ramips: add support for Plasma Cloud PAX1800-Lite

Plasma Cloud PAX1800-Lite is a dual-band Wi-Fi 6 router, based on MediaTek
MT7621A + MT79x5D platform.

Specifications:

- SOC:      MT7621AT (880 MHz)
- DRAM:     DDR3 448 MiB (Nanya NT5CC256M16DP-DI)
- Flash:    2 MiB SPI NOR (S25FL016K) + 128 MB SPI NAND (W25N02KVZEIR)
- Ethernet: 1x 10/100/1000 Mbps (SOC's built-in switch, with PoE+)
- Wi-Fi:    2x2:2 2.4/5 GHz (MT7905DAN + MT7975DN)
            (MT7905DAN doesn't support background DFS scan/BT)
- LED:      tri-color LED for status (red, blue, green)
- Buttons:  1x (reset)
- Antenna:  4x internal, non-detachable omnidirectional
- UART:     1x 4-pin (2.54 mm pitch, marked as "3V3 G/RX GND W/TX")
- Power:    12 V DC/2 A (DC jack)

MAC addresses:

WAN:     54:9C:27:xx:xx:00 (factory 0x3fff4, device label)
2.4 GHz: 54:9C:27:xx:xx:02 (factory 0x4, device label +2)
5 GHz:   54:9C:27:xx:xx:08 (factory 0xa, device label +8)

Flashing instructions:
======================

Various methods can be used to install the actual image on the flash.
Two easy ones are:

ap51-flash
----------

The tool ap51-flash (https://github.com/ap51-flash/ap51-flash) should be
used to transfer the image to the u-boot when the device boots up.

initramfs from TFTP
-------------------

The serial console (115200 8N1) must be used to access the u-boot shell
during bootup. It can then be used to first boot up the initramfs image
from a TFTP server (here with the IP 192.168.1.21):

    setenv serverip 192.168.1.21
    setenv ipaddr 192.168.1.1
    tftpboot 0x83001000 <filename-of-initramfs-kernel>.bin && bootm $fileaddr

The actual sysupgrade image can then be transferred (on the LAN port) to the
device via

    scp <filename-of-squashfs-sysupgrade>.bin root@192.168.1.1:/tmp/

On the device, the sysupgrade must then be started using

    sysupgrade -n /tmp/<filename-of-squashfs-sysupgrade>.bin

Signed-off-by: Sven Eckelmann (Plasma Cloud) <se@simonwunderlich.de>
Link: https://github.com/openwrt/openwrt/pull/20152
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

include/image-commands.mk

@@ -640,6 +640,19 @@ define Build/openmesh-image
 		"$(call param_get_default,rootfs,$(1),$@)" "rootfs"
 endef
 
+define Build/dualboot-datachk-nand-image
+	$(TOPDIR)/scripts/nand-fwupgradecfg-gen.sh \
+		"$(call param_get_default,ce_type,$(1),$(DEVICE_NAME))" \
+		"$@-fwupgrade.cfg" \
+		"$(call param_get_default,kernel,$(1),$(IMAGE_KERNEL))" \
+		"$(call param_get_default,rootfs,$(1),$@)"
+	$(TOPDIR)/scripts/combined-ext-image.sh \
+		"$(call param_get_default,ce_type,$(1),$(DEVICE_NAME))" "$@" \
+		"$@-fwupgrade.cfg" "fwupgrade.cfg" \
+		"$(call param_get_default,kernel,$(1),$(IMAGE_KERNEL))" "kernel" \
+		"$(call param_get_default,rootfs,$(1),$@)" "rootfs"
+endef
+
 define Build/pad-extra
 	dd if=/dev/zero bs=$(1) count=1 >> $@
 endef

package/boot/uboot-tools/uboot-envtools/files/ramips

@@ -32,6 +32,7 @@ allnet,all0256n-4m|\
 allnet,all0256n-8m|\
 allnet,all5002|\
 asiarf,ap7621-004-v3|\
+plasmacloud,pax1800-lite|\
 yuncore,ax820)
 	ubootenv_add_uci_config "/dev/mtd1" "0x0" "0x10000" "0x10000"
 	;;

scripts/nand-fwupgradecfg-gen.sh

@@ -0,0 +1,61 @@
+#!/bin/sh
+#
+# Copyright (C) 2011 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+usage() {
+	echo "Usage: $0 <TARGET> <out file path> <kernel path> <rootfs path>"
+	exit 1
+}
+
+[ "$#" -lt 4 ] && usage
+
+CE_TYPE=$1
+CFG_OUT=$2
+KERNEL_PATH=$3
+ROOTFS_PATH=$4
+
+case $CE_TYPE in
+PAX1800-Lite)
+	EXTRA_SETENV=""
+	;;
+*)
+	echo "Error - unsupported ce type: $CE_TYPE"
+	exit 1
+	;;
+esac
+
+# kernel calculation
+KERNEL_MD5=$(mkhash md5 $KERNEL_PATH)
+KERNEL_SHA256=$(mkhash sha256 $KERNEL_PATH)
+KERNEL_SIZE=$(stat -c%s "$KERNEL_PATH")
+KERNEL_CHECK_SIZE=$(printf '0x%x' $KERNEL_SIZE)
+
+# rootfs calculation
+ROOTFS_MD5=$(mkhash md5 $ROOTFS_PATH)
+ROOTFS_SHA256=$(mkhash sha256 $ROOTFS_PATH)
+ROOTFS_SIZE=$(stat -c%s "$ROOTFS_PATH")
+ROOTFS_CHECK_SIZE=$(printf '0x%x' $ROOTFS_SIZE)
+
+cat << EOF > $CFG_OUT
+[kernel]
+filename=kernel
+md5sum=$KERNEL_MD5
+filemd5sum=$KERNEL_MD5
+filesha256sum=$KERNEL_SHA256
+checksize=$KERNEL_CHECK_SIZE
+ubi=1
+cmd_success=setenv bootseq 1,2; $EXTRA_SETENV; saveenv
+
+[rootfs]
+filename=rootfs
+md5sum=$ROOTFS_MD5
+filemd5sum=$ROOTFS_MD5
+filesha256sum=$ROOTFS_SHA256
+checksize=$ROOTFS_CHECK_SIZE
+ubi=1
+cmd_success=setenv bootseq 1,2; $EXTRA_SETENV; saveenv
+EOF

target/linux/ramips/image/mt7621.mk

@@ -2528,6 +2528,21 @@ define Device/planex_vr500
 endef
 TARGET_DEVICES += planex_vr500
 
+define Device/plasmacloud_pax1800-lite
+  $(Device/nand)
+  IMAGE_SIZE := 60512k
+  DEVICE_VENDOR := Plasma Cloud
+  DEVICE_MODEL := PAX1800-Lite
+  DEVICE_DTS_CONFIG := config@plasmacloud.pax1800-lite
+  DEVICE_PACKAGES := kmod-mt7915-firmware kmod-usb3 kmod-hwmon-lm75
+  KERNEL_IN_UBI := 1
+  IMAGES += factory.bin
+  KERNEL := kernel-bin | lzma | fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb | pad-to $$(BLOCKSIZE)
+  IMAGE/factory.bin := append-rootfs | pad-to 1k | dualboot-datachk-nand-image ce_type=PAX1800-Lite
+  IMAGE/sysupgrade.bin := append-rootfs | pad-to 1k | sysupgrade-tar rootfs=$$$$@ | append-metadata
+endef
+TARGET_DEVICES += plasmacloud_pax1800-lite
+
 define Device/raisecom_msg1500-x-00
   $(Device/nand)
   $(Device/uimage-lzma-loader)

target/linux/ramips/mt7621/base-files/etc/board.d/02_network

@@ -51,6 +51,7 @@ ramips_setup_interfaces()
 	netgear,eax12|\
 	netgear,ex6150|\
 	netgear,wax214v2|\
+	plasmacloud,pax1800-lite|\
 	sercomm,na502|\
 	sercomm,na502s|\
 	thunder,timecloud|\

target/linux/ramips/mt7621/base-files/lib/upgrade/dualboot_datachk.sh

@@ -0,0 +1,67 @@
+# The U-Boot loader with the datachk patchset for dualbooting requires image
+# sizes and checksums to be provided in the U-Boot environment.
+# The devices come with 2 main partitions - while one is active
+# sysupgrade will flash the other. The boot order is changed to boot the
+# newly flashed partition. If the new partition can't be booted due to
+# upgrade failures the previously used partition is loaded.
+
+platform_do_upgrade_dualboot_datachk() {
+	local next_boot_part=1
+	local tar_file="$1"
+	local bootseq
+
+	local setenv_script="/tmp/fw_env_upgrade"
+
+	if [ "$(grep 'ubi.mtd=firmware1' /proc/cmdline)" ];  then
+		next_boot_part=2
+		bootseq="2,1"
+	else
+		next_boot_part=1
+		bootseq="1,2"
+	fi
+
+	local board_dir="$(tar tf "${tar_file}" | grep -m 1 '^sysupgrade-.*/$')"
+	board_dir="${board_dir%/}"
+
+	local kernel_length="$(tar xf "${tar_file}" "${board_dir}/kernel" -O | wc -c)"
+	local rootfs_length="$(tar xf "${tar_file}" "${board_dir}/root" -O | wc -c)"
+
+	local kernel_md5="$(tar xf "${tar_file}" "${board_dir}/kernel" -O | md5sum)"
+	kernel_md5="${kernel_md5%% *}"
+
+	local rootfs_md5="$(tar xf "${tar_file}" "${board_dir}/root" -O | md5sum)"
+	rootfs_md5="${rootfs_md5%% *}"
+
+	CI_UBIPART="firmware${next_boot_part}"
+	CI_KERNPART="kernel"
+	CI_ROOTPART="rootfs"
+
+	nand_upgrade_prepare_ubi "${rootfs_length}" "squashfs" "$kernel_length" "0"
+
+	local ubidev="$(nand_find_ubi "${CI_UBIPART}")"
+
+	local kern_ubivol="$(nand_find_volume "${ubidev}" "${CI_KERNPART}")"
+	tar xf "${tar_file}" "${board_dir}/kernel" -O | \
+		ubiupdatevol "/dev/${kern_ubivol}" -s "${kernel_length}" -
+
+	local root_ubivol="$(nand_find_volume "${ubidev}" "${CI_ROOTPART}")"
+	tar xf "${tar_file}" "${board_dir}/root" -O | \
+		ubiupdatevol "/dev/${root_ubivol}" -s "${rootfs_length}" -
+
+	[ -f "${UPGRADE_BACKUP}" ] && nand_restore_config "${UPGRADE_BACKUP}"
+
+	# write new new uboot-env
+	printf "bootseq ${bootseq}\n" > "${setenv_script}"
+
+	printf "kernel_%i_size 0x%08x\n" "${next_boot_part}" "${kernel_length}" >> "${setenv_script}"
+	printf "kernel_%i_checksum %s\n" "${next_boot_part}" "${kernel_md5}" >> "${setenv_script}"
+
+	printf "rootfs_%i_size 0x%08x\n" "${next_boot_part}" "${rootfs_length}" >> "${setenv_script}"
+	printf "rootfs_%i_checksum %s\n" "${next_boot_part}" "${rootfs_md5}" >> "${setenv_script}"
+
+	mkdir -p /var/lock
+	fw_setenv -s "${setenv_script}" || {
+		echo "failed to update U-Boot environment"
+		return 1
+	}
+}

target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh

@@ -185,6 +185,9 @@ platform_do_upgrade() {
 		iodata_mstc_set_flag "bootnum" "persist" "0x4" "1,2" "1"
 		nand_do_upgrade "$1"
 		;;
+	plasmacloud,pax1800-lite)
+		platform_do_upgrade_dualboot_datachk "$1"
+		;;
 	tplink,er605-v2)
 		echo "Upgrading tplink,er605-v2"
 		CI_UBIPART="firmware"

target/linux/ramips/mt7621/config-6.12

@@ -164,6 +164,7 @@ CONFIG_MTD_PHYSMAP=y
 CONFIG_MTD_RAW_NAND=y
 CONFIG_MTD_ROUTERBOOT_PARTS=y
 CONFIG_MTD_SERCOMM_PARTS=y
+CONFIG_MTD_SPI_NAND=y
 CONFIG_MTD_SPI_NOR=y
 CONFIG_MTD_SPI_NOR_USE_VARIABLE_ERASE=y
 CONFIG_MTD_SPLIT_FIT_FW=y