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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_PERIPHERAL_IO_INTERFACE_H
#define ANDROID_PERIPHERAL_IO_INTERFACE_H
#include <stdint.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#include <hardware/hardware.h>
__BEGIN_DECLS
/**
* Id of this module.
*/
#define PERIPHERAL_IO_HARDWARE_MODULE_ID "peripheral_io"
/**
* Possible GPIO direction configuration.
*/
typedef enum {
GPIO_DIRECTION_IN,
GPIO_DIRECTION_OUT_LOW,
GPIO_DIRECTION_OUT_HIGH
} gpio_direction_t;
typedef int (*pin_mux_cb)(const char* pin, const char* source);
typedef int (*pin_mux_directon_cb)(const char* pin, int dir);
typedef struct pin_mux_callbacks {
pin_mux_cb mux_cb;
pin_mux_directon_cb direction_cb;
} pin_mux_callbacks;
typedef struct peripheral_registration_cb_t {
// TODO(leecam): Fix up the comments.
// Pin Mux functions.
int (*register_pin)(const char* name, int gpio, pin_mux_callbacks callbacks);
int (*register_pin_group)(const char* name, char** pins, size_t nr_pins);
int (*register_source)(const char* name, char** groups, size_t nr_groups);
int (*register_simple_source)(const char* name, const char** pins, size_t nr_pins);
// Gpio functions.
int (*register_gpio_sysfs)(const char* name, uint32_t index);
int (*set_gpio_pin_mux)(const char* name, const char* source);
// Spi functions.
int (*register_spi_dev_bus)(const char* name, uint32_t bus, uint32_t cs);
int (*set_spi_pin_mux)(const char* name, const char* source);
// Led functions
int (*register_led_sysfs)(const char* name, const char* sysfs_name);
// I2c functions.
int (*register_i2c_dev_bus)(const char* name, uint32_t bus);
int (*set_i2c_pin_mux)(const char* name, const char* source);
} peripheral_registration_cb_t;
typedef struct peripheral_io_module_t peripheral_io_module_t;
struct peripheral_io_module_t {
struct hw_module_t common;
/**
* Register all available devices with the peripheral manager.
*
* Arguments:
* dev: Pointer to the peripheral_io module.
* callbacks: Callbacks into peripheral manager to add specific devices.
*
* Returns:
* 0 on success, errno on error.
*/
int (*register_devices)(const peripheral_io_module_t* dev,
const peripheral_registration_cb_t* callbacks);
};
__END_DECLS
#endif // ANDROID_PERIPHERAL_IO_INTERFACE_H
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