patch-pre2.0.8 linux/include/asm-ppc/mc146818rtc.h

• Lines: 110
• Date: Mon May 27 12:00:59 1996
• Orig file: pre2.0.7/linux/include/asm-ppc/mc146818rtc.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file pre2.0.7/linux/include/asm-ppc/mc146818rtc.h linux/include/asm-ppc/mc146818rtc.h
@@ -0,0 +1,109 @@
+/* mc146818rtc.h - register definitions for the Real-Time-Clock / CMOS RAM
+ * Copyright Torsten Duwe <duwe@informatik.uni-erlangen.de> 1993
+ * derived from Data Sheet, Copyright Motorola 1984 (!).
+ * It was written to be part of the Linux operating system.
+ */
+/* permission is hereby granted to copy, modify and redistribute this code
+ * in terms of the GNU Library General Public License, Version 2 or later,
+ * at your option.
+ */
+
+#ifndef _MC146818RTC_H
+#define _MC146818RTC_H
+#include <asm/io.h>
+
+#ifndef MCRTC_PORT
+#define MCRTC_PORT(x)	(0x70 + (x))
+#define MCRTC_ALWAYS_BCD	1
+#endif
+
+#define CMOS_MCRTC_READ(addr) ({ \
+outb_p((addr),MCRTC_PORT(0)); \
+inb_p(MCRTC_PORT(1)); \
+})
+#define CMOS_MCRTC_WRITE(val, addr) ({ \
+outb_p((addr),MCRTC_PORT(0)); \
+outb_p((val),MCRTC_PORT(1)); \
+})
+
+/**********************************************************************
+ * register summary
+ **********************************************************************/
+#define MCRTC_SECONDS		0
+#define MCRTC_SECONDS_ALARM	1
+#define MCRTC_MINUTES		2
+#define MCRTC_MINUTES_ALARM	3
+#define MCRTC_HOURS		4
+#define MCRTC_HOURS_ALARM		5
+/* RTC_*_alarm is always true if 2 MSBs are set */
+# define MCRTC_ALARM_DONT_CARE 	0xC0
+
+#define MCRTC_DAY_OF_WEEK		6
+#define MCRTC_DAY_OF_MONTH	7
+#define MCRTC_MONTH		8
+#define MCRTC_YEAR		9
+
+/* control registers - Moto names
+ */
+#define MCRTC_REG_A		10
+#define MCRTC_REG_B		11
+#define MCRTC_REG_C		12
+#define MCRTC_REG_D		13
+
+/**********************************************************************
+ * register details
+ **********************************************************************/
+#define MCRTC_FREQ_SELECT	MCRTC_REG_A
+
+/* update-in-progress  - set to "1" 244 microsecs before RTC goes off the bus,
+ * reset after update (may take 1.984ms @ 32768Hz RefClock) is complete,
+ * totalling to a max high interval of 2.228 ms.
+ */
+# define MCRTC_UIP		0x80
+# define MCRTC_DIV_CTL		0x70
+   /* divider control: refclock values 4.194 / 1.049 MHz / 32.768 kHz */
+#  define MCRTC_REF_CLCK_4MHZ	0x00
+#  define MCRTC_REF_CLCK_1MHZ	0x10
+#  define MCRTC_REF_CLCK_32KHZ	0x20
+   /* 2 values for divider stage reset, others for "testing purposes only" */
+#  define MCRTC_DIV_RESET1	0x60
+#  define MCRTC_DIV_RESET2	0x70
+  /* Periodic intr. / Square wave rate select. 0=none, 1=32.8kHz,... 15=2Hz */
+# define MCRTC_RATE_SELECT 	0x0F
+
+/**********************************************************************/
+#define MCRTC_CONTROL	MCRTC_REG_B
+# define MCRTC_SET 0x80		/* disable updates for clock setting */
+# define MCRTC_PIE 0x40		/* periodic interrupt enable */
+# define MCRTC_AIE 0x20		/* alarm interrupt enable */
+# define MCRTC_UIE 0x10		/* update-finished interrupt enable */
+# define MCRTC_SQWE 0x08		/* enable square-wave output */
+# define MCRTC_DM_BINARY 0x04	/* all time/date values are BCD if clear */
+# define MCRTC_24H 0x02		/* 24 hour mode - else hours bit 7 means pm */
+# define MCRTC_DST_EN 0x01	/* auto switch DST - works f. USA only */
+
+/**********************************************************************/
+#define MCRTC_INTR_FLAGS	MCRTC_REG_C
+/* caution - cleared by read */
+# define MCRTC_IRQF 0x80		/* any of the following 3 is active */
+# define MCRTC_PF 0x40
+# define MCRTC_AF 0x20
+# define MCRTC_UF 0x10
+
+/**********************************************************************/
+#define MCRTC_VALID	MCRTC_REG_D
+# define MCRTC_VRT 0x80		/* valid RAM and time */
+/**********************************************************************/
+
+/* example: !(CMOS_READ(MCRTC_CONTROL) & MCRTC_DM_BINARY) 
+ * determines if the following two #defines are needed
+ */
+#ifndef BCD_TO_BIN
+#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10)
+#endif
+
+#ifndef BIN_TO_BCD
+#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)
+#endif
+
+#endif /* _MC146818RTC_H */