Globalscale MOCHAbin

→ Install OpenWrt (generic explanation)

1. Copy dtb from build_dir to bin/ and run tftpserver there:

   $ cp ./build_dir/target-aarch64_cortex-a72_musl/linux-mvebu_cortexa72/image-armada-7040-mochabin.dtb bin/targets/mvebu/cortexa72/
   $ in.tftpd -L -s bin/targets/mvebu/cortexa72/

2. Connect to the device UART via microUSB port and power on the device.
3. Power on the device and hit any key to stop the autoboot.
4. Set serverip (host IP) and ipaddr (any free IP address on the same subnet), e.g:
   • Host:

     $ setenv serverip 192.168.1.10

   • Device:

     $ setenv ipaddr 192.168.1.15

5. Set the ethernet device (Example for the 1G WAN):

   $ setenv ethact mvpp2-2

6. Ping server to confirm network is working:

   $ ping $serverip
   Using mvpp2-2 device
   host 192.168.1.15 is alive

7. Tftpboot the firmware:

   $ tftpboot $kernel_addr_r openwrt-mvebu-cortexa72-globalscale_mochabin-initramfs-kernel.bin
   $ tftpboot $fdt_addr_r image-armada-7040-mochabin.dtb

8. Boot the image:

   $ booti $kernel_addr_r - $fdt_addr_r

9. Once the initramfs is booted, transfer openwrt-mvebu-cortexa72-globalscale_mochabin-squashfs-sdcard.img.gz to /tmp dir on the device.
10. Gunzip and dd the image:

    $ gunzip /tmp/openwrt-mvebu-cortexa72-globalscale_mochabin-squashfs-sdcard.img.gz
    $ dd if=/tmp/openwrt-mvebu-cortexa72-globalscale_mochabin-squashfs-sdcard.img of=/dev/mmcblk0 && sync

11. Reboot the device.
12. Hit any key to stop the autoboot.
13. Reset U-boot env and set the bootcmd:

    $ env default -a
    $ setenv bootcmd 'load mmc 0 ${loadaddr} boot.scr && source ${loadaddr}'

14. Optionally I would advise to edit the console env variable to remove earlycon as that causes the kernel to never use the driver for the serial console. Earlycon should be used only for debugging before the kernel can configure the console and will otherwise cause various issues with the console.

    $ setenv console 'console=ttyS0,115200'

15. Save and reset

    $ saveenv
    $ reset

16. OpenWrt should boot from eMMC now.

→ generic.sysupgrade

cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
sysupgrade /tmp/xxx.abc

cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
mtd write /tmp/xxx.abc linux && reboot

The Qualcomm (QCA6391) is not yet supported (v22.03.04). To enable Wifi6, if the Qualcomm adapter is built in, the latest snapshot have to be used (https://downloads.openwrt.org/snapshots/targets/mvebu/cortexa72/openwrt-mvebu-cortexa72-globalscale_mochabin-squashfs-sdcard.img.gz, 06/11/23 when writing).

After booting the device, the following commands via SSH need to be executed:

opkg update
opkg install kmod-ath11k kmod-ath11k-pci ath11k-firmware-qca6390

Check your partitions, especially for partition /dev/loop0 having filesystem type f2fs:

root@OpenWrt:~# df -Th
Filesystem           Type            Size      Used Available Use% Mounted on
/dev/root            squashfs        3.5M      3.5M         0 100% /rom
tmpfs                tmpfs           3.9G      1.1M      3.9G   0% /tmp
/dev/loop0           f2fs           98.8M     61.5M     37.3M   62% /overlay
overlayfs:/overlay   overlay        98.8M     61.5M     37.3M   62% /
tmpfs                tmpfs         512.0K         0    512.0K   0% /dev

Install the following packages:

opkg update
opkg install losetup e2fsprogs resize2fs block-mount kmod-fs-f2fs f2fs-tools cfdisk kmod-fs-ext4 parted rsync

Confirm, that the device /dev/loop0 is located on the 2nd partition of mmcblk0 by checking the back file column:

root@OpenWrt:~# losetup
NAME       SIZELIMIT  OFFSET AUTOCLEAR RO BACK-FILE  DIO LOG-SEC
/dev/loop0         0 3604480         1  0 /mmcblk0p2   0     512

Resize the partition mmcblk0p2 by using cfdsik:

root@OpenWrt:~# cfdisk /dev/mmcblk0

Steps for resizing:

1. Chose the 2nd partition,
2. Move the cursor to resize,
3. Enter the final size you want, default is 14.7GB.
4. Confirm the change by the menu entry “Write”.

Set variables, that are used later:

LOOP="$(losetup -n -O NAME | sort | sed -n -e "1p")"
ROOT="$(losetup -n -O BACK-FILE ${LOOP} | sed -e "s|^|/dev|")"
OFFS="$(losetup -n -O OFFSET ${LOOP})"

Check the variables withe echo command:

root@OpenWrt:~# echo ${OFFS} ${LOOP} ${ROOT}
3604480 /dev/loop0 /dev/mmcblk0p2

The loop device setup:

LOOP="$(losetup -f)"
losetup -o ${OFFS} ${LOOP} ${ROOT}

Finalize the partition resize:

fsck.f2fs -f ${LOOP}  #and go for default options if given any
mount ${LOOP} /mnt
umount ${LOOP}
resize.f2fs ${LOOP}
reboot

After reboot, you can confirm the full partition size on SSH and LuCi:

root@OpenWrt:~# df -Th
Filesystem           Type            Size      Used Available Use% Mounted on
/dev/root            squashfs        3.5M      3.5M         0 100% /rom
tmpfs                tmpfs           3.9G    240.0K      3.9G   0% /tmp
/dev/loop0           f2fs           14.7G    609.8M     14.1G   4% /overlay
overlayfs:/overlay   overlay        14.7G    609.8M     14.1G   4% /
tmpfs                tmpfs         512.0K         0    512.0K   0% /dev

→ generic.debrick

→ failsafe_and_factory_reset

→ Basic configuration After flashing, proceed with this.
Set up your Internet connection, configure wireless, configure USB port, etc.

→ hardware.button on howto use and configure the hardware button(s). Here, we merely name the buttons, so we can use them in the above Howto.

Front:
Insert photo of front of the casing

Back:

Main PCB:

→ port.serial general information about the serial port, serial port cable, etc.

How to connect to the Serial Port of this specific device:

• Connect the micro USB port to the computer. (The UART adapter is integrated on the board)

→ port.jtag general information about the JTAG port, JTAG cable, etc.

JTAG schematic:

→ bootloader

None so far.

Space for additional notes, links to forum threads or other resources.

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