mirror of https://github.com/acidanthera/audk.git
922 lines
21 KiB
C
922 lines
21 KiB
C
/** @file
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PS2 Mouse Communication Interface.
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Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "Ps2Mouse.h"
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#include "CommPs2.h"
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UINT8 SampleRateTbl[MaxSampleRate] = { 0xa, 0x14, 0x28, 0x3c, 0x50, 0x64, 0xc8 };
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UINT8 ResolutionTbl[MaxResolution] = { 0, 1, 2, 3 };
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/**
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Issue self test command via IsaIo interface.
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
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@return EFI_SUCCESS Success to do keyboard self testing.
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@return others Fail to do keyboard self testing.
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**/
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EFI_STATUS
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KbcSelfTest (
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IN EFI_ISA_IO_PROTOCOL *IsaIo
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)
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{
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EFI_STATUS Status;
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UINT8 Data;
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//
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// Keyboard controller self test
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//
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Status = Out8042Command (IsaIo, SELF_TEST);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// Read return code
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//
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Status = In8042Data (IsaIo, &Data);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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if (Data != 0x55) {
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return EFI_DEVICE_ERROR;
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}
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//
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// Set system flag
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//
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Status = Out8042Command (IsaIo, READ_CMD_BYTE);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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Status = In8042Data (IsaIo, &Data);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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Status = Out8042Command (IsaIo, WRITE_CMD_BYTE);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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Data |= CMD_SYS_FLAG;
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Status = Out8042Data (IsaIo, Data);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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return EFI_SUCCESS;
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}
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/**
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Issue command to enable keyboard AUX functionality.
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
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@return Status of command issuing.
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**/
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EFI_STATUS
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KbcEnableAux (
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IN EFI_ISA_IO_PROTOCOL *IsaIo
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)
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{
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//
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// Send 8042 enable mouse command
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//
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return Out8042Command (IsaIo, ENABLE_AUX);
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}
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/**
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Issue command to disable keyboard AUX functionality.
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
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@return Status of command issuing.
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**/
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EFI_STATUS
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KbcDisableAux (
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IN EFI_ISA_IO_PROTOCOL *IsaIo
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)
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{
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//
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// Send 8042 disable mouse command
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//
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return Out8042Command (IsaIo, DISABLE_AUX);
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}
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/**
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Issue command to enable keyboard.
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
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@return Status of command issuing.
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**/
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EFI_STATUS
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KbcEnableKb (
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IN EFI_ISA_IO_PROTOCOL *IsaIo
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)
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{
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//
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// Send 8042 enable keyboard command
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//
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return Out8042Command (IsaIo, ENABLE_KB);
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}
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/**
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Issue command to disable keyboard.
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
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@return Status of command issuing.
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**/
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EFI_STATUS
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KbcDisableKb (
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IN EFI_ISA_IO_PROTOCOL *IsaIo
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)
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{
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//
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// Send 8042 disable keyboard command
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//
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return Out8042Command (IsaIo, DISABLE_KB);
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}
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/**
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Issue command to check keyboard status.
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
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@param KeyboardEnable return whether keyboard is enable.
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@return Status of command issuing.
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**/
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EFI_STATUS
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CheckKbStatus (
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IN EFI_ISA_IO_PROTOCOL *IsaIo,
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OUT BOOLEAN *KeyboardEnable
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)
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{
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EFI_STATUS Status;
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UINT8 Data;
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//
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// Send command to read KBC command byte
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//
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Status = Out8042Command (IsaIo, READ_CMD_BYTE);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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Status = In8042Data (IsaIo, &Data);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// Check keyboard enable or not
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//
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if ((Data & CMD_KB_STS) == CMD_KB_DIS) {
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*KeyboardEnable = FALSE;
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} else {
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*KeyboardEnable = TRUE;
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}
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return EFI_SUCCESS;
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}
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/**
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Issue command to reset keyboard.
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
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@return Status of command issuing.
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**/
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EFI_STATUS
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PS2MouseReset (
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IN EFI_ISA_IO_PROTOCOL *IsaIo
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)
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{
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EFI_STATUS Status;
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UINT8 Data;
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Status = Out8042AuxCommand (IsaIo, RESET_CMD, FALSE);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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Status = In8042AuxData (IsaIo, &Data);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// Check BAT Complete Code
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//
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if (Data != PS2MOUSE_BAT1) {
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return EFI_DEVICE_ERROR;
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}
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Status = In8042AuxData (IsaIo, &Data);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// Check BAT Complete Code
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//
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if (Data != PS2MOUSE_BAT2) {
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return EFI_DEVICE_ERROR;
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}
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return EFI_SUCCESS;
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}
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/**
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Issue command to set mouse's sample rate
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
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@param SampleRate value of sample rate
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@return Status of command issuing.
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**/
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EFI_STATUS
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PS2MouseSetSampleRate (
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IN EFI_ISA_IO_PROTOCOL *IsaIo,
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IN MOUSE_SR SampleRate
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)
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{
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EFI_STATUS Status;
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//
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// Send auxiliary command to set mouse sample rate
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//
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Status = Out8042AuxCommand (IsaIo, SETSR_CMD, FALSE);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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Status = Out8042AuxData (IsaIo, SampleRateTbl[SampleRate]);
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return Status;
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}
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/**
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Issue command to set mouse's resolution.
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
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@param Resolution value of resolution
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@return Status of command issuing.
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**/
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EFI_STATUS
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PS2MouseSetResolution (
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IN EFI_ISA_IO_PROTOCOL *IsaIo,
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IN MOUSE_RE Resolution
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)
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{
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EFI_STATUS Status;
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//
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// Send auxiliary command to set mouse resolution
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//
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Status = Out8042AuxCommand (IsaIo, SETRE_CMD, FALSE);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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Status = Out8042AuxData (IsaIo, ResolutionTbl[Resolution]);
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return Status;
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}
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/**
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Issue command to set mouse's scaling.
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
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@param Scaling value of scaling
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@return Status of command issuing.
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**/
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EFI_STATUS
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PS2MouseSetScaling (
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IN EFI_ISA_IO_PROTOCOL *IsaIo,
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IN MOUSE_SF Scaling
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)
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{
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UINT8 Command;
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Command = (UINT8) (Scaling == Scaling1 ? SETSF1_CMD : SETSF2_CMD);
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//
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// Send auxiliary command to set mouse scaling data
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//
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return Out8042AuxCommand (IsaIo, Command, FALSE);
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}
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/**
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Issue command to enable Ps2 mouse.
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
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@return Status of command issuing.
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**/
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EFI_STATUS
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PS2MouseEnable (
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IN EFI_ISA_IO_PROTOCOL *IsaIo
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)
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{
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//
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// Send auxiliary command to enable mouse
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//
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return Out8042AuxCommand (IsaIo, ENABLE_CMD, FALSE);
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}
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/**
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Get mouse packet . Only care first 3 bytes
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@param MouseDev Pointer of PS2 Mouse Private Data Structure
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@retval EFI_NOT_READY Mouse Device not ready to input data packet, or some error happened during getting the packet
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@retval EFI_SUCCESS The data packet is gotten successfully.
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**/
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EFI_STATUS
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PS2MouseGetPacket (
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PS2_MOUSE_DEV *MouseDev
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)
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{
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EFI_STATUS Status;
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BOOLEAN KeyboardEnable;
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UINT8 Packet[PS2_PACKET_LENGTH];
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UINT8 Data;
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UINTN Count;
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UINTN State;
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INT16 RelativeMovementX;
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INT16 RelativeMovementY;
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BOOLEAN LButton;
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BOOLEAN RButton;
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KeyboardEnable = FALSE;
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Count = 1;
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State = PS2_READ_BYTE_ONE;
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//
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// State machine to get mouse packet
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//
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while (1) {
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switch (State) {
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case PS2_READ_BYTE_ONE:
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//
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// Read mouse first byte data, if failed, immediately return
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//
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KbcDisableAux (MouseDev->IsaIo);
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Status = PS2MouseRead (MouseDev->IsaIo, &Data, &Count, State);
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if (EFI_ERROR (Status)) {
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KbcEnableAux (MouseDev->IsaIo);
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return EFI_NOT_READY;
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}
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if (Count != 1) {
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KbcEnableAux (MouseDev->IsaIo);
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return EFI_NOT_READY;
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}
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if (IS_PS2_SYNC_BYTE (Data)) {
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Packet[0] = Data;
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State = PS2_READ_DATA_BYTE;
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CheckKbStatus (MouseDev->IsaIo, &KeyboardEnable);
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KbcDisableKb (MouseDev->IsaIo);
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KbcEnableAux (MouseDev->IsaIo);
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}
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break;
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case PS2_READ_DATA_BYTE:
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Count = 2;
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Status = PS2MouseRead (MouseDev->IsaIo, (Packet + 1), &Count, State);
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if (EFI_ERROR (Status)) {
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if (KeyboardEnable) {
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KbcEnableKb (MouseDev->IsaIo);
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}
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return EFI_NOT_READY;
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}
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if (Count != 2) {
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if (KeyboardEnable) {
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KbcEnableKb (MouseDev->IsaIo);
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}
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return EFI_NOT_READY;
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}
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State = PS2_PROCESS_PACKET;
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break;
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case PS2_PROCESS_PACKET:
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if (KeyboardEnable) {
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KbcEnableKb (MouseDev->IsaIo);
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}
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//
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// Decode the packet
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//
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RelativeMovementX = Packet[1];
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RelativeMovementY = Packet[2];
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//
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// Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0
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// Byte 0 | Y overflow | X overflow | Y sign bit | X sign bit | Always 1 | Middle Btn | Right Btn | Left Btn
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// Byte 1 | 8 bit X Movement
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// Byte 2 | 8 bit Y Movement
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//
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// X sign bit + 8 bit X Movement : 9-bit signed twos complement integer that presents the relative displacement of the device in the X direction since the last data transmission.
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// Y sign bit + 8 bit Y Movement : Same as X sign bit + 8 bit X Movement.
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//
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//
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// First, Clear X and Y high 8 bits
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//
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RelativeMovementX = (INT16) (RelativeMovementX & 0xFF);
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RelativeMovementY = (INT16) (RelativeMovementY & 0xFF);
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//
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// Second, if the 9-bit signed twos complement integer is negative, set the high 8 bit 0xff
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//
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if ((Packet[0] & 0x10) != 0) {
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RelativeMovementX = (INT16) (RelativeMovementX | 0xFF00);
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}
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if ((Packet[0] & 0x20) != 0) {
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RelativeMovementY = (INT16) (RelativeMovementY | 0xFF00);
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}
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RButton = (UINT8) (Packet[0] & 0x2);
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LButton = (UINT8) (Packet[0] & 0x1);
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//
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// Update mouse state
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//
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MouseDev->State.RelativeMovementX += RelativeMovementX;
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MouseDev->State.RelativeMovementY -= RelativeMovementY;
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MouseDev->State.RightButton = (UINT8) (RButton ? TRUE : FALSE);
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MouseDev->State.LeftButton = (UINT8) (LButton ? TRUE : FALSE);
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MouseDev->StateChanged = TRUE;
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return EFI_SUCCESS;
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}
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}
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}
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/**
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Read data via IsaIo protocol with given number.
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
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@param Buffer Buffer receive data of mouse
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@param BufSize The size of buffer
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@param State Check input or read data
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@return status of reading mouse data.
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**/
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EFI_STATUS
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PS2MouseRead (
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IN EFI_ISA_IO_PROTOCOL *IsaIo,
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OUT VOID *Buffer,
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IN OUT UINTN *BufSize,
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IN UINTN State
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)
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{
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EFI_STATUS Status;
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UINTN BytesRead;
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Status = EFI_SUCCESS;
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BytesRead = 0;
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if (State == PS2_READ_BYTE_ONE) {
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//
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// Check input for mouse
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//
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Status = CheckForInput (IsaIo);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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}
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while (BytesRead < *BufSize) {
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Status = WaitOutputFull (IsaIo, TIMEOUT);
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if (EFI_ERROR (Status)) {
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break;
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}
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IsaIo->Io.Read (IsaIo, EfiIsaIoWidthUint8, KBC_DATA_PORT, 1, Buffer);
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BytesRead++;
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Buffer = (UINT8 *) Buffer + 1;
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}
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//
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// Verify the correct number of bytes read
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//
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if (BytesRead == 0 || BytesRead != *BufSize) {
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Status = EFI_NOT_FOUND;
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}
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*BufSize = BytesRead;
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return Status;
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}
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//
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// 8042 I/O function
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//
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/**
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I/O work flow of outing 8042 command.
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
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@param Command I/O command.
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@retval EFI_SUCCESS Success to execute I/O work flow
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@retval EFI_TIMEOUT Keyboard controller time out.
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**/
|
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EFI_STATUS
|
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Out8042Command (
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IN EFI_ISA_IO_PROTOCOL *IsaIo,
|
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IN UINT8 Command
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)
|
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{
|
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EFI_STATUS Status;
|
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UINT8 Data;
|
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|
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//
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// Wait keyboard controller input buffer empty
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//
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Status = WaitInputEmpty (IsaIo, TIMEOUT);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// Send command
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//
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Data = Command;
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IsaIo->Io.Write (IsaIo, EfiIsaIoWidthUint8, KBC_CMD_STS_PORT, 1, &Data);
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Status = WaitInputEmpty (IsaIo, TIMEOUT);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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return EFI_SUCCESS;
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}
|
|
|
|
/**
|
|
I/O work flow of outing 8042 data.
|
|
|
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@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
|
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@param Data Data value
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|
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@retval EFI_SUCCESS Success to execute I/O work flow
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@retval EFI_TIMEOUT Keyboard controller time out.
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|
**/
|
|
EFI_STATUS
|
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Out8042Data (
|
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IN EFI_ISA_IO_PROTOCOL *IsaIo,
|
|
IN UINT8 Data
|
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)
|
|
{
|
|
EFI_STATUS Status;
|
|
UINT8 Temp;
|
|
//
|
|
// Wait keyboard controller input buffer empty
|
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//
|
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Status = WaitInputEmpty (IsaIo, TIMEOUT);
|
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if (EFI_ERROR (Status)) {
|
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return Status;
|
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}
|
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|
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Temp = Data;
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IsaIo->Io.Write (IsaIo, EfiIsaIoWidthUint8, KBC_DATA_PORT, 1, &Temp);
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|
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Status = WaitInputEmpty (IsaIo, TIMEOUT);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
I/O work flow of in 8042 data.
|
|
|
|
@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
|
|
@param Data Data value
|
|
|
|
@retval EFI_SUCCESS Success to execute I/O work flow
|
|
@retval EFI_TIMEOUT Keyboard controller time out.
|
|
**/
|
|
EFI_STATUS
|
|
In8042Data (
|
|
IN EFI_ISA_IO_PROTOCOL *IsaIo,
|
|
IN OUT UINT8 *Data
|
|
)
|
|
{
|
|
UINTN Delay;
|
|
UINT8 Temp;
|
|
|
|
Delay = TIMEOUT / 50;
|
|
|
|
do {
|
|
IsaIo->Io.Read (IsaIo, EfiIsaIoWidthUint8, KBC_CMD_STS_PORT, 1, &Temp);
|
|
|
|
//
|
|
// Check keyboard controller status bit 0(output buffer status)
|
|
//
|
|
if ((Temp & KBC_OUTB) == KBC_OUTB) {
|
|
break;
|
|
}
|
|
|
|
gBS->Stall (50);
|
|
Delay--;
|
|
} while (Delay != 0);
|
|
|
|
if (Delay == 0) {
|
|
return EFI_TIMEOUT;
|
|
}
|
|
|
|
IsaIo->Io.Read (IsaIo, EfiIsaIoWidthUint8, KBC_DATA_PORT, 1, Data);
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
I/O work flow of outing 8042 Aux command.
|
|
|
|
@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
|
|
@param Command Aux I/O command
|
|
@param Resend Whether need resend the Aux command.
|
|
|
|
@retval EFI_SUCCESS Success to execute I/O work flow
|
|
@retval EFI_TIMEOUT Keyboard controller time out.
|
|
**/
|
|
EFI_STATUS
|
|
Out8042AuxCommand (
|
|
IN EFI_ISA_IO_PROTOCOL *IsaIo,
|
|
IN UINT8 Command,
|
|
IN BOOLEAN Resend
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
UINT8 Data;
|
|
|
|
//
|
|
// Wait keyboard controller input buffer empty
|
|
//
|
|
Status = WaitInputEmpty (IsaIo, TIMEOUT);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
//
|
|
// Send write to auxiliary device command
|
|
//
|
|
Data = WRITE_AUX_DEV;
|
|
IsaIo->Io.Write (IsaIo, EfiIsaIoWidthUint8, KBC_CMD_STS_PORT, 1, &Data);
|
|
|
|
Status = WaitInputEmpty (IsaIo, TIMEOUT);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
//
|
|
// Send auxiliary device command
|
|
//
|
|
IsaIo->Io.Write (IsaIo, EfiIsaIoWidthUint8, KBC_DATA_PORT, 1, &Command);
|
|
|
|
//
|
|
// Read return code
|
|
//
|
|
Status = In8042AuxData (IsaIo, &Data);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
if (Data == PS2_ACK) {
|
|
//
|
|
// Receive mouse acknowledge, command send success
|
|
//
|
|
return EFI_SUCCESS;
|
|
|
|
} else if (Resend) {
|
|
//
|
|
// Resend fail
|
|
//
|
|
return EFI_DEVICE_ERROR;
|
|
|
|
} else if (Data == PS2_RESEND) {
|
|
//
|
|
// Resend command
|
|
//
|
|
Status = Out8042AuxCommand (IsaIo, Command, TRUE);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
} else {
|
|
//
|
|
// Invalid return code
|
|
//
|
|
return EFI_DEVICE_ERROR;
|
|
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
I/O work flow of outing 8042 Aux data.
|
|
|
|
@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
|
|
@param Data Buffer holding return value
|
|
|
|
@retval EFI_SUCCESS Success to execute I/O work flow
|
|
@retval EFI_TIMEOUT Keyboard controller time out.
|
|
**/
|
|
EFI_STATUS
|
|
Out8042AuxData (
|
|
IN EFI_ISA_IO_PROTOCOL *IsaIo,
|
|
IN UINT8 Data
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
UINT8 Temp;
|
|
//
|
|
// Wait keyboard controller input buffer empty
|
|
//
|
|
Status = WaitInputEmpty (IsaIo, TIMEOUT);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
//
|
|
// Send write to auxiliary device command
|
|
//
|
|
Temp = WRITE_AUX_DEV;
|
|
IsaIo->Io.Write (IsaIo, EfiIsaIoWidthUint8, KBC_CMD_STS_PORT, 1, &Temp);
|
|
|
|
Status = WaitInputEmpty (IsaIo, TIMEOUT);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Temp = Data;
|
|
IsaIo->Io.Write (IsaIo, EfiIsaIoWidthUint8, KBC_DATA_PORT, 1, &Temp);
|
|
|
|
Status = WaitInputEmpty (IsaIo, TIMEOUT);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
I/O work flow of in 8042 Aux data.
|
|
|
|
@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
|
|
@param Data Buffer holding return value.
|
|
|
|
@retval EFI_SUCCESS Success to execute I/O work flow
|
|
@retval EFI_TIMEOUT Keyboard controller time out.
|
|
**/
|
|
EFI_STATUS
|
|
In8042AuxData (
|
|
IN EFI_ISA_IO_PROTOCOL *IsaIo,
|
|
IN OUT UINT8 *Data
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
//
|
|
// wait for output data
|
|
//
|
|
Status = WaitOutputFull (IsaIo, BAT_TIMEOUT);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
IsaIo->Io.Read (IsaIo, EfiIsaIoWidthUint8, KBC_DATA_PORT, 1, Data);
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
Check keyboard controller status, if it is output buffer full and for auxiliary device.
|
|
|
|
@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
|
|
|
|
@retval EFI_SUCCESS Keyboard controller is ready
|
|
@retval EFI_NOT_READY Keyboard controller is not ready
|
|
**/
|
|
EFI_STATUS
|
|
CheckForInput (
|
|
IN EFI_ISA_IO_PROTOCOL *IsaIo
|
|
)
|
|
{
|
|
UINT8 Data;
|
|
|
|
IsaIo->Io.Read (IsaIo, EfiIsaIoWidthUint8, KBC_CMD_STS_PORT, 1, &Data);
|
|
|
|
//
|
|
// Check keyboard controller status, if it is output buffer full and for auxiliary device
|
|
//
|
|
if ((Data & (KBC_OUTB | KBC_AUXB)) != (KBC_OUTB | KBC_AUXB)) {
|
|
return EFI_NOT_READY;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
I/O work flow to wait input buffer empty in given time.
|
|
|
|
@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
|
|
@param Timeout Wating time.
|
|
|
|
@retval EFI_TIMEOUT if input is still not empty in given time.
|
|
@retval EFI_SUCCESS input is empty.
|
|
**/
|
|
EFI_STATUS
|
|
WaitInputEmpty (
|
|
IN EFI_ISA_IO_PROTOCOL *IsaIo,
|
|
IN UINTN Timeout
|
|
)
|
|
{
|
|
UINTN Delay;
|
|
UINT8 Data;
|
|
|
|
Delay = Timeout / 50;
|
|
|
|
do {
|
|
IsaIo->Io.Read (IsaIo, EfiIsaIoWidthUint8, KBC_CMD_STS_PORT, 1, &Data);
|
|
|
|
//
|
|
// Check keyboard controller status bit 1(input buffer status)
|
|
//
|
|
if ((Data & KBC_INPB) == 0) {
|
|
break;
|
|
}
|
|
|
|
gBS->Stall (50);
|
|
Delay--;
|
|
} while (Delay != 0);
|
|
|
|
if (Delay == 0) {
|
|
return EFI_TIMEOUT;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
I/O work flow to wait output buffer full in given time.
|
|
|
|
@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
|
|
@param Timeout given time
|
|
|
|
@retval EFI_TIMEOUT output is not full in given time
|
|
@retval EFI_SUCCESS output is full in given time.
|
|
**/
|
|
EFI_STATUS
|
|
WaitOutputFull (
|
|
IN EFI_ISA_IO_PROTOCOL *IsaIo,
|
|
IN UINTN Timeout
|
|
)
|
|
{
|
|
UINTN Delay;
|
|
UINT8 Data;
|
|
|
|
Delay = Timeout / 50;
|
|
|
|
do {
|
|
IsaIo->Io.Read (IsaIo, EfiIsaIoWidthUint8, KBC_CMD_STS_PORT, 1, &Data);
|
|
|
|
//
|
|
// Check keyboard controller status bit 0(output buffer status)
|
|
// & bit5(output buffer for auxiliary device)
|
|
//
|
|
if ((Data & (KBC_OUTB | KBC_AUXB)) == (KBC_OUTB | KBC_AUXB)) {
|
|
break;
|
|
}
|
|
|
|
gBS->Stall (50);
|
|
Delay--;
|
|
} while (Delay != 0);
|
|
|
|
if (Delay == 0) {
|
|
return EFI_TIMEOUT;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|