New files for Harris Semiconductor ICM7170.

2 files changed, 228 insertions, 0 deletions

diff --git a/c/src/libchip/rtc/icm7170.c b/c/src/libchip/rtc/icm7170.c
new file mode 100644
index 0000000000..f3cf513d2e
--- /dev/null
+++ b/c/src/libchip/rtc/icm7170.c
@@ -0,0 +1,176 @@
+/*
+ *  This file interfaces with the real-time clock found in 
+ *  a Harris ICM7170
+ *
+ *  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/icm7170.h>
+
+/*
+ *  Control register bits
+ */
+
+/* XXX */
+
+/*
+ *  icm7170_initialize
+ */
+
+void icm7170_initialize(
+  int minor
+)
+{
+  unsigned32     icm7170;
+  setRegister_f  setReg;            
+  unsigned32     clock;
+
+  icm7170 = RTC_Table[ minor ].ulCtrlPort1;
+  setReg = RTC_Table[ minor ].setRegister;
+
+  /*
+   *  Initialize the RTC with the proper clock frequency
+   */
+
+  clock = (unsigned32) RTC_Table[ minor ].pDeviceParams;
+  (*setReg)( icm7170, ICM7170_CONTROL, 0x0c | clock );
+}
+
+/*
+ *  icm7170_get_time
+ */
+
+int icm7170_get_time(
+  int                minor,
+  rtems_time_of_day *time
+)
+{
+  unsigned32     icm7170;
+  getRegister_f  getReg;
+  setRegister_f  setReg;
+  unsigned32     year;
+
+  icm7170 = RTC_Table[ minor ].ulCtrlPort1;
+  getReg = RTC_Table[ minor ].getRegister;
+  setReg = RTC_Table[ minor ].setRegister;
+
+  /*
+   *  Put the RTC into read mode
+   */
+
+  (void) (*getReg)( icm7170, ICM7170_COUNTER_HUNDREDTHS );
+
+  /*
+   *  Now get the time
+   */
+
+
+  year = (*getReg)( icm7170, ICM7170_YEAR );
+  if ( year < 88 )
+    year += 2000;
+  else
+    year += 1900;
+
+  time->year   = year;
+  time->month  = (*getReg)( icm7170, ICM7170_MONTH );
+  time->day    = (*getReg)( icm7170, ICM7170_DATE );
+  time->hour   = (*getReg)( icm7170, ICM7170_HOUR );
+  time->minute = (*getReg)( icm7170, ICM7170_MINUTE );
+  time->second = (*getReg)( icm7170, ICM7170_SECOND );
+  
+  time->ticks  = 0;
+
+  /*
+   *  Put the RTC back into normal mode.
+   */
+
+  (void) (*getReg)( icm7170, ICM7170_COUNTER_HUNDREDTHS );
+
+  return 0;
+}
+
+/*
+ *  icm7170_set_time
+ */
+
+int icm7170_set_time(
+  int                minor,
+  rtems_time_of_day *time
+)
+{
+  unsigned32     icm7170;
+  getRegister_f  getReg;
+  setRegister_f  setReg;
+  unsigned32     year;
+  unsigned32     clock;
+
+  icm7170 = RTC_Table[ minor ].ulCtrlPort1;
+  getReg = RTC_Table[ minor ].getRegister;
+  setReg = RTC_Table[ minor ].setRegister;
+  clock = (unsigned32) RTC_Table[ minor ].pDeviceParams;
+
+  year = time->year;
+
+  if ( year >= 2088 )
+    rtems_fatal_error_occurred( RTEMS_INVALID_NUMBER );
+
+  if ( year >= 2000 )
+    year -= 2000;
+  else
+    year -= 1900;
+
+  (*setReg)( icm7170, ICM7170_CONTROL, 0x04 | clock );
+
+  (*setReg)( icm7170, ICM7170_YEAR,    year );
+  (*setReg)( icm7170, ICM7170_MONTH,   time->month );
+  (*setReg)( icm7170, ICM7170_DATE,    time->day );
+  (*setReg)( icm7170, ICM7170_HOUR,    time->hour );
+  (*setReg)( icm7170, ICM7170_MINUTE,  time->minute );
+  (*setReg)( icm7170, ICM7170_SECOND,  time->second );
+ 
+  /*
+   *  This is not really right.
+   */
+
+  (*setReg)( icm7170, ICM7170_DAY_OF_WEEK,  1 );
+
+  /*
+   *  Put the RTC back into normal mode.
+   */
+
+  (*setReg)( icm7170, ICM7170_CONTROL, 0x0c | clock );
+
+  return 0;
+}
+
+/*
+ *  Driver function table
+ */
+
+rtc_fns icm7170_fns = {
+  icm7170_initialize,
+  icm7170_get_time,
+  icm7170_set_time
+};
+
diff --git a/c/src/libchip/rtc/icm7170.h b/c/src/libchip/rtc/icm7170.h
new file mode 100644
index 0000000000..0e488b988c
--- /dev/null
+++ b/c/src/libchip/rtc/icm7170.h
@@ -0,0 +1,52 @@
+/*
+ *  This file contains the definitions for the following real-time clocks:
+ *
+ *    + Harris Semiconduction ICM7170
+ *
+ *  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_ICM7170_h
+#define __LIBCHIP_ICM7170_h
+
+/*
+ *  Register indices
+ */
+
+#define ICM7170_CONTROL             0x11
+
+
+#define ICM7170_COUNTER_HUNDREDTHS  0x00
+#define ICM7170_HOUR                0x01
+#define ICM7170_MINUTE              0x02
+#define ICM7170_SECOND              0x03
+#define ICM7170_MONTH               0x04
+#define ICM7170_DATE                0x05
+#define ICM7170_YEAR                0x06
+#define ICM7170_DAY_OF_WEEK         0x07
+
+/*
+ *  Configuration information in the parameters field
+ */
+
+#define ICM7170_AT_32_KHZ  0x00
+#define ICM7170_AT_1_MHZ   0x01
+#define ICM7170_AT_2_MHZ   0x02
+#define ICM7170_AT_4_MHZ   0x03
+
+/*
+ *  Driver function table
+ */
+
+extern rtc_fns icm7170_fns;
+
+#endif
+/* end of include file */