board: add support for Schneider HMIBSC board

Support for Schneider Electric HMIBSC. Features:
- Qualcomm Snapdragon 410C SoC - APQ8016 (4xCortex A53, Adreno 306)
- 2GiB RAM
- 64GiB eMMC, SD slot
- WiFi and Bluetooth
- 2x Host, 1x Device USB port
- HDMI
- Discrete TPM2 chip over SPI

Features enabled in U-Boot:
- RAUC updates
- Environment protection
- USB based ethernet adaptors

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>

board/schneider/hmibsc/MAINTAINERS

@@ -0,0 +1,6 @@
+HMIBSC BOARD
+M:	Sumit Garg <sumit.garg@linaro.org>
+S:	Maintained
+F:	board/schneider/hmibsc/
+F:	include/configs/hmibsc.h
+F:	configs/hmibsc_defconfig

board/schneider/hmibsc/hmibsc.env

@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+loadaddr=0x90000000
+bootcmd=
+	echo "Booting RAUC A/B system";
+	setenv devtype mmc; setenv devnum 0;
+	test -n "${BOOT_ORDER}" || setenv BOOT_ORDER "A B";
+	test -n "${BOOT_A_LEFT}" || setenv BOOT_A_LEFT 3;
+	test -n "${BOOT_B_LEFT}" || setenv BOOT_B_LEFT 3;
+	setenv raucslot;
+	for BOOT_SLOT in "${BOOT_ORDER}"; do
+		if test "x${raucslot}" != "x"; then
+			echo "skip remaining slots...";
+		elif test "x${BOOT_SLOT}" = "xA"; then
+			if test ${BOOT_A_LEFT} -gt 0; then
+				setexpr BOOT_A_LEFT ${BOOT_A_LEFT} - 1;
+				echo "Found valid RAUC slot A";
+				setenv raucslot "rauc.slot=A";
+				setenv raucpart A; setenv distro_bootpart 6;
+			fi;
+		elif test "x${BOOT_SLOT}" = "xB"; then
+			if test ${BOOT_B_LEFT} -gt 0; then
+				setexpr BOOT_B_LEFT ${BOOT_B_LEFT} - 1;
+				echo "Found valid RAUC slot B";
+				setenv raucslot "rauc.slot=B";
+				setenv raucpart B; setenv distro_bootpart 7;
+			fi;
+		fi;
+	done;
+	if test -n "${raucslot}"; then
+		setenv bootargs console=ttyMSM1 root=PARTLABEL=rootfs_${raucpart} rw rootwait ${raucslot};
+		saveenv;
+	else
+		echo "No valid RAUC slot found. Resetting tries to 3";
+		setenv BOOT_A_LEFT 3;
+		setenv BOOT_B_LEFT 3;
+		saveenv;
+		reset;
+	fi;
+	load ${devtype} ${devnum}:${distro_bootpart} ${loadaddr} /boot/fitImage && bootm;

configs/hmibsc_defconfig

@@ -0,0 +1,87 @@
+CONFIG_ARM=y
+CONFIG_SYS_VENDOR="schneider"
+CONFIG_SYS_BOARD="hmibsc"
+CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK=y
+CONFIG_ARCH_SNAPDRAGON=y
+CONFIG_TEXT_BASE=0x8f600000
+CONFIG_SYS_MALLOC_LEN=0x802000
+CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x8007fff0
+CONFIG_ENV_SIZE=0x2000
+CONFIG_ENV_OFFSET=0x0
+CONFIG_DEFAULT_DEVICE_TREE="apq8016-schneider-hmibsc"
+# CONFIG_OF_UPSTREAM is not set
+CONFIG_OF_LIBFDT_OVERLAY=y
+CONFIG_IDENT_STRING="\nSchneider Electric-HMIBSC"
+CONFIG_SYS_LOAD_ADDR=0x80080000
+CONFIG_REMAKE_ELF=y
+# CONFIG_ANDROID_BOOT_IMAGE is not set
+CONFIG_FIT=y
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_CBSIZE=2048
+# CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_SYS_PROMPT="hmibsc => "
+CONFIG_SYS_MAXARGS=64
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_FS_GENERIC=y
+# CONFIG_CMD_IMI is not set
+CONFIG_CMD_MD5SUM=y
+CONFIG_CMD_MEMINFO=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_GPT=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_PART=y
+CONFIG_CMD_USB=y
+CONFIG_BOOTP_BOOTFILESIZE=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_TIMER=y
+CONFIG_CMD_ENV_FLAGS=y
+CONFIG_CMD_ENV_EXISTS=y
+CONFIG_CMD_NVEDIT_INFO=y
+CONFIG_ENV_WRITEABLE_LIST=y
+CONFIG_ENV_ACCESS_IGNORE_FORCE=y
+CONFIG_ENV_IS_IN_MMC=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_SYS_MMC_ENV_PART=2
+CONFIG_BUTTON_QCOM_PMIC=y
+CONFIG_CLK=y
+CONFIG_CLK_QCOM_APQ8016=y
+CONFIG_USB_FUNCTION_FASTBOOT=y
+CONFIG_FASTBOOT_BUF_ADDR=0x91000000
+CONFIG_FASTBOOT_FLASH=y
+CONFIG_FASTBOOT_FLASH_MMC_DEV=0
+CONFIG_MSM_GPIO=y
+CONFIG_QCOM_PMIC_GPIO=y
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_MSM=y
+CONFIG_PHY=y
+CONFIG_PINCTRL=y
+CONFIG_PINCONF=y
+CONFIG_PINCTRL_QCOM_APQ8016=y
+CONFIG_DM_PMIC=y
+CONFIG_PMIC_QCOM=y
+CONFIG_MSM_SERIAL=y
+CONFIG_SPMI_MSM=y
+CONFIG_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_MSM=y
+CONFIG_USB_ULPI_VIEWPORT=y
+CONFIG_USB_ULPI=y
+CONFIG_USB_HOST_ETHER=y
+CONFIG_USB_ETHER_ASIX=y
+CONFIG_USB_ETHER_ASIX88179=y
+CONFIG_USB_ETHER_MCS7830=y
+CONFIG_USB_ETHER_SMSC95XX=y
+CONFIG_PHYLIB=y
+CONFIG_USB_ETHER_LAN75XX=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_VENDOR_NUM=0x18d1
+CONFIG_USB_GADGET_PRODUCT_NUM=0xd00d
+CONFIG_CI_UDC=y

doc/board/index.rst

@@ -42,6 +42,7 @@ Board-specific doc
    renesas/index
    rockchip/index
    samsung/index
+   schneider/index
    sielaff/index
    siemens/index
    sifive/index

doc/board/schneider/hmibsc.rst

@@ -0,0 +1,45 @@
+.. SPDX-License-Identifier: GPL-2.0+
+.. sectionauthor:: Sumit Garg <sumit.garg@linaro.org>
+
+HMIBSC
+======
+
+The HMIBSC is an IIoT Edge Box Core board based on the Qualcomm APQ8016E SoC.
+More information can be found on the `SE product page`_.
+
+U-Boot can be used as a replacement for Qualcomm's original Android bootloader
+(a fork of Little Kernel/LK). Like LK, it is installed directly into the ``aboot``
+partition. Note that the U-Boot port used to be loaded as an Android boot image
+through LK. This is no longer the case, now U-Boot can replace LK entirely.
+
+.. _SE product page: https://www.se.com/us/en/product/HMIBSCEA53D1L0T/iiot-edge-box-core-harmony-ipc-emmc-dc-linux-tpm/
+
+Build steps
+-----------
+
+First, setup ``CROSS_COMPILE`` for aarch64. Then, build U-Boot for ``hmibsc``::
+
+  $ export CROSS_COMPILE=<aarch64 toolchain prefix>
+  $ make hmibsc_defconfig
+  $ make
+
+This will build ``u-boot.elf`` in the configured output directory.
+
+Installation
+------------
+
+Although the HMIBSC does not have secure boot set up by default, the firmware
+still expects firmware ELF images to be "signed". The signature does not provide
+any security in this case, but it provides the firmware with some required
+metadata.
+
+To "sign" ``u-boot.elf`` you can use e.g. `qtestsign`_::
+
+  $ ./qtestsign.py aboot u-boot.elf
+
+Then install the resulting ``u-boot-test-signed.mbn`` to the ``aboot`` partition
+on your device, e.g. with ``fastboot flash aboot u-boot-test-signed.mbn``.
+
+U-Boot should be running after a reboot (``fastboot reboot``).
+
+.. _qtestsign: https://github.com/msm8916-mainline/qtestsign

doc/board/schneider/index.rst

@@ -0,0 +1,9 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+Schneider Electric
+==================
+
+.. toctree::
+   :maxdepth: 2
+
+   hmibsc

include/configs/hmibsc.h

@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Board configuration file for HMIBSC
+ *
+ * (C) Copyright 2024 Sumit Garg <sumit.garg@linaro.org>
+ */
+
+#ifndef __CONFIGS_HMIBSC_H
+#define __CONFIGS_HMIBSC_H
+
+/* PHY needs a longer aneg time */
+#define PHY_ANEG_TIMEOUT		8000
+
+#define CFG_ENV_FLAGS_LIST_STATIC "BOOT_A_LEFT:dw,BOOT_B_LEFT:dw,BOOT_ORDER:sw"
+
+#endif