mirror of https://github.com/acidanthera/audk.git
162 lines
3.7 KiB
C
162 lines
3.7 KiB
C
/** @file
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Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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Module Name:
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LegacySpeaker.c
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Abstract:
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This file implements DXE for Legacy Speaker.
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--*/
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#include "LegacySpeaker.h"
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/**
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This function will enable the speaker to generate beep
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@retval EFI_STATUS
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**/
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EFI_STATUS
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TurnOnSpeaker (
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)
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{
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UINT8 Data;
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Data = IoRead8 (EFI_SPEAKER_CONTROL_PORT);
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Data |= 0x03;
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IoWrite8(EFI_SPEAKER_CONTROL_PORT, Data);
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return EFI_SUCCESS;
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}
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/**
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This function will stop beep from speaker.
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@retval Status
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**/
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EFI_STATUS
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TurnOffSpeaker (
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)
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{
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UINT8 Data;
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Data = IoRead8 (EFI_SPEAKER_CONTROL_PORT);
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Data &= 0xFC;
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IoWrite8(EFI_SPEAKER_CONTROL_PORT, Data);
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return EFI_SUCCESS;
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}
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/**
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Generate beep sound based upon number of beeps and duration of the beep
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@param NumberOfBeeps Number of beeps which user want to produce
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@param BeepDuration Duration for speaker gate need to be enabled
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@param TimeInterval Interval between each beep
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@retval Does not return if the reset takes place.
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EFI_INVALID_PARAMETER If ResetType is invalid.
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**/
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EFI_STATUS
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OutputBeep (
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IN UINTN NumberOfBeep,
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IN UINTN BeepDuration,
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IN UINTN TimeInterval
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)
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{
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UINTN Num;
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for (Num=0; Num < NumberOfBeep; Num++) {
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TurnOnSpeaker ();
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//
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// wait some time,at least 120us
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//
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gBS->Stall (BeepDuration);
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TurnOffSpeaker();
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gBS->Stall (TimeInterval);
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}
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return EFI_SUCCESS;
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}
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/**
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This function will program the speaker tone frequency. The value should be with 64k
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boundary since it takes only 16 bit value which gets programmed in two step IO opearattion
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@param Frequency A value which should be 16 bit only.
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@retval EFI_SUCESS
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**/
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EFI_STATUS
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EFIAPI
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ProgramToneFrequency (
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IN EFI_SPEAKER_IF_PROTOCOL * This,
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IN UINT16 Frequency
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)
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{
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UINT8 Data;
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Data = 0xB6;
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IoWrite8(EFI_TIMER_CONTROL_PORT, Data);
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Data = (UINT8)(Frequency & 0x00FF);
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IoWrite8(EFI_TIMER_2_PORT, Data);
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Data = (UINT8)((Frequency & 0xFF00) >> 8);
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IoWrite8(EFI_TIMER_2_PORT, Data);
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return EFI_SUCCESS;
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}
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/**
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This function will generate the beep for specified duration.
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@param NumberOfBeeps Number of beeps which user want to produce
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@param BeepDuration Duration for speaker gate need to be enabled
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@param TimeInterval Interval between each beep
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@retval EFI_STATUS
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**/
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EFI_STATUS
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EFIAPI
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GenerateBeepTone (
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IN EFI_SPEAKER_IF_PROTOCOL * This,
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IN UINTN NumberOfBeeps,
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IN UINTN BeepDuration,
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IN UINTN TimeInterval
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)
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{
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if ((NumberOfBeeps == 1) && (BeepDuration == 0) && (TimeInterval == 0)) {
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TurnOnSpeaker ();
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return EFI_SUCCESS;
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}
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if ((NumberOfBeeps == 0) && (BeepDuration == 0) && (TimeInterval == 0)) {
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TurnOffSpeaker ();
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return EFI_SUCCESS;
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}
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if (BeepDuration == 0) {
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BeepDuration = EFI_DEFAULT_SHORT_BEEP_DURATION;
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}
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if (TimeInterval == 0) {
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TimeInterval = EFI_DEFAULT_BEEP_TIME_INTERVAL;
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}
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OutputBeep (NumberOfBeeps, BeepDuration, TimeInterval);
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return EFI_SUCCESS;
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}
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