arm: add initial support for Amlogic Meson and ODROID-C2

This adds platform code for the Amlogic Meson GXBaby (S905) SoC and a
board definition for ODROID-C2. This initial submission only supports
UART and Ethernet (through the existing Designware driver). DTS files
are the ones submitted to Linux arm-soc for 4.7 [1].

[1] https://patchwork.ozlabs.org/patch/603583/

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

5 files changed, 136 insertions, 0 deletions

diff --git a/board/hardkernel/odroid-c2/Kconfig b/board/hardkernel/odroid-c2/Kconfig
new file mode 100644
index 0000000000..687d9c6d28
--- /dev/null
+++ b/board/hardkernel/odroid-c2/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_ODROID_C2
+
+config SYS_BOARD
+	default "odroid-c2"
+
+config SYS_VENDOR
+	default "hardkernel"
+
+config SYS_CONFIG_NAME
+	default "odroid-c2"
+
+endif
diff --git a/board/hardkernel/odroid-c2/MAINTAINERS b/board/hardkernel/odroid-c2/MAINTAINERS
new file mode 100644
index 0000000000..23ae1e7cbc
--- /dev/null
+++ b/board/hardkernel/odroid-c2/MAINTAINERS
@@ -0,0 +1,6 @@
+ODROID-C2
+M:	Beniamino Galvani <b.galvani@gmail.com>
+S:	Maintained
+F:	board/hardkernel/odroid-c2/
+F:	include/configs/odroid-c2.h
+F:	configs/odroid-c2_defconfig
diff --git a/board/hardkernel/odroid-c2/Makefile b/board/hardkernel/odroid-c2/Makefile
new file mode 100644
index 0000000000..571044b66a
--- /dev/null
+++ b/board/hardkernel/odroid-c2/Makefile
@@ -0,0 +1,7 @@
+#
+# (C) Copyright 2016 Beniamino Galvani <b.galvani@gmail.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= odroid-c2.o
diff --git a/board/hardkernel/odroid-c2/README b/board/hardkernel/odroid-c2/README
new file mode 100644
index 0000000000..d6d266a5ce
--- /dev/null
+++ b/board/hardkernel/odroid-c2/README
@@ -0,0 +1,60 @@
+U-Boot for ODROID-C2
+====================
+
+ODROID-C2 is a single board computer manufactured by Hardkernel
+Co. Ltd with the following specifications:
+
+ - Amlogic S905 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
+ - Ethernet
+
+u-boot compilation
+==================
+
+ > export ARCH=arm
+ > export CROSS_COMPILE=aarch64-none-elf-
+ > make odroid-c2_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:
+
+ > DIR=odroid-c2
+ > git clone --depth 1 \
+       https://github.com/hardkernel/u-boot.git -b odroidc2-v2015.01 \
+       $DIR
+ > $DIR/fip/fip_create --bl30  $DIR/fip/gxb/bl30.bin \
+                       --bl301 $DIR/fip/gxb/bl301.bin \
+                       --bl31  $DIR/fip/gxb/bl31.bin \
+                       --bl33  u-boot.bin \
+                       $DIR/fip.bin
+ > $DIR/fip/fip_create --dump $DIR/fip.bin
+ > cat $DIR/fip/gxb/bl2.package $DIR/fip.bin > $DIR/boot_new.bin
+ > $DIR/fip/gxb/aml_encrypt_gxb --bootsig \
+                                --input $DIR/boot_new.bin \
+                                --output $DIR/u-boot.img
+ > dd if=$DIR/u-boot.img of=$DIR/u-boot.gxbb bs=512 skip=96
+
+and then write the image to SD with:
+
+ > DEV=/dev/your_sd_device
+ > BL1=$DIR/sd_fuse/bl1.bin.hardkernel
+ > dd if=$BL1 of=$DEV conv=fsync bs=1 count=442
+ > dd if=$BL1 of=$DEV conv=fsync bs=512 skip=1 seek=1
+ > dd if=$DIR/u-boot.gxbb of=$DEV conv=fsync bs=512 seek=97
diff --git a/board/hardkernel/odroid-c2/odroid-c2.c b/board/hardkernel/odroid-c2/odroid-c2.c
new file mode 100644
index 0000000000..c258d4f0b8
--- /dev/null
+++ b/board/hardkernel/odroid-c2/odroid-c2.c
@@ -0,0 +1,51 @@
+/*
+ * (C) Copyright 2016 Beniamino Galvani <b.galvani@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/gxbb.h>
+#include <dm/platdata.h>
+#include <phy.h>
+
+int board_init(void)
+{
+	return 0;
+}
+
+static const struct eth_pdata gxbb_eth_pdata = {
+	.iobase = GXBB_ETH_BASE,
+	.phy_interface = PHY_INTERFACE_MODE_RGMII,
+};
+
+U_BOOT_DEVICE(meson_eth) = {
+	.name = "eth_designware",
+	.platdata = &gxbb_eth_pdata,
+};
+
+int misc_init_r(void)
+{
+	/* Select Ethernet function */
+	setbits_le32(GXBB_PINMUX(6), 0x3fff);
+
+	/* Set RGMII mode */
+	setbits_le32(GXBB_ETH_REG_0, GXBB_ETH_REG_0_PHY_INTF |
+				     GXBB_ETH_REG_0_TX_PHASE(1) |
+				     GXBB_ETH_REG_0_TX_RATIO(4) |
+				     GXBB_ETH_REG_0_PHY_CLK_EN |
+				     GXBB_ETH_REG_0_CLK_EN);
+
+	/* 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);
+
+	/* Reset PHY on GPIOZ_14 */
+	clrbits_le32(GXBB_GPIO_EN(3), BIT(14));
+	clrbits_le32(GXBB_GPIO_OUT(3), BIT(14));
+	mdelay(10);
+	setbits_le32(GXBB_GPIO_OUT(3), BIT(14));
+
+	return 0;
+}