/*
 * Copyright 2008, Realtek Semiconductor Corp.
 *
 * Tony Wu (tonywu@realtek.com)
 * Dec. 07, 2008
 */
#include <linux/clockchips.h>
#include <linux/init.h>
#include <linux/interrupt.h>

#include <asm/time.h>
#include "bspchip.h"
extern void bsp_timer_ack(void);

int ext_timer_state(void)
{
	return 0;
}

int ext_timer_set_base_clock(unsigned int hz)
{
	return 0;
}

static int ext_timer_set_next_event(unsigned long delta,
				 struct clock_event_device *evt)
{
	return -EINVAL;
}

static void ext_timer_set_mode(enum clock_event_mode mode,
			    struct clock_event_device *evt)
{
	return;
}

static void ext_timer_event_handler(struct clock_event_device *dev)
{
}



DEFINE_PER_CPU(struct clock_event_device, ext_clockevent_device);

static irqreturn_t ext_timer_interrupt(int irq, void *dev_id)
{
	struct clock_event_device *cd;
	
	cd = &per_cpu(ext_clockevent_device, smp_processor_id());
	int cpu = smp_processor_id();	

	/* Ack the RTC interrupt. */
	bsp_timer_ack();
	

#ifdef CONFIG_RTL8686_SHM_NOTIFY
    //printk("%d ", cpu);
#if 0	
    if (cpu == 0)
    {
        extern int aipc_shm_notify(void);
        aipc_shm_notify();
    }
#else
    {
        extern int aipc_shm_notify(void);
        aipc_shm_notify();
    }
#endif	
#endif

	cd->event_handler(cd);
	return IRQ_HANDLED;
}

static struct irqaction ext_irqaction = {
	.handler	= ext_timer_interrupt,
	.flags		= IRQF_TIMER | IRQF_PERCPU,
	.name		= "EXT_TIMER",
};

int ext_clockevent_init(void)
{
	unsigned int cpu = smp_processor_id();
	struct clock_event_device *cd;
	unsigned int irq;
	
	cd = &per_cpu(ext_clockevent_device, cpu);

        irq = BSP_TC0_IRQ + cpu;

	cd->name		= "EXT_TIMER";
	cd->features	= CLOCK_EVT_FEAT_PERIODIC;
	
	cd->event_handler	= ext_timer_event_handler;
	cd->set_next_event	= ext_timer_set_next_event;
	cd->set_mode	= ext_timer_set_mode;

	cd->rating = 100;
	cd->irq = irq;
	
	clockevent_set_clock(cd, 32768);
	cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd);
	cd->min_delta_ns = clockevent_delta2ns(0x300, cd);
	cd->cpumask = cpumask_of(cpu);
	
	clockevents_register_device(cd);

	setup_irq(irq, &ext_irqaction);
	irq_set_handler(irq, handle_percpu_irq);
	
	return 0;
}