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> 108dfafddeSRob Herring #include <div64.h> 118dfafddeSRob 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 218dfafddeSRob Herring DECLARE_GLOBAL_DATA_PTR; 228dfafddeSRob Herring 238dfafddeSRob Herring #ifdef CONFIG_SYS_TIMER_RATE 248dfafddeSRob Herring ulong notrace get_tbclk(void) 258dfafddeSRob Herring { 268dfafddeSRob Herring return CONFIG_SYS_TIMER_RATE; 278dfafddeSRob Herring } 288dfafddeSRob Herring #endif 298dfafddeSRob Herring 308dfafddeSRob Herring #ifdef CONFIG_SYS_TIMER_COUNTER 318dfafddeSRob Herring unsigned long notrace timer_read_counter(void) 328dfafddeSRob Herring { 338dfafddeSRob Herring #ifdef CONFIG_SYS_TIMER_COUNTS_DOWN 348dfafddeSRob Herring return ~readl(CONFIG_SYS_TIMER_COUNTER); 358dfafddeSRob Herring #else 368dfafddeSRob Herring return readl(CONFIG_SYS_TIMER_COUNTER); 378dfafddeSRob Herring #endif 388dfafddeSRob Herring } 398dfafddeSRob Herring #else 4065ba7addSRob Herring extern unsigned long __weak timer_read_counter(void); 418dfafddeSRob Herring #endif 428dfafddeSRob Herring 438dfafddeSRob Herring unsigned long long __weak notrace get_ticks(void) 448dfafddeSRob Herring { 458dfafddeSRob Herring unsigned long now = timer_read_counter(); 468dfafddeSRob Herring 478dfafddeSRob Herring /* increment tbu if tbl has rolled over */ 488dfafddeSRob Herring if (now < gd->timebase_l) 498dfafddeSRob Herring gd->timebase_h++; 508dfafddeSRob Herring gd->timebase_l = now; 518dfafddeSRob Herring return ((unsigned long long)gd->timebase_h << 32) | gd->timebase_l; 528dfafddeSRob Herring } 538dfafddeSRob Herring 54d770f396SDaniel Schwierzeck static unsigned long long notrace tick_to_time(uint64_t tick) 558dfafddeSRob Herring { 568dfafddeSRob Herring unsigned int div = get_tbclk(); 578dfafddeSRob Herring 588dfafddeSRob Herring tick *= CONFIG_SYS_HZ; 598dfafddeSRob Herring do_div(tick, div); 608dfafddeSRob Herring return tick; 618dfafddeSRob Herring } 628dfafddeSRob Herring 638dfafddeSRob Herring ulong __weak get_timer(ulong base) 648dfafddeSRob Herring { 658dfafddeSRob Herring return tick_to_time(get_ticks()) - base; 668dfafddeSRob Herring } 678dfafddeSRob Herring 688dfafddeSRob Herring unsigned long __weak notrace timer_get_us(void) 698dfafddeSRob Herring { 708dfafddeSRob Herring return tick_to_time(get_ticks() * 1000); 718dfafddeSRob Herring } 728dfafddeSRob Herring static unsigned long long usec_to_tick(unsigned long usec) 738dfafddeSRob Herring { 74*2cd1b572SStephen Warren uint64_t tick = usec; 75*2cd1b572SStephen Warren tick *= get_tbclk(); 768dfafddeSRob Herring do_div(tick, 1000000); 778dfafddeSRob Herring return tick; 788dfafddeSRob Herring } 798dfafddeSRob Herring 808dfafddeSRob Herring void __weak __udelay(unsigned long usec) 818dfafddeSRob Herring { 828dfafddeSRob Herring unsigned long long tmp; 838dfafddeSRob Herring ulong tmo; 848dfafddeSRob Herring 858dfafddeSRob Herring tmo = usec_to_tick(usec); 868dfafddeSRob Herring tmp = get_ticks() + tmo; /* get current timestamp */ 878dfafddeSRob Herring 888dfafddeSRob Herring while (get_ticks() < tmp) /* loop till event */ 898dfafddeSRob Herring /*NOP*/; 908dfafddeSRob Herring } 918dfafddeSRob 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