diff options
Diffstat (limited to 'arch/nds32/cpu/n1213/ag101/timer.c')
| -rw-r--r-- | arch/nds32/cpu/n1213/ag101/timer.c | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/arch/nds32/cpu/n1213/ag101/timer.c b/arch/nds32/cpu/n1213/ag101/timer.c deleted file mode 100644 index f6dcbf199c7..00000000000 --- a/arch/nds32/cpu/n1213/ag101/timer.c +++ /dev/null @@ -1,197 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * (C) Copyright 2009 Faraday Technology - * Po-Yu Chuang <ratbert@faraday-tech.com> - * - * Copyright (C) 2011 Andes Technology Corporation - * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com> - * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com> - */ -#ifndef CONFIG_TIMER -#include <common.h> -#include <clock_legacy.h> -#include <init.h> -#include <irq_func.h> -#include <log.h> -#include <time.h> -#include <asm/io.h> -#include <faraday/fttmr010.h> -#include <linux/delay.h> - -static ulong timestamp; -static ulong lastdec; - -int timer_init(void) -{ - struct fttmr010 *tmr = (struct fttmr010 *)CONFIG_FTTMR010_BASE; - unsigned int cr; - - debug("%s()\n", __func__); - - /* disable timers */ - writel(0, &tmr->cr); - -#ifdef CONFIG_FTTMR010_EXT_CLK - /* use 32768Hz oscillator for RTC, WDT, TIMER */ - ftpmu010_32768osc_enable(); -#endif - - /* setup timer */ - writel(TIMER_LOAD_VAL, &tmr->timer3_load); - writel(TIMER_LOAD_VAL, &tmr->timer3_counter); - writel(0, &tmr->timer3_match1); - writel(0, &tmr->timer3_match2); - - /* we don't want timer to issue interrupts */ - writel(FTTMR010_TM3_MATCH1 | - FTTMR010_TM3_MATCH2 | - FTTMR010_TM3_OVERFLOW, - &tmr->interrupt_mask); - - cr = readl(&tmr->cr); -#ifdef CONFIG_FTTMR010_EXT_CLK - cr |= FTTMR010_TM3_CLOCK; /* use external clock */ -#endif - cr |= FTTMR010_TM3_ENABLE; - writel(cr, &tmr->cr); - - /* init the timestamp and lastdec value */ - reset_timer_masked(); - - return 0; -} - -/* - * timer without interrupts - */ - -/* - * reset time - */ -void reset_timer_masked(void) -{ - struct fttmr010 *tmr = (struct fttmr010 *)CONFIG_FTTMR010_BASE; - - /* capure current decrementer value time */ -#ifdef CONFIG_FTTMR010_EXT_CLK - lastdec = readl(&tmr->timer3_counter) / (TIMER_CLOCK / CONFIG_SYS_HZ); -#else - lastdec = readl(&tmr->timer3_counter) / - (get_board_sys_clk() / 2 / CONFIG_SYS_HZ); -#endif - timestamp = 0; /* start "advancing" time stamp from 0 */ - - debug("%s(): lastdec = %lx\n", __func__, lastdec); -} - -void reset_timer(void) -{ - debug("%s()\n", __func__); - reset_timer_masked(); -} - -/* - * return timer ticks - */ -ulong get_timer_masked(void) -{ - struct fttmr010 *tmr = (struct fttmr010 *)CONFIG_FTTMR010_BASE; - - /* current tick value */ -#ifdef CONFIG_FTTMR010_EXT_CLK - ulong now = readl(&tmr->timer3_counter) / (TIMER_CLOCK / CONFIG_SYS_HZ); -#else - ulong now = readl(&tmr->timer3_counter) / - (get_board_sys_clk() / 2 / CONFIG_SYS_HZ); -#endif - - debug("%s(): now = %lx, lastdec = %lx\n", __func__, now, lastdec); - - if (lastdec >= now) { - /* - * normal mode (non roll) - * move stamp fordward with absoulte diff ticks - */ - timestamp += lastdec - now; - } else { - /* - * we have overflow of the count down timer - * - * nts = ts + ld + (TLV - now) - * ts=old stamp, ld=time that passed before passing through -1 - * (TLV-now) amount of time after passing though -1 - * nts = new "advancing time stamp"...it could also roll and - * cause problems. - */ - timestamp += lastdec + TIMER_LOAD_VAL - now; - } - - lastdec = now; - - debug("%s() returns %lx\n", __func__, timestamp); - - return timestamp; -} - -/* - * return difference between timer ticks and base - */ -ulong get_timer(ulong base) -{ - debug("%s(%lx)\n", __func__, base); - return get_timer_masked() - base; -} - -void set_timer(ulong t) -{ - debug("%s(%lx)\n", __func__, t); - timestamp = t; -} - -/* delay x useconds AND preserve advance timestamp value */ -void __udelay(unsigned long usec) -{ - struct fttmr010 *tmr = (struct fttmr010 *)CONFIG_FTTMR010_BASE; - -#ifdef CONFIG_FTTMR010_EXT_CLK - long tmo = usec * (TIMER_CLOCK / 1000) / 1000; -#else - long tmo = usec * ((get_board_sys_clk() / 2) / 1000) / 1000; -#endif - unsigned long now, last = readl(&tmr->timer3_counter); - - debug("%s(%lu)\n", __func__, usec); - while (tmo > 0) { - now = readl(&tmr->timer3_counter); - if (now > last) /* count down timer overflow */ - tmo -= TIMER_LOAD_VAL + last - now; - else - tmo -= last - now; - last = now; - } -} - -/* - * This function is derived from PowerPC code (read timebase as long long). - * On ARM it just returns the timer value. - */ -unsigned long long get_ticks(void) -{ - debug("%s()\n", __func__); - return get_timer(0); -} - -/* - * This function is derived from PowerPC code (timebase clock frequency). - * On ARM it returns the number of timer ticks per second. - */ -ulong get_tbclk(void) -{ - debug("%s()\n", __func__); -#ifdef CONFIG_FTTMR010_EXT_CLK - return CONFIG_SYS_HZ; -#else - return get_board_sys_clk(); -#endif -} -#endif /* CONFIG_TIMER */ |