https://wiki.banana-pi.org/Banana_Pi_BPI-R3

• mt7986a SoC
• mt7531 Ethernet-switch

• SD / eMMC sharing 1 mmc-controller in SoC
  • SD 4bit bus, eMMC 8bit
  • switched first 4 data-lanes by sw6 (bottom)
• SPI NAND/NOR sharing SPI0-Bus
  • CS switched by sw5

sw2 on top of board near debug-uart chooses between SPI and MMC

gmac1----(p6)mt7531(P1-4)--LANx4
                     (P0)----WAN
                     (p5)---right SFP slot
gmac2----left SFP slot

https://forum.banana-pi.org/t/bpi-r3-information/12897/4

We have both sfp recognized and working

mount -t debugfs none /sys/kernel/debug/
cat /sys/kernel/debug/sfp1/state

Firmware: https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/mediatek

WLAN

mPCIe slot is usb-only with SIM connector (bottom of board). PCIe is mapped to m.2 key-m slot for nvme SSD

Sata possible via M.2 KEY-M 2lane interface on bottom side of board

I tested mpcie slot with an em7455 LTE module (+key b adapter)

gpio

available via sysfs:

• green: power
• blue: status

additional with function

• wf2g (mapped by mt76 driver and creates sysfs entry) - can be switched on but not off, maybe handled by mt76 driver on traffic
• wf5g (mapped through pinctrl, but no sysctl entry and not mapped into mt76 driver afaik)
• ssd: blinks on write access on m2-slot (nvme)
• lte: maybe on traffic

32MB kernel/256MB root: gpt_sd-20220216.bin

create own partition table: (currently i try to port to python3,but get crc error, so only python2-support):

https://github.com/frank-w/BPI-R3-bsp/tree/r3-atf/tools/mediatek/gpt_editor

(cd tools/mediatek/gpt_editor/;python mtk_gpt.py --i example/mt7986-sd.json --o GPT_SD)

Created a gpt with 100mb kernel+6GB root partition with an python2 venv

https://github.com/frank-w/BPI-R3-bsp/blob/r3-atf/gpt_sdmmc_100m6g.img

U-Boot

Daniels code: https://github.com/dangowrt/arm-trusted-firmware/tree/mtksoc-v2.6/

https://git.openwrt.org/?p=openwrt/staging/dangole.git;a=shortlog;h=refs/heads/r3-mt7986

patches for mt7986

Own repo: https://github.com/frank-w/BPI-R2-4.14/commits/5.19-r3

./build.sh importconfig
./build.sh #build kernel

Then copy bpi-r3.itb to card and start from uboot with commands listed above (setenv, fatload, bootm)

https://git.openwrt.org/?p=openwrt/staging/nbd.git;a=tree;f=target/linux/mediatek/patches-5.15;hb=HEAD

https://git.openwrt.org/?p=openwrt/staging/dangole.git;a=shortlog;h=refs/heads/r3-mt7986

Build instructions: https://forum.banana-pi.org/t/banana-pi-r3-bsp-source-code/14257/2

Add more space on storage: https://forum.banana-pi.org/t/bpi-r3-change-or-add-partion-to-overlay/14240/12

root@bpi-r3:~# date -s "2022-09-18 18:02:00+0200"
root@bpi-r3:~# ip link set lan4 up
root@bpi-r3:~# ip addr add 192.168.0.19/24 dev lan4       
root@bpi-r3:~# ip route add default via 192.168.0.10     
root@bpi-r3:~# apt update
root@bpi-r3:~# apt install pciutils usbutils traceroute iperf3 net-tools psmisc wget curl

V1.0:

• reset switch low/pressed when card in m2 slot (link)

V1.1:

• wifi is not recognized when debug-uart connected (link)
  • bpi reports only affects profilic adapters, ch340,cp2102,FT4232 are ok (link)
• reset-bug still there
  • is reported to be fixed in v1.2 (untested)
• dual-nor (no nand) reported by 1 user link