| /* |
| * 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 "spi_manager.h" |
| |
| #include "pin_mux_manager.h" |
| |
| namespace android { |
| |
| std::unique_ptr<SpiManager> g_spi_manager; |
| |
| SpiManager::SpiManager() {} |
| |
| SpiManager::~SpiManager() {} |
| |
| // static |
| SpiManager* SpiManager::GetSpiManager() { |
| if (!g_spi_manager) { |
| g_spi_manager.reset(new SpiManager()); |
| } |
| return g_spi_manager.get(); |
| } |
| |
| // static |
| void SpiManager::ResetSpiManager() { |
| g_spi_manager.reset(); |
| } |
| |
| bool SpiManager::RegisterSpiDevBus(const std::string& name, |
| uint32_t bus, |
| uint32_t cs) { |
| if (spidev_buses_.count(name)) |
| return false; |
| spidev_buses_.emplace(name, SpiDevBus(bus, cs)); |
| return true; |
| } |
| |
| std::vector<std::string> SpiManager::GetSpiDevBuses() { |
| std::vector<std::string> buses; |
| for (auto& i : spidev_buses_) |
| buses.push_back(i.first); |
| return buses; |
| } |
| |
| bool SpiManager::HasSpiDevBus(const std::string& name) { |
| return spidev_buses_.count(name); |
| } |
| |
| bool SpiManager::RegisterDriver( |
| std::unique_ptr<SpiDriverInfoBase> driver_info) { |
| std::string key = driver_info->Compat(); |
| driver_infos_[key] = std::move(driver_info); |
| return true; |
| } |
| |
| bool SpiManager::SetPinMux(const std::string& name, const std::string& mux) { |
| auto bus_it = spidev_buses_.find(name); |
| if (bus_it == spidev_buses_.end()) |
| return false; |
| bus_it->second.mux = mux; |
| bus_it->second.mux_group = mux; |
| return true; |
| } |
| |
| bool SpiManager::SetPinMuxWithGroup(const std::string& name, |
| const std::string& mux, |
| const std::string& group) { |
| auto bus_it = spidev_buses_.find(name); |
| if (bus_it == spidev_buses_.end()) |
| return false; |
| bus_it->second.mux = mux; |
| bus_it->second.mux_group = group; |
| return true; |
| } |
| |
| std::unique_ptr<SpiDevice> SpiManager::OpenSpiDevice(const std::string& name) { |
| // Get the Bus from the BSP. |
| auto bus_it = spidev_buses_.find(name); |
| if (bus_it == spidev_buses_.end()) |
| return nullptr; |
| |
| // Check its not alread in use |
| if (bus_it->second.driver_) { |
| return nullptr; |
| } |
| |
| // Find a driver. |
| // Currently there is only hardcoded support for SPIDEV |
| auto driver_info_it = driver_infos_.find("SPIDEV"); |
| |
| // Fail if there is no driver. |
| if (driver_info_it == driver_infos_.end()) |
| return nullptr; |
| |
| std::unique_ptr<SpiDriverInterface> driver(driver_info_it->second->Probe()); |
| |
| if (!driver->Init(bus_it->second.bus, bus_it->second.cs)) |
| 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_ = std::move(driver); |
| |
| return std::unique_ptr<SpiDevice>(new SpiDevice(&(bus_it->second))); |
| } |
| |
| } // namespace android |