1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/*
* 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
|
