mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 18:59:44 +00:00
86592f6059
and remove the now unused asm/arch-at91/io.h Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de>
100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
/*
|
|
* (C) Copyright 2010
|
|
* Reinhard Meyer, reinhard.meyer@emk-elektronik.de
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
/*
|
|
* Date & Time support for the internal Real-time Timer
|
|
* of AT91SAM9260 and compatibles.
|
|
* Compatible with the LinuX rtc driver workaround:
|
|
* The RTT cannot be written to, but only reset.
|
|
* The actual time is the sum of RTT and one of
|
|
* the four GPBR registers.
|
|
*
|
|
* The at91sam9260 has 4 GPBR (0-3).
|
|
* For their typical use see at91_gpbr.h !
|
|
*
|
|
* make sure u-boot and kernel use the same GPBR !
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <rtc.h>
|
|
#include <asm/io.h>
|
|
#include <asm/errno.h>
|
|
#include <asm/arch/hardware.h>
|
|
#include <asm/arch/at91_rtt.h>
|
|
#include <asm/arch/at91_gpbr.h>
|
|
|
|
#if defined(CONFIG_CMD_DATE)
|
|
|
|
int rtc_get (struct rtc_time *tmp)
|
|
{
|
|
at91_rtt_t *rtt = (at91_rtt_t *) ATMEL_BASE_RTT;
|
|
at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
|
|
ulong tim;
|
|
ulong tim2;
|
|
ulong off;
|
|
|
|
do {
|
|
tim = readl(&rtt->vr);
|
|
tim2 = readl(&rtt->vr);
|
|
} while (tim!=tim2);
|
|
off = readl(&gpbr->reg[AT91_GPBR_INDEX_TIMEOFF]);
|
|
/* off==0 means time is invalid, but we ignore that */
|
|
to_tm (tim+off, tmp);
|
|
return 0;
|
|
}
|
|
|
|
int rtc_set (struct rtc_time *tmp)
|
|
{
|
|
at91_rtt_t *rtt = (at91_rtt_t *) ATMEL_BASE_RTT;
|
|
at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
|
|
ulong tim;
|
|
|
|
tim = mktime (tmp->tm_year, tmp->tm_mon, tmp->tm_mday,
|
|
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
|
|
|
|
/* clear alarm, set prescaler to 32768, clear counter */
|
|
writel(32768+AT91_RTT_RTTRST, &rtt->mr);
|
|
writel(~0, &rtt->ar);
|
|
writel(tim, &gpbr->reg[AT91_GPBR_INDEX_TIMEOFF]);
|
|
/* wait for counter clear to happen, takes less than a 1/32768th second */
|
|
while (readl(&rtt->vr) != 0)
|
|
;
|
|
return 0;
|
|
}
|
|
|
|
void rtc_reset (void)
|
|
{
|
|
at91_rtt_t *rtt = (at91_rtt_t *) ATMEL_BASE_RTT;
|
|
at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
|
|
|
|
/* clear alarm, set prescaler to 32768, clear counter */
|
|
writel(32768+AT91_RTT_RTTRST, &rtt->mr);
|
|
writel(~0, &rtt->ar);
|
|
writel(0, &gpbr->reg[AT91_GPBR_INDEX_TIMEOFF]);
|
|
/* wait for counter clear to happen, takes less than a 1/32768th second */
|
|
while (readl(&rtt->vr) != 0)
|
|
;
|
|
}
|
|
|
|
#endif
|