2 * (C) Copyright 2000-2009
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
16 #ifndef CONFIG_WD_PERIOD
17 # define CONFIG_WD_PERIOD (10 * 1000 * 1000) /* 10 seconds default */
20 DECLARE_GLOBAL_DATA_PTR;
22 #ifdef CONFIG_SYS_TIMER_RATE
23 /* Returns tick rate in ticks per second */
24 ulong notrace get_tbclk(void)
26 return CONFIG_SYS_TIMER_RATE;
30 #ifdef CONFIG_SYS_TIMER_COUNTER
31 unsigned long notrace timer_read_counter(void)
33 #ifdef CONFIG_SYS_TIMER_COUNTS_DOWN
34 return ~readl(CONFIG_SYS_TIMER_COUNTER);
36 return readl(CONFIG_SYS_TIMER_COUNTER);
40 extern unsigned long __weak timer_read_counter(void);
44 static int notrace dm_timer_init(void)
50 ret = uclass_first_device(UCLASS_TIMER, &dev);
61 ulong notrace get_tbclk(void)
65 ret = dm_timer_init();
69 return timer_get_rate(gd->timer);
72 uint64_t notrace get_ticks(void)
77 ret = dm_timer_init();
81 ret = timer_get_count(gd->timer, &count);
88 #else /* !CONFIG_TIMER */
90 uint64_t __weak notrace get_ticks(void)
92 unsigned long now = timer_read_counter();
94 /* increment tbu if tbl has rolled over */
95 if (now < gd->timebase_l)
98 return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l;
101 #endif /* CONFIG_TIMER */
103 /* Returns time in milliseconds */
104 static uint64_t notrace tick_to_time(uint64_t tick)
106 ulong div = get_tbclk();
108 tick *= CONFIG_SYS_HZ;
113 int __weak timer_init(void)
118 /* Returns time in milliseconds */
119 ulong __weak get_timer(ulong base)
121 return tick_to_time(get_ticks()) - base;
124 unsigned long __weak notrace timer_get_us(void)
126 return tick_to_time(get_ticks() * 1000);
129 static uint64_t usec_to_tick(unsigned long usec)
131 uint64_t tick = usec;
133 do_div(tick, 1000000);
137 void __weak __udelay(unsigned long usec)
141 tmp = get_ticks() + usec_to_tick(usec); /* get current timestamp */
143 while (get_ticks() < tmp+1) /* loop till event */
147 /* ------------------------------------------------------------------------- */
149 void udelay(unsigned long usec)
155 kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec;
161 void mdelay(unsigned long msec)