boards: amlogic: Add FriendlyElec NanoPi K2 board support

This adds platform code for the FriendlyElec NanoPi K2 board based on a
Meson GXBB (S905) SoC with the Meson GXBB configuration.

This initial submission only supports:
- UART
- MMC/SDCard
- Ethernet
- Reset Controller
- Clock controller

Cc: Yuefei Tan <yftan@friendlyarm.com>
Signed-off-by: Thomas McKahan <tonymckahan@gmail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

5 files changed, 185 insertions, 0 deletions

diff --git a/board/amlogic/nanopi-k2/Kconfig b/board/amlogic/nanopi-k2/Kconfig
new file mode 100644
index 0000000000..374bda200c
--- /dev/null
+++ b/board/amlogic/nanopi-k2/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_NANOPI_K2
+
+config SYS_BOARD
+	default "nanopi-k2"
+
+config SYS_VENDOR
+	default "amlogic"
+
+config SYS_CONFIG_NAME
+	default "nanopi-k2"
+
+endif
diff --git a/board/amlogic/nanopi-k2/MAINTAINERS b/board/amlogic/nanopi-k2/MAINTAINERS
new file mode 100644
index 0000000000..0452bd1fa1
--- /dev/null
+++ b/board/amlogic/nanopi-k2/MAINTAINERS
@@ -0,0 +1,6 @@
+NANOPI-K2
+M:	Neil Armstrong <narmstrong@baylibre.com>
+S:	Maintained
+F:	board/amlogic/nanopi-k2/
+F:	include/configs/nanopi-k2.h
+F:	configs/nanopi-k2_defconfig
diff --git a/board/amlogic/nanopi-k2/Makefile b/board/amlogic/nanopi-k2/Makefile
new file mode 100644
index 0000000000..7d9b666e76
--- /dev/null
+++ b/board/amlogic/nanopi-k2/Makefile
@@ -0,0 +1,7 @@
+#
+# (C) Copyright 2018 Thomas McKahan
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= nanopi-k2.o
diff --git a/board/amlogic/nanopi-k2/README b/board/amlogic/nanopi-k2/README
new file mode 100644
index 0000000000..d450d3c2b2
--- /dev/null
+++ b/board/amlogic/nanopi-k2/README
@@ -0,0 +1,99 @@
+U-Boot for NanoPi-K2
+====================
+
+NanoPi-K2 is a single board computer manufactured by FriendlyElec
+with the following specifications:
+
+ - Amlogic S905 ARM Cortex-A53 quad-core SoC @ 1.5GHz
+ - ARM Mali 450 GPU
+ - 2GB DDR3 SDRAM
+ - Gigabit Ethernet
+ - HDMI 2.0 4K/60Hz display
+ - 40-pin GPIO header
+ - 4 x USB 2.0 Host, 1 x USB OTG
+ - eMMC, microSD
+ - Infrared receiver
+
+Schematics are available on the manufacturer website.
+
+Currently the u-boot port supports the following devices:
+ - serial
+ - eMMC, microSD
+ - Ethernet
+
+u-boot compilation
+==================
+
+ > export ARCH=arm
+ > export CROSS_COMPILE=aarch64-none-elf-
+ > make nanopi-k2_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:$PATH
+ > git clone https://github.com/BayLibre/u-boot.git -b libretech-cc amlogic-u-boot
+ > git clone https://github.com/friendlyarm/u-boot.git -b nanopi-k2-v2015.01 amlogic-u-boot
+ > cd amlogic-u-boot
+ > sed -i 's/aarch64-linux-gnu-/aarch64-none-elf-/' Makefile
+ > sed -i 's/arm-linux-/arm-none-eabi-/' arch/arm/cpu/armv8/gxb/firmware/scp_task/Makefile
+ > make nanopi-k2_defconfig
+ > make
+ > export FIPDIR=$PWD/fip
+
+Go back to mainline U-Boot source tree then :
+ > mkdir fip
+
+ > cp $FIPDIR/gxb/bl2.bin fip/
+ > cp $FIPDIR/gxb/acs.bin fip/
+ > cp $FIPDIR/gxb/bl21.bin fip/
+ > cp $FIPDIR/gxb/bl30.bin fip/
+ > cp $FIPDIR/gxb/bl301.bin fip/
+ > cp $FIPDIR/gxb/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/fip_create \
+	 --bl30 fip/bl30_new.bin \
+	 --bl31 fip/bl31.img \
+	 --bl33 fip/bl33.bin \
+	 fip/fip.bin
+
+ > python $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
+
+ > cat fip/bl2_new.bin fip/fip.bin > fip/boot_new.bin
+
+ > $FIPDIR/gxb/aml_encrypt_gxb --bootsig \
+		--input fip/boot_new.bin
+		--output fip/u-boot.bin
+
+and then write the image to SD with:
+
+ > DEV=/dev/your_sd_device
+ > dd if=fip/u-boot.bin of=$DEV conv=fsync,notrunc bs=512 seek=1
diff --git a/board/amlogic/nanopi-k2/nanopi-k2.c b/board/amlogic/nanopi-k2/nanopi-k2.c
new file mode 100644
index 0000000000..339dbb81db
--- /dev/null
+++ b/board/amlogic/nanopi-k2/nanopi-k2.c
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2018 Thomas McKahan
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <environment.h>
+#include <asm/io.h>
+#include <asm/arch/gx.h>
+#include <asm/arch/sm.h>
+#include <asm/arch/eth.h>
+#include <asm/arch/mem.h>
+
+#define EFUSE_SN_OFFSET		20
+#define EFUSE_SN_SIZE		16
+#define EFUSE_MAC_OFFSET	52
+#define EFUSE_MAC_SIZE		6
+
+int board_init(void)
+{
+	return 0;
+}
+
+int misc_init_r(void)
+{
+	u8 mac_addr[EFUSE_MAC_SIZE];
+	char serial[EFUSE_SN_SIZE];
+	ssize_t len;
+
+	meson_gx_eth_init(PHY_INTERFACE_MODE_RGMII, 0);
+
+	/* Reset PHY on GPIOZ_14 */
+	clrbits_le32(GX_GPIO_EN(3), BIT(14));
+	clrbits_le32(GX_GPIO_OUT(3), BIT(14));
+	mdelay(10);
+	setbits_le32(GX_GPIO_OUT(3), BIT(14));
+
+	if (!eth_env_get_enetaddr("ethaddr", mac_addr)) {
+		len = meson_sm_read_efuse(EFUSE_MAC_OFFSET,
+					  mac_addr, EFUSE_MAC_SIZE);
+		if (len == EFUSE_MAC_SIZE && is_valid_ethaddr(mac_addr))
+			eth_env_set_enetaddr("ethaddr", mac_addr);
+	}
+
+	if (!env_get("serial#")) {
+		len = meson_sm_read_efuse(EFUSE_SN_OFFSET, serial,
+			EFUSE_SN_SIZE);
+		if (len == EFUSE_SN_SIZE)
+			env_set("serial#", serial);
+	}
+
+	return 0;
+}
+
+int ft_board_setup(void *blob, bd_t *bd)
+{
+	meson_gx_init_reserved_memory(blob);
+
+	return 0;
+}