1 /**
2 * Copyright © 2024 IBM Corporation
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "device_finder.hpp"
18
19 #include <phosphor-logging/lg2.hpp>
20
21 #include <exception>
22 #include <format>
23 #include <stdexcept>
24 #include <utility>
25 #include <variant>
26 #include <vector>
27
28 namespace phosphor::power::sequencer
29 {
30
31 const std::string deviceInterfacesService = "xyz.openbmc_project.EntityManager";
32
33 const std::vector<std::string> deviceInterfaces{
34 "xyz.openbmc_project.Configuration.UCD90160",
35 "xyz.openbmc_project.Configuration.UCD90320"};
36
37 const std::string typeProperty = "Type";
38 const std::string nameProperty = "Name";
39 const std::string busProperty = "Bus";
40 const std::string addressProperty = "Address";
41
DeviceFinder(sdbusplus::bus_t & bus,Callback callback)42 DeviceFinder::DeviceFinder(sdbusplus::bus_t& bus, Callback callback) :
43 callback{std::move(callback)}
44 {
45 interfacesFinder = std::make_unique<DBusInterfacesFinder>(
46 bus, deviceInterfacesService, deviceInterfaces,
47 std::bind_front(&DeviceFinder::interfaceFoundCallback, this));
48 }
49
interfaceFoundCallback(const std::string & path,const std::string & interface,const DbusPropertyMap & properties)50 void DeviceFinder::interfaceFoundCallback(
51 [[maybe_unused]] const std::string& path, const std::string& interface,
52 const DbusPropertyMap& properties)
53 {
54 try
55 {
56 DeviceProperties device{};
57
58 auto value = getPropertyValue(properties, typeProperty);
59 device.type = std::get<std::string>(value);
60
61 value = getPropertyValue(properties, nameProperty);
62 device.name = std::get<std::string>(value);
63
64 value = getPropertyValue(properties, busProperty);
65 device.bus = static_cast<uint8_t>(std::get<uint64_t>(value));
66
67 value = getPropertyValue(properties, addressProperty);
68 device.address = static_cast<uint16_t>(std::get<uint64_t>(value));
69
70 callback(device);
71 }
72 catch (const std::exception& e)
73 {
74 lg2::error(
75 "Unable to obtain properties of interface {INTERFACE}: {ERROR}",
76 "INTERFACE", interface, "ERROR", e);
77 }
78 }
79
80 const DbusVariant&
getPropertyValue(const DbusPropertyMap & properties,const std::string & propertyName)81 DeviceFinder::getPropertyValue(const DbusPropertyMap& properties,
82 const std::string& propertyName)
83 {
84 auto it = properties.find(propertyName);
85 if (it == properties.end())
86 {
87 throw std::runtime_error{
88 std::format("{} property not found", propertyName)};
89 }
90 return it->second;
91 }
92
93 } // namespace phosphor::power::sequencer
94