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/** @file
Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that accompanies this distribution.
The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
LegacySpeaker.c
Abstract:
This file implements DXE for Legacy Speaker.
--*/
#include "LegacySpeaker.h"
/**
This function will enable the speaker to generate beep
@retval EFI_STATUS
**/
EFI_STATUS
TurnOnSpeaker (
)
{
UINT8 Data;
Data = IoRead8 (EFI_SPEAKER_CONTROL_PORT);
Data |= 0x03;
IoWrite8(EFI_SPEAKER_CONTROL_PORT, Data);
return EFI_SUCCESS;
}
/**
This function will stop beep from speaker.
@retval Status
**/
EFI_STATUS
TurnOffSpeaker (
)
{
UINT8 Data;
Data = IoRead8 (EFI_SPEAKER_CONTROL_PORT);
Data &= 0xFC;
IoWrite8(EFI_SPEAKER_CONTROL_PORT, Data);
return EFI_SUCCESS;
}
/**
Generate beep sound based upon number of beeps and duration of the beep
@param NumberOfBeeps Number of beeps which user want to produce
@param BeepDuration Duration for speaker gate need to be enabled
@param TimeInterval Interval between each beep
@retval Does not return if the reset takes place.
EFI_INVALID_PARAMETER If ResetType is invalid.
**/
EFI_STATUS
OutputBeep (
IN UINTN NumberOfBeep,
IN UINTN BeepDuration,
IN UINTN TimeInterval
)
{
UINTN Num;
for (Num=0; Num < NumberOfBeep; Num++) {
TurnOnSpeaker ();
//
// wait some time,at least 120us
//
gBS->Stall (BeepDuration);
TurnOffSpeaker();
gBS->Stall (TimeInterval);
}
return EFI_SUCCESS;
}
/**
This function will program the speaker tone frequency. The value should be with 64k
boundary since it takes only 16 bit value which gets programmed in two step IO opearattion
@param Frequency A value which should be 16 bit only.
@retval EFI_SUCESS
**/
EFI_STATUS
EFIAPI
ProgramToneFrequency (
IN EFI_SPEAKER_IF_PROTOCOL * This,
IN UINT16 Frequency
)
{
UINT8 Data;
Data = 0xB6;
IoWrite8(EFI_TIMER_CONTROL_PORT, Data);
Data = (UINT8)(Frequency & 0x00FF);
IoWrite8(EFI_TIMER_2_PORT, Data);
Data = (UINT8)((Frequency & 0xFF00) >> 8);
IoWrite8(EFI_TIMER_2_PORT, Data);
return EFI_SUCCESS;
}
/**
This function will generate the beep for specified duration.
@param NumberOfBeeps Number of beeps which user want to produce
@param BeepDuration Duration for speaker gate need to be enabled
@param TimeInterval Interval between each beep
@retval EFI_STATUS
**/
EFI_STATUS
EFIAPI
GenerateBeepTone (
IN EFI_SPEAKER_IF_PROTOCOL * This,
IN UINTN NumberOfBeeps,
IN UINTN BeepDuration,
IN UINTN TimeInterval
)
{
if ((NumberOfBeeps == 1) && (BeepDuration == 0) && (TimeInterval == 0)) {
TurnOnSpeaker ();
return EFI_SUCCESS;
}
if ((NumberOfBeeps == 0) && (BeepDuration == 0) && (TimeInterval == 0)) {
TurnOffSpeaker ();
return EFI_SUCCESS;
}
if (BeepDuration == 0) {
BeepDuration = EFI_DEFAULT_SHORT_BEEP_DURATION;
}
if (TimeInterval == 0) {
TimeInterval = EFI_DEFAULT_BEEP_TIME_INTERVAL;
}
OutputBeep (NumberOfBeeps, BeepDuration, TimeInterval);
return EFI_SUCCESS;
}
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