static void mxc_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
unsigned long flags;
/*
* The timer interrupt generation is disabled at least
* for enough time to call mxc_set_next_event()
*/
local_irq_save(flags);
/* Disable interrupt in GPT module */
gpt_irq_disable();
if (mode != clockevent_mode) {
/* Set event time into far-far future */
if (timer_is_v2())
__raw_writel(__raw_readl(timer_base + V2_TCN) - 3,
timer_base + V2_TCMP);
else
__raw_writel(__raw_readl(timer_base + MX1_2_TCN) - 3,
timer_base + MX1_2_TCMP);
/* Clear pending interrupt */
gpt_irq_acknowledge();
}
#ifdef DEBUG
printk(KERN_INFO "mxc_set_mode: changing mode from %s to %s\n",
clock_event_mode_label[clockevent_mode],
clock_event_mode_label[mode]);
#endif /* DEBUG */
/* Remember timer mode */
clockevent_mode = mode;
local_irq_restore(flags);
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
printk(KERN_ERR"mxc_set_mode: Periodic mode is not "
"supported for i.MX\n");
break;
case CLOCK_EVT_MODE_ONESHOT:
/*
* Do not put overhead of interrupt enable/disable into
* mxc_set_next_event(), the core has about 4 minutes
* to call mxc_set_next_event() or shutdown clock after
* mode switching
*/
local_irq_save(flags);
gpt_irq_enable();
local_irq_restore(flags);
break;
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_RESUME:
/* Left event sources disabled, no more interrupts appear */
break;
}
}
static void mxc_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
unsigned long flags;
local_irq_save(flags);
gpt_irq_disable();
if (mode != clockevent_mode) {
if (cpu_is_mx3() || cpu_is_mx25())
__raw_writel(__raw_readl(timer_base + MX3_TCN) - 3,
timer_base + MX3_TCMP);
else
__raw_writel(__raw_readl(timer_base + MX1_2_TCN) - 3,
timer_base + MX1_2_TCMP);
gpt_irq_acknowledge();
}
#ifdef DEBUG
printk(KERN_INFO "mxc_set_mode: changing mode from %s to %s\n",
clock_event_mode_label[clockevent_mode],
clock_event_mode_label[mode]);
#endif
clockevent_mode = mode;
local_irq_restore(flags);
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
printk(KERN_ERR"mxc_set_mode: Periodic mode is not "
"supported for i.MX\n");
break;
case CLOCK_EVT_MODE_ONESHOT:
local_irq_save(flags);
gpt_irq_enable();
local_irq_restore(flags);
break;
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_RESUME:
break;
}
}
/*
* IRQ handler for the timer
*/
static irqreturn_t mxc_timer_interrupt(int irq, void *dev_id)
{
struct clock_event_device *evt = &clockevent_mxc;
uint32_t tstat;
tstat = __raw_readl(TIMER_BASE + MXC_TSTAT);
gpt_irq_acknowledge();
evt->event_handler(evt);
return IRQ_HANDLED;
}
/*
* IRQ handler for the timer
*/
static irqreturn_t mxc_timer_interrupt(int irq, void *dev_id)
{
struct clock_event_device *evt = &clockevent_mxc;
uint32_t tstat;
if (timer_is_v2())
tstat = __raw_readl(timer_base + V2_TSTAT);
else
tstat = __raw_readl(timer_base + MX1_2_TSTAT);
gpt_irq_acknowledge();
evt->event_handler(evt);
return IRQ_HANDLED;
}
/*
* IRQ handler for the timer
*/
static irqreturn_t mxc_timer_interrupt(int irq, void *dev_id)
{
struct clock_event_device *evt = &clockevent_mxc;
uint32_t tstat;
if (timer_is_v2())
tstat = __raw_readl(timer_base + V2_TSTAT);
else
tstat = __raw_readl(timer_base + MX1_2_TSTAT);
#ifndef CONFIG_IPIPE
gpt_irq_acknowledge();
#else /* !CONFIG_IPIPE */
__ipipe_tsc_update();
#endif /* !CONFIG_IPIPE */
evt->event_handler(evt);
return IRQ_HANDLED;
}
void __ipipe_mach_acktimer(void)
{
gpt_irq_acknowledge();
}