ARM64: poplar: hi3798cv200: u-boot support for Poplar 96Boards

This port adds support for:
        1) Serial
        2) eMMC
        3) USB

It has been tested with ARM TRUSTED FIRMWARE running u-boot as the
BL33 executable [see board's README]

eMMC has been tested for reading and booting the loader and linux
kernels as well as saving the u-boot environment.

USB has been tested with ASIX networking adapter and SanDisk 7.4GB
drive.

PSCI has been tested via the reset call (PSCI executes from DDR)

The firwmare upgrade process has been tested via TFTP and USB FAT
filesystem containing the fastboot.bin image in one of the partitions.

Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>

11 files changed, 708 insertions, 0 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3c3f5f7..5f2048b 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -837,6 +837,19 @@ config TARGET_HIKEY
 	  Support for HiKey 96boards platform. It features a HI6220
 	  SoC, with 8xA53 CPU, mali450 gpu, and 1GB RAM.
 
+config TARGET_POPLAR
+	bool "Support Poplar 96boards Enterprise Edition Platform"
+	select ARM64
+	select DM
+	select OF_CONTROL
+	select DM_SERIAL
+	select DM_USB
+	  help
+	  Support for Poplar 96boards EE platform. It features a HI3798cv200
+	  SoC, with 4xA53 CPU, 1GB RAM and the high performance Mali T720 GPU
+	  making it capable of running any commercial set-top solution based on
+	  Linux or Android.
+
 config TARGET_LS1012AQDS
 	bool "Support ls1012aqds"
 	select ARCH_LS1012A
@@ -1165,6 +1178,7 @@ source "board/grinn/chiliboard/Kconfig"
 source "board/gumstix/pepper/Kconfig"
 source "board/h2200/Kconfig"
 source "board/hisilicon/hikey/Kconfig"
+source "board/hisilicon/poplar/Kconfig"
 source "board/imx31_phycore/Kconfig"
 source "board/isee/igep003x/Kconfig"
 source "board/olimex/mx23_olinuxino/Kconfig"
diff --git a/arch/arm/dts/hi3798cv200-u-boot.dtsi b/arch/arm/dts/hi3798cv200-u-boot.dtsi
new file mode 100644
index 0000000..2b3713b
--- /dev/null
+++ b/arch/arm/dts/hi3798cv200-u-boot.dtsi
@@ -0,0 +1,29 @@
+/*
+ * U-Boot addition to:
+ *  1) use platform data for the console
+ *  2) provide support for the generic-ehci USB driver currently not available
+ *     in the linux kernel (8/May/2017).
+ *
+ * (C) Copyright 2017 Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+&soc {
+	usb2: ehci@9890000 {
+		compatible = "generic-ehci";
+		reg = <0x9890000 0x100>;
+		status = "okay";
+	};
+};
+
+&uart0 {
+	status = "disabled";
+};
+
+/{
+	chosen {
+		stdout-path = "";
+	};
+};
+
diff --git a/arch/arm/include/asm/arch-hi3798cv200/dwmmc.h b/arch/arm/include/asm/arch-hi3798cv200/dwmmc.h
new file mode 100644
index 0000000..1060d94
--- /dev/null
+++ b/arch/arm/include/asm/arch-hi3798cv200/dwmmc.h
@@ -0,0 +1,13 @@
+/*
+ * (C) Copyright 2017 Linaro
+ * Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _HI3798cv200_DWMMC_H_
+#define _HI3798cv200_DWMMC_H_
+
+int hi6220_dwmci_add_port(int index, u32 regbase, int bus_width);
+
+#endif /* _HI3798cv200_DWMMC_H_ */
diff --git a/arch/arm/include/asm/arch-hi3798cv200/hi3798cv200.h b/arch/arm/include/asm/arch-hi3798cv200/hi3798cv200.h
new file mode 100644
index 0000000..d30e0b4
--- /dev/null
+++ b/arch/arm/include/asm/arch-hi3798cv200/hi3798cv200.h
@@ -0,0 +1,50 @@
+/*
+ * (C) Copyright 2017 Linaro
+ * Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __HI3798cv200_H__
+#define __HI3798cv200_H__
+
+#define REG_BASE_PERI_CTRL		0xF8A20000
+#define REG_BASE_CRG			0xF8A22000
+
+/* DEVICES */
+#define REG_BASE_MCI			0xF9830000
+#define REG_BASE_UART0			0xF8B00000
+
+/* PERI control registers (4KB) */
+	/* USB2 PHY01 configuration register */
+#define PERI_CTRL_USB0			(REG_BASE_PERI_CTRL + 0x120)
+
+/* PERI CRG registers (4KB) */
+	/* USB2 CTRL0 clock and soft reset */
+#define PERI_CRG46			(REG_BASE_CRG + 0xb8)
+#define USB2_BUS_CKEN			(1<<0)
+#define USB2_OHCI48M_CKEN		(1<<1)
+#define USB2_OHCI12M_CKEN		(1<<2)
+#define USB2_OTG_UTMI_CKEN		(1<<3)
+#define USB2_HST_PHY_CKEN		(1<<4)
+#define USB2_UTMI0_CKEN			(1<<5)
+#define USB2_BUS_SRST_REQ		(1<<12)
+#define USB2_UTMI0_SRST_REQ		(1<<13)
+#define USB2_HST_PHY_SYST_REQ		(1<<16)
+#define USB2_OTG_PHY_SYST_REQ		(1<<17)
+#define USB2_CLK48_SEL			(1<<20)
+
+	/* USB2 PHY clock and soft reset */
+#define PERI_CRG47			(REG_BASE_CRG + 0xbc)
+#define USB2_PHY01_REF_CKEN		(1 << 0)
+#define USB2_PHY2_REF_CKEN		(1 << 2)
+#define USB2_PHY01_SRST_REQ		(1 << 4)
+#define USB2_PHY2_SRST_REQ		(1 << 6)
+#define USB2_PHY01_SRST_TREQ0		(1 << 8)
+#define USB2_PHY01_SRST_TREQ1		(1 << 9)
+#define USB2_PHY2_SRST_TREQ		(1 << 10)
+#define USB2_PHY01_REFCLK_SEL		(1 << 12)
+#define USB2_PHY2_REFCLK_SEL		(1 << 14)
+
+
+#endif
diff --git a/board/hisilicon/poplar/Kconfig b/board/hisilicon/poplar/Kconfig
new file mode 100644
index 0000000..3397295
--- /dev/null
+++ b/board/hisilicon/poplar/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_POPLAR
+
+config SYS_BOARD
+	default "poplar"
+
+config SYS_VENDOR
+	default "hisilicon"
+
+config SYS_SOC
+	default "hi3798cv200"
+
+config SYS_CONFIG_NAME
+	default "poplar"
+
+endif
diff --git a/board/hisilicon/poplar/MAINTAINERS b/board/hisilicon/poplar/MAINTAINERS
new file mode 100644
index 0000000..0cc01c8
--- /dev/null
+++ b/board/hisilicon/poplar/MAINTAINERS
@@ -0,0 +1,6 @@
+Poplar BOARD
+M:     Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
+S:     Maintained
+F:     board/hisilicon/poplar
+F:     include/configs/poplar.h
+F:     configs/poplar_defconfig
diff --git a/board/hisilicon/poplar/Makefile b/board/hisilicon/poplar/Makefile
new file mode 100644
index 0000000..101545d
--- /dev/null
+++ b/board/hisilicon/poplar/Makefile
@@ -0,0 +1,7 @@
+#
+# (C) Copyright 2017 Linaro
+# Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+obj-y	:= poplar.o
diff --git a/board/hisilicon/poplar/README b/board/hisilicon/poplar/README
new file mode 100644
index 0000000..99ed6ce
--- /dev/null
+++ b/board/hisilicon/poplar/README
@@ -0,0 +1,288 @@
+================================================================================
+			Board Information
+================================================================================
+
+Developed by HiSilicon, the board features the Hi3798C V200 with an
+integrated quad-core 64-bit ARM Cortex A53 processor and high
+performance Mali T720 GPU, making it capable of running any commercial
+set-top solution based on Linux or Android. Its high performance
+specification also supports a premium user experience with up to H.265
+HEVC decoding of 4K video at 60 frames per second.
+
+SOC  Hisilicon Hi3798CV200
+CPU  Quad-core ARM Cortex-A53 64 bit
+DRAM DDR3/3L/4 SDRAM interface, maximum 32-bit data width 2 GB
+USB  Two USB 2.0 ports One USB 3.0 ports
+CONSOLE  USB-micro port for console support
+ETHERNET  1 GBe Ethernet
+PCIE  One PCIe 2.0 interfaces
+JTAG  8-Pin JTAG
+EXPANSION INTERFACE  Linaro 96Boards Low Speed Expansion slot
+DIMENSION Standard 160×120 mm 96Boards Enterprice Edition form factor
+WIFI  802.11AC 2*2 with Bluetooth
+CONNECTORS  One connector for Smart Card One connector for TSI
+
+
+================================================================================
+			BUILD INSTRUCTIONS
+================================================================================
+
+Note of warning:
+================
+
+U-boot has a *strong* dependency with the l-loader and the arm trusted firmware
+repositories.
+
+The boot sequence is:
+	l-loader --> arm_trusted_firmware --> u-boot
+
+U-Boot needs to be aware of the BL31 runtime location and size to avoid writing
+over it. Currently, BL31 is being placed below the kernel text offset (check
+poplar.c) but this could change in the future.
+
+The current version of u-boot has been tested with:
+ - https://github.com/Linaro/poplar-l-loader.git
+
+	commit f0988698dcc5c08bd0a8f50aa0457e138a5f438c
+	Author: Alex Elder <elder@linaro.org>
+	Date:   Fri Jun 16 08:57:59 2017 -0500
+
+    l-loader: use external memory region definitions
+
+    The ARM Trusted Firmware code now has a header file that collects
+    all the definitions for the memory regions used for its boot stages.
+    Include that file where needed, and use the definitions found therein
+
+    Signed-off-by: Alex Elder <elder@linaro.org>
+
+
+ - https://github.com/Linaro/poplar-arm-trusted-firmware.git
+
+	commit 6ac42dd3be13c99aa8ce29a15073e2f19d935f68
+	Author: Alex Elder <elder@linaro.org>
+	Date:   Fri Jun 16 09:24:50 2017 -0500
+
+    poplar: define memory regions in a separate file
+
+    Separate the definitions for memory regions used for the BL stage
+    images and FIP into a new file.  The "l-loader" image uses knowledge
+    of the sizes and locations of these memory regions, and it can now
+    include this (external) header to get these definitions, rather than
+    having to make coordinated changes to both code bases.
+
+    The new file has a complete set of definitions (more than may be
+    required by one or the other user).  It also includes a summary of
+    how the boot process works, and how it uses these regions.
+
+    It should now be relatively easy to adjust the sizes and locations
+    of these memory regions, or to add to them (e.g. for TEE).
+
+    Signed-off-by: Alex Elder <elder@linaro.org>
+
+
+Compile from source:
+====================
+
+Get all the sources
+
+  > mkdir -p ~/poplar/src ~/poplar/bin
+  > cd ~/poplar/src
+  > git clone https://github.com/Linaro/poplar-l-loader.git l-loader
+  > git clone https://github.com/Linaro/poplar-arm-trusted-firmware.git atf
+  > git clone https://github.com/Linaro/poplar-u-boot.git u-boot
+
+Make sure you are using the correct branch on each one of these repositories.
+The definition of "correct" might change over time (at this moment in time this
+would be the "latest" branch).
+
+Compile U-Boot:
+===============
+
+  Prerequisite:
+  # sudo apt-get install device-tree-compiler
+
+  > cd ~/poplar/src/u-boot
+  > make CROSS_COMPILE=aarch64-linux-gnu- poplar_defconfig
+  > make CROSS_COMPILE=aarch64-linux-gnu-
+  > cp u-boot.bin ~/poplar/bin
+
+Compile ARM Trusted Firmware (ATF):
+===================================
+
+  > cd ~/poplar/src/atf
+  > make CROSS_COMPILE=aarch64-linux-gnu- all fip \
+		SPD=none BL33=~/poplar/bin/u-boot.bin DEBUG=1 PLAT=poplar
+
+Copy resulting binaries
+  > cp build/hi3798cv200/debug/bl1.bin ~/poplar/src/l-loader/atf/
+  > cp build/hi3798cv200/debug/fip.bin ~/poplar/src/l-loader/atf/
+
+Compile l-loader:
+=================
+
+  > cd ~/poplar/src/l-loader
+  > make clean
+  > make CROSS_COMPILE=arm-linux-gnueabi-
+
+   Due to BootROM requiremets, rename l-loader.bin to fastboot.bin:
+  > cp l-loader.bin ~/poplar/bin/fastboot.bin
+
+
+================================================================================
+			FLASH INSTRUCTIONS
+================================================================================
+
+Two methods:
+
+Using USB debrick support:
+	Copy fastboot.bin to a FAT partition on the USB drive and reboot the
+       poplar board while pressing S3(usb_boot).
+
+       The system will execute the new u-boot and boot into a shell which you
+       can then use to write to eMMC.
+
+Using U-BOOT from shell:
+	1) using AXIS usb ethernet dongle and tftp
+	2) using FAT formated USB drive
+
+
+1. TFTP (USB ethernet dongle)
+=============================
+
+Plug a USB AXIS ethernet dongle on any of the USB2 ports on the Poplar board.
+Copy fastboot.bin to your tftp server.
+In u-boot make sure your network is properly setup.
+
+Then
+
+=> tftp 0x30000000 fastboot.bin
+starting USB...
+USB0:   USB EHCI 1.00
+scanning bus 0 for devices... 1 USB Device(s) found
+USB1:   USB EHCI 1.00
+scanning bus 1 for devices... 3 USB Device(s) found
+       scanning usb for storage devices... 0 Storage Device(s) found
+       scanning usb for ethernet devices... 1 Ethernet Device(s) found
+Waiting for Ethernet connection... done.
+Using asx0 device
+TFTP from server 192.168.1.4; our IP address is 192.168.1.10
+Filename 'poplar/fastboot.bin'.
+Load address: 0x30000000
+Loading: #################################################################
+	 #################################################################
+	 ###############################################################
+	 2 MiB/s
+done
+Bytes transferred = 983040 (f0000 hex)
+
+=> mmc write 0x30000000 0 0x780
+
+MMC write: dev # 0, block # 0, count 1920 ... 1920 blocks written: OK
+=> reset
+
+
+2. USING USB FAT DRIVE
+=======================
+
+Copy fastboot.bin to any partition on a FAT32 formated usb flash drive.
+Enter the uboot prompt
+
+=> fatls usb 0:2
+   983040   fastboot.bin
+
+1 file(s), 0 dir(s)
+
+=> fatload usb 0:2 0x30000000 fastboot.bin
+reading fastboot.bin
+983040 bytes read in 44 ms (21.3 MiB/s)
+
+=> mmc write 0x30000000 0 0x780
+
+MMC write: dev # 0, block # 0, count 1920 ... 1920 blocks written: OK
+
+
+================================================================================
+				BOOT TRACE
+================================================================================
+
+Bootrom start
+Boot Media: eMMC
+Decrypt auxiliary code ...OK
+
+lsadc voltage min: 000000FE, max: 000000FF, aver: 000000FE, index: 00000000
+
+Entry boot auxiliary code
+
+Auxiliary code - v1.00
+DDR code - V1.1.2 20160205
+Build: Mar 24 2016 - 17:09:44
+Reg Version:  v134
+Reg Time:     2016/03/18 09:44:55
+Reg Name:     hi3798cv2dmb_hi3798cv200_ddr3_2gbyte_8bitx4_4layers.reg
+
+Boot auxiliary code success
+Bootrom success
+
+LOADER:  Switched to aarch64 mode
+LOADER:  Entering ARM TRUSTED FIRMWARE
+LOADER:  CPU0 executes at 0x000ce000
+
+INFO:    BL1: 0xe1000 - 0xe7000 [size = 24576]
+NOTICE:  Booting Trusted Firmware
+NOTICE:  BL1: v1.3(debug):v1.3-372-g1ba9c60
+NOTICE:  BL1: Built : 17:51:33, Apr 30 2017
+INFO:    BL1: RAM 0xe1000 - 0xe7000
+INFO:    BL1: Loading BL2
+INFO:    Loading image id=1 at address 0xe9000
+INFO:    Image id=1 loaded at address 0xe9000, size = 0x5008
+NOTICE:  BL1: Booting BL2
+INFO:    Entry point address = 0xe9000
+INFO:    SPSR = 0x3c5
+NOTICE:  BL2: v1.3(debug):v1.3-372-g1ba9c60
+NOTICE:  BL2: Built : 17:51:33, Apr 30 2017
+INFO:    BL2: Loading BL31
+INFO:    Loading image id=3 at address 0x129000
+INFO:    Image id=3 loaded at address 0x129000, size = 0x8038
+INFO:    BL2: Loading BL33
+INFO:    Loading image id=5 at address 0x37000000
+INFO:    Image id=5 loaded at address 0x37000000, size = 0x58f17
+NOTICE:  BL1: Booting BL31
+INFO:    Entry point address = 0x129000
+INFO:    SPSR = 0x3cd
+INFO:    Boot bl33 from 0x37000000 for 364311 Bytes
+NOTICE:  BL31: v1.3(debug):v1.3-372-g1ba9c60
+NOTICE:  BL31: Built : 17:51:33, Apr 30 2017
+INFO:    BL31: Initializing runtime services
+INFO:    BL31: Preparing for EL3 exit to normal world
+INFO:    Entry point address = 0x37000000
+INFO:    SPSR = 0x3c9
+
+
+U-Boot 2017.05-rc2-00130-gd2255b0 (Apr 30 2017 - 17:51:28 +0200)poplar
+
+Model: HiSilicon Poplar Development Board
+BOARD: Hisilicon HI3798cv200 Poplar
+DRAM:  1 GiB
+MMC:   Hisilicon DWMMC: 0
+In:    serial@f8b00000
+Out:   serial@f8b00000
+Err:   serial@f8b00000
+Net:   Net Initialization Skipped
+No ethernet found.
+
+Hit any key to stop autoboot:  0
+starting USB...
+USB0:   USB EHCI 1.00
+scanning bus 0 for devices... 1 USB Device(s) found
+USB1:   USB EHCI 1.00
+scanning bus 1 for devices... 4 USB Device(s) found
+       scanning usb for storage devices... 1 Storage Device(s) found
+       scanning usb for ethernet devices... 1 Ethernet Device(s) found
+
+USB device 0:
+    Device 0: Vendor: SanDisk Rev: 1.00 Prod: Cruzer Blade
+	    Type: Removable Hard Disk
+	    Capacity: 7632.0 MB = 7.4 GB (15630336 x 512)
+... is now current device
+Scanning usb 0:1...
+=>
diff --git a/board/hisilicon/poplar/poplar.c b/board/hisilicon/poplar/poplar.c
new file mode 100644
index 0000000..d542f68
--- /dev/null
+++ b/board/hisilicon/poplar/poplar.c
@@ -0,0 +1,174 @@
+/*
+ * (C) Copyright 2017 Linaro
+ * Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <dm.h>
+#include <common.h>
+#include <asm/io.h>
+#include <dm/platform_data/serial_pl01x.h>
+#include <asm/arch/hi3798cv200.h>
+#include <asm/arch/dwmmc.h>
+#include <asm/armv8/mmu.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct mm_region poplar_mem_map[] = {
+	{
+		.virt = 0x0UL,
+		.phys = 0x0UL,
+		.size = 0x80000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+			 PTE_BLOCK_INNER_SHARE
+	}, {
+		.virt = 0x80000000UL,
+		.phys = 0x80000000UL,
+		.size = 0x80000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			 PTE_BLOCK_NON_SHARE |
+			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
+	}, {
+		0,
+	}
+};
+
+struct mm_region *mem_map = poplar_mem_map;
+
+static const struct pl01x_serial_platdata serial_platdata = {
+	.base = REG_BASE_UART0,
+	.type = TYPE_PL010,
+	.clock = 75000000,
+};
+
+U_BOOT_DEVICE(poplar_serial) = {
+	.name = "serial_pl01x",
+	.platdata = &serial_platdata,
+};
+
+int checkboard(void)
+{
+	puts("BOARD: Hisilicon HI3798cv200 Poplar\n");
+
+	return 0;
+}
+
+void reset_cpu(ulong addr)
+{
+	psci_system_reset();
+}
+
+int dram_init(void)
+{
+	gd->ram_size = get_ram_size(NULL, 0x80000000);
+
+	return 0;
+}
+
+/*
+ * Some linux kernel versions don't use memory before its load address, so to
+ * be generic we just pretend it isn't there.  In previous uboot versions we
+ * carved the space used by BL31 (runs in DDR on this platfomr) so the PSCI code
+ * could persist in memory and be left alone by the kernel.
+ *
+ * That led to a problem when mapping memory in older kernels.  That PSCI code
+ * now lies in memory below the kernel load offset; it therefore won't be
+ * touched by the kernel, and by not specially reserving it we avoid the mapping
+ * problem as well.
+ *
+ */
+#define KERNEL_TEXT_OFFSET	0x00080000
+
+int dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = KERNEL_TEXT_OFFSET;
+	gd->bd->bi_dram[0].size = gd->ram_size - gd->bd->bi_dram[0].start;
+
+	return 0;
+}
+
+static void usb2_phy_config(void)
+{
+	const u32 config[] = {
+		/* close EOP pre-emphasis. open data pre-emphasis */
+		0xa1001c,
+		/* Rcomp = 150mW, increase DC level */
+		0xa00607,
+		/* keep Rcomp working */
+		0xa10700,
+		/* Icomp = 212mW, increase current drive */
+		0xa00aab,
+		/* EMI fix: rx_active not stay 1 when error packets received */
+		0xa11140,
+		/* Comp mode select */
+		0xa11041,
+		/* adjust eye diagram */
+		0xa0098c,
+		/* adjust eye diagram */
+		0xa10a0a,
+	};
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(config); i++) {
+		writel(config[i], PERI_CTRL_USB0);
+		clrsetbits_le32(PERI_CTRL_USB0, BIT(21), BIT(20) | BIT(22));
+		udelay(20);
+	}
+}
+
+static void usb2_phy_init(void)
+{
+	/* reset usb2 controller bus/utmi/roothub */
+	setbits_le32(PERI_CRG46, USB2_BUS_SRST_REQ | USB2_UTMI0_SRST_REQ |
+			USB2_HST_PHY_SYST_REQ | USB2_OTG_PHY_SYST_REQ);
+	udelay(200);
+
+	/* reset usb2 phy por/utmi */
+	setbits_le32(PERI_CRG47, USB2_PHY01_SRST_REQ | USB2_PHY01_SRST_TREQ1);
+	udelay(200);
+
+	/* open usb2 ref clk */
+	setbits_le32(PERI_CRG47, USB2_PHY01_REF_CKEN);
+	udelay(300);
+
+	/* cancel usb2 power on reset */
+	clrbits_le32(PERI_CRG47, USB2_PHY01_SRST_REQ);
+	udelay(500);
+
+	usb2_phy_config();
+
+	/* cancel usb2 port reset, wait comp circuit stable */
+	clrbits_le32(PERI_CRG47, USB2_PHY01_SRST_TREQ1);
+	mdelay(10);
+
+	/* open usb2 controller clk */
+	setbits_le32(PERI_CRG46, USB2_BUS_CKEN | USB2_OHCI48M_CKEN |
+			USB2_OHCI12M_CKEN | USB2_OTG_UTMI_CKEN |
+			USB2_HST_PHY_CKEN | USB2_UTMI0_CKEN);
+	udelay(200);
+
+	/* cancel usb2 control reset */
+	clrbits_le32(PERI_CRG46, USB2_BUS_SRST_REQ | USB2_UTMI0_SRST_REQ |
+			USB2_HST_PHY_SYST_REQ | USB2_OTG_PHY_SYST_REQ);
+	udelay(200);
+}
+
+int board_mmc_init(bd_t *bis)
+{
+	int ret;
+
+	ret = hi6220_dwmci_add_port(0, REG_BASE_MCI, 8);
+	if (ret)
+		printf("mmc init error (%d)\n", ret);
+
+	return ret;
+}
+
+int board_init(void)
+{
+	usb2_phy_init();
+
+	return 0;
+}
+
diff --git a/configs/poplar_defconfig b/configs/poplar_defconfig
new file mode 100644
index 0000000..8f9f40f
--- /dev/null
+++ b/configs/poplar_defconfig
@@ -0,0 +1,26 @@
+CONFIG_ARM=y
+CONFIG_TARGET_POPLAR=y
+CONFIG_IDENT_STRING="poplar"
+CONFIG_DEFAULT_DEVICE_TREE="hi3798cv200-poplar"
+CONFIG_SYS_PROMPT="poplar# "
+CONFIG_DISTRO_DEFAULTS=y
+CONFIG_DISPLAY_CPUINFO=n
+CONFIG_DISPLAY_BOARDINFO=y
+CONFIG_ISO_PARTITION=n
+CONFIG_MMC_DW=y
+CONFIG_MMC_DW_K3=y
+CONFIG_PL011_SERIAL=y
+CONFIG_PSCI_RESET=y
+CONFIG_USB=y
+CONFIG_USB_EHCI=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_GENERIC=y
+CONFIG_USB_STORAGE=y
+CONFIG_NET=y
+# CONFIG_CMD_IMLS is not set
+# CONFIG_DM_GPIO is not set
+CONFIG_LIB_RAND=y
+CONFIG_CMD_UNZIP=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_USB=y
+
diff --git a/include/configs/poplar.h b/include/configs/poplar.h
new file mode 100644
index 0000000..55e05d6
--- /dev/null
+++ b/include/configs/poplar.h
@@ -0,0 +1,86 @@
+/*
+ * (C) Copyright 2017 Linaro
+ *
+ * Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
+ *
+ * Configuration for Poplar 96boards CE. Parts were derived from other ARM
+ * configurations.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _POPLAR_H_
+#define _POPLAR_H_
+
+#include <linux/sizes.h>
+
+/* DRAM banks */
+#define CONFIG_NR_DRAM_BANKS			2
+
+/* SYS */
+#define CONFIG_SYS_BOOTM_LEN			0x1400000
+#define CONFIG_SYS_INIT_SP_ADDR			0x200000
+#define CONFIG_SYS_LOAD_ADDR			0x800000
+#define CONFIG_SYS_MALLOC_LEN			SZ_32M
+
+/* ATF bl33.bin load address (must match) */
+#define CONFIG_SYS_TEXT_BASE			0x37000000
+
+/* PL010/PL011 */
+#define CONFIG_PL01X_SERIAL
+
+/* USB configuration */
+#define CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS	3
+#define CONFIG_USB_MAX_CONTROLLER_COUNT		2
+#define CONFIG_SYS_USB_EVENT_POLL
+#define CONFIG_USB_HOST_ETHER
+#define CONFIG_USB_ETHER_ASIX
+
+/* SD/MMC */
+#define CONFIG_BOUNCE_BUFFER
+
+/*****************************************************************************
+ *  Initial environment variables
+ *****************************************************************************/
+
+#define BOOT_TARGET_DEVICES(func)					\
+					func(USB, usb, 0)		\
+					func(MMC, mmc, 0)		\
+					func(DHCP, dhcp, na)
+#ifndef CONFIG_SPL_BUILD
+#include <config_distro_defaults.h>
+#include <config_distro_bootcmd.h>
+#endif
+
+#define CONFIG_EXTRA_ENV_SETTINGS					\
+			"loader_mmc_blknum=0x0\0"			\
+			"loader_mmc_nblks=0x780\0"			\
+			"env_mmc_blknum=0x780\0"			\
+			"env_mmc_nblks=0x80\0"				\
+			"kernel_addr_r=0x30000000\0"			\
+			"pxefile_addr_r=0x32000000\0"			\
+			"scriptaddr=0x32000000\0"			\
+			"fdt_addr_r=0x32200000\0"			\
+			"fdtfile=hisilicon/hi3798cv200-poplar.dtb\0"	\
+			"ramdisk_addr_r=0x32400000\0"			\
+			BOOTENV
+
+
+/* Command line configuration */
+#define CONFIG_ENV_IS_IN_MMC		1
+#define CONFIG_SYS_MMC_ENV_DEV		0
+#define CONFIG_ENV_OFFSET		(0x780 * 512)	/* env_mmc_blknum */
+#define CONFIG_ENV_SIZE			0x10000	/* env_mmc_nblks bytes */
+#define CONFIG_FAT_WRITE
+#define CONFIG_ENV_VARS_UBOOT_CONFIG
+
+/* Monitor Command Prompt */
+#define CONFIG_CMDLINE_EDITING
+#define CONFIG_SYS_LONGHELP
+#define CONFIG_SYS_CBSIZE		512
+#define CONFIG_SYS_MAXARGS		64
+#define CONFIG_SYS_PBSIZE		(CONFIG_SYS_CBSIZE + \
+					sizeof(CONFIG_SYS_PROMPT) + 16)
+#define CONFIG_SYS_BARGSIZE		CONFIG_SYS_CBSIZE
+
+#endif /* _POPLAR_H_ */