From 02733a9613a46083196136a7b216c96292b82cb8 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Wed, 29 Jul 1998 00:38:51 +0000
Subject: New file.  Based on merged of shared libchip style console.c and the
 existing TOD interface.

---
 c/src/lib/libbsp/shared/tod.c | 187 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 187 insertions(+)
 create mode 100644 c/src/lib/libbsp/shared/tod.c

diff --git a/c/src/lib/libbsp/shared/tod.c b/c/src/lib/libbsp/shared/tod.c
new file mode 100644
index 0000000000..c414e9e47b
--- /dev/null
+++ b/c/src/lib/libbsp/shared/tod.c
@@ -0,0 +1,187 @@
+/*
+ *  Real Time Clock Driver Wrapper for Libchip
+ *
+ *  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>
+
+/*
+ *  Configuration Information
+ */
+
+extern unsigned long              RTC_Count;
+extern rtems_device_minor_number  RTC_Minor;
+
+int RTC_Present;
+
+/*
+ *  rtc_initialize
+ *
+ *  Initialize the RTC driver
+ */
+
+rtems_device_driver rtc_initialize(
+  rtems_device_major_number  major,
+  rtems_device_minor_number  minor_arg,
+  void                      *arg
+)
+{
+  rtems_device_minor_number  minor;
+  rtems_status_code          status;
+
+  for (minor=0; minor < RTC_Count ; minor++) {
+    /* 
+     * First perform the configuration dependent probe, then the
+     * device dependent probe
+     */
+
+    if (RTC_Table[minor].deviceProbe && RTC_Table[minor].deviceProbe(minor)) {
+      /* 
+       * Use this device as the primary RTC
+       */
+      RTC_Minor = minor;
+      RTC_Present = 1;
+      break;
+    }
+  }
+
+  if ( !RTC_Present ) {
+    /* 
+     * Failed to find an RTC -- this is not a fatal error.
+     */
+
+    return RTEMS_INVALID_NUMBER;
+  }
+
+  /*
+   *  Register and initialize the primary RTC's
+   */
+
+  status = rtems_io_register_name( "/dev/rtc", major, RTC_Minor );
+  if (status != RTEMS_SUCCESSFUL) {
+    rtems_fatal_error_occurred(status);
+  }
+
+  RTC_Table[minor].pDeviceFns->deviceInitialize( RTC_Minor );
+
+  /*
+   *  Now initialize any secondary RTC's 
+   */
+
+  for ( minor++ ; minor<RTC_Count ; minor++) {
+    /*
+     * First perform the configuration dependent probe, then the
+     * device dependent probe
+     */
+
+    if (RTC_Table[minor].deviceProbe && RTC_Table[minor].deviceProbe(minor)) {
+      status = rtems_io_register_name(
+        RTC_Table[minor].sDeviceName,
+        major,
+        minor );
+      if (status != RTEMS_SUCCESSFUL) {
+        rtems_fatal_error_occurred(status);
+      }
+
+      /*
+       * Initialize the hardware device.
+       */
+
+      RTC_Table[minor].pDeviceFns->deviceInitialize(minor);
+
+    }
+  }
+
+  return RTEMS_SUCCESSFUL;
+}
+
+
+/*PAGE
+ *
+ *  This routine copies the time from the real time clock to RTEMS
+ * 
+ *  Input parameters:  NONE
+ * 
+ *  Output parameters:  NONE
+ *
+ *  Return values: NONE
+ */
+
+void setRealTimeToRTEMS()
+{
+  rtems_time_of_day rtc_tod;
+
+  if (!RTC_Present)
+    return;
+
+  RTC_Table[RTC_Minor].pDeviceFns->deviceGetTime(RTC_Minor, &rtc_tod);
+  rtems_clock_set( &rtc_tod );
+}
+
+/*PAGE
+ *
+ *  setRealTimeFromRTEMS
+ *
+ *  This routine copies the time from RTEMS to the real time clock
+ * 
+ *  Input parameters:  NONE
+ * 
+ *  Output parameters:  NONE
+ *
+ *  Return values: NONE
+ */
+
+void setRealTimeFromRTEMS()
+{
+  rtems_time_of_day rtems_tod;
+
+  if (!RTC_Present)
+    return;
+
+  rtems_clock_get( RTEMS_CLOCK_GET_TOD, &rtems_tod );
+  RTC_Table[RTC_Minor].pDeviceFns->deviceSetTime(RTC_Minor, &rtems_tod);
+}
+
+/*PAGE
+ *
+ *  checkRealTime
+ *
+ *  This routine reads the returns the variance betweent the real time and
+ *  rtems time.
+ * 
+ *  Input parameters: NONE
+ * 
+ *  Output parameters:  NONE
+ *
+ *  Return values: 
+ *    int   The differance between the real time clock and rtems time or
+ *          9999 in the event of an error.
+ */
+
+int checkRealTime()
+{
+  rtems_time_of_day rtems_tod;
+  rtems_time_of_day rtc_tod;
+
+  if (!RTC_Present)
+    return 0;
+
+  rtems_clock_get( RTEMS_CLOCK_GET_TOD, &rtems_tod );
+  RTC_Table[RTC_Minor].pDeviceFns->deviceGetTime(RTC_Minor, &rtc_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;
+}
+
-- 
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