[mirror_edk2.git] / PcAtChipsetPkg / PcatRealTimeClockRuntimeDxe / PcRtc.h

/** @file\r
  Header file for real time clock driver.\r
\r
Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r
Copyright (c) 2017, AMD Inc. All rights reserved.<BR>\r
\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
\r
#ifndef _RTC_H_\r
#define _RTC_H_\r
\r
\r
#include <Uefi.h>\r
\r
#include <Guid/Acpi.h>\r
\r
#include <Protocol/RealTimeClock.h>\r
\r
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/UefiLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/IoLib.h>\r
#include <Library/TimerLib.h>\r
#include <Library/UefiDriverEntryPoint.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/UefiRuntimeLib.h>\r
#include <Library/UefiRuntimeServicesTableLib.h>\r
#include <Library/PcdLib.h>\r
#include <Library/ReportStatusCodeLib.h>\r
\r
typedef struct {\r
  EFI_LOCK  RtcLock;\r
  INT16     SavedTimeZone;\r
  UINT8     Daylight;\r
  UINT8     CenturyRtcAddress;\r
} PC_RTC_MODULE_GLOBALS;\r
\r
extern PC_RTC_MODULE_GLOBALS  mModuleGlobal;\r
\r
#define PCAT_RTC_ADDRESS_REGISTER 0x70\r
#define PCAT_RTC_DATA_REGISTER    0x71\r
\r
//\r
// Dallas DS12C887 Real Time Clock\r
//\r
#define RTC_ADDRESS_SECONDS           0   // R/W  Range 0..59\r
#define RTC_ADDRESS_SECONDS_ALARM     1   // R/W  Range 0..59\r
#define RTC_ADDRESS_MINUTES           2   // R/W  Range 0..59\r
#define RTC_ADDRESS_MINUTES_ALARM     3   // R/W  Range 0..59\r
#define RTC_ADDRESS_HOURS             4   // R/W  Range 1..12 or 0..23 Bit 7 is AM/PM\r
#define RTC_ADDRESS_HOURS_ALARM       5   // R/W  Range 1..12 or 0..23 Bit 7 is AM/PM\r
#define RTC_ADDRESS_DAY_OF_THE_WEEK   6   // R/W  Range 1..7\r
#define RTC_ADDRESS_DAY_OF_THE_MONTH  7   // R/W  Range 1..31\r
#define RTC_ADDRESS_MONTH             8   // R/W  Range 1..12\r
#define RTC_ADDRESS_YEAR              9   // R/W  Range 0..99\r
#define RTC_ADDRESS_REGISTER_A        10  // R/W[0..6]  R0[7]\r
#define RTC_ADDRESS_REGISTER_B        11  // R/W\r
#define RTC_ADDRESS_REGISTER_C        12  // RO\r
#define RTC_ADDRESS_REGISTER_D        13  // RO\r
//\r
// Date and time initial values.\r
// They are used if the RTC values are invalid during driver initialization\r
//\r
#define RTC_INIT_SECOND 0\r
#define RTC_INIT_MINUTE 0\r
#define RTC_INIT_HOUR   0\r
#define RTC_INIT_DAY    1\r
#define RTC_INIT_MONTH  1\r
\r
#pragma pack(1)\r
//\r
// Register A\r
//\r
typedef struct {\r
  UINT8 Rs : 4;   // Rate Selection Bits\r
  UINT8 Dv : 3;   // Divisor\r
  UINT8 Uip : 1;  // Update in progress\r
} RTC_REGISTER_A_BITS;\r
\r
typedef union {\r
  RTC_REGISTER_A_BITS Bits;\r
  UINT8               Data;\r
} RTC_REGISTER_A;\r
\r
//\r
// Register B\r
//\r
typedef struct {\r
  UINT8 Dse : 1;  // 0 - Daylight saving disabled  1 - Daylight savings enabled\r
  UINT8 Mil : 1;  // 0 - 12 hour mode              1 - 24 hour mode\r
  UINT8 Dm : 1;   // 0 - BCD Format                1 - Binary Format\r
  UINT8 Sqwe : 1; // 0 - Disable SQWE output       1 - Enable SQWE output\r
  UINT8 Uie : 1;  // 0 - Update INT disabled       1 - Update INT enabled\r
  UINT8 Aie : 1;  // 0 - Alarm INT disabled        1 - Alarm INT Enabled\r
  UINT8 Pie : 1;  // 0 - Periodic INT disabled     1 - Periodic INT Enabled\r
  UINT8 Set : 1;  // 0 - Normal operation.         1 - Updates inhibited\r
} RTC_REGISTER_B_BITS;\r
\r
typedef union {\r
  RTC_REGISTER_B_BITS Bits;\r
  UINT8               Data;\r
} RTC_REGISTER_B;\r
\r
//\r
// Register C\r
//\r
typedef struct {\r
  UINT8 Reserved : 4; // Read as zero.  Can not be written.\r
  UINT8 Uf : 1;       // Update End Interrupt Flag\r
  UINT8 Af : 1;       // Alarm Interrupt Flag\r
  UINT8 Pf : 1;       // Periodic Interrupt Flag\r
  UINT8 Irqf : 1;     // Iterrupt Request Flag = PF & PIE | AF & AIE | UF & UIE\r
} RTC_REGISTER_C_BITS;\r
\r
typedef union {\r
  RTC_REGISTER_C_BITS Bits;\r
  UINT8               Data;\r
} RTC_REGISTER_C;\r
\r
//\r
// Register D\r
//\r
typedef struct {\r
  UINT8 Reserved : 7; // Read as zero.  Can not be written.\r
  UINT8 Vrt : 1;      // Valid RAM and Time\r
} RTC_REGISTER_D_BITS;\r
\r
typedef union {\r
  RTC_REGISTER_D_BITS Bits;\r
  UINT8               Data;\r
} RTC_REGISTER_D;\r
\r
#pragma pack()\r
\r
/**\r
  Initialize RTC.\r
\r
  @param  Global            For global use inside this module.\r
\r
  @retval EFI_DEVICE_ERROR  Initialization failed due to device error.\r
  @retval EFI_SUCCESS       Initialization successful.\r
\r
**/\r
EFI_STATUS\r
PcRtcInit (\r
  IN PC_RTC_MODULE_GLOBALS  *Global\r
  );\r
\r
/**\r
  Sets the current local time and date information.\r
\r
  @param  Time                  A pointer to the current time.\r
  @param  Global                For global use inside this module.\r
\r
  @retval EFI_SUCCESS           The operation completed successfully.\r
  @retval EFI_INVALID_PARAMETER A time field is out of range.\r
  @retval EFI_DEVICE_ERROR      The time could not be set due due to hardware error.\r
\r
**/\r
EFI_STATUS\r
PcRtcSetTime (\r
  IN EFI_TIME               *Time,\r
  IN PC_RTC_MODULE_GLOBALS  *Global\r
  );\r
\r
/**\r
  Returns the current time and date information, and the time-keeping capabilities\r
  of the hardware platform.\r
\r
  @param  Time          A pointer to storage to receive a snapshot of the current time.\r
  @param  Capabilities  An optional pointer to a buffer to receive the real time clock\r
                        device's capabilities.\r
  @param  Global        For global use inside this module.\r
\r
  @retval EFI_SUCCESS            The operation completed successfully.\r
  @retval EFI_INVALID_PARAMETER  Time is NULL.\r
  @retval EFI_DEVICE_ERROR       The time could not be retrieved due to hardware error.\r
\r
**/\r
EFI_STATUS\r
PcRtcGetTime (\r
  OUT EFI_TIME              *Time,\r
  OUT EFI_TIME_CAPABILITIES *Capabilities, OPTIONAL\r
  IN  PC_RTC_MODULE_GLOBALS *Global\r
  );\r
\r
/**\r
  Sets the system wakeup alarm clock time.\r
\r
  @param  Enabled  Enable or disable the wakeup alarm.\r
  @param  Time     If Enable is TRUE, the time to set the wakeup alarm for.\r
                   If Enable is FALSE, then this parameter is optional, and may be NULL.\r
  @param  Global   For global use inside this module.\r
\r
  @retval EFI_SUCCESS           If Enable is TRUE, then the wakeup alarm was enabled.\r
                                If Enable is FALSE, then the wakeup alarm was disabled.\r
  @retval EFI_INVALID_PARAMETER A time field is out of range.\r
  @retval EFI_DEVICE_ERROR      The wakeup time could not be set due to a hardware error.\r
  @retval EFI_UNSUPPORTED       A wakeup timer is not supported on this platform.\r
\r
**/\r
EFI_STATUS\r
PcRtcSetWakeupTime (\r
  IN BOOLEAN                Enable,\r
  IN EFI_TIME               *Time,  OPTIONAL\r
  IN PC_RTC_MODULE_GLOBALS  *Global\r
  );\r
\r
/**\r
  Returns the current wakeup alarm clock setting.\r
\r
  @param  Enabled  Indicates if the alarm is currently enabled or disabled.\r
  @param  Pending  Indicates if the alarm signal is pending and requires acknowledgement.\r
  @param  Time     The current alarm setting.\r
  @param  Global   For global use inside this module.\r
\r
  @retval EFI_SUCCESS           The alarm settings were returned.\r
  @retval EFI_INVALID_PARAMETER Enabled is NULL.\r
  @retval EFI_INVALID_PARAMETER Pending is NULL.\r
  @retval EFI_INVALID_PARAMETER Time is NULL.\r
  @retval EFI_DEVICE_ERROR      The wakeup time could not be retrieved due to a hardware error.\r
  @retval EFI_UNSUPPORTED       A wakeup timer is not supported on this platform.\r
\r
**/\r
EFI_STATUS\r
PcRtcGetWakeupTime (\r
  OUT BOOLEAN               *Enabled,\r
  OUT BOOLEAN               *Pending,\r
  OUT EFI_TIME              *Time,\r
  IN  PC_RTC_MODULE_GLOBALS *Global\r
  );\r
\r
/**\r
  The user Entry Point for PcRTC module.\r
\r
  This is the entrhy point for PcRTC module. It installs the UEFI runtime service\r
  including GetTime(),SetTime(),GetWakeupTime(),and SetWakeupTime().\r
\r
  @param  ImageHandle    The firmware allocated handle for the EFI image.\r
  @param  SystemTable    A pointer to the EFI System Table.\r
\r
  @retval EFI_SUCCESS    The entry point is executed successfully.\r
  @retval Others         Some error occurs when executing this entry point.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
InitializePcRtc (\r
  IN EFI_HANDLE                            ImageHandle,\r
  IN EFI_SYSTEM_TABLE                      *SystemTable\r
  );\r
\r
/**\r
  See if all fields of a variable of EFI_TIME type is correct.\r
\r
  @param   Time   The time to be checked.\r
\r
  @retval  EFI_INVALID_PARAMETER  Some fields of Time are not correct.\r
  @retval  EFI_SUCCESS            Time is a valid EFI_TIME variable.\r
\r
**/\r
EFI_STATUS\r
RtcTimeFieldsValid (\r
  IN EFI_TIME *Time\r
  );\r
\r
/**\r
  Converts time from EFI_TIME format defined by UEFI spec to RTC's.\r
\r
  This function converts time from EFI_TIME format defined by UEFI spec to RTC's.\r
  If data mode of RTC is BCD, then converts EFI_TIME to it.\r
  If RTC is in 12-hour format, then converts EFI_TIME to it.\r
\r
  @param   Time       On input, the time data read from UEFI to convert\r
                      On output, the time converted to RTC format\r
  @param   RegisterB  Value of Register B of RTC, indicating data mode\r
**/\r
VOID\r
ConvertEfiTimeToRtcTime (\r
  IN OUT EFI_TIME        *Time,\r
  IN     RTC_REGISTER_B  RegisterB\r
  );\r
\r
\r
/**\r
  Converts time read from RTC to EFI_TIME format defined by UEFI spec.\r
\r
  This function converts raw time data read from RTC to the EFI_TIME format\r
  defined by UEFI spec.\r
  If data mode of RTC is BCD, then converts it to decimal,\r
  If RTC is in 12-hour format, then converts it to 24-hour format.\r
\r
  @param   Time       On input, the time data read from RTC to convert\r
                      On output, the time converted to UEFI format\r
  @param   RegisterB  Value of Register B of RTC, indicating data mode\r
                      and hour format.\r
\r
  @retval  EFI_INVALID_PARAMETER  Parameters passed in are invalid.\r
  @retval  EFI_SUCCESS            Convert RTC time to EFI time successfully.\r
\r
**/\r
EFI_STATUS\r
ConvertRtcTimeToEfiTime (\r
  IN OUT EFI_TIME        *Time,\r
  IN     RTC_REGISTER_B  RegisterB\r
  );\r
\r
/**\r
  Wait for a period for the RTC to be ready.\r
\r
  @param    Timeout  Tell how long it should take to wait.\r
\r
  @retval   EFI_DEVICE_ERROR   RTC device error.\r
  @retval   EFI_SUCCESS        RTC is updated and ready.  \r
**/\r
EFI_STATUS\r
RtcWaitToUpdate (\r
  UINTN Timeout\r
  );\r
\r
/**\r
  See if field Day of an EFI_TIME is correct.\r
\r
  @param    Time   Its Day field is to be checked.\r
\r
  @retval   TRUE   Day field of Time is correct.\r
  @retval   FALSE  Day field of Time is NOT correct.\r
**/\r
BOOLEAN\r
DayValid (\r
  IN  EFI_TIME  *Time\r
  );\r
\r
/**\r
  Check if it is a leapyear.\r
\r
  @param    Time   The time to be checked.\r
\r
  @retval   TRUE   It is a leapyear.\r
  @retval   FALSE  It is NOT a leapyear.\r
**/\r
BOOLEAN\r
IsLeapYear (\r
  IN EFI_TIME   *Time\r
  );\r
\r
/**\r
  Get the century RTC address from the ACPI FADT table.\r
\r
  @return  The century RTC address or 0 if not found.\r
**/\r
UINT8\r
GetCenturyRtcAddress (\r
  VOID\r
  );\r
\r
/**\r
  Notification function of ACPI Table change.\r
\r
  This is a notification function registered on ACPI Table change event.\r
  It saves the Century address stored in ACPI FADT table.\r
\r
  @param  Event        Event whose notification function is being invoked.\r
  @param  Context      Pointer to the notification function's context.\r
\r
**/\r
VOID\r
EFIAPI\r
PcRtcAcpiTableChangeCallback (\r
  IN EFI_EVENT        Event,\r
  IN VOID             *Context\r
  );\r
#endif\r
Commit	Line	Data
fb0b259e	1	/** @file\r
fb0b259e	2	Header file for real time clock driver.\r
8cd4d17c	3	\r
e38ab18a	4	Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r
8794bf26 LD	5	Copyright (c) 2017, AMD Inc. All rights reserved.<BR>\r
8794bf26 LD	6	\r
95d48e82	7	This program and the accompanying materials\r
3cfb790c	8	are licensed and made available under the terms and conditions of the BSD License\r
	9	which accompanies this distribution. The full text of the license may be found at\r
	10	http://opensource.org/licenses/bsd-license.php\r
	11	\r
	12	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	13	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
8cd4d17c	14	\r
fb0b259e	15	**/\r
8cd4d17c	16	\r
8cd4d17c	17	\r
	18	#ifndef _RTC_H_\r
	19	#define _RTC_H_\r
	20	\r
ed7748fe	21	\r
60c93673	22	#include <Uefi.h>\r
ed7748fe	23	\r
41628cbc RN	24	#include <Guid/Acpi.h>\r
41628cbc RN	25	\r
8cd4d17c	26	#include <Protocol/RealTimeClock.h>\r
ed7748fe	27	\r
8cd4d17c	28	#include <Library/BaseLib.h>\r
	29	#include <Library/DebugLib.h>\r
	30	#include <Library/UefiLib.h>\r
	31	#include <Library/BaseMemoryLib.h>\r
	32	#include <Library/IoLib.h>\r
	33	#include <Library/TimerLib.h>\r
	34	#include <Library/UefiDriverEntryPoint.h>\r
	35	#include <Library/UefiBootServicesTableLib.h>\r
	36	#include <Library/UefiRuntimeLib.h>\r
	37	#include <Library/UefiRuntimeServicesTableLib.h>\r
835e5a5f	38	#include <Library/PcdLib.h>\r
44d52203	39	#include <Library/ReportStatusCodeLib.h>\r
8cd4d17c	40	\r
8cd4d17c	41	typedef struct {\r
8cd4d17c	42	EFI_LOCK RtcLock;\r
ec35e997	43	INT16 SavedTimeZone;\r
8cd4d17c	44	UINT8 Daylight;\r
41628cbc	45	UINT8 CenturyRtcAddress;\r
8cd4d17c	46	} PC_RTC_MODULE_GLOBALS;\r
8cd4d17c	47	\r
41628cbc RN	48	extern PC_RTC_MODULE_GLOBALS mModuleGlobal;\r
41628cbc RN	49	\r
8cd4d17c	50	#define PCAT_RTC_ADDRESS_REGISTER 0x70\r
	51	#define PCAT_RTC_DATA_REGISTER 0x71\r
	52	\r
	53	//\r
	54	// Dallas DS12C887 Real Time Clock\r
	55	//\r
	56	#define RTC_ADDRESS_SECONDS 0 // R/W Range 0..59\r
	57	#define RTC_ADDRESS_SECONDS_ALARM 1 // R/W Range 0..59\r
	58	#define RTC_ADDRESS_MINUTES 2 // R/W Range 0..59\r
	59	#define RTC_ADDRESS_MINUTES_ALARM 3 // R/W Range 0..59\r
	60	#define RTC_ADDRESS_HOURS 4 // R/W Range 1..12 or 0..23 Bit 7 is AM/PM\r
	61	#define RTC_ADDRESS_HOURS_ALARM 5 // R/W Range 1..12 or 0..23 Bit 7 is AM/PM\r
	62	#define RTC_ADDRESS_DAY_OF_THE_WEEK 6 // R/W Range 1..7\r
	63	#define RTC_ADDRESS_DAY_OF_THE_MONTH 7 // R/W Range 1..31\r
	64	#define RTC_ADDRESS_MONTH 8 // R/W Range 1..12\r
	65	#define RTC_ADDRESS_YEAR 9 // R/W Range 0..99\r
	66	#define RTC_ADDRESS_REGISTER_A 10 // R/W[0..6] R0[7]\r
	67	#define RTC_ADDRESS_REGISTER_B 11 // R/W\r
	68	#define RTC_ADDRESS_REGISTER_C 12 // RO\r
	69	#define RTC_ADDRESS_REGISTER_D 13 // RO\r
8cd4d17c	70	//\r
	71	// Date and time initial values.\r
	72	// They are used if the RTC values are invalid during driver initialization\r
	73	//\r
	74	#define RTC_INIT_SECOND 0\r
	75	#define RTC_INIT_MINUTE 0\r
	76	#define RTC_INIT_HOUR 0\r
	77	#define RTC_INIT_DAY 1\r
	78	#define RTC_INIT_MONTH 1\r
8cd4d17c	79	\r
8cd4d17c	80	#pragma pack(1)\r
	81	//\r
	82	// Register A\r
	83	//\r
	84	typedef struct {\r
24115e44 ED	85	UINT8 Rs : 4; // Rate Selection Bits\r
	86	UINT8 Dv : 3; // Divisor\r
	87	UINT8 Uip : 1; // Update in progress\r
8cd4d17c	88	} RTC_REGISTER_A_BITS;\r
	89	\r
	90	typedef union {\r
	91	RTC_REGISTER_A_BITS Bits;\r
	92	UINT8 Data;\r
	93	} RTC_REGISTER_A;\r
	94	\r
	95	//\r
	96	// Register B\r
	97	//\r
	98	typedef struct {\r
24115e44 ED	99	UINT8 Dse : 1; // 0 - Daylight saving disabled 1 - Daylight savings enabled\r
	100	UINT8 Mil : 1; // 0 - 12 hour mode 1 - 24 hour mode\r
	101	UINT8 Dm : 1; // 0 - BCD Format 1 - Binary Format\r
	102	UINT8 Sqwe : 1; // 0 - Disable SQWE output 1 - Enable SQWE output\r
	103	UINT8 Uie : 1; // 0 - Update INT disabled 1 - Update INT enabled\r
	104	UINT8 Aie : 1; // 0 - Alarm INT disabled 1 - Alarm INT Enabled\r
	105	UINT8 Pie : 1; // 0 - Periodic INT disabled 1 - Periodic INT Enabled\r
	106	UINT8 Set : 1; // 0 - Normal operation. 1 - Updates inhibited\r
8cd4d17c	107	} RTC_REGISTER_B_BITS;\r
	108	\r
	109	typedef union {\r
	110	RTC_REGISTER_B_BITS Bits;\r
	111	UINT8 Data;\r
	112	} RTC_REGISTER_B;\r
	113	\r
	114	//\r
	115	// Register C\r
	116	//\r
	117	typedef struct {\r
	118	UINT8 Reserved : 4; // Read as zero. Can not be written.\r
24115e44 ED	119	UINT8 Uf : 1; // Update End Interrupt Flag\r
	120	UINT8 Af : 1; // Alarm Interrupt Flag\r
	121	UINT8 Pf : 1; // Periodic Interrupt Flag\r
	122	UINT8 Irqf : 1; // Iterrupt Request Flag = PF & PIE \| AF & AIE \| UF & UIE\r
8cd4d17c	123	} RTC_REGISTER_C_BITS;\r
	124	\r
	125	typedef union {\r
	126	RTC_REGISTER_C_BITS Bits;\r
	127	UINT8 Data;\r
	128	} RTC_REGISTER_C;\r
	129	\r
	130	//\r
	131	// Register D\r
	132	//\r
	133	typedef struct {\r
	134	UINT8 Reserved : 7; // Read as zero. Can not be written.\r
24115e44	135	UINT8 Vrt : 1; // Valid RAM and Time\r
8cd4d17c	136	} RTC_REGISTER_D_BITS;\r
	137	\r
	138	typedef union {\r
	139	RTC_REGISTER_D_BITS Bits;\r
	140	UINT8 Data;\r
	141	} RTC_REGISTER_D;\r
	142	\r
	143	#pragma pack()\r
	144	\r
8d85dc31	145	/**\r
	146	Initialize RTC.\r
	147	\r
	148	@param Global For global use inside this module.\r
	149	\r
	150	@retval EFI_DEVICE_ERROR Initialization failed due to device error.\r
	151	@retval EFI_SUCCESS Initialization successful.\r
	152	\r
	153	**/\r
8cd4d17c	154	EFI_STATUS\r
	155	PcRtcInit (\r
	156	IN PC_RTC_MODULE_GLOBALS *Global\r
21176834	157	);\r
8cd4d17c	158	\r
8d85dc31	159	/**\r
8d85dc31	160	Sets the current local time and date information.\r
8cd4d17c	161	\r
8d85dc31	162	@param Time A pointer to the current time.\r
8d85dc31	163	@param Global For global use inside this module.\r
8cd4d17c	164	\r
8d85dc31	165	@retval EFI_SUCCESS The operation completed successfully.\r
	166	@retval EFI_INVALID_PARAMETER A time field is out of range.\r
	167	@retval EFI_DEVICE_ERROR The time could not be set due due to hardware error.\r
8cd4d17c	168	\r
8d85dc31	169	**/\r
8cd4d17c	170	EFI_STATUS\r
	171	PcRtcSetTime (\r
	172	IN EFI_TIME *Time,\r
	173	IN PC_RTC_MODULE_GLOBALS *Global\r
21176834	174	);\r
8cd4d17c	175	\r
8d85dc31	176	/**\r
	177	Returns the current time and date information, and the time-keeping capabilities\r
	178	of the hardware platform.\r
8cd4d17c	179	\r
8d85dc31	180	@param Time A pointer to storage to receive a snapshot of the current time.\r
	181	@param Capabilities An optional pointer to a buffer to receive the real time clock\r
	182	device's capabilities.\r
	183	@param Global For global use inside this module.\r
8cd4d17c	184	\r
8d85dc31	185	@retval EFI_SUCCESS The operation completed successfully.\r
	186	@retval EFI_INVALID_PARAMETER Time is NULL.\r
	187	@retval EFI_DEVICE_ERROR The time could not be retrieved due to hardware error.\r
8cd4d17c	188	\r
8d85dc31	189	**/\r
8cd4d17c	190	EFI_STATUS\r
	191	PcRtcGetTime (\r
	192	OUT EFI_TIME *Time,\r
8d85dc31	193	OUT EFI_TIME_CAPABILITIES *Capabilities, OPTIONAL\r
8cd4d17c	194	IN PC_RTC_MODULE_GLOBALS *Global\r
21176834	195	);\r
8cd4d17c	196	\r
8d85dc31	197	/**\r
8d85dc31	198	Sets the system wakeup alarm clock time.\r
8cd4d17c	199	\r
8d85dc31	200	@param Enabled Enable or disable the wakeup alarm.\r
	201	@param Time If Enable is TRUE, the time to set the wakeup alarm for.\r
	202	If Enable is FALSE, then this parameter is optional, and may be NULL.\r
	203	@param Global For global use inside this module.\r
8cd4d17c	204	\r
8d85dc31	205	@retval EFI_SUCCESS If Enable is TRUE, then the wakeup alarm was enabled.\r
	206	If Enable is FALSE, then the wakeup alarm was disabled.\r
	207	@retval EFI_INVALID_PARAMETER A time field is out of range.\r
	208	@retval EFI_DEVICE_ERROR The wakeup time could not be set due to a hardware error.\r
	209	@retval EFI_UNSUPPORTED A wakeup timer is not supported on this platform.\r
8cd4d17c	210	\r
8d85dc31	211	**/\r
8cd4d17c	212	EFI_STATUS\r
	213	PcRtcSetWakeupTime (\r
	214	IN BOOLEAN Enable,\r
8d85dc31	215	IN EFI_TIME *Time, OPTIONAL\r
8d85dc31	216	IN PC_RTC_MODULE_GLOBALS *Global\r
21176834	217	);\r
8cd4d17c	218	\r
8d85dc31	219	/**\r
8d85dc31	220	Returns the current wakeup alarm clock setting.\r
8cd4d17c	221	\r
8d85dc31	222	@param Enabled Indicates if the alarm is currently enabled or disabled.\r
	223	@param Pending Indicates if the alarm signal is pending and requires acknowledgement.\r
	224	@param Time The current alarm setting.\r
	225	@param Global For global use inside this module.\r
8cd4d17c	226	\r
8d85dc31	227	@retval EFI_SUCCESS The alarm settings were returned.\r
	228	@retval EFI_INVALID_PARAMETER Enabled is NULL.\r
	229	@retval EFI_INVALID_PARAMETER Pending is NULL.\r
	230	@retval EFI_INVALID_PARAMETER Time is NULL.\r
	231	@retval EFI_DEVICE_ERROR The wakeup time could not be retrieved due to a hardware error.\r
	232	@retval EFI_UNSUPPORTED A wakeup timer is not supported on this platform.\r
8cd4d17c	233	\r
8d85dc31	234	**/\r
8cd4d17c	235	EFI_STATUS\r
	236	PcRtcGetWakeupTime (\r
	237	OUT BOOLEAN *Enabled,\r
	238	OUT BOOLEAN *Pending,\r
	239	OUT EFI_TIME *Time,\r
	240	IN PC_RTC_MODULE_GLOBALS *Global\r
21176834	241	);\r
8cd4d17c	242	\r
8d85dc31	243	/**\r
8d85dc31	244	The user Entry Point for PcRTC module.\r
8cd4d17c	245	\r
8d85dc31	246	This is the entrhy point for PcRTC module. It installs the UEFI runtime service\r
8d85dc31	247	including GetTime(),SetTime(),GetWakeupTime(),and SetWakeupTime().\r
8cd4d17c	248	\r
8d85dc31	249	@param ImageHandle The firmware allocated handle for the EFI image.\r
8d85dc31	250	@param SystemTable A pointer to the EFI System Table.\r
8cd4d17c	251	\r
8d85dc31	252	@retval EFI_SUCCESS The entry point is executed successfully.\r
8d85dc31	253	@retval Others Some error occurs when executing this entry point.\r
8cd4d17c	254	\r
8d85dc31	255	**/\r
8cd4d17c	256	EFI_STATUS\r
	257	EFIAPI\r
	258	InitializePcRtc (\r
	259	IN EFI_HANDLE ImageHandle,\r
	260	IN EFI_SYSTEM_TABLE *SystemTable\r
21176834	261	);\r
8cd4d17c	262	\r
8d85dc31	263	/**\r
8d85dc31	264	See if all fields of a variable of EFI_TIME type is correct.\r
8cd4d17c	265	\r
8d85dc31	266	@param Time The time to be checked.\r
8cd4d17c	267	\r
8d85dc31	268	@retval EFI_INVALID_PARAMETER Some fields of Time are not correct.\r
8d85dc31	269	@retval EFI_SUCCESS Time is a valid EFI_TIME variable.\r
8cd4d17c	270	\r
8d85dc31	271	**/\r
8cd4d17c	272	EFI_STATUS\r
	273	RtcTimeFieldsValid (\r
	274	IN EFI_TIME *Time\r
21176834	275	);\r
8cd4d17c	276	\r
8d85dc31	277	/**\r
8d85dc31	278	Converts time from EFI_TIME format defined by UEFI spec to RTC's.\r
8cd4d17c	279	\r
8d85dc31	280	This function converts time from EFI_TIME format defined by UEFI spec to RTC's.\r
	281	If data mode of RTC is BCD, then converts EFI_TIME to it.\r
	282	If RTC is in 12-hour format, then converts EFI_TIME to it.\r
8cd4d17c	283	\r
8d85dc31	284	@param Time On input, the time data read from UEFI to convert\r
	285	On output, the time converted to RTC format\r
	286	@param RegisterB Value of Register B of RTC, indicating data mode\r
8d85dc31	287	**/\r
8cd4d17c	288	VOID\r
8cd4d17c	289	ConvertEfiTimeToRtcTime (\r
8d85dc31	290	IN OUT EFI_TIME *Time,\r
fe320967	291	IN RTC_REGISTER_B RegisterB\r
21176834	292	);\r
8cd4d17c	293	\r
8cd4d17c	294	\r
254ba247	295	/**\r
254ba247	296	Converts time read from RTC to EFI_TIME format defined by UEFI spec.\r
8cd4d17c	297	\r
254ba247	298	This function converts raw time data read from RTC to the EFI_TIME format\r
	299	defined by UEFI spec.\r
	300	If data mode of RTC is BCD, then converts it to decimal,\r
	301	If RTC is in 12-hour format, then converts it to 24-hour format.\r
8cd4d17c	302	\r
254ba247	303	@param Time On input, the time data read from RTC to convert\r
254ba247	304	On output, the time converted to UEFI format\r
254ba247	305	@param RegisterB Value of Register B of RTC, indicating data mode\r
254ba247	306	and hour format.\r
8cd4d17c	307	\r
8d85dc31	308	@retval EFI_INVALID_PARAMETER Parameters passed in are invalid.\r
	309	@retval EFI_SUCCESS Convert RTC time to EFI time successfully.\r
	310	\r
254ba247	311	**/\r
	312	EFI_STATUS\r
	313	ConvertRtcTimeToEfiTime (\r
	314	IN OUT EFI_TIME *Time,\r
254ba247	315	IN RTC_REGISTER_B RegisterB\r
ed66e1bc	316	);\r
8cd4d17c	317	\r
8d85dc31	318	/**\r
	319	Wait for a period for the RTC to be ready.\r
	320	\r
	321	@param Timeout Tell how long it should take to wait.\r
	322	\r
	323	@retval EFI_DEVICE_ERROR RTC device error.\r
	324	@retval EFI_SUCCESS RTC is updated and ready. \r
	325	**/\r
8cd4d17c	326	EFI_STATUS\r
	327	RtcWaitToUpdate (\r
	328	UINTN Timeout\r
21176834	329	);\r
8cd4d17c	330	\r
8d85dc31	331	/**\r
8d85dc31	332	See if field Day of an EFI_TIME is correct.\r
8cd4d17c	333	\r
8d85dc31	334	@param Time Its Day field is to be checked.\r
8cd4d17c	335	\r
8d85dc31	336	@retval TRUE Day field of Time is correct.\r
	337	@retval FALSE Day field of Time is NOT correct.\r
	338	**/\r
8cd4d17c	339	BOOLEAN\r
	340	DayValid (\r
	341	IN EFI_TIME *Time\r
	342	);\r
	343	\r
8d85dc31	344	/**\r
	345	Check if it is a leapyear.\r
	346	\r
	347	@param Time The time to be checked.\r
	348	\r
	349	@retval TRUE It is a leapyear.\r
	350	@retval FALSE It is NOT a leapyear.\r
	351	**/\r
8cd4d17c	352	BOOLEAN\r
	353	IsLeapYear (\r
	354	IN EFI_TIME *Time\r
	355	);\r
	356	\r
e38ab18a RN	357	/**\r
	358	Get the century RTC address from the ACPI FADT table.\r
	359	\r
	360	@return The century RTC address or 0 if not found.\r
	361	**/\r
	362	UINT8\r
	363	GetCenturyRtcAddress (\r
	364	VOID\r
	365	);\r
	366	\r
41628cbc RN	367	/**\r
	368	Notification function of ACPI Table change.\r
	369	\r
	370	This is a notification function registered on ACPI Table change event.\r
	371	It saves the Century address stored in ACPI FADT table.\r
	372	\r
	373	@param Event Event whose notification function is being invoked.\r
	374	@param Context Pointer to the notification function's context.\r
	375	\r
	376	**/\r
	377	VOID\r
	378	EFIAPI\r
	379	PcRtcAcpiTableChangeCallback (\r
	380	IN EFI_EVENT Event,\r
	381	IN VOID *Context\r
	382	);\r
8cd4d17c	383	#endif\r