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-rw-r--r--c/src/lib/libbsp/powerpc/score603e/tod/tod_g1.c138
1 files changed, 138 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/score603e/tod/tod_g1.c b/c/src/lib/libbsp/powerpc/score603e/tod/tod_g1.c
new file mode 100644
index 0000000000..6366cf662a
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/score603e/tod/tod_g1.c
@@ -0,0 +1,138 @@
+/*
+ * Real Time Clock (SGS-Thomson M48T08/M48T18) for RTEMS
+ *
+ * This part is only found on the first generation board.
+ *
+ * Based on MVME162 TOD Driver by:
+ * COPYRIGHT (C) 1997
+ * by Katsutoshi Shibuya - BU Denken Co.,Ltd. - Sapporo - JAPAN
+ * ALL RIGHTS RESERVED
+ *
+ * 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 <tod.h>
+#include <bsp.h>
+
+/*
+ * These routines are M48T08 and M48T18 dependent and should be in
+ * a separate support library.
+ */
+
+static int M48T08_GetField(
+ volatile unsigned char *mk48t08,
+ int n,
+ unsigned char mask
+)
+{
+ unsigned char x;
+
+ x = mk48t08[n] & mask;
+ return ((x >> 4) * 10) + (x & 0x0f);
+}
+
+static void M48T08_SetField(
+ volatile unsigned char *mk48t08,
+ int n,
+ unsigned char d
+)
+{
+ mk48t08[n] = ((d / 10) << 4) + (d % 10);
+}
+
+static void M48T08_GetTOD(
+ volatile unsigned char *mk48t08,
+ rtems_time_of_day *rtc_tod
+)
+{
+ int year;
+
+ mk48t08[0] |= 0x40; /* Stop read register */
+
+ year = M48T08_GetField( mk48t08, 7, 0xff );
+ if ( year >= 88 )
+ year += 1900;
+ else
+ year += 2000;
+
+ rtc_tod->year = year;
+ rtc_tod->month = M48T08_GetField( mk48t08, 6, 0x1f );
+ rtc_tod->day = M48T08_GetField( mk48t08, 5, 0x3f );
+ rtc_tod->hour = M48T08_GetField( mk48t08, 3, 0x3f );
+ rtc_tod->minute = M48T08_GetField( mk48t08, 2, 0x7f );
+ rtc_tod->second = M48T08_GetField( mk48t08, 1, 0x7f );
+ rtc_tod->ticks = 0;
+ mk48t08[0] &= 0x3f; /* Release read register */
+}
+
+static void M48T08_SetTOD(
+ volatile unsigned char *mk48t08,
+ rtems_time_of_day *rtc_tod
+)
+{
+ int year;
+
+ year = rtc_tod->year;
+
+ if ( year >= 2088 ) /* plan ahead :) */
+ rtems_fatal_error_occurred( 0xBAD0BAD0 );
+
+ if ( year >= 2000 )
+ year -= 2000;
+ else
+ year -= 1900;
+
+ mk48t08[0] |= 0x80; /* Stop write register */
+ M48T08_SetField( mk48t08, 7, year );
+ M48T08_SetField( mk48t08, 6, rtc_tod->month );
+ M48T08_SetField( mk48t08, 5, rtc_tod->day );
+ M48T08_SetField( mk48t08, 4, 1 ); /* I don't know which day of week is */
+ M48T08_SetField( mk48t08, 3, rtc_tod->hour );
+ M48T08_SetField( mk48t08, 2, rtc_tod->minute );
+ M48T08_SetField( mk48t08, 1, rtc_tod->second );
+ mk48t08[0] &= 0x3f; /* Write these parameters */
+}
+
+/*
+ * This code is dependent on the Vista 603e's use of the M48T18 RTC/NVRAM
+ * and should remain in this file.
+ */
+
+void setRealTimeToRTEMS()
+{
+ rtems_time_of_day rtc_tod;
+
+ M48T08_GetTOD( SCORE603E_RTC_ADDRESS, &rtc_tod );
+ rtems_clock_set( &rtc_tod );
+}
+
+void setRealTimeFromRTEMS()
+{
+ rtems_time_of_day rtems_tod;
+
+ rtems_clock_get( RTEMS_CLOCK_GET_TOD, &rtems_tod );
+ M48T08_SetTOD( SCORE603E_RTC_ADDRESS, &rtems_tod );
+}
+
+int checkRealTime()
+{
+ rtems_time_of_day rtems_tod;
+ rtems_time_of_day rtc_tod;
+
+ M48T08_GetTOD( SCORE603E_RTC_ADDRESS, &rtc_tod );
+ rtems_clock_get( RTEMS_CLOCK_GET_TOD, &rtems_tod );
+
+ if( rtems_tod.year == rtc_tod.year &&
+ rtems_tod.month == rtc_tod.month &&
+ rtems_tod.day == rtc_tod.day ) {
+ return ((rtems_tod.hour - rtc_tod.hour) * 3600) +
+ ((rtems_tod.minute - rtc_tod.minute) * 60) +
+ (rtems_tod.second - rtc_tod.second);
+ }
+ return 9999;
+}