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/*
* Power setup code for EXYNOS5
*
* Copyright (C) 2012 Samsung Electronics
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 <arch/hlt.h>
#include <arch/io.h>
#include <console/console.h>
#include <cpu/samsung/exynos5250/cpu.h>
#include <cpu/samsung/exynos5250/power.h>
#include <cpu/samsung/exynos5250/sysreg.h>
#include <drivers/maxim/max77686/max77686.h>
#include "device/i2c.h"
#include "cpu/samsung/s5p-common/s3c24x0_i2c.h"
static void ps_hold_setup(void)
{
struct exynos5_power *power =
(struct exynos5_power *)samsung_get_base_power();
/* Set PS-Hold high */
setbits_le32(&power->ps_hold_ctrl, POWER_PS_HOLD_CONTROL_DATA_HIGH);
}
void power_reset(void)
{
struct exynos5_power *power =
(struct exynos5_power *)samsung_get_base_power();
/* Clear inform1 so there's no change we think we've got a wake reset */
power->inform1 = 0;
setbits_le32(&power->sw_reset, 1);
}
/* This function never returns */
void power_shutdown(void)
{
struct exynos5_power *power =
(struct exynos5_power *)samsung_get_base_power();
clrbits_le32(&power->ps_hold_ctrl, POWER_PS_HOLD_CONTROL_DATA_HIGH);
hlt();
}
void power_enable_dp_phy(void)
{
struct exynos5_power *power =
(struct exynos5_power *)samsung_get_base_power();
setbits_le32(&power->dptx_phy_control, DPTX_PHY_ENABLE);
}
void power_enable_usb_phy(void)
{
struct exynos5_sysreg *sysreg =
(struct exynos5_sysreg *)samsung_get_base_sysreg();
struct exynos5_power *power =
(struct exynos5_power *)samsung_get_base_power();
unsigned int phy_cfg;
/* Setting USB20PHY_CONFIG register to USB 2.0 HOST link */
phy_cfg = readl(&sysreg->usb20_phy_cfg);
if (phy_cfg & USB20_PHY_CFG_EN) {
debug("USB 2.0 HOST link already selected\n");
} else {
phy_cfg |= USB20_PHY_CFG_EN;
writel(phy_cfg, &sysreg->usb20_phy_cfg);
}
/* Enabling USBHOST_PHY */
setbits_le32(&power->usb_host_phy_ctrl, POWER_USB_HOST_PHY_CTRL_EN);
}
void power_disable_usb_phy(void)
{
struct exynos5_power *power =
(struct exynos5_power *)samsung_get_base_power();
/* Disabling USBHost_PHY */
clrbits_le32(&power->usb_host_phy_ctrl, POWER_USB_HOST_PHY_CTRL_EN);
}
void power_enable_hw_thermal_trip(void)
{
struct exynos5_power *power =
(struct exynos5_power *)samsung_get_base_power();
/* Enable HW thermal trip */
setbits_le32(&power->ps_hold_ctrl, POWER_ENABLE_HW_TRIP);
}
uint32_t power_read_reset_status(void)
{
struct exynos5_power *power =
(struct exynos5_power *)samsung_get_base_power();
return power->inform1;
}
void power_exit_wakeup(void)
{
struct exynos5_power *power =
(struct exynos5_power *)samsung_get_base_power();
typedef void (*resume_func)(void);
((resume_func)power->inform0)();
}
/**
* Initialize the pmic voltages to power up the system
* This also calls i2c_init so that we can program the pmic
*
* REG_ENABLE = 0, needed to set the buck/ldo enable bit ON
*
* @return Return 0 if ok, else -1
*/
int power_init(void)
{
int error = 0;
/*
* FIXME(dhendrix): We will re-factor the caller of power_init()
* to start from a board-specific romstage file and do the i2c
* early setup. There is no reason CPU power init code should
* mess with board-specific i2c parameters.
*/
/* Set the i2c register address base so i2c works before FDT */
i2c_set_early_reg(0x12c60000);
ps_hold_setup();
i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
/*
* 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();
error |= max77686_volsetting(PMIC_BUCK2, CONFIG_VDD_ARM_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUCK3, CONFIG_VDD_INT_UV,
REG_ENABLE, MAX77686_UV);
error |= max77686_volsetting(PMIC_BUCK1, CONFIG_VDD_MIF_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUCK4, CONFIG_VDD_G3D_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_LDO2, CONFIG_VDD_LDO2_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_LDO3, CONFIG_VDD_LDO3_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_LDO5, CONFIG_VDD_LDO5_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_LDO10, CONFIG_VDD_LDO10_MV,
REG_ENABLE, MAX77686_MV);
if (error != 0) {
power_shutdown();
printk(BIOS_ERR, "power init failed\n");
}
return error;
}
void power_enable_xclkout(void)
{
struct exynos5_power *power =
(struct exynos5_power *)samsung_get_base_power();
/* use xxti for xclk out */
clrsetbits_le32(&power->pmu_debug, PMU_DEBUG_CLKOUT_SEL_MASK,
PMU_DEBUG_XXTI);
}
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