Replicant

Edit:

We have now a temporary git repository at gitorious:

http://gitorious.org/replicant

== Before starting ==

 * Root your phone

 * Backup your current system!!!

 * Install git

== Setting up the build environment and getting source code ==

These instructions assume that you are building replicant in your home directory (~).  If you are building it in another directory, modify path names accordingly.

=== Get the repo tool ===

repo is a front-end to git which is used to manage several git repositories.

{{{

 mkdir bin

 cd bin

 wget http://android.git.kernel.org/repo

 chmod a+x repo

 cd ..

}}}

=== Check out the Replicant repository ===

This step will download the Android source (minus the kernel) and the Replicant patches.

{{{

 mkdir replicant

 cd replicant

 ../bin/repo init -u git://gitorious.org/replicant/manifest.git

 ../bin/repo sync

}}}

== Optional: building the kernel and wireless LAN driver ==

By default, the Android build system uses a pre-compiled kernel and wireless driver rather than compiling these components from scratch.  If you want to compile your own copy of either of these components, you have to compile both: the wireless driver sources included with Android are incompatible with the pre-compiled kernel.

=== Get the kernel source ===

To download the kernel sources, create a file in your replicant/.repo directory called "local_manifest.xml" containing the following:

{{{

<?xml version="1.0" encoding="UTF-8"?>

 <manifest>

  <project path="kernel" name="kernel/msm" revision="refs/heads/android-msm-2.6.27"/>

 </manifest>

}}}

Then from the ~/replicant/ directory, run:

{{{

../bin/repo sync

}}}

This will create a directory called replicant/kernel and download the kernel sources to it.

=== Build the kernel ===

To build the kernel:

{{{

cd ~/replicant/kernel

export ARCH=arm

export CROSS_COMPILE=arm-eabi-

export PATH=$PATH:~/replicant/prebuilt/linux-x86/toolchain/arm-eabi-4.2.1/bin

cp arch/arm/configs/msm_defconfig .config

make oldconfig && make

}}}

Wait several hours.

=== Point the build system to your kernel ===

Create a file called `~/replicant/buildspec.mk` containing the following:

{{{

TARGET_PRODUCT:=htc_dream

TARGET_PREBUILT_KERNEL:=kernel/arch/arm/boot/zImage

}}}

This will instruct the build process to use your kernel rather than the pre-compiled kernel.

=== Build the wifi module ===

To build the wifi module:

{{{

cd ~/replicant/system/wlan/ti/sta_dk_4_0_4_32

export KERNEL_DIR=~/replicant/kernel/

make

}}}

(If make can't find your compiler, re-run same PATH export command you ran before compiling the kernel.)

Replace the pre-built wifi module with the one you just built:

{{{

cp wlan.ko ~/replicant/vendor/htc/dream-open

}}}

== Build the firmware ==

=== Change the build scripts to include some important missing packages ===

''(This section will be removed once these changes are committed to the replicant repository)''

Open the file {{{~/replicant/vendor/htc/dream-open/htc_dream.mk}}} and at the following text to the beginning of the file:

{{{

 PRODUCT_PACKAGES := \

 Calculator \

 Email \

 ImProvider \

 SdkSetup \

 VoiceDialer

}}}

This will include packages in the build which would otherwise be missing (including the SdkSetup package, which will enable incoming calls).

{{{

cd ~/replicant

make

}}}

Wait and wait and wait.

== Flashing the new firmware ==

[to be written]

== Building individual pieces ==

=== Each time you want to build something ===

 * open a new console

 * Then type:

{{{

 cd ~/replicant

 export ANDROID_JAVA_HOME=$JAVA_HOME

 lunch htc_dream-eng

 make

}}}

 * The files to flash are in ~/replicant/out/target/product/dream,flash them and then clear the cache

 * boot and push the wifi firmware if you want it

=== If you want to build a particular project ===

 * open a new console

 * build everything if it was not done before

 * Then type:

{{{

 cd ~/replicant

 source build/envsetup.sh

 export ANDROID_JAVA_HOME=$JAVA_HOME

 lunch htc_dream-eng

 #go into the directory containing an Android.mk

 mm

}}}

== Status ==

 * ril works more or less:

 * * calls should work(in/out)

 * * sms should work(in/out)

 * * headphones not supported

 * sound works even with headphones(beware calls's sound don't work with headphones)