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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 <armv7.h>
#include <cbfs.h>
#include <common.h>
#include <arch/cache.h>
#include <arch/gpio.h>
#include <cpu/samsung/exynos5-common/i2c.h>
#include <cpu/samsung/exynos5250/clk.h>
#include <cpu/samsung/exynos5250/cpu.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 <time.h>
#include <drivers/maxim/max77686/max77686.h>
#include <device/i2c.h>
#include "mainboard.h"
#define PMIC_BUS 0
#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
static int setup_pmic(void)
{
int error = 0;
/*
* We're using CR1616 coin cell battery that is non-rechargeable
* battery. But, BBCHOSTEN bit of the BBAT Charger Register in
* MAX77686 is enabled by default for charging coin cell.
*
* Also, we cannot meet the coin cell reverse current spec. in UL
* standard if BBCHOSTEN bit is enabled.
*
* Disable Coin BATT Charging
*/
error = max77686_disable_backup_batt(PMIC_BUS);
error |= max77686_volsetting(PMIC_BUS, PMIC_BUCK2, CONFIG_VDD_ARM_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_BUCK3, CONFIG_VDD_INT_UV,
REG_ENABLE, MAX77686_UV);
error |= max77686_volsetting(PMIC_BUS, PMIC_BUCK1, CONFIG_VDD_MIF_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_BUCK4, CONFIG_VDD_G3D_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_LDO2, CONFIG_VDD_LDO2_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_LDO3, CONFIG_VDD_LDO3_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_LDO5, CONFIG_VDD_LDO5_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_LDO10, CONFIG_VDD_LDO10_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_enable_32khz_cp(PMIC_BUS);
if (error)
printk(BIOS_CRIT, "%s: Error during PMIC setup\n", __func__);
return error;
}
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);
}
static void chromeos_gpios(void)
{
struct exynos5_gpio_part1 *gpio_pt1;
struct exynos5_gpio_part2 *gpio_pt2;
enum {
WP_GPIO = 6,
RECMODE_GPIO = 0,
LID_GPIO = 5,
POWER_GPIO = 3
};
gpio_pt1 = (struct exynos5_gpio_part1 *)EXYNOS5_GPIO_PART1_BASE;
gpio_pt2 = (struct exynos5_gpio_part2 *)EXYNOS5_GPIO_PART2_BASE;
s5p_gpio_direction_input(&gpio_pt1->d1, WP_GPIO);
s5p_gpio_set_pull(&gpio_pt1->d1, WP_GPIO, EXYNOS_GPIO_PULL_NONE);
s5p_gpio_direction_input(&gpio_pt1->y1, RECMODE_GPIO);
s5p_gpio_set_pull(&gpio_pt1->y1, RECMODE_GPIO, EXYNOS_GPIO_PULL_NONE);
s5p_gpio_direction_input(&gpio_pt2->x3, LID_GPIO);
s5p_gpio_set_pull(&gpio_pt2->x3, LID_GPIO, EXYNOS_GPIO_PULL_NONE);
s5p_gpio_direction_input(&gpio_pt2->x1, POWER_GPIO);
s5p_gpio_set_pull(&gpio_pt2->x1, POWER_GPIO, EXYNOS_GPIO_PULL_NONE);
}
void main(void)
{
struct mem_timings *mem;
struct arm_clk_ratios *arm_ratios;
int ret;
void *entry;
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();
i2c_init(0, CONFIG_SYS_I2C_SPEED, 0x00);
if (power_init())
power_shutdown();
printk(BIOS_DEBUG, "%s: setting up pmic...\n", __func__);
if (setup_pmic())
power_shutdown();
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);
}
initialize_s5p_mshc();
chromeos_gpios();
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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