diff options
Diffstat (limited to 'target/linux/coldfire/files-2.6.31/arch/m68k/coldfire/common/time.c')
-rw-r--r-- | target/linux/coldfire/files-2.6.31/arch/m68k/coldfire/common/time.c | 318 |
1 files changed, 0 insertions, 318 deletions
diff --git a/target/linux/coldfire/files-2.6.31/arch/m68k/coldfire/common/time.c b/target/linux/coldfire/files-2.6.31/arch/m68k/coldfire/common/time.c deleted file mode 100644 index a858ce0930..0000000000 --- a/target/linux/coldfire/files-2.6.31/arch/m68k/coldfire/common/time.c +++ /dev/null @@ -1,318 +0,0 @@ -/* - * linux/arch/m68k/coldfire/time.c - * - * This file contains the coldfire specific time handling pieces. - * - * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved. - * Kurt Mahan <kmahan@freescale.com> - * Jason Jin Jason.Jin@freescale.com - * Shrek Wu B16972@freescale.com - * - * based on linux/arch/m68k/kernel/time.c - */ -#include <linux/clk.h> -#include <linux/clk.h> -#include <linux/clocksource.h> -#include <linux/clockchips.h> -#include <linux/time.h> -#include <linux/timex.h> -#include <linux/errno.h> -#include <linux/module.h> -#include <linux/sysdev.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/param.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/rtc.h> - -#include <asm/machdep.h> -#include <linux/io.h> -#include <asm/irq_regs.h> - -#include <linux/profile.h> -#include <asm/mcfsim.h> -#ifdef CONFIG_GENERIC_CLOCKEVENTS -/*extern unsigned long long sys_dtim0_read(void); -extern void sys_dtim_init(void);*/ -extern unsigned long long sys_dtim2_read(void); -extern void sys_dtim2_init(void); -static int cfv4_set_next_event(unsigned long evt, - struct clock_event_device *dev); -static void cfv4_set_mode(enum clock_event_mode mode, - struct clock_event_device *dev); -#if defined(CONFIG_M5445X) -#define FREQ (MCF_BUSCLK / 16) -#else -#define FREQ (MCF_BUSCLK) -#endif -/* - * realtime clock dummy code - */ - -static unsigned long null_rtc_get_time(void) -{ - return mktime(2008, 1, 1, 0, 0, 0); -} - -static int null_rtc_set_time(unsigned long sec) -{ - return 0; -} - -static unsigned long (*cf_rtc_get_time)(void) = null_rtc_get_time; -static int (*cf_rtc_set_time)(unsigned long) = null_rtc_set_time; -#endif /* CONFIG_GENERIC_CLOCKEVENTS */ - -/* - * old pre-GENERIC clock code - */ - -#ifndef CONFIG_GENERIC_CLOCKEVENTS -/* - * timer_interrupt() needs to keep up the real-time clock, - * as well as call the "do_timer()" routine every clocktick - */ -static irqreturn_t timer_interrupt(int irq, void *dummy) -{ -#ifdef CONFIG_COLDFIRE - /* kick hardware timer if necessary */ - if (mach_tick) - mach_tick(); -#endif - do_timer(1); -#ifndef CONFIG_SMP - update_process_times(user_mode(get_irq_regs())); -#endif - profile_tick(CPU_PROFILING); - -#ifdef CONFIG_HEARTBEAT - /* use power LED as a heartbeat instead -- much more useful - for debugging -- based on the version for PReP by Cort */ - /* acts like an actual heart beat -- ie thump-thump-pause... */ - if (mach_heartbeat) { - unsigned cnt = 0, period = 0, dist = 0; - - if (cnt == 0 || cnt == dist) - mach_heartbeat(1); - else if (cnt == 7 || cnt == dist+7) - mach_heartbeat(0); - - if (++cnt > period) { - cnt = 0; - /* The hyperbolic function below modifies - * the heartbeat period length in dependency - * of the current (5min) load. It goes through - * the points f(0)=126, f(1)=86, f(5)=51, - * f(inf)->30. */ - period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) - + 30; - dist = period / 4; - } - } -#endif /* CONFIG_HEARTBEAT */ - return IRQ_HANDLED; -} - -void __init time_init(void) -{ - struct rtc_time time; - - if (mach_hwclk) { - mach_hwclk(0, &time); - time.tm_year += 1900; - if (time.tm_year < 1970) - time.tm_year += 100; - xtime.tv_sec = mktime(time.tm_year, time.tm_mon, time.tm_mday, - time.tm_hour, time.tm_min, time.tm_sec); - xtime.tv_nsec = 0; - } - wall_to_monotonic.tv_sec = -xtime.tv_sec; - - mach_sched_init(timer_interrupt); -} -#endif /* !CONFIG_GENERIC_CLOCKEVENTS */ - -#ifndef CONFIG_GENERIC_TIME -/* - * This version of gettimeofday has near microsecond resolution. - */ -void do_gettimeofday(struct timeval *tv) -{ - unsigned long flags; - unsigned long seq; - unsigned long usec, sec; - unsigned long max_ntp_tick = tick_usec - tickadj; - - do { - seq = read_seqbegin_irqsave(&xtime_lock, flags); - - usec = mach_gettimeoffset(); - - /* - * If time_adjust is negative then NTP is slowing the clock - * so make sure not to go into next possible interval. - * Better to lose some accuracy than have time go backwards.. - */ - if (unlikely(time_adjust < 0)) - usec = min(usec, max_ntp_tick); - - sec = xtime.tv_sec; - usec += xtime.tv_nsec/1000; - } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); - - - while (usec >= 1000000) { - usec -= 1000000; - sec++; - } - - tv->tv_sec = sec; - tv->tv_usec = usec; -} -EXPORT_SYMBOL(do_gettimeofday); - -int do_settimeofday(struct timespec *tv) -{ - time_t wtm_sec, sec = tv->tv_sec; - long wtm_nsec, nsec = tv->tv_nsec; - - if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC) - return -EINVAL; - - write_seqlock_irq(&xtime_lock); - /* This is revolting. We need to set the xtime.tv_nsec - * correctly. However, the value in this location is - * is value at the last tick. - * Discover what correction gettimeofday - * would have done, and then undo it! - */ - nsec -= 1000 * mach_gettimeoffset(); - - wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec); - wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec); - - set_normalized_timespec(&xtime, sec, nsec); - set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec); - - ntp_clear(); - write_sequnlock_irq(&xtime_lock); - clock_was_set(); - return 0; -} -EXPORT_SYMBOL(do_settimeofday); -#endif /* !CONFIG_GENERIC_TIME */ - -#ifdef CONFIG_GENERIC_CLOCKEVENTS -/* - * Clock Evnt setup - */ -static struct clock_event_device clockevent_cfv4 = { - .name = "CFV4 timer2even", - .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, - .rating = 200, - .shift = 20, - .set_mode = cfv4_set_mode, - .set_next_event = cfv4_set_next_event, -}; - -static int cfv4_set_next_event(unsigned long evt, - struct clock_event_device *dev) -{ - return 0; -} - -static void cfv4_set_mode(enum clock_event_mode mode, - struct clock_event_device *dev) -{ - if (mode != CLOCK_EVT_MODE_ONESHOT) - cfv4_set_next_event((FREQ / HZ), dev); -} - -static int __init cfv4_clockevent_init(void) -{ - clockevent_cfv4.mult = - div_sc(FREQ, NSEC_PER_SEC, - clockevent_cfv4.shift); - clockevent_cfv4.max_delta_ns = - clockevent_delta2ns((FREQ / HZ), - &clockevent_cfv4); - clockevent_cfv4.min_delta_ns = - clockevent_delta2ns(1, &clockevent_cfv4); - - clockevent_cfv4.cpumask = &cpumask_of_cpu(0); - - printk(KERN_INFO "timer: register clockevent\n"); - clockevents_register_device(&clockevent_cfv4); - - return 0; -} - -/* - * clocksource setup - */ - -struct clocksource clocksource_cfv4 = { - .name = "ColdfireV4", - .rating = 250, - .mask = CLOCKSOURCE_MASK(32), - .read = sys_dtim2_read, - .shift = 20, - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; - -/* - * Initialize time subsystem. Called from linux/init/main.c - */ -void __init time_init(void) -{ - int ret; - - printk(KERN_INFO "Initializing time\n"); -#if 0 - /* initialize system clocks */ - clk_init(); -#endif - cfv4_clockevent_init(); - /* initialize the system timer */ - /*sys_dtim_init();*/ - sys_dtim2_init(); - /* setup initial system time */ - xtime.tv_sec = cf_rtc_get_time(); - xtime.tv_nsec = 0; - set_normalized_timespec(&wall_to_monotonic, -xtime.tv_sec, - -xtime.tv_nsec); - - /* JKM */ - clocksource_cfv4.mult = clocksource_hz2mult(FREQ, - clocksource_cfv4.shift); - - /* register our clocksource */ - ret = clocksource_register(&clocksource_cfv4); - if (ret) - printk(KERN_ERR "timer: unable to " - "register clocksource - %d\n", ret); -} - -/* - * sysfs pieces - */ - -static struct sysdev_class timer_class = { - .name = "timer", -}; - -static struct sys_device timer_device = { - .id = 0, - .cls = &timer_class, -}; - -static int __init timer_init_sysfs(void) -{ - int err = sysdev_class_register(&timer_class); - if (!err) - err = sysdev_register(&timer_device); - return err; -} -device_initcall(timer_init_sysfs); -#endif /* CONFIG_GENERIC_CLOCKEVENTS */ |