/*
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/*
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* This file interfaces with the real-time clock found in
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* This file interfaces with the real-time clock found in
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* a Harris ICM7170
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* a Harris ICM7170
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*
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*
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* Year 2K Notes:
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* Year 2K Notes:
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*
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*
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* This chip only uses a two digit field to store the year. This
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* This chip only uses a two digit field to store the year. This
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* code uses the RTEMS Epoch as a pivot year. This lets us map the
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* code uses the RTEMS Epoch as a pivot year. This lets us map the
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* two digit year field as follows:
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* two digit year field as follows:
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*
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*
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* + two digit years 0-87 are mapped to 2000-2087.
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* + two digit years 0-87 are mapped to 2000-2087.
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* + two digit years 88-99 are mapped to 1988-1999.
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* + two digit years 88-99 are mapped to 1988-1999.
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*
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*
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* This is less than the time span supported by RTEMS.
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* This is less than the time span supported by RTEMS.
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*
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*
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* COPYRIGHT (c) 1989-1999.
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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* On-Line Applications Research Corporation (OAR).
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*
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*
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* The license and distribution terms for this file may be
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* found in the file LICENSE in this distribution or at
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* http://www.OARcorp.com/rtems/license.html.
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* http://www.OARcorp.com/rtems/license.html.
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*
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*
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* $Id: icm7170.c,v 1.2 2001-09-27 12:01:42 chris Exp $
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* $Id: icm7170.c,v 1.2 2001-09-27 12:01:42 chris Exp $
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*/
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*/
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#include <rtems.h>
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#include <rtems.h>
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#include <libchip/rtc.h>
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#include <libchip/rtc.h>
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#include <libchip/icm7170.h>
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#include <libchip/icm7170.h>
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/*
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/*
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* Control register bits
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* Control register bits
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*/
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*/
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/* XXX */
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/* XXX */
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/*
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/*
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* icm7170_initialize
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* icm7170_initialize
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*/
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*/
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void icm7170_initialize(
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void icm7170_initialize(
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int minor
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int minor
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)
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)
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{
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{
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unsigned32 icm7170;
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unsigned32 icm7170;
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setRegister_f setReg;
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setRegister_f setReg;
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unsigned32 clock;
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unsigned32 clock;
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icm7170 = RTC_Table[ minor ].ulCtrlPort1;
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icm7170 = RTC_Table[ minor ].ulCtrlPort1;
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setReg = RTC_Table[ minor ].setRegister;
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setReg = RTC_Table[ minor ].setRegister;
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/*
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/*
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* Initialize the RTC with the proper clock frequency
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* Initialize the RTC with the proper clock frequency
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*/
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*/
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clock = (unsigned32) RTC_Table[ minor ].pDeviceParams;
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clock = (unsigned32) RTC_Table[ minor ].pDeviceParams;
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(*setReg)( icm7170, ICM7170_CONTROL, 0x0c | clock );
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(*setReg)( icm7170, ICM7170_CONTROL, 0x0c | clock );
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}
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}
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/*
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/*
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* icm7170_get_time
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* icm7170_get_time
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*/
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*/
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int icm7170_get_time(
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int icm7170_get_time(
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int minor,
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int minor,
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rtems_time_of_day *time
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rtems_time_of_day *time
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)
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)
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{
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{
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unsigned32 icm7170;
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unsigned32 icm7170;
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getRegister_f getReg;
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getRegister_f getReg;
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setRegister_f setReg;
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setRegister_f setReg;
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unsigned32 year;
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unsigned32 year;
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icm7170 = RTC_Table[ minor ].ulCtrlPort1;
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icm7170 = RTC_Table[ minor ].ulCtrlPort1;
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getReg = RTC_Table[ minor ].getRegister;
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getReg = RTC_Table[ minor ].getRegister;
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setReg = RTC_Table[ minor ].setRegister;
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setReg = RTC_Table[ minor ].setRegister;
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/*
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/*
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* Put the RTC into read mode
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* Put the RTC into read mode
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*/
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*/
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(void) (*getReg)( icm7170, ICM7170_COUNTER_HUNDREDTHS );
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(void) (*getReg)( icm7170, ICM7170_COUNTER_HUNDREDTHS );
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/*
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/*
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* Now get the time
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* Now get the time
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*/
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*/
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year = (*getReg)( icm7170, ICM7170_YEAR );
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year = (*getReg)( icm7170, ICM7170_YEAR );
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if ( year < 88 )
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if ( year < 88 )
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year += 2000;
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year += 2000;
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else
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else
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year += 1900;
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year += 1900;
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time->year = year;
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time->year = year;
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time->month = (*getReg)( icm7170, ICM7170_MONTH );
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time->month = (*getReg)( icm7170, ICM7170_MONTH );
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time->day = (*getReg)( icm7170, ICM7170_DATE );
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time->day = (*getReg)( icm7170, ICM7170_DATE );
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time->hour = (*getReg)( icm7170, ICM7170_HOUR );
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time->hour = (*getReg)( icm7170, ICM7170_HOUR );
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time->minute = (*getReg)( icm7170, ICM7170_MINUTE );
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time->minute = (*getReg)( icm7170, ICM7170_MINUTE );
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time->second = (*getReg)( icm7170, ICM7170_SECOND );
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time->second = (*getReg)( icm7170, ICM7170_SECOND );
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time->ticks = 0;
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time->ticks = 0;
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/*
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/*
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* Put the RTC back into normal mode.
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* Put the RTC back into normal mode.
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*/
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*/
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(void) (*getReg)( icm7170, ICM7170_COUNTER_HUNDREDTHS );
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(void) (*getReg)( icm7170, ICM7170_COUNTER_HUNDREDTHS );
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return 0;
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return 0;
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}
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}
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/*
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/*
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* icm7170_set_time
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* icm7170_set_time
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*/
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*/
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int icm7170_set_time(
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int icm7170_set_time(
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int minor,
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int minor,
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rtems_time_of_day *time
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rtems_time_of_day *time
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)
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)
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{
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{
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unsigned32 icm7170;
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unsigned32 icm7170;
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getRegister_f getReg;
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getRegister_f getReg;
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setRegister_f setReg;
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setRegister_f setReg;
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unsigned32 year;
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unsigned32 year;
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unsigned32 clock;
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unsigned32 clock;
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icm7170 = RTC_Table[ minor ].ulCtrlPort1;
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icm7170 = RTC_Table[ minor ].ulCtrlPort1;
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getReg = RTC_Table[ minor ].getRegister;
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getReg = RTC_Table[ minor ].getRegister;
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setReg = RTC_Table[ minor ].setRegister;
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setReg = RTC_Table[ minor ].setRegister;
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clock = (unsigned32) RTC_Table[ minor ].pDeviceParams;
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clock = (unsigned32) RTC_Table[ minor ].pDeviceParams;
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year = time->year;
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year = time->year;
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if ( year >= 2088 )
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if ( year >= 2088 )
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rtems_fatal_error_occurred( RTEMS_INVALID_NUMBER );
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rtems_fatal_error_occurred( RTEMS_INVALID_NUMBER );
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if ( year >= 2000 )
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if ( year >= 2000 )
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year -= 2000;
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year -= 2000;
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else
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else
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year -= 1900;
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year -= 1900;
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(*setReg)( icm7170, ICM7170_CONTROL, 0x04 | clock );
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(*setReg)( icm7170, ICM7170_CONTROL, 0x04 | clock );
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(*setReg)( icm7170, ICM7170_YEAR, year );
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(*setReg)( icm7170, ICM7170_YEAR, year );
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(*setReg)( icm7170, ICM7170_MONTH, time->month );
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(*setReg)( icm7170, ICM7170_MONTH, time->month );
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(*setReg)( icm7170, ICM7170_DATE, time->day );
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(*setReg)( icm7170, ICM7170_DATE, time->day );
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(*setReg)( icm7170, ICM7170_HOUR, time->hour );
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(*setReg)( icm7170, ICM7170_HOUR, time->hour );
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(*setReg)( icm7170, ICM7170_MINUTE, time->minute );
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(*setReg)( icm7170, ICM7170_MINUTE, time->minute );
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(*setReg)( icm7170, ICM7170_SECOND, time->second );
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(*setReg)( icm7170, ICM7170_SECOND, time->second );
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/*
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/*
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* This is not really right.
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* This is not really right.
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*/
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*/
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|
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(*setReg)( icm7170, ICM7170_DAY_OF_WEEK, 1 );
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(*setReg)( icm7170, ICM7170_DAY_OF_WEEK, 1 );
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/*
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/*
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* Put the RTC back into normal mode.
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* Put the RTC back into normal mode.
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*/
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*/
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|
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(*setReg)( icm7170, ICM7170_CONTROL, 0x0c | clock );
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(*setReg)( icm7170, ICM7170_CONTROL, 0x0c | clock );
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return 0;
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return 0;
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}
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}
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/*
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/*
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* Driver function table
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* Driver function table
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*/
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*/
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|
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rtc_fns icm7170_fns = {
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rtc_fns icm7170_fns = {
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icm7170_initialize,
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icm7170_initialize,
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icm7170_get_time,
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icm7170_get_time,
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icm7170_set_time
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icm7170_set_time
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};
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};
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|
