ath79: add support for Huawei AP5030DN

Huawei AP5030DN is a dual-band, dual-radio 802.11ac Wave 1 3x3 MIMO enterprise access point with two Gigabit Ethernet ports and PoE support.

Hardware highlights:
- CPU: QCA9550 SoC at 720MHz
- RAM: 256MB DDR2
- Flash: 32MB SPI-NOR
- Wi-Fi 2.4GHz: QCA9550-internal radio
- Wi-Fi 5GHz: QCA9880 PCIe WLAN SoC
- Ethernet 1: 10/100/1000 Mbps Ethernet through Broadcom B50612E PHY
- Ethernet 2: 10/100/1000 Mbps Ethernet through Marvell 88E1510 PHY
- PoE: input through Ethernet 1 port
- Standalone 12V/2A power input
- Serial console externally available through RJ45 port
- External watchdog: SGM706

Serial console:
  9600n8 (9600 baud, no stop bits, no parity, 8 data bits)

MAC addresses:
  Each device has 32 consecutive MAC addresses allocated by
  the vendor, which don't overlap between devices.
  This was confirmed with multiple devices with consecutive
  serial numbers.
  The MAC address range starts with the address on the label.
  To be able to distinguish between the interfaces,
  the following MAC address scheme is used:
    - eth0 = label MAC
    - eth1 = label MAC + 1
    - radio0 (Wi-Fi 5GHz) = label MAC + 2
    - radio1 (Wi-Fi 2.4GHz) = label MAC + 3

Installation:
0. Connect some sort of RJ45-to-USB adapter to "Console" port of the AP

1. Power up the AP

2. At prompt "Press f or F  to stop Auto-Boot in 3 seconds",
   do what they say.

3. Boot the OpenWrt initramfs from TFTP using hidden script "run ramboot".
   Replace IP address as needed:

   > setenv serverip 192.168.1.10
   > setenv ipaddr 192.168.1.1
   > setenv rambootfile openwrt-ath79-generic-huawei_ap5030dn-initramfs-kernel.bin
   > run ramboot

4. Optional but recommended as the factory firmware cannot be downloaded publicly:
   Back up contents of "firmware" partition using web interface or ssh:

   $ ssh [email protected] cat /dev/mtd11 > huawei_ap5030dn_fw_backup.bin

5. Run sysupgrade using sysupgrade image. OpenWrt
   shall boot from flash afterwards.

Return to factory firmware (using firmware upgrade package downloaded from non-public Huawei website):
1. Start a TFTP server in the directory where
   the firmware upgrade package is located

2. Boot to u-boot as described above

3. Install firmware upgrade package and format the config partitions:

   > update system FatAP5X30XN_SOMEVERSION.bin
   > format_fs

Return to factory firmware (from previously created backup):
1. Copy over the firmware partition backup to /tmp,
   for example using scp

2. Use sysupgrade with force to restore the backup:
   sysupgrade -F huawei_ap5030dn_fw_backup.bin

3. Boot AP to U-Boot as described above

Quirks and known issues:
- On initial power-up, the Huawei-modified bootloader suspends both ethernet PHYs (it sets the "Power Down" bit in the MII control register). Unfortunately, at the time of writing, the kernel driver for the B50612E/BCM54612E PHY behind eth0 doesn't have a resume callback defined which would clear this bit. This makes the PHY unusable since it remains suspended forever. This is why the kernel patches in this commit are required which add this callback and for completeness also a suspend callback.
- The stock firmware has a semi dual boot concept where the primary kernel uses a squashfs as root partition and the secondary kernel uses an initramfs. This dual boot concept is circumvented on purpose to gain more flash space and since the stock firmware's flash layout isn't compatible with mtdsplit.
- When OpenWrt is built from source, early printk has to be disabled in the kernel config. This is because the external watchdog's timeout of 1.6 seconds is so short that it kills the kernel when boot is slowed down a bit by early printk.

Signed-off-by: Marco von Rosenberg <[email protected]>

package/boot/uboot-envtools/files/ath79

@@ -126,6 +126,9 @@ domywifi,dw33d)
 glinet,gl-ar150)
 	ubootenv_add_uci_config "/dev/mtd1" "0x0" "0x8000" "0x10000"
 	;;
+huawei,ap5030dn)
+	ubootenv_add_uci_config "/dev/mtd3" "0x0" "0x20000" "0x20000"
+	;;
 netgear,wndr3700|\
 netgear,wndr3700-v2|\
 netgear,wndrmac-v1)

target/linux/ath79/dts/qca9550_huawei_ap5030dn.dts

@@ -0,0 +1,219 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qca955x.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	model = "Huawei AP5030DN";
+	compatible = "huawei,ap5030dn", "qca,qca9550", "qca,qca9558";
+
+	chosen {
+		bootargs = "console=ttyS0,9600n8";
+	};
+
+	aliases {
+		led-boot = &led_power_red;
+		led-failsafe = &led_power_red;
+		led-running = &led_power_green;
+		led-upgrade = &led_power_red;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power_green: power_green {
+			label = "green:power";
+			gpios = <&gpio 18 GPIO_ACTIVE_HIGH>;
+			default-state = "on";
+		};
+
+		led_power_red: power_red {
+			label = "red:power";
+			gpios = <&gpio 11 GPIO_ACTIVE_HIGH>;
+		};
+
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		restart {
+			label = "Restart button";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 21 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+	};
+
+	watchdog {
+		compatible = "linux,wdt-gpio";
+		gpios = <&gpio 15 GPIO_ACTIVE_HIGH>;
+		hw_algo = "toggle";
+		hw_margin_ms = <100>;
+		always-running;
+	};
+
+	virtual_flash {
+		compatible = "mtd-concat";
+		devices = <&fwconcat0 &fwconcat1>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "firmware";
+				reg = <0x0 0x1e00000>;
+				compatible = "openwrt,uimage", "denx,uimage";
+			};
+		};
+	};
+};
+
+&spi {
+	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-a";
+				reg = <0x0 0x80000>;
+				read-only;
+			};
+
+			partition@80000 {
+				label = "BootupA";
+				reg = <0x80000 0x20000>;
+			};
+
+			partition@a0000 {
+				label = "BootupB";
+				reg = <0xa0000 0x20000>;
+			};
+
+			partition@c0000 {
+				label = "u-boot-env";
+				reg = <0xc0000 0x20000>;
+				read-only;
+			};
+
+			partition@e0000 {
+				label = "BoardData";
+				reg = <0xe0000 0x20000>;
+				read-only;
+			};
+
+			// In the vendor layout, there are the "SysImageA" (12 MiB)
+			// and the "ConfigA" (3 MiB) partitions here.
+			fwconcat0: partition@100000 {
+				label = "fwconcat0";
+				reg = <0x100000 0xF00000>;
+			};
+
+			partition@1000000 {
+				label = "u-boot-b";
+				reg = <0x1000000 0x80000>;
+				read-only;
+			};
+
+			partition@1080000 {
+				label = "ResultA";
+				reg = <0x1080000 0x20000>;
+				read-only;
+			};
+
+			partition@10a0000 {
+				label = "ResultB";
+				reg = <0x10a0000 0x20000>;
+				read-only;
+			};
+
+			// In the vendor layout, there are the "SysImageB" (12 MiB)
+			// and the "ConfigB" (3 MiB) partitions here.
+			fwconcat1: partition@10c0000 {
+				label = "fwconcat1";
+				reg = <0x10c0000 0xF00000>;
+			};
+
+			art: partition@1fc0000 {
+				label = "art";
+				reg = <0x1fc0000 0x40000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&wmac {
+	status = "okay";
+
+	nvmem-cells = <&macaddr_art_2005b>, <&calibration_art_1000>;
+	nvmem-cell-names = "mac-address", "calibration";
+	mac-address-increment = <3>;
+};
+
+&pcie0 {
+	status = "okay";
+};
+
+&eth0 {
+	status = "okay";
+
+	nvmem-cells = <&macaddr_art_2005b>;
+	nvmem-cell-names = "mac-address";
+
+	pll-data = <0xa6000000 0x80000101 0x80001313>;
+	phy-handle = <&phy0>;
+};
+
+&eth1 {
+	status = "okay";
+
+	nvmem-cells = <&macaddr_art_2005b>;
+	nvmem-cell-names = "mac-address";
+	mac-address-increment = <1>;
+
+	pll-data = <0x03000101 0x00000101 0x00001313>;
+	phy-handle = <&phy1>;
+};
+
+&mdio0 {
+	status = "okay";
+
+	phy0: ethernet-phy@18 {
+		reg = <0x18>;
+	};
+};
+
+&mdio1 {
+	status = "okay";
+
+	phy1: ethernet-phy@1 {
+		reg = <1>;
+	};
+};
+
+&art {
+	compatible = "nvmem-cells";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	calibration_art_1000: calibration@1000 {
+		reg = <0x1000 0x440>;
+	};
+
+	macaddr_art_2005b: macaddr@2005b {
+		reg = <0x2005b 0x6>;
+	};
+};

target/linux/ath79/generic/base-files/etc/board.d/02_network

@@ -144,6 +144,7 @@ ath79_setup_interfaces()
 	engenius,enstationac-v1|\
 	engenius,ews511ap|\
 	engenius,ews660ap|\
+	huawei,ap5030dn|\
 	ocedo,ursus|\
 	ruckus,zf7363|\
 	ruckus,zf7372|\
@@ -722,6 +723,9 @@ ath79_setup_macs()
 	hak5,packet-squirrel)
 		label_mac=$(mtd_get_mac_binary u-boot 0x1fc00)
 		;;
+	huawei,ap5030dn)
+		label_mac=$(mtd_get_mac_binary art 0x2005b)
+		;;
 	iodata,etg3-r)
 		lan_mac=$(mtd_get_mac_ascii u-boot-env ethaddr)
 		wan_mac=$(macaddr_add "$lan_mac" -1)

target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/11-ath10k-caldata

@@ -86,6 +86,10 @@ case "$FIRMWARE" in
 		caldata_extract "art" 0x5000 0x844
 		ath10k_patch_mac $(macaddr_add $(mtd_get_mac_binary art 0x0) 1)
 		;;
+	huawei,ap5030dn)
+		caldata_extract "art" 0x5000 0x844
+		ath10k_patch_mac $(macaddr_add $(mtd_get_mac_binary art 0x2005b) 2)
+		;;
 	iodata,wn-ac1167dgr|\
 	iodata,wn-ac1600dgr2|\
 	sitecom,wlr-7100|\

target/linux/ath79/generic/base-files/lib/upgrade/platform.sh

@@ -67,6 +67,13 @@ platform_do_upgrade() {
 		ROOTFS_FILE="root.squashfs"
 		platform_do_upgrade_failsafe_datachk "$1"
 		;;
+	huawei,ap5030dn)
+		# Write beginning address of "firmware" partition as KernelA address and KernelB address, each to BootupA & BootupB
+		echo "Setting Huawei-custom kernel addresses..."
+		echo -n -e "\x9e\x10\x00\x00\x9e\x10\x00\x00" | dd of=/dev/mtdblock1 bs=1 seek=$((0x254)) conv=notrunc
+		echo -n -e "\x9e\x10\x00\x00\x9e\x10\x00\x00" | dd of=/dev/mtdblock2 bs=1 seek=$((0x254)) conv=notrunc
+		default_do_upgrade "$1"
+		;;
 	jjplus,ja76pf2)
 		platform_do_upgrade_redboot_fis "$1" linux
 		;;

target/linux/ath79/image/generic.mk

@@ -273,6 +273,19 @@ define Device/airtight_c-75
 endef
 TARGET_DEVICES += airtight_c-75
 
+define Device/huawei_ap5030dn
+  SOC := qca9550
+  DEVICE_VENDOR := Huawei
+  DEVICE_MODEL := AP5030DN
+  DEVICE_PACKAGES := ath10k-firmware-qca988x-ct kmod-ath10k-ct
+  ROOTFS_MIN_SIZE := 12240k
+  IMAGE_SIZE := 30720k
+  IMAGES += kernel.bin squashfs.bin
+  IMAGE/kernel.bin := | append-kernel
+  IMAGE/squashfs.bin := append-rootfs | pad-rootfs | pad-to $$$$(ROOTFS_MIN_SIZE) | pad-to $$$$(BLOCKSIZE)
+endef
+TARGET_DEVICES += huawei_ap5030dn
+
 define Device/alfa-network_ap121f
   SOC := ar9331
   DEVICE_VENDOR := ALFA Network

target/linux/ath79/patches-5.15/731-net-phy-bcm54612e-add-suspend-resume.patch

@@ -0,0 +1,24 @@
+From: Marco von Rosenberg <[email protected]>
+Date: Thu, 5 Oct 2023 23:00:42 +0200
+Subject: net: phy: broadcom: Wire suspend/resume for BCM54612E
+
+The BCM54612E ethernet PHY supports IDDQ-SR.
+Therefore wire-up the suspend and resume callbacks
+to point to bcm54xx_suspend() and bcm54xx_resume().
+
+Signed-off-by: Marco von Rosenberg <[email protected]>
+---
+ drivers/net/phy/broadcom.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/drivers/net/phy/broadcom.c
++++ b/drivers/net/phy/broadcom.c
+@@ -795,6 +795,8 @@ static struct phy_driver broadcom_driver
+ 	.config_init	= bcm54xx_config_init,
+ 	.config_intr	= bcm_phy_config_intr,
+ 	.handle_interrupt = bcm_phy_handle_interrupt,
++	.suspend	= genphy_suspend,
++	.resume		= bcm54xx_resume,
+ }, {
+ 	.phy_id		= PHY_ID_BCM54616S,
+ 	.phy_id_mask	= 0xfffffff0,

target/linux/ath79/patches-6.1/731-net-phy-bcm54612e-add-suspend-resume.patch

@@ -0,0 +1,27 @@
+From 380b50ae3a04222334a3779b3787eba844b1177f Mon Sep 17 00:00:00 2001
+From: Marco von Rosenberg <[email protected]>
+Date: Thu, 16 Nov 2023 20:32:31 +0100
+Subject: net: phy: broadcom: Wire suspend/resume for BCM54612E
+
+The BCM54612E ethernet PHY supports IDDQ-SR.
+Therefore wire-up the suspend and resume callbacks
+to point to bcm54xx_suspend() and bcm54xx_resume().
+
+Signed-off-by: Marco von Rosenberg <[email protected]>
+Acked-by: Florian Fainelli <[email protected]>
+Signed-off-by: David S. Miller <[email protected]>
+---
+ drivers/net/phy/broadcom.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/drivers/net/phy/broadcom.c
++++ b/drivers/net/phy/broadcom.c
+@@ -941,6 +941,8 @@ static struct phy_driver broadcom_driver
+ 	.config_intr	= bcm_phy_config_intr,
+ 	.handle_interrupt = bcm_phy_handle_interrupt,
+ 	.link_change_notify	= bcm54xx_link_change_notify,
++	.suspend	= bcm54xx_suspend,
++	.resume		= bcm54xx_resume,
+ }, {
+ 	.phy_id		= PHY_ID_BCM54616S,
+ 	.phy_id_mask	= 0xfffffff0,