ramips: add support for Beeline SmartBox GIGA

Beeline SmartBox GIGA is a wireless WiFi 5 router manufactured by
Sercomm company.

Device specification
--------------------
SoC Type: MediaTek MT7621AT
RAM: 256 MiB, Nanya NT5CC128M16JR-EK
Flash: 128 MiB, Macronix MX30LF1G18AC
Wireless 2.4 GHz (MT7603EN): b/g/n, 2x2
Wireless 5 GHz (MT7613BE): a/n/ac, 2x2
Ethernet: 3 ports - 2xGbE (WAN, LAN1), 1xFE (LAN2)
USB ports: 1xUSB3.0
Button: 1 button (Reset/WPS)
PCB ID: DBE00B-1.6MM
LEDs: 1 RGB LED
Power: 12 VDC, 1.5 A
Connector type: barrel
Bootloader: U-Boot

Installation
-----------------
1. Downgrade stock (Beeline) firmware to v.1.0.02;
2. Give factory OpenWrt image a shorter name, e.g. 1001.img;
3. Upload and update the firmware via the original web interface.

Remark: You might need make the 3rd step twice if your running firmware
is booted from the Slot 1 (Sercomm0 bootflag). The stock firmware
reverses the bootflag (Sercomm0 / Sercomm1) on each firmware update.

Revert to stock
---------------
1. Change the bootflag to Sercomm1 in OpenWrt CLI and then reboot:
      printf 1 | dd bs=1 seek=7 count=1 of=/dev/mtdblock3
2. Optional: Update with any stock (Beeline) firmware if you want to
   overwrite OpenWrt in Slot 0 completely.

MAC Addresses
-------------
+-----+-----------+---------+
| use | address   | example |
+-----+-----------+---------+
| LAN | label     | *:16    |
| WAN | label + 1 | *:17    |
| 2g  | label + 4 | *:1a    |
| 5g  | label + 5 | *:1b    |
+-----+-----------+---------+
The label MAC address was found in Factory 0x21000

Notes
-----
1. The following scripts are required for the build:
      sercomm-crypto.py - already exists in OpenWrt
      sercomm-partition-tag.py - already exists in OpenWrt
      sercomm-payload.py - already exists in OpenWrt
      sercomm-pid.py - new, the part of this pull request
      sercomm-kernel-header.py - new, the part of this pull request
2. This device (same as other Sercomm S2,S3-based devices) requires
   special LZMA and LOADADDR settings for successful boot:
      LZMA_TEXT_START=0x82800000
      KERNEL_LOADADDR=0x81001000
      LOADADDR=0x80001000
3. This device (same as several other Sercomm-based devices - Beeline,
   Netgear, Etisalat, Rostelecom) has partition map (mtd1) containing
   real partition offsets, which may differ from device to device
   depending on the number and location of bad blocks on NAND.
   "fixed-partitions" is used if the partition map is not found or
   corrupted. This behavour (it's the same as on stock firmware) is
   provided by MTD_SERCOMM_PARTS module.

Signed-off-by: Mikhail Zhilkin <csharper2005@gmail.com>

1 files changed, 237 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/mt7621_beeline_smartbox-giga.dts b/target/linux/ramips/dts/mt7621_beeline_smartbox-giga.dts
new file mode 100644
index 0000000000..efea79e2e2
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_beeline_smartbox-giga.dts
@@ -0,0 +1,237 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+	compatible = "beeline,smartbox-giga", "mediatek,mt7621-soc";
+	model = "Beeline SmartBox GIGA";
+
+	aliases {
+		label-mac-device = &gmac0;
+
+		led-boot = &led_status_green;
+		led-failsafe = &led_status_red;
+		led-running = &led_status_green;
+		led-upgrade = &led_status_red;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_status_green: led-0 {
+			label = "green:status";
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_STATUS;
+			gpios = <&gpio 13 GPIO_ACTIVE_HIGH>;
+		};
+
+		led-1 {
+			label = "blue:wan";
+			color = <LED_COLOR_ID_BLUE>;
+			function = LED_FUNCTION_WAN;
+			gpios = <&gpio 14 GPIO_ACTIVE_HIGH>;
+		};
+
+		led_status_red: led-2 {
+			label = "red:status";
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_STATUS;
+			gpios = <&gpio 15 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	ubi-concat {
+		compatible = "mtd-concat";
+		devices = <&ubiconcat0 &ubiconcat1 &ubiconcat2 \
+			&ubiconcat3>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "ubi";
+				reg = <0x0 0x5400000>;
+			};
+		};
+	};
+};
+
+&nand {
+	status = "okay";
+
+	partitions {
+		compatible = "sercomm,sc-partitions", "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		partition@0 {
+			label = "u-boot";
+			reg = <0x0 0x100000>;
+			sercomm,scpart-id = <0>;
+			read-only;
+		};
+
+		partition@100000 {
+			label = "dynamic partition map";
+			reg = <0x100000 0x100000>;
+			sercomm,scpart-id = <1>;
+		};
+
+		factory: partition@200000 {
+			label = "Factory";
+			reg = <0x200000 0x100000>;
+			sercomm,scpart-id = <2>;
+			read-only;
+
+			compatible = "nvmem-cells";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			macaddr_factory_21000: macaddr@21000 {
+				reg = <0x21000 0x6>;
+			};
+		};
+
+		partition@300000 {
+			label = "Boot Flag";
+			reg = <0x300000 0x100000>;
+			sercomm,scpart-id = <3>;
+		};
+
+		partition@400000 {
+			label = "kernel";
+			reg = <0x400000 0x600000>;
+			sercomm,scpart-id = <4>;
+		};
+
+		partition@a00000 {
+			label = "Kernel 2";
+			reg = <0xa00000 0x600000>;
+			sercomm,scpart-id = <5>;
+			read-only;
+		};
+
+		ubiconcat0: partition@1000000 {
+			label = "File System 1";
+			reg = <0x1000000 0x1800000>;
+			sercomm,scpart-id = <6>;
+		};
+
+		partition@2800000 {
+			label = "File System 2";
+			reg = <0x2800000 0x1800000>;
+			sercomm,scpart-id = <7>;
+			read-only;
+		};
+
+		ubiconcat1: partition@4000000 {
+			label = "Configuration/log";
+			reg = <0x4000000 0x800000>;
+			sercomm,scpart-id = <8>;
+		};
+
+		ubiconcat2: partition@4800000 {
+			label = "application tmp buffer (Ftool)";
+			reg = <0x4800000 0xc00000>;
+			sercomm,scpart-id = <9>;
+		};
+
+		ubiconcat3: partition@5400000 {
+			label = "container";
+			reg = <0x5400000 0x2800000>;
+			sercomm,scpart-id = <10>;
+		};
+
+		partition@7c00000 {
+			label = "bad block reserved";
+			reg = <0x7c00000 0x380000>;
+			sercomm,scpart-id = <11>;
+			read-only;
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x8000>;
+		ieee80211-freq-limit = <5000000 6000000>;
+
+		nvmem-cells = <&macaddr_factory_21000>;
+		nvmem-cell-names = "mac-address";
+		mac-address-increment = <(5)>;
+	};
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x0>;
+		ieee80211-freq-limit = <2400000 2500000>;
+
+		nvmem-cells = <&macaddr_factory_21000>;
+		nvmem-cell-names = "mac-address";
+		mac-address-increment = <(4)>;
+	};
+};
+
+&gmac0 {
+	nvmem-cells = <&macaddr_factory_21000>;
+	nvmem-cell-names = "mac-address";
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "wan";
+
+			nvmem-cells = <&macaddr_factory_21000>;
+			nvmem-cell-names = "mac-address";
+			mac-address-increment = <(1)>;
+		};
+
+		port@1 {
+			status = "okay";
+			label = "lan1";
+		};
+
+		port@2 {
+			status = "okay";
+			label = "lan2";
+		};
+	};
+};
+
+&uartlite3 {
+	status = "okay";
+};
+
+&state_default {
+	gpio {
+		groups = "i2c", "jtag";
+		function = "gpio";
+	};
+};