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Hardware
========
SoC: Qualcomm IPQ4018
ETH: Qualcomm QCA8075 (2 x RJ-45)
WDG: OnSemi SCT706
RAM: Micron MT41K128M16JT-125 (256MB)
NOR: Infineon S25FL512S (64MB)
Installation
============
1. Create a ramboot-able image with the command
{ dd if=/dev/zero bs=32 count=1 2>/dev/null; \
cat openwrt-ipq40xx-generic-huawei_ap4050dn-initramfs-uImage.itb; \
} > ramboot.bin`
2. Start a TFTP server in the folder with the ramboot.bin.
3. Plug in a USB-RJ45 serial adapter to the CONSOLE port of the device
and start a serial console session with
9600 baud, no parity, 1 stop bit.
4. Plug in either 12V power or PoE to the device.
5. On the prompt `Press f or F to stop Auto-Boot in 3 seconds`,
press `f` to enter the Huawei U-Boot command line
6. Enter a new password for the u-boot command line
7. In the command line, run these commands to ramboot OpenWrt:
setenv serverip <IPv4 address of TFTP server>
setenv ipaddr <IPv4 address for this AP>
setenv rambootfile ramboot.bin
run ramboot
8. In OpenWrt, set up the network and then `scp` the files
`u-boot-huawei_ap4050dn/uImage` and
`openwrt-ipq40xx-generic-huawei_ap4050dn-squashfs-sysupgrade.bin`
into `/tmp/`
9. To backup the original firmware, run the following:
cat /dev/mtd12 /dev/mtd13 > huawei_ap4050dn_fw_backup.bin.bin
10. Run the following commands to flash u-boot and OpenWrt to the device:
mtd erase uboot
mtd write /tmp/uImage uboot
sysupgrade -n /tmp/openwrt-ipq40xx-generic-huawei_ap4050dn-squashfs-sysupgrade.bin
11. The device should now boot OpenWrt! (sometimes the boot process takes a bit
longer due to the watchdog resetting the device before the watchdog driver runs)
Signed-off-by: Marco von Rosenberg <marcovr@selfnet.de>