diff options
Diffstat (limited to 'arch/arm/cpu/lh7a40x/timer.c')
| -rw-r--r-- | arch/arm/cpu/lh7a40x/timer.c | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/arch/arm/cpu/lh7a40x/timer.c b/arch/arm/cpu/lh7a40x/timer.c deleted file mode 100644 index 58b35b1..0000000 --- a/arch/arm/cpu/lh7a40x/timer.c +++ /dev/null @@ -1,182 +0,0 @@ -/* - * (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 - * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> - * - * 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 <lh7a40x.h> - -static ulong timer_load_val = 0; - -/* macro to read the 16 bit timer */ -static inline ulong READ_TIMER(void) -{ - lh7a40x_timers_t* timers = LH7A40X_TIMERS_PTR; - lh7a40x_timer_t* timer = &timers->timer1; - - return (timer->value & 0x0000ffff); -} - -static ulong timestamp; -static ulong lastdec; - -int timer_init (void) -{ - lh7a40x_timers_t* timers = LH7A40X_TIMERS_PTR; - lh7a40x_timer_t* timer = &timers->timer1; - - /* a periodic timer using the 508kHz source */ - timer->control = (TIMER_PER | TIMER_CLK508K); - - if (timer_load_val == 0) { - /* - * 10ms period with 508.469kHz clock = 5084 - */ - timer_load_val = CONFIG_SYS_HZ/100; - } - - /* load value for 10 ms timeout */ - lastdec = timer->load = timer_load_val; - - /* auto load, start timer */ - timer->control = timer->control | TIMER_EN; - timestamp = 0; - - return (0); -} - -/* - * timer without interrupts - */ -ulong get_timer (ulong base) -{ - return (get_timer_masked() - base); -} - -void __udelay (unsigned long usec) -{ - ulong tmo,tmp; - - /* normalize */ - if (usec >= 1000) { - tmo = usec / 1000; - tmo *= CONFIG_SYS_HZ; - tmo /= 1000; - } - else { - if (usec > 1) { - tmo = usec * CONFIG_SYS_HZ; - tmo /= (1000*1000); - } - else - tmo = 1; - } - - /* check for rollover during this delay */ - tmp = get_timer (0); - if ((tmp + tmo) < tmp ) - reset_timer_masked(); /* timer would roll over */ - else - tmo += tmp; - - while (get_timer_masked () < tmo); -} - -void reset_timer_masked (void) -{ - /* reset time */ - lastdec = READ_TIMER(); - timestamp = 0; -} - -ulong get_timer_masked (void) -{ - ulong now = READ_TIMER(); - - if (lastdec >= now) { - /* normal mode */ - timestamp += (lastdec - now); - } else { - /* we have an overflow ... */ - timestamp += ((lastdec + timer_load_val) - now); - } - lastdec = now; - - return timestamp; -} - -void udelay_masked (unsigned long usec) -{ - ulong tmo; - ulong endtime; - signed long diff; - - /* normalize */ - if (usec >= 1000) { - tmo = usec / 1000; - tmo *= CONFIG_SYS_HZ; - tmo /= 1000; - } else { - if (usec > 1) { - tmo = usec * CONFIG_SYS_HZ; - tmo /= (1000*1000); - } else { - tmo = 1; - } - } - - endtime = get_timer_masked () + tmo; - - do { - ulong now = get_timer_masked (); - 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) -{ - ulong tbclk; - - tbclk = timer_load_val * 100; - - return tbclk; -} |