178acc472SPeter Tyser /* 278acc472SPeter Tyser * (C) Copyright 2000-2009 378acc472SPeter Tyser * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 478acc472SPeter Tyser * 51a459660SWolfgang Denk * SPDX-License-Identifier: GPL-2.0+ 678acc472SPeter Tyser */ 778acc472SPeter Tyser 878acc472SPeter Tyser #include <common.h> 978acc472SPeter Tyser #include <watchdog.h> 10*8dfafddeSRob Herring #include <div64.h> 11*8dfafddeSRob Herring #include <asm/io.h> 1278acc472SPeter Tyser 132108f4c4SRob Herring #if CONFIG_SYS_HZ != 1000 142108f4c4SRob Herring #warning "CONFIG_SYS_HZ must be 1000 and should not be defined by platforms" 152108f4c4SRob Herring #endif 162108f4c4SRob Herring 1778acc472SPeter Tyser #ifndef CONFIG_WD_PERIOD 1878acc472SPeter Tyser # define CONFIG_WD_PERIOD (10 * 1000 * 1000) /* 10 seconds default*/ 1978acc472SPeter Tyser #endif 2078acc472SPeter Tyser 21*8dfafddeSRob Herring DECLARE_GLOBAL_DATA_PTR; 22*8dfafddeSRob Herring 23*8dfafddeSRob Herring #ifdef CONFIG_SYS_TIMER_RATE 24*8dfafddeSRob Herring ulong notrace get_tbclk(void) 25*8dfafddeSRob Herring { 26*8dfafddeSRob Herring return CONFIG_SYS_TIMER_RATE; 27*8dfafddeSRob Herring } 28*8dfafddeSRob Herring #endif 29*8dfafddeSRob Herring 30*8dfafddeSRob Herring #ifdef CONFIG_SYS_TIMER_COUNTER 31*8dfafddeSRob Herring unsigned long notrace timer_read_counter(void) 32*8dfafddeSRob Herring { 33*8dfafddeSRob Herring #ifdef CONFIG_SYS_TIMER_COUNTS_DOWN 34*8dfafddeSRob Herring return ~readl(CONFIG_SYS_TIMER_COUNTER); 35*8dfafddeSRob Herring #else 36*8dfafddeSRob Herring return readl(CONFIG_SYS_TIMER_COUNTER); 37*8dfafddeSRob Herring #endif 38*8dfafddeSRob Herring } 39*8dfafddeSRob Herring #else 40*8dfafddeSRob Herring extern unsigned long timer_read_counter(void); 41*8dfafddeSRob Herring #endif 42*8dfafddeSRob Herring 43*8dfafddeSRob Herring unsigned long long __weak notrace get_ticks(void) 44*8dfafddeSRob Herring { 45*8dfafddeSRob Herring unsigned long now = timer_read_counter(); 46*8dfafddeSRob Herring 47*8dfafddeSRob Herring /* increment tbu if tbl has rolled over */ 48*8dfafddeSRob Herring if (now < gd->timebase_l) 49*8dfafddeSRob Herring gd->timebase_h++; 50*8dfafddeSRob Herring gd->timebase_l = now; 51*8dfafddeSRob Herring return ((unsigned long long)gd->timebase_h << 32) | gd->timebase_l; 52*8dfafddeSRob Herring } 53*8dfafddeSRob Herring 54*8dfafddeSRob Herring static unsigned long long notrace tick_to_time(unsigned long long tick) 55*8dfafddeSRob Herring { 56*8dfafddeSRob Herring unsigned int div = get_tbclk(); 57*8dfafddeSRob Herring 58*8dfafddeSRob Herring tick *= CONFIG_SYS_HZ; 59*8dfafddeSRob Herring do_div(tick, div); 60*8dfafddeSRob Herring return tick; 61*8dfafddeSRob Herring } 62*8dfafddeSRob Herring 63*8dfafddeSRob Herring ulong __weak get_timer(ulong base) 64*8dfafddeSRob Herring { 65*8dfafddeSRob Herring return tick_to_time(get_ticks()) - base; 66*8dfafddeSRob Herring } 67*8dfafddeSRob Herring 68*8dfafddeSRob Herring unsigned long __weak notrace timer_get_us(void) 69*8dfafddeSRob Herring { 70*8dfafddeSRob Herring return tick_to_time(get_ticks() * 1000); 71*8dfafddeSRob Herring } 72*8dfafddeSRob Herring static unsigned long long usec_to_tick(unsigned long usec) 73*8dfafddeSRob Herring { 74*8dfafddeSRob Herring unsigned long long tick = usec * get_tbclk(); 75*8dfafddeSRob Herring usec *= get_tbclk(); 76*8dfafddeSRob Herring do_div(tick, 1000000); 77*8dfafddeSRob Herring return tick; 78*8dfafddeSRob Herring } 79*8dfafddeSRob Herring 80*8dfafddeSRob Herring void __weak __udelay(unsigned long usec) 81*8dfafddeSRob Herring { 82*8dfafddeSRob Herring unsigned long long tmp; 83*8dfafddeSRob Herring ulong tmo; 84*8dfafddeSRob Herring 85*8dfafddeSRob Herring tmo = usec_to_tick(usec); 86*8dfafddeSRob Herring tmp = get_ticks() + tmo; /* get current timestamp */ 87*8dfafddeSRob Herring 88*8dfafddeSRob Herring while (get_ticks() < tmp) /* loop till event */ 89*8dfafddeSRob Herring /*NOP*/; 90*8dfafddeSRob Herring } 91*8dfafddeSRob Herring 9278acc472SPeter Tyser /* ------------------------------------------------------------------------- */ 9378acc472SPeter Tyser 9478acc472SPeter Tyser void udelay(unsigned long usec) 9578acc472SPeter Tyser { 9678acc472SPeter Tyser ulong kv; 9778acc472SPeter Tyser 9878acc472SPeter Tyser do { 9978acc472SPeter Tyser WATCHDOG_RESET(); 10078acc472SPeter Tyser kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec; 10178acc472SPeter Tyser __udelay (kv); 10278acc472SPeter Tyser usec -= kv; 10378acc472SPeter Tyser } while(usec); 10478acc472SPeter Tyser } 105c4c9fbebSAnatolij Gustschin 106c4c9fbebSAnatolij Gustschin void mdelay(unsigned long msec) 107c4c9fbebSAnatolij Gustschin { 108c4c9fbebSAnatolij Gustschin while (msec--) 109c4c9fbebSAnatolij Gustschin udelay(1000); 110c4c9fbebSAnatolij Gustschin } 111