int __hw_clock_source_init(uint32_t start_t)
{
/* Set the reload and current value. */
GR_TIMEHS_BGLOAD(0, 1) = 0xffffffff;
GR_TIMEHS_LOAD(0, 1) = 0xffffffff;
/* HW Timer enabled, periodic, interrupt enabled, 32-bit, wrapping */
GR_TIMEHS_CONTROL(0, 1) = 0xe2;
/* Event timer disabled */
__hw_clock_event_clear();
/* Account for the clock speed. */
update_prescaler();
/* Clear any pending interrupts */
GR_TIMEHS_INTCLR(0, 1) = 0x1;
/* Force the time to whatever we're told it is */
__hw_clock_source_set(start_t);
/* Here we go... */
task_enable_irq(GC_IRQNUM_TIMEHS0_TIMINT1);
task_enable_irq(GC_IRQNUM_TIMEHS0_TIMINT2);
/* Return the Event timer IRQ number (NOT the HW timer IRQ) */
return GC_IRQNUM_TIMEHS0_TIMINT2;
}
int __hw_clock_source_init(uint32_t start_t)
{
/* bit3, timer 3 and timer 4 combinational mode */
IT83XX_ETWD_ETXCTRL(FREE_EXT_TIMER_L) |= (1 << 3);
/* init free running timer (timer 4, TIMER_H), clock source is 8mhz */
ext_timer_ms(FREE_EXT_TIMER_H, EXT_PSR_8M_HZ, 0, 1, 0xffffffff, 1, 1);
/* 1us counter settiing (timer 3, TIMER_L) */
ext_timer_ms(FREE_EXT_TIMER_L, EXT_PSR_8M_HZ, 1, 0, 7, 1, 1);
__hw_clock_source_set(start_t);
/* init event timer */
ext_timer_ms(EVENT_EXT_TIMER, EXT_PSR_8M_HZ, 0, 0, 0xffffffff, 1, 1);
/* returns the IRQ number of event timer */
return et_ctrl_regs[EVENT_EXT_TIMER].irq;
}
int __hw_clock_source_init(uint32_t start_t)
{
#ifdef BOARD_REI
/* reload_val = (0xFFFFFFFF / SECOND) * clock_get_freq(); */
/* reload_val = 0xFFFFFFFF; */
#endif /* defined(BOARD_REI) */
/*
* Use Timer 0 as the clock. The clock source for the timer block
* cannot be prescaled down to 1MHz, therefore, we'll have to handle the
* rollovers.
*
* There's also no match functionality, so set up an additional timer,
* Timer 1, to handle events.
*/
/* Disable the timers. */
ROTOR_MCU_TMR_TNCR(0) &= ~(1 << 0);
ROTOR_MCU_TMR_TNCR(1) &= ~(1 << 0);
/*
* Timer 0
*
* Unmask interrupt, set user-defined count mode, and disable PWM.
*/
ROTOR_MCU_TMR_TNCR(0) = (1 << 1);
/* Use the specified start timer value and start the timer. */
__hw_clock_source_set(start_t);
/*
* Timer 1
*
* Unmask interrupt, set user-defined count mode, and disable PWM.
*/
ROTOR_MCU_TMR_TNCR(1) = (1 << 1);
/* Enable interrupts. */
task_enable_irq(ROTOR_MCU_IRQ_TIMER_0);
task_enable_irq(ROTOR_MCU_IRQ_TIMER_1);
/* Return event timer IRQ number. */
return ROTOR_MCU_IRQ_TIMER_1;
}
