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
24namespace android {
25namespace wifi_hal {
26
27const int DriverTool::kFirmwareModeSta = WIFI_GET_FW_PATH_STA;
28const int DriverTool::kFirmwareModeAp = WIFI_GET_FW_PATH_AP;
29const int DriverTool::kFirmwareModeP2p = WIFI_GET_FW_PATH_P2P;
30
31bool 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
47bool DriverTool::LoadDriver() {
48  return ::wifi_load_driver() == 0;
49}
50
51bool DriverTool::UnloadDriver() {
52  return ::wifi_unload_driver() == 0;
53}
54
55bool DriverTool::IsDriverLoaded() {
56  return ::wifi_unload_driver() != 0;
57}
58
59bool DriverTool::IsFirmwareModeChangeNeeded(int mode) {
60  return (wifi_get_fw_path(mode) != nullptr);
61}
62
63bool 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