ipq806x: add support for OpenMesh A42

* QCA IPQ401x
* 256 MB of RAM
* 32 MB of SPI NOR flash (s25fl256s1)
  - 2x 15 MB available; but one of the 15 MB regions is the recovery image
* 2T2R 2.4 GHz
  - QCA4019 hw1.0 (SoC)
  - requires special BDF in QCA4019/hw1.0/board-2.bin with
    bus=ahb,bmi-chip-id=0,bmi-board-id=16,variant=OM-A42
* 2T2R 5 GHz
  - QCA4019 hw1.0 (SoC)
  - requires special BDF in QCA4019/hw1.0/board-2.bin with
    bus=ahb,bmi-chip-id=0,bmi-board-id=17,variant=OM-A42
* multi-color LED (controlled via red/green/blue GPIOs)
* 1x button (reset; kmod-input-gpio-keys compatible)
* external watchdog
  - triggered GPIO
* 1x USB (xHCI)
* TTL pins are on board (arrow points to VCC, then follows: GND, TX, RX)
* 2x gigabit ethernet
* powered only via POE
  - 802.3af POE on Ethernet 1
  - 18-24v passive POE (mode B) on Ethernet 2

The tool ap51-flash (https://github.com/ap51-flash/ap51-flash) should be
used to transfer the factory image to the u-boot when the device boots up.

Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>

7 files changed, 388 insertions, 1 deletions

diff --git a/target/linux/ipq806x/base-files/etc/board.d/02_network b/target/linux/ipq806x/base-files/etc/board.d/02_network
index 74a38eece6..7d1d2ccc3c 100755
--- a/target/linux/ipq806x/base-files/etc/board.d/02_network
+++ b/target/linux/ipq806x/base-files/etc/board.d/02_network
@@ -33,6 +33,9 @@ tplink,vr2600v)
 	ucidef_add_switch "switch0" \
 		"1:lan" "2:lan" "3:lan" "4:lan" "6@eth1" "5:wan" "0@eth0"
 	;;
+openmesh,a42)
+	ucidef_set_interfaces_lan_wan "eth1" "eth0"
+	;;
 qcom,ipq8064-db149)
 	ucidef_set_interface_lan "eth1 eth2 eth3"
 	ucidef_add_switch "switch0" \
diff --git a/target/linux/ipq806x/base-files/etc/hotplug.d/firmware/11-ath10k-caldata b/target/linux/ipq806x/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
index 4aaa92305b..61b7403160 100644
--- a/target/linux/ipq806x/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
+++ b/target/linux/ipq806x/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
@@ -50,6 +50,9 @@ case "$FIRMWARE" in
 	avm,fritzbox-4040)
 		/usr/bin/fritz_cal_extract -i 1 -s 0x400 -e 0x207 -l 12064 -o /lib/firmware/$FIRMWARE $(find_mtd_chardev "urlader_config")
 		;;
+	openmesh,a42)
+		ath10kcal_extract "0:ART" 4096 12064
+		;;
 	qcom,ap-dk01.1-c1)
 		ath10kcal_extract "ART" 4096 12064
 		;;
@@ -60,6 +63,9 @@ case "$FIRMWARE" in
 	avm,fritzbox-4040)
 		/usr/bin/fritz_cal_extract -i 1 -s 0x400 -e 0x208 -l 12064 -o /lib/firmware/$FIRMWARE $(find_mtd_chardev "urlader_config")
 		;;
+	openmesh,a42)
+		ath10kcal_extract "0:ART" 20480 12064
+		;;
 	qcom,ap-dk01.1-c1)
 		ath10kcal_extract "ART" 20480 12064
 		;;
diff --git a/target/linux/ipq806x/base-files/lib/upgrade/openmesh.sh b/target/linux/ipq806x/base-files/lib/upgrade/openmesh.sh
new file mode 100644
index 0000000000..a2c79d9e44
--- /dev/null
+++ b/target/linux/ipq806x/base-files/lib/upgrade/openmesh.sh
@@ -0,0 +1,110 @@
+# The U-Boot loader of the OpenMesh devices requires image sizes and
+# checksums to be provided in the U-Boot environment.
+# The OpenMesh devices come with 2 main partitions - while one is active
+# sysupgrade will flash the other. The boot order is changed to boot the
+# newly flashed partition. If the new partition can't be booted due to
+# upgrade failures the previously used partition is loaded.
+
+platform_do_upgrade_openmesh() {
+	local tar_file="$1"
+	local restore_backup
+	local primary_kernel_mtd
+
+	local setenv_script="/tmp/fw_env_upgrade"
+
+	local kernel_mtd="$(find_mtd_index $PART_NAME)"
+	local kernel_offset="$(cat /sys/class/mtd/mtd${kernel_mtd}/offset)"
+	local total_size="$(cat /sys/class/mtd/mtd${kernel_mtd}/size)"
+
+	# detect to which flash region the new image is written to.
+	#
+	# 1. check what is the mtd index for the first flash region on this
+	#    device
+	# 2. check if the target partition ("inactive") has the mtd index of
+	#    the first flash region
+	#
+	#    - when it is: the new bootseq will be 1,2 and the first region is
+	#      modified
+	#    - when it isnt: bootseq will be 2,1 and the second region is
+	#      modified
+	#
+	# The detection has to be done via the hardcoded mtd partition because
+	# the current boot might be done with the fallback region. Let us
+	# assume that the current bootseq is 1,2. The bootloader detected that
+	# the image in flash region 1 is corrupt and thus switches to flash
+	# region 2. The bootseq in the u-boot-env is now still the same and
+	# the sysupgrade code can now only rely on the actual mtd indexes and
+	# not the bootseq variable to detect the currently booted flash
+	# region/image.
+	#
+	# In the above example, an implementation which uses bootseq ("1,2") to
+	# detect the currently booted image would assume that region 1 is booted
+	# and then overwrite the variables for the wrong flash region (aka the
+	# one which isn't modified). This could result in a device which doesn't
+	# boot anymore to Linux until it was reflashed with ap51-flash.
+	local next_boot_part="1"
+	case "$(board_name)" in
+	openmesh,a42)
+		primary_kernel_mtd=8
+		;;
+	*)
+		echo "failed to detect primary kernel mtd partition for board"
+		return 1
+		;;
+	esac
+	[ "$kernel_mtd" = "$primary_kernel_mtd" ] || next_boot_part="2"
+
+	local board_dir=$(tar tf $tar_file | grep -m 1 '^sysupgrade-.*/$')
+	board_dir=${board_dir%/}
+
+	local kernel_length=$(tar xf $tar_file ${board_dir}/kernel -O | wc -c)
+	local rootfs_length=$(tar xf $tar_file ${board_dir}/root -O | wc -c)
+	# rootfs without EOF marker
+	rootfs_length=$((rootfs_length-4))
+
+	local kernel_md5=$(tar xf $tar_file ${board_dir}/kernel -O | md5sum); kernel_md5="${kernel_md5%% *}"
+	# md5 checksum of rootfs with EOF marker
+	local rootfs_md5=$(tar xf $tar_file ${board_dir}/root -O | dd bs=1 count=$rootfs_length | md5sum); rootfs_md5="${rootfs_md5%% *}"
+
+	#
+	# add tar support to get_image() to use default_do_upgrade() instead?
+	#
+
+	# take care of restoring a saved config
+	[ "$SAVE_CONFIG" -eq 1 ] && restore_backup="${MTD_CONFIG_ARGS} -j ${CONF_TAR}"
+
+	# write concatinated kernel + rootfs to flash
+	tar xf $tar_file ${board_dir}/kernel ${board_dir}/root -O | \
+		mtd $restore_backup write - $PART_NAME
+
+	# prepare new u-boot env
+	if [ "$next_boot_part" = "1" ]; then
+		echo "bootseq 1,2" > $setenv_script
+	else
+		echo "bootseq 2,1" > $setenv_script
+	fi
+
+	printf "kernel_size_%i 0x%08x\n" $next_boot_part $kernel_length >> $setenv_script
+	printf "vmlinux_start_addr 0x%08x\n" ${kernel_offset} >> $setenv_script
+	printf "vmlinux_size 0x%08x\n" ${kernel_length} >> $setenv_script
+	printf "vmlinux_checksum %s\n" ${kernel_md5} >> $setenv_script
+
+	printf "rootfs_size_%i 0x%08x\n" $next_boot_part $((total_size-kernel_length)) >> $setenv_script
+	printf "rootfs_start_addr 0x%08x\n" $((kernel_offset+kernel_length)) >> $setenv_script
+	printf "rootfs_size 0x%08x\n" ${rootfs_length} >> $setenv_script
+	printf "rootfs_checksum %s\n" ${rootfs_md5} >> $setenv_script
+
+	# store u-boot env changes
+	fw_setenv -s $setenv_script || {
+		echo "failed to update U-Boot environment"
+		return 1
+	}
+}
+
+# create /var/lock for the lock "fw_setenv.lock" of fw_setenv
+# the rest is copied using ipq806x's RAMFS_COPY_BIN and RAMFS_COPY_DATA
+platform_add_ramfs_ubootenv()
+{
+        mkdir -p $RAM_ROOT/var/lock
+}
+append sysupgrade_pre_upgrade platform_add_ramfs_ubootenv
diff --git a/target/linux/ipq806x/base-files/lib/upgrade/platform.sh b/target/linux/ipq806x/base-files/lib/upgrade/platform.sh
index f71ee37d99..5561dd538c 100644
--- a/target/linux/ipq806x/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ipq806x/base-files/lib/upgrade/platform.sh
@@ -22,6 +22,10 @@ platform_do_upgrade() {
 	zyxel,nbg6817)
 		nand_do_upgrade "$ARGV"
 		;;
+	openmesh,a42)
+		PART_NAME="inactive"
+		platform_do_upgrade_openmesh "$ARGV"
+		;;
 	tplink,c2600)
 		PART_NAME="os-image:rootfs"
 		MTD_CONFIG_ARGS="-s 0x200000"
diff --git a/target/linux/ipq806x/files-4.9/arch/arm/boot/dts/qcom-ipq4019-a42.dts b/target/linux/ipq806x/files-4.9/arch/arm/boot/dts/qcom-ipq4019-a42.dts
new file mode 100644
index 0000000000..887be993e8
--- /dev/null
+++ b/target/linux/ipq806x/files-4.9/arch/arm/boot/dts/qcom-ipq4019-a42.dts
@@ -0,0 +1,244 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017, Sven Eckelmann <sven.eckelmann@openmesh.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "qcom-ipq4019.dtsi"
+#include "qcom-ipq4019-bus.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/soc/qcom,tcsr.h>
+
+/ {
+	model = "OpenMesh A42";
+	compatible = "openmesh,a42", "qcom,ipq4019";
+
+	reserved-memory {
+		#address-cells = <0x1>;
+		#size-cells = <0x1>;
+		ranges;
+
+		rsvd1@87000000 {
+			reg = <0x87000000 0x500000>;
+			no-map;
+		};
+
+		wifi_dump@87500000 {
+			reg = <0x87500000 0x600000>;
+			no-map;
+		};
+
+		rsvd2@87B00000 {
+			reg = <0x87b00000 0x500000>;
+			no-map;
+		};
+	};
+
+	soc {
+		tcsr@194b000 {
+			/* select hostmode */
+			compatible = "qcom,tcsr";
+			reg = <0x194b000 0x100>;
+			qcom,usb-hsphy-mode-select = <TCSR_USB_HSPHY_HOST_MODE>;
+			status = "ok";
+		};
+
+		ess_tcsr@1953000 {
+			compatible = "qcom,tcsr";
+			reg = <0x1953000 0x1000>;
+			qcom,ess-interface-select = <TCSR_ESS_PSGMII>;
+		};
+
+		tcsr@1949000 {
+			compatible = "qcom,tcsr";
+			reg = <0x1949000 0x100>;
+			qcom,wifi_glb_cfg = <TCSR_WIFI_GLB_CFG>;
+		};
+
+		tcsr@1957000 {
+			compatible = "qcom,tcsr";
+			reg = <0x1957000 0x100>;
+			qcom,wifi_noc_memtype_m0_m2 = <TCSR_WIFI_NOC_MEMTYPE_M0_M2>;
+		};
+
+		pinctrl@1000000 {
+			serial_pins: serial_pinmux {
+				mux {
+					pins = "gpio60", "gpio61";
+					function = "blsp_uart0";
+					bias-disable;
+				};
+			};
+
+			spi_0_pins: spi_0_pinmux {
+				pinmux {
+					function = "blsp_spi0";
+					pins = "gpio55", "gpio56", "gpio57";
+				};
+				pinmux_cs {
+					function = "gpio";
+					pins = "gpio54";
+				};
+				pinconf {
+					pins = "gpio55", "gpio56", "gpio57";
+					drive-strength = <12>;
+					bias-disable;
+				};
+				pinconf_cs {
+					pins = "gpio54";
+					drive-strength = <2>;
+					bias-disable;
+					output-high;
+				};
+			};
+		};
+
+		blsp_dma: dma@7884000 {
+			status = "ok";
+		};
+
+		spi_0: spi@78b5000 {
+			pinctrl-0 = <&spi_0_pins>;
+			pinctrl-names = "default";
+			status = "ok";
+			cs-gpios = <&tlmm 54 0>;
+
+			m25p80@0 {
+				#address-cells = <1>;
+				#size-cells = <1>;
+				compatible = "jedec,spi-nor";
+				reg = <0>;
+				spi-max-frequency = <24000000>;
+
+				/* partitions are passed via bootloader */
+			};
+		};
+
+		serial@78af000 {
+			pinctrl-0 = <&serial_pins>;
+			pinctrl-names = "default";
+			status = "ok";
+		};
+
+		cryptobam: dma@8e04000 {
+			status = "ok";
+		};
+
+		crypto@8e3a000 {
+			status = "ok";
+		};
+
+		watchdog@b017000 {
+			status = "ok";
+		};
+
+		usb2_hs_phy: hsphy@a8000 {
+			status = "ok";
+		};
+
+		usb2: usb2@60f8800 {
+			status = "ok";
+		};
+
+		mdio@90000 {
+			status = "okay";
+		};
+
+		ess-switch@c000000 {
+			status = "okay";
+		};
+
+		ess-psgmii@98000 {
+			status = "okay";
+		};
+
+		edma@c080000 {
+			status = "okay";
+		};
+
+		wifi@a000000 {
+			status = "okay";
+			qcom,ath10k-calibration-variant = "OM-A42";
+		};
+
+		wifi@a800000 {
+			status = "okay";
+			qcom,ath10k-calibration-variant = "OM-A42";
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&tlmm 59 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	aliases {
+		led-boot = &power;
+		led-failsafe = &power;
+		led-running = &power;
+		led-upgrade = &power;
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		red {
+			label = "a42:red:status";
+			gpios = <&tlmm 0 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "default-off";
+		};
+
+		power: green {
+			label = "a42:green:status";
+			gpios = <&tlmm 1 GPIO_ACTIVE_HIGH>;
+		};
+
+		blue {
+			label = "a42:blue:status";
+			gpios = <&tlmm 2 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "default-off";
+		};
+	};
+
+	watchdog {
+		compatible = "linux,wdt-gpio";
+		gpios = <&tlmm 5 GPIO_ACTIVE_LOW>;
+		hw_algo = "toggle";
+		/* hw_margin_ms is actually 300s but driver limits it to 60s */
+		hw_margin_ms = <60000>;
+		always-running;
+	};
+};
+
+&gmac0 {
+	qcom,phy_mdio_addr = <4>;
+	qcom,poll_required = <1>;
+	qcom,forced_speed = <1000>;
+	qcom,forced_duplex = <1>;
+	vlan_tag = <2 0x20>;
+};
+
+&gmac1 {
+	qcom,phy_mdio_addr = <3>;
+	qcom,poll_required = <1>;
+	qcom,forced_speed = <1000>;
+	qcom,forced_duplex = <1>;
+	vlan_tag = <1 0x10>;
+};
diff --git a/target/linux/ipq806x/image/Makefile b/target/linux/ipq806x/image/Makefile
index e8182e858f..708150521e 100644
--- a/target/linux/ipq806x/image/Makefile
+++ b/target/linux/ipq806x/image/Makefile
@@ -192,6 +192,23 @@ define Device/netgear_r7800
 endef
 TARGET_DEVICES += netgear_r7800
 
+define Device/openmesh_a42
+	$(call Device/FitImageLzma)
+	FILESYSTEMS := squashfs
+	DEVICE_DTS := qcom-ipq4019-a42
+	KERNEL_LOADADDR := 0x80208000
+	BLOCKSIZE := 64k
+	SUPPORTED_DEVICES := openmesh,a42
+	DEVICE_TITLE := OpenMesh A42
+	KERNEL = kernel-bin | lzma | fit lzma $$(DTS_DIR)/$$(DEVICE_DTS).dtb | pad-to $$(BLOCKSIZE)
+	IMAGE_SIZE := 15616k
+	IMAGES = factory.bin sysupgrade.bin
+	IMAGE/factory.bin/squashfs := append-rootfs | pad-rootfs | openmesh-image ce_type=A42
+	IMAGE/sysupgrade.bin/squashfs := append-rootfs | pad-rootfs | sysupgrade-tar rootfs=$$$$@ | append-metadata
+	DEVICE_PACKAGES := ath10k-firmware-qca4019 uboot-envtools ipq-wifi-openmesh_a42
+endef
+TARGET_DEVICES += openmesh_a42
+
 define Device/qcom_ap-dk01.1-c1
 	PROFILES += $$(DEVICE_NAME)
 	DEVICE_TITLE := QCA AP-DK01.1-C1
diff --git a/target/linux/ipq806x/patches-4.9/0069-arm-boot-add-dts-files.patch b/target/linux/ipq806x/patches-4.9/0069-arm-boot-add-dts-files.patch
index a6c66d703c..faabc24002 100644
--- a/target/linux/ipq806x/patches-4.9/0069-arm-boot-add-dts-files.patch
+++ b/target/linux/ipq806x/patches-4.9/0069-arm-boot-add-dts-files.patch
@@ -10,8 +10,11 @@ Signed-off-by: John Crispin <john@phrozen.org>
 
 --- a/arch/arm/boot/dts/Makefile
 +++ b/arch/arm/boot/dts/Makefile
-@@ -618,7 +618,16 @@ dtb-$(CONFIG_ARCH_QCOM) += \
+@@ -616,9 +616,19 @@ dtb-$(CONFIG_ARCH_QCOM) += \
+ 	qcom-apq8074-dragonboard.dtb \
+ 	qcom-apq8084-ifc6540.dtb \
  	qcom-apq8084-mtp.dtb \
++ 	qcom-ipq4019-a42.dtb \
  	qcom-ipq4019-ap.dk01.1-c1.dtb \
  	qcom-ipq4019-ap.dk04.1-c1.dtb \
 +	qcom-ipq4019-fritz4040.dtb \