|
@@ -1,136 +0,0 @@
|
|
|
-/*
|
|
|
- * (C) Copyright 2004
|
|
|
- * Texas Instruments
|
|
|
- * Richard Woodruff <r-woodruff2@ti.com>
|
|
|
- *
|
|
|
- * (C) Copyright 2002
|
|
|
- * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
|
- * Marius Groeger <mgroeger@sysgo.de>
|
|
|
- * Alex Zuepke <azu@sysgo.de>
|
|
|
- *
|
|
|
- * (C) Copyright 2002
|
|
|
- * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
|
|
|
- *
|
|
|
- * 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 readl(CONFIG_SYS_TIMERBASE+TCRR) \
|
|
|
- / (TIMER_CLOCK / CONFIG_SYS_HZ)
|
|
|
-
|
|
|
-DECLARE_GLOBAL_DATA_PTR;
|
|
|
-
|
|
|
-int timer_init (void)
|
|
|
-{
|
|
|
- int32_t val;
|
|
|
-
|
|
|
- /* Start the counter ticking up */
|
|
|
- *((int32_t *) (CONFIG_SYS_TIMERBASE + TLDR)) = TIMER_LOAD_VAL; /* reload value on overflow*/
|
|
|
- val = (CONFIG_SYS_PTV << 2) | BIT5 | BIT1 | BIT0; /* mask to enable timer*/
|
|
|
- *((int32_t *) (CONFIG_SYS_TIMERBASE + TCLR)) = val; /* start timer */
|
|
|
-
|
|
|
- /* reset time */
|
|
|
- gd->arch.lastinc = READ_TIMER; /* capture current incrementer value */
|
|
|
- gd->arch.tbl = 0; /* start "advancing" time stamp */
|
|
|
-
|
|
|
- return(0);
|
|
|
-}
|
|
|
-/*
|
|
|
- * timer without interrupts
|
|
|
- */
|
|
|
-ulong get_timer (ulong base)
|
|
|
-{
|
|
|
- return get_timer_masked () - base;
|
|
|
-}
|
|
|
-
|
|
|
-/* delay x useconds AND preserve advance timestamp value */
|
|
|
-void __udelay (unsigned long usec)
|
|
|
-{
|
|
|
- ulong tmo, tmp;
|
|
|
-
|
|
|
- if (usec >= 1000) { /* if "big" number, spread normalization to seconds */
|
|
|
- tmo = usec / 1000; /* start to normalize for usec to ticks per sec */
|
|
|
- tmo *= CONFIG_SYS_HZ; /* find number of "ticks" to wait to achieve target */
|
|
|
- tmo /= 1000; /* finish normalize. */
|
|
|
- } else { /* else small number, don't kill it prior to HZ multiply */
|
|
|
- tmo = usec * CONFIG_SYS_HZ;
|
|
|
- tmo /= (1000*1000);
|
|
|
- }
|
|
|
-
|
|
|
- tmp = get_timer (0); /* get current timestamp */
|
|
|
- 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*/;
|
|
|
-}
|
|
|
-
|
|
|
-ulong get_timer_masked (void)
|
|
|
-{
|
|
|
- ulong now = READ_TIMER; /* current tick value */
|
|
|
-
|
|
|
- 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 */
|
|
|
-void udelay_masked (unsigned long usec)
|
|
|
-{
|
|
|
- ulong tmo;
|
|
|
- ulong endtime;
|
|
|
- signed long diff;
|
|
|
-
|
|
|
- if (usec >= 1000) { /* if "big" number, spread normalization to seconds */
|
|
|
- tmo = usec / 1000; /* start to normalize for usec to ticks per sec */
|
|
|
- tmo *= CONFIG_SYS_HZ; /* find number of "ticks" to wait to achieve target */
|
|
|
- tmo /= 1000; /* finish normalize. */
|
|
|
- } else { /* else small number, don't kill it prior to HZ multiply */
|
|
|
- tmo = usec * CONFIG_SYS_HZ;
|
|
|
- tmo /= (1000*1000);
|
|
|
- }
|
|
|
- endtime = get_timer_masked () + tmo;
|
|
|
-
|
|
|
- do {
|
|
|
- ulong now = get_timer_masked ();
|
|
|
- diff = endtime - now;
|
|
|
- } while (diff >= 0);
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * This function is derived from PowerPC code (read timebase as long long).
|
|
|
- * On ARM it just returns the timer value.
|
|
|
- */
|
|
|
-unsigned long long get_ticks(void)
|
|
|
-{
|
|
|
- return get_timer(0);
|
|
|
-}
|
|
|
-/*
|
|
|
- * This function is derived from PowerPC code (timebase clock frequency).
|
|
|
- * On ARM it returns the number of timer ticks per second.
|
|
|
- */
|
|
|
-ulong get_tbclk (void)
|
|
|
-{
|
|
|
- ulong tbclk;
|
|
|
- tbclk = CONFIG_SYS_HZ;
|
|
|
- return tbclk;
|
|
|
-}
|