1 /* 2 * Copyright (C) 2016 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 #include "wifi_hal/driver_tool.h" 18 19 #include <android-base/logging.h> 20 #include <private/android_filesystem_config.h> 21 22 #include "hardware_legacy/wifi.h" 23 24 namespace android { 25 namespace wifi_hal { 26 27 const int DriverTool::kFirmwareModeSta = WIFI_GET_FW_PATH_STA; 28 const int DriverTool::kFirmwareModeAp = WIFI_GET_FW_PATH_AP; 29 const int DriverTool::kFirmwareModeP2p = WIFI_GET_FW_PATH_P2P; 30 31 bool DriverTool::TakeOwnershipOfFirmwareReload() { 32 if (!wifi_get_fw_path(kFirmwareModeSta) && 33 !wifi_get_fw_path(kFirmwareModeAp) && 34 !wifi_get_fw_path(kFirmwareModeP2p)) { 35 return true; // HAL doesn't think we need to load firmware for any mode. 36 } 37 38 if (chown(WIFI_DRIVER_FW_PATH_PARAM, AID_WIFI, AID_WIFI) != 0) { 39 PLOG(ERROR) << "Error changing ownership of '" << WIFI_DRIVER_FW_PATH_PARAM 40 << "' to wifi:wifi"; 41 return false; 42 } 43 44 return true; 45 } 46 47 bool DriverTool::LoadDriver() { 48 return ::wifi_load_driver() == 0; 49 } 50 51 bool DriverTool::UnloadDriver() { 52 return ::wifi_unload_driver() == 0; 53 } 54 55 bool DriverTool::IsDriverLoaded() { 56 return ::wifi_unload_driver() != 0; 57 } 58 59 bool DriverTool::IsFirmwareModeChangeNeeded(int mode) { 60 return (wifi_get_fw_path(mode) != nullptr); 61 } 62 63 bool DriverTool::ChangeFirmwareMode(int mode) { 64 const char* fwpath = wifi_get_fw_path(mode); 65 if (!fwpath) { 66 return true; // HAL doesn't think we need to load firmware for this mode. 67 } 68 if (wifi_change_fw_path(fwpath) != 0) { 69 // Not all devices actually require firmware reloads, but 70 // failure to change the firmware path when it is defined is an error. 71 return false; 72 } 73 return true; 74 } 75 76 } // namespace wifi_hal 77 } // namespace android 78
