u-boot/board/freescale/p1_p2_rdb/spl.c
Prabhakar Kushwaha bc2d40ca10 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 <prabhakar@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
2014-05-16 16:24:27 -05:00

141 lines
3.3 KiB
C

/*
* 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
}