////////////////////////////////////////////////////////////////////////////////
//
//  Microsoft Research Singularity
//
//  Copyright (c) Microsoft Corporation.  All rights reserved.
//
//  File:   IdeController.cs
//
//  Base Classes and Interfaces for interacting with ATA
//
//  References used:
//  "AT Attachment Interface with Extension (ATA-2)", Revision 4c, DRAFT
//          09/03/97, ISO Working Group T13, http://www.t13.org/
//
//  "AT Attachment 8 - ATA/ATAPI Command Set (ATA8-ACS)", Revision 0, DRAFT
//          08/17/04, ISO Working Group T13, http://www.t13.org/
//

using System;
using System.Collections;
using System.Text;
using System.Threading;
using Microsoft.SingSharp;
using Microsoft.Singularity;
using Microsoft.Singularity.Io;
using Microsoft.Singularity.Configuration;
using Microsoft.Singularity.Channels;
using Microsoft.Singularity.Drivers.IDE;
using Microsoft.Singularity.V1.Services;
using Microsoft.Singularity.Extending;

using Microsoft.Singularity.Directory;

namespace Microsoft.Singularity.Drivers.IDE
{
    // create the resource object for LTR to fill in
    [DriverCategory]
    [Signature("/ata/controller")]
    [EnumeratesDevice("/ata/disk")]
    [EnumeratesDevice("/ata/atapi/...")]
    public class DiskResources : DriverCategoryDeclaration
    {
        [IoIrqRange(0, Default = 0x0e, Shared = true)]
        public readonly IoIrqRange irq;

        // [TODO] do all of these need to be shared?
        [IoPortRange(1, Default = 0x01f0, Length = 0x08, Shared = true)]
        public readonly IoPortRange command;

        [IoPortRange(2, Default = 0x03f4, Length = 0x04, Shared = true)]
        public readonly IoPortRange control;

        [IoPortRange(3, Default = 0xffa0, Length = 0x08, Shared = true)]
        public readonly IoPortRange dma;

        [ExtensionEndpoint]
        public readonly TRef<ExtensionContract.Exp:Start> extension;

        [ServiceEndpoint(typeof(DiskDeviceContract))]
        public readonly TRef<ServiceProviderContract.Exp:Start> service;

        [Endpoint]
        public readonly TRef<VolumeManagerContract.Imp:Start> volman;

        // This should have a custom attribute.
        public static DiskResources Values;

        // LTR will create the rest of this class:

        // LTR creates a private constructor so that the app writer can't
        // instantiate objects of this class
        private DiskResources()
        {
            // endpoint initialization
            extension = new TRef<ExtensionContract.Exp:Start>
                ((!)(Process.GetStartupEndpoint(0) as ExtensionContract.Exp));
            service = new TRef<ServiceProviderContract.Exp:Start>
                ((!)(Process.GetStartupEndpoint(1) as ServiceProviderContract.Exp));
            volman = new TRef<VolumeManagerContract.Imp:Start>
                ((!)(Process.GetStartupEndpoint(2) as VolumeManagerContract.Imp));

            // Io Resource initialization
            IoConfig! config = (!)IoConfig.GetConfig();
            DebugStub.Print("Disk Config: {0}\n", __arglist(config.ToPrint()));

            // dynamic resources
            irq = (IoIrqRange)config.DynamicRanges[0];
            command = (IoPortRange)config.DynamicRanges[1];
            control = (IoPortRange)config.DynamicRanges[2];
            dma = (IoPortRange)config.DynamicRanges[3];
        }

        // LTR creates the static constructor to initialize the singleton.
        static DiskResources()
        {
            Values = new DiskResources();
        }
    }

    public class DiskDriverControl
    {
        private static IoConfig       config;
        private static IdeController  controller;
        private static IdeDisk        disk;
        private static IdeDiskConfig  diskConfig;
        private static IdeDiskConfig  slaveDiskConfig;

        public static void SetMasterDiskConfig(IdeDiskConfig config)
        {
            diskConfig = config;
        }
        public static void SetSlaveDiskConfig(IdeDiskConfig config)
        {
            slaveDiskConfig = config;
        }

        public static int Main(String![]! args)
        {
            string! instance = args[2];
            DebugStub.Print("Disk {0}: Irq={1}\n",
                            __arglist(
                                instance,
                                DiskResources.Values.irq.ToString()));

            // Create the Controller
            controller = IdeController.Create(DiskResources.Values, args[2]);
            controller.Initialize();

            ExtensionContract.Exp! extension = DiskResources.Values.extension.Acquire();
            ServiceProviderContract.Exp! service = DiskResources.Values.service.Acquire();
            VolumeManagerContract.Imp! volman = DiskResources.Values.volman.Acquire();

            //Create the disk
            if (diskConfig == null) {
                if (slaveDiskConfig != null) {
                    diskConfig = slaveDiskConfig;
                    Console.WriteLine(" Using slave disk configuration.");
                    DebugStub.Print("Using slave disk configuration.\n");
                }
            }
            if (diskConfig == null) {
                Console.WriteLine(" Master disk configuration not found.");
                DebugStub.Print("Master disk configuration not found.\n");
                delete service;
                delete extension;
                delete volman;
            }
            else {
                disk = new IdeDisk(diskConfig, instance);
                disk.Run(extension, service, volman);
            }

            if (disk != null) {
                disk.Finalize();
            }

            controller.Finalize();
            return 0;
        }

    }
}