kirkwood: add support for Zyxel NSA310S

Zyxel NSA310S is a NAS based on Marvell kirkwood SoC.

Specification:
 - Processor Marvell 88F6702 1 GHz
 - 256MB RAM
 - 128MB NAND
 - 1x GBE LAN port (PHY: Marvell 88E1318)
 - 2x USB 2.0
 - 1x SATA
 - 3x button
 - 7x leds
 - serial on J1 connector (115200 8N1) (GND-NOPIN-RX-TX-VCC)

Known issues:
 - no kernel module for RTC. [*]
 - buzzer (connected to MPP43) need to be drived by 1kHz signal
 - no kernel module for internal MCU connected via I2C[**]

[*]
Karoly Pocsi made simple, unofficial driver for HT1382.
It can be found here:
https://www.madadmin.com/zyxel-nsa320s-es-debian-linux-4-resz/

[**]
Karoly Pocsi found how CPU talk with MCU:
It is possible to query the MCU-controlled fan speed and temperature:
i2cget -y 0x0 0x0a 0x07
i2cget -y 0x0 0x0a 0x08
The first value (0x07) is the temperature in ° C, the second (0x08) is
the time in milliseconds to complete one fan revolution (rpm = 60,000 / value).
Info translated from:
https://www.madadmin.com/zyxel-nsa320s-es-debian-linux-4-resz/

Installation:

TFTP:
1. Run serial console and go to u-boot.
2. Copy u-boot via tftp and write to NAND:
	=> mw 0x0800000 0xffff 0x100000
	=> nand erase 0x0 100000
	=> setenv ipaddr 192.168.1.2
	=> setenv serverip 192.168.1.4
	=> tftp 0x0800000 nsa310s-u-boot.kwb
	=> nand write 0x0800000 0x0 0x100000
	=> reset
3. Run new u-Boot, repair bootcmd and restore MAC address from sticker
	=> setenv ethaddr AA:BB:CC:DD:EE:FF
	=> saveenv
4. Copy and run initramfs image
	=> setenv ipaddr 192.168.1.2
	=> setenv serverip 192.168.1.4
	=> tftpboot zyxel_nsa310s-initramfs-uImage
	=> bootm 0x800000
5. Download sysupgrade image and perform sysupgrade

USB:

1. Prepare usb fat32 drive with u-boot.kwb and initramfs image.
   Stick it to USB 2.0 port.
2. Run serial console and go to u-boot.
3. Copy u-boot from usb and write to NAND:
	=> mw 0x0800000 0xffff 0x100000
	=> nand erase 0x0 100000
	=> usb start
	=> fatload usb 0 0x0800000 u-boot.kwb
	=> nand write 0x0800000 0x0 0x100000
	=> reset
4. Run new u-Boot, repair bootcmd and restore MAC address from sticker
	=> setenv ethaddr AA:BB:CC:DD:EE:FF
	=> saveenv
5. Copy and run initramfs image:
	=> usb start
	=> fatload usb 0 0x0800000 initramfs-uImage
	=> bootm 0x800000
6. Download sysupgrade image and perform sysupgrade.

Based on work ThBexx <thomas.beckler@hotmail.com>
DTS based on dropped support in 0ebdf0c.

Tested-by: Lech Perczak <lech.perczak@gmail.com>
Reviewed-by: Lech Perczak <lech.perczak@gmail.com>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
[NSA310s -> NSA310S in DEVICE_MODEL]
Signed-off-by: Petr Štetiar <ynezz@true.cz>

4 files changed, 282 insertions, 1 deletions

diff --git a/target/linux/kirkwood/base-files/etc/board.d/02_network b/target/linux/kirkwood/base-files/etc/board.d/02_network
index df01b0bb1b..a86c57117d 100755
--- a/target/linux/kirkwood/base-files/etc/board.d/02_network
+++ b/target/linux/kirkwood/base-files/etc/board.d/02_network
@@ -21,7 +21,8 @@ case "$board" in
 "raidsonic,ib-nas62x0"|\
 "seagate,dockstar"|\
 "seagate,goflexhome"|\
-"seagate,goflexnet")
+"seagate,goflexnet"|\
+"zyxel,nsa310s")
 	ucidef_set_interface_lan "eth0" "dhcp"
 	;;
 "linksys,audi"|\
diff --git a/target/linux/kirkwood/config-5.4 b/target/linux/kirkwood/config-5.4
index 6b68649d74..5529bf89df 100644
--- a/target/linux/kirkwood/config-5.4
+++ b/target/linux/kirkwood/config-5.4
@@ -212,6 +212,7 @@ CONFIG_LZO_DECOMPRESS=y
 CONFIG_MACH_KIRKWOOD=y
 CONFIG_MACH_MVEBU_ANY=y
 CONFIG_MANGLE_BOOTARGS=y
+CONFIG_MARVELL_PHY=y
 CONFIG_MDIO_BUS=y
 CONFIG_MDIO_DEVICE=y
 CONFIG_MEMFD_CREATE=y
diff --git a/target/linux/kirkwood/files-5.4/arch/arm/boot/dts/kirkwood-nsa310s.dts b/target/linux/kirkwood/files-5.4/arch/arm/boot/dts/kirkwood-nsa310s.dts
new file mode 100644
index 0000000000..fe892ffdc2
--- /dev/null
+++ b/target/linux/kirkwood/files-5.4/arch/arm/boot/dts/kirkwood-nsa310s.dts
@@ -0,0 +1,271 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+#include "kirkwood.dtsi"
+#include "kirkwood-6281.dtsi"
+
+/ {
+	model = "ZyXEL NSA310S";
+	compatible = "zyxel,nsa310s", "marvell,kirkwood-88f6702", "marvell,kirkwood";
+
+	aliases {
+		led-boot = &led_green_sys;
+		led-failsafe = &led_red_sys;
+		led-running = &led_green_sys;
+		led-upgrade = &led_red_sys;
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x00000000 0x10000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200n8 earlyprintk";
+		stdout-path = &uart0;
+	};
+
+	ocp@f1000000 {
+		pinctrl: pin-controller@10000 {
+			pinctrl-names = "default";
+
+			pmx_usb_power: pmx-usb-power {
+				marvell,pins = "mpp21";
+				marvell,function = "gpio";
+			};
+
+			pmx_pwr_off: pmx-pwr-off {
+				marvell,pins = "mpp27";
+				marvell,function = "gpio";
+			};
+
+			pmx_btn_reset: pmx-btn-reset {
+				marvell,pins = "mpp24";
+				marvell,function = "gpio";
+			};
+
+			pmx_btn_copy: pmx-btn-copy {
+				marvell,pins = "mpp25";
+				marvell,function = "gpio";
+			};
+
+			pmx_btn_power: pmx-btn-power {
+				marvell,pins = "mpp26";
+				marvell,function = "gpio";
+			};
+
+			pmx_led_usb_green: pmx-led-usb-green {
+				marvell,pins = "mpp15";
+				marvell,function = "gpio";
+			};
+
+			pmx_led_copy_green: pmx-led-copy-green {
+				marvell,pins = "mpp22";
+				marvell,function = "gpio";
+			};
+
+			pmx_led_copy_red: pmx-led-copy-red {
+				marvell,pins = "mpp23";
+				marvell,function = "gpio";
+			};
+
+			pmx_led_sys_green: pmx-led-sys-green {
+				marvell,pins = "mpp28";
+				marvell,function = "gpio";
+			};
+
+			pmx_led_sys_red: pmx-led-sys-red {
+				marvell,pins = "mpp29";
+				marvell,function = "gpio";
+			};
+
+			pmx_led_hdd1_green: pmx-led-hdd1-green {
+				marvell,pins = "mpp16";
+				marvell,function = "gpio";
+			};
+
+			pmx_led_hdd1_red: pmx-led-hdd1-red {
+				marvell,pins = "mpp13";
+				marvell,function = "gpio";
+			};
+
+			pmx_pwr_sata1: pmx-pwr-sata1 {
+				marvell,pins = "mpp33";
+				marvell,function = "gpio";
+			};
+
+		};
+
+		i2c@11000 {
+			status = "okay";
+
+			rtc@68 {
+				compatible = "htk,ht1382";
+				reg = <0x68>;
+			};
+		};
+
+		serial@12000 {
+			status = "okay";
+		};
+	};
+
+	regulators {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		pinctrl-0 = <&pmx_usb_power &pmx_pwr_sata1>;
+		pinctrl-names = "default";
+
+		usb0_power: regulator@1 {
+			compatible = "regulator-fixed";
+			reg = <1>;
+			regulator-name = "USB Power";
+			regulator-min-microvolt = <5000000>;
+			regulator-max-microvolt = <5000000>;
+			regulator-always-on;
+			regulator-boot-on;
+			gpio = <&gpio0 21 GPIO_ACTIVE_HIGH>;
+		};
+
+		sata1_power: regulator@2 {
+			compatible = "regulator-fixed";
+			reg = <2>;
+			regulator-name = "SATA1 Power";
+			regulator-min-microvolt = <5000000>;
+			regulator-max-microvolt = <5000000>;
+			regulator-always-on;
+			regulator-boot-on;
+			gpio = <&gpio1 1 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		pinctrl-0 = <&pmx_btn_reset &pmx_btn_copy &pmx_btn_power>;
+		pinctrl-names = "default";
+
+		power {
+			label = "Power Button";
+			linux,code = <KEY_POWER>;
+			gpios = <&gpio0 26 GPIO_ACTIVE_HIGH>;
+		};
+
+		copy {
+			label = "Copy Button";
+			linux,code = <KEY_COPY>;
+			gpios = <&gpio0 25 GPIO_ACTIVE_LOW>;
+		};
+
+		reset {
+			label = "Reset Button";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio0 24 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_green_sys: green-sys {
+			label = "nsa310s:green:sys";
+			gpios = <&gpio0 28 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "default-on";
+		};
+
+		led_red_sys: red-sys {
+			label = "nsa310s:red:sys";
+			gpios = <&gpio0 29 GPIO_ACTIVE_HIGH>;
+		};
+
+		green-hdd1 {
+			label = "nsa310s:green:hdd1";
+			gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "ata1";
+		};
+
+		red-hdd1 {
+			label = "nsa310s:red:hdd1";
+			gpios = <&gpio0 13 GPIO_ACTIVE_HIGH>;
+		};
+
+		green-usb {
+			label = "nsa310s:green:usb";
+			gpios = <&gpio0 15 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "usb-host";
+		};
+
+		green-copy {
+			label = "nsa310s:green:copy";
+			gpios = <&gpio0 22 GPIO_ACTIVE_HIGH>;
+		};
+
+		red-copy {
+			label = "nsa310s:red:copy";
+			gpios = <&gpio0 23 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	gpio_poweroff {
+		compatible = "gpio-poweroff";
+		pinctrl-0 = <&pmx_pwr_off>;
+		pinctrl-names = "default";
+		gpios = <&gpio0 27 GPIO_ACTIVE_HIGH>;
+	};
+};
+
+
+&eth0 {
+	status = "okay";
+
+	ethernet0-port@0 {
+		phy-handle = <&ethphy0>;
+	};
+};
+
+&mdio {
+	status = "okay";
+
+	ethphy0: ethernet-phy@1 {
+		reg = <1>;
+		phy-mode = "rgmii-id";
+		marvell,reg-init = <0x1 0x16 0x0 0x3>,
+				   <0x1 0x10 0x0 0x1017>,
+				   <0x1 0x11 0x0 0x4408>,
+				   <0x1 0x16 0x0 0x0>;
+	};
+};
+
+&nand {
+	status = "okay";
+	chip-delay = <35>;
+
+	partition@0 {
+		label = "uboot";
+		reg = <0x0000000 0x00c0000>;
+		read-only;
+	};
+	partition@c0000 {
+		label = "uboot_env";
+		reg = <0x00c0000 0x0080000>;
+	};
+	partition@140000 {
+		label = "ubi";
+		reg = <0x0140000 0x7ec0000>;
+	};
+};
+
+&pciec {
+        status = "okay";
+};
+
+&pcie0 {
+	status = "okay";
+};
+
+&sata {
+	status = "okay";
+	nr-ports = <1>;
+};
diff --git a/target/linux/kirkwood/image/Makefile b/target/linux/kirkwood/image/Makefile
index 87e0627a63..8cc69195b4 100644
--- a/target/linux/kirkwood/image/Makefile
+++ b/target/linux/kirkwood/image/Makefile
@@ -148,6 +148,14 @@ define Device/zyxel_nsa310b
 endef
 TARGET_DEVICES += zyxel_nsa310b
 
+define Device/zyxel_nsa310s
+  DEVICE_VENDOR := ZyXEL
+  DEVICE_MODEL := NSA310S
+  DEVICE_PACKAGES := kmod-ata-marvell-sata kmod-fs-ext4 kmod-gpio-button-hotplug
+  DEVICE_DTS := kirkwood-nsa310s
+endef
+TARGET_DEVICES += zyxel_nsa310s
+
 define Device/zyxel_nsa325
   DEVICE_VENDOR := ZyXEL
   DEVICE_MODEL := NSA325