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> 9c8a7ba9eSThomas Chou #include <dm.h> 10c8a7ba9eSThomas Chou #include <errno.h> 11c8a7ba9eSThomas Chou #include <timer.h> 1278acc472SPeter Tyser #include <watchdog.h> 138dfafddeSRob Herring #include <div64.h> 148dfafddeSRob Herring #include <asm/io.h> 1578acc472SPeter Tyser 1678acc472SPeter Tyser #ifndef CONFIG_WD_PERIOD 1778acc472SPeter Tyser # define CONFIG_WD_PERIOD (10 * 1000 * 1000) /* 10 seconds default */ 1878acc472SPeter Tyser #endif 1978acc472SPeter Tyser 208dfafddeSRob Herring DECLARE_GLOBAL_DATA_PTR; 218dfafddeSRob Herring 228dfafddeSRob Herring #ifdef CONFIG_SYS_TIMER_RATE 23fccacd3bSPavel Machek /* Returns tick rate in ticks per second */ 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 } 39*9fb34b01SSimon Glass 40*9fb34b01SSimon Glass ulong timer_get_boot_us(void) 41*9fb34b01SSimon Glass { 42*9fb34b01SSimon Glass ulong count = timer_read_counter(); 43*9fb34b01SSimon Glass 44*9fb34b01SSimon Glass #if CONFIG_SYS_TIMER_RATE == 1000000 45*9fb34b01SSimon Glass return count; 46*9fb34b01SSimon Glass #elif CONFIG_SYS_TIMER_RATE > 1000000 47*9fb34b01SSimon Glass return lldiv(count, CONFIG_SYS_TIMER_RATE / 1000000); 48*9fb34b01SSimon Glass #elif defined(CONFIG_SYS_TIMER_RATE) 49*9fb34b01SSimon Glass return (unsigned long long)count * 1000000 / CONFIG_SYS_TIMER_RATE; 50*9fb34b01SSimon Glass #else 51*9fb34b01SSimon Glass /* Assume the counter is in microseconds */ 52*9fb34b01SSimon Glass return count; 53*9fb34b01SSimon Glass #endif 54*9fb34b01SSimon Glass } 55*9fb34b01SSimon Glass 568dfafddeSRob Herring #else 5765ba7addSRob Herring extern unsigned long __weak timer_read_counter(void); 588dfafddeSRob Herring #endif 598dfafddeSRob Herring 60c8a7ba9eSThomas Chou #ifdef CONFIG_TIMER 61c8a7ba9eSThomas Chou ulong notrace get_tbclk(void) 62c8a7ba9eSThomas Chou { 63c95fec31SSimon Glass if (!gd->timer) { 64c95fec31SSimon Glass #ifdef CONFIG_TIMER_EARLY 65c95fec31SSimon Glass return timer_early_get_rate(); 66c95fec31SSimon Glass #else 67c8a7ba9eSThomas Chou int ret; 68c8a7ba9eSThomas Chou 69c8a7ba9eSThomas Chou ret = dm_timer_init(); 70c8a7ba9eSThomas Chou if (ret) 71c8a7ba9eSThomas Chou return ret; 72c95fec31SSimon Glass #endif 73c95fec31SSimon Glass } 74c8a7ba9eSThomas Chou 75c8a7ba9eSThomas Chou return timer_get_rate(gd->timer); 76c8a7ba9eSThomas Chou } 77c8a7ba9eSThomas Chou 789ca07ebbSBin Meng uint64_t notrace get_ticks(void) 79c8a7ba9eSThomas Chou { 809ca07ebbSBin Meng u64 count; 81c8a7ba9eSThomas Chou int ret; 82c8a7ba9eSThomas Chou 83c95fec31SSimon Glass if (!gd->timer) { 84c95fec31SSimon Glass #ifdef CONFIG_TIMER_EARLY 85c95fec31SSimon Glass return timer_early_get_count(); 86c95fec31SSimon Glass #else 87c95fec31SSimon Glass int ret; 88c95fec31SSimon Glass 89c8a7ba9eSThomas Chou ret = dm_timer_init(); 90c8a7ba9eSThomas Chou if (ret) 91c8a7ba9eSThomas Chou return ret; 92c95fec31SSimon Glass #endif 93c95fec31SSimon Glass } 94c8a7ba9eSThomas Chou 95c8a7ba9eSThomas Chou ret = timer_get_count(gd->timer, &count); 96c8a7ba9eSThomas Chou if (ret) 97c8a7ba9eSThomas Chou return ret; 98c8a7ba9eSThomas Chou 99c8a7ba9eSThomas Chou return count; 100c8a7ba9eSThomas Chou } 1019ca07ebbSBin Meng 1029ca07ebbSBin Meng #else /* !CONFIG_TIMER */ 103c8a7ba9eSThomas Chou 10419ea4678SSimon Glass uint64_t __weak notrace get_ticks(void) 1058dfafddeSRob Herring { 1068dfafddeSRob Herring unsigned long now = timer_read_counter(); 1078dfafddeSRob Herring 1088dfafddeSRob Herring /* increment tbu if tbl has rolled over */ 1098dfafddeSRob Herring if (now < gd->timebase_l) 1108dfafddeSRob Herring gd->timebase_h++; 1118dfafddeSRob Herring gd->timebase_l = now; 11219ea4678SSimon Glass return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l; 1138dfafddeSRob Herring } 1148dfafddeSRob Herring 1159ca07ebbSBin Meng #endif /* CONFIG_TIMER */ 1169ca07ebbSBin Meng 117fccacd3bSPavel Machek /* Returns time in milliseconds */ 11819ea4678SSimon Glass static uint64_t notrace tick_to_time(uint64_t tick) 1198dfafddeSRob Herring { 120fccacd3bSPavel Machek ulong div = get_tbclk(); 1218dfafddeSRob Herring 1228dfafddeSRob Herring tick *= CONFIG_SYS_HZ; 1238dfafddeSRob Herring do_div(tick, div); 1248dfafddeSRob Herring return tick; 1258dfafddeSRob Herring } 1268dfafddeSRob Herring 127de351d6bSDarwin Rambo int __weak timer_init(void) 128de351d6bSDarwin Rambo { 129de351d6bSDarwin Rambo return 0; 130de351d6bSDarwin Rambo } 131de351d6bSDarwin Rambo 132fccacd3bSPavel Machek /* Returns time in milliseconds */ 1338dfafddeSRob Herring ulong __weak get_timer(ulong base) 1348dfafddeSRob Herring { 1358dfafddeSRob Herring return tick_to_time(get_ticks()) - base; 1368dfafddeSRob Herring } 1378dfafddeSRob Herring 1388dfafddeSRob Herring unsigned long __weak notrace timer_get_us(void) 1398dfafddeSRob Herring { 1408dfafddeSRob Herring return tick_to_time(get_ticks() * 1000); 1418dfafddeSRob Herring } 142fccacd3bSPavel Machek 14319ea4678SSimon Glass static uint64_t usec_to_tick(unsigned long usec) 1448dfafddeSRob Herring { 14519ea4678SSimon Glass uint64_t tick = usec; 1462cd1b572SStephen Warren tick *= get_tbclk(); 1478dfafddeSRob Herring do_div(tick, 1000000); 1488dfafddeSRob Herring return tick; 1498dfafddeSRob Herring } 1508dfafddeSRob Herring 1518dfafddeSRob Herring void __weak __udelay(unsigned long usec) 1528dfafddeSRob Herring { 15319ea4678SSimon Glass uint64_t tmp; 1548dfafddeSRob Herring 155fccacd3bSPavel Machek tmp = get_ticks() + usec_to_tick(usec); /* get current timestamp */ 1568dfafddeSRob Herring 157fccacd3bSPavel Machek while (get_ticks() < tmp+1) /* loop till event */ 1588dfafddeSRob Herring /*NOP*/; 1598dfafddeSRob Herring } 1608dfafddeSRob Herring 16178acc472SPeter Tyser /* ------------------------------------------------------------------------- */ 16278acc472SPeter Tyser 16378acc472SPeter Tyser void udelay(unsigned long usec) 16478acc472SPeter Tyser { 16578acc472SPeter Tyser ulong kv; 16678acc472SPeter Tyser 16778acc472SPeter Tyser do { 16878acc472SPeter Tyser WATCHDOG_RESET(); 16978acc472SPeter Tyser kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec; 17078acc472SPeter Tyser __udelay (kv); 17178acc472SPeter Tyser usec -= kv; 17278acc472SPeter Tyser } while(usec); 17378acc472SPeter Tyser } 174