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#include <fcntl.h>
#include <fstream>
#include <libevdev/libevdev.h>
#include <phosphor-logging/elog.hpp>
#include <phosphor-logging/log.hpp>
#include <phosphor-logging/elog-errors.hpp>
#include "xyz/openbmc_project/Common/error.hpp"
#include "gpio_presence.hpp"
namespace phosphor
{
namespace gpio
{
namespace presence
{
using namespace phosphor::logging;
using namespace sdbusplus::xyz::openbmc_project::Common::Error;
constexpr auto INVENTORY_PATH = "/xyz/openbmc_project/inventory";
constexpr auto INVENTORY_INTF = "xyz.openbmc_project.Inventory.Manager";
constexpr auto MAPPER_BUSNAME = "xyz.openbmc_project.ObjectMapper";
constexpr auto MAPPER_PATH = "/xyz/openbmc_project/object_mapper";
constexpr auto MAPPER_INTERFACE = "xyz.openbmc_project.ObjectMapper";
std::string getService(const std::string& path,
const std::string& interface,
sdbusplus::bus::bus& bus)
{
auto mapperCall = bus.new_method_call(MAPPER_BUSNAME,
MAPPER_PATH,
MAPPER_INTERFACE,
"GetObject");
mapperCall.append(path);
mapperCall.append(std::vector<std::string>({interface}));
auto mapperResponseMsg = bus.call(mapperCall);
if (mapperResponseMsg.is_method_error())
{
log<level::ERR>("Error in mapper call to get service name",
entry("PATH=%s", path.c_str()),
entry("INTERFACE=%s", interface.c_str()));
elog<InternalFailure>();
}
std::map<std::string, std::vector<std::string>> mapperResponse;
mapperResponseMsg.read(mapperResponse);
if (mapperResponse.empty())
{
log<level::ERR>(
"Error in mapper response for getting service name",
entry("PATH=%s", path.c_str()),
entry("INTERFACE=%s", interface.c_str()));
elog<InternalFailure>();
}
return mapperResponse.begin()->first;
}
void Presence::determinePresence()
{
auto present = false;
auto value = static_cast<int>(0);
auto fetch_rc = libevdev_fetch_event_value(devicePtr.get(), EV_KEY,
key, &value);
if (0 == fetch_rc)
{
log<level::ERR>("Device does not support event type",
entry("KEYCODE=%d", key));
elog<InternalFailure>();
return;
}
if (value > 0)
{
present = true;
}
updateInventory(present);
}
// Callback handler when there is an activity on the FD
int Presence::processEvents(sd_event_source* es, int fd,
uint32_t revents, void* userData)
{
auto presence = static_cast<Presence*>(userData);
presence->analyzeEvent();
return 0;
}
// Analyzes the GPIO event
void Presence::analyzeEvent()
{
// Data returned
struct input_event ev {};
int rc = 0;
// While testing, observed that not having a loop here was leading
// into events being missed.
while (rc >= 0)
{
// Wait until no more events are available on the device.
rc = libevdev_next_event(devicePtr.get(),
LIBEVDEV_READ_FLAG_NORMAL, &ev);
if (rc < 0)
{
// There was an error waiting for events, mostly that there are no
// events to be read.. So continue waiting...
return;
}
if (rc == LIBEVDEV_READ_STATUS_SUCCESS)
{
if (ev.type == EV_SYN && ev.code == SYN_REPORT)
{
continue;
}
else if (ev.code == key)
{
auto present = false;
if (ev.value > 0)
{
present = true;
}
updateInventory(present);
bindOrUnbindDrivers(present);
}
}
}
return;
}
Presence::ObjectMap Presence::getObjectMap(bool present)
{
ObjectMap invObj;
InterfaceMap invIntf;
PropertyMap invProp;
invProp.emplace("Present", present);
invProp.emplace("PrettyName", name);
invIntf.emplace("xyz.openbmc_project.Inventory.Item",
std::move(invProp));
invObj.emplace(std::move(inventory), std::move(invIntf));
return invObj;
}
void Presence::updateInventory(bool present)
{
ObjectMap invObj = getObjectMap(present);
log<level::INFO>("Updating inventory present property",
entry("PRESENT=%d", present),
entry("PATH=%s", inventory.c_str()));
auto invService = getService(INVENTORY_PATH, INVENTORY_INTF, bus);
// Update inventory
auto invMsg = bus.new_method_call(invService.c_str(),
INVENTORY_PATH,
INVENTORY_INTF,
"Notify");
invMsg.append(std::move(invObj));
auto invMgrResponseMsg = bus.call(invMsg);
if (invMgrResponseMsg.is_method_error())
{
log<level::ERR>(
"Error in inventory manager call to update inventory");
elog<InternalFailure>();
}
}
void Presence::bindOrUnbindDrivers(bool present)
{
auto action = (present) ? "bind" : "unbind";
for (auto& driver : drivers)
{
auto path = std::get<pathField>(driver) / action;
auto device = std::get<deviceField>(driver);
if (present)
{
log<level::INFO>(
"Binding a device driver",
entry("PATH=%s", path.c_str()),
entry("DEVICE=%s", device.c_str()));
}
else
{
log<level::INFO>(
"Unbinding a device driver",
entry("PATH=%s", path.c_str()),
entry("DEVICE=%s", device.c_str()));
}
std::ofstream file;
file.exceptions(
std::ofstream::failbit |
std::ofstream::badbit |
std::ofstream::eofbit);
try
{
file.open(path);
file << device;
file.close();
}
catch (std::exception& e)
{
auto err = errno;
log<level::ERR>("Failed binding or unbinding a device "
"after a card was removed or added",
entry("PATH=%s", path.c_str()),
entry("DEVICE=%s", device.c_str()),
entry("ERRNO=%d", err));
}
}
}
} // namespace presence
} // namespace gpio
} // namespace phosphor
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