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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.org/license/LICENSE.
*/
#include <rtems.h>
#include <ep7312.h>
#include <bsp.h>
#include <bsp/irq.h>
#include <assert.h>
#if ON_SKYEYE==1
#define CLOCK_DRIVER_USE_FAST_IDLE 1
#endif
void Clock_isr(void * arg);
#define Clock_driver_support_at_tick() \
do { \
*EP7312_TC1EOI = 0xffffffff; \
} while(0)
#define Clock_driver_support_install_isr( _new ) \
do { \
rtems_status_code status = RTEMS_SUCCESSFUL; \
status = rtems_interrupt_handler_install( \
BSP_TC1OI, \
"Clock", \
RTEMS_INTERRUPT_UNIQUE, \
Clock_isr, \
NULL \
); \
assert(status == RTEMS_SUCCESSFUL); \
} 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 { \
rtems_status_code status = RTEMS_SUCCESSFUL; \
status = rtems_interrupt_handler_remove( \
BSP_TC1OI, \
Clock_isr, \
NULL \
); \
assert(status == RTEMS_SUCCESSFUL); \
} while (0)
#define CLOCK_DRIVER_USE_DUMMY_TIMECOUNTER
#include "../../../shared/clockdrv_shell.h"
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