ramips: add support for ASUS RT-N65U

ASUS RT-N65U is a 2.4/5 GHz band 11n (Wi-Fi 4) router, based on RT3883.

Specification:
- CPU1: Ralink RT3883 @ 500MHz, WiSoC 5GHz
- CPU2: Ralink RT3352 @ 400MHz, WiSoC 2.4GHz
- RAM1: 128MB
- RAM2: 16MB
- Flash: Macronix MX25L12805D (16MB)
- WLAN: Ralink RT3883 (5GHz 3T3R), Ralink RT3352 (2.4GHz 2T2R)
- Switch: Realtek RTL8367RB
- 4x 10/100/1000 Mbps Ethernet
- 1x 10/100/1000 Mbps WAN
- USB: ASMedia ASM1042 USB 3.0 Controller
- PMU: UTC UZ1086L-ADJ
- 6x LED, 2x button

Installation (TFTP):
1. Power off the router.
2. Press and hold the Reset button.
3. Power on the router.
4. Wait 5 seconds, then release the Reset button.
5. Connect your PC to the router with Ethernet cable.
6. Configure a static IP address in the `192.168.1.0/24` subnet (except `192.168.1.1`).
7. Configure your TFTP client to use binary (octet) transfer mode.
8. Upload the firmware image (OpenWrt, stock, or Padavan) to `192.168.1.1`.
   The TFTP server accepts any filename.
9. Wait for the firmware flashing process to complete.

WARNING: Flashing the stock firmware after using Padavan may brick
your router due to configuration partition incompatibility.

MAC address layout:
- Wi-Fi 2.4GHz & WAN: label MAC
- Wi-Fi 5GHz & LAN: label MAC + 4

MTD layout:
```
mtd0: 00030000 00010000 "u-boot"
mtd1: 00010000 00010000 "config"
mtd2: 00010000 00010000 "factory"
mtd3: 00fb0000 00010000 "firmware"
mtd4: 001ee3b3 00010000 "kernel"
mtd5: 00dc1c4d 00010000 "rootfs"
mtd6: 00960000 00010000 "rootfs_data"
```

Known issues:
- The RT3352 2.4 GHz iNIC is unsupported because it requires a
  proprietary firmware blob and kernel support
- The Wi-Fi LEDs cannot be disabled independently because they share
  the LED power rail controlled by GPIO10

This work is based on the earlier draft support by Andrej Valek.

Tested by 4PDA users

Signed-off-by: Andrej Valek <andy@skyrain.eu>
Signed-off-by: Andrey Trishin <zatrit@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/24343
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/target/linux/ramips/dts/rt3883_asus_rt-n65u.dts b/target/linux/ramips/dts/rt3883_asus_rt-n65u.dts
new file mode 100644 (file)
index 0000000..a17be76
--- /dev/null
+++ b/target/linux/ramips/dts/rt3883_asus_rt-n65u.dts
@@ -0,0 +1,196 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+#include "rt3883.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+       compatible = "asus,rt-n65u", "ralink,rt3883-soc";
+       model = "Asus RT-N65U";
+
+       aliases {
+               led-boot = &led_power;
+               led-failsafe = &led_power;
+               led-running = &led_power;
+               led-upgrade = &led_power;
+       };
+
+       chosen {
+               bootargs = "console=ttyS0,115200";
+       };
+
+       rtl8367rb {
+               compatible = "realtek,rtl8367b";
+               realtek,extif = <6 1 0 1 1 1 1 1 1 2>;
+               mii-bus = <&mdio0>;
+       };
+
+       keys {
+               compatible = "gpio-keys";
+
+               reset {
+                       label = "reset";
+                       gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
+                       linux,code = <KEY_RESTART>;
+               };
+
+               wps {
+                       label = "wps";
+                       gpios = <&gpio1 2 GPIO_ACTIVE_LOW>;
+                       linux,code = <KEY_WPS_BUTTON>;
+               };
+       };
+
+       leds {
+               compatible = "gpio-leds";
+
+               led_power: power { // PWR
+                       function = LED_FUNCTION_POWER;
+                       color = <LED_COLOR_ID_BLUE>;
+                       gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
+               };
+
+               lan { // LAN
+                       function = LED_FUNCTION_LAN;
+                       color = <LED_COLOR_ID_BLUE>;
+                       gpios = <&gpio0 19 GPIO_ACTIVE_LOW>;
+               };
+
+               wan { // WAN
+                       function = LED_FUNCTION_WAN;
+                       color = <LED_COLOR_ID_BLUE>;
+                       gpios = <&gpio1 3 GPIO_ACTIVE_LOW>;
+               };
+
+               usb { // USB
+                       function = LED_FUNCTION_USB;
+                       color = <LED_COLOR_ID_BLUE>;
+                       gpios = <&gpio1 0 GPIO_ACTIVE_LOW>;
+               };
+
+               // There are also two LEDs for Wi-Fi:
+               // - AIR2 (2.4GHz) can be turned on via <&gpio0 1 GPIO_ACTIVE_LOW>,
+               //       but not off: the RT3352 iNIC coprocessor drives the same line
+               //       independently, so it isn't declared as a controllable LED here.
+               // - AIR5 (5GHz) is tied directly to the wmac radio state and turns
+               //       on/off automatically with it; no separate GPIO controls it.
+       };
+};
+
+&spi0 {
+       status = "okay";
+
+       flash@0 {
+               compatible = "jedec,spi-nor";
+               reg = <0>;
+               spi-max-frequency = <25000000>;
+
+               partitions {
+                       compatible = "fixed-partitions";
+                       #address-cells = <1>;
+                       #size-cells = <1>;
+
+                       partition@0 {
+                               label = "u-boot";
+                               reg = <0x0 0x30000>;
+                               read-only;
+                       };
+
+                       partition@30000 {
+                               label = "config";
+                               reg = <0x30000 0x10000>;
+                               read-only;
+                       };
+
+                       partition@40000 {
+                               label = "factory";
+                               reg = <0x40000 0x10000>;
+                               read-only;
+
+                               nvmem-layout {
+                                       compatible = "fixed-layout";
+                                       #address-cells = <1>;
+                                       #size-cells = <1>;
+
+                                       eeprom_factory_0: eeprom@0 {
+                                               reg = <0x0 0x200>;
+                                       };
+
+                                       macaddr_factory_4: macaddr@4 {
+                                               reg = <0x4 0x6>;
+                                       };
+                               };
+                       };
+
+                       partition@50000 {
+                               compatible = "denx,uimage";
+                               label = "firmware";
+                               reg = <0x50000 0xfb0000>;
+                       };
+               };
+       };
+};
+
+&gpio0 {
+       // Enables the LED power rail (all LEDs except PWR).
+       led_all_enable {
+               gpio-hog;
+               gpios = <10 GPIO_ACTIVE_HIGH>;
+               output-low;
+               line-name = "led-all-enable";
+       };
+};
+
+&gpio1 {
+       status = "okay";
+};
+
+&state_default {
+       gpio {
+               groups = "i2c", "jtag", "uartf";
+               function = "gpio";
+       };
+};
+
+&pinctrl {
+       mdio_pins: mdio {
+               mdio {
+                       groups = "mdio";
+                       function = "mdio";
+               };
+       };
+};
+
+&ethernet {
+       pinctrl-names = "default";
+       pinctrl-0 = <&mdio_pins>;
+
+       nvmem-cells = <&macaddr_factory_4>;
+       nvmem-cell-names = "mac-address";
+
+       port@0 {
+               status = "okay";
+               mediatek,fixed-link = <1000 1 1 1>;
+               phy-mode = "rgmii";
+       };
+
+       mdio0: mdio-bus {
+               status = "okay";
+       };
+};
+
+&pci {
+       status = "okay";
+};
+
+// PCI port connected to the onboard USB 3.0 host controller.
+&pci1 {
+       status = "okay";
+};
+
+&wmac {
+       ralink,2ghz = <0>;
+       nvmem-cells = <&eeprom_factory_0>;
+       nvmem-cell-names = "eeprom";
+};

diff --git a/target/linux/ramips/image/rt3883.mk b/target/linux/ramips/image/rt3883.mk
index 1728f8444438e7991121ff639ada29c0edb9c010..b78c32eff17d63ee4bd030dcc6ce078044eb2773 100644 (file)
--- a/target/linux/ramips/image/rt3883.mk
+++ b/target/linux/ramips/image/rt3883.mk
@@ -17,6 +17,17 @@ define Device/asus_rt-n56u
 endef
 TARGET_DEVICES += asus_rt-n56u
 
+define Device/asus_rt-n65u
+  $(Device/uimage-lzma-loader)
+  SOC := rt3883
+  BLOCKSIZE := 64k
+  IMAGE_SIZE := 16064k
+  DEVICE_VENDOR := ASUS
+  DEVICE_MODEL := RT-N65U
+  DEVICE_PACKAGES := kmod-usb3 kmod-usb-ledtrig-usbport kmod-switch-rtl8367b
+endef
+TARGET_DEVICES += asus_rt-n65u
+
 define Device/belkin_f9k1109v1
   $(Device/uimage-lzma-loader)
   SOC := rt3883

diff --git a/target/linux/ramips/rt3883/base-files/etc/board.d/01_leds b/target/linux/ramips/rt3883/base-files/etc/board.d/01_leds
index ecae088d88ffdf93c8d9e0c777c8d14db2cc2fc3..f2af562cbd6e4a0b2f470a8696cfc5eadcca5466 100644 (file)
--- a/target/linux/ramips/rt3883/base-files/etc/board.d/01_leds
+++ b/target/linux/ramips/rt3883/base-files/etc/board.d/01_leds
@@ -7,6 +7,12 @@ board=$(board_name)
 board_config_update
 
 case $board in
+asus,rt-n65u)
+       ucidef_set_led_netdev "lan" "LAN" "blue:lan" "eth0.1" "tx rx"
+       ucidef_set_led_netdev "wan" "WAN" "blue:wan" "eth0.2" "tx rx"
+       ucidef_set_led_usbport "usb" "USB" "blue:usb" \
+               "usb1-port1" "usb1-port2" "usb2-port1" "usb2-port2"
+       ;;
 belkin,f9k1109v1)
        ucidef_set_led_netdev "lan" "lan" "blue:wps" "eth0"
        ;;

diff --git a/target/linux/ramips/rt3883/base-files/etc/board.d/02_network b/target/linux/ramips/rt3883/base-files/etc/board.d/02_network
index 519afe632944f9f233a67ebce3cf98f353366e68..60bb533ab2ae54695ed33d736ec924d5f646b710 100644 (file)
--- a/target/linux/ramips/rt3883/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/rt3883/base-files/etc/board.d/02_network
@@ -12,14 +12,15 @@ ramips_setup_interfaces()
                ucidef_add_switch "switch0" \
                        "0:lan" "1:lan" "2:lan" "3:lan" "4:wan" "8@eth0"
                ;;
-       belkin,f9k1109v1)
-               ucidef_add_switch "switch0" \
-                       "0:lan" "1:lan" "2:lan" "3:lan" "4:wan" "5@eth0"
-               ;;
+       asus,rt-n65u|\
        dlink,dir-645)
                ucidef_add_switch "switch0" \
                        "1:lan" "2:lan" "3:lan" "4:lan" "0:wan" "6@eth0"
                ;;
+       belkin,f9k1109v1)
+               ucidef_add_switch "switch0" \
+                       "0:lan" "1:lan" "2:lan" "3:lan" "4:wan" "5@eth0"
+               ;;
        edimax,br-6475nd)
                ucidef_add_switch "switch0" \
                        "1:lan" "2:lan" "3:lan" "4:lan" "0:wan" "9@eth0"
@@ -54,6 +55,10 @@ ramips_setup_macs()
                lan_mac=$(macaddr_setbit_la "$(cat /sys/class/net/eth0/address)")
                wan_mac=$(mtd_get_mac_binary factory 0x8004)
                ;;
+       asus,rt-n65u)
+               wan_mac=$(macaddr_add "$(mtd_get_mac_binary factory 0x4)" -4)
+               label_mac=$wan_mac
+               ;;
        belkin,f9k1109v1)
                wan_mac=$(mtd_get_mac_ascii uboot-env HW_WAN_MAC)
                lan_mac=$(mtd_get_mac_ascii uboot-env HW_LAN_MAC)