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/*
* This file is part of the coreboot project.
*
* Copyright 2016 Rockchip 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>
#include <soc/addressmap.h>
#include <soc/gpio.h>
#include <soc/grf.h>
#include <soc/soc.h>
#include <stdlib.h>
struct rockchip_gpio_regs *gpio_port[] = {
(struct rockchip_gpio_regs *)GPIO0_BASE,
(struct rockchip_gpio_regs *)GPIO1_BASE,
(struct rockchip_gpio_regs *)GPIO2_BASE,
(struct rockchip_gpio_regs *)GPIO3_BASE,
(struct rockchip_gpio_regs *)GPIO4_BASE,
};
#define PMU_GPIO_PORT0 0
#define PMU_GPIO_PORT1 1
int is_pmu_gpio(gpio_t gpio)
{
if (gpio.port == PMU_GPIO_PORT0 || gpio.port == PMU_GPIO_PORT1)
return 1;
return 0;
}
void *gpio_grf_reg(gpio_t gpio)
{
if (is_pmu_gpio(gpio))
return &rk3399_pmugrf->gpio0_p[gpio.port][gpio.bank];
/* There are two pmu gpio, 0 and 1, so " - 2" */
return &rk3399_grf->gpio2_p[(gpio.port - 2)][gpio.bank];
}
#define IS_GPIO_BANK(g, p, b) (g.port == p && g.bank == GPIO_##b)
enum {
PULLNONE_1V8 = 0,
PULLDOWN_1V8 = 1,
PULLUP_1V8 = 3,
};
u32 gpio_get_pull_val(gpio_t gpio, enum gpio_pull pull)
{
/* The default pull bias setting defined in soc/gpio.h */
u32 pull_val = pull;
/* GPIO0_A, GPIO0_B, GPIO2_C, GPIO2_D use the 1V8 pull bias setting.
* Defined in TRM V.03 Part1 Page 331 and Page 458
*/
if (IS_GPIO_BANK(gpio, 0, A) || IS_GPIO_BANK(gpio, 0, B) ||
IS_GPIO_BANK(gpio, 2, C) || IS_GPIO_BANK(gpio, 2, D)) {
switch (pull) {
case GPIO_PULLUP:
pull_val = PULLUP_1V8;
break;
case GPIO_PULLDOWN:
pull_val = PULLDOWN_1V8;
break;
case GPIO_PULLNONE:
pull_val = PULLNONE_1V8;
}
}
return pull_val;
}
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