mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
173 lines
3.0 KiB
C
173 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2000-2009
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <timer.h>
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#include <watchdog.h>
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#include <div64.h>
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#include <asm/io.h>
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#ifndef CONFIG_WD_PERIOD
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# define CONFIG_WD_PERIOD (10 * 1000 * 1000) /* 10 seconds default */
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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#ifdef CONFIG_SYS_TIMER_RATE
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/* Returns tick rate in ticks per second */
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ulong notrace get_tbclk(void)
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{
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return CONFIG_SYS_TIMER_RATE;
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}
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#endif
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#ifdef CONFIG_SYS_TIMER_COUNTER
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unsigned long notrace timer_read_counter(void)
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{
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#ifdef CONFIG_SYS_TIMER_COUNTS_DOWN
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return ~readl(CONFIG_SYS_TIMER_COUNTER);
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#else
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return readl(CONFIG_SYS_TIMER_COUNTER);
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#endif
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}
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ulong timer_get_boot_us(void)
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{
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ulong count = timer_read_counter();
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#if CONFIG_SYS_TIMER_RATE == 1000000
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return count;
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#elif CONFIG_SYS_TIMER_RATE > 1000000
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return lldiv(count, CONFIG_SYS_TIMER_RATE / 1000000);
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#elif defined(CONFIG_SYS_TIMER_RATE)
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return (unsigned long long)count * 1000000 / CONFIG_SYS_TIMER_RATE;
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#else
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/* Assume the counter is in microseconds */
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return count;
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#endif
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}
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#else
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extern unsigned long __weak timer_read_counter(void);
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#endif
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#ifdef CONFIG_TIMER
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ulong notrace get_tbclk(void)
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{
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if (!gd->timer) {
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#ifdef CONFIG_TIMER_EARLY
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return timer_early_get_rate();
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#else
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int ret;
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ret = dm_timer_init();
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if (ret)
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return ret;
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#endif
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}
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return timer_get_rate(gd->timer);
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}
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uint64_t notrace get_ticks(void)
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{
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u64 count;
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int ret;
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if (!gd->timer) {
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#ifdef CONFIG_TIMER_EARLY
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return timer_early_get_count();
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#else
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int ret;
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ret = dm_timer_init();
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if (ret)
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return ret;
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#endif
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}
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ret = timer_get_count(gd->timer, &count);
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if (ret)
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return ret;
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return count;
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}
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#else /* !CONFIG_TIMER */
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uint64_t __weak notrace get_ticks(void)
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{
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unsigned long now = timer_read_counter();
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/* increment tbu if tbl has rolled over */
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if (now < gd->timebase_l)
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gd->timebase_h++;
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gd->timebase_l = now;
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return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l;
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}
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#endif /* CONFIG_TIMER */
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/* Returns time in milliseconds */
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static uint64_t notrace tick_to_time(uint64_t tick)
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{
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ulong div = get_tbclk();
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tick *= CONFIG_SYS_HZ;
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do_div(tick, div);
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return tick;
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}
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int __weak timer_init(void)
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{
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return 0;
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}
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/* Returns time in milliseconds */
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ulong __weak get_timer(ulong base)
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{
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return tick_to_time(get_ticks()) - base;
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}
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unsigned long __weak notrace timer_get_us(void)
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{
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return tick_to_time(get_ticks() * 1000);
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}
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static uint64_t usec_to_tick(unsigned long usec)
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{
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uint64_t tick = usec;
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tick *= get_tbclk();
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do_div(tick, 1000000);
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return tick;
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}
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void __weak __udelay(unsigned long usec)
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{
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uint64_t tmp;
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tmp = get_ticks() + usec_to_tick(usec); /* get current timestamp */
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while (get_ticks() < tmp+1) /* loop till event */
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/*NOP*/;
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}
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/* ------------------------------------------------------------------------- */
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void udelay(unsigned long usec)
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{
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ulong kv;
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do {
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WATCHDOG_RESET();
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kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec;
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__udelay (kv);
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usec -= kv;
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} while(usec);
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}
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