arm: maxbcm: Enable SPL to include DDR training code into U-Boot

This patch adds SPL support to the maxbcm MV78460 based board. Including
the fixed DDR configuratrion needed for the DDR training code. And the
the serdes PHY init code.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Luka Perkov <luka.perkov@sartura.hr>

arch/arm/Kconfig

@@ -240,6 +240,7 @@ config TARGET_DB_MV784MP_GP
 config TARGET_MAXBCM
 	bool "Support maxbcm"
 	select CPU_V7
+	select SUPPORT_SPL
 
 config TARGET_DEVKIT3250
 	bool "Support devkit3250"

arch/arm/include/asm/arch-armada-xp/cpu.h

@@ -96,6 +96,9 @@ struct kwgpio_registers {
 	u32 irq_level;
 };
 
+/* Needed for dynamic (board-specific) mbus configuration */
+extern struct mvebu_mbus_state mbus_state;
+
 /*
  * functions
  */

board/maxbcm/kwbimage.cfg

@@ -9,4 +9,4 @@ VERSION		1
 BOOT_FROM	spi
 
 # Binary Header (bin_hdr) with DDR3 training code
-BINARY board/maxbcm/binary.0 0000005b 00000068
+BINARY spl/u-boot-spl.bin 0000005b 00000068

board/maxbcm/maxbcm.c

@@ -11,6 +11,9 @@
 #include <asm/arch/soc.h>
 #include <linux/mbus.h>
 
+#include "../drivers/ddr/mvebu/ddr3_hw_training.h"
+#include "../arch/arm/mvebu-common/serdes/high_speed_env_spec.h"
+
 DECLARE_GLOBAL_DATA_PTR;
 
 /* Base addresses for the external device chip selects */
@@ -19,8 +22,84 @@ DECLARE_GLOBAL_DATA_PTR;
 #define DEV_CS2_BASE		0xe2000000
 #define DEV_CS3_BASE		0xe3000000
 
-/* Needed for dynamic (board-specific) mbus configuration */
-extern struct mvebu_mbus_state mbus_state;
+/* DDR3 static configuration */
+MV_DRAM_MC_INIT ddr3_b0_maxbcm[MV_MAX_DDR3_STATIC_SIZE] = {
+	{0x00001400, 0x7301CC30},	/* DDR SDRAM Configuration Register */
+	{0x00001404, 0x30000820},	/* Dunit Control Low Register */
+	{0x00001408, 0x5515BAAB},	/* DDR SDRAM Timing (Low) Register */
+	{0x0000140C, 0x38DA3F97},	/* DDR SDRAM Timing (High) Register */
+	{0x00001410, 0x20100005},	/* DDR SDRAM Address Control Register */
+	{0x00001414, 0x0000F3FF},	/* DDR SDRAM Open Pages Control Reg */
+	{0x00001418, 0x00000e00},	/* DDR SDRAM Operation Register */
+	{0x0000141C, 0x00000672},	/* DDR SDRAM Mode Register */
+	{0x00001420, 0x00000004},	/* DDR SDRAM Extended Mode Register */
+	{0x00001424, 0x0000F3FF},	/* Dunit Control High Register */
+	{0x00001428, 0x0011A940},	/* Dunit Control High Register */
+	{0x0000142C, 0x014C5134},	/* Dunit Control High Register */
+	{0x0000147C, 0x0000D771},
+
+	{0x00001494, 0x00010000},	/* DDR SDRAM ODT Control (Low) Reg */
+	{0x0000149C, 0x00000001},	/* DDR Dunit ODT Control Register */
+	{0x000014A0, 0x00000001},
+	{0x000014A8, 0x00000101},
+
+	/* Recommended Settings from Marvell for 4 x 16 bit devices: */
+	{0x000014C0, 0x192424C9},	/* DRAM addr and Ctrl Driving Strenght*/
+	{0x000014C4, 0xAAA24C9},	/* DRAM Data and DQS Driving Strenght */
+
+	/*
+	 * DO NOT Modify - Open Mbus Window - 2G - Mbus is required for the
+	 * training sequence
+	 */
+	{0x000200e8, 0x3FFF0E01},
+	{0x00020184, 0x3FFFFFE0},	/* Close fast path Window to - 2G */
+
+	{0x0001504, 0x3FFFFFE1},	/* CS0 Size */
+	{0x000150C, 0x00000000},	/* CS1 Size */
+	{0x0001514, 0x00000000},	/* CS2 Size */
+	{0x000151C, 0x00000000},	/* CS3 Size */
+
+	{0x0020220, 0x00000007},	/* Reserved */
+
+	{0x00001538, 0x0000000B},	/* Read Data Sample Delays Register */
+	{0x0000153C, 0x0000000B},	/* Read Data Ready Delay Register */
+
+	{0x000015D0, 0x00000670},	/* MR0 */
+	{0x000015D4, 0x00000044},	/* MR1 */
+	{0x000015D8, 0x00000018},	/* MR2 */
+	{0x000015DC, 0x00000000},	/* MR3 */
+	{0x000015E0, 0x00000001},
+	{0x000015E4, 0x00203c18},	/* ZQDS Configuration Register */
+	{0x000015EC, 0xF800A225},	/* DDR PHY */
+
+	{0x0, 0x0}
+};
+
+MV_DRAM_MODES maxbcm_ddr_modes[MV_DDR3_MODES_NUMBER] = {
+	{"maxbcm_1600-800", 0xB, 0x5, 0x0, A0, ddr3_b0_maxbcm,  NULL},
+};
+
+extern MV_SERDES_CHANGE_M_PHY serdes_change_m_phy[];
+
+/* MAXBCM: SERDES 0-4 PCIE, Serdes 7 = SGMII 0, all others =  unconnected */
+MV_BIN_SERDES_CFG maxbcm_serdes_cfg[] = {
+	{ MV_PEX_ROOT_COMPLEX, 0x20011111, 0x00000000,
+	  { PEX_BUS_MODE_X1, PEX_BUS_MODE_X1, PEX_BUS_DISABLED,
+	    PEX_BUS_DISABLED },
+	  0x1f, serdes_change_m_phy
+	}
+};
+
+MV_DRAM_MODES *ddr3_get_static_ddr_mode(void)
+{
+	/* Only one mode supported for this board */
+	return &maxbcm_ddr_modes[0];
+}
+
+MV_BIN_SERDES_CFG *board_serdes_cfg_get(u8 pex_mode)
+{
+	return &maxbcm_serdes_cfg[0];
+}
 
 int board_early_init_f(void)
 {

configs/maxbcm_defconfig

-CONFIG_ARM=y
-CONFIG_TARGET_MAXBCM=y
+CONFIG_SPL=y
++S:CONFIG_ARM=y
++S:CONFIG_TARGET_MAXBCM=y

include/configs/maxbcm.h

@@ -65,4 +65,51 @@
  */
 #include "mv-common.h"
 
+/*
+ * Memory layout while starting into the bin_hdr via the
+ * BootROM:
+ *
+ * 0x4000.4000 - 0x4003.4000	headers space (192KiB)
+ * 0x4000.4030			bin_hdr start address
+ * 0x4003.4000 - 0x4004.7c00	BootROM memory allocations (15KiB)
+ * 0x4007.fffc			BootROM stack top
+ *
+ * The address space between 0x4007.fffc and 0x400f.fff is not locked in
+ * L2 cache thus cannot be used.
+ */
+
+/* SPL */
+/* Defines for SPL */
+#define CONFIG_SPL_FRAMEWORK
+#define CONFIG_SPL_TEXT_BASE		0x40004030
+#define CONFIG_SPL_MAX_SIZE		((128 << 10) - 0x4030)
+
+#define CONFIG_SPL_BSS_START_ADDR	(0x40000000 + (128 << 10))
+#define CONFIG_SPL_BSS_MAX_SIZE		(16 << 10)
+
+#define CONFIG_SYS_SPL_MALLOC_START	(CONFIG_SPL_BSS_START_ADDR + \
+					 CONFIG_SPL_BSS_MAX_SIZE)
+#define CONFIG_SYS_SPL_MALLOC_SIZE	(16 << 10)
+
+#define CONFIG_SPL_STACK		(0x40000000 + ((192 - 16) << 10))
+#define CONFIG_SPL_BOOTROM_SAVE		(CONFIG_SPL_STACK + 4)
+
+#define CONFIG_SPL_LIBCOMMON_SUPPORT
+#define CONFIG_SPL_LIBGENERIC_SUPPORT
+#define CONFIG_SPL_SERIAL_SUPPORT
+#define CONFIG_SPL_I2C_SUPPORT
+#define CONFIG_SPL_LDSCRIPT		"arch/arm/mvebu-common/u-boot-spl.lds"
+
+/* SPL related SPI defines */
+#define CONFIG_SPL_SPI_SUPPORT
+#define CONFIG_SPL_SPI_FLASH_SUPPORT
+#define CONFIG_SPL_SPI_LOAD
+#define CONFIG_SPL_SPI_BUS		0
+#define CONFIG_SPL_SPI_CS		0
+#define CONFIG_SYS_SPI_U_BOOT_OFFS	0x20000
+
+/* Enable DDR support in SPL (DDR3 training from Marvell bin_hdr) */
+#define CONFIG_SYS_MVEBU_DDR
+#define CONFIG_DDR_FIXED_SIZE		(1 << 20)	/* 1GiB */
+
 #endif /* _CONFIG_DB_MV7846MP_GP_H */