diff options
Diffstat (limited to 'arch/arm/cpu/armv7/omap-common/timer.c')
-rw-r--r-- | arch/arm/cpu/armv7/omap-common/timer.c | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/timer.c b/arch/arm/cpu/armv7/omap-common/timer.c deleted file mode 100644 index 49e3a971d9..0000000000 --- a/arch/arm/cpu/armv7/omap-common/timer.c +++ /dev/null @@ -1,103 +0,0 @@ -/* - * (C) Copyright 2008 - * Texas Instruments - * - * Richard Woodruff <r-woodruff2@ti.com> - * Syed Moahmmed Khasim <khasim@ti.com> - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Marius Groeger <mgroeger@sysgo.de> - * Alex Zuepke <azu@sysgo.de> - * - * (C) Copyright 2002 - * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <asm/io.h> -#include <asm/arch/cpu.h> -#include <asm/arch/clock.h> - -DECLARE_GLOBAL_DATA_PTR; - -static struct gptimer *timer_base = (struct gptimer *)CONFIG_SYS_TIMERBASE; - -/* - * Nothing really to do with interrupts, just starts up a counter. - */ - -#define TIMER_CLOCK (V_SCLK / (2 << CONFIG_SYS_PTV)) -#define TIMER_OVERFLOW_VAL 0xffffffff -#define TIMER_LOAD_VAL 0 - -int timer_init(void) -{ - /* start the counter ticking up, reload value on overflow */ - writel(TIMER_LOAD_VAL, &timer_base->tldr); - /* enable timer */ - writel((CONFIG_SYS_PTV << 2) | TCLR_PRE | TCLR_AR | TCLR_ST, - &timer_base->tclr); - - return 0; -} - -/* - * timer without interrupts - */ -ulong get_timer(ulong base) -{ - return get_timer_masked() - base; -} - -/* delay x useconds */ -void __udelay(unsigned long usec) -{ - long tmo = usec * (TIMER_CLOCK / 1000) / 1000; - unsigned long now, last = readl(&timer_base->tcrr); - - while (tmo > 0) { - now = readl(&timer_base->tcrr); - if (last > now) /* count up timer overflow */ - tmo -= TIMER_OVERFLOW_VAL - last + now + 1; - else - tmo -= now - last; - last = now; - } -} - -ulong get_timer_masked(void) -{ - /* current tick value */ - ulong now = readl(&timer_base->tcrr) / (TIMER_CLOCK / CONFIG_SYS_HZ); - - if (now >= gd->arch.lastinc) { /* normal mode (non roll) */ - /* move stamp fordward with absoulte diff ticks */ - gd->arch.tbl += (now - gd->arch.lastinc); - } else { /* we have rollover of incrementer */ - gd->arch.tbl += ((TIMER_OVERFLOW_VAL / (TIMER_CLOCK / - CONFIG_SYS_HZ)) - gd->arch.lastinc) + now; - } - gd->arch.lastinc = now; - return gd->arch.tbl; -} - -/* - * 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) -{ - 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) -{ - return CONFIG_SYS_HZ; -} |