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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @brief Source file for timer functions.
*/
/*
* Copyright (c) 2008 embedded brains GmbH & Co. KG
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <rtems/bspIo.h>
#include <mpc83xx/mpc83xx.h>
#include <mpc83xx/gtm.h>
#define RTEMS_STATUS_CHECKS_USE_PRINTK
#include <rtems/status-checks.h>
#define MPC83XX_GTM_CHECK_INDEX( timer) \
if (( timer) < 0 || ( timer) >= MPC83XX_GTM_NUMBER) { \
return RTEMS_INVALID_NUMBER; \
}
#define GTM_MODULE(timer) ((timer)/4)
#define GTM_MODULE_TIMER(timer) ((timer)%4)
#define GTM_HIGH(timer) (GTM_MODULE_TIMER(timer)/2)
#define GTM_LOW(timer) (GTM_MODULE_TIMER(timer)%2)
#define MPC83XX_GTM_CLOCK_MASK MPC83XX_GTM_CLOCK_EXTERN
static const uint8_t mpc83xx_gmt_interrupt_vector_table [MPC83XX_GTM_NUMBER] = { 90, 78, 84, 72, 91, 79, 85, 73 };
rtems_status_code mpc83xx_gtm_initialize( int timer, int clock)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_interrupt_level level;
unsigned mask = 0xfU << (GTM_LOW(timer) * 4);
unsigned flags = 0x3U << (GTM_LOW(timer) * 4);
uint8_t reg = 0;
MPC83XX_GTM_CHECK_INDEX( timer);
rtems_interrupt_disable( level);
reg = mpc83xx.gtm [GTM_MODULE(timer)].gtcfr [GTM_HIGH(timer)].reg;
mpc83xx.gtm [GTM_MODULE(timer)].gtcfr [GTM_HIGH(timer)].reg =
(uint8_t) ((reg & ~mask) | flags);
mpc83xx.gtm [GTM_MODULE(timer)]
.gt_tim_regs [GTM_HIGH(timer)]
.gtmdr [GTM_LOW(timer)] = 0;
rtems_interrupt_enable( level);
sc = mpc83xx_gtm_set_clock( timer, clock);
RTEMS_CHECK_SC( sc, "Set clock");
sc = mpc83xx_gtm_set_value( timer, 0);
RTEMS_CHECK_SC( sc, "Set value");
sc = mpc83xx_gtm_set_reference( timer, 0);
RTEMS_CHECK_SC( sc, "Set reference");
sc = mpc83xx_gtm_set_prescale( timer, 0);
RTEMS_CHECK_SC( sc, "Set prescale");
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_enable_restart( int timer, bool enable)
{
rtems_interrupt_level level;
MPC83XX_GTM_CHECK_INDEX( timer);
rtems_interrupt_disable( level);
if (enable) {
mpc83xx.gtm [GTM_MODULE(timer)]
.gt_tim_regs [GTM_HIGH(timer)]
.gtmdr [GTM_LOW(timer)] |= 0x0008;
} else {
mpc83xx.gtm [GTM_MODULE(timer)]
.gt_tim_regs [GTM_HIGH(timer)]
.gtmdr [GTM_LOW(timer)] &= ~0x0008;
}
rtems_interrupt_enable( level);
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_set_clock( int timer, int clock)
{
rtems_interrupt_level level;
uint16_t reg = 0;
MPC83XX_GTM_CHECK_INDEX( timer);
if (clock & ~MPC83XX_GTM_CLOCK_MASK) {
return RTEMS_INVALID_CLOCK;
}
rtems_interrupt_disable( level);
reg = mpc83xx.gtm [GTM_MODULE(timer)]
.gt_tim_regs [GTM_HIGH(timer)]
.gtmdr [GTM_LOW(timer)];
mpc83xx.gtm [GTM_MODULE(timer)]
.gt_tim_regs [GTM_HIGH(timer)]
.gtmdr [GTM_LOW(timer)] = (reg & ~MPC83XX_GTM_CLOCK_MASK) | clock;
rtems_interrupt_enable( level);
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_get_clock( int timer, int *clock)
{
MPC83XX_GTM_CHECK_INDEX( timer);
*clock = mpc83xx.gtm [GTM_MODULE(timer)]
.gt_tim_regs [GTM_HIGH(timer)]
.gtmdr [GTM_LOW(timer)] & MPC83XX_GTM_CLOCK_MASK;
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_start( int timer)
{
rtems_interrupt_level level;
uint8_t flags = 0x2 << (GTM_LOW(timer) * 4);
MPC83XX_GTM_CHECK_INDEX( timer);
rtems_interrupt_disable( level);
mpc83xx.gtm [GTM_MODULE(timer)]
.gtcfr [GTM_HIGH(timer)].reg &= ~flags;
rtems_interrupt_enable( level);
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_stop( int timer)
{
rtems_interrupt_level level;
uint8_t flags = 0x2 << (GTM_LOW(timer) * 4);
MPC83XX_GTM_CHECK_INDEX( timer);
rtems_interrupt_disable( level);
mpc83xx.gtm [GTM_MODULE(timer)].gtcfr [GTM_HIGH(timer)].reg |= flags;
rtems_interrupt_enable( level);
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_set_value( int timer, uint16_t value)
{
MPC83XX_GTM_CHECK_INDEX( timer);
mpc83xx.gtm [GTM_MODULE(timer)].gt_tim_regs [GTM_HIGH(timer)].gtcnr [GTM_LOW(timer)] = value;
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_get_value( int timer, uint16_t *value)
{
MPC83XX_GTM_CHECK_INDEX( timer);
*value = mpc83xx.gtm [GTM_MODULE(timer)].gt_tim_regs [GTM_HIGH(timer)].gtcnr [GTM_LOW(timer)];
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_set_reference( int timer, uint16_t reference)
{
MPC83XX_GTM_CHECK_INDEX( timer);
mpc83xx.gtm [GTM_MODULE(timer)].gt_tim_regs [GTM_HIGH(timer)].gtrfr [GTM_LOW(timer)] = reference;
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_get_reference( int timer, uint16_t *reference)
{
MPC83XX_GTM_CHECK_INDEX( timer);
*reference = mpc83xx.gtm [GTM_MODULE(timer)].gt_tim_regs [GTM_HIGH(timer)].gtrfr [GTM_LOW(timer)];
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_set_prescale( int timer, uint8_t prescale)
{
MPC83XX_GTM_CHECK_INDEX( timer);
mpc83xx.gtm [GTM_MODULE(timer)].gtpsr [GTM_MODULE_TIMER(timer)] = prescale;
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_get_prescale( int timer, uint8_t *prescale)
{
MPC83XX_GTM_CHECK_INDEX( timer);
*prescale = mpc83xx.gtm [GTM_MODULE(timer)].gtpsr [GTM_MODULE_TIMER(timer)];
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_interrupt_get_vector( int timer, rtems_vector_number *vector)
{
MPC83XX_GTM_CHECK_INDEX( timer);
*vector = mpc83xx_gmt_interrupt_vector_table [timer];
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_interrupt_enable( int timer)
{
rtems_interrupt_level level;
MPC83XX_GTM_CHECK_INDEX( timer);
rtems_interrupt_disable( level);
mpc83xx.gtm [GTM_MODULE(timer)].gt_tim_regs [GTM_HIGH(timer)].gtmdr [GTM_LOW(timer)] |= 0x0010;
rtems_interrupt_enable( level);
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_interrupt_disable( int timer)
{
rtems_interrupt_level level;
MPC83XX_GTM_CHECK_INDEX( timer);
rtems_interrupt_disable( level);
mpc83xx.gtm [GTM_MODULE(timer)].gt_tim_regs [GTM_HIGH(timer)].gtmdr [GTM_LOW(timer)] &= ~0x0010;
rtems_interrupt_enable( level);
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_interrupt_clear( int timer)
{
MPC83XX_GTM_CHECK_INDEX( timer);
mpc83xx.gtm [GTM_MODULE(timer)].gtevr [GTM_MODULE_TIMER(timer)] = 0x0002;
return RTEMS_SUCCESSFUL;
}
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