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/*
* This file is part of the coreboot project.
*
* Copyright 2014 Google Inc.
* Copyright (c) 2013-2015, NVIDIA CORPORATION. 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.
*/
#include <boardid.h>
#include <console/console.h>
#include <delay.h>
#include <device/i2c_simple.h>
#include <reset.h>
#include <stdint.h>
#include <stdlib.h>
#include "pmic.h"
enum {
MAX77620_I2C_ADDR = 0x3c
};
struct max77620_init_reg {
u8 reg;
u8 val;
u8 delay;
};
static struct max77620_init_reg init_list[] = {
/* TODO */
};
static void pmic_write_reg(unsigned bus, uint8_t reg, uint8_t val, int delay)
{
if (i2c_writeb(bus, MAX77620_I2C_ADDR, reg, val)) {
printk(BIOS_ERR, "%s: reg = 0x%02X, value = 0x%02X failed!\n",
__func__, reg, val);
/* Reset the board on any PMIC write error */
board_reset();
} else {
if (delay)
udelay(500);
}
}
static void pmic_slam_defaults(unsigned bus)
{
int i;
for (i = 0; i < ARRAY_SIZE(init_list); i++) {
struct max77620_init_reg *reg = &init_list[i];
pmic_write_reg(bus, reg->reg, reg->val, reg->delay);
}
}
void pmic_init(unsigned bus)
{
/* Restore PMIC POR defaults, in case kernel changed 'em */
pmic_slam_defaults(bus);
/* Setup/Enable GPIO5 - VDD_CPU_REG_EN */
pmic_write_reg(bus, MAX77620_GPIO5_REG, 0x09, 1);
/* Setup/Enable GPIO1 - VDD_HDMI_5V0_BST_EN -- ??? */
pmic_write_reg(bus, MAX77620_GPIO1_REG, 0x09, 1);
/* GPIO 0,1,5,6,7 = GPIO, 2,3,4 = alt mode */
pmic_write_reg(bus, MAX77620_AME_GPIO, 0x1c, 1);
/* Disable SD1 Remote Sense, Set SD1 for LPDDR4 to 1.125v? */
pmic_write_reg(bus, MAX77620_CNFG2SD_REG, 0x04, 1);
pmic_write_reg(bus, MAX77620_SD1_REG, 0x2a, 1);
/* CNFG1_L2 = 0xF2 for 3.3v, enabled */
pmic_write_reg(bus, MAX77620_CNFG1_L2_REG, 0xf2, 1);
/* CNFG1_L1 = 0xCA for 1.05v, enabled */
pmic_write_reg(bus, MAX77620_CNFG1_L1_REG, 0xca, 1);
printk(BIOS_DEBUG, "PMIC init done\n");
}
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