openwrt/target/linux/mediatek/dts/mt7986b-mercusys-mr90x-v1-common.dtsi
Mikhail Zhilkin ee8df790ca mediatek: MERCUSYS MR90X v1: add OpenWrt U-Boot (UBI) layout
This commit adds OpenWrt U-Boot (UBI) layout support for MERCUSYS MR90X
v1.

Stock U-Boot UBI size:   50 MiB
OpenWrt U-boot UBI size: 126 MiB

Install
-------
1. Perform steps 1-14 of the OpenWrt installation guide (use OpenWrt
   initramfs-recovery.itb instead of initramfs-kernel.bin at the step 10,
   12 and 14).
Link: https://openwrt.org/toh/mercusys/mr90x_v1#installation

2. Make backups:
```
cat /dev/mtd0 > /tmp/boot.bin
cat /dev/mtd5 > /tmp/tp_data.bin
```
   Copy /tp_data dir content, /tmp/boot.bin and /tmp/tp_data.bin and to
   your PC using scp. You can also backup the remaining partititons. Copy
   backups to a safe place, they are required for the next steps and stock
   firmware recovery.

3. Reboot to OpenWrt initramfs:
```
reboot
```

4. Copy OpenWrt ubi-bl31-uboot.fip, ubi-preloader.bin,
   ubi-squashfs-sysupgrade.itb and MT7986_EEPROM.bin, default-mac (from
   /tp_data backup) to the /tmp folder of the router using scp.

5. Prepare UBI:
```
ubidetach -p /dev/mtd3; ubiformat /dev/mtd3 -y; ubiattach -p /dev/mtd3
ubimkvol /dev/ubi0 -N fip -t static -s 1MiB
ubiupdatevol /dev/ubi0_0 /tmp/ubi-bl31-uboot.fip
ubimkvol /dev/ubi0 -N ubootenv -s 0x1f000
ubimkvol /dev/ubi0 -N ubootenv2 -s 0x1f000
```

6.  Install kmod-mtd-rw and unlock partitions:
```
opkg update && opkg install kmod-mtd-rw
insmod mtd-rw i_want_a_brick=1
mtd unlock boot
mtd unlock bl2
mtd unlock factory
```

7. Prepare "factory" partition:
```
dd if=/dev/zero bs=$((0x8000)) count=1 | tr '\000' '\377' > /tmp/factory.bin
dd if=/tmp/MT7986_EEPROM.bin of=/tmp/factory.bin conv=notrunc
dd if=/tmp/default-mac >> /tmp/factory.bin
```

8. Write "factory" partition:
```
mtd erase factory
mtd write /tmp/factory.bin factory
```

9. Write preloader partition:
```
mtd erase bl2
mtd write /tmp/ubi-preloader.bin bl2
```

10. Write OpenWrt sysupgrade image:
```
sysupgrade -n /tmp/ubi-squashfs-sysupgrade.itb
```

Recovery
--------
1. Place OpenWrt initramfs-recovery.itb image (with original name) on the
   tftp server (IP: 192.168.1.254).
2. Press "reset" button and power on the router. After ~10 sec release the
   button.
3. Use OpenWrt initramfs system for recovery.

BL2 and FIP recovery
--------------------
Use mtk_uartboot and UART connetion if BL2 or FIP in UBI is destroyed:
Link: https://github.com/981213/mtk_uartboot
Link: https://openwrt.org/toh/mercusys/mr90x_v1#serial

Return to stock:
----------------
1. Copy "boot" partition backup (boot.bin) to the /tmp dir of the router
   using scp.

2. Install kmod-mtd-rw:
```
opkg update && opkg install kmod-mtd-rw
```

3. Restore stock U-Boot:
```
   insmod mtd-rw i_want_a_brick=1
   mtd unlock boot
   mtd erase boot
   mtd write /tmp/boot.bin boot
```

4. Erase UBI and reboot:
```
mtd erase ubi
reboot
```

5. Open U-Boot web recovery, upload stock firmware image and start
   upgrade.
Link: http://192.168.1.1

6. Complete steps 1-9 of the OpenWrt installation guide to get root
   rights.
Link: https://openwrt.org/toh/mercusys/mr90x_v1#installation

7. Upload "tp_data" partition backup (tp_data.bin) to the /tmp folder of
   the router using scp.

8. Restore stock calibrations:
```
mtd write /tmp/tp_data.bin tp_data
reboot
```

9. Perform "factory restore" via stock firmware web interface.

Signed-off-by: Mikhail Zhilkin <csharper2005@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/16744
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2024-11-30 18:36:05 +01:00

253 lines
4.3 KiB
Plaintext

// SPDX-License-Identifier: (GL-2.0 OR MIT)
/dts-v1/;
#include <dt-bindings/input/input.h>
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/leds/common.h>
#include "mt7986b.dtsi"
/ {
aliases: aliases {
led-boot = &led_status_green;
led-failsafe = &led_status_green;
led-running = &led_status_green;
led-upgrade = &led_status_green;
serial0 = &uart0;
};
chosen: chosen {
stdout-path = "serial0:115200n8";
};
memory {
reg = <0 0x40000000 0 0x20000000>;
};
keys {
compatible = "gpio-keys";
reset {
label = "reset";
gpios = <&pio 10 GPIO_ACTIVE_LOW>;
linux,code = <KEY_RESTART>;
};
};
leds {
compatible = "gpio-leds";
led-0 {
color = <LED_COLOR_ID_GREEN>;
function = LED_FUNCTION_LAN;
function-enumerator = <2>;
gpios = <&pio 7 GPIO_ACTIVE_LOW>;
};
led-1 {
color = <LED_COLOR_ID_GREEN>;
function = LED_FUNCTION_LAN;
function-enumerator = <1>;
gpios = <&pio 9 GPIO_ACTIVE_LOW>;
};
led-2 {
color = <LED_COLOR_ID_GREEN>;
function = LED_FUNCTION_LAN;
function-enumerator = <0>;
gpios = <&pio 12 GPIO_ACTIVE_LOW>;
};
led-3 {
color = <LED_COLOR_ID_GREEN>;
function = LED_FUNCTION_WAN;
gpios = <&pio 13 GPIO_ACTIVE_LOW>;
};
led-4 {
color = <LED_COLOR_ID_AMBER>;
function = LED_FUNCTION_STATUS;
gpios = <&pio 16 GPIO_ACTIVE_HIGH>;
panic-indicator;
};
led_status_green: led-5 {
color = <LED_COLOR_ID_GREEN>;
function = LED_FUNCTION_STATUS;
gpios = <&pio 17 GPIO_ACTIVE_HIGH>;
};
};
};
&crypto {
status = "okay";
};
&eth {
status = "okay";
gmac0: mac@0 {
compatible = "mediatek,eth-mac";
reg = <0>;
phy-mode = "2500base-x";
fixed-link {
speed = <2500>;
full-duplex;
pause;
};
};
gmac1: mac@1 {
compatible = "mediatek,eth-mac";
reg = <1>;
phy-handle = <&phy6>;
phy-mode = "2500base-x";
};
mdio: mdio-bus {
#address-cells = <1>;
#size-cells = <0>;
};
};
&mdio {
#address-cells = <1>;
#size-cells = <0>;
reset-gpios = <&pio 6 GPIO_ACTIVE_LOW>;
reset-delay-us = <1500000>;
reset-post-delay-us = <1000000>;
/* WAN/LAN 2.5Gbps phy
MaxLinear GPY211C0VC (SLNW8) */
phy6: phy@6 {
compatible = "ethernet-phy-ieee802.3-c45";
reg = <6>;
};
switch: switch@1f {
compatible = "mediatek,mt7531";
reg = <31>;
reset-gpios = <&pio 5 GPIO_ACTIVE_HIGH>;
};
};
&switch {
ports {
#address-cells = <1>;
#size-cells = <0>;
/* WAN/LAN 1Gbps port */
port@0 {
reg = <0>;
label = "lan0";
};
/* LAN1 port */
port@1 {
reg = <1>;
label = "lan1";
};
/* LAN2 port */
port@2 {
reg = <2>;
label = "lan2";
};
port@6 {
reg = <6>;
ethernet = <&gmac0>;
phy-mode = "2500base-x";
fixed-link {
speed = <2500>;
full-duplex;
pause;
};
};
};
};
&pio {
spi_flash_pins: spi-flash-pins-33-to-38 {
mux {
function = "spi";
groups = "spi0", "spi0_wp_hold";
};
conf-pu {
pins = "SPI2_CS", "SPI2_HOLD", "SPI2_WP";
drive-strength = <8>;
mediatek,pull-up-adv = <0>; /* bias-disable */
};
conf-pd {
pins = "SPI2_CLK", "SPI2_MOSI", "SPI2_MISO";
drive-strength = <8>;
mediatek,pull-down-adv = <0>; /* bias-disable */
};
};
wf_2g_5g_pins: wf_2g_5g-pins {
mux {
function = "wifi";
groups = "wf_2g", "wf_5g";
};
conf {
pins = "WF0_HB1", "WF0_HB2", "WF0_HB3", "WF0_HB4",
"WF0_HB0", "WF0_HB0_B", "WF0_HB5", "WF0_HB6",
"WF0_HB7", "WF0_HB8", "WF0_HB9", "WF0_HB10",
"WF0_TOP_CLK", "WF0_TOP_DATA", "WF1_HB1",
"WF1_HB2", "WF1_HB3", "WF1_HB4", "WF1_HB0",
"WF1_HB5", "WF1_HB6", "WF1_HB7", "WF1_HB8",
"WF1_TOP_CLK", "WF1_TOP_DATA";
drive-strength = <4>;
};
};
};
&spi0 {
pinctrl-names = "default";
pinctrl-0 = <&spi_flash_pins>;
status = "okay";
spi_nand_flash: flash@0 {
compatible = "spi-nand";
#address-cells = <1>;
#size-cells = <1>;
reg = <0>;
spi-max-frequency = <20000000>;
spi-tx-bus-width = <4>;
spi-rx-bus-width = <4>;
partitions: partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
};
};
};
&trng {
status = "okay";
};
&uart0 {
status = "okay";
};
&watchdog {
status = "okay";
};
&wifi {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&wf_2g_5g_pins>;
ieee80211-freq-limit = <2400000 2500000>, <5170000 5835000>;
};