blob: 21d6dc4ab58e35bb4681cb6b92f8549617cdd7de [file] [log] [blame]
/*
* Copyright (C) 2018 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.
*/
#pragma once
#include <cstdint>
#define MAKE_TAG_CONSTANT(A, B, C, D) (((A) << 24) | ((B) << 16) | ((C) << 8) | (D))
#define HARDWARE_MODULE_TAG MAKE_TAG_CONSTANT('H', 'W', 'M', 'T')
#define HARDWARE_DEVICE_TAG MAKE_TAG_CONSTANT('H', 'W', 'D', 'T')
#define HARDWARE_MAKE_API_VERSION(maj, min) ((((maj)&0xff) << 8) | ((min)&0xff))
#define HARDWARE_HAL_API_VERSION HARDWARE_MAKE_API_VERSION(1, 0)
struct hw_module_methods_t;
struct hw_module_t {
uint32_t tag;
uint16_t module_api_version;
uint16_t hal_api_version;
const char* id;
const char* name;
const char* author;
hw_module_methods_t* methods;
void* dso;
#ifdef __LP64__
uint64_t reserved[32 - 7];
#else
uint32_t reserved[32 - 7];
#endif
};
struct hw_device_t {
uint32_t tag;
uint32_t version;
struct hw_module_t* module;
#ifdef __LP64__
uint64_t reserved[12];
#else
uint32_t reserved[12];
#endif
int (*close)(hw_device_t* device);
};
struct hw_module_methods_t {
int (*open)(const hw_module_t*, const char*, hw_device_t**);
};
extern "C" {
int hw_get_module(const char* id, const hw_module_t** module);
};