board/Marvell/orchid/pm800.c

/*
 * (C) Copyright 2011
 * Marvell Semiconductors Ltd. <www.marvell.com>
 *
 * 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 <i2c.h>

/* Base Page */
#define PM800_BASE_PAGE	0x30

#define PM800_CHIP_ID	0x00

#define PM800_WAKEUP1	0x0D
#define PM800_WAKEUP2	0x0E

/* Power Page */
#define PM800_POWER_PAGE	0x31

#define VBUCK_EN_REG	0x50
#define LDO_EN_REG1	0x51
#define LDO_EN_REG2	0x52
#define LDO_EN_REG3	0x53

#define LDO13_EN (1<<4)
#define LDO15_EN (1<<6)
#define LDO16_EN (1<<7)
#define LDO17_EN (1<<0)

#define VBUCK1_SET_REG	0x3C
#define VBUCK2_SET_REG	0x40
#define VBUCK3_SET_REG	0x41
#define VBUCK4_SET_REG	0x42
#define VBUCK5_SET_REG	0x43

#define LDO1_SET_REG	0x08
#define LDO2_SET_REG	0x0B
#define LDO3_SET_REG	0x0C
#define LDO4_SET_REG	0x0D
#define LDO5_SET_REG	0x0E
#define LDO6_SET_REG	0x0F
#define LDO7_SET_REG	0x10
#define LDO8_SET_REG	0x11
#define LDO9_SET_REG	0x12
#define LDO10_SET_REG	0x13
#define LDO11_SET_REG	0x14
#define LDO12_SET_REG	0x15
#define LDO13_SET_REG	0x16
#define LDO14_SET_REG	0x17
#define LDO15_SET_REG	0x18
#define LDO16_SET_REG	0x19
#define LDO17_SET_REG	0x1A
#define LDO18_SET_REG	0x1B
#define LDO19_SET_REG	0x1C

/* Procida Chip ID */
enum {
	PM800_CHIP_A0  = 0x60,
	PM800_CHIP_A1  = 0x61,
	PM800_CHIP_B0  = 0x62,
	PM800_CHIP_C0  = 0x63,
};

static inline int pm800_read_reg_power(u8 reg, u8 *val)
{
	return i2c_read(PM800_POWER_PAGE, reg, 1, val, 1);
}

static inline int pm800_write_reg_power(u8 reg, u8 val)
{
	return i2c_write(PM800_POWER_PAGE, reg, 1, &val, 1);
}

static inline int pm800_read_reg_base(u8 reg, u8 *val)
{
	return i2c_read(PM800_BASE_PAGE, reg, 1, val, 1);
}

static inline int pm800_write_reg_base(u8 reg, u8 val)
{
	return i2c_write(PM800_BASE_PAGE, reg, 1, &val, 1);
}

static int pm800_voltage_init(void)
{
	int ret = 0;
	u8 val;

	/* enable buck2 (1.25v) for lpddr2 */
	val = 0x34;
	ret |= pm800_write_reg_power(VBUCK2_SET_REG, val);

	/* enable buck5 (1.25v) for wukong */
	val = 0x34;
	ret |= pm800_write_reg_power(VBUCK5_SET_REG, val);

	/* enable ldo17 */
	ret |= pm800_read_reg_power(LDO_EN_REG3, &val);
	val |= LDO17_EN;
	ret |= pm800_write_reg_power(LDO_EN_REG3, val);

	/* enable ldo16 (3.3v) for wifi */
	val = 0xff;
	ret |= pm800_write_reg_power(LDO16_SET_REG, val);

	/* enable ldo13, ldo15, ldo16 */
	ret |= pm800_read_reg_power(LDO_EN_REG2, &val);
	val |= LDO13_EN | LDO15_EN | LDO16_EN;
	ret |= pm800_write_reg_power(LDO_EN_REG2, val);

	return ret;
}

static int pm800_disable_watch_dog(void)
{
	int ret = 0;

	/* Set WD_TIMER_COUNT to 0 */
	ret |= pm800_write_reg_base(PM800_WAKEUP2, 0x0);
	/* Reset watch dog timer */
	ret |= pm800_write_reg_base(PM800_WAKEUP1, 0x10);
	return ret;
}

int pmic_init(void)
{
	int ret = 0;
	unsigned int cur_bus = i2c_get_bus_num();
	u8 val;
	/* Set i2c bus */
	i2c_set_bus_num(0);
	ret |= pm800_read_reg_base(PM800_CHIP_ID, &val);
	printf("Procida Chip ID: 0x%x\n", val);
	/* Disable Watch Dog */
	if (val < PM800_CHIP_C0)
		ret |= pm800_disable_watch_dog();
	/* Voltage init */
	ret |= pm800_voltage_init();
	/* Restore i2c bus num */
	i2c_set_bus_num(cur_bus);
	return ret;
}