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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2012 The ChromiumOS Authors. All rights reserved.
*
* 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; version 2 of the License.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <types.h>
#include <system.h>
#include <cache.h>
#include <cbfs.h>
#include <common.h>
#include <arch/gpio.h>
#include <cpu/samsung/exynos5250/clk.h>
#include <cpu/samsung/exynos5250/dmc.h>
#include <cpu/samsung/exynos5250/gpio.h>
#include <cpu/samsung/exynos5250/setup.h>
#include <cpu/samsung/exynos5250/periph.h>
#include <cpu/samsung/exynos5250/power.h>
#include <cpu/samsung/exynos5250/clock_init.h>
#include <console/console.h>
#include <arch/stages.h>
#include "mainboard.h"
#define MMC0_GPIO_PIN (58)
#if 0
static int board_wakeup_permitted(void)
{
const int gpio = GPIO_Y10;
int is_bad_wake;
/* We're a bad wakeup if the gpio was defined and was high */
is_bad_wake = ((gpio != -1) && gpio_get_value(gpio));
return !is_bad_wake;
}
#endif
/*
* Set/clear program flow prediction and return the previous state.
*/
static int config_branch_prediction(int set_cr_z)
{
unsigned int cr;
/* System Control Register: 11th bit Z Branch prediction enable */
cr = get_cr();
set_cr(set_cr_z ? cr | CR_Z : cr & ~CR_Z);
return cr & CR_Z;
}
static void initialize_s5p_mshc(void)
{
/* MMC0: Fixed, 8 bit mode, connected with GPIO. */
if (clock_set_mshci(PERIPH_ID_SDMMC0))
printk(BIOS_CRIT, "Failed to set clock for SDMMC0.\n");
if (gpio_direction_output(MMC0_GPIO_PIN, 1)) {
printk(BIOS_CRIT, "Unable to power on SDMMC0.\n");
}
gpio_set_pull(MMC0_GPIO_PIN, EXYNOS_GPIO_PULL_NONE);
gpio_set_drv(MMC0_GPIO_PIN, EXYNOS_GPIO_DRV_4X);
exynos_pinmux_config(PERIPH_ID_SDMMC0, PINMUX_FLAG_8BIT_MODE);
/* MMC2: Removable, 4 bit mode, no GPIO. */
clock_set_mshci(PERIPH_ID_SDMMC2);
exynos_pinmux_config(PERIPH_ID_SDMMC2, 0);
}
static void graphics(void)
{
exynos_pinmux_config(PERIPH_ID_DPHPD, 0);
}
void main(void)
{
struct mem_timings *mem;
struct arm_clk_ratios *arm_ratios;
int ret;
void *entry;
/* FIXME: if we boot from USB, we need to disable branch prediction
* before copying from USB into RAM */
config_branch_prediction(1);
clock_set_rate(PERIPH_ID_SPI1, 50000000); /* set spi clock to 50Mhz */
/* Clock must be initialized before console_init, otherwise you may need
* to re-initialize serial console drivers again. */
mem = get_mem_timings();
arm_ratios = get_arm_clk_ratios();
system_clock_init(mem, arm_ratios);
console_init();
/*
* FIXME: Do necessary I2C init so low-level PMIC code doesn't need to.
* Also, we should only call power_init() on cold boot.
*/
power_init();
if (!mem) {
printk(BIOS_CRIT, "Unable to auto-detect memory timings\n");
while(1);
}
printk(BIOS_SPEW, "man: 0x%x type: 0x%x, div: 0x%x, mhz: 0x%x\n",
mem->mem_manuf,
mem->mem_type,
mem->mpll_mdiv,
mem->frequency_mhz);
ret = ddr3_mem_ctrl_init(mem, DMC_INTERLEAVE_SIZE);
if (ret) {
printk(BIOS_ERR, "Memory controller init failed, err: %x\n",
ret);
while(1);
}
mmu_setup(CONFIG_SYS_SDRAM_BASE, CONFIG_DRAM_SIZE_MB);
initialize_s5p_mshc();
graphics();
entry = cbfs_load_stage(CBFS_DEFAULT_MEDIA, "fallback/coreboot_ram");
printk(BIOS_INFO, "entry is 0x%p, leaving romstage.\n", entry);
stage_exit(entry);
}
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