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 1378acc472SPeter Tyser #ifndef CONFIG_WD_PERIOD 1478acc472SPeter Tyser # define CONFIG_WD_PERIOD (10 * 1000 * 1000) /* 10 seconds default */ 1578acc472SPeter Tyser #endif 1678acc472SPeter Tyser 178dfafddeSRob Herring DECLARE_GLOBAL_DATA_PTR; 188dfafddeSRob Herring 198dfafddeSRob Herring #ifdef CONFIG_SYS_TIMER_RATE 20fccacd3bSPavel Machek /* Returns tick rate in ticks per second */ 218dfafddeSRob Herring ulong notrace get_tbclk(void) 228dfafddeSRob Herring { 238dfafddeSRob Herring return CONFIG_SYS_TIMER_RATE; 248dfafddeSRob Herring } 258dfafddeSRob Herring #endif 268dfafddeSRob Herring 278dfafddeSRob Herring #ifdef CONFIG_SYS_TIMER_COUNTER 288dfafddeSRob Herring unsigned long notrace timer_read_counter(void) 298dfafddeSRob Herring { 308dfafddeSRob Herring #ifdef CONFIG_SYS_TIMER_COUNTS_DOWN 318dfafddeSRob Herring return ~readl(CONFIG_SYS_TIMER_COUNTER); 328dfafddeSRob Herring #else 338dfafddeSRob Herring return readl(CONFIG_SYS_TIMER_COUNTER); 348dfafddeSRob Herring #endif 358dfafddeSRob Herring } 368dfafddeSRob Herring #else 3765ba7addSRob Herring extern unsigned long __weak timer_read_counter(void); 388dfafddeSRob Herring #endif 398dfafddeSRob Herring 40*19ea4678SSimon Glass uint64_t __weak notrace get_ticks(void) 418dfafddeSRob Herring { 428dfafddeSRob Herring unsigned long now = timer_read_counter(); 438dfafddeSRob Herring 448dfafddeSRob Herring /* increment tbu if tbl has rolled over */ 458dfafddeSRob Herring if (now < gd->timebase_l) 468dfafddeSRob Herring gd->timebase_h++; 478dfafddeSRob Herring gd->timebase_l = now; 48*19ea4678SSimon Glass return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l; 498dfafddeSRob Herring } 508dfafddeSRob Herring 51fccacd3bSPavel Machek /* Returns time in milliseconds */ 52*19ea4678SSimon Glass static uint64_t notrace tick_to_time(uint64_t tick) 538dfafddeSRob Herring { 54fccacd3bSPavel Machek ulong div = get_tbclk(); 558dfafddeSRob Herring 568dfafddeSRob Herring tick *= CONFIG_SYS_HZ; 578dfafddeSRob Herring do_div(tick, div); 588dfafddeSRob Herring return tick; 598dfafddeSRob Herring } 608dfafddeSRob Herring 61de351d6bSDarwin Rambo int __weak timer_init(void) 62de351d6bSDarwin Rambo { 63de351d6bSDarwin Rambo return 0; 64de351d6bSDarwin Rambo } 65de351d6bSDarwin Rambo 66fccacd3bSPavel Machek /* Returns time in milliseconds */ 678dfafddeSRob Herring ulong __weak get_timer(ulong base) 688dfafddeSRob Herring { 698dfafddeSRob Herring return tick_to_time(get_ticks()) - base; 708dfafddeSRob Herring } 718dfafddeSRob Herring 728dfafddeSRob Herring unsigned long __weak notrace timer_get_us(void) 738dfafddeSRob Herring { 748dfafddeSRob Herring return tick_to_time(get_ticks() * 1000); 758dfafddeSRob Herring } 76fccacd3bSPavel Machek 77*19ea4678SSimon Glass static uint64_t usec_to_tick(unsigned long usec) 788dfafddeSRob Herring { 79*19ea4678SSimon Glass uint64_t tick = usec; 802cd1b572SStephen Warren tick *= get_tbclk(); 818dfafddeSRob Herring do_div(tick, 1000000); 828dfafddeSRob Herring return tick; 838dfafddeSRob Herring } 848dfafddeSRob Herring 858dfafddeSRob Herring void __weak __udelay(unsigned long usec) 868dfafddeSRob Herring { 87*19ea4678SSimon Glass uint64_t tmp; 888dfafddeSRob Herring 89fccacd3bSPavel Machek tmp = get_ticks() + usec_to_tick(usec); /* get current timestamp */ 908dfafddeSRob Herring 91fccacd3bSPavel Machek while (get_ticks() < tmp+1) /* loop till event */ 928dfafddeSRob Herring /*NOP*/; 938dfafddeSRob Herring } 948dfafddeSRob Herring 9578acc472SPeter Tyser /* ------------------------------------------------------------------------- */ 9678acc472SPeter Tyser 9778acc472SPeter Tyser void udelay(unsigned long usec) 9878acc472SPeter Tyser { 9978acc472SPeter Tyser ulong kv; 10078acc472SPeter Tyser 10178acc472SPeter Tyser do { 10278acc472SPeter Tyser WATCHDOG_RESET(); 10378acc472SPeter Tyser kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec; 10478acc472SPeter Tyser __udelay (kv); 10578acc472SPeter Tyser usec -= kv; 10678acc472SPeter Tyser } while(usec); 10778acc472SPeter Tyser } 108c4c9fbebSAnatolij Gustschin 109c4c9fbebSAnatolij Gustschin void mdelay(unsigned long msec) 110c4c9fbebSAnatolij Gustschin { 111c4c9fbebSAnatolij Gustschin while (msec--) 112c4c9fbebSAnatolij Gustschin udelay(1000); 113c4c9fbebSAnatolij Gustschin } 114