832 lines
22 KiB
C
832 lines
22 KiB
C
/*++
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Copyright (c) 1989 Microsoft Corporation
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Module Name:
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hwdata.c
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Abstract:
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This module contains the C code to set up mouse configuration data.
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Author:
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Shie-Lin Tzong (shielint) 18-Jan-1991
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Revision History:
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--*/
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#include "hwdetect.h"
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#include "string.h"
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#if !defined(_GAMBIT_)
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#if defined(NEC_98)
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extern PMOUSE_INFORMATION
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LookFor98BusMouse (
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VOID
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);
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#else
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//
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// External References
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//
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extern PMOUSE_INFORMATION
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LookForPS2Mouse (
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VOID
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);
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extern PMOUSE_INFORMATION
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LookForInportMouse (
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VOID
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);
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#endif
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extern PMOUSE_INFORMATION
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LookForSerialMouse (
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VOID
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);
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#if defined(NEC_98)
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#else
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extern PMOUSE_INFORMATION
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LookForBusMouse (
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VOID
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);
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extern VOID
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Empty8042 (
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VOID
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);
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extern USHORT
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HwGetKey (
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VOID
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);
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extern VOID
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HwPushKey (
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USHORT Key
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);
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#endif
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#endif // _GAMBIT_
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extern USHORT SavedKey;
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//
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// Define the master and slave i8259 IRQ bitmask.
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//
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#define MASTER_IRQ_MASK_BITS 0xB8
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#define SLAVE_IRQ_MASK_BITS 0x02
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//
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// Define the lowest i8259 IRQ that the Inport mouse can reside on. This
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// has the highest NT priority.
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//
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#define INPORT_LOWEST_IRQ 0x03
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//
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// Define the Inport chip reset value.
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//
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#define INPORT_RESET 0x80
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//
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// Define the data registers (pointed to by the Inport address register).
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//
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#define INPORT_DATA_REGISTER_1 1
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#define INPORT_DATA_REGISTER_2 2
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//
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// Define the Inport mouse mode register and mode bits.
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//
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#define INPORT_MODE_REGISTER 7
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#define INPORT_MODE_0 0x00 // 0 HZ - INTR = 0
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#define INPORT_MODE_30HZ 0x01
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#define INPORT_MODE_50HZ 0x02
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#define INPORT_MODE_100HZ 0x03
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#define INPORT_MODE_200HZ 0x04
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#define INPORT_MODE_1 0x06 // 0 HZ - INTR = 1
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#define INPORT_DATA_INTERRUPT_ENABLE 0x08
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#define INPORT_TIMER_INTERRUPT_ENABLE 0x10
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#define INPORT_MODE_HOLD 0x20
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#define INPORT_MODE_QUADRATURE 0x00
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//
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// Video adaptor type identifiers.
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//
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#if defined(NEC_98)
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PUCHAR MouseIdentifier[] = {
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"UNKNOWN",
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"NO MOUSE",
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"MICROSOFT",
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"MICROSOFT BALLPOINT",
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"LOGITECH",
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"NEC"
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};
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#else //
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PUCHAR MouseIdentifier[] = {
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"UNKNOWN",
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"NO MOUSE",
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"MICROSOFT",
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"MICROSOFT BALLPOINT",
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"LOGITECH"
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};
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#endif
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#if defined(NEC_98)
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PUCHAR MouseSubidentifier[] = {
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"",
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" PS2 MOUSE",
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" SERIAL MOUSE",
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" INPORT MOUSE",
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" BUS MOUSE",
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" PS2 MOUSE WITH WHEEL",
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" SERIAL MOUSE WITH WHEEL",
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" PC-9800 BUS MOUSE",
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" N5200/E KB MOUSE"
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};
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#else
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PUCHAR MouseSubidentifier[] = {
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"",
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" PS2 MOUSE",
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" SERIAL MOUSE",
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" INPORT MOUSE",
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" BUS MOUSE",
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" PS2 MOUSE WITH WHEEL",
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" SERIAL MOUSE WITH WHEEL"
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};
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#endif
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//
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// The following table translates keyboard make code to
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// ascii code. Note, only 0-9 and A-Z are translated.
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// Everything else is translated to '?'
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//
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UCHAR MakeToAsciiTable[] = {
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0x3f, 0x3f, 0x31, 0x32, 0x33, // ?, ?, 1, 2, 3,
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0x34, 0x35, 0x36, 0x37, 0x38, // 4, 5, 6, 7, 8,
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0x39, 0x30, 0x3f, 0x3f, 0x3f, // 9, 0, ?, ?, ?,
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0x3f, 0x51, 0x57, 0x45, 0x52, // ?, Q, W, E, R,
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0x54, 0x59, 0x55, 0x49, 0x4f, // T, Y, U, I, O,
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0x50, 0x3f, 0x3f, 0x3f, 0x3f, // P, ?, ?, ?, ?,
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0x41, 0x53, 0x44, 0x46, 0x47, // A, S, D, F, G,
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0x48, 0x4a, 0x4b, 0x4c, 0x3f, // H, J, K, L, ?,
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0x3f, 0x3f, 0x3f, 0x3f, 0x5a, // ?, ?, ?, ?, Z,
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0x58, 0x43, 0x56, 0x42, 0x4e, // X, C, V, B, N,
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0x4d}; // W
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#define MAX_MAKE_CODE_TRANSLATED 0x32
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static ULONG MouseControllerKey = 0;
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FPFWCONFIGURATION_COMPONENT_DATA
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SetMouseConfigurationData (
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PMOUSE_INFORMATION MouseInfo,
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FPFWCONFIGURATION_COMPONENT_DATA MouseList
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)
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/*++
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Routine Description:
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This routine fills in mouse configuration data.
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Arguments:
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MouseInfo - Supplies a pointer to the MOUSE_INFOR structure
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MouseList - Supplies a pointer to the existing mouse component list.
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Returns:
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Returns a pointer to our mice controller list.
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--*/
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{
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UCHAR i = 0;
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FPFWCONFIGURATION_COMPONENT_DATA CurrentEntry, Controller, PeripheralEntry;
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FPFWCONFIGURATION_COMPONENT Component;
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HWCONTROLLER_DATA ControlData;
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USHORT z, Length;
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FPUCHAR fpString;
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#if defined(NEC_98)
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#if DBG
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BlPrint("98MousePORT=%x\n", MouseInfo->MousePort);
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BlPrint("98MouseMouseSubtype=%x\n", MouseInfo->MouseSubtype);
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BlPrint("98MouseVector=%x\n", MouseInfo->MouseIrq);
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BlPrint("98MouseMouseList=%x\n", MouseList);
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#endif // DBG
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#endif // defined(NEC_98)
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if ((MouseInfo->MouseSubtype != SERIAL_MOUSE) &&
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(MouseInfo->MouseSubtype != SERIAL_MOUSE_WITH_WHEEL)) {
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//
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// Initialize Controller data
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//
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ControlData.NumberPortEntries = 0;
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ControlData.NumberIrqEntries = 0;
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ControlData.NumberMemoryEntries = 0;
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ControlData.NumberDmaEntries = 0;
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z = 0;
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//
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// If it is not SERIAL_MOUSE, set up controller component
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//
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Controller = (FPFWCONFIGURATION_COMPONENT_DATA)HwAllocateHeap (
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sizeof(FWCONFIGURATION_COMPONENT_DATA), TRUE);
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Component = &Controller->ComponentEntry;
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Component->Class = ControllerClass;
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Component->Type = PointerController;
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Component->Flags.Input = 1;
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Component->Version = 0;
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Component->Key = MouseControllerKey;
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MouseControllerKey++;
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Component->AffinityMask = 0xffffffff;
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Component->IdentifierLength = 0;
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Component->Identifier = NULL;
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//
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// If we have mouse irq or port information, allocate configuration
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// data space for mouse controller component to store these information
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//
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if (MouseInfo->MouseIrq != 0xffff || MouseInfo->MousePort != 0xffff) {
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#if !defined(_GAMBIT_)
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//
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// Set up port and Irq information
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//
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if (MouseInfo->MousePort != 0xffff) {
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ControlData.NumberPortEntries = 1;
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ControlData.DescriptorList[z].Type = RESOURCE_PORT;
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ControlData.DescriptorList[z].ShareDisposition =
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CmResourceShareDeviceExclusive;
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ControlData.DescriptorList[z].Flags = CM_RESOURCE_PORT_IO;
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ControlData.DescriptorList[z].u.Port.Start.LowPart =
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(ULONG)MouseInfo->MousePort;
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ControlData.DescriptorList[z].u.Port.Start.HighPart = 0;
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ControlData.DescriptorList[z].u.Port.Length = 4;
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z++;
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}
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if (MouseInfo->MouseIrq != 0xffff) {
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ControlData.NumberIrqEntries = 1;
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ControlData.DescriptorList[z].Type = RESOURCE_INTERRUPT;
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ControlData.DescriptorList[z].ShareDisposition =
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CmResourceShareUndetermined;
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ControlData.DescriptorList[z].u.Interrupt.Affinity = ALL_PROCESSORS;
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ControlData.DescriptorList[z].u.Interrupt.Level =
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(ULONG)MouseInfo->MouseIrq;
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ControlData.DescriptorList[z].u.Interrupt.Vector =
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(ULONG)MouseInfo->MouseIrq;
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if (HwBusType == MACHINE_TYPE_MCA) {
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ControlData.DescriptorList[z].Flags =
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LEVEL_SENSITIVE;
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} else {
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//
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// For EISA the LevelTriggered is temporarily set to FALSE.
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//
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ControlData.DescriptorList[z].Flags = EDGE_TRIGGERED;
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}
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}
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#endif // _GAMBIT_
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Controller->ConfigurationData =
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HwSetUpResourceDescriptor(Component,
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NULL,
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&ControlData,
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0,
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NULL
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);
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} else {
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//
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// Otherwise, we don't have configuration data for the controller
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//
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Controller->ConfigurationData = NULL;
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Component->ConfigurationDataLength = 0;
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}
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}
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//
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// Set up Mouse peripheral component
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//
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PeripheralEntry = (FPFWCONFIGURATION_COMPONENT_DATA)HwAllocateHeap (
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sizeof(FWCONFIGURATION_COMPONENT_DATA), TRUE);
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Component = &PeripheralEntry->ComponentEntry;
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Component->Class = PeripheralClass;
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Component->Type = PointerPeripheral;
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Component->Flags.Input = 1;
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Component->Version = 0;
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Component->Key = 0;
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Component->AffinityMask = 0xffffffff;
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Component->ConfigurationDataLength = 0;
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PeripheralEntry->ConfigurationData = (FPVOID)NULL;
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//
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// If Mouse PnP device id is found, translate it to ascii code.
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// (The mouse device id is presented to us by keyboard make code.)
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//
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Length = 0;
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if (MouseInfo->DeviceIdLength != 0) {
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USHORT i;
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if (MouseInfo->MouseSubtype == PS_MOUSE_WITH_WHEEL) {
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for (i = 0; i < MouseInfo->DeviceIdLength; i++) {
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if (MouseInfo->DeviceId[i] > MAX_MAKE_CODE_TRANSLATED) {
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MouseInfo->DeviceId[i] = '?';
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} else {
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MouseInfo->DeviceId[i] = MakeToAsciiTable[MouseInfo->DeviceId[i]];
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}
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}
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} else if (MouseInfo->MouseSubtype == SERIAL_MOUSE_WITH_WHEEL) {
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for (i = 0; i < MouseInfo->DeviceIdLength; i++) {
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MouseInfo->DeviceId[i] += 0x20;
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}
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}
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Length = MouseInfo->DeviceIdLength + 3;
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}
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Length += strlen(MouseIdentifier[MouseInfo->MouseType]) +
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strlen(MouseSubidentifier[MouseInfo->MouseSubtype]) + 1;
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fpString = (FPUCHAR)HwAllocateHeap(Length, FALSE);
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if (MouseInfo->DeviceIdLength != 0) {
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_fstrcpy(fpString, MouseInfo->DeviceId);
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_fstrcat(fpString, " - ");
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_fstrcat(fpString, MouseIdentifier[MouseInfo->MouseType]);
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} else {
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_fstrcpy(fpString, MouseIdentifier[MouseInfo->MouseType]);
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}
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_fstrcat(fpString, MouseSubidentifier[MouseInfo->MouseSubtype]);
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Component->IdentifierLength = Length;
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Component->Identifier = fpString;
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if ((MouseInfo->MouseSubtype != SERIAL_MOUSE) &&
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(MouseInfo->MouseSubtype != SERIAL_MOUSE_WITH_WHEEL)) {
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Controller->Child = PeripheralEntry;
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PeripheralEntry->Parent = Controller;
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if (MouseList) {
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//
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// Put the current mouse component to the beginning of the list
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//
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Controller->Sibling = MouseList;
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}
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return(Controller);
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} else {
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CurrentEntry = AdapterEntry->Child; // AdapterEntry MUST have child
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while (CurrentEntry) {
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if (CurrentEntry->ComponentEntry.Type == SerialController) {
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if (MouseInfo->MousePort == (USHORT)CurrentEntry->ComponentEntry.Key) {
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//
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// For serial mouse, the MousePort field contains
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// COM port number.
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//
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PeripheralEntry->Parent = CurrentEntry;
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CurrentEntry->Child = PeripheralEntry;
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break;
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}
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}
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CurrentEntry = CurrentEntry->Sibling;
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}
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return(NULL);
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}
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}
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FPFWCONFIGURATION_COMPONENT_DATA
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GetMouseInformation (
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VOID
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)
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/*++
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Routine Description:
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This routine is the entry for mouse detection routine. It will invoke
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lower level routines to detect ALL the mice in the system.
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Arguments:
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None.
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Returns:
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A pointer to a mouse component structure, if mouse/mice is detected.
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Otherwise a NULL pointer is returned.
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--*/
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{
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PMOUSE_INFORMATION MouseInfo;
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FPFWCONFIGURATION_COMPONENT_DATA MouseList = NULL;
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#if defined(_GAMBIT_)
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MouseInfo = (PMOUSE_INFORMATION)HwAllocateHeap (
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sizeof(MOUSE_INFORMATION), TRUE);
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MouseInfo->MouseType = 2; // Microsoft mouse
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MouseInfo->MouseSubtype = PS_MOUSE; // PS2 mouse
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MouseInfo->MousePort = 0; // Serial port 0
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MouseInfo->MouseIrq = 4; // Interrupt request vector was 3
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MouseList = SetMouseConfigurationData(MouseInfo, MouseList);
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return(MouseList);
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#else
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//
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// Check if there is a key in keyboard look ahead buffer. If yes and
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// we have not saved any, we will read it and remember it.
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//
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#if defined(NEC_98)
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if (MouseInfo = LookFor98BusMouse()) {
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MouseList = SetMouseConfigurationData(MouseInfo, MouseList);
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}
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if (MouseInfo = LookForSerialMouse()) {
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SetMouseConfigurationData(MouseInfo, MouseList);
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}
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#else
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if (SavedKey == 0) {
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SavedKey = HwGetKey();
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}
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if (MouseInfo = LookForPS2Mouse()) {
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MouseList = SetMouseConfigurationData(MouseInfo, MouseList);
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}
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if (MouseInfo = LookForInportMouse()) {
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MouseList = SetMouseConfigurationData(MouseInfo, MouseList);
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}
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while (MouseInfo = LookForSerialMouse()) {
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SetMouseConfigurationData(MouseInfo, MouseList);
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}
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if (MouseInfo = LookForBusMouse()) {
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MouseList = SetMouseConfigurationData(MouseInfo, MouseList);
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}
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//
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// Finally drain 8042 output buffer again before we leave
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//
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Empty8042();
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//
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// If we have a keystroke before the mouse/keyboard detection, we
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// needs to push the key back to the keyboard look ahead buffer such
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// that ntldr can read it.
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//
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if (SavedKey) {
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HwPushKey(SavedKey);
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}
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#endif
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#endif // _GAMBIT_
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return(MouseList);
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}
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#if defined(NEC_98) || defined(_GAMBIT_)
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#else
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BOOLEAN
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InportMouseIrqDetection(
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IN USHORT CurrentPort,
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OUT PUSHORT Vector
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)
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/*++
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Routine Description:
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This routine attempts to locate the interrupt vector for which
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the Inport mouse is configured. The allowable vectors are
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3, 4, 5, 7, and 9. If no interrupt vector is found, or more than
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one is found, the routine returns FALSE. Otherwise, TRUE is returned.
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Note that we diddle the i8259 interrupt controllers here.
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Arguments:
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CurrentPort - I/O port to use for the mouse.
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Vector - Pointer to the location to store the mouse interrupt vector.
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Return Value:
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Returns TRUE if the Inport interrupt vector was located; otherwise,
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FALSE is returned.
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--*/
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{
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UCHAR OldMasterMask, OldSlaveMask;
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UCHAR MasterMask, SlaveMask;
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UCHAR InterruptBits;
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UCHAR PossibleInterruptBits;
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int i;
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int NumberOfIRQs;
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BOOLEAN VectorFound = FALSE;
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//
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// Get the i8259 interrupt masks.
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//
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OldMasterMask = READ_PORT_UCHAR((PUCHAR) PIC1_PORT1);
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OldSlaveMask = READ_PORT_UCHAR((PUCHAR) PIC2_PORT1);
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//
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// Raise IRQL to the highest priority IRQL the inport would use.
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//
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WRITE_PORT_UCHAR(
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(PUCHAR) PIC1_PORT1,
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(UCHAR) 0xff ^ ((UCHAR)(1<<INPORT_LOWEST_IRQ) - 1)
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);
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WRITE_PORT_UCHAR(
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(PUCHAR) PIC2_PORT1,
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(UCHAR) 0xff
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);
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//
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// Get the master i8259 interrupt mask.
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//
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MasterMask = READ_PORT_UCHAR((PUCHAR) PIC1_PORT1);
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|
||
//
|
||
// Reset the Inport chip.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR((PUCHAR)CurrentPort, INPORT_RESET);
|
||
|
||
//
|
||
// Select the Inport mode register for use as the current data register.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR((PUCHAR)CurrentPort, INPORT_MODE_REGISTER);
|
||
|
||
//
|
||
// Disable potential Inport mouse interrupts.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR(
|
||
(PUCHAR) PIC1_PORT1,
|
||
(UCHAR) (MasterMask | MASTER_IRQ_MASK_BITS)
|
||
);
|
||
|
||
//
|
||
// Select the i8259 Interrupt Request Register.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR((PUCHAR) PIC1_PORT0, OCW3_READ_IRR);
|
||
|
||
//
|
||
// Attempt to locate the Inport interrupt line on the master i8259.
|
||
// Why try this 10 times? It's magic...
|
||
//
|
||
|
||
PossibleInterruptBits = MASTER_IRQ_MASK_BITS;
|
||
for (i = 0; i < 10; i++) {
|
||
|
||
//
|
||
// Generate a 0 on the Inport IRQ on the master i8259.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR(
|
||
(PUCHAR)(CurrentPort + INPORT_DATA_REGISTER_1),
|
||
INPORT_TIMER_INTERRUPT_ENABLE + INPORT_MODE_0
|
||
);
|
||
|
||
//
|
||
// Read the interrupt bits off the master i8259. Only bits
|
||
// 7, 5, 4, 3, and 2 are of interest. Eliminate non-functional
|
||
// IRQs. Only continue looking at the master i8259 if there
|
||
// is at least one functional IRQ.
|
||
//
|
||
|
||
InterruptBits = READ_PORT_UCHAR((PUCHAR) PIC1_PORT0);
|
||
InterruptBits &= MASTER_IRQ_MASK_BITS;
|
||
InterruptBits ^= MASTER_IRQ_MASK_BITS;
|
||
PossibleInterruptBits &= InterruptBits;
|
||
|
||
if (!PossibleInterruptBits)
|
||
break;
|
||
|
||
//
|
||
// Generate a 1 on the Inport IRQ on the master i8259.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR(
|
||
(PUCHAR)(CurrentPort + INPORT_DATA_REGISTER_1),
|
||
INPORT_TIMER_INTERRUPT_ENABLE + INPORT_MODE_1
|
||
);
|
||
|
||
//
|
||
// Read the interrupt bits off the master i8259. Only bits
|
||
// 7, 5, 4, 3, and 2 are of interest. Eliminate non-functional
|
||
// IRQs. Only continue looking at the master i8259 if there
|
||
// is at least one functional IRQ.
|
||
//
|
||
|
||
InterruptBits = READ_PORT_UCHAR((PUCHAR) PIC1_PORT0);
|
||
InterruptBits &= MASTER_IRQ_MASK_BITS;
|
||
PossibleInterruptBits &= InterruptBits;
|
||
|
||
if (!PossibleInterruptBits)
|
||
break;
|
||
}
|
||
|
||
if (PossibleInterruptBits) {
|
||
|
||
//
|
||
// We found at least one IRQ on the master i8259 that could belong
|
||
// to the Inport mouse. Count how many we found. If there is
|
||
// more than one, we haven't found the vector. Otherwise, we've
|
||
// successfully located the Inport interrupt vector on the master
|
||
// i8259 (provided the interrupt vector is 3, 4, 5, or 7).
|
||
//
|
||
|
||
PossibleInterruptBits >>= 3;
|
||
NumberOfIRQs = 0;
|
||
for (i = 3; i <= 7; i++) {
|
||
if (PossibleInterruptBits & 1) {
|
||
NumberOfIRQs += 1;
|
||
*Vector = (CCHAR) i;
|
||
}
|
||
PossibleInterruptBits >>= 1;
|
||
}
|
||
if (NumberOfIRQs == 1) {
|
||
VectorFound = TRUE;
|
||
} else {
|
||
*Vector = 0xffff;
|
||
}
|
||
}
|
||
|
||
//
|
||
// If we didn't locate the interrupt vector on the master i8259, attempt
|
||
// to locate it on the slave i8259.
|
||
//
|
||
|
||
if (!VectorFound) {
|
||
|
||
//
|
||
// Get the slave i8259 interrupt mask.
|
||
//
|
||
|
||
SlaveMask = READ_PORT_UCHAR((PUCHAR) PIC2_PORT1);
|
||
|
||
//
|
||
// Disable potential Inport mouse interrupts.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR(
|
||
(PUCHAR) PIC2_PORT1,
|
||
(UCHAR) (SlaveMask | SLAVE_IRQ_MASK_BITS)
|
||
);
|
||
|
||
//
|
||
// Select the i8259 Interrupt Request Register.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR((PUCHAR) PIC2_PORT0, OCW3_READ_IRR);
|
||
|
||
//
|
||
// Attempt to locate the Inport interrupt line on the slave i8259.
|
||
// Why try this 10 times? It's magic...
|
||
//
|
||
|
||
PossibleInterruptBits = SLAVE_IRQ_MASK_BITS;
|
||
for (i = 0; i < 10; i++) {
|
||
|
||
//
|
||
// Generate a 0 on the Inport IRQ on the slave i8259.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR(
|
||
(PUCHAR)(CurrentPort + INPORT_DATA_REGISTER_1),
|
||
INPORT_TIMER_INTERRUPT_ENABLE + INPORT_MODE_0
|
||
);
|
||
|
||
//
|
||
// Read the interrupt bits off the slave i8259. Only bit 2
|
||
// is of interest. Eliminate non-functional IRQs. Only continue
|
||
// looking at the slave i8259 if there is at least one
|
||
// functional IRQ.
|
||
//
|
||
|
||
InterruptBits = READ_PORT_UCHAR((PUCHAR) PIC2_PORT0);
|
||
InterruptBits &= SLAVE_IRQ_MASK_BITS;
|
||
InterruptBits ^= SLAVE_IRQ_MASK_BITS;
|
||
PossibleInterruptBits &= InterruptBits;
|
||
|
||
if (!PossibleInterruptBits)
|
||
break;
|
||
|
||
//
|
||
// Generate a 1 on the Inport IRQ on the slave i8259.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR(
|
||
(PUCHAR)(CurrentPort + INPORT_DATA_REGISTER_1),
|
||
INPORT_TIMER_INTERRUPT_ENABLE + INPORT_MODE_1
|
||
);
|
||
|
||
//
|
||
// Read the interrupt bits off the slave i8259. Only bit 2
|
||
// is of interest. Eliminate non-functional IRQs. Only continue
|
||
// looking at the slave i8259 if there is at least one
|
||
// functional IRQ.
|
||
//
|
||
|
||
InterruptBits = READ_PORT_UCHAR((PUCHAR) PIC2_PORT0);
|
||
InterruptBits &= SLAVE_IRQ_MASK_BITS;
|
||
PossibleInterruptBits &= InterruptBits;
|
||
|
||
if (!PossibleInterruptBits)
|
||
break;
|
||
|
||
}
|
||
|
||
//
|
||
// We may have found the Inport IRQ. If it's not 2 on slave (really
|
||
// 9, overall) then we have NOT found the Inport interrupt vector.
|
||
// Otherwise, we have successfully located the Inport vector on
|
||
// the slave i8259.
|
||
//
|
||
|
||
if (PossibleInterruptBits == 2) {
|
||
*Vector = 9;
|
||
VectorFound = TRUE;
|
||
} else {
|
||
*Vector = 0xffff;
|
||
}
|
||
|
||
//
|
||
// Restore the i8259 slave.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR((PUCHAR) PIC2_PORT0, OCW3_READ_ISR);
|
||
|
||
//
|
||
// Restore the i8259 slave interrupt mask.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR((PUCHAR) PIC2_PORT1, SlaveMask);
|
||
}
|
||
|
||
//
|
||
// Tri-state the Inport IRQ line.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR((PUCHAR) (CurrentPort + INPORT_DATA_REGISTER_1), 0);
|
||
|
||
//
|
||
// Restore the i8259 master.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR((PUCHAR) PIC1_PORT0, OCW3_READ_ISR);
|
||
|
||
//
|
||
// Restore the i8259 master interrupt mask.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR((PUCHAR) PIC1_PORT1, MasterMask);
|
||
|
||
//
|
||
// Restore the previous IRQL.
|
||
//
|
||
|
||
WRITE_PORT_UCHAR(
|
||
(PUCHAR) PIC1_PORT1,
|
||
OldMasterMask
|
||
);
|
||
|
||
WRITE_PORT_UCHAR(
|
||
(PUCHAR) PIC2_PORT1,
|
||
OldSlaveMask
|
||
);
|
||
|
||
return(VectorFound);
|
||
}
|
||
#endif
|
||
|