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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.
*/
#ifndef SYSTEM_PERIPHERALMANAGER_DAEMON_I2C_MANAGER_H_
#define SYSTEM_PERIPHERALMANAGER_DAEMON_I2C_MANAGER_H_
#include <stdint.h>
#include <map>
#include <memory>
#include <string>
#include <vector>
#include <base/macros.h>
#include "peripheralmanager/constants.h"
#include "pin_mux_manager.h"
#include "i2c_driver.h"
namespace android {
struct I2cDevBus {
explicit I2cDevBus(uint32_t b) : bus(b) {}
uint32_t bus;
std::string mux;
std::string mux_group;
std::map<uint32_t, std::unique_ptr<I2cDriverInterface>> driver_;
};
class I2cDevice {
public:
I2cDevice(I2cDevBus* bus, uint32_t address) : bus_(bus), address_(address) {}
~I2cDevice() {
if (!bus_->mux.empty()) {
PinMuxManager::GetPinMuxManager()->ReleaseSource(bus_->mux,
bus_->mux_group);
}
bus_->driver_.erase(address_);
}
int32_t Read(void* data, uint32_t size, uint32_t* bytes_read) {
return bus_->driver_[address_]->Read(data, size, bytes_read);
}
int32_t ReadRegByte(uint8_t reg, uint8_t* val) {
return bus_->driver_[address_]->ReadRegByte(reg, val);
}
int32_t ReadRegWord(uint8_t reg, uint16_t* val) {
return bus_->driver_[address_]->ReadRegWord(reg, val);
}
int32_t ReadRegBuffer(uint8_t reg,
uint8_t* data,
uint32_t size,
uint32_t* bytes_read) {
return bus_->driver_[address_]->ReadRegBuffer(reg, data, size, bytes_read);
}
int32_t Write(const void* data, uint32_t size, uint32_t* bytes_written) {
return bus_->driver_[address_]->Write(data, size, bytes_written);
}
int32_t WriteRegByte(uint8_t reg, uint8_t val) {
return bus_->driver_[address_]->WriteRegByte(reg, val);
}
int32_t WriteRegWord(uint8_t reg, uint16_t val) {
return bus_->driver_[address_]->WriteRegWord(reg, val);
}
int32_t WriteRegBuffer(uint8_t reg,
const uint8_t* data,
uint32_t size,
uint32_t* bytes_written) {
return bus_->driver_[address_]->WriteRegBuffer(
reg, data, size, bytes_written);
}
private:
I2cDevBus* bus_;
uint32_t address_;
};
class I2cManager {
public:
friend class I2cManagerTest;
~I2cManager();
// Get the singleton.
static I2cManager* GetI2cManager();
// Resets the global I2c manager (used for testing).
static void ResetI2cManager();
bool RegisterI2cDevBus(const std::string& name, uint32_t bus);
std::vector<std::string> GetI2cDevBuses();
bool HasI2cDevBus(const std::string& name);
bool SetPinMux(const std::string& name, const std::string& mux);
bool SetPinMuxWithGroup(const std::string& name,
const std::string& mux,
const std::string& group);
bool RegisterDriver(std::unique_ptr<I2cDriverInfoBase> driver_info);
std::unique_ptr<I2cDevice> OpenI2cDevice(const std::string& name,
uint32_t address);
private:
I2cManager();
std::map<std::string, std::unique_ptr<I2cDriverInfoBase>> driver_infos_;
std::map<std::string, I2cDevBus> i2cdev_buses_;
DISALLOW_COPY_AND_ASSIGN(I2cManager);
};
} // namespace android
#endif // SYSTEM_PERIPHERALMANAGER_DAEMON_I2C_MANAGER_H_
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