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Diffstat (limited to 'cpu/arm926ejs/davinci/timer.c')
-rw-r--r-- | cpu/arm926ejs/davinci/timer.c | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/cpu/arm926ejs/davinci/timer.c b/cpu/arm926ejs/davinci/timer.c deleted file mode 100644 index 9da7443..0000000 --- a/cpu/arm926ejs/davinci/timer.c +++ /dev/null @@ -1,149 +0,0 @@ -/* - * (C) Copyright 2003 - * Texas Instruments <www.ti.com> - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Marius Groeger <mgroeger@sysgo.de> - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Alex Zuepke <azu@sysgo.de> - * - * (C) Copyright 2002-2004 - * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> - * - * (C) Copyright 2004 - * Philippe Robin, ARM Ltd. <philippe.robin@arm.com> - * - * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net> - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include <common.h> -#include <asm/io.h> - -struct davinci_timer { - u_int32_t pid12; - u_int32_t emumgt; - u_int32_t na1; - u_int32_t na2; - u_int32_t tim12; - u_int32_t tim34; - u_int32_t prd12; - u_int32_t prd34; - u_int32_t tcr; - u_int32_t tgcr; - u_int32_t wdtcr; -}; - -static struct davinci_timer * const timer = - (struct davinci_timer *)CONFIG_SYS_TIMERBASE; - -#define TIMER_LOAD_VAL (CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ) -#define TIM_CLK_DIV 16 - -static ulong timestamp; -static ulong lastinc; - -int timer_init(void) -{ - /* We are using timer34 in unchained 32-bit mode, full speed */ - writel(0x0, &timer->tcr); - writel(0x0, &timer->tgcr); - writel(0x06 | ((TIM_CLK_DIV - 1) << 8), &timer->tgcr); - writel(0x0, &timer->tim34); - writel(TIMER_LOAD_VAL, &timer->prd34); - lastinc = 0; - timestamp = 0; - writel(2 << 22, &timer->tcr); - - return(0); -} - -void reset_timer(void) -{ - writel(0x0, &timer->tcr); - writel(0x0, &timer->tim34); - lastinc = 0; - timestamp = 0; - writel(2 << 22, &timer->tcr); -} - -static ulong get_timer_raw(void) -{ - ulong now = readl(&timer->tim34); - - if (now >= lastinc) { - /* normal mode */ - timestamp += now - lastinc; - } else { - /* overflow ... */ - timestamp += now + TIMER_LOAD_VAL - lastinc; - } - lastinc = now; - return timestamp; -} - -ulong get_timer(ulong base) -{ - return((get_timer_raw() / (TIMER_LOAD_VAL / TIM_CLK_DIV)) - base); -} - -void set_timer(ulong t) -{ - timestamp = t; -} - -void __udelay(unsigned long usec) -{ - ulong tmo; - ulong endtime; - signed long diff; - - tmo = CONFIG_SYS_HZ_CLOCK / 1000; - tmo *= usec; - tmo /= (1000 * TIM_CLK_DIV); - - endtime = get_timer_raw() + tmo; - - do { - ulong now = get_timer_raw(); - diff = endtime - now; - } while (diff >= 0); -} - -/* - * 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; -} |