| /* |
| * 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.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); |
| } |