Hi,
I'm trying to create a port of Android to the gumstix Overo Earth
platform with the Palo43 touchscreen (www.gumstix.com). I have
attached the entire procedure that I have followed so far below. I
would appreciate it if someone could help me with completing this
port.
My immediate problem and the point that I am currently stuck at, is as
follows:
I have created a set of patch files from the generic android-2.6.29
branch, but then came across the following post that all the android
stuff for 2.6.29 is located under the driver/staging/android
directory.
How should I re-arrange it and create a new set of patch files to move
all this to the correct location (not sure which the correct location
is)?
I use the following commands to create the first set of patch files:
$ mkdir android
$ cd android
$ git clone git://android.git.kernel.org/kernel/common.git kernel
$ cd kernel
$ git checkout --track -b android-2.6.29 origin/android-2.6.29
$ git format-patch v2.6.30-rc1
How do I create a set of patches to move the required files to the
correct location. I came across another post that talked about some
missing files, like ashmem, etc. How cam I get this complete list of
files and create a working patch?
Best regards,
Elvis
How to port Android to the Overo TI OMAP 3503 platform
-----------------------------------------------------------------------------------
Overview
This document describe the procedure to patch the Overo linux kernel
to run the Android platform on the Overo Earth.
Procedure
Step 01.00: Set up the Overo build environment.
These instructions will assume that you are installing the build
system in your home directory under "overo-oe". If you decide to put
it elsewhere you will need to make appropriate alterations to the
steps below.
First we will create the "overo-oe" directory and cd into it:
$ mkdir -p ~/overo-oe
$ cd ~/overo-oe
Then we will install the OE metatdata, and check out the overo branch
(you can safely ignore the warnings you will get from the git
commands):
$ git clone git://gitorious.org/gumstix-oe/mainline.git
org.openembedded.dev
$ cd org.openembedded.dev
$ git checkout --track -b overo origin/overo
The next step installs BitBake:
$ cd ~/overo-oe
$ svn co svn://svn.berlios.de/bitbake/branches/bitbake-1.8/ bitbake
Step 01.01: Create the OE configuration files and profile.
We now will create a profile script and the configuration files
required to tailor OE to our needs.
To make this a somewhat easier task, there is a template for the
required files in the openembedded installation we just did.
Copy these files to your overo-oe directory:
$ cp -r org.openembedded.dev/contrib/gumstix/build .
If you have followed the example installation and placed the build
system in overo-oe in your home directory, you are now ready to
proceed to the next step. If you have installed the build system in a
different location you will need to edit overo-oe/build/profile and
change the definition of OVEROTOP as appropriate.
Step 01.02: Setup source code caching.
As part of the build process OpenEmbedded downloads source code
tarballs for the linux kernel, compiler, and other software packages.
By default this source code cache will be placed in overo-oe/sources.
If you would like this cache to be located elsewhere, now is the time
to edit build/conf/site.conf and set DL_DIR as appropriate.
For example, if you would like to cache the sources in /usr/share/
sources, perform the following steps:
Add new group for cache management and add operating user to this
group.
$ sudo groupadd oe
$ sudo usermod -a -G oe {your_username}
Next make source code storing directory and set owner and permission
appropriately.
$ sudo mkdir /usr/share/sources
$ sudo chgrp oe /usr/share/sources
$ sudo chmod 0775 /usr/share/sources
$ sudo chmod ug+s /usr/share/sources
Edit the buid/conf/site.conf and set DL_DIR to /usr/share/sources as
follows:
DL_DIR = "/usr/share/sources"
Step 01.03: Setup environment variables.
Press ctrl+h to display all hidden files.
Setup environment variables by modifying you bash profile.
Copy the contents of ~/gumstix-oe/extras/profile to you .bashrc file.
$ cp ~/.bashrc ~/bashrc.bak
$ cat ~/overo-oe/build/profile >> ~/.bashrc
Step 01.04: Modify the OE sources
overo-oe/conf/auto.conf
overo-oe/conf/local.conf
overo-oe/org.openembedded.dev/conf/machine/overo3503-palo43.conf
overo-oe/org.openembedded.dev/conf/distro/android-1.0.conf
Search for the omap3-console-image.bb file by typing the following
command
find org.openembedded.dev -name *.bb | grep “omap*”
This should be located in the following folder:
overo-oe/org.openembedded.dev/recipies/images/
Create a copy of the following file:
recipies/images/omap3-console-image.bb
and save it as
recipies/images/omap3-android-image.bb
Step 02.00: Download the android-2.6.29 kernel sources.
Adapted from instructions outlined in Get source (Android Open Source
Project).
Step 02.01: Create an empty directory to hold your working files:
$ mkdir android
$ cd android
We’re only interested in getting the Android Kernel sources, so type
the following command:
$ git clone git://android.git.kernel.org/kernel/common.git kernel
Step 02.02: Check out the android-2.6.29 kernel files.
Run the following command to checkout the android-2.6.29 kernel files:
$ cd kernel
$ git checkout --track -b android-2.6.29 origin/android-2.6.29
For a full list of available android kernel versions, go to
http://android.git.kernel.org/?p=kernel/common.git;a=summary.
Step 04.00: Make a set of patches between the linux-2.6.30-rc1 and
android-2.6.29 kernel sources.
To make a set of patches between the two kernel versions, type the
following command:
$ git format-patch v2.6.30-rc1
Step 04.01: Remove the unnecessary patches, for example, bluetooth,
mmc, pm, yaff, etc.
For the Gizmo-DO, we will need to incorporate the TSC2046 touchscreen
chip.
For the Palo43. we will need to incorporate the TI ADS7846 touchscreen
driver.
[TODO: Add a download link to the reduced patch set.]
List of android components to be included in the build:
android-binder
android-ram_console
android more printk formats
lowmemory killer
changes to the kernel when electing not to use a swap:
android-alarm-driver
Step 04.02: Put the patches in the recipes/linux/linux-omap3-2.6.29
folder and add them to the SRC_URI of the linux-omap3_2.6.29.bb
recipe.
To make things easier, get the list of file names by typing ls >
patchfilelist.txt, and copy paste all the file names to the linux-
omap3_2.6.29.bb recipe.
Step 04.03: Modify the defconfig file in the linux-omap3-2.6.29/overo
folder, and add the Android configuration entires.
2.6.29 based Android Kernel features
Belows is kernel feature for the 2.6.29 based android kernel:
01). GoldFish : Qemutrace , FB Driver/RTC/Power/Nand/MMC/Events/tty/
audio for godlfish
02). pmem : Android pmem allocator
03). yaffs : mtdif2
04). kernel debugger
05). android USB : USB Gadget driver for android.
06). HAL : TI Wifi Control Functions , Bluetooth (RFCOMM-L2CAP
Socket)
07). Android Shared Memory (ASHMEM)
08). Paranoid Network
09). Binder: mmap fix , more offset validation
10). Power : User Wake Lock , Wake Lock , Early Suspend , FB
Eearlysuspend
11). Logger Subsystem
12). Low Memory Killer: /sys/module/lowmemorykiller/parameters/adj and
minfree
11). Etc : Timed GPIO / Timed Output
Required enabled config options
After building a standard defconfig, ensure that these options are
enabled in your .config or defconfig if they are not already. Based
off the msm_defconfig. You should keep the rest of the default
options enabled in the defconfig unless you know what you are doing.
ANDROID_PARANOID_NETWORK
ASHMEM
CONFIG_FB_MODE_HELPERS
CONFIG_FONT_8x16
CONFIG_FONT_8x8
CONFIG_YAFFS_SHORT_NAMES_IN_RAM
DAB
EARLYSUSPEND
FB
FB_CFB_COPYAREA
FB_CFB_FILLRECT
FB_CFB_IMAGEBLIT
FB_DEFERRED_IO
FB_TILEBLITTING
HIGH_RES_TIMERS
INOTIFY
INOTIFY_USER
INPUT_EVDEV
INPUT_GPIO
INPUT_MISC
LEDS_CLASS
LEDS_GPIO
LOCK_KERNEL
LkOGGER
LOW_MEMORY_KILLER
MISC_DEVICES
NEW_LEDS
NO_HZ
POWER_SUPPLY
PREEMPT
RAMFS
RTC_CLASS
RTC_LIB
SWITCH
SWITCH_GPIO
TMPFS
UID_STAT
UID16
USB_FUNCTION
USB_FUNCTION_ADB
USER_WAKELOCK
VIDEO_OUTPUT_CONTROL
WAKELOCK
YAFFS_AUTO_YAFFS2
YAFFS_FS
YAFFS_YAFFS1
YAFFS_YAFFS2
Required disabled config options
CONFIG_YAFFS_DISABLE_LAZY_LOAD
DNOTIFY
Recommended enabled config options
ANDROID_PMEM
ANDROID_RAM_CONSOLE
ANDROID_RAM_CONSOLE_ERROR_CORRECTION
SCHEDSTATS
DEBUG_PREEMPT
DEBUG_MUTEXES
DEBUG_SPINLOCK_SLEEP
DEBUG_INFO
FRAME_POINTER
CPU_FREQ
CPU_FREQ_TABLE
CPU_FREQ_DEFAULT_GOV_ONDEMAND
CPU_FREQ_GOV_ONDEMAND
CRC_CCITT
EMBEDDED
INPUT_TOUCHSCREEN
I2C
I2C_BOARDINFO
LOG_BUF_SHIFT=17
SERIAL_CORE
SERIAL_CORE_CONSOLE
Step 04.04: Rebuild the overo kernel.
Go to the linux-omap3-2.6.29.bb file, and change the PR variable to a
higher release number, e.g
PR = "r1"
and then re-run the bitbake command.
Run the following command to rebuild the overo kernel with the android
patches:
bitbake -c clean linux-omap3-2.6.29
bitbake linux-omap3-2.6.29
If you are in the phase where you are debugging compiler errors, use
the following command:
bitbake -c compiler -f path/to/file
which will force a recompile, skipping the fetch and patching phases,
and the later staging and installation phases.
Once you have it compiling and are working on logic errors, use
bitbake to package up the software by running the following command:
bitbake -c rebuild linux-omap3-2.6.29
after each editing session.
If you don’t want to bump the PR in the recipe with each edit, use the
following command:
ipkg -force-reinstall install linux-omap3-2.6.29
Step 05.00: Compile Android kernel from the source.
Download and install a Java JDK to build the Android sources.
jdk-6u12-linux-i586-rpm.bin
Go to the android directory and sync the repository to get all the
android sources.
$ cd android
$ repo init -u git://android.git.kernel.org/platform/manifest.git
$ repo sync
Note: We have forced the kernel/common branch to android-2.6.29, from
the previous steps. Else, as of April 14th 2009, the kernel/common
branch defaults to android-2.6.27.
$ make
--~--~---------~--~----~------------~-------~--~----~
unsubscribe: android-kernel+unsubscr...@googlegroups.com
website: http://groups.google.com/group/android-kernel
-~----------~----~----~----~------~----~------~--~---
