pnpi8042，windows下驱动源码

/*++ Copyright (c) 1990-1998 Microsoft Corporation, All Rights Reserved Module Name: moudep.c Abstract: The initialization and hardware-dependent portions of the Intel i8042 port driver which are specific to the auxiliary (PS/2 mouse) device. Environment: Kernel mode only. Notes: NOTES: (Future/outstanding issues) - Powerfail not implemented. - Consolidate duplicate code, where possible and appropriate. Revision History: --*/ #include "stdarg.h" #include "stdio.h" #include "string.h" #include "i8042prt.h" #include "i8042log.h" // // Use the alloc_text pragma to specify the driver initialization routines // (they can be paged out). // #ifdef ALLOC_PRAGMA #pragma alloc_text(PAGE, I8xMouseConfiguration) #pragma alloc_text(PAGE, I8xMouseServiceParameters) #pragma alloc_text(PAGE, I8xInitializeMouse) #pragma alloc_text(PAGE, I8xGetBytePolledIterated) #pragma alloc_text(PAGE, I8xTransmitByteSequence) #pragma alloc_text(PAGE, I8xFindWheelMouse) #pragma alloc_text(PAGE, I8xQueryNumberOfMouseButtons) #pragma alloc_text(PAGE, MouseCopyWheelIDs) // // These will be locked down right before the mouse interrupt is enabled if a // mouse is present // #pragma alloc_text(PAGEMOUC, I8042MouseInterruptService) #pragma alloc_text(PAGEMOUC, I8xQueueCurrentMouseInput) #pragma alloc_text(PAGEMOUC, I8xVerifyMousePnPID) #endif #define ONE_PAST_FINAL_SAMPLE ((UCHAR) 0x00) static const UCHAR PnpDetectCommands[] = { 20, 40, 60, ONE_PAST_FINAL_SAMPLE }; static const UCHAR WheelEnableCommands[] = { 200, 100, 80, ONE_PAST_FINAL_SAMPLE }; static const UCHAR FiveButtonEnableCommands[] = { 200, 200, 80, ONE_PAST_FINAL_SAMPLE }; #if MOUSE_RECORD_ISR PMOUSE_STATE_RECORD IsrStateHistory = NULL; PMOUSE_STATE_RECORD CurrentIsrState = NULL; PMOUSE_STATE_RECORD IsrStateHistoryEnd = NULL; #endif // MOUSE_RECORD_ISR #define BUFFER_FULL (OUTPUT_BUFFER_FULL | MOUSE_OUTPUT_BUFFER_FULL) #define RML_BUTTONS (RIGHT_BUTTON | MIDDLE_BUTTON | LEFT_BUTTON) #define BUTTONS_4_5 (BUTTON_4 | BUTTON_5) #define _TRANSITION_DOWN(previous, current, button) \ ((!(previous & button)) && (current & button)) #define _TRANSITION_UP(previous, current, button) \ ((previous & button) && (!(current & button))) BOOLEAN I8042MouseInterruptService( IN PKINTERRUPT Interrupt, IN PDEVICE_OBJECT DeviceObject ) /*++ Routine Description: This routine performs the actual work. It either processes a mouse packet or the results from a write to the device. Arguments: CallIsrContext - Contains the interrupt object and device object. Return Value: TRUE if the interrupt was truly ours --*/ { PPORT_MOUSE_EXTENSION deviceExtension; LARGE_INTEGER tickDelta, newTick; UCHAR previousButtons; UCHAR previousSignAndOverflow; UCHAR byte, statusByte, lastByte; UCHAR resendCommand, nextCommand, altCommand; BOOLEAN bSendCommand, ret = TRUE; static PWCHAR currentIdChar; #define TRANSITION_UP(button) _TRANSITION_UP(previousButtons, byte, button) #define TRANSITION_DOWN(button) _TRANSITION_DOWN(previousButtons, byte, button) IsrPrint(DBG_MOUISR_TRACE, ("%s\n", pEnter)); deviceExtension = (PPORT_MOUSE_EXTENSION) DeviceObject->DeviceExtension; if (deviceExtension->PowerState != PowerDeviceD0) { return FALSE; } // // Verify that this device really interrupted. Check the status // register. The Output Buffer Full bit should be set, and the // Auxiliary Device Output Buffer Full bit should be set. // statusByte = I8X_GET_STATUS_BYTE(Globals.ControllerData->DeviceRegisters[CommandPort]); if ((statusByte & BUFFER_FULL) != BUFFER_FULL) { // // Stall and then try again. The Olivetti MIPS machine // sometimes gets a mouse interrupt before the status // register is set. // KeStallExecutionProcessor(10); statusByte = I8X_GET_STATUS_BYTE(Globals.ControllerData->DeviceRegisters[CommandPort]); if ((statusByte & BUFFER_FULL) != BUFFER_FULL) { // // Not our interrupt. // IsrPrint(DBG_MOUISR_ERROR | DBG_MOUISR_INFO, ("not our interrupt!\n" )); return FALSE; } } // // Read the byte from the i8042 data port. // I8xGetByteAsynchronous( (CCHAR) MouseDeviceType, &byte ); IsrPrint(DBG_MOUISR_BYTE, ("byte 0x%x\n", byte)); KeQueryTickCount(&newTick); if (deviceExtension->InputResetSubState == QueueingMouseReset) { RECORD_ISR_STATE(deviceExtension, byte, deviceExtension->LastByteReceived, newTick); return TRUE; } if (deviceExtension->InputState == MouseResetting && byte == FAILURE) { RECORD_ISR_STATE(deviceExtension, byte, deviceExtension->LastByteReceived, newTick); deviceExtension->LastByteReceived = byte; ret = TRUE; goto IsrResetMouse; } if (deviceExtension->IsrHookCallback) { BOOLEAN cont= FALSE; ret = (*deviceExtension->IsrHookCallback)( deviceExtension->HookContext, &deviceExtension->CurrentInput, &deviceExtension->CurrentOutput, statusByte, &byte, &cont, &deviceExtension->InputState, &deviceExtension->InputResetSubState ); if (!cont) { return ret; } } // // Watch the data stream for a reset completion (0xaa) followed by the // device id // // this pattern can appear as part of a normal data packet as well. This // code assumes that sending an enable to an already enabled mouse will: // * not hang the mouse // * abort the current packet and return an ACK. // if (deviceExtension->LastByteReceived == MOUSE_COMPLETE && (byte == 0x00 || byte == 0x03)) { IsrPrint(DBG_MOUISR_RESETTING, ("received id %2d\n", byte)); RECORD_ISR_STATE(deviceExtension, byte, deviceExtension->LastByteReceived, newTick); if (InterlockedCompareExchangePointer(&deviceExtension->ResetIrp, NULL, NULL) == NULL) { // // user unplugged and plugged in the mouse...queue a reset packet // so the programming of the mouse in the ISR does not conflict with // any other writes to the i8042prt controller // IsrPrint(DBG_MOUISR_RESETTING, ("user initiated reset...queueing\n")); goto IsrResetMouseOnly; } // // Tell the 8042 port to fetch the device ID of the aux device // We do this async so that we don't spin at IRQ1!!! // I8X_WRITE_CMD_TO_MOUSE(); I8X_MOUSE_COMMAND( GET_DEVICE_ID ); RECORD_ISR_STATE_COMMAND(deviceExtension, GET_DEVICE_ID); // // This