How to compile modules for E series from kernel sources

[juusso]

Temporal place for some short howto, requested by yepp.

First you may need to install xz-utils to extract archive.

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apt-get instal xz-utils

1. download required toolchain from SamyGO downloads (http://download.samygo.tv/Toolchains/VD ... 630.tar.xz) and extract it to /opt dir.
I renamed folder to be shorter: /opt/VDLinux-arm-v7a8v2r2

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cd /opt
unxz ./VDLinux-ARMv7-4.4-202-toolchain-v2r2-20110630.tar.xz
tar -C /opt/vd -xvf ./VDLinux-ARMv7-4.4-202-toolchain-v2r2-20110630.tar

2. download sources from opensource.samsung.com
you need UExxES6xxx.zip and take archive named VDLinux_2.6.35.11.tgz from there, and extract it (let`s say to /opt/src/).

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cd /opt
mkdir ./src && cd ./src
tar -xzvf VDLinux_2.6.35.11.tgz

3. copy defconfig to root of toolchain

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cd /opt/src/VDLinux-2.6.35.11/linux-2.6.35.11

and copy default config for your kernel to root of sources and rename it to .config

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cp -ar arch/arm/configs/X10P_defconfig_release .config
cp -ar arch/arm/configs/X10P_defconfig_release .config.old

4. export path to your compilers bin dir (or add to ~/.bashrc at the end), re-open terminal to use new path.

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export PATH=$PATH:/opt/VDLinux-arm-v7a8v2r2/bin

5. Check modules version, edit the file include/linux/vdlp_version.h (it is symlink to vdlp_version_X10P.h) and change for 0064 driver to:

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#define DTV_KERNEL_VERSION "0064, release"
#define DTV_LAST_PATCH "0713, DTV, X10P, release, AUS_BRANCH"

6. Prepare. Execute one by one (just for first time):

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make ARCH=arm CROSS_COMPILE=arm-v7a8v2r2-linux-gnueabi- oldconfig
make ARCH=arm CROSS_COMPILE=arm-v7a8v2r2-linux-gnueabi- prepare
make ARCH=arm CROSS_COMPILE=arm-v7a8v2r2-linux-gnueabi- prepare scripts

7. Compile kernel:

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make ARCH=arm CROSS_COMPILE=arm-v7a8v2r2-linux-gnueabi- Image

8. If it finishes without errors (ignore warnings), then

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make ARCH=arm CROSS_COMPILE=arm-v7a8v2r2-linux-gnueabi- menuconfig

(this require ncurses-dev to be pre-installed on your linux)
9. select your modules you need to compile... (like here), don`t forget to save when exit
10. Compile modules:

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make ARCH=arm CROSS_COMPILE=arm-v7a8v2r2-linux-gnueabi- modules

11. If no errors (MODPOST stage 2 w/o errors), check for your kernel modules
12. To make modules smaller size, strip with -g :

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arm-v7a8v2r2-linux-gnueabi-strip -g ./<path>/yourmodule.ko

Now you can repeat steps 8-10 to select and compile modules every time you need it.

If your pc is dualcore, you can add -j3 at the end of your command, this makes job quicker. Or for more cores: -j1+n, where n=your core number. For example:

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make ARCH=arm CROSS_COMPILE=arm-v7a8v2r2-linux-gnueabi- Image -j3

or for 4 core:

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make ARCH=arm CROSS_COMPILE=arm-v7a8v2r2-linux-gnueabi- Image -j5

Hope this helps. Good luck

p.s. This "How-TO" will be moved to wiki...
p.p.s. If anyone want to add some info, please post here.
p.p.p.s. For other series/models steps are same, just you have to use different toolchain/kernel sources.

[greenhorn]

Awesome! Thank you!

[yepp]

error on last stage 2

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  Building modules, stage 2.
  MODPOST 35 modules
WARNING: could not find fs/tntfs/.aops.o.cmd for fs/tntfs/aops.o
ERROR: "video_device_release" [drivers/media/video/uvc/uvcvideo.ko] undefined!
ERROR: "video_usercopy" [drivers/media/video/uvc/uvcvideo.ko] undefined!
ERROR: "video_register_device" [drivers/media/video/uvc/uvcvideo.ko] undefined!
ERROR: "video_device_alloc" [drivers/media/video/uvc/uvcvideo.ko] undefined!
ERROR: "video_unregister_device" [drivers/media/video/uvc/uvcvideo.ko] undefined!
ERROR: "v4l_printk_ioctl" [drivers/media/video/uvc/uvcvideo.ko] undefined!
ERROR: "video_devdata" [drivers/media/video/uvc/uvcvideo.ko] undefined!
ERROR: "v4l_compat_translate_ioctl" [drivers/media/video/uvc/uvcvideo.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2

[juusso]

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make clean
make ARCH=arm CROSS_COMPILE=arm-v7a8v2r2-linux-gnueabi- prepare modules

Btw, toolchain is available on svn

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svn checkout svn://svn.code.sf.net/p/samygo/code/develop/toolchains/T-ECP VDLinux-ARMv7-4.4-202-toolchain-v2r2-20110630