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Apple Silicon Support
2021-02-14 22:01:54 +01:00
//
// SMC.swift
// SMCKit
//
// The MIT License
//
// Copyright (C) 2014-2017 beltex <https://beltex.github.io>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
import IOKit
import Foundation
import os
//------------------------------------------------------------------------------
// MARK: Type Aliases
//------------------------------------------------------------------------------
// http://stackoverflow.com/a/22383661
/// Floating point, unsigned, 14 bits exponent, 2 bits fraction
public typealias FPE2 = (UInt8, UInt8)
/// Floating point, signed, 7 bits exponent, 8 bits fraction
public typealias SP78 = (UInt8, UInt8)
public typealias SMCBytes = (UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8,
UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8,
UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8,
UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8,
UInt8, UInt8, UInt8, UInt8)
//------------------------------------------------------------------------------
// MARK: Standard Library Extensions
//------------------------------------------------------------------------------
extension UInt32 {
init(fromBytes bytes: (UInt8, UInt8, UInt8, UInt8)) {
// TODO: Broken up due to "Expression was too complex" error as of
// Swift 4.
let byte0 = UInt32(bytes.0) << 24
let byte1 = UInt32(bytes.1) << 16
let byte2 = UInt32(bytes.2) << 8
let byte3 = UInt32(bytes.3)
self = byte0 | byte1 | byte2 | byte3
}
}
extension Bool {
init(fromByte byte: UInt8) {
self = byte == 1 ? true : false
}
}
public extension Int {
init(fromFPE2 bytes: FPE2) {
self = (Int(bytes.0) << 6) + (Int(bytes.1) >> 2)
}
func toFPE2() -> FPE2 {
return (UInt8(self >> 6), UInt8((self << 2) ^ ((self >> 6) << 8)))
}
}
extension Double {
init(fromSP78 bytes: SP78) {
// FIXME: Handle second byte
let sign = bytes.0 & 0x80 == 0 ? 1.0 : -1.0
self = sign * Double(bytes.0 & 0x7F) // AND to mask sign bit
}
}
// Thanks to Airspeed Velocity for the great idea!
// http://airspeedvelocity.net/2015/05/22/my-talk-at-swift-summit/
public extension FourCharCode {
init(fromString str: String) {
precondition(str.count == 4)
self = str.utf8.reduce(0) { sum, character in
return sum << 8 | UInt32(character)
}
}
init(fromStaticString str: StaticString) {
precondition(str.utf8CodeUnitCount == 4)
self = str.withUTF8Buffer { buffer in
// TODO: Broken up due to "Expression was too complex" error as of
// Swift 4.
let byte0 = UInt32(buffer[0]) << 24
let byte1 = UInt32(buffer[1]) << 16
let byte2 = UInt32(buffer[2]) << 8
let byte3 = UInt32(buffer[3])
return byte0 | byte1 | byte2 | byte3
}
}
func toString() -> String {
return String(describing: UnicodeScalar(self >> 24 & 0xff)!) +
String(describing: UnicodeScalar(self >> 16 & 0xff)!) +
String(describing: UnicodeScalar(self >> 8 & 0xff)!) +
String(describing: UnicodeScalar(self & 0xff)!)
}
}
//------------------------------------------------------------------------------
// MARK: Defined by AppleSMC.kext
//------------------------------------------------------------------------------
/// Defined by AppleSMC.kext
///
/// This is the predefined struct that must be passed to communicate with the
/// AppleSMC driver. While the driver is closed source, the definition of this
/// struct happened to appear in the Apple PowerManagement project at around
/// version 211, and soon after disappeared. It can be seen in the PrivateLib.c
/// file under pmconfigd. Given that it is C code, this is the closest
/// translation to Swift from a type perspective.
///
/// ### Issues
///
/// * Padding for struct alignment when passed over to C side
/// * Size of struct must be 80 bytes
/// * C array's are bridged as tuples
///
/// http://www.opensource.apple.com/source/PowerManagement/PowerManagement-211/
public struct SMCParamStruct {
/// I/O Kit function selector
public enum Selector: UInt8 {
case kSMCHandleYPCEvent = 2
case kSMCReadKey = 5
case kSMCWriteKey = 6
case kSMCGetKeyFromIndex = 8
case kSMCGetKeyInfo = 9
}
/// Return codes for SMCParamStruct.result property
public enum Result: UInt8 {
case kSMCSuccess = 0
case kSMCError = 1
case kSMCKeyNotFound = 132
}
public struct SMCVersion {
var major: CUnsignedChar = 0
var minor: CUnsignedChar = 0
var build: CUnsignedChar = 0
var reserved: CUnsignedChar = 0
var release: CUnsignedShort = 0
}
public struct SMCPLimitData {
var version: UInt16 = 0
var length: UInt16 = 0
var cpuPLimit: UInt32 = 0
var gpuPLimit: UInt32 = 0
var memPLimit: UInt32 = 0
}
public struct SMCKeyInfoData {
/// How many bytes written to SMCParamStruct.bytes
//var dataSize: IOByteCount = 0
var dataSize:UInt32 = 0
/// Type of data written to SMCParamStruct.bytes. This lets us know how
/// to interpret it (translate it to human readable)
var dataType: UInt32 = 0
var dataAttributes: UInt8 = 0
}
/// FourCharCode telling the SMC what we want
var key: UInt32 = 0
var vers = SMCVersion()
var pLimitData = SMCPLimitData()
var keyInfo = SMCKeyInfoData()
/// Padding for struct alignment when passed over to C side
var padding: UInt16 = 0
/// Result of an operation
var result: UInt8 = 0
var status: UInt8 = 0
/// Method selector
var data8: UInt8 = 0
var data32: UInt32 = 0
/// Data returned from the SMC
var bytes: SMCBytes = (UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0),
UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0),
UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0),
UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0),
UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0),
UInt8(0), UInt8(0))
}
//------------------------------------------------------------------------------
// MARK: SMC Client
//------------------------------------------------------------------------------
/// SMC data type information
public struct DataTypes {
/// Fan information struct
public static let FDS =
DataType(type: FourCharCode(fromStaticString: "{fds"), size: 16)
public static let Flag =
DataType(type: FourCharCode(fromStaticString: "flag"), size: 1)
/// See type aliases
public static let FPE2 =
DataType(type: FourCharCode(fromStaticString: "fpe2"), size: 2)
/// See type aliases
public static let SP78 =
DataType(type: FourCharCode(fromStaticString: "sp78"), size: 2)
public static let UInt8 =
DataType(type: FourCharCode(fromStaticString: "ui8 "), size: 1)
public static let UInt32 =
DataType(type: FourCharCode(fromStaticString: "ui32"), size: 4)
}
public struct SMCKey {
let code: FourCharCode
let info: DataType
}
public struct DataType: Equatable {
let type: FourCharCode
let size: IOByteCount
}
public func ==(lhs: DataType, rhs: DataType) -> Bool {
return lhs.type == rhs.type && lhs.size == rhs.size
}
/// Apple System Management Controller (SMC) user-space client for Intel-based
/// Macs. Works by talking to the AppleSMC.kext (kernel extension), the closed
/// source driver for the SMC.
public struct SMCKit {
public enum SMCError: Error {
/// AppleSMC driver not found
case driverNotFound
/// Failed to open a connection to the AppleSMC driver
case failedToOpen
/// This SMC key is not valid on this machine
case keyNotFound(code: String)
/// Requires root privileges
case notPrivileged
/// Fan speed must be > 0 && <= fanMaxSpeed
case unsafeFanSpeed
/// https://developer.apple.com/library/mac/qa/qa1075/_index.html
///
/// - parameter kIOReturn: I/O Kit error code
/// - parameter SMCResult: SMC specific return code
case unknown(kIOReturn: kern_return_t, SMCResult: UInt8)
}
/// Connection to the SMC driver
fileprivate static var connection: io_connect_t = 0
/// Open connection to the SMC driver. This must be done first before any
/// other calls
public static func open() throws {
let service = IOServiceGetMatchingService(kIOMasterPortDefault,
IOServiceMatching("AppleSMC"))
if service == 0 { throw SMCError.driverNotFound }
let result = IOServiceOpen(service, mach_task_self_, 0,
&SMCKit.connection)
IOObjectRelease(service)
if result != kIOReturnSuccess { throw SMCError.failedToOpen }
}
/// Close connection to the SMC driver
@discardableResult
public static func close() -> Bool {
let result = IOServiceClose(SMCKit.connection)
return result == kIOReturnSuccess ? true : false
}
/// Get information about a key
public static func keyInformation(_ key: FourCharCode) throws -> DataType {
var inputStruct = SMCParamStruct()
inputStruct.key = key
inputStruct.data8 = SMCParamStruct.Selector.kSMCGetKeyInfo.rawValue
let outputStruct = try callDriver(&inputStruct)
return DataType(type: outputStruct.keyInfo.dataType,
size: IOByteCount(outputStruct.keyInfo.dataSize))
}
/// Get information about the key at index
public static func keyInformationAtIndex(_ index: Int) throws ->
FourCharCode {
var inputStruct = SMCParamStruct()
inputStruct.data8 = SMCParamStruct.Selector.kSMCGetKeyFromIndex.rawValue
inputStruct.data32 = UInt32(index)
let outputStruct = try callDriver(&inputStruct)
return outputStruct.key
}
public static func getKey(_ code: String, type: DataType) -> SMCKey {
let key = SMCKey(code: FourCharCode(fromString: code), info: type)
return key
}
/// Read data of a key
public static func readData(_ key: SMCKey) throws -> SMCBytes {
var inputStruct = SMCParamStruct()
inputStruct.key = key.code
inputStruct.keyInfo.dataSize = UInt32(IOByteCount(key.info.size))
inputStruct.data8 = SMCParamStruct.Selector.kSMCReadKey.rawValue
let outputStruct = try callDriver(&inputStruct)
return outputStruct.bytes
}
/// Write data for a key
public static func writeData(_ key: SMCKey, data: SMCBytes) throws {
var inputStruct = SMCParamStruct()
inputStruct.key = key.code
inputStruct.bytes = data
inputStruct.keyInfo.dataSize = UInt32(IOByteCount(key.info.size))
inputStruct.data8 = SMCParamStruct.Selector.kSMCWriteKey.rawValue
_ = try callDriver(&inputStruct)
}
/// Make an actual call to the SMC driver
public static func callDriver(_ inputStruct: inout SMCParamStruct,
selector: SMCParamStruct.Selector = .kSMCHandleYPCEvent)
throws -> SMCParamStruct {
os_log("SMCPARAMSTRUCT SIZE: %d", MemoryLayout<SMCParamStruct>.stride)
assert(MemoryLayout<SMCParamStruct>.stride == 80, "SMCParamStruct size is != 80")
var outputStruct = SMCParamStruct()
let inputStructSize = MemoryLayout<SMCParamStruct>.stride
var outputStructSize = MemoryLayout<SMCParamStruct>.stride
let result = IOConnectCallStructMethod(SMCKit.connection,
UInt32(selector.rawValue),
&inputStruct,
inputStructSize,
&outputStruct,
&outputStructSize)
switch (result, outputStruct.result) {
case (kIOReturnSuccess, SMCParamStruct.Result.kSMCSuccess.rawValue):
return outputStruct
case (kIOReturnSuccess, SMCParamStruct.Result.kSMCKeyNotFound.rawValue):
throw SMCError.keyNotFound(code: inputStruct.key.toString())
case (kIOReturnNotPrivileged, _):
throw SMCError.notPrivileged
default:
throw SMCError.unknown(kIOReturn: result,
SMCResult: outputStruct.result)
}
}
}
//------------------------------------------------------------------------------
// MARK: General
//------------------------------------------------------------------------------
extension SMCKit {
/// Get all valid SMC keys for this machine
public static func allKeys() throws -> [SMCKey] {
let count = try keyCount()
var keys = [SMCKey]()
for i in 0 ..< count {
let key = try keyInformationAtIndex(i)
let info = try keyInformation(key)
keys.append(SMCKey(code: key, info: info))
}
return keys
}
/// Get the number of valid SMC keys for this machine
public static func keyCount() throws -> Int {
let key = SMCKey(code: FourCharCode(fromStaticString: "#KEY"),
info: DataTypes.UInt32)
let data = try readData(key)
return Int(UInt32(fromBytes: (data.0, data.1, data.2, data.3)))
}
/// Is this key valid on this machine?
public static func isKeyFound(_ code: FourCharCode) throws -> Bool {
do {
_ = try keyInformation(code)
} catch SMCError.keyNotFound { return false }
return true
}
}
//------------------------------------------------------------------------------
// MARK: Temperature
//------------------------------------------------------------------------------
/// The list is NOT exhaustive. In addition, the names of the sensors may not be
/// mapped to the correct hardware component.
///
/// ### Sources
///
/// * powermetrics(1)
/// * https://www.apple.com/downloads/dashboard/status/istatpro.html
/// * https://github.com/hholtmann/smcFanControl
/// * https://github.com/jedda/OSX-Monitoring-Tools
/// * http://www.opensource.apple.com/source/net_snmp/
/// * http://www.parhelia.ch/blog/statics/k3_keys.html
public struct TemperatureSensors {
public static let AMBIENT_AIR_0 = TemperatureSensor(name: "AMBIENT_AIR_0",
code: FourCharCode(fromStaticString: "TA0P"))
public static let AMBIENT_AIR_1 = TemperatureSensor(name: "AMBIENT_AIR_1",
code: FourCharCode(fromStaticString: "TA1P"))
// Via powermetrics(1)
public static let CPU_0_DIE = TemperatureSensor(name: "CPU_0_DIE",
code: FourCharCode(fromStaticString: "TC0F"))
public static let CPU_0_DIODE = TemperatureSensor(name: "CPU_0_DIODE",
code: FourCharCode(fromStaticString: "TC0D"))
public static let CPU_0_HEATSINK = TemperatureSensor(name: "CPU_0_HEATSINK",
code: FourCharCode(fromStaticString: "TC0H"))
public static let CPU_0_PROXIMITY =
TemperatureSensor(name: "CPU_0_PROXIMITY",
code: FourCharCode(fromStaticString: "TC0P"))
public static let ENCLOSURE_BASE_0 =
TemperatureSensor(name: "ENCLOSURE_BASE_0",
code: FourCharCode(fromStaticString: "TB0T"))
public static let ENCLOSURE_BASE_1 =
TemperatureSensor(name: "ENCLOSURE_BASE_1",
code: FourCharCode(fromStaticString: "TB1T"))
public static let ENCLOSURE_BASE_2 =
TemperatureSensor(name: "ENCLOSURE_BASE_2",
code: FourCharCode(fromStaticString: "TB2T"))
public static let ENCLOSURE_BASE_3 =
TemperatureSensor(name: "ENCLOSURE_BASE_3",
code: FourCharCode(fromStaticString: "TB3T"))
public static let GPU_0_DIODE = TemperatureSensor(name: "GPU_0_DIODE",
code: FourCharCode(fromStaticString: "TG0D"))
public static let GPU_0_HEATSINK = TemperatureSensor(name: "GPU_0_HEATSINK",
code: FourCharCode(fromStaticString: "TG0H"))
public static let GPU_0_PROXIMITY =
TemperatureSensor(name: "GPU_0_PROXIMITY",
code: FourCharCode(fromStaticString: "TG0P"))
public static let HDD_PROXIMITY = TemperatureSensor(name: "HDD_PROXIMITY",
code: FourCharCode(fromStaticString: "TH0P"))
public static let HEATSINK_0 = TemperatureSensor(name: "HEATSINK_0",
code: FourCharCode(fromStaticString: "Th0H"))
public static let HEATSINK_1 = TemperatureSensor(name: "HEATSINK_1",
code: FourCharCode(fromStaticString: "Th1H"))
public static let HEATSINK_2 = TemperatureSensor(name: "HEATSINK_2",
code: FourCharCode(fromStaticString: "Th2H"))
public static let LCD_PROXIMITY = TemperatureSensor(name: "LCD_PROXIMITY",
code: FourCharCode(fromStaticString: "TL0P"))
public static let MEM_SLOT_0 = TemperatureSensor(name: "MEM_SLOT_0",
code: FourCharCode(fromStaticString: "TM0S"))
public static let MEM_SLOTS_PROXIMITY =
TemperatureSensor(name: "MEM_SLOTS_PROXIMITY",
code: FourCharCode(fromStaticString: "TM0P"))
public static let MISC_PROXIMITY = TemperatureSensor(name: "MISC_PROXIMITY",
code: FourCharCode(fromStaticString: "Tm0P"))
public static let NORTHBRIDGE = TemperatureSensor(name: "NORTHBRIDGE",
code: FourCharCode(fromStaticString: "TN0H"))
public static let NORTHBRIDGE_DIODE =
TemperatureSensor(name: "NORTHBRIDGE_DIODE",
code: FourCharCode(fromStaticString: "TN0D"))
public static let NORTHBRIDGE_PROXIMITY =
TemperatureSensor(name: "NORTHBRIDGE_PROXIMITY",
code: FourCharCode(fromStaticString: "TN0P"))
public static let ODD_PROXIMITY = TemperatureSensor(name: "ODD_PROXIMITY",
code: FourCharCode(fromStaticString: "TO0P"))
public static let PALM_REST = TemperatureSensor(name: "PALM_REST",
code: FourCharCode(fromStaticString: "Ts0P"))
public static let PWR_SUPPLY_PROXIMITY =
TemperatureSensor(name: "PWR_SUPPLY_PROXIMITY",
code: FourCharCode(fromStaticString: "Tp0P"))
public static let THUNDERBOLT_0 = TemperatureSensor(name: "THUNDERBOLT_0",
code: FourCharCode(fromStaticString: "TI0P"))
public static let THUNDERBOLT_1 = TemperatureSensor(name: "THUNDERBOLT_1",
code: FourCharCode(fromStaticString: "TI1P"))
public static let all = [AMBIENT_AIR_0.code: AMBIENT_AIR_0,
AMBIENT_AIR_1.code: AMBIENT_AIR_1,
CPU_0_DIE.code: CPU_0_DIE,
CPU_0_DIODE.code: CPU_0_DIODE,
CPU_0_HEATSINK.code: CPU_0_HEATSINK,
CPU_0_PROXIMITY.code: CPU_0_PROXIMITY,
ENCLOSURE_BASE_0.code: ENCLOSURE_BASE_0,
ENCLOSURE_BASE_1.code: ENCLOSURE_BASE_1,
ENCLOSURE_BASE_2.code: ENCLOSURE_BASE_2,
ENCLOSURE_BASE_3.code: ENCLOSURE_BASE_3,
GPU_0_DIODE.code: GPU_0_DIODE,
GPU_0_HEATSINK.code: GPU_0_HEATSINK,
GPU_0_PROXIMITY.code: GPU_0_PROXIMITY,
HDD_PROXIMITY.code: HDD_PROXIMITY,
HEATSINK_0.code: HEATSINK_0,
HEATSINK_1.code: HEATSINK_1,
HEATSINK_2.code: HEATSINK_2,
MEM_SLOT_0.code: MEM_SLOT_0,
MEM_SLOTS_PROXIMITY.code: MEM_SLOTS_PROXIMITY,
PALM_REST.code: PALM_REST,
LCD_PROXIMITY.code: LCD_PROXIMITY,
MISC_PROXIMITY.code: MISC_PROXIMITY,
NORTHBRIDGE.code: NORTHBRIDGE,
NORTHBRIDGE_DIODE.code: NORTHBRIDGE_DIODE,
NORTHBRIDGE_PROXIMITY.code: NORTHBRIDGE_PROXIMITY,
ODD_PROXIMITY.code: ODD_PROXIMITY,
PWR_SUPPLY_PROXIMITY.code: PWR_SUPPLY_PROXIMITY,
THUNDERBOLT_0.code: THUNDERBOLT_0,
THUNDERBOLT_1.code: THUNDERBOLT_1]
}
public struct TemperatureSensor {
public let name: String
public let code: FourCharCode
}
public enum TemperatureUnit {
case celius
case fahrenheit
case kelvin
public static func toFahrenheit(_ celius: Double) -> Double {
// https://en.wikipedia.org/wiki/Fahrenheit#Definition_and_conversions
return (celius * 1.8) + 32
}
public static func toKelvin(_ celius: Double) -> Double {
// https://en.wikipedia.org/wiki/Kelvin
return celius + 273.15
}
}
extension SMCKit {
public static func allKnownTemperatureSensors() throws ->
[TemperatureSensor] {
var sensors = [TemperatureSensor]()
for sensor in TemperatureSensors.all.values {
if try isKeyFound(sensor.code) { sensors.append(sensor) }
}
return sensors
}
public static func allUnknownTemperatureSensors() throws -> [TemperatureSensor] {
let keys = try allKeys()
return keys.filter { $0.code.toString().hasPrefix("T") &&
$0.info == DataTypes.SP78 &&
TemperatureSensors.all[$0.code] == nil }
.map { TemperatureSensor(name: "Unknown", code: $0.code) }
}
/// Get current temperature of a sensor
public static func temperature(_ sensorCode: FourCharCode,
unit: TemperatureUnit = .celius) throws -> Double {
let data = try readData(SMCKey(code: sensorCode, info: DataTypes.SP78))
let temperatureInCelius = Double(fromSP78: (data.0, data.1))
switch unit {
case .celius:
return temperatureInCelius
case .fahrenheit:
return TemperatureUnit.toFahrenheit(temperatureInCelius)
case .kelvin:
return TemperatureUnit.toKelvin(temperatureInCelius)
}
}
}
//------------------------------------------------------------------------------
// MARK: Fan
//------------------------------------------------------------------------------
public struct Fan {
// TODO: Should we start the fan id from 1 instead of 0?
public let id: Int
public let name: String
public let minSpeed: Int
public let maxSpeed: Int
}
extension SMCKit {
public static func allFans() throws -> [Fan] {
let count = try fanCount()
var fans = [Fan]()
for i in 0 ..< count {
fans.append(try SMCKit.fan(i))
}
return fans
}
public static func fan(_ id: Int) throws -> Fan {
let name = try fanName(id)
let minSpeed = try fanMinSpeed(id)
let maxSpeed = try fanMaxSpeed(id)
return Fan(id: id, name: name, minSpeed: minSpeed, maxSpeed: maxSpeed)
}
/// Number of fans this machine has. All Intel based Macs, except for the
/// 2015 MacBook (8,1), have at least 1
public static func fanCount() throws -> Int {
let key = SMCKey(code: FourCharCode(fromStaticString: "FNum"),
info: DataTypes.UInt8)
let data = try readData(key)
return Int(data.0)
}
public static func fanName(_ id: Int) throws -> String {
let key = SMCKey(code: FourCharCode(fromString: "F\(id)ID"),
info: DataTypes.FDS)
let data = try readData(key)
// The last 12 bytes of '{fds' data type, a custom struct defined by the
// AppleSMC.kext that is 16 bytes, contains the fan name
let c1 = String(UnicodeScalar(data.4))
let c2 = String(UnicodeScalar(data.5))
let c3 = String(UnicodeScalar(data.6))
let c4 = String(UnicodeScalar(data.7))
let c5 = String(UnicodeScalar(data.8))
let c6 = String(UnicodeScalar(data.9))
let c7 = String(UnicodeScalar(data.10))
let c8 = String(UnicodeScalar(data.11))
let c9 = String(UnicodeScalar(data.12))
let c10 = String(UnicodeScalar(data.13))
let c11 = String(UnicodeScalar(data.14))
let c12 = String(UnicodeScalar(data.15))
let name = c1 + c2 + c3 + c4 + c5 + c6 + c7 + c8 + c9 + c10 + c11 + c12
let characterSet = CharacterSet.whitespaces
return name.trimmingCharacters(in: characterSet)
}
public static func fanCurrentSpeed(_ id: Int) throws -> Int {
let key = SMCKey(code: FourCharCode(fromString: "F\(id)Ac"),
info: DataTypes.FPE2)
let data = try readData(key)
return Int(fromFPE2: (data.0, data.1))
}
public static func fanMinSpeed(_ id: Int) throws -> Int {
let key = SMCKey(code: FourCharCode(fromString: "F\(id)Mn"),
info: DataTypes.FPE2)
let data = try readData(key)
return Int(fromFPE2: (data.0, data.1))
}
public static func fanMaxSpeed(_ id: Int) throws -> Int {
let key = SMCKey(code: FourCharCode(fromString: "F\(id)Mx"),
info: DataTypes.FPE2)
let data = try readData(key)
return Int(fromFPE2: (data.0, data.1))
}
/// Requires root privileges. By minimum we mean that OS X can interject and
/// raise the fan speed if needed, however it will not go below this.
///
/// WARNING: You are playing with hardware here, BE CAREFUL.
///
/// - Throws: Of note, `SMCKit.SMCError`'s `UnsafeFanSpeed` and `NotPrivileged`
public static func fanSetMinSpeed(_ id: Int, speed: Int) throws {
let maxSpeed = try fanMaxSpeed(id)
if speed <= 0 || speed > maxSpeed { throw SMCError.unsafeFanSpeed }
let data = speed.toFPE2()
let bytes: SMCBytes = (data.0, data.1, UInt8(0), UInt8(0), UInt8(0), UInt8(0),
UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0),
UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0),
UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0),
UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0), UInt8(0),
UInt8(0), UInt8(0))
let key = SMCKey(code: FourCharCode(fromString: "F\(id)Mn"),
info: DataTypes.FPE2)
try writeData(key, data: bytes)
}
}
//------------------------------------------------------------------------------
// MARK: Miscellaneous
//------------------------------------------------------------------------------
public struct batteryInfo {
public let batteryCount: Int
public let isACPresent: Bool
public let isBatteryPowered: Bool
public let isBatteryOk: Bool
public let isCharging: Bool
}
extension SMCKit {
public static func isOpticalDiskDriveFull() throws -> Bool {
// TODO: Should we catch key not found? That just means the machine
// doesn't have an ODD. Returning false though is not fully correct.
// Maybe we could throw a no ODD error instead?
let key = SMCKey(code: FourCharCode(fromStaticString: "MSDI"),
info: DataTypes.Flag)
let data = try readData(key)
return Bool(fromByte: data.0)
}
public static func batteryInformation() throws -> batteryInfo {
let batteryCountKey =
SMCKey(code: FourCharCode(fromStaticString: "BNum"),
info: DataTypes.UInt8)
let batteryPoweredKey =
SMCKey(code: FourCharCode(fromStaticString: "BATP"),
info: DataTypes.Flag)
let batteryInfoKey =
SMCKey(code: FourCharCode(fromStaticString: "BSIn"),
info: DataTypes.UInt8)
let batteryCountData = try readData(batteryCountKey)
let batteryCount = Int(batteryCountData.0)
let isBatteryPoweredData = try readData(batteryPoweredKey)
let isBatteryPowered = Bool(fromByte: isBatteryPoweredData.0)
let batteryInfoData = try readData(batteryInfoKey)
let isCharging = batteryInfoData.0 & 1 == 1 ? true : false
let isACPresent = (batteryInfoData.0 >> 1) & 1 == 1 ? true : false
let isBatteryOk = (batteryInfoData.0 >> 6) & 1 == 1 ? true : false
return batteryInfo(batteryCount: batteryCount, isACPresent: isACPresent,
isBatteryPowered: isBatteryPowered,
isBatteryOk: isBatteryOk,
isCharging: isCharging)
}
}