mediatek: add support for Ubiquiti UniFi 6 LR

Hardware
--------

MediaTek MT7622
512MB DDR3 RAM
64M SPI-NOR Flash (Winbond W25Q512JV)
MediaTek MT7622 802.11bgn 4T4R WMAC
MediaTek MT7915 802.11ax 4T4R
Marvell AQR1112 100/1000/2500 NBase-T PHY
Holtek HT32F52241 LED controller
Reset Switch

UART
----

CPU UART0 at the pinout next to the Holtek MCU.

Pinout (first pin next to SoC / MCU)

0 3V3
1 RX
2 TX
3 GND

Settings are 115200 8N1.

Opening the case
----------------

Opening the case is not a nice task, as itis glued together. Insert a
flat knife between the front and back casing below the ethernet port.
Open up a gap this way and insert a flat scredriver, remove the knife.

Work your way around the casing by applying force to seperate the front
and back casing. This losens the glue and opens the plastic clips. Be
gentle, as these clips are very cheap and break quickly.

Installation
------------

1. Connect to the booted device at 192.168.1.20 using username/password
   "ubnt".

2. Transfer the OpenWrt sysupgrade image to the device using SCP.

3. Check the mtd partition number for bs / kernel0 / kernel1

   $ cat /proc/mtd

4. Set the bootselect flag to boot from kernel0

   $ dd if=/dev/zero bs=1 count=1 of=/dev/mtdblock6

5. Write the OpenWrt sysupgrade image to both kernel0 as well as kernel1

   $ dd if=openwrt.bin of=/dev/mtdblock8
   $ dd if=openwrt.bin of=/dev/mtdblock9

6. Reboot the device. It should boot into OpenWrt.

Signed-off-by: David Bauer <[email protected]>

target/linux/mediatek/base-files/lib/preinit/05_set_preinit_iface

@@ -1,6 +1,14 @@
 set_preinit_iface() {
 	ip link set eth0 up
-	ifname=lan1
+
+	case $(board_name) in
+	ubnt,unifi-6-lr)
+		ifname=eth0
+		;;
+	*)
+		ifname=lan1
+		;;
+	esac
 }
 
 boot_hook_add preinit_main set_preinit_iface

target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7622-ubnt-unifi-6-lr.dts

@@ -0,0 +1,327 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+/dts-v1/;
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+
+#include "mt7622.dtsi"
+#include "mt6380.dtsi"
+
+/ {
+	model = "Ubiquiti UniFi 6 LR";
+	compatible = "ubnt,unifi-6-lr", "mediatek,mt7622";
+
+	aliases {
+		led-boot = &led_blue;
+		led-failsafe = &led_blue;
+		led-running = &led_blue;
+		led-upgrade = &led_blue;
+		label-mac-device = &gmac0;
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+		bootargs = "earlycon=uart8250,mmio32,0x11002000 swiotlb=512 console=ttyS0,115200n8";
+	};
+
+	cpus {
+		cpu@0 {
+			proc-supply = <&mt6380_vcpu_reg>;
+			sram-supply = <&mt6380_vm_reg>;
+		};
+
+		cpu@1 {
+			proc-supply = <&mt6380_vcpu_reg>;
+			sram-supply = <&mt6380_vm_reg>;
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&pio 62 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	memory {
+		reg = <0 0x40000000 0 0x3f000000>;
+	};
+
+	reg_1p8v: regulator-1p8v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-1.8V";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-always-on;
+	};
+
+	reg_3p3v: regulator-3p3v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+};
+
+&pcie0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie0_pins>;
+	status = "okay";
+};
+
+&slot0 {
+	wifi@0,0 {
+		reg = <0x0 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x20000>;
+		mtd-mac-address = <&eeprom 0x6>;
+		ieee80211-freq-limit = <5000000 6000000>;
+	};
+};
+
+&pio {
+	eth_pins: eth-pins {
+		mux {
+			function = "eth";
+			groups = "mdc_mdio", "rgmii_via_gmac2";
+		};
+	};
+
+	pcie0_pins: pcie0-pins {
+		mux {
+			function = "pcie";
+			groups = "pcie0_pad_perst",
+				 "pcie0_1_waken",
+				 "pcie0_1_clkreq";
+		};
+	};
+
+	pcie1_pins: pcie1-pins {
+		mux {
+			function = "pcie";
+			groups = "pcie1_pad_perst",
+				 "pcie1_0_waken",
+				 "pcie1_0_clkreq";
+		};
+	};
+
+	pmic_bus_pins: pmic-bus-pins {
+		mux {
+			function = "pmic";
+			groups = "pmic_bus";
+		};
+	};
+
+	spi_nor_pins: spi-nor-pins {
+		mux {
+			function = "flash";
+			groups = "spi_nor";
+		};
+	};
+
+	uart0_pins: uart0-pins {
+		mux {
+			function = "uart";
+			groups = "uart0_0_tx_rx" ;
+		};
+	};
+
+	uart3_pins: uart3-pins {
+		mux {
+			function = "uart";
+			groups = "uart3_1_tx_rx" ;
+		};
+	};
+
+	i2c0_pins: i2c0-pins {
+		mux {
+			function = "i2c";
+			groups =  "i2c0";
+		};
+	};
+
+	watchdog_pins: watchdog-pins {
+		mux {
+			function = "watchdog";
+			groups = "watchdog";
+		};
+	};
+};
+
+&bch {
+	status = "okay";
+};
+
+&btif {
+	status = "disabled";
+};
+
+&eth {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&eth_pins>;
+
+	gmac0: mac@0 {
+		compatible = "mediatek,eth-mac";
+		reg = <0>;
+
+		phy-mode = "2500base-x";
+		mtd-mac-address = <&eeprom 0x0>;
+
+		fixed-link {
+			speed = <2500>;
+			full-duplex;
+		};
+	};
+
+	mdio: mdio-bus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ethernet-phy@8 {
+			/* Marvell AQRate AQR112W - no driver */
+			compatible = "ethernet-phy-ieee802.3-c45";
+			reg = <0x8>;
+		};
+	};
+};
+
+&pwrap {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pmic_bus_pins>;
+
+	status = "okay";
+};
+
+&nor_flash {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi_nor_pins>;
+
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "preloader";
+				reg = <0x0 0x40000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "atf";
+				reg = <0x40000 0x20000>;
+				read-only;
+			};
+
+			partition@60000 {
+				label = "u-boot";
+				reg = <0x60000 0x60000>;
+				read-only;
+			};
+
+			partition@c0000 {
+				label = "u-boot-env";
+				reg = <0xc0000 0x10000>;
+			};
+
+			factory: partition@d0000 {
+				label = "factory";
+				reg = <0xd0000 0x40000>;
+				read-only;
+			};
+
+			eeprom: partition@110000 {
+				label = "eeprom";
+				reg = <0x110000 0x10000>;
+				read-only;
+			};
+
+			partition@120000 {
+				label = "bs";
+				reg = <0x120000 0x10000>;
+			};
+
+			partition@130000 {
+				label = "cfg";
+				reg = <0x130000 0x100000>;
+				read-only;
+			};
+
+			partition@230000 {
+				compatible = "denx,fit";
+				label = "firmware";
+				reg = <0x230000 0x1ee0000>;
+			};
+
+			partition@2110000 {
+				label = "kernel1";
+				reg = <0x2110000 0x1ee0000>;
+			};
+		};
+	};
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pins>;
+	status = "okay";
+};
+
+&uart3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart3_pins>;
+	status = "okay";
+
+	/* MT7915 Bluetooth */
+};
+
+&i2c0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c0_pins>;
+	status = "okay";
+
+	led-controller@30 {
+		compatible = "ubnt,ledbar";
+		reg = <0x30>;
+
+		enable-gpio = <&pio 59 0>;
+
+		red {
+			label = "red";
+		};
+
+		green {
+			label = "green";
+		};
+
+		led_blue: blue {
+			label = "blue";
+		};
+	};
+};
+
+&watchdog {
+	pinctrl-names = "default";
+	pinctrl-0 = <&watchdog_pins>;
+	status = "okay";
+};
+
+&wmac {
+	mediatek,mtd-eeprom = <&factory 0x0>;
+	mtd-mac-address = <&eeprom 0x0>;
+	status = "okay";
+};

target/linux/mediatek/image/mt7622.mk

@@ -58,3 +58,12 @@ define Device/mediatek_mt7622-ubi
   DEVICE_PACKAGES := kmod-usb-ohci kmod-usb2 kmod-usb3 kmod-ata-ahci-mtk
 endef
 TARGET_DEVICES += mediatek_mt7622-ubi
+
+define Device/ubnt_unifi-6-lr
+  DEVICE_VENDOR := Ubiquiti
+  DEVICE_MODEL := UniFi 6 LR
+  DEVICE_DTS := mt7622-ubnt-unifi-6-lr
+  DEVICE_DTS_DIR := $(DTS_DIR)/mediatek
+  DEVICE_PACKAGES := kmod-mt7915e
+endef
+TARGET_DEVICES += ubnt_unifi-6-lr

target/linux/mediatek/mt7622/base-files/etc/board.d/02_network

@@ -16,6 +16,9 @@ mediatek_setup_interfaces()
 	mediatek,mt7622-rfb1)
 		ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4" wan
 		;;
+	ubnt,unifi-6-lr)
+		ucidef_set_interfaces_lan "eth0"
+		;;
 	*)
 		ucidef_add_switch "switch0" \
 				  "0:lan" "1:lan" "2:lan" "3:lan" "4:wan" "6u@eth0" "5u@eth1"

target/linux/mediatek/mt7622/config-5.4

@@ -333,6 +333,10 @@ CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
 CONFIG_HOLES_IN_ZONE=y
 CONFIG_HZ=250
 CONFIG_HZ_250=y
+CONFIG_I2C=y
+CONFIG_I2C_BOARDINFO=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_MT65XX=y
 CONFIG_ICPLUS_PHY=y
 CONFIG_IIO=y
 CONFIG_IKCONFIG=y
@@ -536,7 +540,7 @@ CONFIG_SPI=y
 CONFIG_SPI_MASTER=y
 CONFIG_SPI_MEM=y
 CONFIG_SPI_MT65XX=y
-# CONFIG_SPI_MTK_NOR is not set
+CONFIG_SPI_MTK_NOR=y
 CONFIG_SPI_MTK_SNFI=y
 CONFIG_SRCU=y
 CONFIG_SWCONFIG=y

target/linux/mediatek/patches-5.4/1020-spi-nor-w25q512jv.patch

@@ -0,0 +1,25 @@
+From: David Bauer <[email protected]>
+Date: Thu, 11 Feb 2021 19:57:26 +0100
+Subject: [PATCH] mtd: spi-nor: add support for Winbond W25Q512
+
+The Winbond W25Q512 is a 512mb SPI-NOR chip. It supports 4K sectors as
+well as block protection and Dual-/Quad-read.
+
+Tested on: Ubiquiti UniFi 6 LR
+
+Signed-off-by: David Bauer <[email protected]>
+
+Ref: https://patchwork.ozlabs.org/project/linux-mtd/patch/[email protected]/
+
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -2550,6 +2550,9 @@ static const struct flash_info spi_nor_i
+ 			  .fixups = &w25q256_fixups },
+ 	{ "w25q256jvm", INFO(0xef7019, 0, 64 * 1024, 512,
+ 			     SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
++	{ "w25q512jv", INFO(0xef4020, 0, 64 * 1024, 1024,
++			SECT_4K | SPI_NOR_QUAD_READ | SPI_NOR_DUAL_READ |
++			SPI_NOR_HAS_TB | SPI_NOR_HAS_LOCK) },
+ 	{ "w25m512jv", INFO(0xef7119, 0, 64 * 1024, 1024,
+ 			SECT_4K | SPI_NOR_QUAD_READ | SPI_NOR_DUAL_READ) },
+