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/*
* Cirrus EP7312 Clock driver
*
* Copyright (c) 2002 by Jay Monkman <jtm@smoothsmoothie.com>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#include <rtems.h>
#include <ep7312.h>
#include <bsp.h>
#include <bsp/irq.h>
#if ON_SKYEYE==1
#define CLOCK_DRIVER_USE_FAST_IDLE
#endif
void Clock_isr(rtems_irq_hdl_param arg);
static void clock_isr_on(const rtems_irq_connect_data *unused);
static void clock_isr_off(const rtems_irq_connect_data *unused);
static int clock_isr_is_on(const rtems_irq_connect_data *irq);
rtems_irq_connect_data clock_isr_data = {
.name = BSP_TC1OI,
.hdl = Clock_isr,
.handle = NULL,
.on = clock_isr_on,
.off = clock_isr_off,
.isOn = clock_isr_is_on,
};
#define Clock_driver_support_at_tick() \
do { \
*EP7312_TC1EOI = 0xffffffff; \
} while(0)
#define Clock_driver_support_install_isr( _new, _old ) \
do { \
(_old) = NULL; /* avoid warning */; \
BSP_install_rtems_irq_handler(&clock_isr_data); \
} while(0)
/*
* Set up the clock hardware
*/
#if ON_SKYEYE
#define TCD_VALUE \
(rtems_configuration_get_microseconds_per_tick() * 2000)/25000
#else
#define TCD_VALUE \
(rtems_configuration_get_microseconds_per_tick() * 2000)/1000000
#endif
#define Clock_driver_support_initialize_hardware() \
do { \
*EP7312_SYSCON1 |= EP7312_SYSCON1_TC1_PRESCALE; \
*EP7312_TC1D = TCD_VALUE; \
*EP7312_TC1EOI = 0xFFFFFFFF; \
} while (0)
#define Clock_driver_support_shutdown_hardware() \
do { \
BSP_remove_rtems_irq_handler(&clock_isr_data); \
} while (0)
/**
* Return the nanoseconds since last tick
*/
uint32_t clock_driver_get_nanoseconds_since_last_tick(void)
{
return 0;
}
#define Clock_driver_nanoseconds_since_last_tick \
clock_driver_get_nanoseconds_since_last_tick
static void clock_isr_on(const rtems_irq_connect_data *unused)
{
}
static void clock_isr_off(const rtems_irq_connect_data *unused)
{
}
static int clock_isr_is_on(const rtems_irq_connect_data *irq)
{
return 1;
}
#include "../../../shared/clockdrv_shell.h"
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