blob: cc20979f50fdcc0566de055d13a9ee8834902f59 [file] [log] [blame]
/*
* This file is part of the coreboot project.
*
* Copyright 2015 MediaTek Inc.
*
* 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 <console/console.h>
#include <device/i2c_simple.h>
#include <soc/da9212.h>
enum {
DA9212_SLAVE_ADDR = 0x68,
};
static void da9212_hw_init(uint8_t i2c_num, unsigned char variant_id)
{
int ret = 0;
int buck_mode = DA9212_BUCK_MODE_AUTO;
if (variant_id == DA9212_VARIANT_ID_AB)
buck_mode = DA9212_BUCK_MODE_PWM;
/* page select to 0 */
ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
DA9212_REG_PAGE_CON, DA9212_REG_PAGE0,
DA9212_REG_PAGE_MASK, DA9212_REG_PAGE_SHIFT);
ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
DA9212_REG_BUCKA_CONT, DA9212_BUCK_GPI_GPIO1,
DA9212_BUCK_GPI_MASK, DA9212_BUCK_GPI_SHIFT);
ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
DA9212_REG_BUCKB_CONT, DA9212_BUCK_GPI_OFF,
DA9212_BUCK_GPI_OFF, DA9212_BUCK_GPI_SHIFT);
ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
DA9212_REG_BUCKA_CONT, DA9212_VBUCK_SEL_A,
DA9212_VBUCK_SEL_MASK, DA9212_VBUCK_SEL_SHIFT);
ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
DA9212_REG_BUCKB_CONT, DA9212_VBUCK_SEL_A,
DA9212_VBUCK_SEL_MASK, DA9212_VBUCK_SEL_SHIFT);
ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
DA9212_REG_BUCKA_CONF, buck_mode,
DA9212_BUCK_MODE_MASK, DA9212_BUCK_MODE_SHIFT);
ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
DA9212_REG_BUCKB_CONF, buck_mode,
DA9212_BUCK_MODE_MASK, DA9212_BUCK_MODE_SHIFT);
if (ret)
printk(BIOS_ERR, "ERROR: %s failed\n", __func__);
}
void da9212_probe(uint8_t i2c_num)
{
int ret = 0;
unsigned char device_id = 0;
unsigned char variant_id = 0;
/* select to page 4, clear REVERT at first time */
ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
DA9212_REG_PAGE_CON, DA9212_REG_PAGE4,
0xF, DA9212_REG_PAGE_SHIFT);
ret |= i2c_read_field(i2c_num, DA9212_SLAVE_ADDR,
DA9212_REG_DEVICE_ID, &device_id,
0xFF, 0);
ret |= i2c_read_field(i2c_num, DA9212_SLAVE_ADDR,
DA9212_REG_VARIANT_ID, &variant_id,
0xFF, 0);
printk(BIOS_INFO, "%s: device ID = %#x, variant ID = %#x\n", __func__,
device_id, variant_id);
/* Check device ID is DA9212 */
if (device_id != DA9212_ID || ret) {
printk(BIOS_ERR, "ERROR: unknown DA9212 device_id\n");
return;
}
da9212_hw_init(i2c_num, variant_id);
}