mediatek: rework support for BananaPi BPi-R64

**What's new**

 * Bring support for the Bananapi BPi-R64 to the level desirable for
   a nice hackable routerboard.
 * Use ARM Trusted Firmware A from source. (goodbye binary preloader)
 * Use Das U-Boot from source. (see previous commit)
 * Assemble SD-card image using OpenWrt image-commands.
   (no gen_sd_cruz_foo.sh added, this is not Raspbian)
 * Updated kernel options to support root filesystem.
 * Updated DTS to match OpenWrt LAN ports, known LEDs, buttons, ...
 * Detect root device, handle sysupgrade, config restore, ...
 * Wire up (known) LEDs and buttons in OpenWrt-fashion.
 * Build one set of images from SD-card and eMMC.
 * Hopefully provide a good example of how things can be done right
   from scratch.

**Installation and images**

 * Have an empty SD-card at hand
 * Write stuff to the card, as root (card device is /dev/mmcblkX)
   - write header, gpt, bl2, atf, u-boot and recovery kernel:
     `cat *bpi-r64-boot-sdcard.img *bpi-r64-initramfs-recovery.fit > /dev/mmcblkX`
   - rescan partitions:
     `blockdev --rereadpt /dev/mmcblkX`
   - write main system to production partition:
     `cat *bpi-r64-squashfs-sysupgrade.fit > /dev/mmcblkXp5`

 * Installation to eMMC works using SD-card bootloader via TFTP
   When running OpenWrt of SD-card, issue this to trigger installation
   to eMMC:
   `fw_setenv bootcmd run emmc_init`
   Be prepared to serve the content of bin/targets/mediatek/mt7622 on
   TFTP server address 192.168.1.254.

**What's missing**

 * The red LED is always on, probably a hardware bug.
 * AHCI (probably needs DTS changes)
 * Ship SD-card image ready with every needed for eMMC install.
 * The eMMC has a second, currently unused boot partition. This would
   be ideal to store the WiFi EEPROM and Ethernet MAC address(es).
   @sinovoip ideas?

Thanks to Thomas Hühn @thuehn for providing the hardware!

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

target/linux/mediatek/dts/mt7622-bananapi-bpi-r64-rootdisk.dts

@@ -1,18 +0,0 @@
-// SPDX-License-Identifier: (GPL-2.0-only OR MIT)
-/*
- * Copyright (c) 2018 MediaTek Inc.
- * Author: Ryder Lee <ryder.lee@mediatek.com>
- */
-
-/dts-v1/;
-
-#include "mt7622-bananapi-bpi-r64.dts"
-/ {
-	model = "Bananapi BPI-R64";
-	compatible = "bananapi,bpi-r64-rootdisk", "mediatek,mt7622";
-
-	chosen {
-		stdout-path = "serial0:115200n8";
-		bootargs = "earlycon=uart8250,mmio32,0x11002000 console=ttyS0,115200n1 swiotlb=512 root=/dev/mmcblk0p7 rootfstype=squashfs,f2fs";
-	};
-};

target/linux/mediatek/image/gen_mt7622_emmc_img.sh

@@ -1,19 +0,0 @@
-#!/bin/sh
-
-OUTPUT_FILE=$1
-KERNEL_FILE=$2
-RECOVERY_FILE=$3
-ROOTFS_FILE=$4
-
-BS=512
-
-#RECOVERY_OFFSET= kernel size / BS = 20M / 512 (blocks)
-RECOVERY_OFFSET=40960
-
-#ROOTFS_OFFSET = RECOVERY_OFFSET + (RECOVERY_SIZE / BS)
-#	       = 40960 + (10M  / 512) (blocks)
-ROOTFS_OFFSET=61440
-dd bs="$BS" of="$OUTPUT_FILE" if="$KERNEL_FILE"
-dd bs="$BS" of="$OUTPUT_FILE" if="$RECOVERY_FILE" seek="$RECOVERY_OFFSET"
-dd bs="$BS" of="$OUTPUT_FILE" if="$ROOTFS_FILE" seek="$ROOTFS_OFFSET"
-dd if=/dev/zero of="$OUTPUT_FILE" bs=128k count=1 oflag=append conv=notrunc

target/linux/mediatek/image/mt7622.mk

@@ -6,35 +6,58 @@ else
   KERNEL_LOADADDR := 0x44000000
 endif
 
+define Build/mmc-header
+	dd if=$(STAGING_DIR_IMAGE)/mt7622-header_$1.bin bs=512 count=1 of=$@ conv=notrunc
+endef
+
 define Build/bl2
-	$(CP) $(STAGING_DIR_IMAGE)/mt7622-$1-bl2.img $@
+	cat $(STAGING_DIR_IMAGE)/mt7622-$1-bl2.img >> $@
 endef
 
 define Build/bl31-uboot
-	$(CP) $(STAGING_DIR_IMAGE)/mt7622_$1-u-boot.fip $@
+	cat $(STAGING_DIR_IMAGE)/mt7622_$1-u-boot.fip >> $@
 endef
 
-define Device/bpi_bananapi-r64
-  DEVICE_VENDOR := Bpi
-  DEVICE_MODEL := Banana Pi R64
+define Build/mt7622-gpt
+	ptgen -g -o $@ -h 4 -s 31 -a 1 -l 1024 -g \
+		-t 0xef \
+		$(if $(findstring sdmmc,$1), \
+			-N bl2		-r	-p 512k@512k \
+		) \
+			-N fip		-r	-p 1M@2M \
+			-N ubootenv	-r	-p 1M@4M \
+			-N recovery	-r	-p 32M@6M \
+		$(if $(findstring sdmmc,$1), \
+			-t 0x2e -N production	-p 216M@40M \
+		) \
+		$(if $(findstring emmc,$1), \
+			-t 0x2e -N production	-p 980M@40M \
+		)
+endef
+
+define Device/bananapi_bpi-r64
+  DEVICE_VENDOR := Bananapi
+  DEVICE_MODEL := BPi-R64
   DEVICE_DTS := mt7622-bananapi-bpi-r64
-  SUPPORTED_DEVICES := bananapi,bpi-r64
-  DEVICE_PACKAGES := kmod-usb-ohci kmod-usb2 kmod-usb3 kmod-ata-ahci-mtk
+  DEVICE_PACKAGES := kmod-usb-ohci kmod-usb2 kmod-usb3 kmod-ata-ahci-mtk \
+		     kmod-mt7615e kmod-mt7615-firmware \
+		     uboot-mt7622_bananapi_bpi-r64-emmc \
+		     uboot-mt7622_bananapi_bpi-r64-sdmmc \
+		     e2fsprogs mkf2fs f2fsck \
+		     kmod-nls-cp437 kmod-nls-iso8859-1 kmod-vfat blockd
+  ARTIFACTS := boot-sdcard.img boot-emmc.img bl2-emmc.bin bl31-emmc.bin header-emmc.bin
+  IMAGES := sysupgrade.itb
+  KERNEL_INITRAMFS_SUFFIX := -recovery.itb
+  ARTIFACT/boot-sdcard.img	:= mt7622-gpt sdmmc | mmc-header sdmmc | pad-to 512k | bl2 sdmmc-2ddr | pad-to 2M | bl31-uboot bananapi_bpi-r64-sdmmc | pad-to 6M
+  ARTIFACT/boot-emmc.img	:= mt7622-gpt  emmc | mmc-header  emmc |                                pad-to 2M | bl31-uboot bananapi_bpi-r64-emmc  | pad-to 6M
+  ARTIFACT/header-emmc.bin	:= mt7622-gpt  emmc | mmc-header  emmc
+  ARTIFACT/bl31-emmc.bin	:= bl31-uboot bananapi_bpi-r64-emmc
+  ARTIFACT/bl2-emmc.bin		:= bl2 emmc-2ddr
+  KERNEL			:= kernel-bin | gzip
+  KERNEL_INITRAMFS		:= kernel-bin | lzma | fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb with-initrd | pad-to 128k
+  IMAGE/sysupgrade.itb		:= append-kernel | fit gzip $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb external-static-with-rootfs | append-metadata
 endef
-TARGET_DEVICES += bpi_bananapi-r64
-
-define Device/bpi_bananapi-r64-rootdisk
-  DEVICE_VENDOR := Bpi
-  DEVICE_MODEL := Banana Pi R64 (rootdisk)
-  DEVICE_DTS := mt7622-bananapi-bpi-r64-rootdisk
-  DEVICE_DTS_DIR := ../dts
-  SUPPORTED_DEVICES := bananapi,bpi-r64
-  DEVICE_PACKAGES := kmod-fs-vfat kmod-nls-cp437 kmod-nls-iso8859-1 \
-	mkf2fs e2fsprogs kmod-usb-ohci kmod-usb2 kmod-usb3 kmod-ata-ahci-mtk
-  IMAGES := sysupgrade-emmc.bin.gz
-  IMAGE/sysupgrade-emmc.bin.gz := sysupgrade-emmc | gzip | append-metadata
-endef
-TARGET_DEVICES += bpi_bananapi-r64-rootdisk
+TARGET_DEVICES += bananapi_bpi-r64
 
 define Device/elecom_wrc-2533gent
   DEVICE_VENDOR := Elecom

target/linux/mediatek/mt7622/base-files/etc/board.d/02_network

@@ -9,7 +9,6 @@ mediatek_setup_interfaces()
 	local board="$1"
 
 	case $board in
-	bananapi,bpi-r64-rootdisk|\
 	bananapi,bpi-r64|\
 	linksys,e8450|\
 	linksys,e8450-ubi|\

target/linux/mediatek/mt7622/base-files/lib/upgrade/platform.sh

@@ -1,15 +1,52 @@
-RAMFS_COPY_BIN='fw_printenv fw_setenv'
+RAMFS_COPY_BIN='fw_printenv fw_setenv blockdev'
 RAMFS_COPY_DATA='/etc/fw_env.config /var/lock/fw_printenv.lock'
 
+get_cmdline_var() {
+	local var=$1
+	local cmdlinevar tmp
+	local cmdline="$(cat /proc/cmdline)"
+
+	for cmdlinevar in $cmdline; do
+		tmp=${cmdlinevar##${var}}
+		[ "=" = "${tmp:0:1}" ] && echo ${tmp:1}
+	done
+}
+
+get_rootdev() {
+	local rootvol rootdev
+	rootvol=$(get_cmdline_var root)
+	rootvol=$(basename $rootvol)
+	[ -e /sys/class/block/$rootvol/partition ] || {
+		echo $rootvol
+		return
+	}
+	rootdev=$(busybox readlink -f /sys/class/block/$rootvol)
+	rootdev=$(basename ${rootdev%%/${rootvol}})
+	[ -e /sys/class/block/$rootdev ] && echo $rootdev
+}
+
+get_partition() {
+	for partname in /sys/class/block/$1/*/name; do
+		[ "$(cat ${partname})" = "$2" ] && {
+			basename ${partname%%/name}
+			break
+		}
+	done
+}
+
 platform_do_upgrade() {
 	local board=$(board_name)
 	local file_type=$(identify $1)
 
 	case "$board" in
-	bananapi,bpi-r64-rootdisk)
-		#2097152=0x200000 is the offset in bytes from the start
-		#of eMMC and to the location of the kernel
-		get_image "$1" | dd of=/dev/mmcblk0 bs=2097152 seek=1 conv=fsync
+	bananapi,bpi-r64)
+		local rootdev=$(get_rootdev)
+		local fitpart=$(get_partition $rootdev production)
+		[ "$fitpart" ] || exit 1
+		dd if=/dev/zero of=/dev/$fitpart bs=4096 count=1 2>/dev/null
+		blockdev --rereadpt /dev/$rootdev
+		get_image "$1" | dd of=/dev/$fitpart
+		echo $rootdev > /tmp/sysupgrade.rootdev
 		;;
 	linksys,e8450-ubi|\
 	mediatek,mt7622,ubi)
@@ -51,18 +88,20 @@ platform_check_image() {
 	return 0
 }
 
-platform_copy_config_emmc() {
-	mkdir -p /recovery
-	mount -o rw,noatime /dev/mmcblk0p6 /recovery
-	cp -af "$UPGRADE_BACKUP" "/recovery/$BACKUP_FILE"
+platform_copy_config_mmc() {
+	local rootdev=$(cat /tmp/sysupgrade.rootdev)
+	blockdev --rereadpt /dev/$rootdev
+	local datadev=$(get_partition $rootdev rootfs_data)
+	[ "$datadev" ] || echo "no rootfs_data partition, cannot keep configuration." >&2
+	dd if="$UPGRADE_BACKUP" of=/dev/$datadev
 	sync
-	umount /recovery
+	sleep 4
 }
 
 platform_copy_config() {
 	case "$(board_name)" in
-	bananapi,bpi-r64-rootdisk)
-		platform_copy_config_emmc
+	bananapi,bpi-r64)
+		platform_copy_config_mmc
 		;;
 	esac
 }

target/linux/mediatek/mt7622/config-5.10

@@ -155,6 +155,7 @@ CONFIG_DTC=y
 CONFIG_DYNAMIC_DEBUG=y
 CONFIG_EDAC_SUPPORT=y
 CONFIG_EINT_MTK=y
+CONFIG_EXT4_FS=y
 CONFIG_FIT_PARTITION=y
 CONFIG_FIXED_PHY=y
 CONFIG_FIX_EARLYCON_MEM=y

target/linux/mediatek/mt7622/target.mk

@@ -2,7 +2,7 @@ ARCH:=aarch64
 SUBTARGET:=mt7622
 BOARDNAME:=MT7622
 CPU_TYPE:=cortex-a53
-DEFAULT_PACKAGES += kmod-mt7615e kmod-mt7615-firmware wpad-basic-wolfssl
+DEFAULT_PACKAGES += kmod-mt7615e kmod-mt7615-firmware wpad-basic-wolfssl blockdev uboot-envtools
 KERNELNAME:=Image dtbs
 KERNEL_PATCHVER:=5.10
 

target/linux/mediatek/patches-5.10/112-dts-fix-bpi64-lan-names.patch

@@ -0,0 +1,29 @@
+--- a/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
++++ b/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
+@@ -160,22 +160,22 @@
+ 
+ 				port@1 {
+ 					reg = <1>;
+-					label = "lan0";
++					label = "lan1";
+ 				};
+ 
+ 				port@2 {
+ 					reg = <2>;
+-					label = "lan1";
++					label = "lan2";
+ 				};
+ 
+ 				port@3 {
+ 					reg = <3>;
+-					label = "lan2";
++					label = "lan3";
+ 				};
+ 
+ 				port@4 {
+ 					reg = <4>;
+-					label = "lan3";
++					label = "lan4";
+ 				};
+ 
+ 				port@6 {

target/linux/mediatek/patches-5.10/112-dts-fix-bpi64-leds-and-buttons.patch

@@ -0,0 +1,56 @@
+--- a/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
++++ b/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
+@@ -18,6 +18,10 @@
+ 
+ 	aliases {
+ 		serial0 = &uart0;
++		led-boot = &led_system_green;
++		led-failsafe = &led_system_blue;
++		led-running = &led_system_green;
++		led-upgrade = &led_system_blue;
+ 	};
+ 
+ 	chosen {
+@@ -41,8 +45,8 @@
+ 		compatible = "gpio-keys";
+ 
+ 		factory {
+-			label = "factory";
+-			linux,code = <BTN_0>;
++			label = "reset";
++			linux,code = <KEY_RESTART>;
+ 			gpios = <&pio 0 GPIO_ACTIVE_HIGH>;
+ 		};
+ 
+@@ -56,17 +60,25 @@
+ 	leds {
+ 		compatible = "gpio-leds";
+ 
+-		green {
+-			label = "bpi-r64:pio:green";
+-			gpios = <&pio 89 GPIO_ACTIVE_HIGH>;
++		led_system_blue: blue {
++			label = "bpi-r64:pio:blue";
++			gpios = <&pio 85 GPIO_ACTIVE_LOW>;
+ 			default-state = "off";
+ 		};
+ 
+-		red {
+-			label = "bpi-r64:pio:red";
+-			gpios = <&pio 88 GPIO_ACTIVE_HIGH>;
++		led_system_green: green {
++			label = "bpi-r64:pio:green";
++			gpios = <&pio 89 GPIO_ACTIVE_HIGH>;
+ 			default-state = "off";
+ 		};
++
++/*
++ *		red {
++ *			label = "bpi-r64:pio:red";
++ *			gpios = <&pio 88 GPIO_ACTIVE_HIGH>;
++ *			default-state = "off";
++ *		};
++ */
+ 	};
+ 
+ 	memory {

target/linux/mediatek/patches-5.10/602-arm64-dts-mediatek-Split-PCIe-node-for-MT2712-MT7622.patch

@@ -253,7 +253,7 @@ Signed-off-by: chuanjia.liu <Chuanjia.Liu@mediatek.com>
  				#interrupt-cells = <1>;
 --- a/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
 +++ b/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
-@@ -257,18 +257,16 @@
+@@ -269,18 +269,16 @@
  	};
  };