/**
* @file
*
* @brief Source file for timer functions.
*/
/*
* Copyright (c) 2008
* Embedded Brains GmbH
* Obere Lagerstr. 30
* D-82178 Puchheim
* Germany
* rtems@embedded-brains.de
*
* The license and distribution terms for this file may be found in the file
* LICENSE in this distribution or at http://www.rtems.com/license/LICENSE.
*/
#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 MPC83XX_GTM_VARIABLES( timer) \
int module = (timer) / 4; \
int module_timer = (timer) % 4; \
int high = module_timer / 2; \
int low = module_timer % 2; \
rtems_interrupt_level level;
#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 };
static const uint8_t mpc83xx_gmt_interrupt_priority_table [MPC83XX_GTM_NUMBER] = { 113, 77, 95, 59, 116, 80, 98, 62 };
rtems_status_code mpc83xx_gtm_initialize( int timer, int clock)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
MPC83XX_GTM_VARIABLES( timer);
uint8_t mask = 0xf << (low * 4);
uint8_t flags = 0x3 << (low * 4);
uint16_t reg = 0;
MPC83XX_GTM_CHECK_INDEX( timer);
rtems_interrupt_disable( level);
reg = mpc83xx.gtm [module].gtcfr [high].reg;
mpc83xx.gtm [module].gtcfr [high].reg = (reg & ~mask) | flags;
mpc83xx.gtm [module].gt_tim_regs [high].gtmdr [low] = 0;
rtems_interrupt_enable( level);
sc = mpc83xx_gtm_set_clock( timer, clock);
CHECK_SC( sc, "Set clock");
sc = mpc83xx_gtm_set_value( timer, 0);
CHECK_SC( sc, "Set value");
sc = mpc83xx_gtm_set_reference( timer, 0);
CHECK_SC( sc, "Set reference");
sc = mpc83xx_gtm_set_prescale( timer, 0);
CHECK_SC( sc, "Set prescale");
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_enable_restart( int timer, bool enable)
{
MPC83XX_GTM_VARIABLES( timer);
MPC83XX_GTM_CHECK_INDEX( timer);
rtems_interrupt_disable( level);
if (enable) {
mpc83xx.gtm [module].gt_tim_regs [high].gtmdr [low] |= 0x0008;
} else {
mpc83xx.gtm [module].gt_tim_regs [high].gtmdr [low] &= ~0x0008;
}
rtems_interrupt_enable( level);
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_set_clock( int timer, int clock)
{
MPC83XX_GTM_VARIABLES( timer);
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 [module].gt_tim_regs [high].gtmdr [low];
mpc83xx.gtm [module].gt_tim_regs [high].gtmdr [low] = (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_VARIABLES( timer);
MPC83XX_GTM_CHECK_INDEX( timer);
*clock = mpc83xx.gtm [module].gt_tim_regs [high].gtmdr [low] & MPC83XX_GTM_CLOCK_MASK;
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_start( int timer)
{
MPC83XX_GTM_VARIABLES( timer);
uint8_t flags = 0x2 << (low * 4);
MPC83XX_GTM_CHECK_INDEX( timer);
rtems_interrupt_disable( level);
mpc83xx.gtm [module].gtcfr [high].reg &= ~flags;
rtems_interrupt_enable( level);
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_stop( int timer)
{
MPC83XX_GTM_VARIABLES( timer);
uint8_t flags = 0x2 << (low * 4);
MPC83XX_GTM_CHECK_INDEX( timer);
rtems_interrupt_disable( level);
mpc83xx.gtm [module].gtcfr [high].reg |= flags;
rtems_interrupt_enable( level);
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_set_value( int timer, uint16_t value)
{
MPC83XX_GTM_VARIABLES( timer);
MPC83XX_GTM_CHECK_INDEX( timer);
mpc83xx.gtm [module].gt_tim_regs [high].gtcnr [low] = value;
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_get_value( int timer, uint16_t *value)
{
MPC83XX_GTM_VARIABLES( timer);
MPC83XX_GTM_CHECK_INDEX( timer);
*value = mpc83xx.gtm [module].gt_tim_regs [high].gtcnr [low];
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_set_reference( int timer, uint16_t reference)
{
MPC83XX_GTM_VARIABLES( timer);
MPC83XX_GTM_CHECK_INDEX( timer);
mpc83xx.gtm [module].gt_tim_regs [high].gtrfr [low] = reference;
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_get_reference( int timer, uint16_t *reference)
{
MPC83XX_GTM_VARIABLES( timer);
MPC83XX_GTM_CHECK_INDEX( timer);
reference = mpc83xx.gtm [module].gt_tim_regs [high].gtrfr [low];
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_set_prescale( int timer, uint8_t prescale)
{
MPC83XX_GTM_VARIABLES( timer);
MPC83XX_GTM_CHECK_INDEX( timer);
mpc83xx.gtm [module].gtpsr [module_timer] = prescale;
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_get_prescale( int timer, uint8_t *prescale)
{
MPC83XX_GTM_VARIABLES( timer);
MPC83XX_GTM_CHECK_INDEX( timer);
prescale = mpc83xx.gtm [module].gtpsr [module_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)
{
MPC83XX_GTM_VARIABLES( timer);
MPC83XX_GTM_CHECK_INDEX( timer);
rtems_interrupt_disable( level);
mpc83xx.gtm [module].gt_tim_regs [high].gtmdr [low] |= 0x0010;
rtems_interrupt_enable( level);
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_interrupt_disable( int timer)
{
MPC83XX_GTM_VARIABLES( timer);
MPC83XX_GTM_CHECK_INDEX( timer);
rtems_interrupt_disable( level);
mpc83xx.gtm [module].gt_tim_regs [high].gtmdr [low] &= ~0x0010;
rtems_interrupt_enable( level);
return RTEMS_SUCCESSFUL;
}
rtems_status_code mpc83xx_gtm_interrupt_clear( int timer)
{
MPC83XX_GTM_VARIABLES( timer);
MPC83XX_GTM_CHECK_INDEX( timer);
mpc83xx.gtm [module].gtevr [module_timer] = 0x0002;
return RTEMS_SUCCESSFUL;
}
