arm: Add LibreTech CC support based on Meson GXL family

This adds platform code for the Libre Computer CC "Le Potato" board based on a
Meson GXL (S905X) SoC with the Meson GXL configuration.

This initial submission supports UART, MMC/SDCard and Ethernet with the
Internal RMII PHY.

The meson-gxl-s905x-libretech-cc.dts is synchronised from the linux 4.13
stable tree as of 4.13.8.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

5 files changed, 175 insertions, 0 deletions

diff --git a/board/amlogic/libretech-cc/Kconfig b/board/amlogic/libretech-cc/Kconfig
new file mode 100644
index 0000000000..7a6f9169bd
--- /dev/null
+++ b/board/amlogic/libretech-cc/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_LIBRETECH_CC
+
+config SYS_BOARD
+	default "libretech-cc"
+
+config SYS_VENDOR
+	default "amlogic"
+
+config SYS_CONFIG_NAME
+	default "libretech-cc"
+
+endif
diff --git a/board/amlogic/libretech-cc/MAINTAINERS b/board/amlogic/libretech-cc/MAINTAINERS
new file mode 100644
index 0000000000..398ce57db2
--- /dev/null
+++ b/board/amlogic/libretech-cc/MAINTAINERS
@@ -0,0 +1,6 @@
+LIBRETECH-CC
+M:	Neil Armstrong <narmstrong@baylibre.com>
+S:	Maintained
+F:	board/amlogic/libretech-cc/
+F:	include/configs/libretech-cc.h
+F:	configs/libretech-cc_defconfig
diff --git a/board/amlogic/libretech-cc/Makefile b/board/amlogic/libretech-cc/Makefile
new file mode 100644
index 0000000000..d0e3bbb991
--- /dev/null
+++ b/board/amlogic/libretech-cc/Makefile
@@ -0,0 +1,8 @@
+#
+# (C) Copyright 2016 BayLibre, SAS
+# Author: Neil Armstrong <narmstrong@baylibre.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= libretech-cc.o
diff --git a/board/amlogic/libretech-cc/README b/board/amlogic/libretech-cc/README
new file mode 100644
index 0000000000..c06a392482
--- /dev/null
+++ b/board/amlogic/libretech-cc/README
@@ -0,0 +1,96 @@
+U-Boot for LibreTech CC
+=======================
+
+LibreTech CC is a single board computer manufactured by Libre Technology
+with the following specifications:
+
+ - Amlogic S905X ARM Cortex-A53 quad-core SoC @ 2GHz
+ - 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 libretech-cc_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:$PATH
+ > git clone https://github.com/BayLibre/u-boot.git -b libretech-cc amlogic-u-boot
+ > cd amlogic-u-boot
+ > make libretech_cc_defconfig
+ > make
+ > export FIPDIR=$PWD/fip
+
+Go back to mainline U-Boot source tree then :
+ > mkdir fip
+
+ > cp $FIPDIR/gxl/bl2.bin fip/
+ > cp $FIPDIR/gxl/acs.bin fip/
+ > cp $FIPDIR/gxl/bl21.bin fip/
+ > cp $FIPDIR/gxl/bl30.bin fip/
+ > cp $FIPDIR/gxl/bl301.bin fip/
+ > cp $FIPDIR/gxl/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/gxl/aml_encrypt_gxl --bl3enc --input fip/bl30_new.bin
+ > $FIPDIR/gxl/aml_encrypt_gxl --bl3enc --input fip/bl31.img
+ > $FIPDIR/gxl/aml_encrypt_gxl --bl3enc --input fip/bl33.bin
+ > $FIPDIR/gxl/aml_encrypt_gxl --bl2sig --input fip/bl2_new.bin --output fip/bl2.n.bin.sig
+ > $FIPDIR/gxl/aml_encrypt_gxl --bootmk \
+		--output fip/u-boot.bin \
+		--bl2 fip/bl2.n.bin.sig \
+		--bl30 fip/bl30_new.bin.enc \
+		--bl31 fip/bl31.img.enc \
+		--bl33 fip/bl33.bin.enc
+
+and then write the image to SD with:
+
+ > DEV=/dev/your_sd_device
+ > dd if=fip/u-boot.bin.sd.bin of=$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
diff --git a/board/amlogic/libretech-cc/libretech-cc.c b/board/amlogic/libretech-cc/libretech-cc.c
new file mode 100644
index 0000000000..26c0e78a46
--- /dev/null
+++ b/board/amlogic/libretech-cc/libretech-cc.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2016 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <asm/io.h>
+#include <asm/arch/gxbb.h>
+#include <asm/arch/sm.h>
+#include <asm/arch/eth.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_RMII,
+			  MESON_GXL_USE_INTERNAL_RMII_PHY);
+
+	/* Enable power and clock gate */
+	setbits_le32(GXBB_GCLK_MPEG_1, GXBB_GCLK_MPEG_1_ETH);
+	clrbits_le32(GXBB_MEM_PD_REG_0, GXBB_MEM_PD_REG_0_ETH_MASK);
+
+	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;
+}