Add libchip driver for Motorola MC146818A time-of-day clock chip.

Modify i386/pc386 BSP to use this driver.

1 files changed, 67 insertions, 0 deletions

diff --git a/c/src/libchip/rtc/mc146818a.h b/c/src/libchip/rtc/mc146818a.h
new file mode 100644
index 0000000000..7ce3b60885
--- /dev/null
+++ b/c/src/libchip/rtc/mc146818a.h
@@ -0,0 +1,67 @@
+/*
+ *  This file contains the definitions for the following real-time clocks:
+ *
+ *    + Motorola MC146818A
+ *
+ *  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.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#ifndef __LIBCHIP_MC146818A_h
+#define __LIBCHIP_MC146818A_h
+
+/*
+ *  Register addresses within chip
+ */
+#define MC146818A_SEC         0x00    /* seconds */
+#define MC146818A_SECALRM     0x01    /* seconds alarm */
+#define MC146818A_MIN         0x02    /* minutes */
+#define MC146818A_MINALRM     0x03    /* minutes alarm */
+#define MC146818A_HRS         0x04    /* hours */
+#define MC146818A_HRSALRM     0x05    /* hours alarm */
+#define MC146818A_WDAY        0x06    /* week day */
+#define MC146818A_DAY         0x07    /* day of month */
+#define MC146818A_MONTH       0x08    /* month of year */
+#define MC146818A_YEAR        0x09    /* month of year */
+
+#define MC146818A_STATUSA     0x0a    /* status register A */
+#define  MC146818ASA_TUP       0x80   /* time update in progress */
+#define  MC146818ASA_DIVIDER   0x20   /* divider for 32768 crystal */
+#define  MC146818ASA_1024      0x06   /* divide to 1024 Hz */
+
+#define MC146818A_STATUSB     0x0b    /* status register B */
+#define  MC146818ASB_DST       0x01   /* Daylight Savings Time */
+#define  MC146818ASB_24HR      0x02   /* 0 = 12 hours, 1 = 24 hours */
+#define  MC146818ASB_HALT      0x80   /* stop clock updates */
+
+#define MC146818A_STATUSD     0x0d    /* status register D */
+#define  MC146818ASD_PWR       0x80   /* clock lost power */
+
+ 
+/*
+ *  Driver function table
+ */
+extern rtc_fns mc146818a_fns;
+
+/*
+ * Default register access routines
+ */
+unsigned32 mc146818a_get_register(
+  unsigned32  ulCtrlPort,
+  unsigned8   ucRegNum
+);
+
+void  mc146818a_set_register(
+  unsigned32  ulCtrlPort,
+  unsigned8   ucRegNum,
+  unsigned32  ucData
+);
+
+#endif
+/* end of include file */