Hardware/LPC/IT87XX.cs
author moel.mich
Thu, 05 Aug 2010 18:06:18 +0000
changeset 163 67be1c62f950
parent 162 2129ccee0bd1
child 165 813d8bc3192f
permissions -rw-r--r--
Added ISA bus mutex support to the super IO detection.
     1 /*
     2   
     3   Version: MPL 1.1/GPL 2.0/LGPL 2.1
     4 
     5   The contents of this file are subject to the Mozilla Public License Version
     6   1.1 (the "License"); you may not use this file except in compliance with
     7   the License. You may obtain a copy of the License at
     8  
     9   http://www.mozilla.org/MPL/
    10 
    11   Software distributed under the License is distributed on an "AS IS" basis,
    12   WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
    13   for the specific language governing rights and limitations under the License.
    14 
    15   The Original Code is the Open Hardware Monitor code.
    16 
    17   The Initial Developer of the Original Code is 
    18   Michael Möller <m.moeller@gmx.ch>.
    19   Portions created by the Initial Developer are Copyright (C) 2009-2010
    20   the Initial Developer. All Rights Reserved.
    21 
    22   Contributor(s):
    23 
    24   Alternatively, the contents of this file may be used under the terms of
    25   either the GNU General Public License Version 2 or later (the "GPL"), or
    26   the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
    27   in which case the provisions of the GPL or the LGPL are applicable instead
    28   of those above. If you wish to allow use of your version of this file only
    29   under the terms of either the GPL or the LGPL, and not to allow others to
    30   use your version of this file under the terms of the MPL, indicate your
    31   decision by deleting the provisions above and replace them with the notice
    32   and other provisions required by the GPL or the LGPL. If you do not delete
    33   the provisions above, a recipient may use your version of this file under
    34   the terms of any one of the MPL, the GPL or the LGPL.
    35  
    36 */
    37 
    38 using System;
    39 using System.Collections.Generic;
    40 using System.Drawing;
    41 using System.Text;
    42 
    43 namespace OpenHardwareMonitor.Hardware.LPC {
    44   public class IT87XX : ISuperIO {
    45        
    46     private ushort address;
    47     private Chip chip;
    48     private byte version;
    49 
    50     private readonly ushort addressReg;
    51     private readonly ushort dataReg;
    52 
    53     private float?[] voltages = new float?[0];
    54     private float?[] temperatures = new float?[0];
    55     private float?[] fans = new float?[0];
    56    
    57     // Consts
    58     private const byte ITE_VENDOR_ID = 0x90;
    59        
    60     // Environment Controller
    61     private const byte ADDRESS_REGISTER_OFFSET = 0x05;
    62     private const byte DATA_REGISTER_OFFSET = 0x06;
    63 
    64     // Environment Controller Registers    
    65     private const byte CONFIGURATION_REGISTER = 0x00;
    66     private const byte TEMPERATURE_BASE_REG = 0x29;
    67     private const byte VENDOR_ID_REGISTER = 0x58;
    68     private const byte FAN_TACHOMETER_16_BIT_ENABLE_REGISTER = 0x0c;
    69     private byte[] FAN_TACHOMETER_REG = 
    70       new byte[] { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
    71     private byte[] FAN_TACHOMETER_EXT_REG =
    72       new byte[] { 0x18, 0x19, 0x1a, 0x81, 0x83 };
    73     private const byte VOLTAGE_BASE_REG = 0x20;
    74 
    75     private byte ReadByte(byte register, out bool valid) {
    76       WinRing0.WriteIoPortByte(addressReg, register);
    77       byte value = WinRing0.ReadIoPortByte(dataReg);
    78       valid = register == WinRing0.ReadIoPortByte(addressReg);
    79       return value;
    80     } 
    81 
    82     public IT87XX(Chip chip, ushort address, 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       
    90       // Check vendor id
    91       bool valid;
    92       byte vendorId = ReadByte(VENDOR_ID_REGISTER, out valid);       
    93       if (!valid || vendorId != ITE_VENDOR_ID)
    94         return;
    95 
    96       // Bit 0x10 of the configuration register should always be 1
    97       if ((ReadByte(CONFIGURATION_REGISTER, out valid) & 0x10) == 0)
    98         return;
    99       if (!valid)
   100         return;
   101 
   102       voltages = new float?[9];
   103       temperatures = new float?[3];
   104       fans = new float?[5];
   105     }
   106 
   107     public Chip Chip { get { return chip; } }
   108     public float?[] Voltages { get { return voltages; } }
   109     public float?[] Temperatures { get { return temperatures; } }
   110     public float?[] Fans { get { return fans; } }
   111 
   112     public string GetReport() {
   113       StringBuilder r = new StringBuilder();
   114 
   115       r.AppendLine("LPC " + this.GetType().Name);
   116       r.AppendLine();
   117       r.Append("Chip ID: 0x"); r.AppendLine(chip.ToString("X"));
   118       r.Append("Chip Version: 0x"); r.AppendLine(version.ToString("X"));
   119       r.Append("Base Address: 0x"); r.AppendLine(address.ToString("X4"));
   120       r.AppendLine();
   121 
   122       if (!WinRing0.WaitIsaBusMutex(100))
   123         return r.ToString();
   124 
   125       r.AppendLine("Environment Controller Registers");
   126       r.AppendLine();
   127       r.AppendLine("      00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F");
   128       r.AppendLine();
   129       for (int i = 0; i <= 0xA; i++) {
   130         r.Append(" "); r.Append((i << 4).ToString("X2")); r.Append("  ");
   131         for (int j = 0; j <= 0xF; j++) {
   132           r.Append(" ");
   133           bool valid;
   134           byte value = ReadByte((byte)((i << 4) | j), out valid);
   135           if (valid)
   136             r.Append(value.ToString("X2"));
   137           else
   138             r.Append("??");
   139         }
   140         r.AppendLine();
   141       }
   142       r.AppendLine();
   143 
   144       WinRing0.ReleaseIsaBusMutex();
   145 
   146       return r.ToString();
   147     }
   148 
   149     public void Update() {
   150       if (!WinRing0.WaitIsaBusMutex(10))
   151         return;
   152 
   153       for (int i = 0; i < voltages.Length; i++) {
   154         bool valid;
   155         float value = 0.001f * ((int)ReadByte(
   156           (byte)(VOLTAGE_BASE_REG + i), out valid) << 4);
   157         if (!valid)
   158           continue;
   159         if (value > 0)
   160           voltages[i] = value;  
   161         else
   162           voltages[i] = null;
   163       }
   164 
   165       for (int i = 0; i < temperatures.Length; i++) {
   166         bool valid;
   167         sbyte value = (sbyte)ReadByte(
   168           (byte)(TEMPERATURE_BASE_REG + i), out valid);
   169         if (!valid)
   170           continue;
   171 
   172         if (value < sbyte.MaxValue && value > 0)
   173           temperatures[i] = value;
   174         else
   175           temperatures[i] = null;       
   176       }
   177 
   178       for (int i = 0; i < fans.Length; i++) {
   179         bool valid;
   180         int value = ReadByte(FAN_TACHOMETER_REG[i], out valid);
   181         if (!valid) 
   182           continue;
   183         value |= ReadByte(FAN_TACHOMETER_EXT_REG[i], out valid) << 8;
   184         if (!valid)
   185           continue;
   186 
   187         if (value > 0x3f) {
   188           fans[i] = (value < 0xffff) ? 1.35e6f / ((value) * 2) : 0;
   189         } else {
   190           fans[i] = null;
   191         }
   192       }
   193 
   194       WinRing0.ReleaseIsaBusMutex();
   195     }
   196   } 
   197 }