board/freescale/p1022ds/spl.c

/*
 * Copyright 2013 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 */

#include <common.h>
#include <ns16550.h>
#include <malloc.h>
#include <mmc.h>
#include <nand.h>
#include <i2c.h>
#include "../common/ngpixis.h"
#include <fsl_esdhc.h>

DECLARE_GLOBAL_DATA_PTR;

static const u32 sysclk_tbl[] = {
	66666000, 7499900, 83332500, 8999900,
	99999000, 11111000, 12499800, 13333200
};

ulong get_effective_memsize(void)
{
	return CONFIG_SYS_L2_SIZE;
}

void board_init_f(ulong bootflag)
{
	int px_spd;
	u32 plat_ratio, sys_clk, 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);

	/* 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_MASK];
	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);
#ifdef CONFIG_SPL_MMC_BOOT
	puts("\nSD 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);
	env_init();
#ifdef CONFIG_SPL_MMC_BOOT
	mmc_initialize(bd);
#endif
	/* relocate environment function pointers etc. */
	env_relocate();

	i2c_init(CONFIG_SYS_FSL_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);

	gd->ram_size = initdram(0);
	puts("Second program loader running in sram...\n");

#ifdef CONFIG_SPL_MMC_BOOT
	mmc_boot();
#endif
}