!(card->host->caps & MMC_CAP_MULTIWRITE) &&
!mmc_card_sd(card))
brq.data.blocks = 1;

if (rq_data_dir(req) != READ){
//printk("*** no multi blocks *** \n");
brq.data.blocks = 1;
}

if (brq.data.blocks > 1) {
brq.data.flags |= MMC_DATA_MULTI;
brq.mrq.stop = &brq.stop;
readcmd = MMC_READ_MULTIPLE_BLOCK;

BTW we also gave up on the at91 twi controller and inserted an external i2c controller on our board.

Hope this helps.








/////////////////////////
setup tftp server
////////////////////////
setup tftp server and add zImage and rootfs to directory

////////////////////////
uboot
////////////////////////
setenv bootcmd 'tftp 0x21500000 zImage; tftp 0x21100000 rootfs; go 0x21500000'
saveenv
boot

////////////////////////
activate ethernet
////////////////////////
ifconfig eth0 192.168.2.38
udhcpc

////////////////////////
 mknod for mmc
////////////////////////
  mknod /dev/mmc b 254 0 0
  mknod /dev/mmc1 b 254 0 1
  
////////////////////////////////////////////////////////////////////////
cross-compiler-tool-chain
////////////////////////////////////////////////////////////////////////
download http://kegel.com/crosstool/ and run arm-demo.sh (not as root!);
unset ld_library_path before. (export LD_LIBRARY_PATH=)
install "bison"
install "flex"

compilationfix:
mkdir ./build/arm-unknown-linux-gnu/gcc-4.1.0-glibc-2.3.2/build-glibc/csu/
cd ./build/arm-unknown-linux-gnu/gcc-4.1.0-glibc-2.3.2/build-glibc/csu/
touch version-info.h
chmod 444 version-info.h