1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 * 16 */ 17 18 #include <dlfcn.h> 19 #include <stdint.h> 20 #include <stdio.h> 21 #include <string.h> 22 #include <unistd.h> 23 24 #define LOG_TAG "ese-sh" 25 #include <ese/ese.h> 26 #include <ese/log.h> 27 28 #include "hw.h" 29 30 void print_supported_hardware(const struct SupportedHardware *supported) { 31 printf("Supported hardware:\n"); 32 for (size_t i = 0; i < supported->len; ++i) { 33 printf("\t%s\t(%s / %s)\n", supported->hw[i].name, supported->hw[i].sym, 34 supported->hw[i].lib); 35 } 36 } 37 38 int find_supported_hardware(const struct SupportedHardware *supported, 39 const char *name) { 40 for (size_t i = 0; i < supported->len; ++i) { 41 if (!strcmp(name, supported->hw[i].name)) { 42 return (int)i; 43 } 44 } 45 return -1; 46 } 47 48 /* This should be C++. */ 49 void release_hardware(const struct Hardware *hw) { 50 void *hw_handle = dlopen(hw->lib, RTLD_NOW); 51 /* Close for the above open and the original. */ 52 dlclose(hw_handle); 53 dlclose(hw_handle); 54 } 55 56 bool initialize_hardware(struct EseInterface *ese, const struct Hardware *hw) { 57 void *hw_handle = dlopen(hw->lib, RTLD_NOW); 58 if (!hw_handle) { 59 fprintf(stderr, "Failed to open hardware implementation: %s\n", dlerror()); 60 return false; 61 } 62 const struct EseOperations **hw_ops = dlsym(hw_handle, hw->sym); 63 if (!hw_ops) { 64 fprintf(stderr, "Failed to find hardware implementation: %s\n", dlerror()); 65 return false; 66 } 67 /* N.b., ese_init appends _ops to the second argument. */ 68 ese_init(ese, *hw); 69 return true; 70 } 71
