diff options
Diffstat (limited to 'c/src/lib/libbsp/bfin/shared/clock/rtc.c')
| -rw-r--r-- | c/src/lib/libbsp/bfin/shared/clock/rtc.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/c/src/lib/libbsp/bfin/shared/clock/rtc.c b/c/src/lib/libbsp/bfin/shared/clock/rtc.c deleted file mode 100644 index aa24c36c28..0000000000 --- a/c/src/lib/libbsp/bfin/shared/clock/rtc.c +++ /dev/null @@ -1,192 +0,0 @@ -/* Real Time Clock Driver for eZKit533. - * - * Copyright (c) 2006 by Atos Automacao Industrial Ltda. - * written by Alain Schaefer <alain.schaefer@easc.ch> - * and Antonio Giovanini <antonio@atos.com.br> - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.com/license/LICENSE. - * - * $Id$ - */ - - -#include <rtems.h> -#include <bsp.h> -#include "tod.h" -#include <rtems/libio.h> -#include <rtems/score/tod.h> -#include <rtems/rtems/types.h> - -#define MSK_DAY 0xFFFE0000 -#define MSK_HOUR 0x0001F000 -#define MSK_MINUTE 0x00000FC0 -#define MSK_SECOND 0x0000003F -#define SHF_DAY 17 -#define SHF_HOUR 12 -#define SHF_MINUTE 6 -#define SHF_SECOND 0 - -/* The following are inside RTEMS -- we are violating visibility!!! - * Perhaps an API could be defined to get days since 1 Jan. - */ -extern const uint16_t _TOD_Days_to_date[2][13]; - -/* - * Prototypes and routines used below - */ -int Leap_years_until_now (int year); - -void Init_RTC(void) -{ - *((uint16_t*)RTC_PREN) = 0x0001; /* Enable Prescaler */ -} - -rtems_device_driver rtc_initialize( - rtems_device_major_number major, - rtems_device_minor_number minor_arg, - void *arg -) -{ - rtems_status_code status; - - /* - * Register and initialize the primary RTC's - */ - - status = rtems_io_register_name( "/dev/rtc", major, 0 ); - if (status != RTEMS_SUCCESSFUL) { - rtems_fatal_error_occurred(status); - } - - Init_RTC(); - - setRealTimeToRTEMS(); - return RTEMS_SUCCESSFUL; -} - -/* - * Read time from RTEMS' clock manager and set it to RTC - */ - -void setRealTimeFromRTEMS (void) -{ - rtems_time_of_day time_buffer; - rtems_status_code status; - - status = rtems_clock_get( RTEMS_CLOCK_GET_TOD, &time_buffer ); - if (status == RTEMS_SUCCESSFUL){ - setRealTime(&time_buffer); - } -} - -/* - * Read real time from RTC and set it to RTEMS' clock manager - */ - -void setRealTimeToRTEMS (void) -{ - rtems_time_of_day time_buffer; - - getRealTime(&time_buffer); - rtems_clock_set( &time_buffer ); -} - - /* - * Set the RTC time - */ -int setRealTime( - rtems_time_of_day *tod -) -{ - uint32_t days; - rtems_time_of_day tod_temp; - - tod_temp = *tod; - - days = (tod_temp.year - TOD_BASE_YEAR) * 365 + \ - _TOD_Days_to_date[0][tod_temp.month] + tod_temp.day - 1; - if (tod_temp.month < 3) - days += Leap_years_until_now (tod_temp.year - 1); - else - days += Leap_years_until_now (tod_temp.year); - - *((uint32_t*)RTC_STAT) = (days << SHF_DAY)| - (tod_temp.hour << SHF_HOUR)| - (tod_temp.minute << SHF_MINUTE)| - tod_temp.second; - - return 0; -} - - /* - * Get the time from the RTC. - */ - -void getRealTime( - rtems_time_of_day *tod -) -{ - uint32_t days, rtc_reg; - rtems_time_of_day tod_temp; - int n, Leap_year; - - rtc_reg = *((uint32_t*)RTC_STAT); - - days = (rtc_reg >> SHF_DAY) + 1; - - /* finding year */ - tod_temp.year = days/365 + TOD_BASE_YEAR; - if (days%365 > Leap_years_until_now (tod_temp.year - 1)) { - days = (days%365) - Leap_years_until_now (tod_temp.year - 1); - } else { - tod_temp.year--; - days = (days%365) + 365 - Leap_years_until_now (tod_temp.year - 1); - } - - /* finding month and day */ - Leap_year = (((!(tod_temp.year%4)) && (tod_temp.year%100)) || - (!(tod_temp.year%400)))?1:0; - for (n=1; n<=12; n++) { - if (days <= _TOD_Days_to_date[Leap_year][n+1]) { - tod_temp.month = n; - tod_temp.day = days - _TOD_Days_to_date[Leap_year][n]; - break; - } - } - - tod_temp.hour = (rtc_reg & MSK_HOUR) >> SHF_HOUR; - tod_temp.minute = (rtc_reg & MSK_MINUTE) >> SHF_MINUTE; - tod_temp.second = (rtc_reg & MSK_SECOND); - tod_temp.ticks = 0; - *tod = tod_temp; -} - -/* - * Return the difference between RTC and RTEMS' clock manager time in minutes. - * If the difference is greater than 1 day, this returns 9999. - */ - -int checkRealTime (void) -{ - rtems_time_of_day rtems_tod; - rtems_time_of_day rtc_tod; - uint32_t rtems_time; - uint32_t rtc_time; - - rtems_clock_get( RTEMS_CLOCK_GET_TOD, &rtems_tod ); - getRealTime ( &rtc_tod ); - - rtems_time = _TOD_To_seconds( &rtems_tod ); - rtc_time = _TOD_To_seconds( &rtc_tod ); - - return rtems_time - rtc_time; -} - -int Leap_years_until_now (int year) -{ - return ((year/4 - year/100 + year/400) - - ((TOD_BASE_YEAR - 1)/4 - (TOD_BASE_YEAR - 1)/100 + - (TOD_BASE_YEAR - 1)/400)); -} |