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