[people/ms/u-boot.git] / lib / time.c

/*
 * (C) Copyright 2000-2009
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <dm.h>
#include <errno.h>
#include <timer.h>
#include <watchdog.h>
#include <div64.h>
#include <asm/io.h>

#ifndef CONFIG_WD_PERIOD
# define CONFIG_WD_PERIOD	(10 * 1000 * 1000)	/* 10 seconds default */
#endif

DECLARE_GLOBAL_DATA_PTR;

#ifdef CONFIG_SYS_TIMER_RATE
/* Returns tick rate in ticks per second */
ulong notrace get_tbclk(void)
{
	return CONFIG_SYS_TIMER_RATE;
}
#endif

#ifdef CONFIG_SYS_TIMER_COUNTER
unsigned long notrace timer_read_counter(void)
{
#ifdef CONFIG_SYS_TIMER_COUNTS_DOWN
	return ~readl(CONFIG_SYS_TIMER_COUNTER);
#else
	return readl(CONFIG_SYS_TIMER_COUNTER);
#endif
}
#else
extern unsigned long __weak timer_read_counter(void);
#endif

#ifdef CONFIG_TIMER
ulong notrace get_tbclk(void)
{
	if (!gd->timer) {
#ifdef CONFIG_TIMER_EARLY
		return timer_early_get_rate();
#else
		int ret;

		ret = dm_timer_init();
		if (ret)
			return ret;
#endif
	}

	return timer_get_rate(gd->timer);
}

uint64_t notrace get_ticks(void)
{
	u64 count;
	int ret;

	if (!gd->timer) {
#ifdef CONFIG_TIMER_EARLY
		return timer_early_get_count();
#else
		int ret;

		ret = dm_timer_init();
		if (ret)
			return ret;
#endif
	}

	ret = timer_get_count(gd->timer, &count);
	if (ret)
		return ret;

	return count;
}

#else /* !CONFIG_TIMER */

uint64_t __weak notrace get_ticks(void)
{
	unsigned long now = timer_read_counter();

	/* increment tbu if tbl has rolled over */
	if (now < gd->timebase_l)
		gd->timebase_h++;
	gd->timebase_l = now;
	return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l;
}

#endif /* CONFIG_TIMER */

/* Returns time in milliseconds */
static uint64_t notrace tick_to_time(uint64_t tick)
{
	ulong div = get_tbclk();

	tick *= CONFIG_SYS_HZ;
	do_div(tick, div);
	return tick;
}

int __weak timer_init(void)
{
	return 0;
}

/* Returns time in milliseconds */
ulong __weak get_timer(ulong base)
{
	return tick_to_time(get_ticks()) - base;
}

unsigned long __weak notrace timer_get_us(void)
{
	return tick_to_time(get_ticks() * 1000);
}

static uint64_t usec_to_tick(unsigned long usec)
{
	uint64_t tick = usec;
	tick *= get_tbclk();
	do_div(tick, 1000000);
	return tick;
}

void __weak __udelay(unsigned long usec)
{
	uint64_t tmp;

	tmp = get_ticks() + usec_to_tick(usec);	/* get current timestamp */

	while (get_ticks() < tmp+1)	/* loop till event */
		 /*NOP*/;
}

/* ------------------------------------------------------------------------- */

void udelay(unsigned long usec)
{
	ulong kv;

	do {
		WATCHDOG_RESET();
		kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec;
		__udelay (kv);
		usec -= kv;
	} while(usec);
}
Commit	Line	Data
3eb90bad IL	1	/*
	2	* (C) Copyright 2000-2009
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
3eb90bad IL	6	*/
	7
	8	#include <common.h>
c8a7ba9e TC	9	#include <dm.h>
	10	#include <errno.h>
	11	#include <timer.h>
3eb90bad	12	#include <watchdog.h>
8dfafdde RH	13	#include <div64.h>
8dfafdde RH	14	#include <asm/io.h>
3eb90bad IL	15
3eb90bad IL	16	#ifndef CONFIG_WD_PERIOD
fccacd3b	17	# define CONFIG_WD_PERIOD (10 * 1000 * 1000) /* 10 seconds default */
3eb90bad IL	18	#endif
3eb90bad IL	19
8dfafdde RH	20	DECLARE_GLOBAL_DATA_PTR;
	21
	22	#ifdef CONFIG_SYS_TIMER_RATE
fccacd3b	23	/* Returns tick rate in ticks per second */
8dfafdde RH	24	ulong notrace get_tbclk(void)
	25	{
	26	return CONFIG_SYS_TIMER_RATE;
	27	}
	28	#endif
	29
	30	#ifdef CONFIG_SYS_TIMER_COUNTER
	31	unsigned long notrace timer_read_counter(void)
	32	{
	33	#ifdef CONFIG_SYS_TIMER_COUNTS_DOWN
	34	return ~readl(CONFIG_SYS_TIMER_COUNTER);
	35	#else
	36	return readl(CONFIG_SYS_TIMER_COUNTER);
	37	#endif
	38	}
	39	#else
65ba7add	40	extern unsigned long __weak timer_read_counter(void);
8dfafdde RH	41	#endif
8dfafdde RH	42
c8a7ba9e	43	#ifdef CONFIG_TIMER
c8a7ba9e TC	44	ulong notrace get_tbclk(void)
c8a7ba9e TC	45	{
c95fec31 SG	46	if (!gd->timer) {
	47	#ifdef CONFIG_TIMER_EARLY
	48	return timer_early_get_rate();
	49	#else
	50	int ret;
c8a7ba9e	51
c95fec31 SG	52	ret = dm_timer_init();
	53	if (ret)
	54	return ret;
	55	#endif
	56	}
c8a7ba9e TC	57
	58	return timer_get_rate(gd->timer);
	59	}
	60
9ca07ebb	61	uint64_t notrace get_ticks(void)
c8a7ba9e	62	{
9ca07ebb	63	u64 count;
c8a7ba9e TC	64	int ret;
c8a7ba9e TC	65
c95fec31 SG	66	if (!gd->timer) {
	67	#ifdef CONFIG_TIMER_EARLY
	68	return timer_early_get_count();
	69	#else
	70	int ret;
	71
	72	ret = dm_timer_init();
	73	if (ret)
	74	return ret;
	75	#endif
	76	}
c8a7ba9e TC	77
	78	ret = timer_get_count(gd->timer, &count);
	79	if (ret)
	80	return ret;
	81
	82	return count;
	83	}
9ca07ebb BM	84
9ca07ebb BM	85	#else /* !CONFIG_TIMER */
c8a7ba9e	86
19ea4678	87	uint64_t __weak notrace get_ticks(void)
8dfafdde RH	88	{
	89	unsigned long now = timer_read_counter();
	90
	91	/* increment tbu if tbl has rolled over */
	92	if (now < gd->timebase_l)
	93	gd->timebase_h++;
	94	gd->timebase_l = now;
19ea4678	95	return ((uint64_t)gd->timebase_h << 32) \| gd->timebase_l;
8dfafdde RH	96	}
8dfafdde RH	97
9ca07ebb BM	98	#endif /* CONFIG_TIMER */
9ca07ebb BM	99
fccacd3b	100	/* Returns time in milliseconds */
19ea4678	101	static uint64_t notrace tick_to_time(uint64_t tick)
8dfafdde	102	{
fccacd3b	103	ulong div = get_tbclk();
8dfafdde RH	104
	105	tick *= CONFIG_SYS_HZ;
	106	do_div(tick, div);
	107	return tick;
	108	}
	109
de351d6b DR	110	int __weak timer_init(void)
	111	{
	112	return 0;
	113	}
	114
fccacd3b	115	/* Returns time in milliseconds */
8dfafdde RH	116	ulong __weak get_timer(ulong base)
	117	{
	118	return tick_to_time(get_ticks()) - base;
	119	}
	120
	121	unsigned long __weak notrace timer_get_us(void)
	122	{
	123	return tick_to_time(get_ticks() * 1000);
	124	}
fccacd3b	125
19ea4678	126	static uint64_t usec_to_tick(unsigned long usec)
8dfafdde	127	{
19ea4678	128	uint64_t tick = usec;
2cd1b572	129	tick *= get_tbclk();
8dfafdde RH	130	do_div(tick, 1000000);
	131	return tick;
	132	}
	133
	134	void __weak __udelay(unsigned long usec)
	135	{
19ea4678	136	uint64_t tmp;
8dfafdde	137
fccacd3b	138	tmp = get_ticks() + usec_to_tick(usec); /* get current timestamp */
8dfafdde	139
fccacd3b	140	while (get_ticks() < tmp+1) /* loop till event */
8dfafdde RH	141	/NOP/;
	142	}
	143
3eb90bad IL	144	/* ------------------------------------------------------------------------- */
	145
	146	void udelay(unsigned long usec)
	147	{
	148	ulong kv;
	149
	150	do {
	151	WATCHDOG_RESET();
	152	kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec;
	153	__udelay (kv);
	154	usec -= kv;
	155	} while(usec);
	156	}