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/*
* @file clock.c
*
* @author Miguel Masmano <mmasmano@fentiss.com>
*
* @copyright
* Copyright 2016 Fent Innovative Software Solutions (FENTISS).
* All rights reserved.
*
* Copyright 2017 embedded brains GmbH.
*
* 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/timecounter.h>
#include <bsp.h>
#include <bsp/irq.h>
#include <bsp/fatal.h>
#include <xm.h>
static struct timecounter xm_tms570_tc;
static uint32_t xm_tms570_clock_last;
static uint32_t xm_tms570_clock_get_time(void)
{
xmTime_t now;
XM_get_time(XM_HW_CLOCK, &now);
return (uint32_t) now;
}
static uint32_t xm_tms570_clock_get_timecount(struct timecounter *tc)
{
(void) tc;
return xm_tms570_clock_get_time();
}
static void xm_tms570_clock_initialize_hardware(void)
{
xmTime_t now;
uint32_t us_per_tick;
XM_get_time(XM_HW_CLOCK, &now);
us_per_tick = rtems_configuration_get_microseconds_per_tick();
XM_set_timer(XM_HW_CLOCK, now + us_per_tick, us_per_tick);
xm_tms570_clock_last = (uint32_t) now;
xm_tms570_tc.tc_get_timecount = xm_tms570_clock_get_timecount;
xm_tms570_tc.tc_counter_mask = 0xffffffff;
xm_tms570_tc.tc_frequency = 1000000;
xm_tms570_tc.tc_quality = RTEMS_TIMECOUNTER_QUALITY_CLOCK_DRIVER;
rtems_timecounter_install(&xm_tms570_tc);
}
static void xm_tms570_clock_timecounter_tick(void)
{
uint32_t us_per_tick;
uint32_t now;
uint32_t last;
now = xm_tms570_clock_get_time();
us_per_tick = rtems_configuration_get_microseconds_per_tick();
last = xm_tms570_clock_last;
while ((now - last) >= us_per_tick) {
rtems_timecounter_tick();
last += us_per_tick;
}
xm_tms570_clock_last = last;
}
static void xm_tms570_clock_shutdown_hardware(void)
{
XM_set_irqmask(0, 1U << XM_VT_EXT_HW_TIMER);
XM_set_timer(XM_HW_CLOCK, 0, 0);
}
static void xm_tms570_clock_install_isr(rtems_interrupt_handler handler)
{
rtems_status_code sc;
sc = rtems_interrupt_handler_install(
XM_TMS570_IRQ_HWTIMER,
"Clock",
RTEMS_INTERRUPT_UNIQUE,
handler,
NULL
);
if (sc != RTEMS_SUCCESSFUL) {
bsp_fatal(XM_BSP_FATAL_TMS570_CLOCK_IRQ_INSTALL);
}
}
#define Clock_driver_support_initialize_hardware \
xm_tms570_clock_initialize_hardware
#define Clock_driver_timecounter_tick() \
xm_tms570_clock_timecounter_tick()
#define Clock_driver_support_initialize_hardware \
xm_tms570_clock_initialize_hardware
#define Clock_driver_support_shutdown_hardware \
xm_tms570_clock_shutdown_hardware
#define Clock_driver_support_install_isr(clock_isr, old_isr) \
xm_tms570_clock_install_isr(clock_isr)
#include "../../../shared/clockdrv_shell.h"
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