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/*
* This file is part of the coreboot project.
*
* Copyright 2018 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 <arch/io.h>
#include <gpio.h>
enum {
EN_OFFSET = 0x60,
SEL_OFFSET = 0x80,
};
static void gpio_set_pull_pupd(gpio_t gpio, enum pull_enable enable,
enum pull_select select)
{
void *reg = GPIO_TO_IOCFG_BASE(gpio.base) + gpio.offset;
int bit = gpio.bit;
if (enable == GPIO_PULL_ENABLE) {
if (select == GPIO_PULL_DOWN)
setbits_le32(reg, 1 << (bit + 2));
else
clrbits_le32(reg, 1 << (bit + 2));
}
if (enable == GPIO_PULL_ENABLE)
clrsetbits_le32(reg, 3 << bit, 1 << bit);
else
clrbits_le32(reg, 3 << bit);
}
static void gpio_set_pull_en_sel(gpio_t gpio, enum pull_enable enable,
enum pull_select select)
{
void *reg = GPIO_TO_IOCFG_BASE(gpio.base) + gpio.offset;
int bit = gpio.bit;
if (enable == GPIO_PULL_ENABLE) {
if (select == GPIO_PULL_DOWN)
clrbits_le32(reg + SEL_OFFSET, 1 << bit);
else
setbits_le32(reg + SEL_OFFSET, 1 << bit);
}
if (enable == GPIO_PULL_ENABLE)
setbits_le32(reg + EN_OFFSET, 1 << bit);
else
clrbits_le32(reg + EN_OFFSET, 1 << bit);
}
void gpio_set_pull(gpio_t gpio, enum pull_enable enable,
enum pull_select select)
{
if (gpio.flag)
gpio_set_pull_pupd(gpio, enable, select);
else
gpio_set_pull_en_sel(gpio, enable, select);
}
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