Support for Easybox 904 LTE

[Plonk34]

My github account was short time flagged, but now it is public.
PR to openwrt are here: main and uboot
The pullrequests needs reviewer.
In my personal opinium and with my small know how in programming, it is OK.
the https://github.com/Plonkbong/create-openwrt-easybox904x-patches does not work correct / need work

General, all works without ISDN, but i have not test the stability longer 24h.
The default build at the moment is with SMP support, but without Telephon (VMMC) support.
But if the pullrequest will be accepted, it is nessasary to build your own image too, if you want all working drivers.

• For the display the build must contain: Videosupport and the kmod-fb-tft module
  for this it is usefull to install this PR: https://github.com/openwrt/openwrt/pull/1885 because if not the build stops and need Kernelparameter.
• For Wifi it need devmem support inside kernel and busybox
  ( can somewhere eplain why ? I guess that values inside the binary FW for the ralink-wifi will be changed in RAM ? )

For building you can use https://github.com/Quallenauge/Easybox-904-XDSL
or the both publish PR main and uboot

For the Wifi, touchpad and display the drivers are here: https://github.com/Plonkbong/openwrt-feeds-easybox904-driver
These Drivers are not in the PR because they need work, but they are working (read this thread about it).

For the more ore less required userspace packages specialy "lcd4linux" use this feed: https://github.com/Plonkbong/openwrt-feeds-easybox904-minpkgset

For telefon support change the bootargs manuelly before build or better use these patches:
main-split-in-SMP-VPE.patch and uboot-split-in-SMP-VPE.patch
These patches split into two images one with SMP and one with Telefon support, the good thing are if you do that, the Imagebuilder contain both variants and you can later after build use them to create an changed image with or witout SMP/Telefon support.

The code for xrx200 devices are not perfect in generell for more speed read here:

Xrx200 IRQ balancing between VPEs

This post says the interrupts are not evenly distributed on xrx200. It seems the 4.14.93 openwrt kernel doesn't support the interrupt controller for the second VPE of xrx200, this seemed weird to me, so I dug on internet and I've found a kernel here which supports it. There was no devicetree with base address of the second icu, but the GPL sources from TP-W9980 contains a kernel 2.6 header (located at GPL_TD-W9980/lantiq/target/linux/ltqcpe/files/include/asm-mips/ifx/vr9/vr9.h) with hardcoded ba…

and here:

How can we make the lantiq xrx200 devices faster

The Lantiq VRX200 with the combo VRX268|VRX288 with VRX208 (called xrx200 or VR9) chipset from ca. 2013 are normaly used in xDSL-Modem-Router with and without Telefon support. I read here and herethat the chipset have a MIPS 34Kc Architecture with 2 VPEs (Virtual Processing Elements) and 9 Thread Context (TC)s per VPE. These both VPEs can be used for SMP or each VPE can run a separateoperating system. In the case of Telefon-Modem-Router the VoIP Firmware (VMMC) can or better must run on it. Th…

In the last threads you can find kernel patches for speed up, if you use them you must replace the default 4027-* patch by 4027-NET-MIPS-lantiq-support-fixed-link-incl-patch-904.patch
And if you want the 34kc arch instead the default 24kc Arch use this

I have used this diffconfig
note the the bootloader in this config make a higher CPU and RAM speed them normal (CONFIG_UBOOT_CONFIG_VR9_CPU_600M_RAM_300M=y) and it is untested.

for building i use this scripts:
in the first step i make an minimal build from source without extra packages:

#!/bin/sh

# prepare build look i these nessasary
git config --global user.email "you@example.com"; git config --global user.name "Your Name" # for merging into your local branch
cd /opt/build # your build directory
rm -r ./openwrt # delete openwrt directory if exist (not nessasary if not exist)



# clone openwrt source and create a new branch called: eb904x
git clone https://github.com/openwrt/openwrt.git
cd openwrt
git checkout -b eb904x


# install main pullrequest in branch eb904x 
git fetch origin pull/2060/head:pr001-eb904x
git rebase eb904x pr001-eb904x
git checkout eb904x
git merge pr001-eb904x


# install uboot pullrequest in branch eb904x 
git fetch origin pull/2061/head:pr002-eb904x_uboot
git rebase eb904x pr002-eb904x_uboot
git checkout eb904x
git merge pr002-eb904x_uboot


# add missed some extra kernelconfigparameter for videosupport
# without it the build stops and ask for the parameter
git fetch origin pull/1885/head:pullreq
git rebase eb904x pullreq
git checkout eb904x
git merge pullreq


# download and install split-into a SMP and VPE version patches
mkdir ./dl
rm -r ./dl; ln -sv /mnt/mapper/sda3/openwrt-source-dl dl # if you collect the whole openwrtsource like me inside /mnt/mapper/sda3/openwrt-source-dl use this line
cd ./dl
wget -O main-split-in-SMP-VPE.patch http://sprunge.us/vD2n7V
wget -O uboot-split-in-SMP-VPE.patch http://sprunge.us/ucLY0J
cd ..
git am < ./dl/main-split-in-SMP-VPE.patch
git am < ./dl/uboot-split-in-SMP-VPE.patch


# download and install patches for increase the ethernet speed
cd ./target/linux/lantiq/patches-4.14
wget -O 0901-add-icu-smp-support.patch 			https://pastebin.com/raw/pePncxSF
wget -O 0902-enable-external-irqs-for-second-vpe.patch 	https://pastebin.com/raw/ESKnmYbd
wget -O 0903-add-icu1-node-for-smp.patch 		https://pastebin.com/raw/0AvX3UF4

wget -O 0904-backport-vanilla-eth-driver.patch 		https://pastebin.com/raw/WYrJGw0e
wget -O 0905-increase-dma-descriptors.patch  		https://pastebin.com/raw/eNFjmidY
wget -O 0906-increase-dma-burst-size.patch 		https://pastebin.com/raw/M5Hei0FT

rm -v 4027-*
wget -O 4027-NET-MIPS-lantiq-support-fixed-link-incl-patch-904.patch http://sprunge.us/EQ5RWn
cd ../../../..


# this patch uses the 34Kc architecture for buildind instead of the defauld and older 24kc (not usefull because the packages are all 24kc)
#cd ./dl
#wget -O xrx200-use-34kc.patch http://sprunge.us/nINdvI
#cd ..
#patch -p1 < ./dl/xrx200-use-34kc.patch



# Change to your device: 
#	Target System = Lantiq / Suptarget = XRX200 / Target Profile = Easybox 904
# for later Display support: 
#	Global build settings  ---> / [*] Select all target specific packages by default
#	Global build settings  ---> / [*] Show packages that require graphics support (local or remote)
# for later Wifi support you need devmem support: 
# 	Global build settings  ---> / Kernel build options  ---> / [*] /dev/mem virtual device support
#	Base system  ---> / <*> busybox / [*] Customize busybox options / Miscellaneous Utilities  ---> / [*] devmem
# enable the easybox bootloader
# 	Boot Loaders  ---> / [*] u-boot-easybox904	
# eanable the SDK and the image builder
#	[*] Build the OpenWrt SDK (NEW)
# 	[*] Build the OpenWrt Image Builder
make menuconfig
make -j8 V=1 IGNORE_ERRORS=1 || make V=s IGNORE_ERRORS=1

I the next step i build the required packages that are not in openwrt for this device, with the SDK:

#!/bin/sh

cd /opt/build # my build directory change if needed

rm -rf ./owrtsdk
tar -xf $(find ./openwrt/bin/targets/lantiq/xrx200/openwrt-sdk-*.tar.xz)
mv -v $(find ./openwrt-sdk-* -type d -maxdepth 0) ./owrtsdk
cd ./owrtsdk
mkdir ./dl
rm -r ./dl; ln -sv /mnt/mapper/sda3/openwrt-source-dl dl # if you collect the whole openwrtsource like me inside /mnt/mapper/sda3/openwrt-source-dl use this line

cat ./feeds.conf.default |  grep -E -v "src-git[[:blank:]]*base.*" > ./feeds.conf

# If you do not have /opt/build/openwrt change it or use this line instead but note it is better to use same openwrt source that you have used for source build. 
#echo "src-git base https://github.com/openwrt/openwrt.git"
echo "src-git base file:///opt/build/openwrt" >> ./feeds.conf

echo "src-git eb904_driver https://github.com/Plonkbong/openwrt-feeds-easybox904-driver.git" >> ./feeds.conf
echo "src-git eb904_pkg    https://github.com/Plonkbong/openwrt-feeds-easybox904-minpkgset.git" >> ./feeds.conf

./scripts/feeds update -a

./scripts/feeds install -p eb904_driver fbtft
./scripts/feeds install -p eb904_driver touchpad
./scripts/feeds install -p eb904_driver ralink_bin
./scripts/feeds install -p eb904_driver ralink_inic

./scripts/feeds install -p eb904_pkg freetype
./scripts/feeds install -p eb904_pkg serdisplib
./scripts/feeds install -p eb904_pkg con2fbmap
./scripts/feeds install -p eb904_pkg lcd4linux-eb904
./scripts/feeds install -p eb904_pkg lcdcontroller

make -j2 IGNORE_ERRORS=1 V=1 || make -j1 IGNORE_ERRORS=1 V=s

The result are here:
eb904x-build_from_source-withspeeduppatch.tar.xz
shasum256 = 3001ac786e87f4fe4df1cd521756415a9569fbe73d4a34ac7b5aadef9f775d0e
eb904x-build_from_sdk.tar.xz
shasum256 = e6ecc24ced5b395e51ab5d39ca66047d4baec2563d4a9d043e325fe25e8f0878