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liminix/devices/belkin-rt3200/default.nix

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{
description = ''
Belkin RT-3200 / Linksys E8450
******************************
This device is based on a 64 bit Mediatek MT7622 ARM platform,
and is mostly feature-complete in Liminix but as of Dec 2024
has seen very little actual use.
.. note:: The factory flash image contains ECC errors that make it
incompatible with Liminix: use the `OpenWrt
UBI Installer <https://github.com/dangowrt/owrt-ubi-installer>`_ to
rewrite the partition layout before you can use
Liminix with it
Hardware summary
================
- MediaTek MT7622BV (1350MHz)
- 128MB NAND flash
- 512MB RAM
- b/g/n wireless using MediaTek MT7622BV (MT7615E driver)
- a/n/ac/ax wireless using MediaTek MT7915E
Installation
============
Liminix on this device uses the UBI volume management system to
perform wear leveling on the flash. This is not set up from the
factory, so a one-time step is needed to prepare it before Liminix
can be installed.
Preparation
-----------
To prepare the device for Liminix you first need to use the
`OpenWrt UBI Installer
<https://github.com/dangowrt/owrt-ubi-installer>`_ image to
rewrite the flash layout. You can do this in one of two ways:
either follow the instructions to do it through the vendor web
interface, or you can drop to U-boot and use TFTP
.. code-block:: console
MT7622> setenv ipaddr 10.0.0.6
MT7622> setenv serverip 10.0.0.1
MT7622> tftpboot 0x42000000 openwrt-mediatek-mt7622-linksys_e8450-ubi-initramfs-recovery-installer.itb
MT7622> bootm 0x42000000
This will write the new flash layout and then boot into a
"recovery" OpenWrt installation.
Building/installing Liminix
----------------
The default target for this device is ``outputs.ubimage`` which
makes a ubifs image suitable for use with :command:`ubiupdatevol`.
To write this to the device we use the OpenWrt recovery system
installed in the previous step. In this configuration the
device assigns itself the IP address 192.168.1.1/24 on its LAN
ports and expects the connected computer to have 192.168.1.254
.. warning:: The `ubi0_7` device in these instructions is correct
as of Dec 2024 (dangowrt/owrt-ubi-installer commit
d79e7928). If you are installing some time later, it
is important to check the output from
:command:`ubinfo -a` and make sure you are updating
the "liminix" volume and not some other one which had
been introduced since I wrote this.
.. code-block:: console
$ nix-build -I liminix-config=./my-configuration.nix --arg device "import ./devices/belkin-rt3200" -A outputs.default
$ cat result/rootfs | ssh root@192.168.1.1 "cat > /tmp/rootfs"
$ ssh root@192.168.1.1
root@OpenWrt:~# ubimkvol /dev/ubi0 --name=liminix --maxavsize
root@OpenWrt:~# ubinfo -a
[...]
Volume ID: 7 (on ubi0)
Type: dynamic
Alignment: 1
Size: 851 LEBs (108056576 bytes, 103.0 MiB)
State: OK
Name: liminix
Character device major/minor: 250:8
root@OpenWrt:~# ubiupdatevol /dev/ubi0_7 /tmp/rootfs
root@OpenWrt:~# fw_setenv orig_boot_production $(fw_printenv boot_production | sed -E 's/.+?=//')
root@OpenWrt:~# fw_setenv boot_production 'led $bootled_pwr on ; ubifsmount ubi0:liminix && ubifsload ''${loadaddr} boot/fit && bootm ''${loadaddr}'
For subsequent Liminix reinstalls, you don't need to repeat the
"Preparation" step and in fact should seek to avoid it if
possible. Updating volumes with :command:`ubiupdatevol` will
preserve the erase counters used for write levelling, so is
preferred over any kind of "factory" wipe which will reset them.
'';
system = {
crossSystem = {
config = "aarch64-unknown-linux-musl";
};
};
module = {pkgs, config, lib, lim, ... }:
let firmware = pkgs.stdenv.mkDerivation {
name = "wlan-firmware";
phases = ["installPhase"];
installPhase = ''
mkdir $out
cp ${pkgs.linux-firmware}/lib/firmware/mediatek/{mt7915,mt7615,mt7622}* $out
'';
};
in {
imports = [
../../modules/arch/aarch64.nix
../../modules/outputs/tftpboot.nix
../../modules/outputs/ubifs.nix
];
config = {
kernel = {
extraPatchPhase = ''
${pkgs.openwrt.applyPatches.mediatek}
'';
config = {
PCI = "y";
ARCH_MEDIATEK = "y";
# ARM_MEDIATEK_CPUFREQ = "y";
# needed for "Cannot find regmap for /infracfg@10000000"
MFD_SYSCON = "y";
MTK_INFRACFG = "y";
MTK_PMIC_WRAP = "y";
NVMEM_MTK_EFUSE="y";
# MTK_HSDMA="y";
MTK_SCPSYS="y";
MTK_SCPSYS_PM_DOMAINS="y";
# MTK_THERMAL="y";
MTK_TIMER="y";
COMMON_CLK_MT7622 = "y";
COMMON_CLK_MT7622_ETHSYS = "y";
COMMON_CLK_MT7622_HIFSYS = "y";
COMMON_CLK_MT7622_AUDSYS = "y";
PM_CLK="y";
REGMAP_MMIO = "y";
CLKSRC_MMIO = "y";
REGMAP = "y";
MEDIATEK_GE_PHY = "y";
# MEDIATEK_MT6577_AUXADC = "y";
NET_MEDIATEK_SOC = "y";
NET_MEDIATEK_SOC_WED = "y";
NET_MEDIATEK_STAR_EMAC = "y"; # this enables REGMAP_MMIO
NET_VENDOR_MEDIATEK = "y";
PCIE_MEDIATEK = "y";
BLOCK = "y"; # move this to base option
SPI_MASTER = "y";
SPI = "y";
SPI_MEM="y";
SPI_MTK_NOR="y";
SPI_MTK_SNFI = "y";
MTD = "y";
MTD_BLOCK = "y";
MTD_RAW_NAND = "y";
MTD_NAND_MTK = "y";
MTD_NAND_MTK_BMT = "y"; # Bad-block Management Table
MTD_NAND_ECC_MEDIATEK= "y";
MTD_NAND_ECC_SW_HAMMING= "y";
MTD_SPI_NAND= "y";
MTD_OF_PARTS = "y";
MTD_NAND_CORE= "y";
MTD_SPI_NOR= "y";
MTD_SPLIT_FIRMWARE= "y";
MTD_SPLIT_FIT_FW= "y";
MMC = "y";
MMC_BLOCK = "y";
MMC_CQHCI = "y";
MMC_MTK = "y";
# Distributed Switch Architecture is needed
# to make the ethernet ports visible
NET_DSA="y";
NET_DSA_MT7530="y";
NET_DSA_TAG_MTK="y";
PSTORE = "y";
PSTORE_RAM = "y";
PSTORE_CONSOLE = "y";
PSTORE_DEFLATE_COMPRESS = "n";
SERIAL_8250 = "y";
SERIAL_8250_CONSOLE = "y";
SERIAL_8250_MT6577="y";
# SERIAL_8250_NR_UARTS="3";
# SERIAL_8250_RUNTIME_UARTS="3";
SERIAL_OF_PLATFORM="y";
# Must enble hardware watchdog drivers. Else the device reboots after several seconds
WATCHDOG = "y";
MEDIATEK_WATCHDOG = "y";
};
conditionalConfig = {
WLAN= {
MT7615E = "m";
MT7622_WMAC = "y";
MT7915E = "m";
};
};
};
boot = {
commandLine = [ "console=ttyS0,115200" ];
tftp.loadAddress = lim.parseInt "0x4007ff28";
imageFormat = "fit";
loader.fit.enable = lib.mkDefault true; # override this if you are building tftpboot
};
rootfsType = lib.mkDefault "ubifs"; # override this if you are building tftpboot
filesystem =
let inherit (pkgs.pseudofile) dir symlink;
in
dir {
lib = dir {
firmware = dir {
mediatek = symlink firmware;
};
};
};
hardware =
let
openwrt = pkgs.openwrt;
mac80211 = pkgs.kmodloader.override {
targets = ["mt7615e" "mt7915e"];
inherit (config.system.outputs) kernel;
};
in {
ubi = {
minIOSize = "2048";
logicalEraseBlockSize = "126976";
physicalEraseBlockSize = "131072";
maxLEBcount = "1024"; # guessing
};
defaultOutput = "ubimage";
# the kernel expects this to be on a 2MB boundary. U-Boot
# (I don't know why) has a default of 0x41080000, which isn't.
# We put it at the 32MB mark so that tftpboot can put its rootfs
# image and DTB underneath, but maybe this is a terrible waste of
# RAM unless the kernel is able to reuse it later. Oh well
loadAddress = lim.parseInt "0x42000000";
entryPoint = lim.parseInt "0x42000000";
rootDevice = "ubi0:liminix";
dts = {
src = "${openwrt.src}/target/linux/mediatek/dts/mt7622-linksys-e8450-ubi.dts";
includePaths = [
"${openwrt.src}/target/linux/mediatek/dts"
"${config.system.outputs.kernel.modulesupport}/arch/arm64/boot/dts/mediatek/"
];
};
# - 0x000000000000-0x000008000000 : "spi-nand0"
# - 0x000000000000-0x000000080000 : "bl2"
# - 0x000000080000-0x0000001c0000 : "fip"
# - 0x0000001c0000-0x0000002c0000 : "factory"
# - 0x0000002c0000-0x000000300000 : "reserved"
# - 0x000000300000-0x000008000000 : "ubi"
networkInterfaces =
let
inherit (config.system.service.network) link;
in rec {
wan = link.build { ifname = "wan"; };
lan1 = link.build { ifname = "lan1"; };
lan2 = link.build { ifname = "lan2"; };
lan3 = link.build { ifname = "lan3"; };
lan4 = link.build { ifname = "lan4"; };
lan = lan3;
wlan = link.build {
ifname = "wlan0";
dependencies = [ mac80211 ];
};
wlan5 = link.build {
ifname = "wlan1";
dependencies = [ mac80211 ];
};
};
};
};
};
}
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