arm: mvebu: add DB-88F6820-AMC board

This board is a plug in card for Marvell's switch system development
kits. Form-factor aside it is similar to the DB-88F6820-GP with the
following differences.
- TCLK is 200MHz
- SPI1 is used
- No SATA
- No MMC
- NAND flash

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>

include/configs/db-88f6820-amc.h

@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2014 Stefan Roese <sr@denx.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _CONFIG_DB_88F6820_AMC_H
+#define _CONFIG_DB_88F6820_AMC_H
+
+/*
+ * High Level Configuration Options (easy to change)
+ */
+
+#define CONFIG_DISPLAY_BOARDINFO_LATE
+
+/*
+ * TEXT_BASE needs to be below 16MiB, since this area is scrubbed
+ * for DDR ECC byte filling in the SPL before loading the main
+ * U-Boot into it.
+ */
+#define	CONFIG_SYS_TEXT_BASE	0x00800000
+#define CONFIG_SYS_TCLK		200000000	/* 200MHz */
+
+/*
+ * Commands configuration
+ */
+#define CONFIG_SYS_NO_FLASH		/* Declare no flash (NOR/SPI) */
+#define CONFIG_CMD_ENV
+#define CONFIG_CMD_PCI
+
+/* I2C */
+#define CONFIG_SYS_I2C
+#define CONFIG_SYS_I2C_MVTWSI
+#define CONFIG_I2C_MVTWSI_BASE0		MVEBU_TWSI_BASE
+#define CONFIG_SYS_I2C_SLAVE		0x0
+#define CONFIG_SYS_I2C_SPEED		100000
+
+/* SPI NOR flash default params, used by sf commands */
+#define CONFIG_SF_DEFAULT_BUS		1
+#define CONFIG_SF_DEFAULT_SPEED		1000000
+#define CONFIG_SF_DEFAULT_MODE		SPI_MODE_3
+
+/* Partition support */
+#define CONFIG_DOS_PARTITION
+#define CONFIG_EFI_PARTITION
+
+/* Additional FS support/configuration */
+#define CONFIG_SUPPORT_VFAT
+
+/* USB/EHCI configuration */
+#define CONFIG_EHCI_IS_TDI
+
+/* Environment in SPI NOR flash */
+#define CONFIG_ENV_IS_IN_SPI_FLASH
+#define CONFIG_ENV_SPI_BUS		1
+#define CONFIG_ENV_OFFSET		(1 << 20) /* 1MiB in */
+#define CONFIG_ENV_SIZE			(64 << 10) /* 64KiB */
+#define CONFIG_ENV_SECT_SIZE		(256 << 10) /* 256KiB sectors */
+
+#define CONFIG_PHY_MARVELL		/* there is a marvell phy */
+#define PHY_ANEG_TIMEOUT	8000	/* PHY needs a longer aneg time */
+
+/* PCIe support */
+#ifndef CONFIG_SPL_BUILD
+#define CONFIG_PCI
+#define CONFIG_PCI_MVEBU
+#define CONFIG_PCI_PNP
+#define CONFIG_PCI_SCAN_SHOW
+#endif
+
+#define CONFIG_SYS_CONSOLE_INFO_QUIET	/* don't print console @ startup */
+#define CONFIG_SYS_ALT_MEMTEST
+
+/* Keep device tree and initrd in lower memory so the kernel can access them */
+#define CONFIG_EXTRA_ENV_SETTINGS	\
+	"fdt_high=0x10000000\0"		\
+	"initrd_high=0x10000000\0"
+
+/* SPL */
+/*
+ * Select the boot device here
+ *
+ * Currently supported are:
+ * SPL_BOOT_SPI_NOR_FLASH	- Booting via SPI NOR flash
+ *
+ * MMC is not populated on this board.
+ * NAND support may be added in the future.
+ */
+#define SPL_BOOT_SPI_NOR_FLASH		1
+#define CONFIG_SPL_BOOT_DEVICE		SPL_BOOT_SPI_NOR_FLASH
+
+/* Defines for SPL */
+#define CONFIG_SPL_FRAMEWORK
+#define CONFIG_SPL_SIZE			(140 << 10)
+#define CONFIG_SPL_TEXT_BASE		0x40000030
+#define CONFIG_SPL_MAX_SIZE		(CONFIG_SPL_SIZE - 0x0030)
+
+#define CONFIG_SPL_BSS_START_ADDR	(0x40000000 + CONFIG_SPL_SIZE)
+#define CONFIG_SPL_BSS_MAX_SIZE		(16 << 10)
+
+#ifdef CONFIG_SPL_BUILD
+#define CONFIG_SYS_MALLOC_SIMPLE
+#endif
+
+#define CONFIG_SPL_STACK		(0x40000000 + ((192 - 16) << 10))
+#define CONFIG_SPL_BOOTROM_SAVE		(CONFIG_SPL_STACK + 4)
+
+#if CONFIG_SPL_BOOT_DEVICE == SPL_BOOT_SPI_NOR_FLASH
+/* SPL related SPI defines */
+#define CONFIG_SPL_SPI_LOAD
+#define CONFIG_SYS_SPI_U_BOOT_OFFS	0x24000
+#define CONFIG_SYS_U_BOOT_OFFS		CONFIG_SYS_SPI_U_BOOT_OFFS
+#endif
+
+/*
+ * mv-common.h should be defined after CMD configs since it used them
+ * to enable certain macros
+ */
+#include "mv-common.h"
+#undef CONFIG_SYS_MAXARGS
+#define CONFIG_SYS_MAXARGS 96
+
+#endif /* _CONFIG_DB_88F6820_AMC_H */