Matt Spinler | 015e3ad | 2017-08-01 11:20:47 -0500 | [diff] [blame^] | 1 | /** |
| 2 | * Copyright © 2017 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 | #include <experimental/filesystem> |
| 17 | #include <fstream> |
| 18 | #include <phosphor-logging/elog.hpp> |
| 19 | #include <phosphor-logging/elog-errors.hpp> |
| 20 | #include <xyz/openbmc_project/Common/error.hpp> |
| 21 | #include <xyz/openbmc_project/Control/Device/error.hpp> |
| 22 | #include <xyz/openbmc_project/Sensor/Device/error.hpp> |
| 23 | #include "pmbus.hpp" |
| 24 | |
| 25 | namespace witherspoon |
| 26 | { |
| 27 | namespace pmbus |
| 28 | { |
| 29 | |
| 30 | using namespace phosphor::logging; |
| 31 | using namespace sdbusplus::xyz::openbmc_project::Common::Error; |
| 32 | using namespace sdbusplus::xyz::openbmc_project::Control::Device::Error; |
| 33 | using namespace sdbusplus::xyz::openbmc_project::Sensor::Device::Error; |
| 34 | namespace fs = std::experimental::filesystem; |
| 35 | |
| 36 | std::string PMBus::insertPageNum(const std::string& templateName, |
| 37 | size_t page) |
| 38 | { |
| 39 | auto name = templateName; |
| 40 | |
| 41 | //insert the page where the P was |
| 42 | auto pos = name.find('P'); |
| 43 | if (pos != std::string::npos) |
| 44 | { |
| 45 | name.replace(pos, 1, std::to_string(page)); |
| 46 | } |
| 47 | |
| 48 | return name; |
| 49 | } |
| 50 | |
| 51 | bool PMBus::readBitInPage(const std::string& name, size_t page) |
| 52 | { |
| 53 | auto pagedBit = insertPageNum(name, page); |
| 54 | return readBit(pagedBit); |
| 55 | } |
| 56 | |
| 57 | bool PMBus::readBit(const std::string& name) |
| 58 | { |
| 59 | unsigned long int value = 0; |
| 60 | std::ifstream file; |
| 61 | fs::path path{basePath}; |
| 62 | |
| 63 | path /= name; |
| 64 | |
| 65 | file.exceptions(std::ifstream::failbit | |
| 66 | std::ifstream::badbit | |
| 67 | std::ifstream::eofbit); |
| 68 | |
| 69 | try |
| 70 | { |
| 71 | char* err = NULL; |
| 72 | std::string val{1, '\0'}; |
| 73 | |
| 74 | file.open(path); |
| 75 | file.read(&val[0], 1); |
| 76 | |
| 77 | value = strtoul(val.c_str(), &err, 10); |
| 78 | |
| 79 | if (*err) |
| 80 | { |
| 81 | log<level::ERR>("Invalid character in sysfs file", |
| 82 | entry("FILE=%s", path.c_str()), |
| 83 | entry("CONTENTS=%s", val.c_str())); |
| 84 | |
| 85 | //Catch below and handle as a read failure |
| 86 | elog<InternalFailure>(); |
| 87 | } |
| 88 | } |
| 89 | catch (std::exception& e) |
| 90 | { |
| 91 | auto rc = errno; |
| 92 | |
| 93 | log<level::ERR>("Failed to read sysfs file", |
| 94 | entry("FILENAME=%s", path.c_str())); |
| 95 | |
| 96 | elog<ReadFailure>(xyz::openbmc_project::Sensor::Device:: |
| 97 | ReadFailure::CALLOUT_ERRNO(rc), |
| 98 | xyz::openbmc_project::Sensor::Device:: |
| 99 | ReadFailure::CALLOUT_DEVICE_PATH( |
| 100 | fs::canonical(basePath).c_str())); |
| 101 | } |
| 102 | |
| 103 | return value != 0; |
| 104 | } |
| 105 | |
| 106 | void PMBus::write(const std::string& name, int value) |
| 107 | { |
| 108 | std::ofstream file; |
| 109 | fs::path path{basePath}; |
| 110 | |
| 111 | path /= name; |
| 112 | |
| 113 | file.exceptions(std::ofstream::failbit | |
| 114 | std::ofstream::badbit | |
| 115 | std::ofstream::eofbit); |
| 116 | |
| 117 | try |
| 118 | { |
| 119 | file.open(path); |
| 120 | file << value; |
| 121 | } |
| 122 | catch (const std::exception& e) |
| 123 | { |
| 124 | auto rc = errno; |
| 125 | |
| 126 | log<level::ERR>("Failed to write sysfs file", |
| 127 | entry("FILENAME=%s", path.c_str())); |
| 128 | |
| 129 | elog<WriteFailure>(xyz::openbmc_project::Control::Device:: |
| 130 | WriteFailure::CALLOUT_ERRNO(rc), |
| 131 | xyz::openbmc_project::Control::Device:: |
| 132 | WriteFailure::CALLOUT_DEVICE_PATH( |
| 133 | fs::canonical(basePath).c_str())); |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | } |
| 138 | } |