board: amlogic: add support for S400 board

The S400 board is the Amlogic AXG SoC reference board including :
 - Amlogic A113DX ARM Cortex-A53 quad-core SoC @ 1.2GHz
 - 1GB DDR4 SDRAM
 - 10/100 Ethernet
 - 2 x USB 2.0 Host
 - eMMC
 - Infrared receiver
 - SDIO WiFi Module
 - MIPI DSI Connector
 - Audio HAT Connector
 - PCI-E M.2 Connectors

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

arch/arm/mach-meson/Kconfig

@@ -63,6 +63,7 @@ config SYS_BOARD
 	default "odroid-c2" if MESON_GXBB
 	default "p212" if MESON_GXL
 	default "q200" if MESON_GXM
+	default "s400" if MESON_AXG
 	default ""
 	help
 	  This option contains information about board name.

board/amlogic/s400/MAINTAINERS

@@ -0,0 +1,6 @@
+S400
+M:	Neil Armstrong <narmstrong@baylibre.com>
+S:	Maintained
+F:	board/amlogic/s400/
+F:	include/configs/s400.h
+F:	configs/s400_defconfig

board/amlogic/s400/Makefile

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2016 BayLibre, SAS
+# Author: Neil Armstrong <narmstrong@baylibre.com>
+
+obj-y	:= s400.o

board/amlogic/s400/README

@@ -0,0 +1,110 @@
+U-Boot for Amlogic S400
+=======================
+
+S400 is a reference board manufactured by Amlogic with the following
+specifications:
+
+ - Amlogic A113DX ARM Cortex-A53 quad-core SoC @ 1.2GHz
+ - 1GB DDR4 SDRAM
+ - 10/100 Ethernet
+ - 2 x USB 2.0 Host
+ - eMMC
+ - Infrared receiver
+ - SDIO WiFi Module
+ - MIPI DSI Connector
+ - Audio HAT Connector
+ - PCI-E M.2 Connectors
+
+Schematics are available from Amlogic on demand.
+
+Currently the u-boot port supports the following devices:
+ - serial
+ - eMMC
+ - Ethernet
+ - I2C
+ - Regulators
+ - Reset controller
+ - Clock controller
+ - USB Host
+ - ADC
+
+u-boot compilation
+==================
+
+ > export ARCH=arm
+ > export CROSS_COMPILE=aarch64-none-elf-
+ > make s400_defconfig
+ > make
+
+Image creation
+==============
+
+Amlogic doesn't provide sources for the firmware and for tools needed
+to create the bootloader image, so it is necessary to obtain them from
+the git tree published by the board vendor:
+
+ > wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
+ > wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
+ > tar xvfJ gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
+ > tar xvfJ gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
+ > export PATH=$PWD/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux/bin:$PWD/gcc-linaro-arm-none-eabi-4.8-2013.11_linux/bin:$PATH
+ > git clone https://github.com/BayLibre/u-boot.git -b n-amlogic-openlinux-20170606 amlogic-u-boot
+ > cd amlogic-u-boot
+ > make axg_s400_v1_defconfig
+ > make
+ > export FIPDIR=$PWD/fip
+
+Go back to mainline U-boot source tree then :
+ > mkdir fip
+
+ > cp $FIPDIR/axg/bl2.bin fip/
+ > cp $FIPDIR/axg/acs.bin fip/
+ > cp $FIPDIR/axg/bl21.bin fip/
+ > cp $FIPDIR/axg/bl30.bin fip/
+ > cp $FIPDIR/axg/bl301.bin fip/
+ > cp $FIPDIR/axg/bl31.img fip/
+ > cp u-boot.bin fip/bl33.bin
+
+ > $FIPDIR/blx_fix.sh \
+	fip/bl30.bin \
+	fip/zero_tmp \
+	fip/bl30_zero.bin \
+	fip/bl301.bin \
+	fip/bl301_zero.bin \
+	fip/bl30_new.bin \
+	bl30
+
+ > $FIPDIR/acs_tool.pyc fip/bl2.bin fip/bl2_acs.bin fip/acs.bin 0
+
+ > $FIPDIR/blx_fix.sh \
+	fip/bl2_acs.bin \
+	fip/zero_tmp \
+	fip/bl2_zero.bin \
+	fip/bl21.bin \
+	fip/bl21_zero.bin \
+	fip/bl2_new.bin \
+	bl2
+
+ > $FIPDIR/axg/aml_encrypt_axg --bl3sig --input fip/bl30_new.bin \
+					--output fip/bl30_new.bin.enc \
+					--level v3 --type bl30
+ > $FIPDIR/axg/aml_encrypt_axg --bl3sig --input fip/bl31.img \
+					--output fip/bl31.img.enc \
+					--level v3 --type bl31
+ > $FIPDIR/axg/aml_encrypt_axg --bl3sig --input fip/bl33.bin --compress lz4 \
+					--output fip/bl33.bin.enc \
+					--level v3 --type bl33
+ > $FIPDIR/axg/aml_encrypt_axg --bl2sig --input fip/bl2_new.bin \
+					--output fip/bl2.n.bin.sig
+ > $FIPDIR/axg/aml_encrypt_axg --bootmk \
+		--output fip/u-boot.bin \
+		--bl2 fip/bl2.n.bin.sig \
+		--bl30 fip/bl30_new.bin.enc \
+		--bl31 fip/bl31.img.enc \
+		--bl33 fip/bl33.bin.enc --level v3
+
+and then write the image to SD with:
+
+ > DEV=/dev/your_sd_device
+ > dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
+ > dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=444

board/amlogic/s400/s400.c

@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <environment.h>
+#include <asm/io.h>
+#include <asm/arch/axg.h>
+#include <asm/arch/sm.h>
+#include <asm/arch/eth.h>
+#include <asm/arch/mem.h>
+
+int board_init(void)
+{
+	return 0;
+}
+
+int misc_init_r(void)
+{
+	meson_eth_init(PHY_INTERFACE_MODE_RGMII, 0);
+
+	return 0;
+}
+
+int ft_board_setup(void *blob, bd_t *bd)
+{
+	meson_init_reserved_memory(blob);
+
+	return 0;
+}

configs/s400_defconfig

@@ -0,0 +1,38 @@
+CONFIG_ARM=y
+CONFIG_ARCH_MESON=y
+CONFIG_SYS_TEXT_BASE=0x01000000
+CONFIG_MESON_AXG=y
+CONFIG_DEBUG_UART_BASE=0xff803000
+CONFIG_DEBUG_UART_CLOCK=24000000
+CONFIG_IDENT_STRING=" s400"
+CONFIG_DEBUG_UART=y
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_OF_BOARD_SETUP=y
+CONFIG_MISC_INIT_R=y
+# CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_DISPLAY_BOARDINFO is not set
+# CONFIG_CMD_BDI is not set
+# CONFIG_CMD_IMI is not set
+CONFIG_CMD_GPIO=y
+# CONFIG_CMD_LOADS is not set
+CONFIG_CMD_MMC=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_REGULATOR=y
+CONFIG_OF_CONTROL=y
+CONFIG_DEFAULT_DEVICE_TREE="meson-axg-s400"
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_DM_GPIO=y
+CONFIG_DM_MMC=y
+CONFIG_MMC_MESON_GX=y
+CONFIG_DM_ETH=y
+CONFIG_ETH_DESIGNWARE=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_MESON_AXG=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_RESET=y
+CONFIG_DEBUG_UART_MESON=y
+CONFIG_DEBUG_UART_ANNOUNCE=y
+CONFIG_DEBUG_UART_SKIP_INIT=y
+CONFIG_MESON_SERIAL=y
+CONFIG_OF_LIBFDT_OVERLAY=y