[src/trunk]: src/sys/arch/amiga/dev The Ricoh chip has a seperate leapyear co...

[is <is%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e51fd9325bf8
branches:  trunk
changeset: 480099:e51fd9325bf8
user:      is <is%NetBSD.org@localhost>
date:      Mon Jan 03 21:52:14 2000 +0000

description:
The Ricoh chip has a seperate leapyear counter.
We must write this when we write the year register, keeping them in sync.
XXX the chosen algorithm only works for 1901 <= year <= 2099.

diffstat:

 sys/arch/amiga/dev/a34kbbc.c |  7 ++++---
 sys/arch/amiga/dev/rtc.h     |  5 ++++-
 2 files changed, 8 insertions(+), 4 deletions(-)

diffs (47 lines):

diff -r 0120401c9194 -r e51fd9325bf8 sys/arch/amiga/dev/a34kbbc.c
--- a/sys/arch/amiga/dev/a34kbbc.c      Mon Jan 03 20:30:51 2000 +0000
+++ b/sys/arch/amiga/dev/a34kbbc.c      Mon Jan 03 21:52:14 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: a34kbbc.c,v 1.5 2000/01/03 20:30:51 is Exp $   */
+/*     $NetBSD: a34kbbc.c,v 1.6 2000/01/03 21:52:14 is Exp $   */
 
 /*
  * Copyright (c) 1988 University of Utah.
@@ -130,7 +130,6 @@
        /* let it run again.. */
        rt->control1 = A3CONTROL1_FREE_CLOCK;
 
-       printf("year read: %d.\n", dt.dt_year);
        if (dt.dt_year < STARTOFTIME)
                dt.dt_year += 100;
 
@@ -182,7 +181,9 @@
        rt->month2  = dt.dt_mon % 10;
        rt->year1   = (dt.dt_year / 10) % 10;
        rt->year2   = dt.dt_year % 10;
-       rt->control1 = A3CONTROL1_FREE_CLOCK;
+       rt->control1 = A3CONTROL1_HOLD_CLOCK | 1;       /* mode 1 registers */
+       rt->leapyear = dt.dt_year;              /* XXX implicit % 4 */
+       rt->control1 = A3CONTROL1_FREE_CLOCK;           /* implies mode 0 */
 
        return (1);
 }
diff -r 0120401c9194 -r e51fd9325bf8 sys/arch/amiga/dev/rtc.h
--- a/sys/arch/amiga/dev/rtc.h  Mon Jan 03 20:30:51 2000 +0000
+++ b/sys/arch/amiga/dev/rtc.h  Mon Jan 03 21:52:14 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rtc.h,v 1.6 1999/03/14 22:42:12 is Exp $       */
+/*     $NetBSD: rtc.h,v 1.7 2000/01/03 21:52:15 is Exp $       */
 
 /*
  * Copyright (c) 1994 Christian E. Hopps
@@ -92,6 +92,9 @@
 #define A3CONTROL1_HOLD_CLOCK  0
 #define A3CONTROL1_FREE_CLOCK  9
 
+/* mode1 registers used by us */
+#define leapyear year2
+
 #define A3BBC_SET_REG  0xe0
 #define A3BBC_WRITE_REG        0xc2
 #define A3BBC_READ_REG 0xc3