ipq40xx: add support for Linksys MR9000

This pull request is based on
- the discussions in https://forum.openwrt.org/t/support-for-the-linksys-mr9000

Device Specs:
- Router is similar to EA8300 but with 512MB RAM and changed GPIOs
- IPQ4019
- Quad Core CPU
- 512 MB RAM
- 256 MB FLASH
- 4 LAN ports, 1 WAN port
- 1x2.4GHz (802.11n) and 2x5GHz (802.11c) wifi
- 3 LEDs (Red, blue, green) which are routed to one indicator at the top of the case
- 2 buttons (Reset, WPS)

Disassembling the device:
- There are 4 T10 screws at the bottom of the device which must be removed
- All 4 screws are located under the rubber feet

Serial interface:
- The serial interface is already populated on the device with a 5-pin header
- Pinout from front to back: 1:GND, 2: unknown, 3: RX, 4: TX, 5: VCC
- Settings: 115200, 8N1

MAC address layout:
- Same as on MR8300
  - MAC address is stored in the "devinfo" partition (entry "hw_mac_addr")
  - The MAC address on the label is identical with the one in the devinfo partition
  - The MAC address on the label is the WAN MAC address
  - LAN MAC address is the one from the label + 1
  - Wifi (2.4GHz) MAC is the one from the label + 2
  - Wifi (1st 5GHz) MAC is the one from the label + 3
  - Wifi (2nd 5GHz) MAC is the one from the label + 4

Migrating to OpenWrt requires multiple steps:
- Load and boot the initramfs image
- Adapt U-Boot settings to support bigger kernels
- Flash the sysupgrade image

Load and boot initramfs:
- Connect serial interface
- Set up a TFTP server on IP 192.168.1.254
- Copy openwrt-ipq40xx-generic-linksys_mr9000-initramfs-zImage.itb to TFTP server
- Rename file to C0A80101.img
- Boot up the device and stop in U-Boot
- Run the following U-Boot commands after a link has been established:
  tftp
  bootm
- Initramfs image is started now.

Adapt U-Boot settings to support bigger kernels:
- Run "fw_printenv" in the initramfs image  after booting
- There should be an entry kernsize=300000 which indicates the maximum size for the kernel is 3MB
- Execute "fw_setenv kernsize 500000" to increase the max kernel size to 5MB
- Check that the change are applied with "fw_printenv"

Flash the sysupgrade image:
- Default sysupgrade routine either with a initramfs image containing LuCI or via command line.

Revert back to OEM firmware:
- Flash the OEM firmware via sysupgrade
- Forced update is required

Signed-off-by: Karsten Rehn <rekados@posteo.de>
Signed-off-by: Roland Reinl <reinlroland+github@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22744
Signed-off-by: Robert Marko <robimarko@gmail.com>

package/boot/uboot-tools/uboot-envtools/files/ipq40xx

@@ -45,7 +45,8 @@ linksys,ea6350v3)
 	;;
 linksys,ea8300|\
 linksys,mr6350|\
-linksys,mr8300)
+linksys,mr8300|\
+linksys,mr9000)
 	ubootenv_add_uci_config "/dev/mtd7" "0x0" "0x40000" "0x20000"
 	;;
 linksys,whw01)

package/firmware/ipq-wifi/Makefile

@@ -56,6 +56,7 @@ ALLWIFIBOARDS:= \
 	linksys_mr6350 \
 	linksys_mr7350 \
 	linksys_mr7500 \
+	linksys_mr9000 \
 	linksys_mx2000 \
 	linksys_mx4200 \
 	linksys_mx5300 \
@@ -252,6 +253,7 @@ $(eval $(call generate-ipq-wifi-package,linksys_mr5500,Linksys MR5500))
 $(eval $(call generate-ipq-wifi-package,linksys_mr6350,Linksys MR6350))
 $(eval $(call generate-ipq-wifi-package,linksys_mr7350,Linksys MR7350))
 $(eval $(call generate-ipq-wifi-package,linksys_mr7500,Linksys MR7500))
+$(eval $(call generate-ipq-wifi-package,linksys_mr9000,Linksys MR9000))
 $(eval $(call generate-ipq-wifi-package,linksys_mx2000,Linksys MX2000))
 $(eval $(call generate-ipq-wifi-package,linksys_mx4200,Linksys MX4200))
 $(eval $(call generate-ipq-wifi-package,linksys_mx5300,Linksys MX5300))

target/linux/ipq40xx/base-files/etc/board.d/02_network

@@ -19,6 +19,7 @@ ipq40xx_setup_interfaces()
 	linksys,ea8300|\
 	linksys,mr6350|\
 	linksys,mr8300|\
+	linksys,mr9000|\
 	mikrotik,hap-ac2|\
 	mikrotik,hap-ac3|\
 	mikrotik,hap-ac3-lte6-kit|\

target/linux/ipq40xx/base-files/etc/init.d/bootcount

@@ -41,6 +41,7 @@ boot() {
 	linksys,ea8300|\
 	linksys,mr6350|\
 	linksys,mr8300|\
+	linksys,mr9000|\
 	linksys,whw01|\
 	linksys,whw03v2)
 		mtd resetbc s_env || true

target/linux/ipq40xx/base-files/lib/upgrade/linksys.sh

@@ -16,7 +16,7 @@ linksys_get_target_firmware() {
 			"${cur_boot_part}" "${mtd_ubi0}"
 	fi
 
-	# OEM U-Boot for EA6350v3, EA8300, MR6350 and MR8300; bootcmd=
+	# OEM U-Boot for EA6350v3, EA8300, MR6350, MR8300 and MR9000; bootcmd=
 	#  if test $auto_recovery = no;
 	#      then bootipq;
 	#  elif test $boot_part = 1;

target/linux/ipq40xx/base-files/lib/upgrade/platform.sh

@@ -181,6 +181,7 @@ platform_do_upgrade() {
 	linksys,ea8300|\
 	linksys,mr6350|\
 	linksys,mr8300|\
+	linksys,mr9000|\
 	linksys,whw01|\
 	linksys,whw03v2)
 		platform_do_upgrade_linksys "$1"

target/linux/ipq40xx/dts/qcom-ipq4019-mr9000.dts

@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include <dt-bindings/leds/common.h>
+
+#include "qcom-ipq4019-xx8300.dtsi"
+
+/ {
+	model = "Linksys MR9000";
+	compatible = "linksys,mr9000", "qcom,ipq4019";
+
+	aliases {
+		led-boot = &led_blue;
+		led-failsafe = &led_red;
+		led-running = &led_green;
+		led-upgrade = &led_blue;
+		serial0 = &blsp1_uart1;
+		label-mac-device = &swport5;
+	};
+
+	// Top panel LEDs, above Linksys logo
+	leds {
+		compatible = "gpio-leds";
+
+		led_red: red {
+			function = LED_FUNCTION_ALARM;
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&tlmm 47 GPIO_ACTIVE_HIGH>;
+			panic-indicator;
+		};
+
+		led_blue: blue {
+			function = LED_FUNCTION_STATUS;
+			color = <LED_COLOR_ID_BLUE>;
+			gpios = <&tlmm 46 GPIO_ACTIVE_LOW>;
+		};
+
+		led_green: green {
+			function = LED_FUNCTION_STATUS;
+			color = <LED_COLOR_ID_GREEN>;
+			gpios = <&tlmm 49 GPIO_ACTIVE_HIGH>;
+		};
+
+		// On back panel, above USB socket
+
+		led_usb: usb {
+			function = LED_FUNCTION_USB;
+			color = <LED_COLOR_ID_GREEN>;
+			gpios = <&tlmm 61 GPIO_ACTIVE_LOW>;
+			trigger-sources = <&usb3_port1>, <&usb3_port2>,
+					  <&usb2_port1>;
+			linux,default-trigger = "usbport";
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&tlmm 50 GPIO_ACTIVE_LOW>;
+		};
+
+		wps {
+			label = "wps";
+			linux,code = <KEY_WPS_BUTTON>;
+			gpios = <&tlmm 18 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&mdio {
+	status = "okay";
+	pinctrl-0 = <&mdio_pins>;
+	pinctrl-names = "default";
+	reset-gpios = <&tlmm 54 GPIO_ACTIVE_LOW>;
+	reset-delay-us = <2000>;
+	reset-post-delay-us = <5000>;
+};
+
+&tlmm {
+	status = "okay";
+	mdio_pins: mdio_pinmux {
+		mux_1 {
+			pins = "gpio6";
+			function = "mdio";
+			bias-pull-up;
+		};
+		mux_2 {
+			pins = "gpio7";
+			function = "mdc";
+			bias-pull-up;
+		};
+	};
+};
+
+&wifi0 {
+	status = "okay";
+	qcom,ath10k-calibration-variant = "linksys-mr9000";
+};
+
+&wifi1 {
+	status = "okay";
+	ieee80211-freq-limit = <5170000 5330000>;
+	qcom,ath10k-calibration-variant = "linksys-mr9000";
+};
+
+&wifi2 {
+	status = "okay";
+	ieee80211-freq-limit = <5490000 5835000>;
+	qcom,ath10k-calibration-variant = "linksys-mr9000";
+};

target/linux/ipq40xx/image/generic.mk

@@ -759,6 +759,24 @@ define Device/linksys_mr8300
 endef
 TARGET_DEVICES += linksys_mr8300
 
+define Device/linksys_mr9000
+	$(call Device/FitzImage)
+	$(call Device/kernel-size-6350-8300)
+	DEVICE_VENDOR := Linksys
+	DEVICE_MODEL := MR9000
+	SOC := qcom-ipq4019
+	KERNEL_SIZE := 5120k
+	IMAGE_SIZE := 84992k
+	NAND_SIZE := 256m
+	BLOCKSIZE := 128k
+	PAGESIZE := 2048
+	UBINIZE_OPTS := -E 5    # EOD marks to "hide" factory sig at EOF
+	IMAGES += factory.bin
+	IMAGE/factory.bin  := append-kernel | pad-to $$$$(KERNEL_SIZE) | append-ubi | linksys-image type=MR9000
+	DEVICE_PACKAGES := ath10k-firmware-qca9984-ct ipq-wifi-linksys_mr9000 kmod-usb-ledtrig-usbport
+endef
+TARGET_DEVICES += linksys_mr9000
+
 define Device/linksys_whw01
 	$(call Device/FitzImage)
 	DEVICE_VENDOR := Linksys