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First cut implementation of real-time clock support in libchip. This

Browse Source 
version compiles cleanly but there is not a BSP with a configuration
table to utilize it.
This commit is contained in:
Joel Sherrill
1998-07-28 23:03:40 +00:00
parent 009c235613
commit a1f514f197
10 changed files with 442 additions and 12 deletions
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4
c/src/lib/libchip/rtc/Makefile.in
View File

@@ -12,11 +12,13 @@ LIBNAME=librtcio.a
LIB=${ARCH}/${LIBNAME}
C_PIECES=\
rtcprobe m48t08
C_FILES=$(C_PIECES:%=%.c)
C_O_FILES=$(C_PIECES:%=${ARCH}/%.o)
INSTALLED_H_FILES=$(srcdir)/rtc.h
INSTALLED_H_FILES=$(srcdir)/rtc.h $(srcdir)/m48t08.h
SRCS=$(C_FILES) $(H_FILES) $(SYS_H_FILES) $(RTEMS_H_FILES) $(PRIVATE_H_FILES)
OBJS=$(C_O_FILES)

152
c/src/lib/libchip/rtc/m48t08.c Normal file
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@@ -0,0 +1,152 @@
/*
* This file interfaces with the real-time clock found in
* a Mostek M48T08 or M48T18 or compatibles.
*
* Year 2K Notes:
*
* This chip only uses a two digit field to store the year. This
* code uses the RTEMS Epoch as a pivot year. This lets us map the
* two digit year field as follows:
*
* + two digit years 0-87 are mapped to 2000-2087.
* + two digit years 88-99 are mapped to 1988-1999.
*
* This is less than the time span supported by RTEMS.
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems.h>
#include <libchip/rtc.h>
#include <libchip/m48t08.h>
/*
* Control register bits
*/
#define MK48T08_CONTROL_WRITE 0x80
#define MK48T08_CONTROL_READ 0x40
#define MK48T08_CONTROL_SIGN 0x20
/*
* m48t08_initialize
*/
void m48t08_initialize(
int minor
)
{
}
/*
* m48t08_get_time
*/
#define From_BCD( _x ) ((((_x) >> 4) * 10) + ((_x) & 0x0F))
#define To_BCD( _x ) ((((_x) / 10) << 4) + ((_x) % 10))
int m48t08_get_time(
int minor,
rtems_time_of_day *time
)
{
unsigned32 m48t08;
getRegister_f getReg;
setRegister_f setReg;
unsigned8 controlReg;
unsigned32 value1;
unsigned32 value2;
m48t08 = RTC_Port_Tbl[ minor ].ulCtrlPort1;
getReg = RTC_Port_Tbl[ minor ].getRegister;
setReg = RTC_Port_Tbl[ minor ].setRegister;
/*
* Put the RTC into read mode
*/
controlReg = (*getReg)( m48t08, M48T08_CONTROL );
(*setReg)( m48t08, M48T08_CONTROL, controlReg | MK48T08_CONTROL_READ );
value1 = (*getReg)( m48t08, M48T08_YEAR );
value2 = From_BCD( value1 );
if ( value2 < 88 )
time->year = 2000 + value2;
else
time->year = 1900 + value2;
value1 = (*getReg)( m48t08, M48T08_MONTH );
time->month = From_BCD( value1 );
value1 = (*getReg)( m48t08, M48T08_DATE );
time->day = From_BCD( value1 );
value1 = (*getReg)( m48t08, M48T08_HOUR );
time->hour = From_BCD( value1 );
value1 = (*getReg)( m48t08, M48T08_MINUTE );
time->minute = From_BCD( value1 );
value1 = (*getReg)( m48t08, M48T08_SECOND );
time->second = From_BCD( value1 );
/*
* Put the RTC back into normal mode.
*/
(*setReg)( m48t08, M48T08_CONTROL, controlReg );
return 0;
}
/*
* m48t08_set_time
*/
int m48t08_set_time(
int minor,
rtems_time_of_day *time
)
{
unsigned32 m48t08;
getRegister_f getReg;
setRegister_f setReg;
unsigned8 controlReg;
m48t08 = RTC_Port_Tbl[ minor ].ulCtrlPort1;
getReg = RTC_Port_Tbl[ minor ].getRegister;
setReg = RTC_Port_Tbl[ minor ].setRegister;
/*
* Put the RTC into read mode
*/
controlReg = (*getReg)( m48t08, M48T08_CONTROL );
(*setReg)( m48t08, M48T08_CONTROL, controlReg | MK48T08_CONTROL_WRITE );
if ( time->year >= 2088 )
rtems_fatal_error_occurred( RTEMS_INVALID_NUMBER );
(*setReg)( m48t08, M48T08_YEAR, To_BCD(time->year % 100) );
(*setReg)( m48t08, M48T08_MONTH, To_BCD(time->month) );
(*setReg)( m48t08, M48T08_DATE, To_BCD(time->day) );
(*setReg)( m48t08, M48T08_HOUR, To_BCD(time->hour) );
(*setReg)( m48t08, M48T08_MINUTE, To_BCD(time->minute) );
(*setReg)( m48t08, M48T08_SECOND, To_BCD(time->second) );
/*
* Put the RTC back into normal mode.
*/
(*setReg)( m48t08, M48T08_CONTROL, controlReg );
return 0;
}

36
c/src/lib/libchip/rtc/m48t08.h Normal file
View File

@@ -0,0 +1,36 @@
/*
* This file contains the definitions for the following real-time clocks:
*
* + Mostek M48T08
* + Mostek M48T18
* + Dallas Semiconductor DS1643
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#ifndef __LIBCHIP_M48T08_h
#define __LIBCHIP_M48T08_h
/*
* Register indices
*/
#define M48T08_CONTROL 0
#define M48T08_SECOND 1
#define M48T08_MINUTE 2
#define M48T08_HOUR 3
#define M48T08_DAY_OF_WEEK 4
#define M48T08_DATE 5
#define M48T08_MONTH 6
#define M48T08_YEAR 7
#endif
/* end of include file */

11
c/src/lib/libchip/rtc/rtc.h
View File

@@ -20,11 +20,9 @@
* Types for get and set register routines
*/
typedef unsigned8 (*getRegister_f)(unsigned32 port, unsigned8 register);
typedef void (*setRegister_f)(
unsigned32 port, unsigned8 reg, unsigned8 value);
typedef unsigned8 (*getData_f)(unsigned32 port);
typedef void (*setData_f)(unsigned32 port, unsigned8 value);
typedef unsigned32 (*getRegister_f)(unsigned32 port, unsigned8 register);
typedef void (*setRegister_f)(
unsigned32 port, unsigned8 reg, unsigned32 value);
typedef struct _rtc_fns {
boolean (*deviceProbe)(int minor);
@@ -79,5 +77,8 @@ typedef struct _rtc_tbl {
extern rtc_tbl RTC_Port_Tbl[];
extern unsigned long RTC_Port_Count;
boolean rtc_probe( int minor );
#endif
/* end of include file */

24
c/src/lib/libchip/rtc/rtcprobe.c Normal file
View File

@@ -0,0 +1,24 @@
/*
* This file contains the default Real-Time Clock probe routine.
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems.h>
#include <libchip/rtc.h>
boolean rtc_probe(
int minor
)
{
return TRUE;
}

4
c/src/libchip/rtc/Makefile.in
View File

@@ -12,11 +12,13 @@ LIBNAME=librtcio.a
LIB=${ARCH}/${LIBNAME}
C_PIECES=\
rtcprobe m48t08
C_FILES=$(C_PIECES:%=%.c)
C_O_FILES=$(C_PIECES:%=${ARCH}/%.o)
INSTALLED_H_FILES=$(srcdir)/rtc.h
INSTALLED_H_FILES=$(srcdir)/rtc.h $(srcdir)/m48t08.h
SRCS=$(C_FILES) $(H_FILES) $(SYS_H_FILES) $(RTEMS_H_FILES) $(PRIVATE_H_FILES)
OBJS=$(C_O_FILES)

152
c/src/libchip/rtc/m48t08.c Normal file
View File

@@ -0,0 +1,152 @@
/*
* This file interfaces with the real-time clock found in
* a Mostek M48T08 or M48T18 or compatibles.
*
* Year 2K Notes:
*
* This chip only uses a two digit field to store the year. This
* code uses the RTEMS Epoch as a pivot year. This lets us map the
* two digit year field as follows:
*
* + two digit years 0-87 are mapped to 2000-2087.
* + two digit years 88-99 are mapped to 1988-1999.
*
* This is less than the time span supported by RTEMS.
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems.h>
#include <libchip/rtc.h>
#include <libchip/m48t08.h>
/*
* Control register bits
*/
#define MK48T08_CONTROL_WRITE 0x80
#define MK48T08_CONTROL_READ 0x40
#define MK48T08_CONTROL_SIGN 0x20
/*
* m48t08_initialize
*/
void m48t08_initialize(
int minor
)
{
}
/*
* m48t08_get_time
*/
#define From_BCD( _x ) ((((_x) >> 4) * 10) + ((_x) & 0x0F))
#define To_BCD( _x ) ((((_x) / 10) << 4) + ((_x) % 10))
int m48t08_get_time(
int minor,
rtems_time_of_day *time
)
{
unsigned32 m48t08;
getRegister_f getReg;
setRegister_f setReg;
unsigned8 controlReg;
unsigned32 value1;
unsigned32 value2;
m48t08 = RTC_Port_Tbl[ minor ].ulCtrlPort1;
getReg = RTC_Port_Tbl[ minor ].getRegister;
setReg = RTC_Port_Tbl[ minor ].setRegister;
/*
* Put the RTC into read mode
*/
controlReg = (*getReg)( m48t08, M48T08_CONTROL );
(*setReg)( m48t08, M48T08_CONTROL, controlReg | MK48T08_CONTROL_READ );
value1 = (*getReg)( m48t08, M48T08_YEAR );
value2 = From_BCD( value1 );
if ( value2 < 88 )
time->year = 2000 + value2;
else
time->year = 1900 + value2;
value1 = (*getReg)( m48t08, M48T08_MONTH );
time->month = From_BCD( value1 );
value1 = (*getReg)( m48t08, M48T08_DATE );
time->day = From_BCD( value1 );
value1 = (*getReg)( m48t08, M48T08_HOUR );
time->hour = From_BCD( value1 );
value1 = (*getReg)( m48t08, M48T08_MINUTE );
time->minute = From_BCD( value1 );
value1 = (*getReg)( m48t08, M48T08_SECOND );
time->second = From_BCD( value1 );
/*
* Put the RTC back into normal mode.
*/
(*setReg)( m48t08, M48T08_CONTROL, controlReg );
return 0;
}
/*
* m48t08_set_time
*/
int m48t08_set_time(
int minor,
rtems_time_of_day *time
)
{
unsigned32 m48t08;
getRegister_f getReg;
setRegister_f setReg;
unsigned8 controlReg;
m48t08 = RTC_Port_Tbl[ minor ].ulCtrlPort1;
getReg = RTC_Port_Tbl[ minor ].getRegister;
setReg = RTC_Port_Tbl[ minor ].setRegister;
/*
* Put the RTC into read mode
*/
controlReg = (*getReg)( m48t08, M48T08_CONTROL );
(*setReg)( m48t08, M48T08_CONTROL, controlReg | MK48T08_CONTROL_WRITE );
if ( time->year >= 2088 )
rtems_fatal_error_occurred( RTEMS_INVALID_NUMBER );
(*setReg)( m48t08, M48T08_YEAR, To_BCD(time->year % 100) );
(*setReg)( m48t08, M48T08_MONTH, To_BCD(time->month) );
(*setReg)( m48t08, M48T08_DATE, To_BCD(time->day) );
(*setReg)( m48t08, M48T08_HOUR, To_BCD(time->hour) );
(*setReg)( m48t08, M48T08_MINUTE, To_BCD(time->minute) );
(*setReg)( m48t08, M48T08_SECOND, To_BCD(time->second) );
/*
* Put the RTC back into normal mode.
*/
(*setReg)( m48t08, M48T08_CONTROL, controlReg );
return 0;
}

36
c/src/libchip/rtc/m48t08.h Normal file
View File

@@ -0,0 +1,36 @@
/*
* This file contains the definitions for the following real-time clocks:
*
* + Mostek M48T08
* + Mostek M48T18
* + Dallas Semiconductor DS1643
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#ifndef __LIBCHIP_M48T08_h
#define __LIBCHIP_M48T08_h
/*
* Register indices
*/
#define M48T08_CONTROL 0
#define M48T08_SECOND 1
#define M48T08_MINUTE 2
#define M48T08_HOUR 3
#define M48T08_DAY_OF_WEEK 4
#define M48T08_DATE 5
#define M48T08_MONTH 6
#define M48T08_YEAR 7
#endif
/* end of include file */

11
c/src/libchip/rtc/rtc.h
View File

@@ -20,11 +20,9 @@
* Types for get and set register routines
*/
typedef unsigned8 (*getRegister_f)(unsigned32 port, unsigned8 register);
typedef void (*setRegister_f)(
unsigned32 port, unsigned8 reg, unsigned8 value);
typedef unsigned8 (*getData_f)(unsigned32 port);
typedef void (*setData_f)(unsigned32 port, unsigned8 value);
typedef unsigned32 (*getRegister_f)(unsigned32 port, unsigned8 register);
typedef void (*setRegister_f)(
unsigned32 port, unsigned8 reg, unsigned32 value);
typedef struct _rtc_fns {
boolean (*deviceProbe)(int minor);
@@ -79,5 +77,8 @@ typedef struct _rtc_tbl {
extern rtc_tbl RTC_Port_Tbl[];
extern unsigned long RTC_Port_Count;
boolean rtc_probe( int minor );
#endif
/* end of include file */

24
c/src/libchip/rtc/rtcprobe.c Normal file
View File

@@ -0,0 +1,24 @@
/*
* This file contains the default Real-Time Clock probe routine.
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems.h>
#include <libchip/rtc.h>
boolean rtc_probe(
int minor
)
{
return TRUE;
}