diff options
Diffstat (limited to 'arch/arm/cpu/arm1136/omap24xx/timer.c')
| -rw-r--r-- | arch/arm/cpu/arm1136/omap24xx/timer.c | 136 | 
1 files changed, 0 insertions, 136 deletions
| diff --git a/arch/arm/cpu/arm1136/omap24xx/timer.c b/arch/arm/cpu/arm1136/omap24xx/timer.c deleted file mode 100644 index b1eef27da..000000000 --- a/arch/arm/cpu/arm1136/omap24xx/timer.c +++ /dev/null @@ -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; -} |