diff options
Diffstat (limited to 'arch/mips/jmr3927/common/rtc_ds1742.c')
| -rw-r--r-- | arch/mips/jmr3927/common/rtc_ds1742.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/arch/mips/jmr3927/common/rtc_ds1742.c b/arch/mips/jmr3927/common/rtc_ds1742.c deleted file mode 100644 index e656134..0000000 --- a/arch/mips/jmr3927/common/rtc_ds1742.c +++ /dev/null @@ -1,171 +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/bcd.h> -#include <linux/types.h> -#include <linux/time.h> -#include <linux/rtc.h> -#include <linux/ds1742rtc.h> - -#include <asm/time.h> -#include <asm/addrspace.h> - -#include <asm/debug.h> - -#define EPOCH 2000 - -static unsigned long rtc_base; - -static unsigned long -rtc_ds1742_get_time(void) -{ - unsigned int year, month, day, hour, minute, second; - unsigned int century; - unsigned long flags; - - spin_lock_irqsave(&rtc_lock, flags); - rtc_write(RTC_READ, RTC_CONTROL); - second = BCD2BIN(rtc_read(RTC_SECONDS) & RTC_SECONDS_MASK); - minute = BCD2BIN(rtc_read(RTC_MINUTES)); - hour = BCD2BIN(rtc_read(RTC_HOURS)); - day = BCD2BIN(rtc_read(RTC_DATE)); - month = BCD2BIN(rtc_read(RTC_MONTH)); - year = BCD2BIN(rtc_read(RTC_YEAR)); - century = BCD2BIN(rtc_read(RTC_CENTURY) & RTC_CENTURY_MASK); - rtc_write(0, RTC_CONTROL); - spin_unlock_irqrestore(&rtc_lock, flags); - - 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; - unsigned long flags; - - spin_lock_irqsave(&rtc_lock, flags); - rtc_write(RTC_READ, RTC_CONTROL); - cmos_second = (u8)(rtc_read(RTC_SECONDS) & RTC_SECONDS_MASK); - cmos_minute = (u8)rtc_read(RTC_MINUTES); - cmos_hour = (u8)rtc_read(RTC_HOURS); - cmos_day = (u8)rtc_read(RTC_DATE); - cmos_month = (u8)rtc_read(RTC_MONTH); - cmos_year = (u8)rtc_read(RTC_YEAR); - cmos_century = rtc_read(RTC_CENTURY) & RTC_CENTURY_MASK; - - rtc_write(RTC_WRITE, RTC_CONTROL); - - /* convert */ - to_tm(t, &tm); - - /* check each field one by one */ - year = BIN2BCD(tm.tm_year - EPOCH); - if (year != cmos_year) { - rtc_write(year,RTC_YEAR); - } - - month = BIN2BCD(tm.tm_mon); - if (month != (cmos_month & 0x1f)) { - rtc_write((month & 0x1f) | (cmos_month & ~0x1f),RTC_MONTH); - } - - day = BIN2BCD(tm.tm_mday); - if (day != cmos_day) { - - rtc_write(day, RTC_DATE); - } - - if (cmos_hour & 0x40) { - /* 12 hour format */ - hour = 0x40; - if (tm.tm_hour > 12) { - hour |= 0x20 | (BIN2BCD(hour-12) & 0x1f); - } else { - hour |= BIN2BCD(tm.tm_hour); - } - } else { - /* 24 hour format */ - hour = BIN2BCD(tm.tm_hour) & 0x3f; - } - if (hour != cmos_hour) rtc_write(hour, RTC_HOURS); - - minute = BIN2BCD(tm.tm_min); - if (minute != cmos_minute) { - rtc_write(minute, RTC_MINUTES); - } - - second = BIN2BCD(tm.tm_sec); - if (second != cmos_second) { - rtc_write(second & RTC_SECONDS_MASK,RTC_SECONDS); - } - - /* RTC_CENTURY and RTC_CONTROL share same address... */ - rtc_write(cmos_century, RTC_CONTROL); - spin_unlock_irqrestore(&rtc_lock, flags); - - 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_mips_get_time = rtc_ds1742_get_time; - rtc_mips_set_time = rtc_ds1742_set_time; - - /* clear oscillator stop bit */ - rtc_write(RTC_READ, RTC_CONTROL); - cmos_second = (u8)(rtc_read(RTC_SECONDS) & RTC_SECONDS_MASK); - rtc_write(RTC_WRITE, RTC_CONTROL); - rtc_write(cmos_second, RTC_SECONDS); /* clear msb */ - rtc_write(0, RTC_CONTROL); -} |
