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/*
* Copyright (C) 2016 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.
*/
#include "uart_manager.h"
#include "uart_driver_sysfs.h"
#include <base/logging.h>
namespace android {
std::unique_ptr<UartManager> g_uart_manager;
UartManager* UartManager::GetManager() {
if (!g_uart_manager) {
g_uart_manager.reset(new UartManager);
}
return g_uart_manager.get();
}
void UartManager::ResetManager() {
g_uart_manager.reset();
}
UartManager::UartManager() {}
UartManager::~UartManager() {}
bool UartManager::RegisterDriver(
std::unique_ptr<UartDriverInfoBase> driver_info) {
std::string key = driver_info->Compat();
driver_infos_[key] = std::move(driver_info);
return true;
}
bool UartManager::RegisterUartDevice(const std::string& name,
const std::string& uart_device_name) {
if (uart_devices_.count(name)) {
LOG(ERROR) << "Uart device " << name << " is already registered";
return false;
}
uart_devices_[name].name = name;
uart_devices_[name].path = uart_device_name;
return true;
}
bool UartManager::SetPinMux(const std::string& name,
const std::string& pin_mux) {
auto bus_it = uart_devices_.find(name);
if (bus_it == uart_devices_.end()) {
LOG(ERROR) << "Uart device " << name << " is not registered";
return false;
}
bus_it->second.mux = pin_mux;
return true;
}
std::vector<std::string> UartManager::GetDevicesList() {
std::vector<std::string> list;
for (const auto& it : uart_devices_) {
list.push_back(it.first);
}
return list;
}
bool UartManager::HasUartDevice(const std::string& name) {
return uart_devices_.count(name);
}
std::unique_ptr<UartDevice> UartManager::OpenUartDevice(
const std::string& name) {
// Get the Bus from the BSP.
auto bus_it = uart_devices_.find(name);
if (bus_it == uart_devices_.end())
return nullptr;
// Check its not already in use
if (bus_it->second.driver_)
return nullptr;
// Find a driver.
// Currently there is only hardcoded support for UARTSYSFS
auto driver_info_it = driver_infos_.find(UartDriverSysfs::Compat());
// Fail if there is no driver.
if (driver_info_it == driver_infos_.end())
return nullptr;
std::unique_ptr<UartDriverInterface> driver(driver_info_it->second->Probe());
if (!driver->Init(bus_it->second.path))
return nullptr;
// Set Pin muxing.
if (!bus_it->second.mux.empty()) {
PinMuxManager::GetPinMuxManager()->SetSource(bus_it->second.mux,
bus_it->second.mux);
}
bus_it->second.driver_ = std::move(driver);
return std::unique_ptr<UartDevice>(new UartDevice(&(bus_it->second)));
}
} // namespace android
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