425 lines
8.2 KiB
C
425 lines
8.2 KiB
C
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/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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io_cmos.h
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Abstract:
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This module contains a variety of constants, function prototypes,
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inline functions and external data declarations used by code to
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access the CMOS/ECMOS and well-known, standard I/O ports.
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Author:
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Forrest Foltz (forrestf) 24-Oct-2000
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--*/
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#ifndef _IO_CMOS_H_
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#define _IO_CMOS_H_
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//
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// Constants used to initialize timer 0
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//
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#if defined(NEC_98)
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#define TIMER_CONTROL_PORT (PUCHAR)0x3fdf
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#define TIMER_DATA_PORT (PUCHAR)0x3fdb
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#define TIMER_CLOCK_IN 0x2457600
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#define TIMER_CONTROL_SELECT 0x76
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#define SPEAKER_CONTROL_PORT (PUCHAR)0x61
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#define SPEAKER_OFF 0x07
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#define SPEAKER_ON 0x06
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#else
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#define TIMER1_DATA_PORT0 (PUCHAR)0x40 // Timer1, channel 0 data port
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#define TIMER1_DATA_PORT1 (PUCHAR)0x41 // Timer1, channel 1 data port
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#define TIMER1_DATA_PORT2 (PUCHAR)0x42 // Timer1, channel 2 data port
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#define TIMER1_CONTROL_PORT (PUCHAR)0x43 // Timer1 control port
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#define TIMER2_DATA_PORT0 (PUCHAR)0x48 // Timer2, channel 0 data port
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#define TIMER2_CONTROL_PORT (PUCHAR)0x4B // Timer2 control port
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#define TIMER_COMMAND_COUNTER0 0x00 // Select channel 0
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#define TIMER_COMMAND_COUNTER1 0x40 // Select channel 1
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#define TIMER_COMMAND_COUNTER2 0x80 // Select channel 2
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#define TIMER_COMMAND_RW_16BIT 0x30 // Read/Write LSB firt then MSB
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#define TIMER_COMMAND_MODE2 4 // Use mode 2
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#define TIMER_COMMAND_MODE3 6
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#define TIMER_COMMAND_BCD 0 // Binary count down
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#define TIMER_COMMAND_LATCH_READ 0 // Latch read command
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#define TIMER_CLOCK_IN 1193167
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#define SPEAKER_CONTROL_PORT (PCHAR)0x61
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#define SPEAKER_OFF_MASK 0xFC
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#define SPEAKER_ON_MASK 0x03
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#endif
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//
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// CMOS ports
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//
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#define CMOS_ADDRESS_PORT (PCHAR)0x70
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#define CMOS_DATA_PORT (PCHAR)0x71
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#define ECMOS_ADDRESS_PORT_LSB (PCHAR)0x74
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#define ECMOS_ADDRESS_PORT_MSB (PCHAR)0x75
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#define ECMOS_DATA_PORT (PCHAR)0x76
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#define CMOS_STATUS_A 0x0A
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#define CMOS_STATUS_B 0x0B
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#define CMOS_STATUS_C 0x0C
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#define CMOS_STATUS_D 0x0D
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#define CMOS_STATUS_BUSY 0x80
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#define CMOS_STATUS_BANK1 0x10
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#define CMOS_BANK_1 0x100
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#define RTC_OFFSET_SECOND 0
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#define RTC_OFFSET_SECOND_ALARM 1
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#define RTC_OFFSET_MINUTE 2
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#define RTC_OFFSET_MINUTE_ALARM 3
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#define RTC_OFFSET_HOUR 4
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#define RTC_OFFSET_HOUR_ALARM 5
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#define RTC_OFFSET_DAY_OF_WEEK 6
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#define RTC_OFFSET_DATE_OF_MONTH 7
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#define RTC_OFFSET_MONTH 8
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#define RTC_OFFSET_YEAR 9
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#define RTC_OFFSET_CENTURY_MCA 0x37
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#define RTC_OFFSET_CENTURY 0x32
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#define RTC_OFFSET_CENTURY_DS 0x148
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#define REGISTER_B_DAYLIGHT_SAVINGS_TIME (1 << 0)
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#define REGISTER_B_24HOUR_MODE (1 << 1)
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#define REGISTER_B_ENABLE_ALARM_INTERRUPT (1 << 5)
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#define REGISTER_B_ENABLE_PERIODIC_INTERRUPT (1 << 6)
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VOID
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HalpIoDelay (
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VOID
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);
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#define IO_DELAY() HalpIoDelay()
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//
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// CMOS-related function prototypes
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//
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VOID
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HalpAcquireCmosSpinLockAndWait(
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VOID
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);
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//
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// Inline functions
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//
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__inline
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UCHAR
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BIN_TO_BCD (
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UCHAR Value
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)
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/*++
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Routine Description:
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This function converts an 8-bit binary value to an packed, 8-bit,
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two-digit BCD value.
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Arguments:
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Value - supplies the binary value to convert.
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Return Value:
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Returns a two-digit packed BCD representation of Value.
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--*/
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{
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UCHAR tens;
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UCHAR units;
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tens = Value / 10;
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units = Value % 10;
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return (tens << 4) + units;
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}
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__inline
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UCHAR
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BCD_TO_BIN (
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UCHAR Value
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)
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/*++
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Routine Description:
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This function converts a packed, 8-bit, two-digit BCD value to an
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8-bit binary value.
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Arguments:
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Value - supplies the BCD value to convert.
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Return Value:
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Returns a binary representation of Value.
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--*/
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{
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UCHAR tens;
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UCHAR units;
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tens = (Value >> 4) & 0x0F;
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units = Value & 0x0F;
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return tens * 10 + units;
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}
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__inline
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UCHAR
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CMOS_READ (
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UCHAR Address
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)
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/*++
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Routine Description:
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This function reads a CMOS byte.
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Arguments:
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Address - supplies the CMOS address of the value to retrieve.
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Return Value:
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Returns the value residing in CMOS at Address.
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--*/
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{
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UCHAR data;
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UCHAR oldAddress;
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//
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// Record the current control port contents, write the address,
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// read the data, and restore the control port contents.
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//
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oldAddress = READ_PORT_UCHAR(CMOS_ADDRESS_PORT);
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WRITE_PORT_UCHAR(CMOS_ADDRESS_PORT,Address);
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IO_DELAY();
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data = READ_PORT_UCHAR(CMOS_DATA_PORT);
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WRITE_PORT_UCHAR(CMOS_ADDRESS_PORT,oldAddress);
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IO_DELAY();
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return data;
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}
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__inline
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VOID
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CMOS_WRITE (
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UCHAR Address,
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UCHAR Data
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)
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/*++
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Routine Description:
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This function writes a CMOS byte.
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Arguments:
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Address - supplies the CMOS address of the value to retrieve.
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Data - supplies the value to write at the supplied address.
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Return Value:
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None.
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--*/
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{
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UCHAR oldAddress;
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//
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// Record the current control port contents, write the address,
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// write the data, and restore the control port contents.
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//
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oldAddress = READ_PORT_UCHAR(CMOS_ADDRESS_PORT);
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WRITE_PORT_UCHAR(CMOS_ADDRESS_PORT,Address);
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IO_DELAY();
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WRITE_PORT_UCHAR(CMOS_DATA_PORT,Data);
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WRITE_PORT_UCHAR(CMOS_ADDRESS_PORT,oldAddress);
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IO_DELAY();
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}
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__inline
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UCHAR
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CMOS_READ_BCD (
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UCHAR Address
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)
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/*++
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Routine Description:
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This function reads a CMOS byte as a two-digit packed BCD value and
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returns its binary representation.
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Arguments:
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Address - supplies the CMOS address of the BCD value to retrieve.
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Return Value:
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Returns the binary representation of the BCD value residing in CMOS
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at Address.
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--*/
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{
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UCHAR value;
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value = CMOS_READ(Address);
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return BCD_TO_BIN(value);
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}
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__inline
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VOID
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CMOS_WRITE_BCD (
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UCHAR Address,
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UCHAR Value
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)
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/*++
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Routine Description:
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This function writes a CMOS byte as a two-digit packed BCD value.
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Arguments:
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Address - supplies the CMOS address of the BCD value to write.
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Value - supplies the binary representation of the value to write in
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CMOS.
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Return Value:
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None.
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--*/
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{
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UCHAR value;
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ASSERT(Value <= 99);
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value = BIN_TO_BCD(Value);
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CMOS_WRITE(Address,value);
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}
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__inline
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VOID
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WRITE_PORT_USHORT_PAIR (
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IN PUCHAR LsbPort,
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IN PUCHAR MsbPort,
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IN USHORT Value
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)
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/*++
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Routine Description:
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This function retrieves a USHORT value by reading two UCHAR values,
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each from one of two supplied 8 bit ports.
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NOTE - the LsbPort is read first, followed by the MsbPort.
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Arguments:
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LsbPort - supplies the port address from which to retrieve the
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least significant UCHAR value.
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MsbPort - supplies the port address from which to retrieve the
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most significant UCHAR value.
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Return Value:
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Returns the resultant USHORT value.
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--*/
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{
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WRITE_PORT_UCHAR(LsbPort,(UCHAR)Value);
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IO_DELAY();
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WRITE_PORT_UCHAR(MsbPort,(UCHAR)(Value >> 8));
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}
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__inline
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USHORT
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READ_PORT_USHORT_PAIR (
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IN PUCHAR LsbPort,
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IN PUCHAR MsbPort
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)
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/*++
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Routine Description:
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This function retrieves a USHORT value by reading two UCHAR values,
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each from one of two supplied 8 bit ports.
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NOTE - the LsbPort is read first, followed by the MsbPort.
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Arguments:
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LsbPort - supplies the port address from which to retrieve the
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least significant UCHAR value.
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MsbPort - supplies the port address from which to retrieve the
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most significant UCHAR value.
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Return Value:
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Returns the resultant USHORT value.
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--*/
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{
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UCHAR lsByte;
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UCHAR msByte;
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lsByte = READ_PORT_UCHAR(LsbPort);
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IO_DELAY();
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msByte = READ_PORT_UCHAR(MsbPort);
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return (USHORT)lsByte | ((USHORT)msByte << 8);
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}
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extern ULONG HalpCmosCenturyOffset;
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extern UCHAR HalpRtcRegA;
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extern UCHAR HalpRtcRegB;
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#endif
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