/*

   Version: MPL 1.1/GPL 2.0/LGPL 2.1

   The contents of this file are subject to the Mozilla Public License Version

   1.1 (the "License"); you may not use this file except in compliance with

   the License. You may obtain a copy of the License at

   http://www.mozilla.org/MPL/

   Software distributed under the License is distributed on an "AS IS" basis,

   WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License

   for the specific language governing rights and limitations under the License.

   The Original Code is the Open Hardware Monitor code.

   The Initial Developer of the Original Code is 

   Michael Möller <m.moeller@gmx.ch>.

   Portions created by the Initial Developer are Copyright (C) 2009-2010

   the Initial Developer. All Rights Reserved.

   Contributor(s):

   Alternatively, the contents of this file may be used under the terms of

   either the GNU General Public License Version 2 or later (the "GPL"), or

   the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),

   in which case the provisions of the GPL or the LGPL are applicable instead

   of those above. If you wish to allow use of your version of this file only

   under the terms of either the GPL or the LGPL, and not to allow others to

   use your version of this file under the terms of the MPL, indicate your

   decision by deleting the provisions above and replace them with the notice

   and other provisions required by the GPL or the LGPL. If you do not delete

   the provisions above, a recipient may use your version of this file under

   the terms of any one of the MPL, the GPL or the LGPL.

 */

 using System;

 using System.Collections.Generic;

 using System.Text;

 using System.Threading;

 namespace OpenHardwareMonitor.Hardware.LPC {

   public class LPCIO {

     private List<ISuperIO> superIOs = new List<ISuperIO>();

     private StringBuilder report = new StringBuilder();

     private Chip chip = Chip.Unknown;

     // I/O Ports

     private ushort[] REGISTER_PORTS = new ushort[] { 0x2e, 0x4e };

     private ushort[] VALUE_PORTS = new ushort[] { 0x2f, 0x4f };

     private ushort registerPort;

     private ushort valuePort;

     // Registers

     private const byte CONFIGURATION_CONTROL_REGISTER = 0x02;

     private const byte DEVCIE_SELECT_REGISTER = 0x07;

     private const byte CHIP_ID_REGISTER = 0x20;

     private const byte CHIP_REVISION_REGISTER = 0x21;

     private const byte BASE_ADDRESS_REGISTER = 0x60;

     private byte ReadByte(byte register) {

       WinRing0.WriteIoPortByte(registerPort, register);

       return WinRing0.ReadIoPortByte(valuePort);

     } 

     private ushort ReadWord(byte register) {

       return (ushort)((ReadByte(register) << 8) | 

         ReadByte((byte)(register + 1)));

     }

     private void Select(byte logicalDeviceNumber) {

       WinRing0.WriteIoPortByte(registerPort, DEVCIE_SELECT_REGISTER);

       WinRing0.WriteIoPortByte(valuePort, logicalDeviceNumber);

     }

     // ITE

     private const byte IT87_ENVIRONMENT_CONTROLLER_LDN = 0x04;    

     private void IT87Enter() {

       WinRing0.WriteIoPortByte(registerPort, 0x87);

       WinRing0.WriteIoPortByte(registerPort, 0x01);

       WinRing0.WriteIoPortByte(registerPort, 0x55);

       WinRing0.WriteIoPortByte(registerPort, 0x55);

     }

     private void IT87Exit() {

       WinRing0.WriteIoPortByte(registerPort, CONFIGURATION_CONTROL_REGISTER);

       WinRing0.WriteIoPortByte(valuePort, 0x02);

     }

     // Winbond, Fintek

     private const byte FINTEK_VENDOR_ID_REGISTER = 0x23;

     private const ushort FINTEK_VENDOR_ID = 0x1934;

     private const byte WINBOND_HARDWARE_MONITOR_LDN = 0x0B;

     private const byte F71858_HARDWARE_MONITOR_LDN = 0x02;

     private const byte FINTEK_HARDWARE_MONITOR_LDN = 0x04;

     private void WinbondFintekEnter() {

       WinRing0.WriteIoPortByte(registerPort, 0x87);

       WinRing0.WriteIoPortByte(registerPort, 0x87);

     }

     private void WinbondFintekExit() {

       WinRing0.WriteIoPortByte(registerPort, 0xAA);      

     }

     // SMSC

     private void SMSCEnter() {

       WinRing0.WriteIoPortByte(registerPort, 0x55);

     }

     private void SMSCExit() {

       WinRing0.WriteIoPortByte(registerPort, 0xAA);

     }

     public LPCIO() {

       if (!WinRing0.IsAvailable)

         return;

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

         registerPort = REGISTER_PORTS[i];

         valuePort = VALUE_PORTS[i];

         WinbondFintekEnter();

         byte logicalDeviceNumber;

         byte id = ReadByte(CHIP_ID_REGISTER);

         byte revision = ReadByte(CHIP_REVISION_REGISTER);

         chip = Chip.Unknown;

         logicalDeviceNumber = 0;

         switch (id) {

           case 0x05:

             switch (revision) {

               case 0x07:

                 chip = Chip.F71858;

                 logicalDeviceNumber = F71858_HARDWARE_MONITOR_LDN;

                 break;

               case 0x41:

                 chip = Chip.F71882;

                 logicalDeviceNumber = FINTEK_HARDWARE_MONITOR_LDN;

                 break;              

             } break;

           case 0x06:

             switch (revision) {             

               case 0x01:

                 chip = Chip.F71862;

                 logicalDeviceNumber = FINTEK_HARDWARE_MONITOR_LDN;

                 break;              

             } break;

           case 0x07:

             switch (revision) {

               case 0x23:

                 chip = Chip.F71889F;

                 logicalDeviceNumber = FINTEK_HARDWARE_MONITOR_LDN;

                 break;              

             } break;

           case 0x08:

             switch (revision) {

               case 0x14:

                 chip = Chip.F71869;

                 logicalDeviceNumber = FINTEK_HARDWARE_MONITOR_LDN;

                 break;              

             } break;

           case 0x09:

             switch (revision) {

               case 0x09:

                 chip = Chip.F71889ED;

                 logicalDeviceNumber = FINTEK_HARDWARE_MONITOR_LDN;

                 break;              

             } break;

           case 0x52:

             switch (revision) {

               case 0x17:

               case 0x3A:

               case 0x41:

                 chip = Chip.W83627HF;

                 logicalDeviceNumber = WINBOND_HARDWARE_MONITOR_LDN;

                 break;             

             } break;

           case 0x82:

             switch (revision) {

               case 0x83:

                 chip = Chip.W83627THF;

                 logicalDeviceNumber = WINBOND_HARDWARE_MONITOR_LDN;

                 break;

             } break;

           case 0x85:

             switch (revision) {

               case 0x41:

                 chip = Chip.W83687THF;

                 logicalDeviceNumber = WINBOND_HARDWARE_MONITOR_LDN;

                 break;

             } break;

           case 0x88:

             switch (revision & 0xF0) {

               case 0x50:

               case 0x60:

                 chip = Chip.W83627EHF;

                 logicalDeviceNumber = WINBOND_HARDWARE_MONITOR_LDN;

                 break;

             } break;

           case 0xA0:

             switch (revision & 0xF0) {

               case 0x20: 

                 chip = Chip.W83627DHG;

                 logicalDeviceNumber = WINBOND_HARDWARE_MONITOR_LDN;  

                 break;             

             } break;

           case 0xA5:

             switch (revision & 0xF0) {

               case 0x10:

                 chip = Chip.W83667HG;

                 logicalDeviceNumber = WINBOND_HARDWARE_MONITOR_LDN;

                 break;

             } break;

           case 0xB0:

             switch (revision & 0xF0) {

               case 0x70:

                 chip = Chip.W83627DHGP;

                 logicalDeviceNumber = WINBOND_HARDWARE_MONITOR_LDN;

                 break;             

             } break;

           case 0xB3:

             switch (revision & 0xF0) {

               case 0x50:

                 chip = Chip.W83667HGB;

                 logicalDeviceNumber = WINBOND_HARDWARE_MONITOR_LDN;

                 break;

             } break; 

         }

         if (chip == Chip.Unknown) {

           if (id != 0 && id != 0xff) {

             WinbondFintekExit();

             report.Append("Chip ID: Unknown Winbond / Fintek with ID 0x"); 

             report.AppendLine(((id << 8) | revision).ToString("X"));

             report.AppendLine();

           }

         } else {

           Select(logicalDeviceNumber);

           ushort address = ReadWord(BASE_ADDRESS_REGISTER);          

           Thread.Sleep(1);

           ushort verify = ReadWord(BASE_ADDRESS_REGISTER);

           ushort vendorID = ReadWord(FINTEK_VENDOR_ID_REGISTER);

           WinbondFintekExit();

           if (address != verify) {            

             report.Append("Chip ID: 0x"); 

             report.AppendLine(chip.ToString("X"));

             report.Append("Chip revision: 0x"); 

             report.AppendLine(revision.ToString("X"));

             report.AppendLine("Error: Address verification failed");

             report.AppendLine();

             return;

           }

           // some Fintek chips have address register offset 0x05 added already

           if ((address & 0x07) == 0x05)

             address &= 0xFFF8;

           if (address < 0x100 || (address & 0xF007) != 0) {            

             report.Append("Chip ID: 0x");

             report.AppendLine(chip.ToString("X"));

             report.Append("Chip revision: 0x");

             report.AppendLine(revision.ToString("X"));

             report.Append("Error: Invalid address 0x");

             report.AppendLine(address.ToString("X"));

             report.AppendLine();

             return;

           }

           switch (chip) {

             case Chip.W83627DHG:

             case Chip.W83627DHGP:

             case Chip.W83627EHF:

             case Chip.W83627HF:

             case Chip.W83627THF:

             case Chip.W83667HG:

             case Chip.W83667HGB:

             case Chip.W83687THF:

               superIOs.Add(new W836XX(chip, revision, address));

               break;

             case Chip.F71858:

             case Chip.F71862:

             case Chip.F71869:

             case Chip.F71882:

             case Chip.F71889ED:

             case Chip.F71889F:

               if (vendorID != FINTEK_VENDOR_ID) {

                 report.Append("Chip ID: 0x");

                 report.AppendLine(chip.ToString("X"));

                 report.Append("Chip revision: 0x");

                 report.AppendLine(revision.ToString("X"));

                 report.Append("Error: Invalid vendor ID 0x");

                 report.AppendLine(vendorID.ToString("X"));

                 report.AppendLine();

                 return;

               }

               superIOs.Add(new F718XX(chip, address));

               break;

             default: break;

           }

           return;

         }

         IT87Enter();

         ushort chipID = ReadWord(CHIP_ID_REGISTER);

         switch (chipID) {

           case 0x8712: chip = Chip.IT8712F; break;

           case 0x8716: chip = Chip.IT8716F; break;

           case 0x8718: chip = Chip.IT8718F; break;

           case 0x8720: chip = Chip.IT8720F; break;

           case 0x8726: chip = Chip.IT8726F; break; 

           default: chip = Chip.Unknown; break;

         }

         if (chip == Chip.Unknown) {

           if (chipID != 0 && chipID != 0xffff) {

             IT87Exit();

             report.Append("Chip ID: Unknown ITE with ID 0x");

             report.AppendLine(chipID.ToString("X"));

             report.AppendLine();

           }

         } else {

           Select(IT87_ENVIRONMENT_CONTROLLER_LDN);

           ushort address = ReadWord(BASE_ADDRESS_REGISTER);

           Thread.Sleep(1);

           ushort verify = ReadWord(BASE_ADDRESS_REGISTER);

           IT87Exit();

           if (address != verify || address < 0x100 || (address & 0xF007) != 0) {

             report.Append("Chip ID: 0x");

             report.AppendLine(chip.ToString("X"));            

             report.Append("Error: Invalid address 0x");

             report.AppendLine(address.ToString("X"));

             report.AppendLine();

             return;

           }

          superIOs.Add(new IT87XX(chip, address));

           return;

         }

         SMSCEnter();

         chipID = ReadWord(CHIP_ID_REGISTER);

         switch (chipID) {

           default: chip = Chip.Unknown; break;

         }

         if (chip == Chip.Unknown) {

           if (chipID != 0 && chipID != 0xffff) {

             SMSCExit();

             report.Append("Chip ID: Unknown SMSC with ID 0x");

             report.AppendLine(chipID.ToString("X"));

             report.AppendLine();

           }

         } else {

           SMSCExit();

           return;

         }

       }   

     }

     public ISuperIO[] SuperIO {

       get {

         return superIOs.ToArray();

       }

     }

     public string GetReport() {

       if (report.Length > 0) {

         report.Insert(0, "LPCIO" + Environment.NewLine +

           Environment.NewLine);        

         return report.ToString();

       } else

         return null;

     }

   }

 }