OpenHardwareMonitor: Hardware/LPC/IT87XX.cs@9ffcd8ed8537

     1 /*

     3   This Source Code Form is subject to the terms of the Mozilla Public

     4   License, v. 2.0. If a copy of the MPL was not distributed with this

     5   file, You can obtain one at http://mozilla.org/MPL/2.0/.

     7   Copyright (C) 2009-2012 Michael Möller <mmoeller@openhardwaremonitor.org>

     9 */

    11 using System.Globalization;

    12 using System.Text;

    13 using System;

    15 namespace OpenHardwareMonitor.Hardware.LPC {

    16   internal class IT87XX : ISuperIO {

    18     private readonly ushort address;

    19     private readonly Chip chip;

    20     private readonly byte version;

    22     private readonly ushort gpioAddress;

    23     private readonly int gpioCount;

    25     private readonly ushort addressReg;

    26     private readonly ushort dataReg;

    28     private readonly float?[] voltages = new float?[0];

    29     private readonly float?[] temperatures = new float?[0];

    30     private readonly float?[] fans = new float?[0];

    31     private readonly float?[] controls = new float?[0];

    33     private readonly float voltageGain;

    34     private readonly bool has16bitFanCounter;

    36     // Consts

    37     private const byte ITE_VENDOR_ID = 0x90;

    39     // Environment Controller

    40     private const byte ADDRESS_REGISTER_OFFSET = 0x05;

    41     private const byte DATA_REGISTER_OFFSET = 0x06;

    43     // Environment Controller Registers

    44     private const byte CONFIGURATION_REGISTER = 0x00;

    45     private const byte TEMPERATURE_BASE_REG = 0x29;

    46     private const byte VENDOR_ID_REGISTER = 0x58;

    47     private const byte FAN_TACHOMETER_DIVISOR_REGISTER = 0x0B;

    48     private readonly byte[] FAN_TACHOMETER_REG =

    49       { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };

    50     private readonly byte[] FAN_TACHOMETER_EXT_REG =

    51       { 0x18, 0x19, 0x1a, 0x81, 0x83 };

    52     private const byte VOLTAGE_BASE_REG = 0x20;

    53     private readonly byte[] FAN_PWM_CTRL_REG = { 0x15, 0x16, 0x17 };

    55     private bool[] restoreDefaultFanPwmControlRequired = new bool[3];

    56     private byte[] initialFanPwmControl = new byte[3];

    58     private byte ReadByte(byte register, out bool valid) {

    59       Ring0.WriteIoPort(addressReg, register);

    60       byte value = Ring0.ReadIoPort(dataReg);

    61       valid = register == Ring0.ReadIoPort(addressReg);

    62       return value;

    63     }

    65     private bool WriteByte(byte register, byte value) {

    66       Ring0.WriteIoPort(addressReg, register);

    67       Ring0.WriteIoPort(dataReg, value);

    68       return register == Ring0.ReadIoPort(addressReg);

    69     }

    71     public byte? ReadGPIO(int index) {

    72       if (index >= gpioCount)

    73         return null;

    75       return Ring0.ReadIoPort((ushort)(gpioAddress + index));

    76     }

    78     public void WriteGPIO(int index, byte value) {

    79       if (index >= gpioCount)

    80         return;

    82       Ring0.WriteIoPort((ushort)(gpioAddress + index), value);

    83     }

    85     private void SaveDefaultFanPwmControl(int index) {

    86       bool valid;

    87       if (!restoreDefaultFanPwmControlRequired[index]) {

    88         initialFanPwmControl[index] =

    89           ReadByte(FAN_PWM_CTRL_REG[index], out valid);

    90         restoreDefaultFanPwmControlRequired[index] = true;

    91       }

    92     }

    94     private void RestoreDefaultFanPwmControl(int index) {

    95       if (restoreDefaultFanPwmControlRequired[index]) {

    96         WriteByte(FAN_PWM_CTRL_REG[index], initialFanPwmControl[index]);

    97         restoreDefaultFanPwmControlRequired[index] = false;

    98       }

    99     }

   101     public void SetControl(int index, byte? value) {

   102       if (index < 0 || index >= controls.Length)

   103         throw new ArgumentOutOfRangeException("index");

   105       if (!Ring0.WaitIsaBusMutex(10))

   106         return;

   108       if (value.HasValue) {

   109         SaveDefaultFanPwmControl(index);

   111         // set output value

   112         WriteByte(FAN_PWM_CTRL_REG[index], (byte)(value.Value >> 1));

   113       } else {

   114         RestoreDefaultFanPwmControl(index);

   115       }

   117       Ring0.ReleaseIsaBusMutex();

   118     }

   120     public IT87XX(Chip chip, ushort address, ushort gpioAddress, byte version) {

   122       this.address = address;

   123       this.chip = chip;

   124       this.version = version;

   125       this.addressReg = (ushort)(address + ADDRESS_REGISTER_OFFSET);

   126       this.dataReg = (ushort)(address + DATA_REGISTER_OFFSET);

   127       this.gpioAddress = gpioAddress;

   129       // Check vendor id

   130       bool valid;

   131       byte vendorId = ReadByte(VENDOR_ID_REGISTER, out valid);

   132       if (!valid || vendorId != ITE_VENDOR_ID)

   133         return;

   135       // Bit 0x10 of the configuration register should always be 1

   136       if ((ReadByte(CONFIGURATION_REGISTER, out valid) & 0x10) == 0)

   137         return;

   138       if (!valid)

   139         return;

   141       voltages = new float?[9];

   142       temperatures = new float?[3];

   143       fans = new float?[chip == Chip.IT8705F ? 3 : 5];

   144       controls = new float?[3];

   146       // IT8721F, IT8728F and IT8772E use a 12mV resultion ADC, all others 16mV

   147       if (chip == Chip.IT8721F || chip == Chip.IT8728F || chip == Chip.IT8771E

   148         || chip == Chip.IT8772E)

   149       {

   150         voltageGain = 0.012f;

   151       } else {

   152         voltageGain = 0.016f;

   153       }

   155       // older IT8705F and IT8721F revisions do not have 16-bit fan counters

   156       if ((chip == Chip.IT8705F && version < 3) ||

   157           (chip == Chip.IT8712F && version < 8))

   158       {

   159         has16bitFanCounter = false;

   160       } else {

   161         has16bitFanCounter = true;

   162       }

   164       // Set the number of GPIO sets

   165       switch (chip) {

   166         case Chip.IT8712F:

   167         case Chip.IT8716F:

   168         case Chip.IT8718F:

   169         case Chip.IT8726F:

   170           gpioCount = 5;

   171           break;

   172         case Chip.IT8720F:

   173         case Chip.IT8721F:

   174           gpioCount = 8;

   175           break;

   176         case Chip.IT8705F:

   177         case Chip.IT8728F:

   178         case Chip.IT8771E:

   179         case Chip.IT8772E:

   180           gpioCount = 0;

   181           break;

   182       }

   183     }

   185     public Chip Chip { get { return chip; } }

   186     public float?[] Voltages { get { return voltages; } }

   187     public float?[] Temperatures { get { return temperatures; } }

   188     public float?[] Fans { get { return fans; } }

   189     public float?[] Controls { get { return controls; } }

   191     public string GetReport() {

   192       StringBuilder r = new StringBuilder();

   194       r.AppendLine("LPC " + this.GetType().Name);

   195       r.AppendLine();

   196       r.Append("Chip ID: 0x"); r.AppendLine(chip.ToString("X"));

   197       r.Append("Chip Version: 0x"); r.AppendLine(

   198         version.ToString("X", CultureInfo.InvariantCulture));

   199       r.Append("Base Address: 0x"); r.AppendLine(

   200         address.ToString("X4", CultureInfo.InvariantCulture));

   201       r.Append("GPIO Address: 0x"); r.AppendLine(

   202         gpioAddress.ToString("X4", CultureInfo.InvariantCulture));

   203       r.AppendLine();

   205       if (!Ring0.WaitIsaBusMutex(100))

   206         return r.ToString();

   208       r.AppendLine("Environment Controller Registers");

   209       r.AppendLine();

   210       r.AppendLine("      00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F");

   211       r.AppendLine();

   212       for (int i = 0; i <= 0xA; i++) {

   213         r.Append(" ");

   214         r.Append((i << 4).ToString("X2", CultureInfo.InvariantCulture));

   215         r.Append("  ");

   216         for (int j = 0; j <= 0xF; j++) {

   217           r.Append(" ");

   218           bool valid;

   219           byte value = ReadByte((byte)((i << 4) | j), out valid);

   220           r.Append(

   221             valid ? value.ToString("X2", CultureInfo.InvariantCulture) : "??");

   222         }

   223         r.AppendLine();

   224       }

   225       r.AppendLine();

   227       r.AppendLine("GPIO Registers");

   228       r.AppendLine();

   229       for (int i = 0; i < gpioCount; i++) {

   230         r.Append(" ");

   231         r.Append(ReadGPIO(i).Value.ToString("X2",

   232           CultureInfo.InvariantCulture));

   233       }

   234       r.AppendLine();

   235       r.AppendLine();

   237       Ring0.ReleaseIsaBusMutex();

   239       return r.ToString();

   240     }

   242     public void Update() {

   243       if (!Ring0.WaitIsaBusMutex(10))

   244         return;

   246       for (int i = 0; i < voltages.Length; i++) {

   247         bool valid;

   249         float value =

   250           voltageGain * ReadByte((byte)(VOLTAGE_BASE_REG + i), out valid);

   252         if (!valid)

   253           continue;

   254         if (value > 0)

   255           voltages[i] = value;

   256         else

   257           voltages[i] = null;

   258       }

   260       for (int i = 0; i < temperatures.Length; i++) {

   261         bool valid;

   262         sbyte value = (sbyte)ReadByte(

   263           (byte)(TEMPERATURE_BASE_REG + i), out valid);

   264         if (!valid)

   265           continue;

   267         if (value < sbyte.MaxValue && value > 0)

   268           temperatures[i] = value;

   269         else

   270           temperatures[i] = null;

   271       }

   273       if (has16bitFanCounter) {

   274         for (int i = 0; i < fans.Length; i++) {

   275           bool valid;

   276           int value = ReadByte(FAN_TACHOMETER_REG[i], out valid);

   277           if (!valid)

   278             continue;

   279           value |= ReadByte(FAN_TACHOMETER_EXT_REG[i], out valid) << 8;

   280           if (!valid)

   281             continue;

   283           if (value > 0x3f) {

   284             fans[i] = (value < 0xffff) ? 1.35e6f / (value * 2) : 0;

   285           } else {

   286             fans[i] = null;

   287           }

   288         }

   289       } else {

   290         for (int i = 0; i < fans.Length; i++) {

   291           bool valid;

   292           int value = ReadByte(FAN_TACHOMETER_REG[i], out valid);

   293           if (!valid)

   294             continue;

   296           int divisor = 2;

   297           if (i < 2) {

   298             int divisors = ReadByte(FAN_TACHOMETER_DIVISOR_REGISTER, out valid);

   299             if (!valid)

   300               continue;

   301             divisor = 1 << ((divisors >> (3 * i)) & 0x7);

   302           }

   304           if (value > 0) {

   305             fans[i] = (value < 0xff) ? 1.35e6f / (value * divisor) : 0;

   306           } else {

   307             fans[i] = null;

   308           }

   309         }

   310       }

   312       for (int i = 0; i < controls.Length; i++) {

   313         bool valid;

   314         byte value = ReadByte(FAN_PWM_CTRL_REG[i], out valid);

   315         if (!valid)

   316           continue;

   318         if ((value & 0x80) > 0) {

   319           // automatic operation (value can't be read)

   320           controls[i] = null;

   321         } else {

   322           // software operation

   323           controls[i] = (float)Math.Round((value & 0x7F) * 100.0f / 0x7F);

   324         }

   325       }

   327       Ring0.ReleaseIsaBusMutex();

   328     }

   329   }

   330 }

author	StephaneLenclud
	Mon, 04 Feb 2013 00:47:01 +0100
branch	MiniDisplay
changeset 435	9ffcd8ed8537
parent 353	b4e37f5b2669
permissions	-rw-r--r--