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/*
* Copyright (C) 2023 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.
*/
#define LOG_TAG "libpixelusb-common"
#include "include/pixelusb/CommonUtils.h"
#include <android-base/file.h>
#include <android-base/properties.h>
#include <sys/epoll.h>
#include <sys/eventfd.h>
#include <sys/inotify.h>
#include <utils/Log.h>
#include <chrono>
#include <memory>
#include <mutex>
namespace android {
namespace hardware {
namespace google {
namespace pixel {
namespace usb {
using ::android::base::GetProperty;
using ::android::base::SetProperty;
using ::android::base::WriteStringToFile;
using ::std::chrono::microseconds;
using ::std::chrono::steady_clock;
using ::std::literals::chrono_literals::operator""ms;
int addEpollFd(const base::unique_fd &epfd, const base::unique_fd &fd) {
struct epoll_event event;
int ret;
event.data.fd = fd;
event.events = EPOLLIN;
ret = epoll_ctl(epfd, EPOLL_CTL_ADD, fd, &event);
if (ret)
ALOGE("epoll_ctl error %d", errno);
return ret;
}
std::string getVendorFunctions() {
if (GetProperty(kBuildType, "") == "user")
return "user";
std::string bootMode = GetProperty(PERSISTENT_BOOT_MODE, "");
std::string persistVendorFunctions = GetProperty(kPersistentVendorConfig, "");
std::string vendorFunctions = GetProperty(kVendorConfig, "");
std::string ret = "";
if (vendorFunctions != "") {
ret = vendorFunctions;
} else if (bootMode == "usbradio" || bootMode == "factory" || bootMode == "ffbm-00" ||
bootMode == "ffbm-01" || bootMode == "usbuwb") {
if (persistVendorFunctions != "")
ret = persistVendorFunctions;
else
ret = "diag";
// vendor.usb.config will reflect the current configured functions
SetProperty(kVendorConfig, ret);
}
return ret;
}
int unlinkFunctions(const char *path) {
DIR *config = opendir(path);
struct dirent *function;
char filepath[kMaxFilePathLength];
int ret = 0;
if (config == NULL)
return -1;
// d_type does not seems to be supported in /config
// so filtering by name.
while (((function = readdir(config)) != NULL)) {
if ((strstr(function->d_name, FUNCTION_NAME) == NULL))
continue;
// build the path for each file in the folder.
snprintf(filepath, kMaxFilePathLength, "%s/%s", path, function->d_name);
ret = remove(filepath);
if (ret) {
ALOGE("Unable remove file %s errno:%d", filepath, errno);
break;
}
}
closedir(config);
return ret;
}
int linkFunction(const char *function, int index) {
char functionPath[kMaxFilePathLength];
char link[kMaxFilePathLength];
snprintf(functionPath, kMaxFilePathLength, "%s%s", FUNCTIONS_PATH, function);
snprintf(link, kMaxFilePathLength, "%s%d", FUNCTION_PATH, index);
if (symlink(functionPath, link)) {
ALOGE("Cannot create symlink %s -> %s errno:%d", link, functionPath, errno);
return -1;
}
return 0;
}
bool setVidPidCommon(const char *vid, const char *pid) {
if (!WriteStringToFile(vid, VENDOR_ID_PATH))
return false;
if (!WriteStringToFile(pid, PRODUCT_ID_PATH))
return false;
return true;
}
bool resetGadgetCommon() {
ALOGI("setCurrentUsbFunctions None");
if (!WriteStringToFile("none", PULLUP_PATH))
ALOGI("Gadget cannot be pulled down");
if (!WriteStringToFile("0", DEVICE_CLASS_PATH))
return false;
if (!WriteStringToFile("0", DEVICE_SUB_CLASS_PATH))
return false;
if (!WriteStringToFile("0", DEVICE_PROTOCOL_PATH))
return false;
if (!WriteStringToFile("0", DESC_USE_PATH))
return false;
if (unlinkFunctions(CONFIG_PATH))
return false;
return true;
}
} // namespace usb
} // namespace pixel
} // namespace google
} // namespace hardware
} // namespace android
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