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/*
* This file is part of the coreboot project.
*
* Copyright 2013 Google 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __SOC_NVIDIA_TEGRA_GPIO_H__
#define __SOC_NVIDIA_TEGRA_GPIO_H__
#include <stdint.h>
#include "pinmux.h"
/* Wrapper type for GPIOs. Always use GPIO() macro to generate. */
typedef u32 gpio_t;
#define GPIO_PINMUX_SHIFT 16
#define GPIO(name) ((gpio_t)(GPIO_##name##_INDEX | \
(PINMUX_GPIO_##name << GPIO_PINMUX_SHIFT)))
void __gpio_output(gpio_t gpio, int value, u32 open_drain);
void __gpio_input(gpio_t gpio, u32 pull);
/* Higher level function wrappers for common GPIO configurations. */
static inline void gpio_output(gpio_t gpio, int value)
{
__gpio_output(gpio, value, 0);
}
static inline void gpio_output_open_drain(gpio_t gpio, int value)
{
__gpio_output(gpio, value, PINMUX_OPEN_DRAIN);
}
static inline void gpio_input(gpio_t gpio)
{
__gpio_input(gpio, PINMUX_PULL_NONE);
}
static inline void gpio_input_pulldown(gpio_t gpio)
{
__gpio_input(gpio, PINMUX_PULL_DOWN);
}
static inline void gpio_input_pullup(gpio_t gpio)
{
__gpio_input(gpio, PINMUX_PULL_UP);
}
/* Functions to modify specific GPIO control values. */
enum gpio_mode {
GPIO_MODE_SPIO = 0,
GPIO_MODE_GPIO = 1
};
void gpio_set_mode(gpio_t gpio, enum gpio_mode);
int gpio_get_mode(gpio_t gpio);
// Lock a GPIO with extreme caution since they can't be unlocked.
void gpio_set_lock(gpio_t gpio);
int gpio_get_lock(gpio_t gpio);
void gpio_set_out_enable(gpio_t gpio, int enable);
int gpio_get_out_enable(gpio_t gpio);
void gpio_set_out_value(gpio_t gpio, int value);
int gpio_get_out_value(gpio_t gpio);
int gpio_get_in_value(gpio_t gpio);
int gpio_get_int_status(gpio_t gpio);
void gpio_set_int_enable(gpio_t gpio, int enable);
int gpio_get_int_enable(gpio_t gpio);
void gpio_set_int_level(gpio_t gpio, int high_rise, int edge, int delta);
void gpio_get_int_level(gpio_t gpio, int *high_rise, int *edge, int *delta);
void gpio_set_int_clear(gpio_t gpio);
#endif /* __SOC_NVIDIA_TEGRA_GPIO_H__ */
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