forked from Imagelibrary/rtems
74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
/*
|
|
* 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, _old ) \
|
|
do { \
|
|
rtems_status_code status = RTEMS_SUCCESSFUL; \
|
|
(_old) = NULL; /* avoid warning */; \
|
|
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"
|