arm: ls102xa: Add SD boot support for LS1021ATWR board

This patch adds SD boot support for LS1021ATWR board. SPL
framework is used. PBL initialize the internal RAM and copy
SPL to it, then SPL initialize DDR using SPD and copy u-boot
from SD card to DDR, finally SPL transfer control to u-boot.

Signed-off-by: Chen Lu <chen.lu@freescale.com>
Signed-off-by: Alison Wang <alison.wang@freescale.com>
Signed-off-by: Jason Jin <jason.jin@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

board/freescale/ls1021atwr/MAINTAINERS

@@ -5,3 +5,4 @@ F:	board/freescale/ls1021atwr/
 F:	include/configs/ls1021atwr.h
 F:	configs/ls1021atwr_nor_defconfig
 F:	configs/ls1021atwr_nor_SECURE_BOOT_defconfig
+F:	configs/ls1021atwr_sdcard_defconfig

board/freescale/ls1021atwr/ls1021atwr.c

@@ -18,6 +18,7 @@
 #include <fsl_mdio.h>
 #include <tsec.h>
 #include <fsl_sec.h>
+#include <spl.h>
 #ifdef CONFIG_U_QE
 #include "../../../drivers/qe/qe.h"
 #endif
@@ -271,6 +272,25 @@ int board_early_init_f(void)
 	return 0;
 }
 
+#ifdef CONFIG_SPL_BUILD
+void board_init_f(ulong dummy)
+{
+	/* Set global data pointer */
+	gd = &gdata;
+
+	/* Clear the BSS */
+	memset(__bss_start, 0, __bss_end - __bss_start);
+
+	get_clocks();
+
+	preloader_console_init();
+
+	dram_init();
+
+	board_init_r(NULL, 0);
+}
+#endif
+
 int board_init(void)
 {
 	struct ccsr_cci400 *cci = (struct ccsr_cci400 *)CONFIG_SYS_CCI400_ADDR;

board/freescale/ls1021atwr/ls102xa_pbi.cfg

@@ -0,0 +1,12 @@
+#PBI commands
+
+09570200 ffffffff
+09570158 00000300
+8940007c 21f47300
+
+#Configure Scratch register
+09ee0200 10000000
+#Configure alternate space
+09570158 00001000
+#Flush PBL data
+096100c0 000FFFFF

board/freescale/ls1021atwr/ls102xa_rcw_sd.cfg

@@ -0,0 +1,14 @@
+#PBL preamble and RCW header
+aa55aa55 01ee0100
+
+#enable IFC, disable QSPI and DSPI
+0608000a 00000000 00000000 00000000
+20000000 00407900 60040a00 21046000
+00000000 00000000 00000000 00038000
+00080000 881b7340 00000000 00000000
+
+#disable IFC, enable QSPI and DSPI
+#0608000a 00000000 00000000 00000000
+#20000000 00407900 60040a00 21046000
+#00000000 00000000 00000000 00038000
+#20084800 881b7340 00000000 00000000

configs/ls1021atwr_sdcard_defconfig

@@ -0,0 +1,4 @@
+CONFIG_SPL=y
+CONFIG_SYS_EXTRA_OPTIONS="RAMBOOT_PBL,SPL_FSL_PBL,SD_BOOT"
++S:CONFIG_ARM=y
++S:CONFIG_TARGET_LS1021ATWR=y

include/configs/ls1021atwr.h

@@ -35,6 +35,38 @@
 #define CONFIG_SYS_CLK_FREQ		100000000
 #define CONFIG_DDR_CLK_FREQ		100000000
 
+#ifdef CONFIG_RAMBOOT_PBL
+#define CONFIG_SYS_FSL_PBL_PBI	board/freescale/ls1021atwr/ls102xa_pbi.cfg
+#endif
+
+#ifdef CONFIG_SD_BOOT
+#define CONFIG_SYS_FSL_PBL_RCW	board/freescale/ls1021atwr/ls102xa_rcw_sd.cfg
+#define CONFIG_SPL_FRAMEWORK
+#define CONFIG_SPL_LDSCRIPT	"arch/$(ARCH)/cpu/u-boot-spl.lds"
+#define CONFIG_SPL_LIBCOMMON_SUPPORT
+#define CONFIG_SPL_LIBGENERIC_SUPPORT
+#define CONFIG_SPL_ENV_SUPPORT
+#define CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT
+#define CONFIG_SPL_I2C_SUPPORT
+#define CONFIG_SPL_WATCHDOG_SUPPORT
+#define CONFIG_SPL_SERIAL_SUPPORT
+#define CONFIG_SPL_MMC_SUPPORT
+#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR		0xe8
+#define CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS		0x400
+
+#define CONFIG_SPL_TEXT_BASE		0x10000000
+#define CONFIG_SPL_MAX_SIZE		0x1a000
+#define CONFIG_SPL_STACK		0x1001d000
+#define CONFIG_SPL_PAD_TO		0x1c000
+#define CONFIG_SYS_TEXT_BASE		0x82000000
+
+#define CONFIG_SYS_SPL_MALLOC_START	0x80200000
+#define CONFIG_SYS_SPL_MALLOC_SIZE	0x100000
+#define CONFIG_SPL_BSS_START_ADDR	0x80100000
+#define CONFIG_SPL_BSS_MAX_SIZE		0x80000
+#define CONFIG_SYS_MONITOR_LEN		0x80000
+#endif
+
 #ifndef CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_TEXT_BASE		0x67f80000
 #endif
@@ -250,6 +282,7 @@
 
 #define CONFIG_CMDLINE_TAG
 #define CONFIG_CMDLINE_EDITING
+
 #define CONFIG_CMD_IMLS
 
 #define CONFIG_HWCONFIG
@@ -295,7 +328,11 @@
 #define CONFIG_SYS_INIT_SP_ADDR \
 	(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)
 
+#ifdef CONFIG_SPL_BUILD
+#define CONFIG_SYS_MONITOR_BASE CONFIG_SPL_TEXT_BASE
+#else
 #define CONFIG_SYS_MONITOR_BASE CONFIG_SYS_TEXT_BASE    /* start of monitor */
+#endif
 
 #define CONFIG_SYS_QE_FW_ADDR     0x67f40000
 
@@ -304,10 +341,17 @@
  */
 #define CONFIG_ENV_OVERWRITE
 
+#if defined(CONFIG_SD_BOOT)
+#define CONFIG_ENV_OFFSET		0x100000
+#define CONFIG_ENV_IS_IN_MMC
+#define CONFIG_SYS_MMC_ENV_DEV		0
+#define CONFIG_ENV_SIZE			0x20000
+#else
 #define CONFIG_ENV_IS_IN_FLASH
 #define CONFIG_ENV_ADDR		(CONFIG_SYS_MONITOR_BASE - CONFIG_ENV_SECT_SIZE)
 #define CONFIG_ENV_SIZE			0x20000
 #define CONFIG_ENV_SECT_SIZE		0x20000 /* 128K (one sector) */
+#endif
 
 #define CONFIG_OF_LIBFDT
 #define CONFIG_OF_BOARD_SETUP