*
* Based on arm926ejs/mx27/timer.c
*
- * 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 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, see <http://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
-#include <div64.h>
-#include <linux/types.h> /* for size_t */
-#include <linux/stddef.h> /* for NULL */
#include <asm/io.h>
#include <asm/arch-armv7/systimer.h>
#undef SYSTIMER_BASE
#define SYSTIMER_BASE 0xFFF34000 /* Timer 0 and 1 base */
-#define SYSTIMER_RATE 150000000
-static ulong timestamp;
-static ulong lastinc;
static struct systimer *systimer_base = (struct systimer *)SYSTIMER_BASE;
/*
/*
* Setup timer0
*/
+ writel(0, &systimer_base->timer0control);
writel(SYSTIMER_RELOAD, &systimer_base->timer0load);
writel(SYSTIMER_RELOAD, &systimer_base->timer0value);
- writel(SYSTIMER_EN | SYSTIMER_32BIT, &systimer_base->timer0control);
-
- reset_timer_masked();
+ writel(SYSTIMER_EN | SYSTIMER_32BIT | SYSTIMER_PRESC_256,
+ &systimer_base->timer0control);
return 0;
}
-
-#define TICK_PER_TIME ((SYSTIMER_RATE + CONFIG_SYS_HZ / 2) / CONFIG_SYS_HZ)
-#define NS_PER_TICK (1000000000 / SYSTIMER_RATE)
-
-static inline unsigned long long tick_to_time(unsigned long long tick)
-{
- do_div(tick, TICK_PER_TIME);
- return tick;
-}
-
-static inline unsigned long long time_to_tick(unsigned long long time)
-{
- return time * TICK_PER_TIME;
-}
-
-static inline unsigned long long us_to_tick(unsigned long long us)
-{
- unsigned long long tick = us << 16;
- tick += NS_PER_TICK - 1;
- do_div(tick, NS_PER_TICK);
- return tick >> 16;
-}
-
-unsigned long long get_ticks(void)
-{
- ulong now = ~readl(&systimer_base->timer0value);
-
- if (now >= lastinc) /* normal mode (non roll) */
- /* move stamp forward with absolut diff ticks */
- timestamp += (now - lastinc);
- else /* we have rollover of incrementer */
- timestamp += (0xFFFFFFFF - lastinc) + now;
- lastinc = now;
- return timestamp;
-}
-
-/*
- * Delay x useconds AND preserve advance timstamp value
- * assumes timer is ticking at 1 msec
- */
-void __udelay(ulong usec)
-{
- unsigned long long tmp;
- ulong tmo;
-
- tmo = us_to_tick(usec);
- tmp = get_ticks() + tmo; /* get current timestamp */
-
- while (get_ticks() < tmp) /* loop till event */
- /*NOP*/;
-}
-
-ulong get_timer(ulong base)
-{
- return get_timer_masked() - base;
-}
-
-void reset_timer_masked(void)
-{
- lastinc = ~readl(&systimer_base->timer0value);
- timestamp = 0;
-}
-
-void reset_timer(void)
-{
- reset_timer_masked();
-}
-
-ulong get_timer_masked(void)
-{
- return tick_to_time(get_ticks());
-}