diff options
Diffstat (limited to 'lib_m68k/time.c')
| -rw-r--r-- | lib_m68k/time.c | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/lib_m68k/time.c b/lib_m68k/time.c deleted file mode 100644 index 7eaea5e..0000000 --- a/lib_m68k/time.c +++ /dev/null @@ -1,227 +0,0 @@ -/* - * (C) Copyright 2003 Josef Baumgartner <josef.baumgartner@telex.de> - * - * (C) Copyright 2000 - * Wolfgang Denk, DENX Software Engineering, wd@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 <asm/timer.h> -#include <asm/immap.h> -#include <watchdog.h> - -DECLARE_GLOBAL_DATA_PTR; - -static volatile ulong timestamp = 0; - -#ifndef CONFIG_SYS_WATCHDOG_FREQ -#define CONFIG_SYS_WATCHDOG_FREQ (CONFIG_SYS_HZ / 2) -#endif - -#if defined(CONFIG_MCFTMR) -#ifndef CONFIG_SYS_UDELAY_BASE -# error "uDelay base not defined!" -#endif - -#if !defined(CONFIG_SYS_TMR_BASE) || !defined(CONFIG_SYS_INTR_BASE) || !defined(CONFIG_SYS_TMRINTR_NO) || !defined(CONFIG_SYS_TMRINTR_MASK) -# error "TMR_BASE, INTR_BASE, TMRINTR_NO or TMRINTR_MASk not defined!" -#endif -extern void dtimer_intr_setup(void); - -void __udelay(unsigned long usec) -{ - volatile dtmr_t *timerp = (dtmr_t *) (CONFIG_SYS_UDELAY_BASE); - uint start, now, tmp; - - while (usec > 0) { - if (usec > 65000) - tmp = 65000; - else - tmp = usec; - usec = usec - tmp; - - /* Set up TIMER 3 as timebase clock */ - timerp->tmr = DTIM_DTMR_RST_RST; - timerp->tcn = 0; - /* set period to 1 us */ - timerp->tmr = - CONFIG_SYS_TIMER_PRESCALER | DTIM_DTMR_CLK_DIV1 | DTIM_DTMR_FRR | - DTIM_DTMR_RST_EN; - - start = now = timerp->tcn; - while (now < start + tmp) - now = timerp->tcn; - } -} - -void dtimer_interrupt(void *not_used) -{ - volatile dtmr_t *timerp = (dtmr_t *) (CONFIG_SYS_TMR_BASE); - - /* check for timer interrupt asserted */ - if ((CONFIG_SYS_TMRPND_REG & CONFIG_SYS_TMRINTR_MASK) == CONFIG_SYS_TMRINTR_PEND) { - timerp->ter = (DTIM_DTER_CAP | DTIM_DTER_REF); - timestamp++; - - #if defined(CONFIG_WATCHDOG) || defined (CONFIG_HW_WATCHDOG) - if ((timestamp % (CONFIG_SYS_WATCHDOG_FREQ)) == 0) { - WATCHDOG_RESET (); - } - #endif /* CONFIG_WATCHDOG || CONFIG_HW_WATCHDOG */ - return; - } -} - -void timer_init(void) -{ - volatile dtmr_t *timerp = (dtmr_t *) (CONFIG_SYS_TMR_BASE); - - timestamp = 0; - - timerp->tcn = 0; - timerp->trr = 0; - - /* Set up TIMER 4 as clock */ - timerp->tmr = DTIM_DTMR_RST_RST; - - /* initialize and enable timer interrupt */ - irq_install_handler(CONFIG_SYS_TMRINTR_NO, dtimer_interrupt, 0); - - timerp->tcn = 0; - timerp->trr = 1000; /* Interrupt every ms */ - - dtimer_intr_setup(); - - /* set a period of 1us, set timer mode to restart and enable timer and interrupt */ - timerp->tmr = CONFIG_SYS_TIMER_PRESCALER | DTIM_DTMR_CLK_DIV1 | - DTIM_DTMR_FRR | DTIM_DTMR_ORRI | DTIM_DTMR_RST_EN; -} - -void reset_timer(void) -{ - timestamp = 0; -} - -ulong get_timer(ulong base) -{ - return (timestamp - base); -} - -void set_timer(ulong t) -{ - timestamp = t; -} -#endif /* CONFIG_MCFTMR */ - -#if defined(CONFIG_MCFPIT) -#if !defined(CONFIG_SYS_PIT_BASE) -# error "CONFIG_SYS_PIT_BASE not defined!" -#endif - -static unsigned short lastinc; - -void __udelay(unsigned long usec) -{ - volatile pit_t *timerp = (pit_t *) (CONFIG_SYS_UDELAY_BASE); - uint tmp; - - while (usec > 0) { - if (usec > 65000) - tmp = 65000; - else - tmp = usec; - usec = usec - tmp; - - /* Set up TIMER 3 as timebase clock */ - timerp->pcsr = PIT_PCSR_OVW; - timerp->pmr = 0; - /* set period to 1 us */ - timerp->pcsr |= PIT_PCSR_PRE(CONFIG_SYS_PIT_PRESCALE) | PIT_PCSR_EN; - - timerp->pmr = tmp; - while (timerp->pcntr > 0) ; - } -} - -void timer_init(void) -{ - volatile pit_t *timerp = (pit_t *) (CONFIG_SYS_PIT_BASE); - timestamp = 0; - - /* Set up TIMER 4 as poll clock */ - timerp->pcsr = PIT_PCSR_OVW; - timerp->pmr = lastinc = 0; - timerp->pcsr |= PIT_PCSR_PRE(CONFIG_SYS_PIT_PRESCALE) | PIT_PCSR_EN; -} - -void set_timer(ulong t) -{ - volatile pit_t *timerp = (pit_t *) (CONFIG_SYS_PIT_BASE); - - timestamp = 0; - timerp->pmr = lastinc = 0; -} - -ulong get_timer(ulong base) -{ - unsigned short now, diff; - volatile pit_t *timerp = (pit_t *) (CONFIG_SYS_PIT_BASE); - - now = timerp->pcntr; - diff = -(now - lastinc); - - timestamp += diff; - lastinc = now; - return timestamp - base; -} - -void wait_ticks(unsigned long ticks) -{ - set_timer(0); - while (get_timer(0) < ticks) ; -} -#endif /* CONFIG_MCFPIT */ - -/* - * This function is derived from PowerPC code (read timebase as long long). - * On M68K it just returns the timer value. - */ -unsigned long long get_ticks(void) -{ - return get_timer(0); -} - -unsigned long usec2ticks(unsigned long usec) -{ - return get_timer(usec); -} - -/* - * This function is derived from PowerPC code (timebase clock frequency). - * On M68K it returns the number of timer ticks per second. - */ -ulong get_tbclk(void) -{ - ulong tbclk; - tbclk = CONFIG_SYS_HZ; - return tbclk; -} |