bsps: Move libchip to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

1 files changed, 168 insertions, 0 deletions

diff --git a/bsps/shared/dev/rtc/icm7170.c b/bsps/shared/dev/rtc/icm7170.c
new file mode 100644
index 0000000000..1cc9e980f7
--- /dev/null
+++ b/bsps/shared/dev/rtc/icm7170.c
@@ -0,0 +1,168 @@
+/*
+ *  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) 1989-1999.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#include <rtems.h>
+#include <libchip/rtc.h>
+#include <libchip/icm7170.h>
+
+/*
+ *  Control register bits
+ */
+
+/* XXX */
+
+/*
+ *  icm7170_initialize
+ */
+
+static void icm7170_initialize(
+  int minor
+)
+{
+  uintptr_t      icm7170;
+  setRegister_f  setReg;
+  uintptr_t      clock;
+
+  icm7170 = RTC_Table[ minor ].ulCtrlPort1;
+  setReg = RTC_Table[ minor ].setRegister;
+
+  /*
+   *  Initialize the RTC with the proper clock frequency
+   */
+
+  clock = (uintptr_t) RTC_Table[ minor ].pDeviceParams;
+  (*setReg)( icm7170, ICM7170_CONTROL, 0x0c | clock );
+}
+
+/*
+ *  icm7170_get_time
+ */
+
+static int icm7170_get_time(
+  int                minor,
+  rtems_time_of_day *time
+)
+{
+  uint32_t       icm7170;
+  getRegister_f  getReg;
+  uint32_t       year;
+
+  icm7170 = RTC_Table[ minor ].ulCtrlPort1;
+  getReg = RTC_Table[ minor ].getRegister;
+
+  /*
+   *  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
+ */
+
+static int icm7170_set_time(
+  int                minor,
+  const rtems_time_of_day *time
+)
+{
+  uintptr_t      icm7170;
+  setRegister_f  setReg;
+  uint32_t       year;
+  uintptr_t      clock;
+
+  icm7170 = RTC_Table[ minor ].ulCtrlPort1;
+  setReg = RTC_Table[ minor ].setRegister;
+  clock = (uintptr_t) 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
+};