Hardware/LPC/IT87XX.cs
author moel.mich
Thu, 20 Jan 2011 21:31:54 +0000
changeset 247 6dc755f1970e
parent 236 763675f19ff4
child 272 037a2d66082f
permissions -rw-r--r--
Added a minimal control interface to allow manual fan control and implemented the interface for ATI GPUs.
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/*
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  Version: MPL 1.1/GPL 2.0/LGPL 2.1
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  The contents of this file are subject to the Mozilla Public License Version
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  1.1 (the "License"); you may not use this file except in compliance with
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  the License. You may obtain a copy of the License at
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  http://www.mozilla.org/MPL/
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  Software distributed under the License is distributed on an "AS IS" basis,
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  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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  for the specific language governing rights and limitations under the License.
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  The Original Code is the Open Hardware Monitor code.
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  The Initial Developer of the Original Code is 
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  Michael Möller <m.moeller@gmx.ch>.
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  Portions created by the Initial Developer are Copyright (C) 2009-2010
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  the Initial Developer. All Rights Reserved.
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  Contributor(s):
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  Alternatively, the contents of this file may be used under the terms of
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  either the GNU General Public License Version 2 or later (the "GPL"), or
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  the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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  in which case the provisions of the GPL or the LGPL are applicable instead
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  of those above. If you wish to allow use of your version of this file only
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  under the terms of either the GPL or the LGPL, and not to allow others to
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  use your version of this file under the terms of the MPL, indicate your
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  decision by deleting the provisions above and replace them with the notice
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  and other provisions required by the GPL or the LGPL. If you do not delete
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  the provisions above, a recipient may use your version of this file under
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  the terms of any one of the MPL, the GPL or the LGPL.
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*/
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using System.Globalization;
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using System.Text;
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namespace OpenHardwareMonitor.Hardware.LPC {
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  internal class IT87XX : ISuperIO {
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    private readonly ushort address;
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    private readonly Chip chip;
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    private readonly byte version;
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    private readonly ushort gpioAddress;
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    private readonly int gpioCount;
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    private readonly ushort addressReg;
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    private readonly ushort dataReg;
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    private readonly float?[] voltages = new float?[0];
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    private readonly float?[] temperatures = new float?[0];
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    private readonly float?[] fans = new float?[0];
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    private readonly float voltageGain;
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    // Consts
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    private const byte ITE_VENDOR_ID = 0x90;
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    // Environment Controller
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    private const byte ADDRESS_REGISTER_OFFSET = 0x05;
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    private const byte DATA_REGISTER_OFFSET = 0x06;
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    // Environment Controller Registers    
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    private const byte CONFIGURATION_REGISTER = 0x00;
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    private const byte TEMPERATURE_BASE_REG = 0x29;
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    private const byte VENDOR_ID_REGISTER = 0x58;
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    private const byte FAN_TACHOMETER_16_BIT_ENABLE_REGISTER = 0x0c;
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    private readonly byte[] FAN_TACHOMETER_REG = 
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      new byte[] { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
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    private readonly byte[] FAN_TACHOMETER_EXT_REG =
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      new byte[] { 0x18, 0x19, 0x1a, 0x81, 0x83 };
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    private const byte VOLTAGE_BASE_REG = 0x20;
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    private byte ReadByte(byte register, out bool valid) {
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      Ring0.WriteIoPort(addressReg, register);
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      byte value = Ring0.ReadIoPort(dataReg);
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      valid = register == Ring0.ReadIoPort(addressReg);
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      return value;
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    }
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    private bool WriteByte(byte register, byte value) {
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      Ring0.WriteIoPort(addressReg, register);
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      Ring0.WriteIoPort(dataReg, value);
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      return register == Ring0.ReadIoPort(addressReg);
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    }
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    public byte? ReadGPIO(int index) {
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      if (index >= gpioCount)
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        return null;
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      return Ring0.ReadIoPort((ushort)(gpioAddress + index));
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    }
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    public void WriteGPIO(int index, byte value) {
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      if (index >= gpioCount)
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        return;
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      Ring0.WriteIoPort((ushort)(gpioAddress + index), value);
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    }
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    public IT87XX(Chip chip, ushort address, ushort gpioAddress, byte version) {
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      this.address = address;
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      this.chip = chip;
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      this.version = version;
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      this.addressReg = (ushort)(address + ADDRESS_REGISTER_OFFSET);
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      this.dataReg = (ushort)(address + DATA_REGISTER_OFFSET);
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      this.gpioAddress = gpioAddress;
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      // Check vendor id
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      bool valid;
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      byte vendorId = ReadByte(VENDOR_ID_REGISTER, out valid);       
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      if (!valid || vendorId != ITE_VENDOR_ID)
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        return;
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      // Bit 0x10 of the configuration register should always be 1
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      if ((ReadByte(CONFIGURATION_REGISTER, out valid) & 0x10) == 0)
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        return;
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      if (!valid)
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        return;
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      voltages = new float?[9];
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      temperatures = new float?[3];
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      fans = new float?[5];
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      // The IT8721F uses a 12mV resultion ADC, all others 16mV
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      if (chip == Chip.IT8721F) {
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        voltageGain = 0.012f;
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      } else {
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        voltageGain = 0.016f;
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      }
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      // Set the number of GPIO sets
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      switch (chip) {
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        case Chip.IT8712F:
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        case Chip.IT8716F:
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        case Chip.IT8718F:
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        case Chip.IT8726F:
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          gpioCount = 5;
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          break;
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        case Chip.IT8720F:
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        case Chip.IT8721F:
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          gpioCount = 8;
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          break;
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      }
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    }
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    public Chip Chip { get { return chip; } }
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    public float?[] Voltages { get { return voltages; } }
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    public float?[] Temperatures { get { return temperatures; } }
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    public float?[] Fans { get { return fans; } }
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    public string GetReport() {
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      StringBuilder r = new StringBuilder();
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      r.AppendLine("LPC " + this.GetType().Name);
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      r.AppendLine();
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      r.Append("Chip ID: 0x"); r.AppendLine(chip.ToString("X"));
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      r.Append("Chip Version: 0x"); r.AppendLine(
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        version.ToString("X", CultureInfo.InvariantCulture));
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      r.Append("Base Address: 0x"); r.AppendLine(
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        address.ToString("X4", CultureInfo.InvariantCulture));
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      r.Append("GPIO Address: 0x"); r.AppendLine(
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        gpioAddress.ToString("X4", CultureInfo.InvariantCulture));
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      r.AppendLine();
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      if (!Ring0.WaitIsaBusMutex(100))
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        return r.ToString();
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      r.AppendLine("Environment Controller Registers");
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      r.AppendLine();
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      r.AppendLine("      00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F");
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      r.AppendLine();
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      for (int i = 0; i <= 0xA; i++) {
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        r.Append(" "); 
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        r.Append((i << 4).ToString("X2", CultureInfo.InvariantCulture)); 
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        r.Append("  ");
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        for (int j = 0; j <= 0xF; j++) {
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          r.Append(" ");
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          bool valid;
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          byte value = ReadByte((byte)((i << 4) | j), out valid);
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          r.Append(
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            valid ? value.ToString("X2", CultureInfo.InvariantCulture) : "??");
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        }
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        r.AppendLine();
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      }
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      r.AppendLine();
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      r.AppendLine("GPIO Registers");
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      r.AppendLine();
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      for (int i = 0; i < gpioCount; i++) {
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        r.Append(" ");
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        r.Append(ReadGPIO(i).Value.ToString("X2",
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          CultureInfo.InvariantCulture));
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      }
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      r.AppendLine();
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      r.AppendLine();
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      Ring0.ReleaseIsaBusMutex();
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      return r.ToString();
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    }
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    public void Update() {
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      if (!Ring0.WaitIsaBusMutex(10))
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        return;
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      for (int i = 0; i < voltages.Length; i++) {
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        bool valid;
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        float value = 
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          voltageGain * ReadByte((byte)(VOLTAGE_BASE_REG + i), out valid);   
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        if (!valid)
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          continue;
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        if (value > 0)
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          voltages[i] = value;  
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        else
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          voltages[i] = null;
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      }
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      for (int i = 0; i < temperatures.Length; i++) {
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        bool valid;
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        sbyte value = (sbyte)ReadByte(
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          (byte)(TEMPERATURE_BASE_REG + i), out valid);
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        if (!valid)
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          continue;
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        if (value < sbyte.MaxValue && value > 0)
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          temperatures[i] = value;
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        else
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          temperatures[i] = null;       
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      }
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      for (int i = 0; i < fans.Length; i++) {
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        bool valid;
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        int value = ReadByte(FAN_TACHOMETER_REG[i], out valid);
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        if (!valid) 
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          continue;
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        value |= ReadByte(FAN_TACHOMETER_EXT_REG[i], out valid) << 8;
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        if (!valid)
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          continue;
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        if (value > 0x3f) {
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          fans[i] = (value < 0xffff) ? 1.35e6f / ((value) * 2) : 0;
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        } else {
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          fans[i] = null;
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        }
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      }
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      Ring0.ReleaseIsaBusMutex();
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    }
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  } 
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}