i have the original flash memory destroyed
I simply cut the legs of the memory and cleaned the circuit prints
I soldered the new 8-pin spi memory 32M spi-nor MX25L25635E to the available location and put the two jumpers J10 and J11
i can use luci-app-samba4 with 32M flash & OpenWrt 21.02
for build openwrt 21.02.rc3 release
1 - add a section in mt7621.mk with this:
define Device/xiaomi-mi-router-3g_32M
$(Device/dsa-migration)
$(Device/uimage-lzma-loader)
IMAGE_SIZE := 32132k
DEVICE_VENDOR := XIAOMI
DEVICE_MODEL := R3G-32M
DEVICE_PACKAGES := kmod-mt7603 kmod-mt76x2 kmod-usb3 \
kmod-usb-ledtrig-usbport
endef
TARGET_DEVICES += xiaomi-mi-router-3g_32M
2 - add a file mt7621_xiaomi-mi-router-3g_32M.dts with this content:
// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
#include "mt7621.dtsi"
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>
/ {
compatible = "xiaomi,r3g-32M", "mediatek,mt7621-soc";
model = "XIAOMI R3G-32M";
aliases {
led-boot = &led_status_yellow;
led-failsafe = &led_status_red;
led-running = &led_status_blue;
led-upgrade = &led_status_yellow;
label-mac-device = &gmac0;
};
chosen {
bootargs = "console=ttyS0,115200";
};
leds {
compatible = "gpio-leds";
led_status_red: status_red {
label = "red:status";
gpios = <&gpio 6 GPIO_ACTIVE_LOW>;
};
led_status_blue: status_blue {
label = "blue:status";
gpios = <&gpio 8 GPIO_ACTIVE_LOW>;
};
led_status_yellow: status_yellow {
label = "yellow:status";
gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
};
wan_amber {
label = "amber:wan";
gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
linux,default-trigger = "dsa-0.0:01:1Gbps";
};
lan1_amber {
label = "amber:lan1";
gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
linux,default-trigger = "dsa-0.0:03:1Gbps";
};
lan2_amber {
label = "amber:lan2";
gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
linux,default-trigger = "dsa-0.0:02:1Gbps";
};
};
reg_usb_vbus: regulator {
compatible = "regulator-fixed";
regulator-name = "usb_vbus";
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
gpio = <&gpio 12 GPIO_ACTIVE_HIGH>;
enable-active-high;
};
};
&xhci {
vbus-supply = <®_usb_vbus>;
};
&spi0 {
status = "okay";
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <10000000>;
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
partition@0 {
label = "u-boot";
reg = <0x0 0x30000>;
read-only;
};
partition@30000 {
label = "u-boot-env";
reg = <0x30000 0x10000>;
read-only;
};
factory: partition@40000 {
label = "factory";
reg = <0x40000 0x10000>;
read-only;
};
partition@50000 {
compatible = "denx,uimage";
label = "firmware";
reg = <0x50000 0x1fb0000>;
};
};
};
};
&pcie {
status = "okay";
};
&pcie0 {
wifi@0,0 {
compatible = "pci14c3,7603";
reg = <0x0000 0 0 0 0>;
mediatek,mtd-eeprom = <&factory 0x0000>;
ieee80211-freq-limit = <2400000 2500000>;
led {
led-active-low;
};
};
};
&pcie1 {
wifi@0,0 {
compatible = "pci14c3,7662";
reg = <0x0000 0 0 0 0>;
mediatek,mtd-eeprom = <&factory 0x8000>;
ieee80211-freq-limit = <5000000 6000000>;
led {
led-sources = <2>;
led-active-low;
};
};
};
&gmac0 {
mtd-mac-address = <&factory 0xe000>;
};
&switch0 {
ports {
port@2 {
status = "okay";
label = "lan1";
};
port@3 {
status = "okay";
label = "lan2";
};
wan: port@1 {
status = "okay";
label = "wan";
mtd-mac-address = <&factory 0xe006>;
};
};
};
&state_default {
gpio {
groups = "jtag", "uart2", "uart3", "wdt";
function = "gpio";
};
};
everything seems to be working fine except for the automount with ntfs-3g where I had to launch:
ln -f -s $(readlink -f $(type -p ntfs-3g)) /sbin/mount.ntfs