mvebu: add support for Buffalo LinkStation LS220DE

The Buffalo LinkStation LS220DE is a dual bay NAS, based on Marvell
Armada 370

Hardware:
   SoC:         Marvell Armada 88F6707
   CPU:         Cortex-A9 800 MHz, 1 core
   Flash 1:     SPI-NOR 1 MiB (U-Boot)
   Flash 2:     NAND 512 MiB (OS)
   RAM:         DDR3 256 MiB
   Ethernet:    1x 1GbE
   USB:         1x 2.0
   SATA:        2x 3Gb/s
   LEDs/Input:  5x / 2x (1x button, 1x slide-switch)
   Fan:         1x casing

Flash instructions, from hard drive:
  1. Get access to the "boot" partition at the hard drive where the stock
     firmware is installed. It can be done with acp-commander or by
     plugging the hard drive to a computer.
  2. Backup the stock uImage:
         mv /boot/uImage.buffalo /boot/uImage.buffalo.bak
  3. Move and rename the Openwrt initramfs image to the boot partition:
         mv openwrt-initramfs-kernel.bin /boot/uImage.buffalo
  4. Power on the Linkstation with the hardrive inside. Now Openwrt will
     boot, but still not installed.
  5. Connect via ssh to OpenWrt:
         ssh root@192.168.1.1
  6. Rename boot files inside boot partition
         mount -t ext3 /dev/sda1 /mnt
         mv /mnt/uImage.buffalo /mnt/uImage.buffalo.openwrt.bak
         mv /mnt/initrd.buffalo /mnt/initrd.buffalo.bak
  7. Format ubi partitions at the NAND flash ("kernel_ubi" and "ubi"):
         ubiformat /dev/mtd0 -y
         ubidetach -p /dev/mtd1
         ubiformat /dev/mtd1 -y
  8. Flash the sysupgrade image:
         sysupgrade -n openwrt-squashfs-sysupgrade.bin
  9. Wait until it finish, the device will reboot with OpenWrt installed
     on the NAND flash.

Restore the stock firmware:
  1. Take the hard drive used for the installation and restore boot backup
     files to their original names:
         mount -t ext3 /dev/sda1 /mnt
         mv /mnt/uImage.buffalo.bak /mnt/uImage.buffalo
         mv /mnt/initrd.buffalo.bak /mnt/initrd.buffalo
  2. Boot from the hard drive and perform a stock firmware update using
     the Buffalo utility. The NAND will be restored to the original
     state.

Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com>

package/boot/uboot-envtools/files/mvebu

@@ -13,6 +13,7 @@ touch /etc/config/ubootenv
 board=$(board_name)
 
 case "$board" in
+buffalo,ls220de|\
 buffalo,ls421de)
 	ubootenv_add_uci_config "/dev/mtd3" "0x0" "0x10000"
 	;;

target/linux/mvebu/cortexa9/base-files/etc/board.d/02_network

@@ -61,6 +61,7 @@ mvebu_setup_macs()
 	local label_mac=""
 
 	case "$board" in
+	buffalo,ls220de|\
 	buffalo,ls421de)
 		lan_mac=$(mtd_get_mac_ascii u-boot-env eth1addr)
 		;;

target/linux/mvebu/cortexa9/base-files/lib/upgrade/platform.sh

@@ -25,6 +25,13 @@ platform_check_image() {
 
 platform_do_upgrade() {
 	case "$(board_name)" in
+	buffalo,ls220de)
+		# Kernel UBI volume name must be "boot"
+		CI_KERNPART=boot
+		CI_KERN_UBIPART=ubi_kernel
+		CI_ROOT_UBIPART=ubi
+		nand_do_upgrade "$1"
+		;;
 	buffalo,ls421de)
 		nand_do_upgrade "$1"
 		;;

target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls220de.dts

@@ -0,0 +1,380 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT)
+/*
+ * Device Tree file for Buffalo LinkStation LS220DE
+ *
+ * Copyright (C) 2023 Daniel González Cabanelas <dgcbueu@gmail.com>
+ */
+
+/dts-v1/;
+
+#include "armada-370.dtsi"
+#include "mvebu-linkstation-fan.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/thermal/thermal.h>
+
+/ {
+	model = "Buffalo LinkStation LS220DE";
+	compatible = "buffalo,ls220de", "marvell,armada370", "marvell,armada-370-xp";
+
+	aliases {
+		led-boot = &led_boot;
+		led-failsafe = &led_failsafe;
+		led-running = &led_power;
+		led-upgrade = &led_upgrade;
+	};
+
+	chosen {
+		bootargs = "earlycon";
+		stdout-path = "serial0:115200n8";
+		append-rootblock = "nullparameter="; /* override the bootloader args */
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x00000000 0x10000000>; /* 256 MB */
+	};
+
+	soc {
+		ranges = <MBUS_ID(0xf0, 0x01) 0 0xd0000000 0x100000
+			  MBUS_ID(0x01, 0xe0) 0 0xfff00000 0x100000
+			  MBUS_ID(0x09, 0x01) 0 0xf1100000 0x10000>;
+	};
+
+	system_fan: gpio_fan {
+		gpios = <&gpio0 13 GPIO_ACTIVE_HIGH
+			 &gpio0 14 GPIO_ACTIVE_HIGH>;
+		alarm-gpios = <&gpio0 10 GPIO_ACTIVE_HIGH>;
+
+		#cooling-cells = <2>;
+	};
+
+	thermal-zones {
+		hdd-thermal {
+			polling-delay = <20000>;
+			polling-delay-passive = <2000>;
+
+			thermal-sensors = <&hdd0_temp>; /* only one drivetemp sensor is supported */
+
+			trips {
+				hdd_alert1: trip1 {
+					temperature = <34000>;
+					hysteresis = <2000>;
+					type = "active";
+				};
+				hdd_alert2: trip2 {
+					temperature = <40000>;
+					hysteresis = <2000>;
+					type = "active";
+				};
+				hdd_alert3: trip3 {
+					temperature = <45000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+				hdd_hot {
+					temperature = <50000>;
+					hysteresis = <2000>;
+					type = "hot";
+				};
+				hdd_crit {
+					temperature = <60000>;
+					hysteresis = <2000>;
+					type = "critical";
+				};
+			};
+
+			cooling-maps {
+				map1 {
+					trip = <&hdd_alert1>;
+					cooling-device = <&system_fan THERMAL_NO_LIMIT 1>;
+				};
+				map2 {
+					trip = <&hdd_alert2>;
+					cooling-device = <&system_fan 2 2>;
+				};
+				map3 {
+					trip = <&hdd_alert3>;
+					cooling-device = <&system_fan 3 THERMAL_NO_LIMIT>;
+				};
+			};
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+		pinctrl-0 = <&pmx_buttons>;
+		pinctrl-names = "default";
+
+		power {
+			label = "Power Switch";
+			linux,code = <KEY_POWER>;
+			linux,input-type = <EV_SW>;
+			gpios = <&gpio0 15 GPIO_ACTIVE_LOW>;
+		};
+
+		function {
+			label = "Function Button";
+			linux,code = <KEY_CONFIG>;
+			gpios = <&gpio0 16 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	gpio_leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pmx_leds1 &pmx_leds2>;
+
+		indicator_red {
+			function = LED_FUNCTION_INDICATOR;
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
+			panic-indicator;
+		};
+
+		led_power: power_white {
+			label = "white:power";
+			function = LED_FUNCTION_POWER;
+			color = <LED_COLOR_ID_WHITE>;
+			gpios = <&gpio1 22 GPIO_ACTIVE_HIGH>;
+			default-state = "on";
+		};
+
+		led_failsafe: power_red {
+			label = "red:power";
+			function = LED_FUNCTION_POWER;
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&gpio1 23 GPIO_ACTIVE_HIGH>;
+		};
+
+		led_upgrade: power_orange {
+			label = "amber:power";
+			function = LED_FUNCTION_POWER;
+			color = <LED_COLOR_ID_AMBER>;
+			gpios = <&gpio1 25 GPIO_ACTIVE_HIGH>;
+		};
+
+		led_boot: indicator_white {
+			label = "white:indicator";
+			function = LED_FUNCTION_INDICATOR;
+			color = <LED_COLOR_ID_WHITE>;
+			gpios = <&gpio1 27 GPIO_ACTIVE_HIGH>;
+		};
+
+		hdd1_red {
+			function = LED_FUNCTION_DISK;
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&gpio1 29 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "ata1";
+			function-enumerator = <1>;
+		};
+
+		hdd2_red {
+			function = LED_FUNCTION_DISK;
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&gpio1 30 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "ata2";
+			function-enumerator = <2>;
+		};
+	};
+
+	regulators {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		pinctrl-0 = <&pmx_power_hdd1 &pmx_power_hdd2>;
+		pinctrl-names = "default";
+
+		sata1_power: regulator@1 {
+			compatible = "regulator-fixed";
+			reg = <1>;
+			regulator-name = "HDD1";
+			regulator-min-microvolt = <12000000>;
+			regulator-max-microvolt = <12000000>;
+			startup-delay-us = <2000000>;
+			enable-active-high;
+			regulator-always-on;
+			regulator-boot-on;
+			gpio = <&gpio0 8 GPIO_ACTIVE_HIGH>;
+		};
+
+		sata2_power: regulator@2 {
+			compatible = "regulator-fixed";
+			reg = <2>;
+			regulator-name = "HDD2";
+			regulator-min-microvolt = <12000000>;
+			regulator-max-microvolt = <12000000>;
+			startup-delay-us = <4000000>;
+			enable-active-high;
+			regulator-always-on;
+			regulator-boot-on;
+			gpio = <&gpio0 2 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&coherencyfab {
+	broken-idle;
+};
+
+&eth1 {
+	pinctrl-0 = <&ge1_rgmii_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+	phy-handle = <&ethphy0>;
+	phy-connection-type = "rgmii-id";
+};
+
+&mdio {
+	pinctrl-0 = <&mdio_pins>;
+	pinctrl-names = "default";
+
+	ethphy0: ethernet-phy@0 { /* Marvell 88E1318 */
+		reg = <0>;
+		marvell,reg-init = <0x3 0x10 0xf000 0x091A>, /* LED function */
+				   <0x3 0x11 0x0000 0x4401>, /* LED polarity */
+				   <0x3 0x12 0x0000 0x4905>; /* LED timer */
+		#thermal-sensor-cells = <0>;
+	};
+};
+
+&nand_controller {
+	status = "okay";
+
+	nand@0 {
+		reg = <0>;
+		label = "pxa3xx_nand-0";
+		nand-rb = <0>;
+		marvell,nand-keep-config;
+		nand-on-flash-bbt;
+		nand-ecc-strength = <4>;
+		nand-ecc-step-size = <512>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "ubi_kernel";
+				reg = <0x00000000 0x02000000>; /* 32 MiB */
+			};
+
+			partition@2000000 {
+				label = "ubi";
+				reg = <0x02000000 0x1df00000>; /* 479 MiB */
+			};
+		};
+	};
+};
+
+&sata {
+	nr-ports = <2>;
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	hdd0_temp: sata-port@0 {
+		reg = <0>;
+		#thermal-sensor-cells = <0>;
+	};
+
+	hdd1_temp: sata-port@1 {
+		reg = <1>;
+		#thermal-sensor-cells = <0>;
+	};
+};
+
+&spi0 {
+	status = "okay";
+	pinctrl-0 = <&spi0_pins2>;
+	pinctrl-names = "default";
+
+	spi-flash@0 {
+		compatible = "mxicy,mx25l8005", "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				reg = <0x00000 0xf0000>; /* 960 KiB*/
+				label = "u-boot";
+				read-only;
+			};
+			partition@f0000 {
+				reg = <0xf0000 0x10000>; /* 64 KiB */
+				label = "u-boot-env";
+			};
+		};
+	};
+};
+
+&pmsu {
+	pinctrl-0 = <&pmx_power_cpu>;
+	pinctrl-names = "default";
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&usb0 {
+	status = "okay";
+};
+
+&pinctrl {
+	pmx_power_hdd2: pmx-power-hdd2 {
+		marvell,pins = "mpp2";
+		marvell,function = "gpio";
+	};
+
+	pmx_power_cpu: pmx-power-cpu {
+		marvell,pins = "mpp4";
+		marvell,function = "vdd";
+	};
+
+	pmx_power_hdd1: pmx-power-hdd1 {
+		marvell,pins = "mpp8";
+		marvell,function = "gpio";
+	};
+
+	pmx_fan_lock: pmx-fan-lock {
+		marvell,pins = "mpp10";
+		marvell,function = "gpio";
+	};
+
+	pmx_hdd_present: pmx-hdd-present {
+		marvell,pins = "mpp11", "mpp12";
+		marvell,function = "gpio";
+	};
+
+	pmx_fan_high: pmx-fan-high {
+		marvell,pins = "mpp13";
+		marvell,function = "gpio";
+	};
+
+	pmx_fan_low: pmx-fan-low {
+		marvell,pins = "mpp14";
+		marvell,function = "gpio";
+	};
+
+	pmx_buttons: pmx-buttons {
+		marvell,pins = "mpp15", "mpp16";
+		marvell,function = "gpio";
+	};
+
+	pmx_leds1: pmx-leds {
+		marvell,pins = "mpp7", "mpp54", "mpp59", "mpp61";
+		marvell,function = "gpo";
+	};
+
+	pmx_leds2: pmx-leds {
+		marvell,pins = "mpp55", "mpp57", "mpp62";
+		marvell,function = "gpio";
+	};
+};

target/linux/mvebu/image/Makefile

@@ -53,6 +53,16 @@ define Build/buffalo-kernel-jffs2
 	rm -rf $(KDIR)/kernel_jffs2 $@.fakerd
 endef
 
+define Build/buffalo-kernel-ubifs
+	rm -rf $@-ubidir
+	mkdir -p $@-ubidir
+	mv $@ $@-ubidir/uImage.buffalo
+	touch $@
+	$(call Build/append-uImage-fakehdr, ramdisk)
+	mv $@ $@-ubidir/initrd.buffalo
+	$(STAGING_DIR_HOST)/bin/mkfs.ubifs $(KERNEL_UBIFS_OPTS) -r $@-ubidir $@
+endef
+
 # Some info about Ctera firmware:
 # 1. It's simple tar file (GNU standard), but it must have ".firm" suffix.
 # 2. It contains two images: kernel and romdisk. Both are required.

target/linux/mvebu/image/cortexa9.mk

@@ -14,6 +14,21 @@ define Device/kernel-size-migration
 	Upgrade via sysupgrade mechanism is not possible, so new installation via factory style image is required.
 endef
 
+define Device/buffalo_ls220de
+  $(Device/NAND-128K)
+  DEVICE_VENDOR := Buffalo
+  DEVICE_MODEL := LinkStation LS220DE
+  KERNEL_UBIFS_OPTS = -m $$(PAGESIZE) -e 124KiB -c 172 -x none
+  KERNEL := kernel-bin | append-dtb | uImage none | buffalo-kernel-ubifs
+  KERNEL_INITRAMFS := kernel-bin | append-dtb | uImage none
+  DEVICE_DTS := armada-370-buffalo-ls220de
+  DEVICE_PACKAGES :=  \
+    kmod-hwmon-gpiofan kmod-hwmon-drivetemp kmod-linkstation-poweroff \
+    kmod-md-mod kmod-md-raid0 kmod-md-raid1 kmod-md-raid10 kmod-fs-xfs \
+    mdadm mkf2fs e2fsprogs partx-utils
+endef
+TARGET_DEVICES += buffalo_ls220de
+
 define Device/buffalo_ls421de
   $(Device/NAND-128K)
   DEVICE_VENDOR := Buffalo

target/linux/mvebu/patches-5.15/105-power-reset-linkstation-poweroff-add-ls220de.patch

@@ -0,0 +1,15 @@
+--- a/drivers/power/reset/linkstation-poweroff.c
++++ b/drivers/power/reset/linkstation-poweroff.c
+@@ -142,6 +142,12 @@ static void linkstation_poweroff(void)
+ }
+ 
+ static const struct of_device_id ls_poweroff_of_match[] = {
++	{ .compatible = "buffalo,ls220d",
++	  .data = &linkstation_power_off_cfg,
++	},
++	{ .compatible = "buffalo,ls220de",
++	  .data = &linkstation_power_off_cfg,
++	},
+ 	{ .compatible = "buffalo,ls421d",
+ 	  .data = &linkstation_power_off_cfg,
+ 	},