Porting Replicant to Android 9¶

Status¶

• The Galaxy SIII 4G (i9305) boots (with graphics hacks) under AOSP9, without having to import nonfree libraries. Not much has been validated beside that.
• The kernel used is based on Linux 5.0-rc6 and has ~150 Android specific patches on top and some patches for the Galaxy SIII 4G (i9305) on top

Repositories and changes¶

• git://git.putti.eu/aosp/manifest_i9305.git
• git://git.putti.eu/aosp/kernel_i9305.git
• git://git.putti.eu/aosp/device_i9305.git

Building¶

First get the source code:

$ repo init -u git://git.putti.eu/aosp/manifest_i9305.git -b android-9.0.0

For Trisquel8 (WIP):

sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z-dev libgl1-mesa-dev libxml2-utils xsltproc unzip bc python-mako

Then see the device/putti/i9305/README.md for the build instructions.

TODO¶

Task	Time estimation	Comments
Boot a device under AOSP9	DONE	Only boots with graphics, not much more
Build it under a FSDG compliant distribution like Trisquel8	8h	It's difficult to do precise time estimations as it could work out of the box or require one full time month of work depending on how much issues are encountered
* port the changes from AOSP9 to LineageOS 16 * cleanup the code * build the kernel from the Android build system	8h
Find and remove proprietary software in LineageOS 16	8h
Find and remove privacy issues in LineageOS 16	24h
Port the sensors libraries and other device specific libraries
Add support for Audio
Add support for the i9300 and factorize the code with i9305	8h
port the touch keys, and flash led linux drivers
Port libsamsung-ipc and libsamsung-ril to Android 9
* port and cleanup the the i9300 modem linux driver from 4.16 to 5.0 * Make the modem driver and libsamsung-ipc work together	70h
add internal WiFi support and validate the functionality	6h
Add external WiFi dongles suppor	20h	External dongles support might be tricky
document how much mA the device's USB host can give and in which conditions		Needed to make external WiFi reliable (it's not in Replicant 6.0)
Rebrand LineageOS as Replicant
Create a recovery
Create install and upgrade instructions
Reduce the attack surface
Add in-system upgrades

Add support for smartphones that were supported in Replicant 4.2 and 6.0 if they meet the HardwareRequirements:

Device	Time estimation	Comments
Galaxy Note II (N7100)		Similar to the Galaxy SIII (I9300)
Galaxy Note 8.0 (N5100) and 8.0 WiFi (N5110)
Galaxy S II (i9100)		linux: devboard dts upstream? unknown status
Galaxy Note (N7000)		unknown linux upstream status
Galaxy Nexus (I9250)		OMAP4, no dts upsrteam
Galaxy Tab 2 7.0 (P3100), 7.0 WiFi (P3110), 10.1 (P5100), 10.1 WiFi (P5110)
GTA04 >= A4		TODO: a RIL needs to be written, userspace GPS support is missing, audio scenarios, etc

Replicant 6.0 changes¶

Repository path	rebase worked	Changes
build	No
manifest	No	N/A
bootable/recovery	Yes	* UI changes to improve usability * Branding * Small fix(es)
external/boringssl	Yes	* Small fix(es)
external/heimdall	No
frameworks/av	Yes	* Software rendering fix(es)
frameworks/base	Yes	* WiFi fixe(s) for external dongles * Software rendering fix(es) * Privacy fix(es) * Security improvements * Usability improvements
frameworks/native	No
hardware/broadcom/wlan	Yes	* Remove nonfree software
hardware/libhardware	Yes	* Software rendering fix(es)
hardware/libhardware_legacy	Yes	* Don't depend on nonfree software
hardware/ti/omap4	Yes	* Remove nonfree software * Don't depend on nonfree software * Small fix(es)
libcore	Yes	* Small fix(es)
packages/apps/Browser	Yes	* Privacy fix(es) * Branding * Small fix(es)
packages/apps/LegacyCamera	Yes	* Software rendering fix(es) * Small fix(es)
packages/apps/RepWifi	Not upstreamed, obsolete	N/A
packages/apps/ReplicantWallpapers	Not upstreamed	* Branding
packages/apps/Settings	No
packages/apps/SetupWizard	Yes	* Privacy fix(es) * Don't depend on nonfree software * Branding
packages/apps/ThemeChooser	Yes	* Privacy fix(es) ? * Don't depend on nonfree software ?
packages/providers/ContactsProvider	Yes	* Small fix(es)
system/core	Yes	* Branding * various fixes
vendor/replicant	No
vendor/cmsdk	Yes	* Branding
external/chromium-webview	?	?
external/drm_gralloc	Yes	* Software rendering fix(es)
external/llvm	Yes	* Software rendering fix(es)
external/mesa3d	Yes	* Software rendering fix(es) * Performance debugging for software rendering
external/parameter-framework	Yes	* Small fix(es)
external/protobuf	N/A	No changes
prebuilts/ndk	?	?
prebuilts/sdk	?	?
sdk	Yes	* Small fix(es)
toolchain/src/binutils	Yes	* Small fix(es)
toolchain/src/gcc	No
toolchain/src/jack	Yes	* Small fix(es)
toolchain/src/jill	Yes	* Small fix(es)
kernel/samsung/smdk4412	Yes	* Security fixes * Privacy Fixes (TrustZone) * Don't depend on nonfree software * Remove nonfree software * Small fix(es)
kernel/samsung/tuna
kernel/samsung/espresso10
device/samsung/i9100	No	* Replace nonfree software by free software * free software sensors implementation(s) * free software modem audio implementation(s) * Software rendering fix(es) * Privacy Fixes (TrustZone) * Don't depend on nonfree software * Remove nonfree software * Branding * Small fix(es)
device/samsung/n7000	Yes
device/samsung/i9300	No
device/samsung/i9305	No
device/samsung/n7100	Yes
device/samsung/n5100	Yes
device/samsung/n5110	Yes
device/samsung/maguro	Yes
device/samsung/tuna	Yes
device/samsung/espressowifi	Yes
device/samsung/espresso3g	Yes
device/samsung/galaxys2-common	Yes
device/samsung/smdk4412-common	No
device/samsung/kona-common	Yes
hardware/ril/samsung-ril	Not upstreamed	N/A
external/libsamsung-ipc	Not upstreamed	N/A
hardware/tinyalsa-audio	Not upstreamed?	N/A

Links¶

• https://source.android.com/setup/build/requirements