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#include "config.h"
#include "i2c_occ.hpp"
#include <algorithm>
#include <cassert>
#include <fstream>
#ifdef I2C_OCC
namespace i2c_occ
{
namespace fs = std::experimental::filesystem;
// The occ_master sysfs file
constexpr auto OCC_MASTER_FILE = "occ_master";
// The device name's length, e.g. "p8-occ-hwmon"
constexpr auto DEVICE_NAME_LENGTH = 12;
// The occ name's length, e.g. "occ"
constexpr auto OCC_NAME_LENGTH = 3;
// static assert to make sure the i2c occ device name is expected
static_assert(sizeof(I2C_OCC_DEVICE_NAME) - 1 == DEVICE_NAME_LENGTH);
static_assert(sizeof(OCC_NAME) - 1 == OCC_NAME_LENGTH);
static bool isMasterOcc(const fs::directory_entry& p)
{
auto f = p / OCC_MASTER_FILE;
auto str = getFileContent(f);
return (!str.empty()) && (str[0] == '1');
}
std::string getFileContent(const fs::path& f)
{
std::string ret(DEVICE_NAME_LENGTH, 0);
std::ifstream ifs(f.c_str(), std::ios::binary);
if (ifs.is_open())
{
ifs.read(&ret[0], DEVICE_NAME_LENGTH);
ret.resize(ifs.gcount());
}
return ret;
}
std::vector<std::string> getOccHwmonDevices(const char* path)
{
std::vector<std::string> result{};
if (fs::is_directory(path))
{
for (auto& p : fs::directory_iterator(path))
{
// Check if a device's name is "p8-occ-hwmon"
auto f = p / "name";
auto str = getFileContent(f);
if (str == I2C_OCC_DEVICE_NAME)
{
if (isMasterOcc(p))
{
// Insert master occ at the beginning
result.emplace(result.begin(), p.path().filename());
}
else
{
result.emplace_back(p.path().filename());
}
}
}
}
if (!result.empty())
{
// Sort the occ devices except for master
std::sort(result.begin() + 1, result.end());
}
return result;
}
void i2cToDbus(std::string& path)
{
std::replace(path.begin(), path.end(), '-', '_');
}
void dbusToI2c(std::string& path)
{
std::replace(path.begin(), path.end(), '_', '-');
}
std::string getI2cDeviceName(const std::string& dbusPath)
{
auto name = fs::path(dbusPath).filename().string();
// Need to make sure the name starts with "occ"
assert(name.compare(0, OCC_NAME_LENGTH, OCC_NAME) == 0);
// Change name like occ_3_0050 to 3_0050
name.erase(0, OCC_NAME_LENGTH + 1);
dbusToI2c(name);
return name;
}
} // namespace i2c_occ
#endif
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