diff options
Diffstat (limited to 'target/linux/ubicom32/files/arch/ubicom32/kernel/timer_device.c')
| -rw-r--r-- | target/linux/ubicom32/files/arch/ubicom32/kernel/timer_device.c | 301 |
1 files changed, 0 insertions, 301 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/kernel/timer_device.c b/target/linux/ubicom32/files/arch/ubicom32/kernel/timer_device.c deleted file mode 100644 index 1943cbb9ee..0000000000 --- a/target/linux/ubicom32/files/arch/ubicom32/kernel/timer_device.c +++ /dev/null @@ -1,301 +0,0 @@ -/* - * arch/ubicom32/kernel/timer_device.c - * Implements a Ubicom32 clock device and event devices. - * - * (C) Copyright 2009, Ubicom, Inc. - * - * This file is part of the Ubicom32 Linux Kernel Port. - * - * The Ubicom32 Linux Kernel Port 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. - * - * The Ubicom32 Linux Kernel Port 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 the Ubicom32 Linux Kernel Port. If not, - * see <http://www.gnu.org/licenses/>. - * - * Ubicom32 implementation derived from (with many thanks): - * arch/m68knommu - * arch/blackfin - * arch/parisc - */ -#include <linux/types.h> -#include <linux/clockchips.h> -#include <linux/clocksource.h> -#include <linux/spinlock.h> -#include <asm/ip5000.h> -#include <asm/machdep.h> - -#if defined(CONFIG_SMP) -#include <asm/smp.h> -#endif - -#if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) -#define MAX_TIMERS (2 + CONFIG_TIMER_EXTRA_ALLOC) -#else -#define MAX_TIMERS (NR_CPUS + CONFIG_TIMER_EXTRA_ALLOC) -#endif - -#if (MAX_TIMERS > 10) -#error "Ubicom32 only has 10 timers" -#endif - -static unsigned int frequency; -static struct clock_event_device timer_device_devs[MAX_TIMERS]; -static struct irqaction timer_device_irqs[MAX_TIMERS]; -static int timer_device_next_timer = 0; - -DEFINE_SPINLOCK(timer_device_lock); - -/* - * timer_device_set_next_event() - * Cause the timer to go off "cycles" from now. - */ -static int timer_device_set_next_event(unsigned long cycles, struct clock_event_device *dev) -{ - timer_set(dev->irq, cycles); - return 0; -} - -/* - * timer_device_set_mode() - * Handle the mode switch for a clock event device. - */ -static void timer_device_set_mode(enum clock_event_mode mode, struct clock_event_device *dev) -{ - switch (mode) { - case CLOCK_EVT_MODE_SHUTDOWN: - /* - * Make sure the vector is disabled - * until the next event is set. - */ - printk(KERN_NOTICE "timer[%d]: shutdown\n", dev->irq); - ldsr_disable_vector(dev->irq); - break; - - case CLOCK_EVT_MODE_ONESHOT: - /* - * Make sure the vector is disabled - * until the next event is set. - */ - printk(KERN_NOTICE "timer[%d]: oneshot\n", dev->irq); - ldsr_disable_vector(dev->irq); - break; - - case CLOCK_EVT_MODE_PERIODIC: - /* - * The periodic request is 1 per jiffies - */ - printk(KERN_NOTICE "timer[%d]: periodic: %d cycles\n", - dev->irq, frequency / CONFIG_HZ); - timer_set(dev->irq, frequency / CONFIG_HZ); - break; - - case CLOCK_EVT_MODE_UNUSED: - case CLOCK_EVT_MODE_RESUME: - printk(KERN_WARNING "timer[%d]: unimplemented mode: %d\n", - dev->irq, mode); - break; - }; -} - -/* - * timer_device_event() - * Call the device's event handler. - * - * The pointer is initialized by the generic Linux code - * to the function to be called. - */ -static irqreturn_t timer_device_event(int irq, void *dev_id) -{ - struct clock_event_device *dev = (struct clock_event_device *)dev_id; - - if (dev->mode == CLOCK_EVT_MODE_PERIODIC) { - /* - * The periodic request is 1 per jiffies - */ - timer_reset(dev->irq, frequency / CONFIG_HZ); - } else { - /* - * The timer will go off again at the rollover - * point. We must disable the IRQ to prevent - * getting a spurious interrupt. - */ - ldsr_disable_vector(dev->irq); - } - - if (!dev->event_handler) { - printk(KERN_CRIT "no registered event handler\n"); - return IRQ_HANDLED; - } - - dev->event_handler(dev); - return IRQ_HANDLED; -} - -/* - * timer_device_clockbase_read() - * Provide a primary clocksource around the sysval timer. - */ -static cycle_t timer_device_clockbase_read(void) -{ - return (cycle_t)UBICOM32_IO_TIMER->sysval; -} - -/* - * Primary Clock Source Description - * - * We use 24 for the shift factor because we want - * to ensure there are less than 2^24 clocks - * in a jiffie of 10 ms. - */ -static struct clocksource timer_device_clockbase = { - .name = "sysval", - .rating = 400, - .flags = CLOCK_SOURCE_IS_CONTINUOUS, - .mask = CLOCKSOURCE_MASK(32), - .shift = 24, - .mult = 0, - .read = timer_device_clockbase_read, -}; - -/* - * timer_device_alloc_event() - * Allocate a timer device event. - */ -static int timer_device_alloc_event(const char *name, int cpuid, const struct cpumask *cpumask) -{ - struct clock_event_device *dev; - struct irqaction *action; - - /* - * Are we out of configured timers? - */ - spin_lock(&timer_device_lock); - if (timer_device_next_timer >= MAX_TIMERS) { - spin_unlock(&timer_device_lock); - printk(KERN_WARNING "out of timer event entries\n"); - return -1; - } - dev = &timer_device_devs[timer_device_next_timer]; - action = &timer_device_irqs[timer_device_next_timer]; - timer_device_next_timer++; - spin_unlock(&timer_device_lock); - - /* - * Now allocate a timer to ourselves. - */ - dev->irq = timer_alloc(); - if (dev->irq == -1) { - spin_lock(&timer_device_lock); - timer_device_next_timer--; - spin_unlock(&timer_device_lock); - printk(KERN_WARNING "out of hardware timers\n"); - return -1; - } - - /* - * Init the IRQ action structure. Make sure - * this in place before you register the clock - * event device. - */ - action->name = name; - action->flags = IRQF_DISABLED | IRQF_TIMER; - action->handler = timer_device_event; - //cpumask_copy(&action->mask, mask); - action->dev_id = dev; - setup_irq(dev->irq, action); - irq_set_affinity(dev->irq, cpumask); - ldsr_disable_vector(dev->irq); - - /* - * init clock dev structure. - * - * The min_delta_ns is chosen to ensure that setting next - * event will never be requested with too small of value. - */ - dev->name = name; - dev->rating = timer_device_clockbase.rating; - dev->shift = timer_device_clockbase.shift; - dev->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT; - dev->set_mode = timer_device_set_mode; - dev->set_next_event = timer_device_set_next_event; - dev->mult = div_sc(frequency, NSEC_PER_SEC, dev->shift); - dev->max_delta_ns = clockevent_delta2ns(0xffffffff, dev); - dev->min_delta_ns = clockevent_delta2ns(100, dev); - //dev->cpumask = mask; - printk(KERN_NOTICE "timer[%d]: %s - created\n", dev->irq, dev->name); - - /* - * Now register the device. - */ - clockevents_register_device(dev); - return dev->irq; -} - -#if defined(CONFIG_LOCAL_TIMERS) -/* - * local_timer_setup() - * Allocation function for creating a per cpu local timer. - */ -int __cpuinit local_timer_setup(unsigned int cpu) -{ - return timer_device_alloc_event("timer-cpu", cpu); -} -#endif - -/* - * timer_device_init() - * Create and init a generic clock driver for Ubicom32. - */ -void timer_device_init(void) -{ - int i; - - /* - * Get the frequency from the processor device tree node or use - * the default if not available. We will store this as the frequency - * of the timer to avoid future calculations. - */ - frequency = processor_frequency(); - if (frequency == 0) { - frequency = CLOCK_TICK_RATE; - } - - /* - * Setup the primary clock source around sysval. Linux does not - * supply a Mhz multiplier so convert down to khz. - */ - timer_device_clockbase.mult = - clocksource_khz2mult(frequency / 1000, - timer_device_clockbase.shift); - if (clocksource_register(&timer_device_clockbase)) { - printk(KERN_ERR "timer: clocksource failed to register\n"); - return; - } - - /* - * Always allocate a primary timer. - */ - timer_device_alloc_event("timer-primary", -1, cpu_all_mask); - -#if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) - /* - * If BROADCAST is selected we need to add a broadcast timer. - */ - timer_device_alloc_event("timer-broadcast", -1, cpu_all_mask); -#endif - - /* - * Allocate extra timers that are requested. - */ - for (i = 0; i < CONFIG_TIMER_EXTRA_ALLOC; i++) { - timer_device_alloc_event("timer-extra", -1, cpu_all_mask); - } -} |