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/*
* Copyright 2000 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
*
* ########################################################################
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* 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.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* ########################################################################
*
* RTC routines for ITE8172 MC146818-compatible rtc chip.
*
*/
#include <linux/mc146818rtc.h>
#include <asm/it8172/it8172.h>
#define IT8172_RTC_ADR_REG (IT8172_PCI_IO_BASE + IT_RTC_BASE)
#define IT8172_RTC_DAT_REG (IT8172_RTC_ADR_REG + 1)
static volatile char *rtc_adr_reg = KSEG1ADDR((volatile char *)IT8172_RTC_ADR_REG);
static volatile char *rtc_dat_reg = KSEG1ADDR((volatile char *)IT8172_RTC_DAT_REG);
unsigned char it8172_rtc_read_data(unsigned long addr)
{
unsigned char retval;
*rtc_adr_reg = addr;
retval = *rtc_dat_reg;
return retval;
}
void it8172_rtc_write_data(unsigned char data, unsigned long addr)
{
*rtc_adr_reg = addr;
*rtc_dat_reg = data;
}
static int it8172_rtc_bcd_mode(void)
{
return 0;
}
struct rtc_ops it8172_rtc_ops = {
&it8172_rtc_read_data,
&it8172_rtc_write_data,
&it8172_rtc_bcd_mode
};
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