nuttx/arch/arm/src/phy62xx/timer.c

/****************************************************************************
 * arch/arm/src/phy62xx/timer.c
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include "rom_sym_def.h"
#include "timer.h"
#include "error.h"
#include "clock.h"
#include "pwrmgr.h"
#include "nvic.h"
#include "arm_internal.h"
#include "jump_function.h"
#include <arch/irq.h>

/****************************************************************************
 * Public Functions
 ****************************************************************************/

AP_TIM_TypeDef *const TimerIndex[FREE_TIMER_NUMBER] =
    {
  AP_TIM5, AP_TIM6
    };

static ap_tm_hdl_t s_ap_callback = NULL;

static int hal_timer_clear_int(AP_TIM_TypeDef *TIMx)
{
  return TIMx->EOI;
}

static void hal_timer_stop_counter(AP_TIM_TypeDef *TIMx)
{
  TIMx->ControlReg = 0;
  TIMx->LoadCount = 0;    /* 0x0 */
  TIMx->CurrentCount = 0; /* 0x4 */
}

static void hal_timer_set_loadtimer(AP_TIM_TypeDef *TIMx, int time)
{
  if (time > 0)
    {
      TIMx->ControlReg = 0x0;
      TIMx->ControlReg = 0x2;
      TIMx->LoadCount = 4 * time;  /* 4MHz system timer, * 4 to convert to 1MHz timer */
      TIMx->ControlReg = 0x3;
    }
  else
    {
      TIMx->ControlReg = 0x0;
    }
}

void __attribute__((used)) hal_TIMER5_IRQHandler(void)
{
  if (AP_TIM5->status & 0x1)
    {
      hal_timer_clear_int(AP_TIM5);

      if (s_ap_callback)
          s_ap_callback(HAL_EVT_TIMER_5);
    }
}

void __attribute__((used)) hal_TIMER6_IRQHandler(void)
{
  if (AP_TIM6->status & 0x1)
    {
      hal_timer_clear_int(AP_TIM6);

      if (s_ap_callback)
          s_ap_callback(HAL_EVT_TIMER_6);
    }
}

static void hal_timer_wakeup_handler(void)
{
  if (s_ap_callback)
      s_ap_callback(HAL_EVT_WAKEUP);
}

void hal_timer_sleep_handler(void)
{
  if (s_ap_callback)
      s_ap_callback(HAL_EVT_SLEEP);
}

int hal_timer_mask_int(User_Timer_e timeId, bool en)
{
  volatile AP_TIM_TypeDef *TIMx;
  TIMx = TimerIndex[timeId - AP_TIMER_ID_5];

  if (en)
      TIMx->ControlReg |= (1 << 2);
  else
      TIMx->ControlReg &= ~(1 << 2);

  return PPlus_SUCCESS;
}

int hal_timer_set(User_Timer_e timeId, uint32_t us)
{
  uint32_t time = us;

  switch (timeId)
    {
      case AP_TIMER_ID_5:
          JUMP_FUNCTION(TIM5_IRQ_HANDLER) = (uint32_t)&hal_TIMER5_IRQHandler;
          NVIC_EnableIRQ((IRQn_Type)TIM5_IRQn);
          NVIC_SetPriority((IRQn_Type)TIM5_IRQn, IRQ_PRIO_HAL);
          hal_timer_set_loadtimer(AP_TIM5, time);
          hal_clk_gate_enable(MOD_TIMER5);
          break;

      case AP_TIMER_ID_6:
          JUMP_FUNCTION(TIM6_IRQ_HANDLER) = (uint32_t)&hal_TIMER6_IRQHandler;
          NVIC_EnableIRQ((IRQn_Type)TIM6_IRQn);
          NVIC_SetPriority((IRQn_Type)TIM6_IRQn, IRQ_PRIO_HAL);
          hal_timer_set_loadtimer(AP_TIM6, time);
          hal_clk_gate_enable(MOD_TIMER6);
          break;

      default:
          return PPlus_ERR_INVALID_PARAM;
    }

    return PPlus_SUCCESS;
}

int hal_timer_stop(User_Timer_e timeId)
{
  switch (timeId)
    {
      case AP_TIMER_ID_5:
          JUMP_FUNCTION(TIM5_IRQ_HANDLER) = 0;
          hal_timer_stop_counter(AP_TIM5);
          NVIC_DisableIRQ((IRQn_Type)TIM5_IRQn);
          hal_clk_gate_disable(MOD_TIMER5);
          break;

      case AP_TIMER_ID_6:
          JUMP_FUNCTION(TIM6_IRQ_HANDLER) = 0;
          hal_timer_stop_counter(AP_TIM6);
          NVIC_DisableIRQ((IRQn_Type)TIM6_IRQn);
          hal_clk_gate_disable(MOD_TIMER6);
          break;

      default:
          return PPlus_ERR_INVALID_PARAM;
    }

  return PPlus_SUCCESS;
}

int hal_timer_init(ap_tm_hdl_t callback)
{
  s_ap_callback = callback;
  hal_timer_stop(AP_TIMER_ID_5);
  hal_timer_stop(AP_TIMER_ID_6);
  return hal_pwrmgr_register(MOD_TIMER, hal_timer_sleep_handler,
      hal_timer_wakeup_handler);
}

int hal_timer_deinit(void)
{
  s_ap_callback = NULL;
  return hal_pwrmgr_unregister(MOD_TIMER);
}

static int systic_timerisr(int irq, uint32_t *regs, void *arg)
{
  /* Process timer interrupt */

  nxsched_process_timer();
  return 0;
}

extern uint32_t timer_sysclk_get_clk(void);

void up_timer_initialize(void)
{
  irq_attach(PHY62XX_IRQ_SYSTICK, (xcpt_t)systic_timerisr, NULL);

  putreg32((timer_sysclk_get_clk() / 100 - 1), ARMV6M_SYSTICK_RVR);  /* 10ms tick */
  putreg32((SYSTICK_CSR_TICKINT | SYSTICK_CSR_ENABLE |
      SYSTICK_CSR_CLKSOURCE), ARMV6M_SYSTICK_CSR);

  /* And enable the timer interrupt */

  up_enable_irq(PHY62XX_IRQ_SYSTICK);

  /* set_timer(AP_TIM3, 2000); */

  NVIC_EnableIRQ((IRQn_Type)TIM3_IRQn);
}