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alder_lake_bios/Insyde/InsydeModulePkg/Bus/Isa/PcRtcRuntimeDxe/PcRtc.h

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/** @file
Header file for real time clock driver.
;******************************************************************************
;* Copyright (c) 2012 - 2019, Insyde Software Corp. All Rights Reserved.
;*
;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
;* transmit, broadcast, present, recite, release, license or otherwise exploit
;* any part of this publication in any form, by any means, without the prior
;* written permission of Insyde Software Corporation.
;*
;******************************************************************************
Copyright (c) 2006 - 2007, 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
which 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.
*/
#ifndef _RTC_H_
#define _RTC_H_
#include <Uefi.h>
#include <Protocol/RealTimeClock.h>
#include <Protocol/Cpu.h>
#include <Guid/HobList.h>
#include <Guid/DebugMask.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/IoLib.h>
#include <Library/TimerLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/PcdLib.h>
#include <Library/CmosLib.h>
#include <Library/HobLib.h>
typedef struct {
EFI_LOCK RtcLock;
} PC_RTC_MODULE_GLOBALS;
#define TIMEZONE_UPDATED L"TimeZoneUpdated"
#define PCAT_RTC_ADDRESS_REGISTER 0x70
#define PCAT_RTC_DATA_REGISTER 0x71
//
// Dallas DS12C887 Real Time Clock
//
#define RTC_ADDRESS_SECONDS 0 // R/W Range 0..59
#define RTC_ADDRESS_SECONDS_ALARM 1 // R/W Range 0..59
#define RTC_ADDRESS_MINUTES 2 // R/W Range 0..59
#define RTC_ADDRESS_MINUTES_ALARM 3 // R/W Range 0..59
#define RTC_ADDRESS_HOURS 4 // R/W Range 1..12 or 0..23 Bit 7 is AM/PM
#define RTC_ADDRESS_HOURS_ALARM 5 // R/W Range 1..12 or 0..23 Bit 7 is AM/PM
#define RTC_ADDRESS_DAY_OF_THE_WEEK 6 // R/W Range 1..7
#define RTC_ADDRESS_DAY_OF_THE_MONTH 7 // R/W Range 1..31
#define RTC_ADDRESS_MONTH 8 // R/W Range 1..12
#define RTC_ADDRESS_YEAR 9 // R/W Range 0..99
#define RTC_ADDRESS_REGISTER_A 10 // R/W[0..6] R0[7]
#define RTC_ADDRESS_REGISTER_B 11 // R/W
#define RTC_ADDRESS_REGISTER_C 12 // RO
#define RTC_ADDRESS_REGISTER_D 13 // RO
#define RTC_ADDRESS_CENTURY 50 // R/W Range 19..20 Bit 8 is R/W
//
// The maximum retry for RTC reading
//
#define MAX_RETRY (PcdGet32 (PcdRealTimeClockRetryTime) + 1)
typedef struct {
UINT8 Address; ///< RTC offset address.
UINT8 Data; ///< Corresponding data value.
} RTC_COMPONENT;
#pragma pack(1)
//
// Register A
//
typedef struct {
UINT8 Rs : 4; ///< Rate Selection Bits
UINT8 Dv : 3; ///< Divisor
UINT8 Uip : 1; ///< Update in progress
} RTC_REGISTER_A_BITS;
typedef union {
RTC_REGISTER_A_BITS Bits;
UINT8 Data;
} RTC_REGISTER_A;
//
// Register B
//
typedef struct {
UINT8 Dse : 1; ///< 0 - Daylight saving disabled 1 - Daylight savings enabled
UINT8 Mil : 1; ///< 0 - 12 hour mode 1 - 24 hour mode
UINT8 Dm : 1; ///< 0 - BCD Format 1 - Binary Format
UINT8 Sqwe : 1; ///< 0 - Disable SQWE output 1 - Enable SQWE output
UINT8 Uie : 1; ///< 0 - Update INT disabled 1 - Update INT enabled
UINT8 Aie : 1; ///< 0 - Alarm INT disabled 1 - Alarm INT Enabled
UINT8 Pie : 1; ///< 0 - Periodic INT disabled 1 - Periodic INT Enabled
UINT8 Set : 1; ///< 0 - Normal operation. 1 - Updates inhibited
} RTC_REGISTER_B_BITS;
typedef union {
RTC_REGISTER_B_BITS Bits;
UINT8 Data;
} RTC_REGISTER_B;
//
// Register C
//
typedef struct {
UINT8 Reserved : 4; ///< Read as zero. Can not be written.
UINT8 Uf : 1; ///< Update End Interrupt Flag
UINT8 Af : 1; ///< Alarm Interrupt Flag
UINT8 Pf : 1; ///< Periodic Interrupt Flag
UINT8 Irqf : 1; ///< Iterrupt Request Flag = PF & PIE | AF & AIE | UF & UIE
} RTC_REGISTER_C_BITS;
typedef union {
RTC_REGISTER_C_BITS Bits;
UINT8 Data;
} RTC_REGISTER_C;
//
// Register D
//
typedef struct {
UINT8 Reserved : 7; ///< Read as zero. Can not be written.
UINT8 Vrt : 1; ///< Valid RAM and Time
} RTC_REGISTER_D_BITS;
typedef union {
RTC_REGISTER_D_BITS Bits;
UINT8 Data;
} RTC_REGISTER_D;
#pragma pack()
/**
Initialize RTC.
@param[in] Global For global use inside this module.
@retval EFI_SUCCESS Initialization successful.
@retval EFI_DEVICE_ERROR Initialization failed due to device error.
**/
EFI_STATUS
PcRtcInit (
IN PC_RTC_MODULE_GLOBALS *Global
);
/**
Sets the current local time and date information.
@param[in] Time A pointer to the current time.
@param[in] Global For global use inside this module.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER A time field is out of range.
@retval EFI_DEVICE_ERROR The time could not be set due due to hardware error.
**/
EFI_STATUS
PcRtcSetTime (
IN EFI_TIME *Time,
IN PC_RTC_MODULE_GLOBALS *Global
);
/**
Returns the current time and date information, and the time-keeping capabilities
of the hardware platform.
@param[out] Time A pointer to storage to receive a snapshot of the current time.
@param[out] Capabilities An optional pointer to a buffer to receive the real time clock
device's capabilities.
@param[in] Global For global use inside this module.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER Time is NULL.
@retval EFI_DEVICE_ERROR The time could not be retrieved due to hardware error.
**/
EFI_STATUS
PcRtcGetTime (
OUT EFI_TIME *Time,
OUT EFI_TIME_CAPABILITIES *Capabilities, OPTIONAL
IN PC_RTC_MODULE_GLOBALS *Global
);
/**
Sets the system wakeup alarm clock time.
@param[in] Enabled Enable or disable the wakeup alarm.
@param[in] Time If Enable is TRUE, the time to set the wakeup alarm for.
If Enable is FALSE, then this parameter is optional, and may be NULL.
@param[in] Global For global use inside this module.
@retval EFI_SUCCESS If Enable is TRUE, then the wakeup alarm was enabled.
If Enable is FALSE, then the wakeup alarm was disabled.
@retval EFI_INVALID_PARAMETER A time field is out of range.
@retval EFI_DEVICE_ERROR The wakeup time could not be set due to a hardware error.
@retval EFI_UNSUPPORTED A wakeup timer is not supported on this platform.
**/
EFI_STATUS
PcRtcSetWakeupTime (
IN BOOLEAN Enable,
IN EFI_TIME *Time, OPTIONAL
IN PC_RTC_MODULE_GLOBALS *Global
);
/**
Returns the current wakeup alarm clock setting.
@param[out] Enabled Indicates if the alarm is currently enabled or disabled.
@param[out] Pending Indicates if the alarm signal is pending and requires acknowledgment.
@param[out] Time The current alarm setting.
@param[in] Global For global use inside this module.
@retval EFI_SUCCESS The alarm settings were returned.
@retval EFI_INVALID_PARAMETER Enabled is NULL.
@retval EFI_INVALID_PARAMETER Pending is NULL.
@retval EFI_INVALID_PARAMETER Time is NULL.
@retval EFI_DEVICE_ERROR The wakeup time could not be retrieved due to a hardware error.
@retval EFI_UNSUPPORTED A wakeup timer is not supported on this platform.
**/
EFI_STATUS
PcRtcGetWakeupTime (
OUT BOOLEAN *Enabled,
OUT BOOLEAN *Pending,
OUT EFI_TIME *Time,
IN PC_RTC_MODULE_GLOBALS *Global
);
/**
The user Entry Point for PcRTC module.
This is the entrhy point for PcRTC module. It installs the UEFI runtime service
including GetTime(),SetTime(),GetWakeupTime(),and SetWakeupTime().
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval Others Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
InitializePcRtc (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
);
/**
See if all fields of a variable of EFI_TIME type is correct.
@param[in] Time The time to be checked.
@retval EFI_SUCCESS Time is a valid EFI_TIME variable.
@retval EFI_INVALID_PARAMETER Some fields of Time are not correct.
**/
EFI_STATUS
RtcTimeFieldsValid (
IN EFI_TIME *Time
);
/**
Converts time from EFI_TIME format defined by UEFI spec to RTC's.
This function converts time from EFI_TIME format defined by UEFI spec to RTC's.
If data mode of RTC is BCD, then converts EFI_TIME to it.
If RTC is in 12-hour format, then converts EFI_TIME to it.
@param[in, out] Time On input, the time data read from UEFI to convert
On output, the time converted to RTC format
@param[in] RegisterB Value of Register B of RTC, indicating data mode
@param[out] Century It is set according to EFI_TIME Time.
**/
VOID
ConvertEfiTimeToRtcTime (
IN OUT EFI_TIME *Time,
IN RTC_REGISTER_B RegisterB,
OUT UINT8 *Century
);
/**
Converts time read from RTC to EFI_TIME format defined by UEFI spec.
This function converts raw time data read from RTC to the EFI_TIME format defined by UEFI spec.
If data mode of RTC is BCD, then converts it to decimal,
If RTC is in 12-hour format, then converts it to 24-hour format.
@param[in, out] Time On input, the time data read from RTC to convert
On output, the time converted to UEFI format
@param[in] Century Value of century read from RTC.
@param[in] RegisterB Value of Register B of RTC, indicating data mode and hour format.
**/
VOID
ConvertRtcTimeToEfiTime (
IN OUT EFI_TIME *Time,
IN UINT8 Century,
IN RTC_REGISTER_B RegisterB
);
/**
Wait for a period for the RTC to be ready.
@param[in] Timeout Tell how long it should take to wait.
@retval EFI_SUCCESS RTC is updated and ready.
@retval EFI_DEVICE_ERROR RTC device error.
**/
EFI_STATUS
RtcWaitToUpdate (
IN UINTN Timeout
);
/**
See if field Day of an EFI_TIME is correct.
@param[in] Time Its Day field is to be checked.
@retval TRUE Day field of Time is correct.
@retval FALSE Day field of Time is NOT correct.
**/
BOOLEAN
DayValid (
IN EFI_TIME *Time
);
/**
Check if it is a leap year.
@param[in] Time The time to be checked.
@retval TRUE It is a leap year.
@retval FALSE It is NOT a leap year.
**/
BOOLEAN
IsLeapYear (
IN EFI_TIME *Time
);
/**
Compare the Hour, Minute and Second of the From time and the To time.
Only compare H/M/S in EFI_TIME and ignore other fields here.
@param[in] From the first time
@param[in] To the second time
@return >0 The H/M/S of the From time is later than those of To time
@return ==0 The H/M/S of the From time is same as those of To time
@return <0 The H/M/S of the From time is earlier than those of To time
**/
INTN
CompareHMS (
IN EFI_TIME *From,
IN EFI_TIME *To
);
/**
To check if second date is later than first date within 24 hours.
@param[in] From the first date
@param[in] To the second date
@retval TRUE From is previous to To within 24 hours.
@retval FALSE From is later, or it is previous to To more than 24 hours.
**/
BOOLEAN
IsWithinOneDay (
IN EFI_TIME *From,
IN EFI_TIME *To
);
#endif
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