1 /* 2 * Copyright (c) 2022-2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 /** 17 * @addtogroup DriverHdi 18 * @{ 19 * 20 * @brief Provides APIs for a system ability to obtain hardware device interface (HDI) services, 21 * load or unload a device, and listen for service status, and capabilities for the hdi-gen tool to 22 * automatically generate code in the interface description language (IDL). 23 * 24 * The HDF and the IDL code generated allow system abilities to access the HDI driver service. 25 * 26 * @since 1.0 27 */ 28 29 /** 30 * @file hdi_support.h 31 * 32 * @brief Defines APIs for loading and unloading an HDI driver. 33 * 34 * @since 1.0 35 */ 36 37 #ifndef HDF_HDI_SUPPORT_H 38 #define HDF_HDI_SUPPORT_H 39 40 #include "hdf_base.h" 41 42 #ifdef __cplusplus 43 extern "C" { 44 #endif /* __cplusplus */ 45 /** 46 * @brief Loads the HDI driver of a service module. 47 * This API obtains the driver name based on the interface descriptor and service name, 48 * and then loads the device driver to the system. 49 * 50 * @param desc Indicates the pointer to the HDI descriptor. 51 * @param serviceName Indicates the service name of the driver to load. 52 * @return Returns the HDI driver object. 53 */ 54 void *LoadHdiImpl(const char *desc, const char *serviceName); 55 56 /** 57 * @brief Unloads the HDI driver of a service module. 58 * 59 * This API obtains the driver name based on the interface descriptor and service name, 60 * and then calls <b>unload()</b> of the driver to unload the driver. 61 * @param desc Indicates the pointer to the HDI descriptor. 62 * @param serviceName Indicates the service name of the driver to unload. 63 * @param impl Indicates the pointer to the HDI driver object to unload. 64 */ 65 void UnloadHdiImpl(const char *desc, const char *serviceName, void *impl); 66 #ifdef __cplusplus 67 } 68 #endif /* __cplusplus */ 69 70 #endif /* HDF_HDI_SUPPORT_H */ 71