arm64: mvebu: Add basic support for the Turris Mox board

This adds basic support for the Turris Mox board from CZ.NIC, which is
currently being crowdfunded on Indiegogo.

Turris Mox is as modular router based on the Armada 3720 SOC (same as
EspressoBin).

The basic module can be extended by different modules. The device tree
binary for the kernel can be dependent on which modules are connected,
and in what order. Because of this, the board specific code creates
in U-Boot a variable called module_topology, which carries this
information.

Signed-off-by: Marek Behun <marek.behun@nic.cz>
Signed-off-by: Stefan Roese <sr@denx.de>

arch/arm/dts/Makefile

@@ -87,6 +87,7 @@ dtb-$(CONFIG_TEGRA) += tegra20-harmony.dtb \
 dtb-$(CONFIG_ARCH_MVEBU) +=			\
 	armada-3720-db.dtb			\
 	armada-3720-espressobin.dtb		\
+	armada-3720-turris-mox.dtb		\
 	armada-375-db.dtb			\
 	armada-388-clearfog.dtb			\
 	armada-388-gp.dtb			\

arch/arm/dts/armada-3720-turris-mox.dts

@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: GPL-2.0+ or X11
+/*
+ * Device Tree file for CZ.NIC Turris Mox Board
+ * 2018 by Marek Behun <marek.behun@nic.cz>
+ *
+ * Based on armada-3720-espressobin.dts by:
+ *   Gregory CLEMENT <gregory.clement@free-electrons.com>
+ *   Konstantin Porotchkin <kostap@marvell.com>
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include "armada-372x.dtsi"
+
+/ {
+	model = "CZ.NIC Turris Mox Board";
+	compatible = "cznic,turris-mox", "marvell,armada3720",
+		     "marvell,armada3710";
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	aliases {
+		ethernet0 = &eth0;
+		i2c0 = &i2c0;
+		spi0 = &spi0;
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x00000000 0x00000000 0x00000000 0x20000000>;
+	};
+
+	reg_usb3_vbus: usb3_vbus@0 {
+		compatible = "regulator-fixed";
+		regulator-name = "usb3-vbus";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		shutdown-delay-us = <1000000>;
+		gpio = <&gpiosb 0 GPIO_ACTIVE_HIGH>;
+		regulator-boot-on;
+	};
+
+	mdio {
+		eth_phy1: ethernet-phy@1 {
+			reg = <1>;
+		};
+	};
+};
+
+&comphy {
+	max-lanes = <3>;
+	phy0 {
+		phy-type = <PHY_TYPE_SGMII1>;
+		phy-speed = <PHY_SPEED_3_125G>;
+	};
+
+	phy1 {
+		phy-type = <PHY_TYPE_PEX0>;
+		phy-speed = <PHY_SPEED_2_5G>;
+	};
+
+	phy2 {
+		phy-type = <PHY_TYPE_USB3_HOST0>;
+		phy-speed = <PHY_SPEED_5G>;
+	};
+};
+
+&eth0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&rgmii_pins>, <&smi_pins>;
+	phy-mode = "rgmii";
+	phy = <&eth_phy1>;
+};
+
+&i2c0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c1_pins>;
+	status = "okay";
+};
+
+&sdhci1 {
+	bus-width = <4>;
+	status = "okay";
+};
+
+&pinctrl_nb {
+	spi_cs1_pins: spi-cs1-pins {
+		groups = "spi_cs1";
+		function = "spi";
+	};
+};
+
+&pinctrl_sb {
+	smi_pins: smi-pins {
+		groups = "smi";
+		function = "smi";
+	};
+};
+
+&spi0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi_cs1_pins>;
+
+	spi-flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "st,s25fl064l", "spi-flash";
+		reg = <0>;
+		spi-max-frequency = <20000000>;
+		m25p,fast-read;
+	};
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart1_pins>;
+	status = "okay";
+};
+
+&usb2 {
+	status = "okay";
+};
+
+&usb3 {
+	vbus-supply = <&reg_usb3_vbus>;
+	status = "okay";
+};

arch/arm/mach-mvebu/Kconfig

@@ -96,6 +96,10 @@ config TARGET_TURRIS_OMNIA
 	bool "Support Turris Omnia"
 	select 88F6820
 
+config TARGET_TURRIS_MOX
+	bool "Support Turris Mox"
+	select ARMADA_3700
+
 config TARGET_MVEBU_ARMADA_8K
 	bool "Support Armada 7k/8k platforms"
 	select ARMADA_8K
@@ -133,6 +137,7 @@ config SYS_BOARD
 	default "db-88f6820-gp" if TARGET_DB_88F6820_GP
 	default "db-88f6820-amc" if TARGET_DB_88F6820_AMC
 	default "turris_omnia" if TARGET_TURRIS_OMNIA
+	default "turris_mox" if TARGET_TURRIS_MOX
 	default "mvebu_armada-8k" if TARGET_MVEBU_ARMADA_8K
 	default "db-mv784mp-gp" if TARGET_DB_MV784MP_GP
 	default "ds414" if TARGET_DS414
@@ -151,6 +156,7 @@ config SYS_CONFIG_NAME
 	default "maxbcm" if TARGET_MAXBCM
 	default "theadorable" if TARGET_THEADORABLE
 	default "turris_omnia" if TARGET_TURRIS_OMNIA
+	default "turris_mox" if TARGET_TURRIS_MOX
 
 config SYS_VENDOR
 	default "Marvell" if TARGET_DB_MV784MP_GP
@@ -162,6 +168,7 @@ config SYS_VENDOR
 	default "solidrun" if TARGET_CLEARFOG
 	default "Synology" if TARGET_DS414
 	default "CZ.NIC" if TARGET_TURRIS_OMNIA
+	default "CZ.NIC" if TARGET_TURRIS_MOX
 
 config SYS_SOC
 	default "mvebu"

arch/arm/mach-mvebu/Makefile

@@ -7,7 +7,7 @@ ifdef CONFIG_ARM64
 obj-$(CONFIG_ARMADA_3700) += armada3700/
 obj-$(CONFIG_ARMADA_8K) += armada8k/
 obj-y += arm64-common.o
-obj-y += sata.o
+obj-$(CONFIG_AHCI) += sata.o
 
 else # CONFIG_ARM64
 

board/CZ.NIC/turris_mox/MAINTAINERS

@@ -0,0 +1,6 @@
+TURRIS OMNIA BOARD
+M:	Marek Behún <marek.behun@nic.cz>
+S:	Maintained
+F:	board/CZ.NIC/turris_mox/
+F:	include/configs/turris_mox.h
+F:	configs/turris_mox_defconfig

board/CZ.NIC/turris_mox/Makefile

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2018 Marek Behun <marek.behun@nic.cz>
+
+obj-y	:= turris_mox.o

board/CZ.NIC/turris_mox/turris_mox.c

@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Marek Behun <marek.behun@nic.cz>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <clk.h>
+#include <spi.h>
+#include <linux/string.h>
+
+#ifdef CONFIG_WDT_ARMADA_3720
+#include <wdt.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_WDT_ARMADA_3720
+static struct udevice *watchdog_dev;
+
+void watchdog_reset(void)
+{
+	static ulong next_reset;
+	ulong now;
+
+	if (!watchdog_dev)
+		return;
+
+	now = timer_get_us();
+
+	/* Do not reset the watchdog too often */
+	if (now > next_reset) {
+		wdt_reset(watchdog_dev);
+		next_reset = now + 100000;
+	}
+}
+#endif
+
+int board_init(void)
+{
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
+
+#ifdef CONFIG_WDT_ARMADA_3720
+	if (uclass_get_device(UCLASS_WDT, 0, &watchdog_dev)) {
+		printf("Cannot find Armada 3720 watchdog!\n");
+	} else {
+		printf("Enabling Armada 3720 watchdog (3 minutes timeout).\n");
+		wdt_start(watchdog_dev, 180000, 0);
+	}
+#endif
+
+	return 0;
+}
+
+int last_stage_init(void)
+{
+	struct spi_slave *slave;
+	struct udevice *dev;
+	u8 din[10], dout[10];
+	int ret, i;
+	size_t len = 0;
+	char module_topology[128];
+
+	ret = spi_get_bus_and_cs(0, 1, 20000000, SPI_CPHA, "spi_generic_drv",
+				 "mox-modules@1", &dev, &slave);
+	if (ret)
+		goto fail;
+
+	ret = spi_claim_bus(slave);
+	if (ret)
+		goto fail_free;
+
+	memset(din, 0, 10);
+	memset(dout, 0, 10);
+
+	ret = spi_xfer(slave, 80, dout, din, SPI_XFER_ONCE);
+	if (ret)
+		goto fail_release;
+
+	if (din[0] != 0x00 && din[0] != 0xff)
+		goto fail_release;
+
+	printf("Module Topology:\n");
+	for (i = 1; i < 10 && din[i] != 0xff; ++i) {
+		u8 mid = din[i] & 0xf;
+		size_t mlen;
+		const char *mname = "";
+
+		switch (mid) {
+		case 0x1:
+			mname = "sfp-";
+			printf("% 4i: SFP Module\n", i);
+			break;
+		case 0x2:
+			mname = "pci-";
+			printf("% 4i: Mini-PCIe Module\n", i);
+			break;
+		case 0x3:
+			mname = "topaz-";
+			printf("% 4i: Topaz Switch Module\n", i);
+			break;
+		default:
+			printf("% 4i: unknown (ID %i)\n", i, mid);
+		}
+
+		mlen = strlen(mname);
+		if (len + mlen < sizeof(module_topology)) {
+			strcpy(module_topology + len, mname);
+			len += mlen;
+		}
+	}
+	printf("\n");
+
+	module_topology[len > 0 ? len - 1 : 0] = '\0';
+
+	env_set("module_topology", module_topology);
+
+fail_release:
+	spi_release_bus(slave);
+fail_free:
+	spi_free_slave(slave);
+fail:
+	if (ret)
+		printf("Cannot read module topology!\n");
+	return ret;
+}

configs/turris_mox_defconfig

@@ -0,0 +1,76 @@
+CONFIG_ARM=y
+CONFIG_ARCH_MVEBU=y
+CONFIG_SYS_TEXT_BASE=0x00000000
+CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_TARGET_TURRIS_MOX=y
+CONFIG_DEFAULT_DEVICE_TREE="armada-3720-turris-mox"
+CONFIG_DEBUG_UART=y
+CONFIG_DISTRO_DEFAULTS=y
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_SYS_CONSOLE_INFO_QUIET=y
+# CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_ARCH_EARLY_INIT_R=y
+# CONFIG_CMD_FLASH is not set
+CONFIG_CMD_CLK=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+CONFIG_CMD_USB=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_TFTPPUT=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_TIME=y
+CONFIG_CMD_MVEBU_BUBT=y
+CONFIG_CMD_BTRFS=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_MAC_PARTITION=y
+CONFIG_ENV_IS_IN_SPI_FLASH=y
+CONFIG_BLOCK_CACHE=y
+CONFIG_DM_I2C=y
+CONFIG_MISC=y
+CONFIG_CLK=y
+CONFIG_CLK_MVEBU=y
+CONFIG_CLK_ARMADA_3720=y
+CONFIG_DM_MMC=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_SDMA=y
+CONFIG_MMC_SDHCI_XENON=y
+CONFIG_WDT=y
+CONFIG_WDT_ARMADA_37XX=y
+CONFIG_DM_GPIO=y
+# CONFIG_MVEBU_GPIO is not set
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_GENERIC=y
+CONFIG_PINMUX=y
+CONFIG_PINCTRL_ARMADA_37XX=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_PHYLIB=y
+CONFIG_PHY_GIGE=y
+CONFIG_MVNETA=y
+CONFIG_MVEBU_COMPHY_SUPPORT=y
+# CONFIG_SPL_SERIAL_PRESENT is not set
+CONFIG_DEBUG_MVEBU_A3700_UART=y
+CONFIG_DEBUG_UART_BASE=0xd0012000
+CONFIG_DEBUG_UART_CLOCK=25804800
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_DEBUG_UART_ANNOUNCE=y
+CONFIG_MVEBU_A3700_UART=y
+CONFIG_MVEBU_A3700_SPI=y
+CONFIG_USB=y
+CONFIG_DM_USB=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_STORAGE=y
+CONFIG_USB_HOST_ETHER=y
+CONFIG_USB_ETHER_ASIX=y
+CONFIG_USB_ETHER_MCS7830=y
+CONFIG_USB_ETHER_RTL8152=y
+CONFIG_USB_ETHER_SMSC95XX=y
+CONFIG_SHA1=y
+CONFIG_SHA256=y

include/configs/turris_mox.h

@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2018 Marek Behun <marek.behun@nic.cz>
+ *
+ * Based on mvebu_armada-37xx.h by Stefan Roese <sr@denx.de>
+ */
+
+#ifndef _CONFIG_TURRIS_MOX_H
+#define _CONFIG_TURRIS_MOX_H
+
+#define CONFIG_LAST_STAGE_INIT
+
+/*
+ * High Level Configuration Options (easy to change)
+ */
+#define CONFIG_DISPLAY_BOARDINFO_LATE
+
+/* additions for new ARM relocation support */
+#define CONFIG_SYS_SDRAM_BASE	0x00000000
+
+#define CONFIG_NR_DRAM_BANKS	1
+
+/* auto boot */
+#define CONFIG_PREBOOT
+
+#define CONFIG_SYS_BAUDRATE_TABLE	{ 9600, 19200, 38400, 57600, \
+					  115200, 230400, 460800, 921600 }
+
+/*
+ * For booting Linux, the board info and command line data
+ * have to be in the first 8 MB of memory, since this is
+ * the maximum mapped by the Linux kernel during initialization.
+ */
+#define CONFIG_CMDLINE_TAG		/* enable passing of ATAGs  */
+#define CONFIG_INITRD_TAG		/* enable INITRD tag */
+#define CONFIG_SETUP_MEMORY_TAGS	/* enable memory tag */
+
+#define	CONFIG_SYS_CBSIZE	1024	/* Console I/O Buff Size */
+
+/*
+ * Size of malloc() pool
+ */
+#define CONFIG_SYS_MALLOC_LEN	(4 << 20) /* 4MiB for malloc() */
+
+/*
+ * Other required minimal configurations
+ */
+#define CONFIG_ARCH_CPU_INIT		/* call arch_cpu_init() */
+#define CONFIG_SYS_LOAD_ADDR	0x00800000	/* default load adr- 8M */
+#define CONFIG_SYS_MEMTEST_START 0x00800000	/* 8M */
+#define CONFIG_SYS_MEMTEST_END	0x00ffffff	/*(_16M -1) */
+#define CONFIG_SYS_RESET_ADDRESS 0xffff0000	/* Rst Vector Adr */
+#define CONFIG_SYS_MAXARGS	32	/* max number of command args */
+
+#define CONFIG_SYS_ALT_MEMTEST
+
+/* End of 16M scrubbed by training in bootrom */
+#define CONFIG_SYS_INIT_SP_ADDR         (CONFIG_SYS_TEXT_BASE + 0xFF0000)
+
+/*
+ * I2C
+ */
+#define CONFIG_I2C_MV
+#define CONFIG_SYS_I2C_SLAVE		0x0
+
+/*
+ * SPI Flash configuration
+ */
+#define CONFIG_ENV_SPI_BUS		0
+#define CONFIG_ENV_SPI_CS		0
+
+/* SPI NOR flash default params, used by sf commands */
+#define CONFIG_SF_DEFAULT_SPEED		20000000
+#define CONFIG_SF_DEFAULT_MODE		SPI_MODE_0
+#define CONFIG_ENV_SPI_MODE		CONFIG_SF_DEFAULT_MODE
+
+/* Environment in SPI NOR flash */
+#define CONFIG_ENV_OFFSET		0x180000 /* as Marvell U-Boot version */
+#define CONFIG_ENV_SIZE			(64 << 10) /* 64KiB */
+#define CONFIG_ENV_SECT_SIZE		(64 << 10) /* 64KiB sectors */
+
+/*
+ * Ethernet Driver configuration
+ */
+#define CONFIG_ENV_OVERWRITE	/* ethaddr can be reprogrammed */
+#define CONFIG_ARP_TIMEOUT	200
+#define CONFIG_NET_RETRY_COUNT	50
+#define CONFIG_PHY_MARVELL
+
+#define CONFIG_USB_MAX_CONTROLLER_COUNT (3 + 3)
+
+#define BOOT_TARGET_DEVICES(func) \
+	func(MMC, mmc, 0) \
+	func(USB, usb, 0) \
+	func(PXE, pxe, na) \
+	func(DHCP, dhcp, na)
+
+#include <config_distro_bootcmd.h>
+
+#define CONFIG_EXTRA_ENV_SETTINGS	\
+	"scriptaddr=0x4d00000\0"	\
+	"pxefile_addr_r=0x4e00000\0"	\
+	"fdt_addr_r=0x4f00000\0"	\
+	"kernel_addr_r=0x5000000\0"	\
+	"ramdisk_addr_r=0x8000000\0"	\
+	BOOTENV
+
+#endif /* _CONFIG_TURRIS_MOX_H */