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Hardware/LPC/IT87XX.cs
author moel.mich
Sat, 23 Jun 2012 22:14:28 +0000
changeset 353 b4e37f5b2669
parent 344 3145aadca3d2
child 382 ba6abd47a80c
permissions -rw-r--r--
Added support for IT8705F super I/O chips. 
     1 /*

     2  

     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/.

     6  

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

     8 	

     9 */

    10 

    11 using System.Globalization;

    12 using System.Text;

    13 

    14 namespace OpenHardwareMonitor.Hardware.LPC {

    15   internal class IT87XX : ISuperIO {

    16        

    17     private readonly ushort address;

    18     private readonly Chip chip;

    19     private readonly byte version;

    20 

    21     private readonly ushort gpioAddress;

    22     private readonly int gpioCount;

    23 

    24     private readonly ushort addressReg;

    25     private readonly ushort dataReg;

    26 

    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];

    31 

    32     private readonly float voltageGain;

    33     private readonly bool has16bitFanCounter;

    34    

    35     // Consts

    36     private const byte ITE_VENDOR_ID = 0x90;

    37        

    38     // Environment Controller

    39     private const byte ADDRESS_REGISTER_OFFSET = 0x05;

    40     private const byte DATA_REGISTER_OFFSET = 0x06;

    41 

    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;

    52 

    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     }

    59 

    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     }

    65 

    66     public byte? ReadGPIO(int index) {

    67       if (index >= gpioCount)

    68         return null;

    69 

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

    71     }

    72 

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

    74       if (index >= gpioCount)

    75         return;

    76 

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

    78     } 

    79 

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

    81 

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

    83 

    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;

    90 

    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;

    96 

    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;

   102 

   103       voltages = new float?[9];

   104       temperatures = new float?[3];

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

   106 

   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       }

   115 

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

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

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

   119       {

   120         has16bitFanCounter = false;

   121       } else {

   122         has16bitFanCounter = true;

   123       }

   124 

   125       // Set the number of GPIO sets

   126       switch (chip) {

   127         case Chip.IT8712F:

   128         case Chip.IT8716F:

   129         case Chip.IT8718F:

   130         case Chip.IT8726F:

   131           gpioCount = 5;

   132           break;

   133         case Chip.IT8720F:

   134         case Chip.IT8721F:

   135           gpioCount = 8;

   136           break;

   137         case Chip.IT8705F: 

   138         case Chip.IT8728F:

   139         case Chip.IT8771E:

   140         case Chip.IT8772E:

   141           gpioCount = 0;

   142           break;

   143       }

   144     }

   145 

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

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

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

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

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

   151 

   152     public string GetReport() {

   153       StringBuilder r = new StringBuilder();

   154 

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

   156       r.AppendLine();

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

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

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

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

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

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

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

   164       r.AppendLine();

   165 

   166       if (!Ring0.WaitIsaBusMutex(100))

   167         return r.ToString();

   168 

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

   170       r.AppendLine();

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

   172       r.AppendLine();

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

   174         r.Append(" "); 

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

   176         r.Append("  ");

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

   178           r.Append(" ");

   179           bool valid;

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

   181           r.Append(

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

   183         }

   184         r.AppendLine();

   185       }

   186       r.AppendLine();

   187 

   188       r.AppendLine("GPIO Registers");

   189       r.AppendLine();

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

   191         r.Append(" ");

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

   193           CultureInfo.InvariantCulture));

   194       }

   195       r.AppendLine();

   196       r.AppendLine();

   197 

   198       Ring0.ReleaseIsaBusMutex();

   199 

   200       return r.ToString();

   201     }

   202 

   203     public void Update() {

   204       if (!Ring0.WaitIsaBusMutex(10))

   205         return;

   206 

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

   208         bool valid;

   209         

   210         float value = 

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

   212 

   213         if (!valid)

   214           continue;

   215         if (value > 0)

   216           voltages[i] = value;  

   217         else

   218           voltages[i] = null;

   219       }

   220 

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

   222         bool valid;

   223         sbyte value = (sbyte)ReadByte(

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

   225         if (!valid)

   226           continue;

   227 

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

   229           temperatures[i] = value;

   230         else

   231           temperatures[i] = null;       

   232       }

   233 

   234       if (has16bitFanCounter) {

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

   236           bool valid;

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

   238           if (!valid)

   239             continue;

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

   241           if (!valid)

   242             continue;

   243 

   244           if (value > 0x3f) {

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

   246           } else {

   247             fans[i] = null;

   248           }

   249         }

   250       } else {

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

   252           bool valid;

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

   254           if (!valid)

   255             continue;

   256 

   257           int divisor = 2;

   258           if (i < 2) {

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

   260             if (!valid)

   261               continue;

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

   263           }

   264 

   265           if (value > 0) {

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

   267           } else {

   268             fans[i] = null;

   269           }

   270         }

   271       }

   272 

   273       Ring0.ReleaseIsaBusMutex();

   274     }

   275   } 

   276 }
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