* (C) Copyright 2002
* Gary Jennejohn, DENX Software Engineering, <garyj@denx.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
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
+#include <asm/io.h>
#include <asm/arch/bits.h>
#include <asm/arch/omap2420.h>
+#define TIMER_CLOCK (CONFIG_SYS_CLK_FREQ / (2 << CONFIG_SYS_PTV))
#define TIMER_LOAD_VAL 0
/* macro to read the 32 bit timer */
-#define READ_TIMER (*((volatile ulong *)(CONFIG_SYS_TIMERBASE+TCRR)))
+#define READ_TIMER readl(CONFIG_SYS_TIMERBASE+TCRR) \
+ / (TIMER_CLOCK / CONFIG_SYS_HZ)
-static ulong timestamp;
-static ulong lastinc;
+DECLARE_GLOBAL_DATA_PTR;
int timer_init (void)
{
val = (CONFIG_SYS_PTV << 2) | BIT5 | BIT1 | BIT0; /* mask to enable timer*/
*((int32_t *) (CONFIG_SYS_TIMERBASE + TCLR)) = val; /* start timer */
- reset_timer_masked(); /* init the timestamp and lastinc value */
+ /* reset time */
+ gd->arch.lastinc = READ_TIMER; /* capture current incrementer value */
+ gd->arch.tbl = 0; /* start "advancing" time stamp */
return(0);
}
/*
* timer without interrupts
*/
-void reset_timer (void)
-{
- reset_timer_masked ();
-}
-
ulong get_timer (ulong base)
{
return get_timer_masked () - base;
}
-void set_timer (ulong t)
-{
- timestamp = t;
-}
-
/* delay x useconds AND preserve advance timestamp value */
void __udelay (unsigned long usec)
{
}
tmp = get_timer (0); /* get current timestamp */
- if ( (tmo + tmp + 1) < tmp ) /* if setting this forward will roll time stamp */
- reset_timer_masked (); /* reset "advancing" timestamp to 0, set lastinc value */
- else
+ if ((tmo + tmp + 1) < tmp) { /* if setting this forward will roll */
+ /* time stamp, then reset time */
+ gd->arch.lastinc = READ_TIMER; /* capture incrementer value */
+ gd->arch.tbl = 0; /* start time stamp */
+ } else {
tmo += tmp; /* else, set advancing stamp wake up time */
+ }
while (get_timer_masked () < tmo)/* loop till event */
/*NOP*/;
}
-void reset_timer_masked (void)
-{
- /* reset time */
- lastinc = READ_TIMER; /* capture current incrementer value time */
- timestamp = 0; /* start "advancing" time stamp from 0 */
-}
-
ulong get_timer_masked (void)
{
ulong now = READ_TIMER; /* current tick value */
- if (now >= lastinc) /* normal mode (non roll) */
- timestamp += (now - lastinc); /* move stamp fordward with absoulte diff ticks */
- else /* we have rollover of incrementer */
- timestamp += (0xFFFFFFFF - lastinc) + now;
- lastinc = now;
- return timestamp;
+ if (now >= gd->arch.lastinc) { /* normal mode (non roll) */
+ /* move stamp fordward with absoulte diff ticks */
+ gd->arch.tbl += (now - gd->arch.lastinc);
+ } else {
+ /* we have rollover of incrementer */
+ gd->arch.tbl += ((0xFFFFFFFF / (TIMER_CLOCK / CONFIG_SYS_HZ))
+ - gd->arch.lastinc) + now;
+ }
+ gd->arch.lastinc = now;
+ return gd->arch.tbl;
}
/* waits specified delay value and resets timestamp */