| /* |
| * 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 "i2c_manager.h" |
| |
| #include <base/logging.h> |
| |
| #include "pin_mux_manager.h" |
| |
| namespace android { |
| |
| std::unique_ptr<I2cManager> g_i2c_manager; |
| |
| I2cManager::I2cManager() {} |
| |
| I2cManager::~I2cManager() {} |
| |
| // static |
| I2cManager* I2cManager::GetI2cManager() { |
| if (!g_i2c_manager) { |
| g_i2c_manager.reset(new I2cManager()); |
| } |
| return g_i2c_manager.get(); |
| } |
| |
| // static |
| void I2cManager::ResetI2cManager() { |
| g_i2c_manager.reset(); |
| } |
| |
| bool I2cManager::RegisterI2cDevBus(const std::string& name, |
| uint32_t bus) { |
| if (i2cdev_buses_.count(name)) |
| return false; |
| i2cdev_buses_.emplace(name, I2cDevBus(bus)); |
| return true; |
| } |
| |
| std::vector<std::string> I2cManager::GetI2cDevBuses() { |
| std::vector<std::string> buses; |
| for (auto& i : i2cdev_buses_) |
| buses.push_back(i.first); |
| return buses; |
| } |
| |
| bool I2cManager::HasI2cDevBus(const std::string& name) { |
| return i2cdev_buses_.count(name); |
| } |
| |
| bool I2cManager::RegisterDriver( |
| std::unique_ptr<I2cDriverInfoBase> driver_info) { |
| std::string key = driver_info->Compat(); |
| driver_infos_[key] = std::move(driver_info); |
| return true; |
| } |
| |
| bool I2cManager::SetPinMux(const std::string& name, const std::string& mux) { |
| auto bus_it = i2cdev_buses_.find(name); |
| if (bus_it == i2cdev_buses_.end()) |
| return false; |
| bus_it->second.mux = mux; |
| bus_it->second.mux_group = mux; |
| return true; |
| } |
| |
| bool I2cManager::SetPinMuxWithGroup(const std::string& name, |
| const std::string& mux, |
| const std::string& group) { |
| auto bus_it = i2cdev_buses_.find(name); |
| if (bus_it == i2cdev_buses_.end()) |
| return false; |
| bus_it->second.mux = mux; |
| bus_it->second.mux_group = group; |
| return true; |
| } |
| |
| std::unique_ptr<I2cDevice> I2cManager::OpenI2cDevice(const std::string& name, uint32_t address) { |
| LOG(INFO) << "OpenI2cDevice " << name << " " << address; |
| // Get the Bus from the BSP. |
| auto bus_it = i2cdev_buses_.find(name); |
| if (bus_it == i2cdev_buses_.end()) |
| return nullptr; |
| |
| // Check its not already in use |
| if (bus_it->second.driver_.count(address)) { |
| return nullptr; |
| } |
| |
| // Find a driver. |
| // Currently there is only hardcoded support for I2CDEV |
| auto driver_info_it = driver_infos_.find("I2CDEV"); |
| |
| // Fail if there is no driver. |
| if (driver_info_it == driver_infos_.end()) |
| return nullptr; |
| |
| std::unique_ptr<I2cDriverInterface> driver(driver_info_it->second->Probe()); |
| |
| if (!driver->Init(bus_it->second.bus, address)) |
| return nullptr; |
| |
| // Set Pin muxing. |
| if (!bus_it->second.mux.empty()) { |
| PinMuxManager::GetPinMuxManager()->SetSource(bus_it->second.mux, |
| bus_it->second.mux_group); |
| } |
| |
| bus_it->second.driver_[address] = std::move(driver); |
| |
| return std::unique_ptr<I2cDevice>(new I2cDevice(&(bus_it->second), address)); |
| } |
| |
| } // namespace android |