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bsps: Convert clock drivers to use a timecounter

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Update #2271.
This commit is contained in:
Alexander Krutwig
2015-04-01 15:33:25 +02:00
committed by Sebastian Huber
parent 7cd2484c4c
commit 75acd9e69f
48 changed files with 689 additions and 644 deletions
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37
c/src/lib/libbsp/arm/shared/lpc/clock/lpc-clock-config.c
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@@ -7,10 +7,10 @@
*/
/*
* Copyright (c) 2009-2012 embedded brains GmbH. All rights reserved.
* Copyright (c) 2009-2015 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
@@ -21,6 +21,7 @@
*/
#include <rtems.h>
#include <rtems/timecounter.h>
#include <bsp/lpc-clock-config.h>
#include <bsp/lpc-timer.h>
@@ -33,6 +34,16 @@ void Clock_isr(rtems_irq_hdl_param arg);
static volatile lpc_timer *const lpc_clock =
(volatile lpc_timer *) LPC_CLOCK_TIMER_BASE;
static volatile lpc_timer *const lpc_timecounter =
(volatile lpc_timer *) LPC_CLOCK_TIMECOUNTER_BASE;
static struct timecounter lpc_clock_tc;
static uint32_t lpc_clock_tc_get_timecount(struct timecounter *tc)
{
return lpc_timecounter->tc;
}
static void lpc_clock_at_tick(void)
{
lpc_clock->ir = LPC_TIMER_IR_MR0;
@@ -56,6 +67,7 @@ static void lpc_clock_handler_install(void)
static void lpc_clock_initialize(void)
{
uint32_t mask;
uint64_t interval = ((uint64_t) LPC_CLOCK_REFERENCE
* (uint64_t) rtems_configuration_get_microseconds_per_tick()) / 1000000;
@@ -85,6 +97,13 @@ static void lpc_clock_initialize(void)
/* Enable timer */
lpc_clock->tcr = LPC_TIMER_TCR_EN;
/* Install timecounter */
lpc_clock_tc.tc_get_timecount = lpc_clock_tc_get_timecount;
lpc_clock_tc.tc_counter_mask = 0xffffffff;
lpc_clock_tc.tc_frequency = LPC_CLOCK_REFERENCE;
lpc_clock_tc.tc_quality = RTEMS_TIMECOUNTER_QUALITY_CLOCK_DRIVER;
rtems_timecounter_install(&lpc_clock_tc);
}
static void lpc_clock_cleanup(void)
@@ -105,18 +124,6 @@ static void lpc_clock_cleanup(void)
}
}
static uint32_t lpc_clock_nanoseconds_since_last_tick(void)
{
uint64_t k = (1000000000ULL << 32) / LPC_CLOCK_REFERENCE;
uint64_t c = lpc_clock->tc;
if ((lpc_clock->ir & LPC_TIMER_IR_MR0) != 0) {
c = lpc_clock->tc + lpc_clock->mr0;
}
return (uint32_t) ((c * k) >> 32);
}
#define Clock_driver_support_at_tick() lpc_clock_at_tick()
#define Clock_driver_support_initialize_hardware() lpc_clock_initialize()
#define Clock_driver_support_install_isr(isr, old_isr) \
@@ -126,8 +133,6 @@ static uint32_t lpc_clock_nanoseconds_since_last_tick(void)
} while (0)
#define Clock_driver_support_shutdown_hardware() lpc_clock_cleanup()
#define Clock_driver_nanoseconds_since_last_tick \
lpc_clock_nanoseconds_since_last_tick
/* Include shared source clock driver code */
#include "../../../../shared/clockdrv_shell.h"