zynq: add Bitmain Antminer S9 control board support

This board is the control board for the Antminer S9 miners.

SoC:     Xilinx XC7Z010 - dual-core Cortex-A9 with FPGA stack
Memory:  512Mb DDR3
NIC:     1Gbit ethernet (BCM B50612E PHY)
Flash:   256Mb NAND (Micron MT29F2G08ABAEAWP)
Storage: SD-card slot
Other:   control pins available via FPGA stack

Admittedly, there is a limited number of use cases available
for these boards outside of the miners and the lack of FPGA
tooling in OpenWrt. However, for one, they are easily and cheaply
available, for two, the reason for adding this is to provide an
easy addition to the boardfarm for continuous testing of this target.

Notes: For u-boot, an additional patch is required to support
  booting from SD-cards. This is because EXTRA_ENV_SETTINGS is
  already defined in the board's u-boot config, which is the same
  place where the zynq-common.dtsi defines the required envvars.

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>

package/boot/uboot-zynq/Makefile

@@ -30,6 +30,12 @@ define U-Boot/zc702
   BUILD_DEVICES:=xlnx_zynq-zc702
 endef
 
+define U-Boot/antminer-s9
+  NAME:=Bitmain Antminer S9 control board
+  BUILD_DEVICES:=bitmain_zynq-antminer-s9
+  UBOOT_CONFIG:=bitmain_antminer_s9
+endef
+
 define U-Boot/zed
   NAME:=Avnet Digilent ZedBoard Dev Board
   BUILD_DEVICES:=avnet_zynq-zed
@@ -46,6 +52,7 @@ define U-Boot/zybo_z7
 endef
 
 UBOOT_TARGETS := \
+        antminer-s9 \
 	zc702 \
 	zed \
 	zybo \

package/boot/uboot-zynq/patches/120-antminer-s9-restore-sdboot-capability.patch

@@ -0,0 +1,37 @@
+--- a/include/configs/bitmain_antminer_s9.h
++++ b/include/configs/bitmain_antminer_s9.h
+@@ -20,6 +20,34 @@
+ 	"initrd_high=0xefff000\0" \
+ 	"devnum=0\0" \
+ 	"wdstop=mw f8005000 ABC000\0" \
++	"scriptaddr=0x3000000\0"        \
++	"loadbootenv_addr=0x2000000\0" \
++	"fit_image=fit.itb\0"           \
++	"load_addr=0x2000000\0"         \
++	"bootenv=uEnv.txt\0" \
++	"bootenv_dev=mmc\0" \
++	"loadbootenv=load ${bootenv_dev} 0 ${loadbootenv_addr} ${bootenv}\0" \
++	"importbootenv=echo Importing environment from ${bootenv_dev} ...; " \
++	"env import -t ${loadbootenv_addr} $filesize\0" \
++	"bootenv_existence_test=test -e ${bootenv_dev} 0 /${bootenv}\0" \
++	"setbootenv=if env run bootenv_existence_test; then " \
++		"if env run loadbootenv; then " \
++			"env run importbootenv; " \
++		"fi; " \
++	"fi; \0" \
++	"sd_loadbootenv=setenv bootenv_dev mmc && " \
++		"run setbootenv \0" \
++		"preboot=if test $modeboot = sdboot; then " \
++			"run sd_loadbootenv; " \
++			"echo Checking if uenvcmd is set ...; " \
++			"if test -n $uenvcmd; then " \
++				"echo Running uenvcmd ...; " \
++				"run uenvcmd; " \
++			"fi; " \
++		"fi; \0" \
++	"sdboot=echo Copying FIT from SD to RAM... && " \
++		"load mmc 0 ${load_addr} ${fit_image} && " \
++		"bootm ${load_addr}\0" \
+ 	BOOTENV
+ 
+ #include <configs/zynq-common.h>

target/linux/zynq/base-files/etc/board.d/02_network

@@ -6,6 +6,7 @@ board_config_update
 
 case "$(board_name)" in
 avnet,zynq-zed | \
+bitmain,antminer-s9 | \
 digilent,zynq-zybo | \
 digilent,zynq-zybo-z7 | \
 xlnx,zynq-zc702)

target/linux/zynq/image/Makefile

@@ -54,6 +54,13 @@ define Device/avnet_zynq-zed
 endef
 TARGET_DEVICES += avnet_zynq-zed
 
+define Device/bitmain_zynq-antminer-s9
+	$(call Device/FitImageGzip)
+	DEVICE_VENDOR := Bitmain
+	DEVICE_MODEL := Antminer S9 control board
+endef
+TARGET_DEVICES += bitmain_zynq-antminer-s9
+
 define Device/digilent_zynq-zybo
 	$(call Device/FitImageGzip)
 	DEVICE_VENDOR := Digilent

target/linux/zynq/patches/0001-dts-add-antminer-s9.patch

@@ -0,0 +1,102 @@
+--- a/arch/arm/boot/dts/xilinx/Makefile
++++ b/arch/arm/boot/dts/xilinx/Makefile
+@@ -1,5 +1,6 @@
+ # SPDX-License-Identifier: GPL-2.0
+ dtb-$(CONFIG_ARCH_ZYNQ) += \
++	zynq-antminer-s9.dtb \
+ 	zynq-cc108.dtb \
+ 	zynq-ebaz4205.dtb \
+ 	zynq-microzed.dtb \
+--- /dev/null
++++ b/arch/arm/boot/dts/xilinx/zynq-antminer-s9.dts
+@@ -0,0 +1,90 @@
++// SPDX-License-Identifier: GPL-2.0
++/*
++ *  Copyright (C) 2011 - 2014 Xilinx
++ *  Copyright (C) 2012 National Instruments Corp.
++ */
++/dts-v1/;
++#include "zynq-7000.dtsi"
++
++/ {
++	model = "Bitmain Antminer S9 control board";
++	compatible = "bitmain,antminer-s9", "xlnx,zynq-7000";
++
++	aliases {
++		ethernet0 = &gem0;
++		serial0 = &uart1;
++		mmc0 = &sdhci0;
++	};
++
++	memory@0 {
++		device_type = "memory";
++		reg = <0x0 0x20000000>;
++	};
++
++	chosen {
++		bootargs = "";
++		stdout-path = "serial0:115200n8";
++	};
++
++	usb_phy0: phy0 {
++		compatible = "usb-nop-xceiv";
++		#phy-cells = <0>;
++	};
++
++	gpio-leds {
++		compatible = "gpio-leds";
++
++		led_red {
++			label = "s9:red:usr";
++			gpios = <&gpio0 37 0x0>;
++			default-state = "off";
++		};
++
++		led_green {
++			label = "s9:green:usr";
++			gpios = <&gpio0 38 0x0>;
++			default-state = "off";
++		};
++	};
++};
++
++&clkc {
++	ps-clk-frequency = <33333333>;
++};
++
++&gem0 {
++	status = "okay";
++	phy-mode = "rgmii-id";
++	phy-handle = <&ethernet_phy>;
++
++	ethernet_phy: ethernet-phy@1 {
++		reg = <1>;
++		device_type = "ethernet-phy";
++	};
++};
++
++&nfc0 {
++	status = "okay";
++
++	nand@0 {
++		reg = <0>;
++	};
++};
++
++&sdhci0 {
++	status = "okay";
++};
++
++&smcc {
++	status = "okay";
++};
++
++&uart1 {
++	status = "okay";
++};
++
++&usb0 {
++	status = "okay";
++	dr_mode = "host";
++	usb-phy = <&usb_phy0>;
++};

target/linux/zynq/patches/0002-dts-antminer-s9-led-aliases.patch

@@ -0,0 +1,23 @@
+--- a/arch/arm/boot/dts/xilinx/zynq-antminer-s9.dts
++++ b/arch/arm/boot/dts/xilinx/zynq-antminer-s9.dts
+@@ -14,6 +14,11 @@
+ 		ethernet0 = &gem0;
+ 		serial0 = &uart1;
+ 		mmc0 = &sdhci0;
++
++		led-boot = &led_green;
++		led-failsafe = &led_green;
++		led-running = &led_green;
++		led-upgrade = &led_green;
+ 	};
+ 
+ 	memory@0 {
+@@ -40,7 +45,7 @@
+ 			default-state = "off";
+ 		};
+ 
+-		led_green {
++		led_green: led_green {
+ 			label = "s9:green:usr";
+ 			gpios = <&gpio0 38 0x0>;
+ 			default-state = "off";