patch-2.4.25 linux-2.4.25/arch/mips/jmr3927/common/rtc_ds1742.c

• Lines: 174
• Date: 1969-12-31 16:00:00.000000000 -0800
• Orig file: linux-2.4.24/arch/mips/jmr3927/common/rtc_ds1742.c
• Orig date: 2003-08-25 04:44:40.000000000 -0700

diff -urN linux-2.4.24/arch/mips/jmr3927/common/rtc_ds1742.c linux-2.4.25/arch/mips/jmr3927/common/rtc_ds1742.c
@@ -1,173 +0,0 @@
-/***********************************************************************
- *
- * Copyright 2001 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- *              ahennessy@mvista.com
- *
- * arch/mips/jmr3927/common/rtc_ds1742.c
- * Based on arch/mips/ddb5xxx/common/rtc_ds1386.c
- *     low-level RTC hookups for s for Dallas 1742 chip.
- *
- * Copyright (C) 2000-2001 Toshiba Corporation
- *
- *  This program is free software; you can redistribute  it and/or modify it
- *  under  the terms of  the GNU General  Public License as published by the
- *  Free Software Foundation;  either version 2 of the  License, or (at your
- *  option) any later version.
- *
- *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
- *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
- *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
- *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
- *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
- *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
- *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *  You should have received a copy of the  GNU General Public License along
- *  with this program; if not, write  to the Free Software Foundation, Inc.,
- *  675 Mass Ave, Cambridge, MA 02139, USA.
- *
- ***********************************************************************
- */
-
-
-/*
- * This file exports a function, rtc_ds1386_init(), which expects an
- * uncached base address as the argument.  It will set the two function
- * pointers expected by the MIPS generic timer code.
- */
-
-#include <linux/types.h>
-#include <linux/time.h>
-#include <linux/rtc.h>
-
-#include <asm/time.h>
-#include <asm/addrspace.h>
-
-#include <asm/jmr3927/ds1742rtc.h>
-#include <asm/debug.h>
-
-#define	EPOCH		2000
-
-#undef BCD_TO_BIN
-#define BCD_TO_BIN(val) (((val)&15) + ((val)>>4)*10)
-
-#undef BIN_TO_BCD
-#define BIN_TO_BCD(val) ((((val)/10)<<4) + (val)%10)
-
-static unsigned long rtc_base;
-
-static unsigned long
-rtc_ds1742_get_time(void)
-{
-	unsigned int year, month, day, hour, minute, second;
-	unsigned int century;
-
-	CMOS_WRITE(RTC_READ, RTC_CONTROL);
-	second = BCD_TO_BIN(CMOS_READ(RTC_SECONDS) & RTC_SECONDS_MASK);
-	minute = BCD_TO_BIN(CMOS_READ(RTC_MINUTES));
-	hour = BCD_TO_BIN(CMOS_READ(RTC_HOURS));
-	day = BCD_TO_BIN(CMOS_READ(RTC_DATE));
-	month = BCD_TO_BIN(CMOS_READ(RTC_MONTH));
-	year = BCD_TO_BIN(CMOS_READ(RTC_YEAR));
-	century = BCD_TO_BIN(CMOS_READ(RTC_CENTURY) & RTC_CENTURY_MASK);
-	CMOS_WRITE(0, RTC_CONTROL);
-
-	year += century * 100;
-
-	return mktime(year, month, day, hour, minute, second);
-}
-extern void to_tm(unsigned long tim, struct rtc_time * tm);
-
-static int
-rtc_ds1742_set_time(unsigned long t)
-{
-	struct rtc_time tm;
-	u8 year, month, day, hour, minute, second;
-	u8 cmos_year, cmos_month, cmos_day, cmos_hour, cmos_minute, cmos_second;
-	int cmos_century;
-
-	CMOS_WRITE(RTC_READ, RTC_CONTROL);
-	cmos_second = (u8)(CMOS_READ(RTC_SECONDS) & RTC_SECONDS_MASK);
-	cmos_minute = (u8)CMOS_READ(RTC_MINUTES);
-	cmos_hour = (u8)CMOS_READ(RTC_HOURS);
-	cmos_day = (u8)CMOS_READ(RTC_DATE);
-	cmos_month = (u8)CMOS_READ(RTC_MONTH);
-	cmos_year = (u8)CMOS_READ(RTC_YEAR);
-	cmos_century = CMOS_READ(RTC_CENTURY) & RTC_CENTURY_MASK;
-
-	CMOS_WRITE(RTC_WRITE, RTC_CONTROL);
-
-	/* convert */
-	to_tm(t, &tm);
-
-	/* check each field one by one */
-	year = BIN_TO_BCD(tm.tm_year - EPOCH);
-	if (year != cmos_year) {
-		CMOS_WRITE(year,RTC_YEAR);
-	}
-
-	month = BIN_TO_BCD(tm.tm_mon);
-	if (month != (cmos_month & 0x1f)) {
-		CMOS_WRITE((month & 0x1f) | (cmos_month & ~0x1f),RTC_MONTH);
-	}
-
-	day = BIN_TO_BCD(tm.tm_mday);
-	if (day != cmos_day) {
-
-		CMOS_WRITE(day, RTC_DATE);
-	}
-
-	if (cmos_hour & 0x40) {
-		/* 12 hour format */
-		hour = 0x40;
-		if (tm.tm_hour > 12) {
-			hour |= 0x20 | (BIN_TO_BCD(hour-12) & 0x1f);
-		} else {
-			hour |= BIN_TO_BCD(tm.tm_hour);
-		}
-	} else {
-		/* 24 hour format */
-		hour = BIN_TO_BCD(tm.tm_hour) & 0x3f;
-	}
-	if (hour != cmos_hour) CMOS_WRITE(hour, RTC_HOURS);
-
-	minute = BIN_TO_BCD(tm.tm_min);
-	if (minute !=  cmos_minute) {
-		CMOS_WRITE(minute, RTC_MINUTES);
-	}
-
-	second = BIN_TO_BCD(tm.tm_sec);
-	if (second !=  cmos_second) {
-		CMOS_WRITE(second & RTC_SECONDS_MASK,RTC_SECONDS);
-	}
-
-	/* RTC_CENTURY and RTC_CONTROL share same address... */
-	CMOS_WRITE(cmos_century, RTC_CONTROL);
-
-	return 0;
-}
-
-void
-rtc_ds1742_init(unsigned long base)
-{
-	u8  cmos_second;
-
-	/* remember the base */
-	rtc_base = base;
-	db_assert((rtc_base & 0xe0000000) == KSEG1);
-
-	/* set the function pointers */
-	rtc_get_time = rtc_ds1742_get_time;
-	rtc_set_time = rtc_ds1742_set_time;
-
-	/* clear oscillator stop bit */
-	CMOS_WRITE(RTC_READ, RTC_CONTROL);
-	cmos_second = (u8)(CMOS_READ(RTC_SECONDS) & RTC_SECONDS_MASK);
-	CMOS_WRITE(RTC_WRITE, RTC_CONTROL);
-	CMOS_WRITE(cmos_second, RTC_SECONDS); /* clear msb */
-	CMOS_WRITE(0, RTC_CONTROL);
-}