realtek: add support for Linksys LGS328C

Hardware specification
----------------------

* RTL9301 SoC, 1 MIPS 34KEc core @ 800MHz
* 512MB DRAM
* 2MB NOR Flash
* 128MB NAND Flash
* 24 x 10/100/1000BASE-T ports
* 4 x 10G SFP+ ports
* Power LED, Fault LED
* Reset button on front panel
* UART (115200 8N1) via RJ45

Installation using serial interface
-----------------------------------

1. Press "a" "c" "p" during message "Enter correct key to stop autoboot"
2. Start network "rtk network on"
3. Load image "tftpboot <TFTP IP>:openwrt-realtek-rtl930x_nand-linksys_lgs328c-initramfs-kernel.bin"
4. Boot image "bootm"
5. Switch to first bootpartition "fw_setsys bootpartition 0"
5. Download sysupgrade "scp <IP>:openwrt-realtek-rtl930x_nand-linksys_lgs328c-squashfs-sysupgrade.bin /tmp/."
6. Install sysupgrade "sysupgrade /tmp/openwrt-realtek-rtl930x_nand-linksys_lgs328c-squashfs-sysupgrade.bin"

Installation using OEM webinterface
-----------------------------------

This is not possible because the OpenWrt NAND Flash layout is different
from the vendor layout. To be precise. Vendor uses:

- 64 MB vendor UBI root_data
- 32 MB vendor kernel+root 1 (~19 MB used)
- 32 MB vendor kernel+root 2 (~19 MB used)

OpenWrt uses:

- 64 MB vendor UBI (not touched)
- 10 MB OpenWrt kernel
- 22 MB Openwrt mtd-concat UBI
- 23 MB vendor kernel 2 (space reduced, vendor data unchanged)
- 09 MB OpenWrt mtd-concat UBI

Dual-boot with stock firmware using writable u-boot-env
-------------------------------------------------------

From stock to OpenWrt / primary image 1 (CLI as admin):
   - > boot system image1
   - > reboot

From OpenWrt to stock / boot image 2: (shell as root)
   - # fw_setsys bootpartition 1
   - # reboot

Debrick using serial interface
------------------------------

1. Press "a" "c" "p" during message "Enter correct key to stop autoboot"
2. Load vendor image with "upgrade runtime <TFTP IP>:LGS328xxxxx.imag"
3. switch to primary partition "setsys bootpartition 0"
4. safe config "savesys"

Further documentation
---------------------
See https://openwrt.org/toh/linksys/lgs352c

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/20255
Signed-off-by: Robert Marko <robimarko@gmail.com>

4 files changed, 465 insertions, 0 deletions

diff --git a/target/linux/realtek/base-files/lib/upgrade/platform.sh b/target/linux/realtek/base-files/lib/upgrade/platform.sh
index f02bbd19f3..a112d90c06 100644
--- a/target/linux/realtek/base-files/lib/upgrade/platform.sh
+++ b/target/linux/realtek/base-files/lib/upgrade/platform.sh
@@ -39,6 +39,9 @@ platform_do_upgrade() {
 		tplink_sg2xxx_fix_mtdparts
 		default_do_upgrade "$1"
 		;;
+	linksys,lgs328c)
+		nand_do_upgrade "$1"
+		;;
 	*)
 		default_do_upgrade "$1"
 		;;
diff --git a/target/linux/realtek/dts/rtl9301_linksys_lgs328c.dts b/target/linux/realtek/dts/rtl9301_linksys_lgs328c.dts
new file mode 100644
index 0000000000..abb4aac78e
--- /dev/null
+++ b/target/linux/realtek/dts/rtl9301_linksys_lgs328c.dts
@@ -0,0 +1,268 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later or MIT)
+/dts-v1/;
+
+#include "rtl930x.dtsi"
+#include "rtl93xx_linksys_lgs3xxc_nand_common.dtsi"
+
+/ {
+	compatible = "linksys,lgs328c", "realtek,rtl9301-soc";
+	model = "Linksys LGS328C";
+};
+
+&i2c_mst1 {
+	status = "okay";
+
+	i2c2: i2c@2 {
+		reg = <2>;
+	};
+	i2c3: i2c@3 {
+		reg = <3>;
+	};
+	i2c4: i2c@4 {
+		reg = <4>;
+	};
+	i2c5: i2c@5 {
+		reg = <5>;
+	};
+};
+
+&sfp0 {
+	i2c-bus = <&i2c2>;
+};
+
+&sfp1 {
+	i2c-bus = <&i2c3>;
+};
+
+&sfp2 {
+	i2c-bus = <&i2c4>;
+};
+
+&sfp3 {
+	i2c-bus = <&i2c5>;
+};
+
+&mdio_aux {
+	status = "okay";
+	gpio1: expander@0 {
+		compatible = "realtek,rtl8231";
+		reg = <0>;
+
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-ranges = <&gpio1 0 0 37>;
+
+		led-controller {
+			compatible = "realtek,rtl8231-leds";
+			status = "disabled";
+		};
+	};
+};
+
+&mdio_bus0 {
+	phy0: ethernet-phy@0 {
+		reg = <0>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <0 0>;
+	};
+	phy1: ethernet-phy@1 {
+		reg = <1>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <0 1>;
+	};		
+	phy2: ethernet-phy@2 {
+		reg = <2>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <0 2>;
+	};		
+	phy3: ethernet-phy@3 {
+		reg = <3>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <0 3>;
+	};		
+	phy4: ethernet-phy@4 {
+		reg = <4>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <0 4>;
+	};		
+	phy5: ethernet-phy@5 {
+		reg = <5>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <0 5>;
+	};		
+	phy6: ethernet-phy@6 {
+		reg = <6>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <0 6>;
+	};		
+	phy7: ethernet-phy@7 {
+		reg = <7>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <0 7>;
+	};		
+	phy8: ethernet-phy@8 {
+		reg = <8>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <1 8>;
+	};
+	phy9: ethernet-phy@9 {
+		reg = <9>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <1 9>;
+	};
+	phy10: ethernet-phy@10 {
+		reg = <10>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <1 10>;
+	};
+	phy11: ethernet-phy@11 {
+		reg = <11>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <1 11>;
+	};
+	phy12: ethernet-phy@12 {
+		reg = <12>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <1 12>;
+	};
+	phy13: ethernet-phy@13 {
+		reg = <13>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <1 13>;
+	};
+	phy14: ethernet-phy@14 {
+		reg = <14>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <1 14>;
+	};
+	phy15: ethernet-phy@15 {
+		reg = <15>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <1 15>;
+	};
+	phy16: ethernet-phy@16 {
+		reg = <16>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <2 16>;
+	};
+	phy17: ethernet-phy@17 {
+		reg = <17>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <2 17>;
+	};		
+	phy18: ethernet-phy@18 {
+		reg = <18>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <2 18>;
+	};		
+	phy19: ethernet-phy@19 {
+		reg = <19>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <2 19>;
+	};		
+	phy20: ethernet-phy@20 {
+		reg = <20>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <2 20>;
+	};		
+	phy21: ethernet-phy@21 {
+		reg = <21>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <2 21>;
+	};		
+	phy22: ethernet-phy@22 {
+		reg = <22>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <2 22>;
+	};		
+	phy23: ethernet-phy@23 {
+		reg = <23>;
+		compatible = "ethernet-phy-ieee802.3-c22";
+		rtl9300,smi-address = <2 23>;
+	};	
+
+	INTERNAL_PHY(24)
+	INTERNAL_PHY(25)
+	INTERNAL_PHY(26)
+	INTERNAL_PHY(27)
+};
+
+&switch0 {
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		SWITCH_PORT_SDS(0, 1, 0, qsgmii)
+		SWITCH_PORT_SDS(1, 2, 0, qsgmii)
+		SWITCH_PORT_SDS(2, 3, 0, qsgmii)
+		SWITCH_PORT_SDS(3, 4, 0, qsgmii)
+		SWITCH_PORT_SDS(4, 5, 1, qsgmii)
+		SWITCH_PORT_SDS(5, 6, 1, qsgmii)
+		SWITCH_PORT_SDS(6, 7, 1, qsgmii)
+		SWITCH_PORT_SDS(7, 8, 1, qsgmii)
+		
+		SWITCH_PORT_SDS(8, 9, 2, usxgmii)
+		SWITCH_PORT_SDS(9, 10, 2, usxgmii)
+		SWITCH_PORT_SDS(10, 11, 2, usxgmii)
+		SWITCH_PORT_SDS(11, 12, 2, usxgmii)
+		SWITCH_PORT_SDS(12, 13, 2, usxgmii)
+		SWITCH_PORT_SDS(13, 14, 2, usxgmii)
+		SWITCH_PORT_SDS(14, 15, 2, usxgmii)
+		SWITCH_PORT_SDS(15, 16, 2, usxgmii)
+		
+		SWITCH_PORT_SDS(16, 17, 3, usxgmii)
+		SWITCH_PORT_SDS(17, 18, 3, usxgmii)
+		SWITCH_PORT_SDS(18, 19, 3, usxgmii)
+		SWITCH_PORT_SDS(19, 20, 3, usxgmii)
+		SWITCH_PORT_SDS(21, 22, 3, usxgmii)
+		SWITCH_PORT_SDS(22, 23, 3, usxgmii)
+		SWITCH_PORT_SDS(23, 24, 3, usxgmii)
+		
+		port@24 {
+			reg = <24>;
+			label = "lan25";
+			pcs-handle = <&serdes4>;
+			phy-handle = <&phy24>;
+			phy-mode = "1000base-x";
+			managed = "in-band-status";
+			sfp = <&sfp0>;
+		};
+		port@25 {
+			reg = <25>;
+			label = "lan26";
+			pcs-handle = <&serdes6>;
+			phy-handle = <&phy25>;
+			phy-mode = "1000base-x";
+			managed = "in-band-status";
+			sfp = <&sfp1>;
+		};
+		port@26 {
+			reg = <26>;
+			label = "lan27";
+			pcs-handle = <&serdes8>;
+			phy-handle = <&phy26>;
+			phy-mode = "1000base-x";
+			managed = "in-band-status";
+			sfp = <&sfp2>;
+		};
+		port@27 {
+			reg = <27>;
+			label = "lan28";
+			pcs-handle = <&serdes9>;
+			phy-handle = <&phy27>;
+			phy-mode = "1000base-x";
+			managed = "in-band-status";
+			sfp = <&sfp3>;
+		};
+		
+		port@28 {
+			reg = <28>;
+			ethernet = <&ethernet0>;
+			phy-mode = "internal";
+			fixed-link {
+				speed = <10000>;
+				full-duplex;
+			};
+		};
+	};
+};
diff --git a/target/linux/realtek/dts/rtl93xx_linksys_lgs3xxc_nand_common.dtsi b/target/linux/realtek/dts/rtl93xx_linksys_lgs3xxc_nand_common.dtsi
new file mode 100644
index 0000000000..f9c7c6d49d
--- /dev/null
+++ b/target/linux/realtek/dts/rtl93xx_linksys_lgs3xxc_nand_common.dtsi
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later or MIT)
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+	aliases {
+		led-boot = &led_power;
+		led-failsafe = &led_fault;
+		led-running = &led_power;
+		led-upgrade = &led_power;
+	};
+
+	keys {
+		compatible = "gpio-keys-polled";
+		poll-interval = <100>;
+
+		reset {
+			label = "reset";
+			gpios = <&gpio1 6 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinmux_disable_sys_led>;
+
+		led_power: led-0 {
+			label = "green:power";
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_POWER;
+			gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
+		};
+
+		led_fault: led-1 {
+			label = "amber:fault";
+			color = <LED_COLOR_ID_AMBER>;
+			function = LED_FUNCTION_FAULT;
+			gpios = <&gpio1 2 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x10000000>, /* 256 MiB lowmem */
+		      <0x90000000 0x10000000>; /* 256 MiB highmem */
+	};
+
+	sfp0: sfp-p49 {
+		compatible = "sff,sfp";
+		los-gpio = <&gpio1 11 GPIO_ACTIVE_HIGH>;
+		mod-def0-gpio = <&gpio1 12 GPIO_ACTIVE_LOW>;
+		tx-disable-gpio = <&gpio1 10 GPIO_ACTIVE_HIGH>;
+	};
+	sfp1: sfp-p50 {
+		compatible = "sff,sfp";
+		los-gpio = <&gpio1 14 GPIO_ACTIVE_HIGH>;
+		mod-def0-gpio = <&gpio1 21 GPIO_ACTIVE_LOW>;
+		tx-disable-gpio = <&gpio1 13 GPIO_ACTIVE_HIGH>;
+	};
+	sfp2: sfp-p51 {
+		compatible = "sff,sfp";
+		los-gpio = <&gpio1 23 GPIO_ACTIVE_HIGH>;
+		mod-def0-gpio = <&gpio1 25 GPIO_ACTIVE_LOW>;
+		tx-disable-gpio = <&gpio1 22 GPIO_ACTIVE_HIGH>;
+	};
+	sfp3: sfp-p52 {
+		compatible = "sff,sfp";
+		los-gpio = <&gpio1 27 GPIO_ACTIVE_HIGH>;
+		mod-def0-gpio = <&gpio1 28 GPIO_ACTIVE_LOW>;
+		tx-disable-gpio = <&gpio1 26 GPIO_ACTIVE_HIGH>;
+	};
+
+	ubi-concat {
+		compatible = "mtd-concat";
+		devices = <&ubiconcat0 &ubiconcat1>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "ubi";
+				reg = <0x0 0x1d00000>;
+			};
+		};
+	};
+};
+
+&ecc0 {
+	status = "okay";
+};
+
+&spi0 {
+        status = "okay";
+        flash@0 {
+                compatible = "jedec,spi-nor";
+                reg = <0>;
+                spi-max-frequency = <10000000>;
+
+                partitions {
+                        compatible = "fixed-partitions";
+                        #address-cells = <1>;
+                        #size-cells = <1>;
+
+                        partition@0 {
+                                label = "u-boot";
+                                reg = <0x0 0xe0000>;
+				read-only;
+                        };
+                        partition@e0000 {
+                                label = "u-boot-env";
+                                reg = <0xe0000 0x10000>;
+                        };
+                        partition@f0000 {
+                                label = "u-boot-env2";
+                                reg = <0xf0000 0x10000>;
+                        };
+                };
+        };
+};
+
+&snand {
+        status = "okay";
+        flash@0 {
+                compatible = "spi-nand";
+                reg = <0>;
+
+		nand-ecc-engine = <&ecc0>;
+		nand-ecc-strength = <6>;
+		nand-ecc-step-size = <512>;
+		nand-ecc-algo = "bch";
+		nand-ecc-placement = "oob";
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "vendor_ubi";
+				reg = <0x0 0x4000000>;
+				read-only;
+			};
+			partition@4000000 {
+				label = "kernel";
+				reg = <0x4000000 0xa00000>;
+			};
+			ubiconcat0: partition@4a00000 {
+				label = "ubiconcat0";
+				reg = <0x4a00000 0x1400000>;
+			};
+			partition@5e00000 {
+				label = "runtime2";
+				reg = <0x5e00000 0x1500000>;
+				read-only;
+			};
+			ubiconcat1: partition@7300000 {
+				label = "ubiconcat1";
+				reg = <0x7300000 0x900000>;
+			};
+		};
+        };
+};
diff --git a/target/linux/realtek/image/rtl930x_nand.mk b/target/linux/realtek/image/rtl930x_nand.mk
index a4e40e534e..662dc8d2ba 100644
--- a/target/linux/realtek/image/rtl930x_nand.mk
+++ b/target/linux/realtek/image/rtl930x_nand.mk
@@ -1 +1,27 @@
 # SPDX-License-Identifier: GPL-2.0-only
+
+include ./common.mk
+
+define Device/linksys_lgs328c
+  $(Device/uimage-rt-loader)
+  SOC := rtl9301
+  IMAGE_SIZE := 29696k
+  KERNEL_SIZE := 10240k
+  DEVICE_VENDOR := Linksys
+  DEVICE_MODEL := LGS328C
+  BELKIN_MODEL := BKS-RTL93xx
+  BELKIN_HEADER := 0x07600001
+  LINKSYS_MODEL := 60412040
+  PAGESIZE := 2048
+  BLOCKSIZE := 128k
+  UBINIZE_OPTS := -E 5
+  KERNEL := \
+	$$(KERNEL) | \
+	pad-to $$(BLOCKSIZE)
+  IMAGE/sysupgrade.bin := \
+	append-rootfs | \
+	pad-rootfs | \
+	sysupgrade-tar rootfs=$$$$@ | \
+	append-metadata
+endef
+TARGET_DEVICES += linksys_lgs328c