[PATCH] ath79: add support for Mikrotik SXT-R LTE

mk 378 keitz24 at gmail.com
Fri Mar 4 10:47:45 PST 2022 

This adds support for the Mikrotik SXT-R LTE device, which is an
outdoor router that hosts an LTE modem mini PCIe card for its WAN
connection.  The LTE antenna system claims a 9 dBi gain.

Hardware:
    - SoC: QCA9531
    - Flash: 16 MiB SPI NOR
    - RAM: 64 MiB DDR2
    - WiFi: None (no antenna is connected to the SoC WiFi system)
    - Ethernet: 2 x 10/100 Mb.
    - PoE: Passive or 802.3af in on port 1.  Unit must be powered by PoE.
           GPIO switchable passive PoE out on port 2.
    - Modem support: Mini PCIe slot wired only for USB2, no PCIe bus.
           Dual LTE antennas, two MicroSIM slots-- SIM card in use is
           selected by a GPIO output.  GPIO control of the 3.3 volt power
           to the slot, and hardware control pins 22 and 20.
    - Serial: There is a set of 10 test pads on board near the flash chip.
           Pin 6 is RX and pin 7 is Tx.  Tx GPIO pin is shared with the
           yellow LED on the eth1 socket.  This DTS sets it as serial
           output for OpenWrt.  The bootloader does not use serial.
    - LEDs: Power, LTE, 2x Ethernet Link, PoE out, 5x LTE signal level
    - Buttons: Reset, Mode

Installation:  Standard MikroTik-- RouterBOOT netboot the OpenWrt
    initramfs image, then flash the sysupgrade image from within OpenWrt.
    Under OpenWrt, the eth1 port (with PoE in) defaults to be LAN,
    and eth2 is WAN.

Signed-off-by: Mike Keitz <keitz24 at gmail>

diff --git a/target/linux/ath79/image/mikrotik.mk
b/target/linux/ath79/image/mikrotik.mk
index ff3604f2fa..ad29158156 100644
--- a/target/linux/ath79/image/mikrotik.mk
+++ b/target/linux/ath79/image/mikrotik.mk
@@ -64,6 +64,15 @@ define Device/mikrotik_routerboard-sxt-5nd-r2
 endef
 TARGET_DEVICES += mikrotik_routerboard-sxt-5nd-r2

+define Device/mikrotik_routerboard-sxtr
+  $(Device/mikrotik_nor)
+  SOC := qca9531
+  DEVICE_MODEL := RouterBOARD SXTR (SXT-LTE)
+  DEVICE_PACKAGES += kmod-usb2 kmod-gpio-nxp-74hc164
+  IMAGE_SIZE := 16256k
+endef
+TARGET_DEVICES += mikrotik_routerboard-sxtr
+
 define Device/mikrotik_routerboard-wap-g-5hact2hnd
   $(Device/mikrotik_nor)
   SOC := qca9556
diff --git a/target/linux/ath79/mikrotik/base-files/etc/board.d/01_leds
b/target/linux/ath79/mikrotik/base-files/etc/board.d/01_leds
index 25c0184568..1c91c57f38 100644
--- a/target/linux/ath79/mikrotik/base-files/etc/board.d/01_leds
+++ b/target/linux/ath79/mikrotik/base-files/etc/board.d/01_leds
@@ -32,6 +32,10 @@ mikrotik,routerboard-sxt-5nd-r2)
  ucidef_set_led_rssi "rssimediumhigh" "rssimediumhigh"
"green:rssimediumhigh" "wlan0" "60" "100"
  ucidef_set_led_rssi "rssihigh" "rssihigh" "green:rssihigh" "wlan0" "80" "100"
  ;;
+mikrotik,routerboard-sxtr)
+        ucidef_set_led_netdev "eth1" "eth1" "green:eth1" "eth1"
+        ucidef_set_led_switch "eth2" "eth2" "green:eth2" "switch0"
"4" "6" "link tx rx"
+        ;;
 esac

 board_config_flush
diff --git a/target/linux/ath79/mikrotik/base-files/etc/board.d/02_network
b/target/linux/ath79/mikrotik/base-files/etc/board.d/02_network
index 1a205e439c..90a018658b 100644
--- a/target/linux/ath79/mikrotik/base-files/etc/board.d/02_network
+++ b/target/linux/ath79/mikrotik/base-files/etc/board.d/02_network
@@ -22,6 +22,9 @@ ath79_setup_interfaces()
  mikrotik,routerboard-wapr-2nd)
  ucidef_set_interface_lan "eth0"
  ;;
+        mikrotik,routerboard-sxtr)
+                ucidef_set_interfaces_lan_wan "eth1" "eth0"
+                ;;
  *)
  ucidef_set_interfaces_lan_wan "eth0" "eth1"
  ;;
diff --git a/target/linux/ath79/dts/qca9531_mikrotik_routerboard-sxtr.dts
b/target/linux/ath79/dts/qca9531_mikrotik_routerboard-sxtr.dts
new file mode 100644
index 0000000000..acd8c3e4eb
--- /dev/null
+++ b/target/linux/ath79/dts/qca9531_mikrotik_routerboard-sxtr.dts
@@ -0,0 +1,192 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qca9533_mikrotik_routerboard-16m.dtsi"
+
+/ {
+ compatible = "mikrotik,routerboard-sxtr", "qca,qca9533";
+ model = "MikroTik RouterBOARD SXTR (SXT-LTE)";
+
+ aliases {
+ led-boot = &led_power;
+ led-failsafe = &led_power;
+ led-upgrade = &led_power;
+ led-running = &led_power;
+ };
+
+ leds {
+ compatible = "gpio-leds";
+ pinctrl-names = "default";
+
+ led_power: power {
+ label = "green:power";
+ gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+ };
+
+ lte {
+ label = "green:lte";
+ gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
+ };
+
+ eth1green {
+ label = "green:eth1";
+ gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
+ };
+
+ eth2green {
+ label = "green:eth2";
+ gpios = <&gpio 0 GPIO_ACTIVE_LOW>;
+ };
+
+ eth2yellow {
+ label = "yellow:eth2";
+ gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+ };
+
+ signal0 {
+ label = "green:rssilow";
+ gpios = <&gpio_ext 2 GPIO_ACTIVE_LOW>;
+ };
+
+ signal1 {
+ label = "green:rssimediumlow";
+ gpios = <&gpio_ext 3 GPIO_ACTIVE_LOW>;
+ };
+
+ signal2 {
+ label = "green:rssimedium";
+ gpios = <&gpio_ext 4 GPIO_ACTIVE_LOW>;
+ };
+
+ signal3 {
+ label = "green:rssimediumhigh";
+ gpios = <&gpio_ext 5 GPIO_ACTIVE_LOW>;
+ };
+
+ signal4 {
+ label = "green:rssihigh";
+ gpios = <&gpio_ext 6 GPIO_ACTIVE_LOW>;
+ };
+
+ };
+
+ gpio-export {
+ compatible = "gpio-export";
+
+ modem_power {
+ gpio-export,name = "modem_power";
+ gpio-export,output = <0>;
+ gpios = <&gpio 13 GPIO_ACTIVE_HIGH>;
+ };
+
+ poe_out {
+ gpio-export,name = "poe_out";
+ gpio-export,output = <0>;
+ gpios = <&gpio 14 GPIO_ACTIVE_HIGH>;
+ };
+
+ poe_status {
+ gpio-export,name = "poe_status";
+ gpio-export,input;
+ gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
+ };
+
+ sim_select {
+ gpio-export,name = "sim_select";
+ gpio-export,output = <0>;
+ gpios = <&gpio_ext 7 GPIO_ACTIVE_HIGH>;
+ };
+
+ modem_reset {
+ gpio-export,name = "modem_reset";
+ gpio-export,output = <0>;
+ gpios = <&gpio_ext 0 GPIO_ACTIVE_HIGH>;
+ };
+
+ modem_rfkill {
+ gpio-export,name = "modem_rfkill";
+ gpio-export,output = <0>;
+ gpios = <&gpio_ext 1 GPIO_ACTIVE_HIGH>;
+ };
+
+ };
+
+ keys {
+ compatible = "gpio-keys";
+
+ mode {
+ label = "MODE button";
+ linux,code = <KEY_RFKILL>;
+ gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
+ debounce-interval = <60>;
+ };
+ };
+};
+
+
+&spi {
+ status = "okay";
+ num-cs = <2>;
+ cs-gpios = <0>, <0>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&pmx_spi_ext>;
+
+ gpio_ext: gpio_ext at 1 {
+ compatible = "fairchild,74hc595";
+ reg = <1>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ registers-number = <1>;
+ spi-max-frequency = <10000000>;
+ };
+};
+
+&pinmux {
+                pmx_spi_ext: spi_ext {
+ pinctrl-single,bits = <0x08 0x0a000000 0xff000000>;  // Route
SPI_CS1 to GPIO 11 for 74HC595.
+                };
+
+ pmx_gpios: pmx_gpios {
+ pinctrl-single,bits =   <0x00 0x00000000 0x00ff00ff>,  // port green
leds normal GPIO
+ <0x08 0x00001600 0x0000ff00>,  // 10 is serial out -- will make eth1
yellow light blink
+ <0x10 0x00000000 0x0000ff00>;  // i7 normal mode for LED
+ };
+};
+
+&gpio {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pmx_gpios>;
+};
+
+&usb0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ hub_port: port at 1 {
+ reg = <1>;
+ #trigger-source-cells = <0>;
+ };
+};
+
+&usb_phy {
+ status = "okay";
+};
+
+&eth0 {
+ status = "okay";
+ mtd-mac-address = <&hard_config 0x10>;
+ mtd-mac-address-increment = <1>;
+ phy-handle = <&swphy0>;
+
+ gmac-config {
+ device = <&gmac>;
+ switch-phy-swap = <1>;
+ };
+};
+
+&eth1 {
+ status = "okay";
+ mtd-mac-address = <&hard_config 0x10>;
+};
+

More information about the openwrt-devel mailing list