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/* Driver for Calypso RTC controller */
/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
* 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 program is distributed in the hope that 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <stdint.h>
#include <stdio.h>
#include <defines.h>
#include <debug.h>
#include <memory.h>
#include <calypso/irq.h>
#define BASE_ADDR_RTC 0xfffe1800
#define RTC_REG(x) ((void *)BASE_ADDR_RTC + (x))
enum rtc_reg {
SECOND_REG = 0x00,
MINUTES_REG = 0x01,
HOURS_REG = 0x02,
DAYS_REG = 0x03,
MONTHS_REG = 0x04,
YEARS_REG = 0x05,
WEEK_REG = 0x06,
/* reserved */
ALARM_SECOND_REG = 0x08,
ALARM_MINUTES_REG = 0x09,
ALARM_HOURS_REG = 0x0a,
ALARM_DAYS_REG = 0x0b,
ALARM_MONTHS_REG = 0x0c,
ALARM_YEARS_REG = 0x0d,
/* reserved */
/* reserved */
CTRL_REG = 0x10,
STATUS_REG = 0x11,
INT_REG = 0x12,
COMP_LSB_REG = 0x13,
COMP_MSB_REG = 0x14,
RES_PROG_REG = 0x15,
};
static int tick_ctr;
static void rtc_irq_tick(__unused enum irq_nr nr)
{
tick_ctr++;
}
void rtc_init(void)
{
irq_register_handler(IRQ_RTC_TIMER, &rtc_irq_tick);
irq_config(IRQ_RTC_TIMER, 0, 1, 0);
irq_enable(IRQ_RTC_TIMER);
/* clear power-up reset */
writeb(0x80, RTC_REG(STATUS_REG));
/* enable RTC running */
writeb(0x01, RTC_REG(CTRL_REG));
/* enable periodic interrupts every second */
writeb(0x04, RTC_REG(INT_REG));
}
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