OpenHardwareMonitor: Hardware/LPC/IT87XX.cs@0899f651d5cf

     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;

    14 namespace OpenHardwareMonitor.Hardware.LPC {

    15   internal class IT87XX : ISuperIO {

    17     private readonly ushort address;

    18     private readonly Chip chip;

    19     private readonly byte version;

    21     private readonly ushort gpioAddress;

    22     private readonly int gpioCount;

    24     private readonly ushort addressReg;

    25     private readonly ushort dataReg;

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

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

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

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

    32     private readonly float voltageGain;

    33     private readonly bool has16bitFanCounter;

    35     // Consts

    36     private const byte ITE_VENDOR_ID = 0x90;

    38     // Environment Controller

    39     private const byte ADDRESS_REGISTER_OFFSET = 0x05;

    40     private const byte DATA_REGISTER_OFFSET = 0x06;

    42     // Environment Controller Registers

    43     private const byte CONFIGURATION_REGISTER = 0x00;

    44     private const byte TEMPERATURE_BASE_REG = 0x29;

    45     private const byte VENDOR_ID_REGISTER = 0x58;

    46     private const byte FAN_TACHOMETER_DIVISOR_REGISTER = 0x0B;

    47     private readonly byte[] FAN_TACHOMETER_REG =

    48       new byte[] { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };

    49     private readonly byte[] FAN_TACHOMETER_EXT_REG =

    50       new byte[] { 0x18, 0x19, 0x1a, 0x81, 0x83 };

    51     private const byte VOLTAGE_BASE_REG = 0x20;

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

    54       Ring0.WriteIoPort(addressReg, register);

    55       byte value = Ring0.ReadIoPort(dataReg);

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

    57       return value;

    58     }

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

    61       Ring0.WriteIoPort(addressReg, register);

    62       Ring0.WriteIoPort(dataReg, value);

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

    64     }

    66     public byte? ReadGPIO(int index) {

    67       if (index >= gpioCount)

    68         return null;

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

    71     }

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

    74       if (index >= gpioCount)

    75         return;

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

    78     }

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

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

    84       this.address = address;

    85       this.chip = chip;

    86       this.version = version;

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

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

    89       this.gpioAddress = gpioAddress;

    91       // Check vendor id

    92       bool valid;

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

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

    95         return;

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

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

    99         return;

   100       if (!valid)

   101         return;

   103       voltages = new float?[9];

   104       temperatures = new float?[3];

   105       fans = new float?[5];

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

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

   109         || chip == Chip.IT8772E)

   110       {

   111         voltageGain = 0.012f;

   112       } else {

   113         voltageGain = 0.016f;

   114       }

   116       // older IT8721F revision do not have 16-bit fan counters

   117       if (chip == Chip.IT8712F && version < 8) {

   118         has16bitFanCounter = false;

   119       } else {

   120         has16bitFanCounter = true;

   121       }

   123       // Set the number of GPIO sets

   124       switch (chip) {

   125         case Chip.IT8712F:

   126         case Chip.IT8716F:

   127         case Chip.IT8718F:

   128         case Chip.IT8726F:

   129           gpioCount = 5;

   130           break;

   131         case Chip.IT8720F:

   132         case Chip.IT8721F:

   133           gpioCount = 8;

   134           break;

   135         case Chip.IT8728F:

   136         case Chip.IT8771E:

   137         case Chip.IT8772E:

   138           gpioCount = 0;

   139           break;

   140       }

   141     }

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

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

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

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

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

   149     public string GetReport() {

   150       StringBuilder r = new StringBuilder();

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

   153       r.AppendLine();

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

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

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

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

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

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

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

   161       r.AppendLine();

   163       if (!Ring0.WaitIsaBusMutex(100))

   164         return r.ToString();

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

   167       r.AppendLine();

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

   169       r.AppendLine();

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

   171         r.Append(" ");

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

   173         r.Append("  ");

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

   175           r.Append(" ");

   176           bool valid;

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

   178           r.Append(

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

   180         }

   181         r.AppendLine();

   182       }

   183       r.AppendLine();

   185       r.AppendLine("GPIO Registers");

   186       r.AppendLine();

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

   188         r.Append(" ");

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

   190           CultureInfo.InvariantCulture));

   191       }

   192       r.AppendLine();

   193       r.AppendLine();

   195       Ring0.ReleaseIsaBusMutex();

   197       return r.ToString();

   198     }

   200     public void Update() {

   201       if (!Ring0.WaitIsaBusMutex(10))

   202         return;

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

   205         bool valid;

   207         float value =

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

   210         if (!valid)

   211           continue;

   212         if (value > 0)

   213           voltages[i] = value;

   214         else

   215           voltages[i] = null;

   216       }

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

   219         bool valid;

   220         sbyte value = (sbyte)ReadByte(

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

   222         if (!valid)

   223           continue;

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

   226           temperatures[i] = value;

   227         else

   228           temperatures[i] = null;

   229       }

   231       if (has16bitFanCounter) {

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

   233           bool valid;

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

   235           if (!valid)

   236             continue;

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

   238           if (!valid)

   239             continue;

   241           if (value > 0x3f) {

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

   243           } else {

   244             fans[i] = null;

   245           }

   246         }

   247       } else {

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

   249           bool valid;

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

   251           if (!valid)

   252             continue;

   254           int divisor = 2;

   255           if (i < 2) {

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

   257             if (!valid)

   258               continue;

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

   260           }

   262           if (value > 0) {

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

   264           } else {

   265             fans[i] = null;

   266           }

   267         }

   268       }

   270       Ring0.ReleaseIsaBusMutex();

   271     }

   272   }

   273 }

author	moel.mich
	Fri, 22 Jun 2012 10:05:23 +0000
changeset 352	0899f651d5cf
parent 341	5172a92c5c20
child 353	b4e37f5b2669
permissions	-rw-r--r--