board/t208xrdb: Add support of 2-stage NAND/SPI/SD boot

Add support of 2-stage NAND/SPI/SD boot loader using SPL framework.
PBL initializes the internal CPC-SRAM and copy SPL(160K) to it,
SPL further initializes DDR using SPD and environment and copy
u-boot(768K) from SPI/SD/NAND to DDR, finally SPL transfers control
to u-boot.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

5 files changed, 188 insertions, 16 deletions

diff --git a/board/freescale/t208xrdb/Makefile b/board/freescale/t208xrdb/Makefile
index 092c9ff0dc..9605f8b606 100644
--- a/board/freescale/t208xrdb/Makefile
+++ b/board/freescale/t208xrdb/Makefile
@@ -4,10 +4,15 @@
 # SPDX-License-Identifier:      GPL-2.0+
 #
 
+ifdef CONFIG_SPL_BUILD
+obj-y += spl.o
+else
 obj-$(CONFIG_T2080RDB) += t208xrdb.o
 obj-$(CONFIG_T2080RDB) += eth_t208xrdb.o
 obj-$(CONFIG_T2080RDB) += cpld.o
 obj-$(CONFIG_PCI)      += pci.o
+endif
+
 obj-y   += ddr.o
 obj-y   += law.o
 obj-y   += tlb.o
diff --git a/board/freescale/t208xrdb/README b/board/freescale/t208xrdb/README
index 0012c6cb40..fe26de55c0 100644
--- a/board/freescale/t208xrdb/README
+++ b/board/freescale/t208xrdb/README
@@ -120,7 +120,7 @@ Start Address   End Address	Definition			Max size
 0xEBF00000	0xEBF1FFFF	FMAN ucode (alt bank)		128KB
 0xEBE00000	0xEBE3FFFF	PHY CS4315 firmware (alt bank)	256KB
 0xE9300000	0xEBEFFFFF	rootfs (current bank)		44MB
-0xE8800000	0xE88FFFFF	Hardware device tree (cur bank)	11MB + 512KB
+0xE8800000	0xE88FFFFF	Hardware device tree (cur bank)	1MB
 0xE8020000	0xE86FFFFF	Linux.uImage (current bank)	7MB + 875KB
 0xE8000000	0xE801FFFF	RCW (current bank)		128KB
 
@@ -146,7 +146,8 @@ Software configurations and board settings
 ------------------------------------------
 1. NOR boot:
    a. build NOR boot image
-	$ make T2080RDB
+	$ make T2080RDB_config
+	$ make
    b. program u-boot.bin image to NOR flash
 	=> tftp 1000000 u-boot.bin
 	=> pro off all;era eff40000 efffffff;cp.b 1000000 eff40000 $filesize
@@ -164,9 +165,9 @@ Software configurations and board settings
 2. NAND Boot:
    a. build PBL image for NAND boot
 	$ make T2080RDB_NAND_config
-	$ make u-boot.pbl
-   b. program u-boot.pbl to NAND flash
-	=> tftp 1000000 u-boot.pbl
+	$ make
+   b. program u-boot-with-spl-pbl.bin to NAND flash
+	=> tftp 1000000 u-boot-with-spl-pbl.bin
 	=> nand erase 0 d0000
 	=> nand write 1000000 0 $filesize
 	set SW1[1:8] = '10000010', SW2[1] = '1', SW3[4] = '1' for NAND boot
@@ -174,9 +175,9 @@ Software configurations and board settings
 3. SPI Boot:
    a. build PBL image for SPI boot
 	$ make T2080RDB_SPIFLASH_config
-	$ make u-boot.pbl
-   b. program u-boot.pbl to SPI flash
-	=> tftp 1000000 u-boot.pbl
+	$ make
+   b. program u-boot-with-spl-pbl.bin to SPI flash
+	=> tftp 1000000 u-boot-with-spl-pbl.bin
 	=> sf probe 0
 	=> sf erase 0 d0000
 	=> sf write 1000000 0 $filesize
@@ -185,13 +186,68 @@ Software configurations and board settings
 4. SD Boot:
    a. build PBL image for SD boot
 	$ make T2080RDB_SDCARD_config
-	$ make u-boot.pbl
-   b. program u-boot.pbl to TF card
-	=> tftp 1000000 u-boot.pbl
-	=> mmc write 1000000 8 1650
+	$ make
+   b. program u-boot-with-spl-pbl.bin to micro-SD/TF card
+	=> tftp 1000000 u-boot-with-spl-pbl.bin
+	=> mmc write 1000000 8 0x800
 	set SW1[1:8] = '00100000', SW2[1] = '0' for SD boot
 
 
+2-stage NAND/SPI/SD boot loader
+-------------------------------
+PBL initializes the internal CPC-SRAM and copy SPL(160K) to SRAM.
+SPL further initializes DDR using SPD and environment variables
+and copy u-boot(768 KB) from NAND/SPI/SD device to DDR.
+Finally SPL transers control to u-boot for futher booting.
+
+SPL has following features:
+ - Executes within 256K
+ - No relocation required
+
+Run time view of SPL framework
+-------------------------------------------------
+|Area		   | Address			|
+-------------------------------------------------
+|SecureBoot header | 0xFFFC0000 (32KB)		|
+-------------------------------------------------
+|GD, BD		   | 0xFFFC8000 (4KB)		|
+-------------------------------------------------
+|ENV		   | 0xFFFC9000 (8KB)		|
+-------------------------------------------------
+|HEAP		   | 0xFFFCB000 (50KB)		|
+-------------------------------------------------
+|STACK		   | 0xFFFD8000 (22KB)		|
+-------------------------------------------------
+|U-boot SPL	   | 0xFFFD8000 (160KB)		|
+-------------------------------------------------
+
+NAND Flash memory Map on T2080RDB
+--------------------------------------------------------------
+Start		End		Definition	Size
+0x000000	0x0FFFFF	u-boot img	1MB  (2 blocks)
+0x100000	0x17FFFF	u-boot env	512KB (1 block)
+0x180000	0x1FFFFF	FMAN ucode	512KB (1 block)
+0x200000	0x27FFFF	CS4315 ucode	512KB (1 block)
+
+
+Micro SD Card memory Map on T2080RDB
+----------------------------------------------------
+Block		#blocks		Definition	Size
+0x008		2048		u-boot img	1MB
+0x800		0016		u-boot env	8KB
+0x820		0128		FMAN ucode	64KB
+0x8a0		0512		CS4315 ucode	256KB
+
+
+SPI Flash memory Map on T2080RDB
+----------------------------------------------------
+Start		End		Definition	Size
+0x000000	0x0FFFFF	u-boot img	1MB
+0x100000	0x101FFF	u-boot env	8KB
+0x110000	0x11FFFF	FMAN ucode	64KB
+0x120000        0x15FFFF        CS4315 ucode	256KB
+
+
 How to update the ucode of Cortina CS4315/CS4340 10G PHY
 --------------------------------------------------------
 => tftp 1000000 CS4315-CS4340-PHY-ucode.txt
diff --git a/board/freescale/t208xrdb/ddr.c b/board/freescale/t208xrdb/ddr.c
index 01e917398f..8a26276273 100644
--- a/board/freescale/t208xrdb/ddr.c
+++ b/board/freescale/t208xrdb/ddr.c
@@ -100,13 +100,15 @@ phys_size_t initdram(int board_type)
 {
 	phys_size_t dram_size;
 
+#if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_RAMBOOT_PBL)
 	puts("Initializing....using SPD\n");
-
 	dram_size = fsl_ddr_sdram();
 
 	dram_size = setup_ddr_tlbs(dram_size / 0x100000);
 	dram_size *= 0x100000;
-
-	puts("    DDR: ");
+#else
+	/* DDR has been initialised by first stage boot loader */
+	dram_size = fsl_ddr_sdram_size();
+#endif
 	return dram_size;
 }
diff --git a/board/freescale/t208xrdb/spl.c b/board/freescale/t208xrdb/spl.c
new file mode 100644
index 0000000000..9ae2b1e863
--- /dev/null
+++ b/board/freescale/t208xrdb/spl.c
@@ -0,0 +1,107 @@
+/* Copyright 2013 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <ns16550.h>
+#include <nand.h>
+#include <i2c.h>
+#include <mmc.h>
+#include <fsl_esdhc.h>
+#include <spi_flash.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+phys_size_t get_effective_memsize(void)
+{
+	return CONFIG_SYS_L3_SIZE;
+}
+
+unsigned long get_board_sys_clk(void)
+{
+	return CONFIG_SYS_CLK_FREQ;
+}
+
+unsigned long get_board_ddr_clk(void)
+{
+	return CONFIG_DDR_CLK_FREQ;
+}
+
+void board_init_f(ulong bootflag)
+{
+	u32 plat_ratio, sys_clk, ccb_clk;
+	ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
+
+	/* Memcpy existing GD at CONFIG_SPL_GD_ADDR */
+	memcpy((void *)CONFIG_SPL_GD_ADDR, (void *)gd, sizeof(gd_t));
+
+	/* Update GD pointer */
+	gd = (gd_t *)(CONFIG_SPL_GD_ADDR);
+
+	console_init_f();
+
+	/* initialize selected port with appropriate baud rate */
+	sys_clk = get_board_sys_clk();
+	plat_ratio = (in_be32(&gur->rcwsr[0]) >> 25) & 0x1f;
+	ccb_clk = sys_clk * plat_ratio / 2;
+
+	NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1,
+		     ccb_clk / 16 / CONFIG_BAUDRATE);
+
+#if defined(CONFIG_SPL_MMC_BOOT)
+	puts("\nSD boot...\n");
+#elif defined(CONFIG_SPL_SPI_BOOT)
+	puts("\nSPI boot...\n");
+#elif defined(CONFIG_SPL_NAND_BOOT)
+	puts("\nNAND boot...\n");
+#endif
+
+	relocate_code(CONFIG_SPL_RELOC_STACK, (gd_t *)CONFIG_SPL_GD_ADDR, 0x0);
+}
+
+void board_init_r(gd_t *gd, ulong dest_addr)
+{
+	bd_t *bd;
+
+	bd = (bd_t *)(gd + sizeof(gd_t));
+	memset(bd, 0, sizeof(bd_t));
+	gd->bd = bd;
+	bd->bi_memstart = CONFIG_SYS_INIT_L3_ADDR;
+	bd->bi_memsize = CONFIG_SYS_L3_SIZE;
+
+	probecpu();
+	get_clocks();
+	mem_malloc_init(CONFIG_SPL_RELOC_MALLOC_ADDR,
+			CONFIG_SPL_RELOC_MALLOC_SIZE);
+
+#ifdef CONFIG_SPL_NAND_BOOT
+	nand_spl_load_image(CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE,
+			    (uchar *)CONFIG_ENV_ADDR);
+#endif
+#ifdef CONFIG_SPL_MMC_BOOT
+	mmc_initialize(bd);
+	mmc_spl_load_image(CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE,
+			   (uchar *)CONFIG_ENV_ADDR);
+#endif
+#ifdef CONFIG_SPL_SPI_BOOT
+	spi_spl_load_image(CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE,
+			   (uchar *)CONFIG_ENV_ADDR);
+#endif
+
+	gd->env_addr  = (ulong)(CONFIG_ENV_ADDR);
+	gd->env_valid = 1;
+
+	i2c_init_all();
+
+	gd->ram_size = initdram(0);
+
+#ifdef CONFIG_SPL_MMC_BOOT
+	mmc_boot();
+#elif defined(CONFIG_SPL_SPI_BOOT)
+	spi_boot();
+#elif defined(CONFIG_SPL_NAND_BOOT)
+	nand_boot();
+#endif
+}
diff --git a/board/freescale/t208xrdb/tlb.c b/board/freescale/t208xrdb/tlb.c
index 085d9f5c6a..2ebea36a5c 100644
--- a/board/freescale/t208xrdb/tlb.c
+++ b/board/freescale/t208xrdb/tlb.c
@@ -65,6 +65,7 @@ struct fsl_e_tlb_entry tlb_table[] = {
 		      MAS3_SX|MAS3_SR, MAS2_W|MAS2_G,
 		      0, 2, BOOKE_PAGESZ_256M, 1),
 
+#ifndef CONFIG_SPL_BUILD
 	/* *I*G* - PCIe 1, 0x80000000 */
 	SET_TLB_ENTRY(1, CONFIG_SYS_PCIE1_MEM_VIRT, CONFIG_SYS_PCIE1_MEM_PHYS,
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
@@ -110,6 +111,7 @@ struct fsl_e_tlb_entry tlb_table[] = {
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
 		      0, 12, BOOKE_PAGESZ_16M, 1),
 #endif
+#endif
 #ifdef CONFIG_SYS_DCSRBAR_PHYS
 	SET_TLB_ENTRY(1, CONFIG_SYS_DCSRBAR, CONFIG_SYS_DCSRBAR_PHYS,
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
@@ -140,7 +142,7 @@ struct fsl_e_tlb_entry tlb_table[] = {
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_G,
 		      0, 18, BOOKE_PAGESZ_1M, 1),
 #endif
-#if defined(CONFIG_SYS_RAMBOOT)
+#if defined(CONFIG_RAMBOOT_PBL) && !defined(CONFIG_SPL_BUILD)
 	SET_TLB_ENTRY(1, CONFIG_SYS_DDR_SDRAM_BASE, CONFIG_SYS_DDR_SDRAM_BASE,
 		      MAS3_SX|MAS3_SW|MAS3_SR, 0,
 		      0, 19, BOOKE_PAGESZ_2G, 1)