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,const std::vector<std::string> & parentInvCompatible)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 const std::vector<std::string>& parentInvCompatible) :
30 deviceName(deviceName), gpioState(gpioState), ctx(ctx),
31 parentInventoryCompatible(parentInvCompatible)
32 {
33 for (size_t i = 0; i < gpioNames.size(); i++)
34 {
35 GPIO_POLARITY polarity =
36 (gpioValues[i] == 0) ? ACTIVE_LOW : ACTIVE_HIGH;
37 gpioPolarity[gpioNames[i]] = polarity;
38 }
39 }
40
updateGPIOPresence(const std::string & gpioLine)41 auto DevicePresence::updateGPIOPresence(const std::string& gpioLine) -> void
42 {
43 if (!gpioPolarity.contains(gpioLine))
44 {
45 return;
46 }
47
48 updateDbusInterfaces();
49 }
50
getObjPath() const51 auto DevicePresence::getObjPath() const -> sdbusplus::message::object_path
52 {
53 sdbusplus::message::object_path objPathBase(
54 "/xyz/openbmc_project/GPIODeviceDetected/");
55 sdbusplus::message::object_path objPath = objPathBase / deviceName;
56 return objPath;
57 }
58
isPresent()59 auto DevicePresence::isPresent() -> bool
60 {
61 for (auto& [name, polarity] : gpioPolarity)
62 {
63 if (!gpioState.contains(name))
64 {
65 error("GPIO {NAME} not in cached state", "NAME", name);
66 return false;
67 }
68
69 const bool state = gpioState.at(name);
70
71 if (state && polarity == ACTIVE_LOW)
72 {
73 return false;
74 }
75 if (!state && polarity == ACTIVE_HIGH)
76 {
77 return false;
78 }
79 }
80
81 return true;
82 }
83
updateDbusInterfaces()84 auto DevicePresence::updateDbusInterfaces() -> void
85 {
86 debug("Updating dbus interface for config {OBJPATH}", "OBJPATH",
87 deviceName);
88
89 const bool present = isPresent();
90 sdbusplus::message::object_path objPath = getObjPath();
91
92 if (present && !detectedIface)
93 {
94 info("Detected {NAME} as present, adding dbus interface", "NAME",
95 deviceName);
96
97 const std::string firstCompatible =
98 parentInventoryCompatible.empty() ? ""
99 : parentInventoryCompatible[0];
100
101 detectedIface = std::make_unique<DevicePresenceInterface>(
102 ctx, objPath.str.c_str(),
103 DevicePresenceProperties{deviceName, firstCompatible});
104
105 detectedIface->emit_added();
106 }
107
108 if (!present && detectedIface)
109 {
110 info("Detected {NAME} as absent, removing dbus interface", "NAME",
111 deviceName);
112 detectedIface->emit_removed();
113
114 detectedIface.reset();
115 }
116 }
117
118 } // namespace gpio_presence
119