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liminix/devices/gl-ar750/default.nix

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# I like GL.iNet devices because they're relatively accessible to
# DIY users: the serial port connections have headers preinstalled
# and don't need soldering
# Mainline linux 5.19 doesn't have device-tree support for this device
# or even for the SoC, so we use the extensive OpenWrt kernel patches
rec {
system = {
crossSystem = {
config = "mips-unknown-linux-musl";
gcc = {
abi = "32";
arch = "24kc"; # maybe mips_24kc-
};
};
};
description = ''
GL.iNet GL-AR750
****************
The GL-AR750 "Creta" travel router features:
- QCA9531 @650Mhz SoC
- dual band wireless: IEEE 802.11a/b/g/n/ac
- two 10/100Mbps LAN ports and one WAN
- 128MB DDR2 RAM
- 16MB NOR Flash
- supported in OpenWrt by the "ath79" SoC family
As with many GL.iNet devices, the stock vendor firmware
is a fork of OpenWrt, meaning that the plain binary
``firmware.bin`` that Liminix builds can be flashed using the
vendor web UI and the U-Boot emergency "unbrick" routine
The GL-AR750 has two distinct sets of wifi hardware. The 2.4GHz
radio is part of the QCA9531 SoC, i.e. it's on the same silicon as
the CPU, the Ethernet, the USB etc. The device is connected to the
host via AHB, the "Advanced High-Performance Bus" and it is
supported in Linux using the ath9k driver. The 5GHz support, on the
other hand, is provided by a QCA9887 PCIe (PCI embedded) WLAN chip:
I haven't looked closely at the router innards to see if this is
actually physically a separate board that could be unplugged, but
as far as Linux is concerned it behaves as one. This is
supported by the ath10k driver.
Vendor web page: https://www.gl-inet.com/products/gl-ar750/
OpenWrt web page: https://openwrt.org/toh/gl.inet/gl-ar750
'';
installer = "flashimage";
module = {pkgs, config, ... }:
let
openwrt = pkgs.openwrt;
firmwareBlobs = pkgs.pkgsBuildBuild.fetchFromGitHub {
owner = "kvalo";
repo = "ath10k-firmware";
rev = "5d63529ffc6e24974bc7c45b28fd1c34573126eb";
sha256 = "1bwpifrwl5mvsmbmc81k8l22hmkwk05v7xs8dxag7fgv2kd6lv2r";
};
firmware = pkgs.stdenv.mkDerivation {
name = "wlan-firmware";
phases = ["installPhase"];
installPhase = ''
mkdir -p $out/ath10k/QCA9887/hw1.0/
blobdir=${firmwareBlobs}/QCA9887/hw1.0
cp $blobdir/10.2.4-1.0/firmware-5.bin_10.2.4-1.0-00047 $out/ath10k/QCA9887/hw1.0/firmware-5.bin
cp $blobdir/board.bin $out/ath10k/QCA9887/hw1.0/
'';
};
mac80211 = pkgs.mac80211.override {
drivers = ["ath9k" "ath10k_pci"];
klibBuild = config.system.outputs.kernel.modulesupport;
};
ath10k_cal_data =
let
offset = 1024 * 20; # 0x5000
size = 2048 + 68; # 0x844
in pkgs.liminix.services.oneshot rec {
name = "ath10k_cal_data";
up = ''
part=$(basename $(dirname $(grep -l art /sys/class/mtd/*/name)))
echo ART partition is ''${part-unset}
test -n "$part" || exit 1
(in_outputs ${name}
dd if=/dev/$part of=data iflag=skip_bytes,fullblock bs=${toString size} skip=${toString offset} count=1
)
'';
};
inherit (pkgs.pseudofile) dir symlink;
inherit (pkgs.liminix.networking) interface;
in {
imports = [
../../modules/network
../../modules/arch/mipseb.nix
];
programs.busybox.options = {
FEATURE_DD_IBS_OBS = "y"; # ath10k_cal_data needs skip_bytes,fullblock
};
hardware = {
defaultOutput = installer;
loadAddress = "0x80060000";
entryPoint = "0x80060000";
flash = {
address = "0x9F060000";
size ="0xfa0000";
eraseBlockSize = "65536";
};
rootDevice = "/dev/mtdblock5";
dts = {
src = "${openwrt.src}/target/linux/ath79/dts/qca9531_glinet_gl-ar750.dts";
includes = [
"${openwrt.src}/target/linux/ath79/dts"
];
};
networkInterfaces =
let inherit (config.system.service.network) link;
in {
lan = link.build { ifname = "eth0"; };
wan = link.build { ifname = "eth1"; };
wlan = link.build {
ifname = "wlan0";
dependencies = [ mac80211 ];
};
wlan5 = link.build {
ifname = "wlan1";
dependencies = [ mac80211 ath10k_cal_data ];
};
};
};
filesystem = dir {
lib = dir {
firmware = dir {
ath10k = dir {
QCA9887 = symlink "${firmware}/ath10k/QCA9887";
"cal-pci-0000:00:00.0.bin" = symlink "${ath10k_cal_data}/.outputs/data";
};
};
};
};
boot.tftp = {
loadAddress = "0x00A00000";
};
kernel = {
src = pkgs.pkgsBuildBuild.fetchurl {
name = "linux.tar.gz";
url = "https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.15.71.tar.gz";
hash = "sha256-yhO2cXIeIgUxkSZf/4aAsF11uxyh+UUZu6D1h92vCD8=";
};
extraPatchPhase = ''
${openwrt.applyPatches.ath79}
'';
config = {
ATH79 = "y";
PCI = "y";
PCI_AR724X = "y";
SERIAL_8250_CONSOLE = "y";
SERIAL_8250 = "y";
SERIAL_CORE_CONSOLE = "y";
# need this to open console device at boot. dmesg goes from
# [ 0.272934] Warning: unable to open an initial console.
# to
# [ 0.247413] printk: console [ttyS0] disabled
# [ 0.25200] 18020000.uart: ttyS0 at MMIO 0x1802000 (irq = 10, base_baud = 1562500) is a 16550A
SERIAL_OF_PLATFORM = "y";
CONSOLE_LOGLEVEL_DEFAULT = "8";
CONSOLE_LOGLEVEL_QUIET = "4";
NET = "y";
ETHERNET = "y";
NET_VENDOR_ATHEROS = "y";
AG71XX = "y"; # ethernet (qca,qca9530-eth)
MFD_SYSCON = "y"; # ethernet (compatible "syscon")
AR8216_PHY = "y"; # eth1 is behind a switch
MTD_SPI_NOR = "y";
SPI_ATH79 = "y"; # these are copied from OpenWrt.
SPI_MASTER= "y"; # At least one of them is necessary
SPI_MEM= "y";
SPI_AR934X= "y";
SPI_BITBANG= "y";
SPI_GPIO= "y";
GPIO_ATH79 = "y";
GPIOLIB = "y";
EXPERT="y";
GPIO_SYSFS = "y"; # required by patches-5.15/0004-phy-add-ath79-usb-phys.patch
OF_GPIO = "y";
SYSFS = "y";
SPI = "y";
MTD = "y";
MTD_BLOCK = "y"; # fix undefined ref to register_mtd_blktrans_devs
WATCHDOG = "y";
ATH79_WDT = "y"; # watchdog timer
# this is all copied from nixwrt ath79 config. Clearly not all
# of it is device config, some of it is wifi config or
# installation method config or ...
EARLY_PRINTK = "y";
PRINTK_TIME = "y";
};
};
};
}
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