board/p1_p2_rdb:Enable p1_p2_rdb boot from NAND/SD/SPI in SPL

In the earlier patches, the SPL/TPL fraamework was introduced.
For SD/SPI flash booting way, we introduce the SPL to enable a loader stub. The
SPL was loaded by the code from the internal on-chip ROM. The SPL initializes
the DDR according to the SPD and loads the final uboot image into DDR, then
jump to the DDR to begin execution.

For NAND booting way, the nand SPL has size limitation on some board(e.g.
P1010RDB), it can not be more than 4KB, we can call it "minimal SPL", So the
dynamic DDR driver doesn't fit into this minimum SPL. We added the TPL that is
loaded by the the minimal SPL. The TPL initializes the DDR according to the SPD
and loads the final uboot image into DDR,then jump to the DDR to begin execution.

This patch enabled SPL/TPL for P1_P2_RDB to support starting from NAND/SD/SPI
flash with SPL framework and initializing the DDR according to SPD in the SPL/TPL.
Because the minimal SPL load the TPL to L2 SRAM and the jump to the L2 SRAM to
execute, so the section .resetvec is no longer needed.

Signed-off-by: Prabhakar Kushwaha <[email protected]>
Reviewed-by: York Sun <[email protected]>

Author: Prabhakar Kushwaha

board/freescale/p1_p2_rdb/Makefile

@@ -4,8 +4,27 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
+MINIMAL=
+
+ifdef CONFIG_SPL_BUILD
+ifdef CONFIG_SPL_INIT_MINIMAL
+MINIMAL=y
+endif
+endif
+
+ifdef MINIMAL
+
+obj-y	+= spl_minimal.o tlb.o law.o
+
+else
+ifdef CONFIG_SPL_BUILD
+obj-y += spl.o
+else
 obj-y	+= p1_p2_rdb.o
+obj-$(CONFIG_PCI)  += pci.o
+endif
 obj-y	+= ddr.o
 obj-y	+= law.o
-obj-$(CONFIG_PCI)  += pci.o
 obj-y	+= tlb.o
+
+endif

board/freescale/p1_p2_rdb/ddr.c

@@ -180,27 +180,22 @@ fsl_ddr_cfg_regs_t ddr_cfg_regs_800 = {
 
 phys_size_t fixed_sdram (void)
 {
-	char buf[32];
 	fsl_ddr_cfg_regs_t ddr_cfg_regs;
 	size_t ddr_size;
 	struct cpu_type *cpu;
 	ulong ddr_freq, ddr_freq_mhz;
 
 	cpu = gd->arch.cpu;
-	/* P1020 and it's derivatives support max 32bit DDR width */
-	if (cpu->soc_ver == SVR_P1020 || cpu->soc_ver == SVR_P1011) {
-		ddr_size = (CONFIG_SYS_SDRAM_SIZE * 1024 * 1024 / 2);
-	} else {
-		ddr_size = CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
-	}
+
+	ddr_size = CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
+
 #if defined(CONFIG_SYS_RAMBOOT)
 	return ddr_size;
 #endif
 	ddr_freq = get_ddr_freq(0);
 	ddr_freq_mhz = ddr_freq / 1000000;
 
-	printf("Configuring DDR for %s MT/s data rate\n",
-				strmhz(buf, ddr_freq));
+	printf("Configuring DDR for %ld T/s data rate\n", ddr_freq);
 
 	if(ddr_freq_mhz <= 400)
 		memcpy(&ddr_cfg_regs, &ddr_cfg_regs_400, sizeof(ddr_cfg_regs));
@@ -211,8 +206,7 @@ phys_size_t fixed_sdram (void)
 	else if(ddr_freq_mhz <= 800)
 		memcpy(&ddr_cfg_regs, &ddr_cfg_regs_800, sizeof(ddr_cfg_regs));
 	else
-		panic("Unsupported DDR data rate %s MT/s data rate\n",
-					strmhz(buf, ddr_freq));
+		panic("Unsupported DDR data rate %ld T/s\n", ddr_freq);
 
 	/* P1020 and it's derivatives support max 32bit DDR width */
 	if (cpu->soc_ver == SVR_P1020 || cpu->soc_ver == SVR_P1011) {

board/freescale/p1_p2_rdb/spl.c

@@ -0,0 +1,141 @@
+/*
+ * Copyright 2013 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <ns16550.h>
+#include <malloc.h>
+#include <mmc.h>
+#include <nand.h>
+#include <i2c.h>
+#include <fsl_esdhc.h>
+#include <spi_flash.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define SYSCLK_MASK	0x00200000
+#define BOARDREV_MASK	0x10100000
+
+#define SYSCLK_66	66666666
+#define SYSCLK_100	100000000
+
+unsigned long get_board_sys_clk(ulong dummy)
+{
+	ccsr_gpio_t *pgpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR);
+	u32 val_gpdat, sysclk_gpio;
+
+	val_gpdat = in_be32(&pgpio->gpdat);
+	sysclk_gpio = val_gpdat & SYSCLK_MASK;
+
+	if (sysclk_gpio == 0)
+		return SYSCLK_66;
+	else
+		return SYSCLK_100;
+
+	return 0;
+}
+
+phys_size_t get_effective_memsize(void)
+{
+	return CONFIG_SYS_L2_SIZE;
+}
+
+void board_init_f(ulong bootflag)
+{
+	u32 plat_ratio, bus_clk;
+	ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
+
+	console_init_f();
+
+	/* Set pmuxcr to allow both i2c1 and i2c2 */
+	setbits_be32(&gur->pmuxcr, in_be32(&gur->pmuxcr) | 0x1000);
+	setbits_be32(&gur->pmuxcr,
+		     in_be32(&gur->pmuxcr) | MPC85xx_PMUXCR_SD_DATA);
+
+	/* Read back the register to synchronize the write. */
+	in_be32(&gur->pmuxcr);
+
+#ifdef CONFIG_SPL_SPI_BOOT
+	clrbits_be32(&gur->pmuxcr, MPC85xx_PMUXCR_SD_DATA);
+#endif
+
+	/* initialize selected port with appropriate baud rate */
+	plat_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_PLAT_RATIO;
+	plat_ratio >>= 1;
+	bus_clk = CONFIG_SYS_CLK_FREQ * plat_ratio;
+	gd->bus_clk = bus_clk;
+
+	NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1,
+		     bus_clk / 16 / CONFIG_BAUDRATE);
+#ifdef CONFIG_SPL_MMC_BOOT
+	puts("\nSD boot...\n");
+#elif defined(CONFIG_SPL_SPI_BOOT)
+	puts("\nSPI Flash boot...\n");
+#endif
+
+	/* copy code to RAM and jump to it - this should not return */
+	/* NOTE - code has to be copied out of NAND buffer before
+	 * other blocks can be read.
+	 */
+	relocate_code(CONFIG_SPL_RELOC_STACK, 0, CONFIG_SPL_RELOC_TEXT_BASE);
+}
+
+void board_init_r(gd_t *gd, ulong dest_addr)
+{
+	/* Pointer is writable since we allocated a register for it */
+	gd = (gd_t *)CONFIG_SPL_GD_ADDR;
+	bd_t *bd;
+
+	memset(gd, 0, sizeof(gd_t));
+	bd = (bd_t *)(CONFIG_SPL_GD_ADDR + sizeof(gd_t));
+	memset(bd, 0, sizeof(bd_t));
+	gd->bd = bd;
+	bd->bi_memstart = CONFIG_SYS_INIT_L2_ADDR;
+	bd->bi_memsize = CONFIG_SYS_L2_SIZE;
+
+	probecpu();
+	get_clocks();
+	mem_malloc_init(CONFIG_SPL_RELOC_MALLOC_ADDR,
+			CONFIG_SPL_RELOC_MALLOC_SIZE);
+
+#ifdef CONFIG_SPL_MMC_BOOT
+	mmc_initialize(bd);
+#endif
+	/* relocate environment function pointers etc. */
+#ifdef CONFIG_SPL_NAND_BOOT
+	nand_spl_load_image(CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE,
+			    (uchar *)CONFIG_ENV_ADDR);
+#endif
+#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_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;
+
+	gd->ram_size = initdram(0);
+#ifdef CONFIG_SPL_NAND_BOOT
+	puts("Tertiary program loader running in sram...");
+#else
+	puts("Second program loader running in sram...\n");
+#endif
+
+#ifdef CONFIG_SPL_MMC_BOOT
+	mmc_boot();
+#elif defined(CONFIG_SPL_SPI_BOOT)
+	spi_boot();
+#elif defined(CONFIG_SPL_NAND_BOOT)
+	nand_boot();
+#endif
+}

board/freescale/p1_p2_rdb/spl_minimal.c

@@ -0,0 +1,84 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <ns16550.h>
+#include <asm/io.h>
+#include <nand.h>
+#include <linux/compiler.h>
+#include <asm/fsl_law.h>
+#include <fsl_ddr_sdram.h>
+#include <asm/global_data.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+#define SYSCLK_MASK	0x00200000
+#define BOARDREV_MASK	0x10100000
+
+#define SYSCLK_66	66666666
+#define SYSCLK_100	100000000
+
+unsigned long get_board_sys_clk(ulong dummy)
+{
+	ccsr_gpio_t *pgpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR);
+	u32 val_gpdat, sysclk_gpio;
+
+	val_gpdat = in_be32(&pgpio->gpdat);
+	sysclk_gpio = val_gpdat & SYSCLK_MASK;
+
+	if (sysclk_gpio == 0)
+		return SYSCLK_66;
+	else
+		return SYSCLK_100;
+
+	return 0;
+}
+
+void board_init_f(ulong bootflag)
+{
+	u32 plat_ratio;
+	ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
+
+#if defined(CONFIG_SYS_NAND_BR_PRELIM) && defined(CONFIG_SYS_NAND_OR_PRELIM)
+	set_lbc_br(0, CONFIG_SYS_NAND_BR_PRELIM);
+	set_lbc_or(0, CONFIG_SYS_NAND_OR_PRELIM);
+#endif
+
+	/* initialize selected port with appropriate baud rate */
+	plat_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_PLAT_RATIO;
+	plat_ratio >>= 1;
+	gd->bus_clk = CONFIG_SYS_CLK_FREQ * plat_ratio;
+
+	NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1,
+		     gd->bus_clk / 16 / CONFIG_BAUDRATE);
+
+	puts("\nNAND boot... ");
+
+	/* copy code to RAM and jump to it - this should not return */
+	/* NOTE - code has to be copied out of NAND buffer before
+	 * other blocks can be read.
+	 */
+	relocate_code(CONFIG_SPL_RELOC_STACK, 0, CONFIG_SPL_RELOC_TEXT_BASE);
+}
+
+void board_init_r(gd_t *gd, ulong dest_addr)
+{
+	puts("\nSecond program loader running in sram...");
+	nand_boot();
+}
+
+void putc(char c)
+{
+	if (c == '\n')
+		NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, '\r');
+
+	NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, c);
+}
+
+void puts(const char *str)
+{
+	while (*str)
+		putc(*str++);
+}

board/freescale/p1_p2_rdb/tlb.c

@@ -37,6 +37,7 @@ struct fsl_e_tlb_entry tlb_table[] = {
 			MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
 			0, 1, BOOKE_PAGESZ_1M, 1),
 
+#ifndef CONFIG_SPL_BUILD
 	/* W**G* - Flash/promjet, localbus */
 	/* This will be changed to *I*G* after relocation to RAM. */
 	SET_TLB_ENTRY(1, CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE_PHYS,
@@ -55,6 +56,7 @@ struct fsl_e_tlb_entry tlb_table[] = {
 			0, 4, BOOKE_PAGESZ_256K, 1),
 
 #endif /* #if defined(CONFIG_PCI) */
+#endif
 	/* *I*G - NAND */
 	SET_TLB_ENTRY(1, CONFIG_SYS_NAND_BASE, CONFIG_SYS_NAND_BASE_PHYS,
 			MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
@@ -65,7 +67,21 @@ struct fsl_e_tlb_entry tlb_table[] = {
 			MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
 			0, 6, BOOKE_PAGESZ_1M, 1),
 
-#if defined(CONFIG_SYS_RAMBOOT)
+#ifdef CONFIG_SYS_INIT_L2_ADDR
+	/* *I*G - L2SRAM */
+	SET_TLB_ENTRY(1, CONFIG_SYS_INIT_L2_ADDR, CONFIG_SYS_INIT_L2_ADDR_PHYS,
+		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_G,
+		      0, 11, BOOKE_PAGESZ_256K, 1),
+#if CONFIG_SYS_L2_SIZE >= (256 << 10)
+	SET_TLB_ENTRY(1, CONFIG_SYS_INIT_L2_ADDR + 0x40000,
+		      CONFIG_SYS_INIT_L2_ADDR_PHYS + 0x40000,
+		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+		      0, 12, BOOKE_PAGESZ_256K, 1),
+#endif
+#endif
+
+#if defined(CONFIG_SYS_RAMBOOT) || \
+	(defined(CONFIG_SPL) && !defined(CONFIG_SPL_COMMON_INIT_DDR))
 	SET_TLB_ENTRY(1, CONFIG_SYS_DDR_SDRAM_BASE, CONFIG_SYS_DDR_SDRAM_BASE,
 			MAS3_SX|MAS3_SW|MAS3_SR, 0,
 			0, 7, BOOKE_PAGESZ_1G, 1)