mediatek: add support for BananaPi BPI-R4 board

Hardware
--------
SOC:    MediaTek MT7988A (4x Cortex-A73)
RAM:    4 GiB DDR4
Flash:  128 MiB Winbond SPI-NAND
MMC:    8 GiB eMMC *or* microSD (cannot be used both)
ETH:    4x 1GE (1x WAN, 3x LAN)
        2x SFP+ (10G, 5G, 2.5G, 1G)
USB:    on-board USB 3.2 4-port hub
        1x USB 3.2 port (type A connector)
        1x M.2 for 4G/5G modem
        2x mPCIe for additional modems
WiFi:   optional MediaTek MT7996 Wi-Fi 7 module
        (using 2x PCIe gen3 x2 on the mPCIe slots and 12V power)

Installation
------------
1. Decompress and write the sdcard image to a micro SD card and use that
to boot the R4 (both dip switches in upper position).

2. Use the bootloader menu accessible via the serial console to install
to SPI-NAND.

3. Switch to boot from SPI-NAND and install to eMMC.

Known issues
------------
 - The RST button is hard-wired to the SoC reset and can't be read
   from software. This can be changed by modifying the board (ie.
   moving a 0-ohm resistor). However, in order to maintain compatibility
   with the board as it comes from factory the button isn't used by
   OpenWrt and the WPS button is used as factory/reset button instead.

 - various small things still need to be fixed in DT

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

1 files changed, 45 insertions, 0 deletions

diff --git a/target/linux/mediatek/image/filogic.mk b/target/linux/mediatek/image/filogic.mk
index 90a0e91f02..0d36199f0d 100644
--- a/target/linux/mediatek/image/filogic.mk
+++ b/target/linux/mediatek/image/filogic.mk
@@ -272,6 +272,51 @@ endif
 endef
 TARGET_DEVICES += bananapi_bpi-r3
 
+define Device/bananapi_bpi-r4
+  DEVICE_VENDOR := Bananapi
+  DEVICE_MODEL := BPi-R4
+  DEVICE_DTS := mt7988a-bananapi-bpi-r4
+  DEVICE_DTS_CONFIG := config-mt7988a-bananapi-bpi-r4
+  DEVICE_DTS_DIR := $(DTS_DIR)/
+  DEVICE_DTS_LOADADDR := 0x45f00000
+  DEVICE_DTS_OVERLAY:= mt7988a-bananapi-bpi-r4-emmc mt7988a-bananapi-bpi-r4-rtc mt7988a-bananapi-bpi-r4-sd mt7988a-bananapi-bpi-r4-wifi-mt7996a
+  DEVICE_DTC_FLAGS := --pad 4096
+  DEVICE_PACKAGES := fitblk kmod-hwmon-pwmfan kmod-i2c-mux-pca954x kmod-eeprom-at24 kmod-mt7996-firmware \
+		     kmod-rtc-pcf8563 kmod-sfp kmod-usb3 e2fsprogs f2fsck mkf2fs
+  IMAGES := sysupgrade.itb
+  KERNEL_LOADADDR := 0x46000000
+  KERNEL_INITRAMFS_SUFFIX := -recovery.itb
+  ARTIFACTS := \
+	       emmc-preloader.bin emmc-bl31-uboot.fip \
+	       sdcard.img.gz \
+	       snand-preloader.bin snand-bl31-uboot.fip
+  ARTIFACT/emmc-preloader.bin	:= mt7988-bl2 emmc-comb
+  ARTIFACT/emmc-bl31-uboot.fip	:= mt7988-bl31-uboot bananapi_bpi-r4-emmc
+  ARTIFACT/snand-preloader.bin	:= mt7988-bl2 spim-nand-ubi-comb
+  ARTIFACT/snand-bl31-uboot.fip	:= mt7988-bl31-uboot bananapi_bpi-r4-snand
+  ARTIFACT/sdcard.img.gz	:= mt798x-gpt sdmmc |\
+				   pad-to 17k | mt7988-bl2 sdmmc-comb |\
+				   pad-to 6656k | mt7988-bl31-uboot bananapi_bpi-r4-sdmmc |\
+				$(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),\
+				   pad-to 12M | append-image-stage initramfs-recovery.itb | check-size 44m |\
+				) \
+				   pad-to 44M | mt7988-bl2 spim-nand-ubi-comb |\
+				   pad-to 45M | mt7988-bl31-uboot bananapi_bpi-r4-snand |\
+				   pad-to 51M | mt7988-bl2 emmc-comb |\
+				   pad-to 52M | mt7988-bl31-uboot bananapi_bpi-r4-emmc |\
+				   pad-to 56M | mt798x-gpt emmc |\
+				$(if $(CONFIG_TARGET_ROOTFS_SQUASHFS),\
+				   pad-to 64M | append-image squashfs-sysupgrade.itb | check-size |\
+				) \
+				  gzip
+  IMAGE_SIZE := $$(shell expr 64 + $$(CONFIG_TARGET_ROOTFS_PARTSIZE))m
+  KERNEL			:= kernel-bin | gzip
+  KERNEL_INITRAMFS := kernel-bin | lzma | \
+	fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb with-initrd | pad-to 64k
+  IMAGE/sysupgrade.itb := append-kernel | fit gzip $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb external-with-rootfs | pad-rootfs | append-metadata
+endef
+TARGET_DEVICES += bananapi_bpi-r4
+
 define Device/cetron_ct3003
   DEVICE_VENDOR := Cetron
   DEVICE_MODEL := CT3003