forked from dan/liminix
Daniel Barlow
350ddde260
is needed by Belkin RT3200 and might also be handy for OpenWrt One? this is very copy-pastey, will tidy it up after it stops being a moving target
310 lines
10 KiB
Nix
310 lines
10 KiB
Nix
{
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description = ''
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Belkin RT-3200 / Linksys E8450
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******************************
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This device is based on a 64 bit Mediatek MT7622 ARM platform,
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and is mostly feature-complete in Liminix but as of Dec 2024
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has seen very little actual use.
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.. note:: The factory flash image contains ECC errors that make it
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incompatible with Liminix: use the `OpenWrt
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UBI Installer <https://github.com/dangowrt/owrt-ubi-installer>`_ to
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rewrite the partition layout before you can use
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Liminix with it
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Hardware summary
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================
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- MediaTek MT7622BV (1350MHz)
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- 128MB NAND flash
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- 512MB RAM
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- b/g/n wireless using MediaTek MT7622BV (MT7615E driver)
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- a/n/ac/ax wireless using MediaTek MT7915E
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Installation
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============
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Liminix on this device uses the UBI volume management system to
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perform wear leveling on the flash. This is not set up from the
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factory, so a one-time step is needed to prepare it before Liminix
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can be installed.
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Preparation
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-----------
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To prepare the device for Liminix you first need to use the
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`OpenWrt UBI Installer
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<https://github.com/dangowrt/owrt-ubi-installer>`_ image to
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rewrite the flash layout. You can do this in one of two ways:
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either follow the instructions to do it through the vendor web
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interface, or you can drop to U-boot and use TFTP
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.. code-block:: console
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MT7622> setenv ipaddr 10.0.0.6
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MT7622> setenv serverip 10.0.0.1
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MT7622> tftpboot 0x42000000 openwrt-mediatek-mt7622-linksys_e8450-ubi-initramfs-recovery-installer.itb
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MT7622> bootm 0x42000000
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This will write the new flash layout and then boot into a
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"recovery" OpenWrt installation.
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Building/installing Liminix
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----------------
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The default target for this device is ``outputs.ubimage`` which
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makes a ubifs image suitable for use with :command:`ubiupdatevol`.
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To write this to the device we use the OpenWrt recovery system
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installed in the previous step. In this configuration the
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device assigns itself the IP address 192.168.1.1/24 on its LAN
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ports and expects the connected computer to have 192.168.1.254
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.. warning:: The `ubi0_7` device in these instructions is correct
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as of Dec 2024 (dangowrt/owrt-ubi-installer commit
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d79e7928). If you are installing some time later, it
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is important to check the output from
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:command:`ubinfo -a` and make sure you are updating
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the "liminix" volume and not some other one which had
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been introduced since I wrote this.
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.. code-block:: console
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$ nix-build -I liminix-config=./my-configuration.nix --arg device "import ./devices/belkin-rt3200" -A outputs.default
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$ cat result/rootfs | ssh root@192.168.1.1 "cat > /tmp/rootfs"
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$ ssh root@192.168.1.1
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root@OpenWrt:~# ubimkvol /dev/ubi0 --name=liminix --maxavsize
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root@OpenWrt:~# ubinfo -a
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[...]
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Volume ID: 7 (on ubi0)
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Type: dynamic
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Alignment: 1
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Size: 851 LEBs (108056576 bytes, 103.0 MiB)
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State: OK
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Name: liminix
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Character device major/minor: 250:8
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root@OpenWrt:~# ubiupdatevol /dev/ubi0_7 /tmp/rootfs
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To make the new system bootable we also need to change some U-Boot variables.
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``boot_production`` needs to mount the filesystem and boot the FIT image
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found there, and :code:`bootcmd` needs to be told _not_ to boot the rescue
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image if there are records in pstore, because that interferes with
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``config.log.persistent``
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root@OpenWrt:~# fw_setenv orig_boot_production $(fw_printenv -n boot_production)
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root@OpenWrt:~# fw_setenv orig_bootcmd $(fw_printenv -n bootcmd)
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root@OpenWrt:~# fw_setenv boot_production 'led $bootled_pwr on ; ubifsmount ubi0:liminix && ubifsload ''${loadaddr} boot/fit && bootm ''${loadaddr}'
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root@OpenWrt:~# fw_setenv bootcmd 'run boot_ubi'
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For subsequent Liminix reinstalls, just run the
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:command:`ubiupdatevol` command again. You don't need to repeat
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the "Preparation" step and in fact should seek to avoid it if
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possible, as it will reset the erase counters used for write
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levelling. Using UBI-aware tools is therefore preferred over any
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kind of "factory" wipe which will reset them.
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'';
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system = {
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crossSystem = {
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config = "aarch64-unknown-linux-musl";
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};
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};
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module = {pkgs, config, lib, lim, ... }:
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let inherit (lib) mkIf;
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firmware = pkgs.stdenv.mkDerivation {
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name = "wlan-firmware";
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phases = ["installPhase"];
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installPhase = ''
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mkdir $out
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cp ${pkgs.linux-firmware}/lib/firmware/mediatek/{mt7915,mt7615,mt7622}* $out
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'';
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};
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openwrt = pkgs.openwrt_24_10;
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in {
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imports = [
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../../modules/arch/aarch64.nix
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../../modules/outputs/tftpboot.nix
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../../modules/outputs/ubifs.nix
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];
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config = {
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kernel = {
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extraPatchPhase = ''
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${openwrt.applyPatches.mediatek}
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'';
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src = openwrt.kernelSrc;
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version = openwrt.kernelVersion;
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config = {
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PCI = "y";
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ARCH_MEDIATEK = "y";
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# ARM_MEDIATEK_CPUFREQ = "y";
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# needed for "Cannot find regmap for /infracfg@10000000"
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MFD_SYSCON = "y";
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MTK_INFRACFG = "y";
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MTK_PMIC_WRAP = "y";
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NVMEM_MTK_EFUSE="y";
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# MTK_HSDMA="y";
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MTK_SCPSYS="y";
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MTK_SCPSYS_PM_DOMAINS="y";
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# MTK_THERMAL="y";
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MTK_TIMER="y";
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COMMON_CLK_MT7622 = "y";
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COMMON_CLK_MT7622_ETHSYS = "y";
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COMMON_CLK_MT7622_HIFSYS = "y";
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COMMON_CLK_MT7622_AUDSYS = "y";
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PM_CLK="y";
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REGMAP_MMIO = "y";
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CLKSRC_MMIO = "y";
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REGMAP = "y";
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MEDIATEK_GE_PHY = "y";
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# MEDIATEK_MT6577_AUXADC = "y";
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NET_MEDIATEK_SOC = "y";
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NET_MEDIATEK_SOC_WED = "y";
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NET_MEDIATEK_STAR_EMAC = "y"; # this enables REGMAP_MMIO
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NET_VENDOR_MEDIATEK = "y";
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PCIE_MEDIATEK = "y";
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BLOCK = "y"; # move this to base option
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SPI_MASTER = "y";
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SPI = "y";
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SPI_MEM="y";
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SPI_MTK_NOR="y";
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SPI_MTK_SNFI = "y";
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MTD = "y";
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MTD_BLOCK = "y";
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MTD_RAW_NAND = "y";
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MTD_NAND_MTK = "y";
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MTD_NAND_MTK_BMT = "y"; # Bad-block Management Table
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MTD_NAND_ECC_MEDIATEK= "y";
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MTD_NAND_ECC_SW_HAMMING= "y";
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MTD_SPI_NAND= "y";
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MTD_OF_PARTS = "y";
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MTD_NAND_CORE= "y";
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MTD_SPI_NOR= "y";
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MTD_SPLIT_FIRMWARE= "y";
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MTD_SPLIT_FIT_FW= "y";
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MMC = "y";
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MMC_BLOCK = "y";
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MMC_CQHCI = "y";
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MMC_MTK = "y";
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# Distributed Switch Architecture is needed
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# to make the ethernet ports visible
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NET_DSA="y";
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NET_DSA_MT7530="y";
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NET_DSA_TAG_MTK="y";
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SERIAL_8250 = "y";
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SERIAL_8250_CONSOLE = "y";
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SERIAL_8250_MT6577="y";
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# SERIAL_8250_NR_UARTS="3";
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# SERIAL_8250_RUNTIME_UARTS="3";
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SERIAL_OF_PLATFORM="y";
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# Must enble hardware watchdog drivers. Else the device reboots after several seconds
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WATCHDOG = "y";
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MEDIATEK_WATCHDOG = "y";
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};
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conditionalConfig = {
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WLAN= {
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MT7615E = "m";
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MT7622_WMAC = "y";
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MT7915E = "m";
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};
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};
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};
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boot = {
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commandLine = [ "console=ttyS0,115200" ];
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tftp.loadAddress = lim.parseInt "0x4007ff28";
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imageFormat = "fit";
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loader.fit.enable = lib.mkDefault true; # override this if you are building tftpboot
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};
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rootfsType = lib.mkDefault "ubifs"; # override this if you are building tftpboot
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filesystem =
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let inherit (pkgs.pseudofile) dir symlink;
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in
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dir {
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lib = dir {
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firmware = dir {
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mediatek = symlink firmware;
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};
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};
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};
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hardware =
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let
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mac80211 = pkgs.kmodloader.override {
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targets = ["mt7615e" "mt7915e"];
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inherit (config.system.outputs) kernel;
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};
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in {
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ubi = {
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minIOSize = "2048";
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logicalEraseBlockSize = "126976";
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physicalEraseBlockSize = "131072";
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maxLEBcount = "1024"; # guessing
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};
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defaultOutput = "ubimage";
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# the kernel expects this to be on a 2MB boundary. U-Boot
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# (I don't know why) has a default of 0x41080000, which isn't.
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# We put it at the 32MB mark so that tftpboot can put its rootfs
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# image and DTB underneath, but maybe this is a terrible waste of
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# RAM unless the kernel is able to reuse it later. Oh well
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loadAddress = lim.parseInt "0x42000000";
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entryPoint = lim.parseInt "0x42000000";
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rootDevice = "ubi0:liminix";
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dts = {
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src = "${openwrt.src}/target/linux/mediatek/dts/mt7622-linksys-e8450-ubi.dts";
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includePaths = [
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"${openwrt.src}/target/linux/mediatek/dts"
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"${config.system.outputs.kernel.modulesupport}/arch/arm64/boot/dts/mediatek/"
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];
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includes = mkIf config.logging.persistent.enable [
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./pstore-pmsg.dtsi
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];
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};
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# - 0x000000000000-0x000008000000 : "spi-nand0"
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# - 0x000000000000-0x000000080000 : "bl2"
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# - 0x000000080000-0x0000001c0000 : "fip"
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# - 0x0000001c0000-0x0000002c0000 : "factory"
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# - 0x0000002c0000-0x000000300000 : "reserved"
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# - 0x000000300000-0x000008000000 : "ubi"
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networkInterfaces =
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let
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inherit (config.system.service.network) link;
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in rec {
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wan = link.build { ifname = "wan"; };
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lan1 = link.build { ifname = "lan1"; };
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lan2 = link.build { ifname = "lan2"; };
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lan3 = link.build { ifname = "lan3"; };
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lan4 = link.build { ifname = "lan4"; };
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lan = lan3;
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wlan = link.build {
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ifname = "wlan0";
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dependencies = [ mac80211 ];
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};
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wlan5 = link.build {
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ifname = "wlan1";
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dependencies = [ mac80211 ];
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};
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};
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};
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};
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};
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}
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