1 /*
2 * SPDX-FileCopyrightText: Copyright (c) 2022-2024. All rights
3 * reserved. SPDX-License-Identifier: Apache-2.0
4 */
5
6 #include "device_presence.hpp"
7
8 #include <phosphor-logging/lg2.hpp>
9 #include <sdbusplus/message/native_types.hpp>
10 #include <xyz/openbmc_project/Configuration/GPIODeviceDetect/client.hpp>
11 #include <xyz/openbmc_project/Configuration/GPIODeviceDetect/common.hpp>
12 #include <xyz/openbmc_project/Inventory/Source/DevicePresence/aserver.hpp>
13
14 #include <string>
15 #include <vector>
16
17 PHOSPHOR_LOG2_USING;
18
19 using DevicePresenceProperties = sdbusplus::common::xyz::openbmc_project::
20 inventory::source::DevicePresence::properties_t;
21
22 namespace gpio_presence
23 {
24
DevicePresence(sdbusplus::async::context & ctx,const std::vector<std::string> & gpioNames,const std::vector<uint64_t> & gpioValues,const std::string & deviceName,const std::unordered_map<std::string,bool> & gpioState)25 DevicePresence::DevicePresence(
26 sdbusplus::async::context& ctx, const std::vector<std::string>& gpioNames,
27 const std::vector<uint64_t>& gpioValues, const std::string& deviceName,
28 const std::unordered_map<std::string, bool>& gpioState) :
29 deviceName(deviceName), gpioState(gpioState), ctx(ctx)
30 {
31 for (size_t i = 0; i < gpioNames.size(); i++)
32 {
33 GPIO_POLARITY polarity =
34 (gpioValues[i] == 0) ? ACTIVE_LOW : ACTIVE_HIGH;
35 gpioPolarity[gpioNames[i]] = polarity;
36 }
37 }
38
updateGPIOPresence(const std::string & gpioLine)39 auto DevicePresence::updateGPIOPresence(const std::string& gpioLine) -> void
40 {
41 if (!gpioPolarity.contains(gpioLine))
42 {
43 return;
44 }
45
46 updateDbusInterfaces();
47 }
48
getObjPath() const49 auto DevicePresence::getObjPath() const -> sdbusplus::message::object_path
50 {
51 sdbusplus::message::object_path objPathBase(
52 "/xyz/openbmc_project/GPIODeviceDetected/");
53 sdbusplus::message::object_path objPath = objPathBase / deviceName;
54 return objPath;
55 }
56
isPresent()57 auto DevicePresence::isPresent() -> bool
58 {
59 for (auto& [name, polarity] : gpioPolarity)
60 {
61 if (!gpioState.contains(name))
62 {
63 error("GPIO {NAME} not in cached state", "NAME", name);
64 return false;
65 }
66
67 const bool state = gpioState.at(name);
68
69 if (state && polarity == ACTIVE_LOW)
70 {
71 return false;
72 }
73 if (!state && polarity == ACTIVE_HIGH)
74 {
75 return false;
76 }
77 }
78
79 return true;
80 }
81
updateDbusInterfaces()82 auto DevicePresence::updateDbusInterfaces() -> void
83 {
84 debug("Updating dbus interface for config {OBJPATH}", "OBJPATH",
85 deviceName);
86
87 const bool present = isPresent();
88 sdbusplus::message::object_path objPath = getObjPath();
89
90 if (present && !detectedIface)
91 {
92 info("Detected {NAME} as present, adding dbus interface", "NAME",
93 deviceName);
94
95 detectedIface = std::make_unique<DevicePresenceInterface>(
96 ctx, objPath.str.c_str(), DevicePresenceProperties{deviceName});
97
98 detectedIface->emit_added();
99 }
100
101 if (!present && detectedIface)
102 {
103 info("Detected {NAME} as absent, removing dbus interface", "NAME",
104 deviceName);
105 detectedIface->emit_removed();
106
107 detectedIface.reset();
108 }
109 }
110
111 } // namespace gpio_presence
112