H3C TX180x series WiFi6 routers are customized by different carrier.
While these three devices look different, they use the same motherboard
inside. Another minor difference comes from the model name definition
in the u-boot environment variable.
Specifications:
SOC: MT7621 + MT7915
ROM: 128 MiB
RAM: 256 MiB
LED: status *2
Button: reset *1 + wps/mesh *1
Ethernet: lan *3 + wan *1 (10/100/1000Mbps)
TTL Baudrate: 115200
TFTP server IP: 192.168.124.99
Compatibility mode is used to guarantee the connection of old devices
that only support WiFi4 or WiFi5.
TFTP + TTL Installation:
Although a TTL connection is required for installation, we do not need
to tear down it. We can find the TTL port from the cooling hole at the
bottom. It is located below LAN3 and the pins are defined as follows:
|LAN1|LAN2|LAN3|----|WAN|
--------------------
|GND|TX|RX|VCC|
1. Set tftp server IP to 192.168.124.99 and put initramfs firmware in
server's root directory, rename it to a simple name "initramfs.bin".
2. Plug in the power supply and wait for power on, connect the TTL cable
and open a TTL session, enter "reboot", then enter "Y" to confirm.
Finally push "0" to interruput boot while booting.
3. Execute command to install a initramfs system:
# tftp 0x80010000 192.168.124.99:initramfs.bin
# bootm 0x80010000
4. Backup nand flash by OpenWrt LuCI or dd instruction. We need those
partitions if we want to back to stock firmwre due to official
website does not provide download link.
# dd if=/dev/mtd1 of=/tmp/u-boot-env.bin
# dd if=/dev/mtd4 of=/tmp/firmware.bin
5. Edit u-boot env to ensure use default bootargs and first image slot:
# fw_setenv bootargs
# fw_setenv bootflag 0
6. Upgrade sysupgrade firmware.
7. About restore stock firmware: flash the "firmware" and "u-boot-env"
partitions that we backed up in step 4.
# mtd write /tmp/u-boot-env.bin u-boot-env
# mtd write /tmp/firmware.bin firmware
Additional Info:
The H3C stock firmware has a 160-byte firmware header that appears to
use a non-standard CRC32 verification algorithm. For this part of the
data, the u-boot does not check it so we can just directly replace it
with a placeholder.
Signed-off-by: Shiji Yang <yangshiji66@qq.com>
The sender domain has a DMARC Reject/Quarantine policy which disallows
sending mailing list messages using the original "From" header.
To mitigate this problem, the original message has been wrapped
automatically by the mailing list software.
Some devices like ZBT WE1326 and ZBT WF3526-P and some Netgear models need
to delay phy port initialization after calling the mt7621_pcie_init_port()
driver function to get into reliable boots for both warm and hard resets.
Signed-off-by: Shiji Yang <yangshiji66@qq.com>
It's reported that current memory detection code occasionally detects
larger memory under some bootloaders.
Current memory detection code tests whether address space wraps around
on KSEG0, which is unreliable because it's cached.
Rewrite memory size detection to perform the same test on KSEG1 instead.
While at it, this patch also does the following two things:
1. use a fixed pattern instead of a random function pointer as the magic
value.
2. add an additional memory write and a second comparison as part of the
test to prevent possible smaller memory detection result due to
leftover values in memory.
Fixes: 6d91ddf517 ("ramips: mt7621: add support for memory detection")
Reported-by: Rui Salvaterra <rsalvaterra@gmail.com>
Tested-by: Rui Salvaterra <rsalvaterra@gmail.com>
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
