static bool_t ce_init(struct clockevent_t * ce)
{
struct clockevent_pdata_t * pdat = (struct clockevent_pdata_t *)ce->priv;
clockevent_calc_mult_shift(ce, arm64_timer_frequecy(), 10);
ce->min_delta_ns = clockevent_delta2ns(ce, 0x1);
ce->max_delta_ns = clockevent_delta2ns(ce, 0xffffffff);
if(!request_irq(pdat->irq, ce_interrupt, IRQ_TYPE_NONE, ce))
return FALSE;
arm64_timer_interrupt_disable();
return TRUE;
}
static bool_t s5p4418_ce_init(struct clockevent_t * ce)
{
u64_t rate;
s5p4418_timer_reset();
if(!request_irq("TIMER0", s5p4418_ce_interrupt, IRQ_TYPE_NONE, ce))
{
LOG("can't request irq 'TIMER0'");
return FALSE;
}
/* 9.375MHZ - 107ns */
s5p4418_timer_enable(CE_TIMER_CHANNEL, 1);
rate = s5p4418_timer_calc_tin(CE_TIMER_CHANNEL, 107);
clockevent_calc_mult_shift(ce, rate, 10);
ce->min_delta_ns = clockevent_delta2ns(ce, 0x1);
ce->max_delta_ns = clockevent_delta2ns(ce, 0xffffffff);
s5p4418_timer_count(CE_TIMER_CHANNEL, 0);
s5p4418_timer_stop(CE_TIMER_CHANNEL);
return TRUE;
}
static struct device_t * ce_samsung_timer_probe(struct driver_t * drv, struct dtnode_t * n)
{
struct ce_samsung_timer_pdata_t * pdat;
struct clockevent_t * ce;
struct device_t * dev;
virtual_addr_t virt = phys_to_virt(dt_read_address(n));
char * clk = dt_read_string(n, "clock-name", NULL);
int irq = dt_read_int(n, "interrupt", -1);
int channel = dt_read_int(n, "timer-channel", -1);
u64_t rate;
if(!search_clk(clk))
return NULL;
if(!irq_is_valid(irq))
return NULL;
if(channel < 0 || channel > 3)
return NULL;
pdat = malloc(sizeof(struct ce_samsung_timer_pdata_t));
if(!pdat)
return NULL;
ce = malloc(sizeof(struct clockevent_t));
if(!ce)
{
free(pdat);
return NULL;
}
pdat->virt = virt;
pdat->clk = strdup(clk);
pdat->irq = irq;
pdat->channel = channel;
clk_enable(pdat->clk);
rate = samsung_timer_calc_tin(pdat->virt, pdat->clk, pdat->channel, 107);
clockevent_calc_mult_shift(ce, rate, 10);
ce->name = alloc_device_name(dt_read_name(n), -1);
ce->min_delta_ns = clockevent_delta2ns(ce, 0x1);
ce->max_delta_ns = clockevent_delta2ns(ce, 0xffffffff);
ce->next = ce_samsung_timer_next,
ce->priv = pdat;
if(!request_irq(pdat->irq, ce_samsung_timer_interrupt, IRQ_TYPE_NONE, ce))
{
clk_disable(pdat->clk);
free(pdat->clk);
free(ce->priv);
free(ce);
return NULL;
}
samsung_timer_enable(pdat->virt, pdat->channel, 1);
samsung_timer_count(pdat->virt, pdat->channel, 0);
samsung_timer_stop(pdat->virt, pdat->channel);
if(!register_clockevent(&dev, ce))
{
samsung_timer_irq_clear(pdat->virt, pdat->channel);
samsung_timer_stop(pdat->virt, pdat->channel);
samsung_timer_disable(pdat->virt, pdat->channel);
clk_disable(pdat->clk);
free_irq(pdat->irq);
free(pdat->clk);
free_device_name(ce->name);
free(ce->priv);
free(ce);
return NULL;
}
dev->driver = drv;
return dev;
}