bmips: add support for Sagem F@ST3864OP

Specifications:
* SoC: BCM63168
* RAM: NT5CC64M16GP-DI, DDR3 128MiB
* NAND: W29N01HVSINA, 128MiB
* Ethernet: 4x1000M LAN, 1x 1000M WAN
* Serial interface: on board but not populated, 3.3V, 115200, 8N1

Notes:
* Use DSA for VLAN and switches
* Ethernet ports and USB works
* gpio-leds are not working
* WLAN, xDSL, and FXS are not going to work

Signed-off-by: Hang Zhou <929513338@qq.com>
[refactor, reorder, drop unneeded or not working stuff]
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

target/linux/bmips/bcm63268/base-files/etc/board.d/02_network

@@ -18,6 +18,7 @@ sercomm,h500-s-vfes)
 	uci add_list firewall.@zone[0].network='qtn'
 	;;
 comtrend,vg-8050 |\
+sagem,fast-3864-op |\
 sercomm,shg2500)
 	ucidef_set_bridge_device switch
 	ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4" "wan"

target/linux/bmips/bcm63268/base-files/lib/upgrade/platform.sh

@@ -10,7 +10,8 @@ platform_check_image() {
 platform_do_upgrade() {
 	case "$(board_name)" in
 	comtrend,vg-8050 |\
-	comtrend,vr-3032u)
+	comtrend,vr-3032u |\
+	sagem,fast-3864-op)
 		CI_JFFS2_CLEAN_MARKERS=1
 		nand_do_upgrade "$1"
 		;;

target/linux/bmips/dts/bcm63168-sagem-fast-3864-op.dts

@@ -0,0 +1,283 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "bcm63268.dtsi"
+
+/ {
+	model = "Sagemcom F@ST 3864 OP";
+	compatible = "sagem,fast-3864-op", "brcm,bcm63168", "brcm,bcm63268";
+
+	aliases {
+		led-boot = &led_power_green;
+		led-failsafe = &led_power_red;
+		led-running = &led_power_green;
+		led-upgrade = &led_power_green;
+	};
+
+	keys {
+		compatible = "gpio-keys-polled";
+		poll-interval = <100>;
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 32 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+			debounce-interval = <60>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&gpio 33 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+			debounce-interval = <60>;
+		};
+
+		wlan {
+			label = "wlan";
+			gpios = <&gpio 34 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WLAN>;
+			debounce-interval = <60>;
+		};
+	};
+};
+
+&ehci {
+	status = "okay";
+};
+
+&ethernet {
+	status = "okay";
+
+	nvmem-cells = <&macaddr_cferom_6a0>;
+	nvmem-cell-names = "mac-address";
+};
+
+&leds {
+	status = "okay";
+	brcm,serial-leds;
+	brcm,serial-dat-low;
+	brcm,serial-shift-inv;
+	brcm,serial-mux;
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_leds &pinctrl_serial_led>;
+
+	led@0 {
+		reg = <0>;
+		active-low;
+		function = LED_FUNCTION_WPS;
+		color = <LED_COLOR_ID_GREEN>;
+	};
+
+	led@1 {
+		reg = <1>;
+		active-low;
+		function = LED_FUNCTION_WPS;
+		color = <LED_COLOR_ID_RED>;
+	};
+
+	led@2 {
+		reg = <2>;
+		active-low;
+		label = "red:internet";
+	};
+
+	led@3 {
+		reg = <3>;
+		active-low;
+		label = "green:dsl";
+	};
+
+	led@4 {
+		reg = <4>;
+		active-low;
+		label = "green:fxs";
+	};
+
+	led@5 {
+		reg = <5>;
+		active-low;
+		label = "red:fxs";
+	};
+
+	led@8 {
+		reg = <8>;
+		active-low;
+		label = "green:internet";
+	};
+
+	led@9 {
+		reg = <9>;
+		active-low;
+		label = "green:dsl_bonding";
+	};
+
+	led_power_red: led@15 {
+		reg = <15>;
+		active-low;
+		function = LED_FUNCTION_POWER;
+		color = <LED_COLOR_ID_RED>;
+	};
+
+	led_power_green: led@20 {
+		reg = <20>;
+		active-low;
+		function = LED_FUNCTION_POWER;
+		color = <LED_COLOR_ID_GREEN>;
+	};
+};
+
+&mdio_ext {
+	switch@1e {
+		compatible = "brcm,bcm53125";
+		reg = <0x1e>;
+
+		dsa,member = <1 0>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@1 {
+				reg = <1>;
+				label = "lan4";
+			};
+
+			port@2 {
+				reg = <2>;
+				label = "lan3";
+			};
+
+			port@3 {
+				reg = <3>;
+				label = "lan2";
+			};
+
+			port@4 {
+				reg = <4>;
+				label = "lan1";
+			};
+
+			port@8 {
+				reg = <8>;
+
+				phy-mode = "rgmii";
+				ethernet = <&switch0port4>;
+
+				fixed-link {
+					speed = <1000>;
+					full-duplex;
+					asym-pause;
+					pause;
+				};
+			};
+		};
+	};
+};
+
+&nflash {
+	status = "okay";
+
+	nandcs@0 {
+		compatible = "brcm,nandcs";
+		reg = <0>;
+		nand-ecc-step-size = <512>;
+		nand-ecc-strength = <15>;
+		nand-on-flash-bbt;
+		brcm,nand-oob-sector-size = <64>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "cferom_nvram";
+				reg = <0x00000000 0x00020000>;
+				read-only;
+
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					macaddr_cferom_6a0: macaddr@6a0 {
+						reg = <0x6a0 0x6>;
+					};
+				};
+			};
+
+			partition@20000 {
+				compatible = "brcm,wfi-split";
+				label = "wfi";
+				reg = <0x00020000 0x7ac0000>;
+			};
+
+			partition@7ae0000 {
+				label = "stock_hidden1";
+				reg = <0x07ae0000 0x0020000>;
+				read-only;
+			};
+
+			partition@7b00000 {
+				label = "stock_data";
+				reg = <0x07b00000 0x0400000>;
+				read-only;
+			};
+
+			partition@7f00000 {
+				label = "stock_hidden2";
+				reg = <0x07f00000 0x0100000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&ohci {
+	status = "okay";
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pinctrl {
+	pinctrl_leds: leds {
+		function = "led";
+		pins = "gpio8", "gpio9", "gpio15",
+		       "gpio20";
+	};
+};
+
+&switch0 {
+	dsa,member = <0 0>;
+
+	ports {
+		port@3 {
+			reg = <3>;
+			label = "wan";
+
+			phy-handle = <&phy4>;
+		};
+
+		switch0port4: port@4 {
+			reg = <4>;
+			label = "extsw";
+
+			phy-mode = "rgmii";
+
+			fixed-link {
+				speed = <1000>;
+				full-duplex;
+			};
+		};
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&usbh {
+	status = "okay";
+};

target/linux/bmips/image/bcm63268.mk

@@ -38,6 +38,26 @@ define Device/comtrend_vr-3032u
 endef
 TARGET_DEVICES += comtrend_vr-3032u
 
+define Device/sagem_fast-3864-op
+  $(Device/bcm63xx-nand)
+  DEVICE_VENDOR := Sagemcom
+  DEVICE_MODEL := F@ST 3864
+  DEVICE_VARIANT := OP
+  CHIP_ID := 63268
+  SOC := bcm63168
+  CFE_RAM_FILE := sagem,fast-3864-op/cferam.000
+  CFE_RAM_JFFS2_NAME := cferam.000
+  BLOCKSIZE := 128k
+  PAGESIZE := 2048
+  SUBPAGESIZE := 512
+  VID_HDR_OFFSET := 2048
+  DEVICE_PACKAGES += $(USB2_PACKAGES) \
+    kmod-leds-bcm6328
+  CFE_WFI_FLASH_TYPE := 3
+  CFE_WFI_VERSION := 0x5732
+endef
+TARGET_DEVICES += sagem_fast-3864-op
+
 define Device/sercomm_h500-s-lowi
   $(Device/sercomm-nand)
   DEVICE_VENDOR := Sercomm