This variant uses xiaomi factory u-boot and modified u-boot-env &
bootcmd.
By modifying uboot-env, the xiaomi firmware recovery provided in
the vendor u-boot doesn't work anymore. It's possible to put
u-boot into a state where it refuese to take any serial input.
If the u-boot is in this state, users can't restore their
firmware without taking the flash off the board.
We now have a -stock variant where the vendor u-boot is used in
a way that xiaomi firmware recovery still works, and a -ubootmod
variant where we get rid of all xiaomi components, have more
usable space and no uart console lock. These two should cover all
use cases and we don't need this variant anymore.
Drop this redmi-ax6000 variant. Existing users of this variant
should perform a u-boot mod or restore to the -stock layout.
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
U-Boot flash instructions:
0. OpenWrt U-Boot does not support stock layout, it comes with recovery
boot support, automatic tftp recovery and never blocks UART.
A new flash layout is introduced, we call it OpenWrt U-Boot layout,
stock flash layout and the old OpenWrt layout are not supported.
During the whole flash procedure, please do not reboot or power off
unless requested explicitly, or you will break your device.
1. Your device should already running OpenWrt.
If not, follow the instructions to flash OpenWrt:
https://github.com/openwrt/openwrt/pull/11115
2. Backup BL2 Nvram Bdata Factory and FIP in case you break something or
in case you want to go back to stock firmware one day.
cat /dev/mtdblock0 > /tmp/BL2.bin
cat /dev/mtdblock1 > /tmp/Nvram.bin
cat /dev/mtdblock2 > /tmp/Bdata.bin
cat /dev/mtdblock3 > /tmp/Factory.bin
cat /dev/mtdblock4 > /tmp/FIP.bin
And save all whose bin files to somewhere safe.
Then backup your configurations, since ubiformat for entire mtd device is
required to create new ubootenv volume for OpenWrt U-Boot.
3. Run the following cmd to boot into an initramfs with the new OpenWrt
U-Boot layout that expand ubi partion to the end of flash:
ubiformat /dev/mtd7 -y -f /tmp/ax6000-ubootmod-initramfs-factory.ubi
4. After boot into initramfs, check mtd partion info.
The ubi partion should be mtd5
root@OpenWrt:~# cat /proc/mtd
dev: size erasesize name
mtd0: 00100000 00020000 BL2
mtd1: 00040000 00020000 Nvram
mtd2: 00040000 00020000 Bdata
mtd3: 00200000 00020000 Factory
mtd4: 00200000 00020000 FIP
mtd5: 07a80000 00020000 ubi
5. Load kmod-mtd-rw to temporarily make the bootloader partions writable.
The kmod-mtd-rw is from the feeds, it is not packed in initramfs-factory
by default.
To install kmod-mtd-rw via opkg:
opkg update && opkg install kmod-mtd-rw
Or, download kmod-mtd-rw.ipk from OpenWrt server and install it manually
e.g:
https://downloads.openwrt.org/snapshots/targets/mediatek/filogic/kmods/
Select your OpenWrt release version and kernel version accordingly.
Load kmod-mtd-rw:
insmod /lib/modules/$(uname -r)/mtd-rw.ko i_want_a_brick=1
6. Run the following cmd to clean all pending crash dumps in pstore,
or OpenWrt U-Boot may boot into NAND recovery or tftp recovery.
rm -f /sys/fs/pstore/*
7. Format ubi and create new ubootenv volume:
ubidetach -p /dev/mtd5; ubiformat /dev/mtd5 -y; ubiattach -p /dev/mtd5
ubimkvol /dev/ubi0 -n 0 -N ubootenv -s 128KiB
ubimkvol /dev/ubi0 -n 1 -N ubootenv2 -s 128KiB
8. This is optional. Skip this if you do not want to have NAND recovery
boot feature offered by OpenWrt U-Boot. Don't worry, you always have
automatic tftp recovery feature enabled.
ubimkvol /dev/ubi0 -n 2 -N recovery -s 10MiB
ubiupdatevol /dev/ubi0_2 /tmp/ax6000-ubootmod-initramfs-recovery.itb
9. Now, flash new U-Boot. Bye-bye ugly stock U-Boot.
mtd write /tmp/ax6000-ubootmod-preloader.bin BL2
mtd write /tmp/ax6000-ubootmod-bl31-uboot.fip FIP
10. Flash the squashfs-sysupgrade.bin as usual:
sysupgrade -n /tmp/ax6000-ubootmod-squashfs-sysupgrade.itb
Enjoy!
Signed-off-by: Furong Xu <xfr@outlook.com>
In this implementation, the flash partition layout is adjusted to avoid
modifying the uboot environment of mtdparts. This ensures that the 30M
ubi_kernel partition remains aligned with the stock ubi partition, and
the kernel volume is placed in it. This allows the stock uboot to boot
from it without changing the mtdparts, which is useful for reverting back
to the stock firmware using Xiaomi Firmware Tools. In actual testing,
modifying mtdparts has been found to break Xiaomi Firmware Tools.
1. use ARTIFACTS to generate initramfs-factory.ubi for easy installation.
2. The NAND flash layout is changed to allow for reverting back to the
stock firmware.
3. Before performing sysupgrade, do some cleanup in platform_pre_upgrade
to ensure a clean installation of OpenWRT.
4. Setup the uboot env to ensure that the system always boot, which can
be helpful for users who may forget to do this before sysupgrade in
the initramfs.
New flash instructions:
1. Gain ssh access. Please refer to:
https://openwrt.org/toh/xiaomi/redmi_ax6000#installation)
2. Check which system current u-boot is loading from:
COMMAND: `cat /proc/cmdline`
sample OUTPUT: `console=ttyS0,115200n1 loglevel=8 firmware=1 uart_en=1`
if firmware=1, current system is ubi1
if firmware=0, current system is ubi0
3. Setup nvram and write the firmware:
If the current system is ubi1, please set it up so that the next time
it will boot from ubi, and write the firmware to ubi:
```
nvram set boot_wait=on
nvram set uart_en=1
nvram set flag_boot_rootfs=0
nvram set flag_last_success=0
nvram set flag_boot_success=1
nvram set flag_try_sys1_failed=0
nvram set flag_try_sys2_failed=0
nvram commit
ubiformat /dev/mtd8 -y -f /tmp/initramfs-factory.ubi
```
If the current system is ubi, please set it up so that the next time
it will boot from ubi1, and write the firmware to ubi1:
```
nvram set boot_wait=on
nvram set uart_en=1
nvram set flag_boot_rootfs=1
nvram set flag_last_success=1
nvram set flag_boot_success=1
nvram set flag_try_sys1_failed=0
nvram set flag_try_sys2_failed=0
nvram commit
ubiformat /dev/mtd9 -y -f /tmp/initramfs-factory.ubi
```
4. After rebooting, the system should now boot into the openwrt initramfs.
Flash the squashfs-sysupgrade.bin via using ssh or luci.
```
sysupgrade -n /tmp/squashfs-sysupgrade.bin
```
Done.
For existing users of the Redmi AX6000 running OpenWrt, here are the steps to
switch to this new layout:
1. Flash initramfs-factory.ubi
```
mtd -r -e ubi write /tmp/initramfs-factory.ubi ubi
```
2. After rebooting, the system will boot into the new openwrt-initramfs.
Log in and perform a sysupgrade to complete the process.
```
sysupgrade -n /tmp/squashfs-sysupgrade.bin
```
Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
Hardware specification:
SoC: MediaTek MT7986A 4x A53
Flash: ESMT F50L1G41LB 128 MB
RAM: K4A4G165WF-BCWE 512 MB
Ethernet: 4x 10/100/1000 Mbps
WiFi1: MT7976GN 2.4GHz ax 4x4
WiFi2: MT7976AN 5GHz ax 4x4
Button: Mesh, Reset
Flash instructions:
1. Gain ssh and serial port access, see the link below:
https://openwrt.org/toh/xiaomi/redmi_ax6000#installation
2. Use ssh or serial port to log in to the router, and
execute the following command:
nvram set boot_wait=on
nvram set flag_boot_rootfs=0
nvram set flag_boot_success=1
nvram set flag_last_success=1
nvram set flag_try_sys1_failed=8
nvram set flag_try_sys2_failed=8
nvram commit
3. Set a static ip on the ethernet interface of your computer
(e.g. default: ip 192.168.31.100, gateway 192.168.31.1)
4. Download the initramfs image, rename it to initramfs.bin,
and host it with the tftp server.
5. Interrupt U-Boot and run these commands:
setenv mtdparts nmbm0:1024k(bl2),256k(Nvram),256k(Bdata),2048k(factory),2048k(fip),256k(crash),256k(crash_log),112640k(ubi)
saveenv
tftpboot initramfs.bin
bootm
6. After openwrt boots up, use scp or luci web
to upload sysupgrade.bin to upgrade.
Revert to stock firmware:
Restore mtdparts back to default, then use the
vendor's recovery tool (Windows only).
Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
Fix accessing the environment in case no OS is installed on the flash
media selected for boot as this is possible when booting initramfs.
In case of relying on the device specified to be mounted as rootfs to
be present, rather just use the kernel cmdline 'root' variable as a
hint to decide where to read/write the U-Boot environment.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Create new mediatek_filogic file and add entries for environment on
MMC, UBI and NOR for the Bananapi BPi-R3.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
