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author | Peter Tyser <ptyser@xes-inc.com> | 2010-04-12 22:28:11 -0500 |
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committer | Wolfgang Denk <wd@denx.de> | 2010-04-13 09:13:24 +0200 |
commit | 84ad688473bec2875e171b71040eb9e033c6c206 (patch) | |
tree | cf181129cbdf5d833d55262f759ea2cd9cafaff7 /cpu/arm920t/ep93xx/timer.c | |
parent | 8f0fec74ac6d0f3a7134ccebafa1ed9bd8c712ba (diff) | |
download | blackbird-obmc-uboot-84ad688473bec2875e171b71040eb9e033c6c206.tar.gz blackbird-obmc-uboot-84ad688473bec2875e171b71040eb9e033c6c206.zip |
arm: Move cpu/$CPU to arch/arm/cpu/$CPU
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'cpu/arm920t/ep93xx/timer.c')
-rw-r--r-- | cpu/arm920t/ep93xx/timer.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/cpu/arm920t/ep93xx/timer.c b/cpu/arm920t/ep93xx/timer.c deleted file mode 100644 index 4a0ce4da64..0000000000 --- a/cpu/arm920t/ep93xx/timer.c +++ /dev/null @@ -1,143 +0,0 @@ -/* - * Cirrus Logic EP93xx timer support. - * - * Copyright (C) 2009, 2010 Matthias Kaehlcke <matthias@kaehlcke.net> - * - * Copyright (C) 2004, 2005 - * Cory T. Tusar, Videon Central, Inc., <ctusar@videon-central.com> - * - * Based on the original intr.c Cirrus Logic EP93xx Rev D. interrupt support, - * author unknown. - * - * 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., - * 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <common.h> -#include <linux/types.h> -#include <asm/arch/ep93xx.h> -#include <asm/io.h> -#include <div64.h> - -#define TIMER_CLKSEL (1 << 3) -#define TIMER_ENABLE (1 << 7) - -#define TIMER_FREQ 508469 /* ticks / second */ -#define TIMER_MAX_VAL 0xFFFFFFFF - -static struct ep93xx_timer -{ - unsigned long long ticks; - unsigned long last_read; -} timer; - -static inline unsigned long long usecs_to_ticks(unsigned long usecs) -{ - unsigned long long ticks = (unsigned long long)usecs * TIMER_FREQ; - do_div(ticks, 1000 * 1000); - - return ticks; -} - -static inline void read_timer(void) -{ - struct timer_regs *timer_regs = (struct timer_regs *)TIMER_BASE; - const unsigned long now = TIMER_MAX_VAL - readl(&timer_regs->timer3.value); - - if (now >= timer.last_read) - timer.ticks += now - timer.last_read; - else - /* an overflow occurred */ - timer.ticks += TIMER_MAX_VAL - timer.last_read + now; - - timer.last_read = now; -} - -/* - * Get the number of ticks (in CONFIG_SYS_HZ resolution) - */ -unsigned long long get_ticks(void) -{ - unsigned long long sys_ticks; - - read_timer(); - - sys_ticks = timer.ticks * CONFIG_SYS_HZ; - do_div(sys_ticks, TIMER_FREQ); - - return sys_ticks; -} - -unsigned long get_timer_masked(void) -{ - return get_ticks(); -} - -unsigned long get_timer(unsigned long base) -{ - return get_timer_masked() - base; -} - -void reset_timer_masked(void) -{ - read_timer(); - timer.ticks = 0; -} - -void reset_timer(void) -{ - reset_timer_masked(); -} - -void __udelay(unsigned long usec) -{ - unsigned long long target; - - read_timer(); - - target = timer.ticks + usecs_to_ticks(usec); - - while (timer.ticks < target) - read_timer(); -} - -int timer_init(void) -{ - struct timer_regs *timer_regs = (struct timer_regs *)TIMER_BASE; - - /* use timer 3 with 508KHz and free running, not enabled now */ - writel(TIMER_CLKSEL, &timer_regs->timer3.control); - - /* set initial timer value */ - writel(TIMER_MAX_VAL, &timer_regs->timer3.load); - - /* Enable the timer */ - writel(TIMER_ENABLE | TIMER_CLKSEL, - &timer_regs->timer3.control); - - reset_timer_masked(); - - return 0; -} - -/* - * This function is derived from PowerPC code (timebase clock frequency). - * On ARM it returns the number of timer ticks per second. - */ -unsigned long get_tbclk(void) -{ - return CONFIG_SYS_HZ; -} |