mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-26 21:13:48 +00:00
122 lines
2.6 KiB
C
122 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Faraday FTRTC010 Real Time Clock
|
|
*
|
|
* (C) Copyright 2009 Faraday Technology
|
|
* Po-Yu Chuang <ratbert@faraday-tech.com>
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <common.h>
|
|
#include <log.h>
|
|
#include <rtc.h>
|
|
#include <asm/io.h>
|
|
|
|
struct ftrtc010 {
|
|
unsigned int sec; /* 0x00 */
|
|
unsigned int min; /* 0x04 */
|
|
unsigned int hour; /* 0x08 */
|
|
unsigned int day; /* 0x0c */
|
|
unsigned int alarm_sec; /* 0x10 */
|
|
unsigned int alarm_min; /* 0x14 */
|
|
unsigned int alarm_hour; /* 0x18 */
|
|
unsigned int record; /* 0x1c */
|
|
unsigned int cr; /* 0x20 */
|
|
unsigned int wsec; /* 0x24 */
|
|
unsigned int wmin; /* 0x28 */
|
|
unsigned int whour; /* 0x2c */
|
|
unsigned int wday; /* 0x30 */
|
|
unsigned int intr; /* 0x34 */
|
|
unsigned int div; /* 0x38 */
|
|
unsigned int rev; /* 0x3c */
|
|
};
|
|
|
|
/*
|
|
* RTC Control Register
|
|
*/
|
|
#define FTRTC010_CR_ENABLE (1 << 0)
|
|
#define FTRTC010_CR_INTERRUPT_SEC (1 << 1) /* per second irq */
|
|
#define FTRTC010_CR_INTERRUPT_MIN (1 << 2) /* per minute irq */
|
|
#define FTRTC010_CR_INTERRUPT_HR (1 << 3) /* per hour irq */
|
|
#define FTRTC010_CR_INTERRUPT_DAY (1 << 4) /* per day irq */
|
|
|
|
static struct ftrtc010 *rtc = (struct ftrtc010 *)CONFIG_FTRTC010_BASE;
|
|
|
|
static void ftrtc010_enable(void)
|
|
{
|
|
writel(FTRTC010_CR_ENABLE, &rtc->cr);
|
|
}
|
|
|
|
/*
|
|
* return current time in seconds
|
|
*/
|
|
static unsigned long ftrtc010_time(void)
|
|
{
|
|
unsigned long day;
|
|
unsigned long hour;
|
|
unsigned long minute;
|
|
unsigned long second;
|
|
unsigned long second2;
|
|
|
|
do {
|
|
second = readl(&rtc->sec);
|
|
day = readl(&rtc->day);
|
|
hour = readl(&rtc->hour);
|
|
minute = readl(&rtc->min);
|
|
second2 = readl(&rtc->sec);
|
|
} while (second != second2);
|
|
|
|
return day * 24 * 60 * 60 + hour * 60 * 60 + minute * 60 + second;
|
|
}
|
|
|
|
/*
|
|
* Get the current time from the RTC
|
|
*/
|
|
|
|
int rtc_get(struct rtc_time *tmp)
|
|
{
|
|
unsigned long now;
|
|
|
|
debug("%s(): record register: %x\n",
|
|
__func__, readl(&rtc->record));
|
|
|
|
#ifdef CONFIG_FTRTC010_PCLK
|
|
now = (ftrtc010_time() + readl(&rtc->record)) / RTC_DIV_COUNT;
|
|
#else /* CONFIG_FTRTC010_EXTCLK */
|
|
now = ftrtc010_time() + readl(&rtc->record);
|
|
#endif
|
|
|
|
rtc_to_tm(now, tmp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Set the RTC
|
|
*/
|
|
int rtc_set(struct rtc_time *tmp)
|
|
{
|
|
unsigned long new;
|
|
unsigned long now;
|
|
|
|
debug("%s(): DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
|
|
__func__,
|
|
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
|
|
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
|
|
|
|
new = rtc_mktime(tmp);
|
|
|
|
now = ftrtc010_time();
|
|
|
|
debug("%s(): write %lx to record register\n", __func__, new - now);
|
|
|
|
writel(new - now, &rtc->record);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void rtc_reset(void)
|
|
{
|
|
debug("%s()\n", __func__);
|
|
ftrtc010_enable();
|
|
}
|