nand_spl/board/freescale/mpc8536ds/nand_boot.c

/*
 * Copyright 2009 Freescale Semiconductor, Inc.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <ns16550.h>
#include <asm/io.h>
#include <nand.h>

u32 sysclk_tbl[] = {
	33333000, 39999600, 49999500, 66666000,
	83332500, 99999000, 133332000, 166665000
};

void board_init_f(ulong bootflag)
{
	int px_spd;
	u32 plat_ratio, bus_clk, sys_clk;
	ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;

#if defined(CONFIG_SYS_BR3_PRELIM) && defined(CONFIG_SYS_OR3_PRELIM)
	/* for FPGA */
	set_lbc_br(3, CONFIG_SYS_BR3_PRELIM);
	set_lbc_or(3, CONFIG_SYS_OR3_PRELIM);
#else
#error CONFIG_SYS_BR3_PRELIM, CONFIG_SYS_OR3_PRELIM must be defined
#endif

	/* initialize selected port with appropriate baud rate */
	px_spd = in_8((unsigned char *)(PIXIS_BASE + PIXIS_SPD));
	sys_clk = sysclk_tbl[px_spd & PIXIS_SPD_SYSCLK];
	plat_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_PLAT_RATIO;
	bus_clk = sys_clk * plat_ratio / 2;

	NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1,
			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_SYS_NAND_U_BOOT_RELOC_SP, 0,
			CONFIG_SYS_NAND_U_BOOT_RELOC);
}

void board_init_r(gd_t *gd, ulong dest_addr)
{
	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++);
}